graphics/openfx-arena: Update to 2.4.3 and fix build

PR:		265166

Reported by:	pkg-fallout

8 files changed, 29 insertions, 8059 deletions

diff --git a/graphics/openfx-arena/Makefile b/graphics/openfx-arena/Makefile
index db857e90e129..a1d27d47d088 100644
--- a/graphics/openfx-arena/Makefile
+++ b/graphics/openfx-arena/Makefile
@@ -1,23 +1,18 @@
 PORTNAME=	openfx-arena
-PORTVERSION=	2.3.14
+PORTVERSION=	2.4.3
 DISTVERSIONPREFIX=	Natron-
-PORTREVISION=	56
 CATEGORIES=	graphics
 
-PATCH_SITES=	https://github.com/${GH_ACCOUNT}/${GH_PROJECT}/commit/
-PATCHFILES=	bc06a46bb1ccef8f7da6caf17faf165fbac662db.diff:-p1
-
 MAINTAINER=	olivier@FreeBSD.org
 COMMENT=	Extra OpenFX plugins for Natron
 
 LICENSE=	GPLv2
 
-BROKEN=		does not build: error: no member named 'apply' in 'OpenColorIO_v2_1::Processor'
-
 ONLY_FOR_ARCHS=	amd64 powerpc64 powerpc64le
 BUILD_DEPENDS=	opencl>=0:devel/opencl
 LIB_DEPENDS=	libOpenColorIO.so:graphics/opencolorio \
 		libfontconfig.so:x11-fonts/fontconfig \
+		libfribidi.so:converters/fribidi \
 		libcdr-0.1.so:graphics/libcdr01 \
 		librevenge-0.0.so:textproc/librevenge \
 		libpoppler-glib.so:graphics/poppler-glib \
@@ -35,21 +30,23 @@ LIB_DEPENDS=	libOpenColorIO.so:graphics/opencolorio \
 		liblqr-1.so:graphics/liblqr-1 \
 		libfftw3.so:math/fftw3 \
 		libltdl.so:devel/libltdl \
-		libpoppler.so:graphics/poppler
+		libpoppler.so:graphics/poppler \
+		libraqm.so:print/libraqm
 
-USES=		gl gmake gnome iconv magick:6 xorg
+USES=		gl gmake gnome iconv magick:6 ssl xorg
 USE_GITHUB=	yes
 GH_ACCOUNT=	NatronGitHub
-GH_TUPLE=	NatronGitHub:openfx-supportext:e600cae:openfx_supportext/SupportExt \
-		NatronGitHub:openfx:a85dc34:openfx/OpenFX \
-		NatronGitHub:openfx-io:Natron-2.3.12:OpenFX_IO/OpenFX-IO \
-		NatronGitHub:SequenceParsing:9e8b77a:SequenceParsing/OpenFX-IO/IOSupport/SequenceParsing \
-		NatronGitHub:tinydir:3aae922:tinydir/OpenFX-IO/IOSupport/SequenceParsing/tinydir
+GH_TUPLE=	NatronGitHub:openfx-supportext:79d8c22:openfx_supportext/SupportExt \
+		NatronGitHub:openfx:d5db5d0:openfx/OpenFX \
+		NatronGitHub:openfx-io:c6ad47b:OpenFX_IO/OpenFX-IO \
+		lvandeve:lodepng:5601b82:dummy/lodepng \
+		NatronGitHub:SequenceParsing:3c93fcc:SequenceParsing/OpenFX-IO/IOSupport/SequenceParsing \
+		NatronGitHub:tinydir:64fb1d4:tinydir/OpenFX-IO/IOSupport/SequenceParsing/tinydir
 
 MAKE_ENV+=	CONFIG=release
 USE_GL=	gl
 USE_GNOME=	libxml2 pango cairo librsvg2
-USE_XORG+=	x11 xcb xau xdamage xfixes xxf86vm xrender xext xdmcp pixman sm ice xt
+USE_XORG+=	x11 xcb xau xdamage xfixes xft xxf86vm xrender xext xdmcp pixman sm ice xt
 MAKE_ENV+=	CONFIG=release
 
 post-extract:
diff --git a/graphics/openfx-arena/distinfo b/graphics/openfx-arena/distinfo
index 9cca9d7901b1..a372b2efa330 100644
--- a/graphics/openfx-arena/distinfo
+++ b/graphics/openfx-arena/distinfo
@@ -1,15 +1,15 @@
-TIMESTAMP = 1533473532
-SHA256 (NatronGitHub-openfx-arena-Natron-2.3.14_GH0.tar.gz) = 7fd6f987cce774578498d9c649989f1357baf0e6a828352fb72790f1a1373f90
-SIZE (NatronGitHub-openfx-arena-Natron-2.3.14_GH0.tar.gz) = 566620
-SHA256 (NatronGitHub-openfx-supportext-e600cae_GH0.tar.gz) = b6fbe4552d0986a4913ab4e6a999bd30b432646495b2b431d2e295b1ed6514cf
-SIZE (NatronGitHub-openfx-supportext-e600cae_GH0.tar.gz) = 287231
-SHA256 (NatronGitHub-openfx-a85dc34_GH0.tar.gz) = c59082fcd9327e87ff544e93179ddc5b81d39442854283064480526ab153bfde
-SIZE (NatronGitHub-openfx-a85dc34_GH0.tar.gz) = 10651841
-SHA256 (NatronGitHub-openfx-io-Natron-2.3.12_GH0.tar.gz) = 3fcd8b570026113286c516ca5b0590b93338ca124bfccc7e4341a5ee9defa442
-SIZE (NatronGitHub-openfx-io-Natron-2.3.12_GH0.tar.gz) = 468698
-SHA256 (NatronGitHub-SequenceParsing-9e8b77a_GH0.tar.gz) = 7a2c1591b3198f8780bf2b791494da0d9bbd74d073653baa295ff30bf00c16fe
-SIZE (NatronGitHub-SequenceParsing-9e8b77a_GH0.tar.gz) = 15980
-SHA256 (NatronGitHub-tinydir-3aae922_GH0.tar.gz) = eb816fff00d9713742a1f1367432fee0ea73ccb0f458c90035543e923e8e55d1
-SIZE (NatronGitHub-tinydir-3aae922_GH0.tar.gz) = 24552
-SHA256 (bc06a46bb1ccef8f7da6caf17faf165fbac662db.diff) = 3b91e4cdfa5c29000d15fa5a485f648386fcc72aa36bc3d44e759c6cabe5ab88
-SIZE (bc06a46bb1ccef8f7da6caf17faf165fbac662db.diff) = 7313
+TIMESTAMP = 1658449942
+SHA256 (NatronGitHub-openfx-arena-Natron-2.4.3_GH0.tar.gz) = e3835a1fdc2f617fd3d0ed225fe6a80a8ff2fec636e94be55d72cafe80ca610f
+SIZE (NatronGitHub-openfx-arena-Natron-2.4.3_GH0.tar.gz) = 617742
+SHA256 (NatronGitHub-openfx-supportext-79d8c22_GH0.tar.gz) = fa4a1565a46f536540df650d31d8ebb862703043e6386d12bf9a4c500f998d43
+SIZE (NatronGitHub-openfx-supportext-79d8c22_GH0.tar.gz) = 295608
+SHA256 (NatronGitHub-openfx-d5db5d0_GH0.tar.gz) = 7d626b85a7731c8ee4175f7cd7c7c9dd3c7c77523c3c49c19d8090d39fd28161
+SIZE (NatronGitHub-openfx-d5db5d0_GH0.tar.gz) = 10706209
+SHA256 (NatronGitHub-openfx-io-c6ad47b_GH0.tar.gz) = 20ddd9a367371bcbc4f7122712a5724cee89e851099e29215d124be8e6e198e7
+SIZE (NatronGitHub-openfx-io-c6ad47b_GH0.tar.gz) = 481035
+SHA256 (lvandeve-lodepng-5601b82_GH0.tar.gz) = 3ac3a5e5119456ff2bf214336790e69d555f5034a8794cbc77b0801b2b1913fd
+SIZE (lvandeve-lodepng-5601b82_GH0.tar.gz) = 241633
+SHA256 (NatronGitHub-SequenceParsing-3c93fcc_GH0.tar.gz) = 143112f7f59a2edccd63bb8354536f47f77b283d2eda5d2123e058ed8ccd6224
+SIZE (NatronGitHub-SequenceParsing-3c93fcc_GH0.tar.gz) = 16032
+SHA256 (NatronGitHub-tinydir-64fb1d4_GH0.tar.gz) = 728f9948b59131b650bc2c53b8dcb1db8c49ef07c27d0aca3a13b666ae6b2c59
+SIZE (NatronGitHub-tinydir-64fb1d4_GH0.tar.gz) = 24782
diff --git a/graphics/openfx-arena/files/patch-Bundle_Makefile b/graphics/openfx-arena/files/patch-Bundle_Makefile
deleted file mode 100644
index 7a71ae197661..000000000000
--- a/graphics/openfx-arena/files/patch-Bundle_Makefile
+++ /dev/null
@@ -1,18 +0,0 @@
---- Bundle/Makefile.orig	2017-01-03 14:53:38 UTC
-+++ Bundle/Makefile
-@@ -168,11 +168,11 @@ endif
- 
- PNGVERSION = a70c086077c0eaecbae3845e4da4424de5f43361
- 
--lodepng.cpp:
--	curl -o $@ https://raw.githubusercontent.com/lvandeve/lodepng/$(PNGVERSION)/lodepng.cpp
-+#lodepng.cpp:
-+	#curl -o $@ https://raw.githubusercontent.com/lvandeve/lodepng/$(PNGVERSION)/lodepng.cpp
- 
--lodepng.h:
--	curl -o $@ https://raw.githubusercontent.com/lvandeve/lodepng/$(PNGVERSION)/lodepng.h
-+#lodepng.h:
-+	#curl -o $@ https://raw.githubusercontent.com/lvandeve/lodepng/$(PNGVERSION)/lodepng.h
- 
- $(OBJECTPATH)/lodepng.o: lodepng.cpp lodepng.h
- $(OBJECTPATH)/ReadKrita.o: ReadKrita.cpp lodepng.h
diff --git a/graphics/openfx-arena/files/patch-Bundle_lodepng.cpp b/graphics/openfx-arena/files/patch-Bundle_lodepng.cpp
deleted file mode 100644
index 197f1b738811..000000000000
--- a/graphics/openfx-arena/files/patch-Bundle_lodepng.cpp
+++ /dev/null
@@ -1,6226 +0,0 @@
---- Bundle/lodepng.cpp.orig	2017-10-04 17:18:33 UTC
-+++ Bundle/lodepng.cpp
-@@ -0,0 +1,6223 @@
-+/*
-+LodePNG version 20160418
-+
-+Copyright (c) 2005-2016 Lode Vandevenne
-+
-+This software is provided 'as-is', without any express or implied
-+warranty. In no event will the authors be held liable for any damages
-+arising from the use of this software.
-+
-+Permission is granted to anyone to use this software for any purpose,
-+including commercial applications, and to alter it and redistribute it
-+freely, subject to the following restrictions:
-+
-+    1. The origin of this software must not be misrepresented; you must not
-+    claim that you wrote the original software. If you use this software
-+    in a product, an acknowledgment in the product documentation would be
-+    appreciated but is not required.
-+
-+    2. Altered source versions must be plainly marked as such, and must not be
-+    misrepresented as being the original software.
-+
-+    3. This notice may not be removed or altered from any source
-+    distribution.
-+*/
-+
-+/*
-+The manual and changelog are in the header file "lodepng.h"
-+Rename this file to lodepng.cpp to use it for C++, or to lodepng.c to use it for C.
-+*/
-+
-+#include "lodepng.h"
-+
-+#include <limits.h>
-+#include <stdio.h>
-+#include <stdlib.h>
-+
-+#if defined(_MSC_VER) && (_MSC_VER >= 1310) /*Visual Studio: A few warning types are not desired here.*/
-+#pragma warning( disable : 4244 ) /*implicit conversions: not warned by gcc -Wall -Wextra and requires too much casts*/
-+#pragma warning( disable : 4996 ) /*VS does not like fopen, but fopen_s is not standard C so unusable here*/
-+#endif /*_MSC_VER */
-+
-+const char* LODEPNG_VERSION_STRING = "20160418";
-+
-+/*
-+This source file is built up in the following large parts. The code sections
-+with the "LODEPNG_COMPILE_" #defines divide this up further in an intermixed way.
-+-Tools for C and common code for PNG and Zlib
-+-C Code for Zlib (huffman, deflate, ...)
-+-C Code for PNG (file format chunks, adam7, PNG filters, color conversions, ...)
-+-The C++ wrapper around all of the above
-+*/
-+
-+/*The malloc, realloc and free functions defined here with "lodepng_" in front
-+of the name, so that you can easily change them to others related to your
-+platform if needed. Everything else in the code calls these. Pass
-+-DLODEPNG_NO_COMPILE_ALLOCATORS to the compiler, or comment out
-+#define LODEPNG_COMPILE_ALLOCATORS in the header, to disable the ones here and
-+define them in your own project's source files without needing to change
-+lodepng source code. Don't forget to remove "static" if you copypaste them
-+from here.*/
-+
-+#ifdef LODEPNG_COMPILE_ALLOCATORS
-+static void* lodepng_malloc(size_t size)
-+{
-+  return malloc(size);
-+}
-+
-+static void* lodepng_realloc(void* ptr, size_t new_size)
-+{
-+  return realloc(ptr, new_size);
-+}
-+
-+static void lodepng_free(void* ptr)
-+{
-+  free(ptr);
-+}
-+#else /*LODEPNG_COMPILE_ALLOCATORS*/
-+void* lodepng_malloc(size_t size);
-+void* lodepng_realloc(void* ptr, size_t new_size);
-+void lodepng_free(void* ptr);
-+#endif /*LODEPNG_COMPILE_ALLOCATORS*/
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* // Tools for C, and common code for PNG and Zlib.                       // */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+/*
-+Often in case of an error a value is assigned to a variable and then it breaks
-+out of a loop (to go to the cleanup phase of a function). This macro does that.
-+It makes the error handling code shorter and more readable.
-+
-+Example: if(!uivector_resizev(&frequencies_ll, 286, 0)) ERROR_BREAK(83);
-+*/
-+#define CERROR_BREAK(errorvar, code)\
-+{\
-+  errorvar = code;\
-+  break;\
-+}
-+
-+/*version of CERROR_BREAK that assumes the common case where the error variable is named "error"*/
-+#define ERROR_BREAK(code) CERROR_BREAK(error, code)
-+
-+/*Set error var to the error code, and return it.*/
-+#define CERROR_RETURN_ERROR(errorvar, code)\
-+{\
-+  errorvar = code;\
-+  return code;\
-+}
-+
-+/*Try the code, if it returns error, also return the error.*/
-+#define CERROR_TRY_RETURN(call)\
-+{\
-+  unsigned error = call;\
-+  if(error) return error;\
-+}
-+
-+/*Set error var to the error code, and return from the void function.*/
-+#define CERROR_RETURN(errorvar, code)\
-+{\
-+  errorvar = code;\
-+  return;\
-+}
-+
-+/*
-+About uivector, ucvector and string:
-+-All of them wrap dynamic arrays or text strings in a similar way.
-+-LodePNG was originally written in C++. The vectors replace the std::vectors that were used in the C++ version.
-+-The string tools are made to avoid problems with compilers that declare things like strncat as deprecated.
-+-They're not used in the interface, only internally in this file as static functions.
-+-As with many other structs in this file, the init and cleanup functions serve as ctor and dtor.
-+*/
-+
-+#ifdef LODEPNG_COMPILE_ZLIB
-+/*dynamic vector of unsigned ints*/
-+typedef struct uivector
-+{
-+  unsigned* data;
-+  size_t size; /*size in number of unsigned longs*/
-+  size_t allocsize; /*allocated size in bytes*/
-+} uivector;
-+
-+static void uivector_cleanup(void* p)
-+{
-+  ((uivector*)p)->size = ((uivector*)p)->allocsize = 0;
-+  lodepng_free(((uivector*)p)->data);
-+  ((uivector*)p)->data = NULL;
-+}
-+
-+/*returns 1 if success, 0 if failure ==> nothing done*/
-+static unsigned uivector_reserve(uivector* p, size_t allocsize)
-+{
-+  if(allocsize > p->allocsize)
-+  {
-+    size_t newsize = (allocsize > p->allocsize * 2) ? allocsize : (allocsize * 3 / 2);
-+    void* data = lodepng_realloc(p->data, newsize);
-+    if(data)
-+    {
-+      p->allocsize = newsize;
-+      p->data = (unsigned*)data;
-+    }
-+    else return 0; /*error: not enough memory*/
-+  }
-+  return 1;
-+}
-+
-+/*returns 1 if success, 0 if failure ==> nothing done*/
-+static unsigned uivector_resize(uivector* p, size_t size)
-+{
-+  if(!uivector_reserve(p, size * sizeof(unsigned))) return 0;
-+  p->size = size;
-+  return 1; /*success*/
-+}
-+
-+/*resize and give all new elements the value*/
-+static unsigned uivector_resizev(uivector* p, size_t size, unsigned value)
-+{
-+  size_t oldsize = p->size, i;
-+  if(!uivector_resize(p, size)) return 0;
-+  for(i = oldsize; i < size; ++i) p->data[i] = value;
-+  return 1;
-+}
-+
-+static void uivector_init(uivector* p)
-+{
-+  p->data = NULL;
-+  p->size = p->allocsize = 0;
-+}
-+
-+#ifdef LODEPNG_COMPILE_ENCODER
-+/*returns 1 if success, 0 if failure ==> nothing done*/
-+static unsigned uivector_push_back(uivector* p, unsigned c)
-+{
-+  if(!uivector_resize(p, p->size + 1)) return 0;
-+  p->data[p->size - 1] = c;
-+  return 1;
-+}
-+#endif /*LODEPNG_COMPILE_ENCODER*/
-+#endif /*LODEPNG_COMPILE_ZLIB*/
-+
-+/* /////////////////////////////////////////////////////////////////////////// */
-+
-+/*dynamic vector of unsigned chars*/
-+typedef struct ucvector
-+{
-+  unsigned char* data;
-+  size_t size; /*used size*/
-+  size_t allocsize; /*allocated size*/
-+} ucvector;
-+
-+/*returns 1 if success, 0 if failure ==> nothing done*/
-+static unsigned ucvector_reserve(ucvector* p, size_t allocsize)
-+{
-+  if(allocsize > p->allocsize)
-+  {
-+    size_t newsize = (allocsize > p->allocsize * 2) ? allocsize : (allocsize * 3 / 2);
-+    void* data = lodepng_realloc(p->data, newsize);
-+    if(data)
-+    {
-+      p->allocsize = newsize;
-+      p->data = (unsigned char*)data;
-+    }
-+    else return 0; /*error: not enough memory*/
-+  }
-+  return 1;
-+}
-+
-+/*returns 1 if success, 0 if failure ==> nothing done*/
-+static unsigned ucvector_resize(ucvector* p, size_t size)
-+{
-+  if(!ucvector_reserve(p, size * sizeof(unsigned char))) return 0;
-+  p->size = size;
-+  return 1; /*success*/
-+}
-+
-+#ifdef LODEPNG_COMPILE_PNG
-+
-+static void ucvector_cleanup(void* p)
-+{
-+  ((ucvector*)p)->size = ((ucvector*)p)->allocsize = 0;
-+  lodepng_free(((ucvector*)p)->data);
-+  ((ucvector*)p)->data = NULL;
-+}
-+
-+static void ucvector_init(ucvector* p)
-+{
-+  p->data = NULL;
-+  p->size = p->allocsize = 0;
-+}
-+#endif /*LODEPNG_COMPILE_PNG*/
-+
-+#ifdef LODEPNG_COMPILE_ZLIB
-+/*you can both convert from vector to buffer&size and vica versa. If you use
-+init_buffer to take over a buffer and size, it is not needed to use cleanup*/
-+static void ucvector_init_buffer(ucvector* p, unsigned char* buffer, size_t size)
-+{
-+  p->data = buffer;
-+  p->allocsize = p->size = size;
-+}
-+#endif /*LODEPNG_COMPILE_ZLIB*/
-+
-+#if (defined(LODEPNG_COMPILE_PNG) && defined(LODEPNG_COMPILE_ANCILLARY_CHUNKS)) || defined(LODEPNG_COMPILE_ENCODER)
-+/*returns 1 if success, 0 if failure ==> nothing done*/
-+static unsigned ucvector_push_back(ucvector* p, unsigned char c)
-+{
-+  if(!ucvector_resize(p, p->size + 1)) return 0;
-+  p->data[p->size - 1] = c;
-+  return 1;
-+}
-+#endif /*defined(LODEPNG_COMPILE_PNG) || defined(LODEPNG_COMPILE_ENCODER)*/
-+
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+#ifdef LODEPNG_COMPILE_PNG
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+/*returns 1 if success, 0 if failure ==> nothing done*/
-+static unsigned string_resize(char** out, size_t size)
-+{
-+  char* data = (char*)lodepng_realloc(*out, size + 1);
-+  if(data)
-+  {
-+    data[size] = 0; /*null termination char*/
-+    *out = data;
-+  }
-+  return data != 0;
-+}
-+
-+/*init a {char*, size_t} pair for use as string*/
-+static void string_init(char** out)
-+{
-+  *out = NULL;
-+  string_resize(out, 0);
-+}
-+
-+/*free the above pair again*/
-+static void string_cleanup(char** out)
-+{
-+  lodepng_free(*out);
-+  *out = NULL;
-+}
-+
-+static void string_set(char** out, const char* in)
-+{
-+  size_t insize = strlen(in), i;
-+  if(string_resize(out, insize))
-+  {
-+    for(i = 0; i != insize; ++i)
-+    {
-+      (*out)[i] = in[i];
-+    }
-+  }
-+}
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+#endif /*LODEPNG_COMPILE_PNG*/
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+unsigned lodepng_read32bitInt(const unsigned char* buffer)
-+{
-+  return (unsigned)((buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3]);
-+}
-+
-+#if defined(LODEPNG_COMPILE_PNG) || defined(LODEPNG_COMPILE_ENCODER)
-+/*buffer must have at least 4 allocated bytes available*/
-+static void lodepng_set32bitInt(unsigned char* buffer, unsigned value)
-+{
-+  buffer[0] = (unsigned char)((value >> 24) & 0xff);
-+  buffer[1] = (unsigned char)((value >> 16) & 0xff);
-+  buffer[2] = (unsigned char)((value >>  8) & 0xff);
-+  buffer[3] = (unsigned char)((value      ) & 0xff);
-+}
-+#endif /*defined(LODEPNG_COMPILE_PNG) || defined(LODEPNG_COMPILE_ENCODER)*/
-+
-+#ifdef LODEPNG_COMPILE_ENCODER
-+static void lodepng_add32bitInt(ucvector* buffer, unsigned value)
-+{
-+  ucvector_resize(buffer, buffer->size + 4); /*todo: give error if resize failed*/
-+  lodepng_set32bitInt(&buffer->data[buffer->size - 4], value);
-+}
-+#endif /*LODEPNG_COMPILE_ENCODER*/
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* / File IO                                                                / */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+#ifdef LODEPNG_COMPILE_DISK
-+
-+/* returns negative value on error. This should be pure C compatible, so no fstat. */
-+static long lodepng_filesize(const char* filename)
-+{
-+  FILE* file;
-+  long size;
-+  file = fopen(filename, "rb");
-+  if(!file) return -1;
-+
-+  if(fseek(file, 0, SEEK_END) != 0)
-+  {
-+    fclose(file);
-+    return -1;
-+  }
-+
-+  size = ftell(file);
-+  /* It may give LONG_MAX as directory size, this is invalid for us. */
-+  if(size == LONG_MAX) size = -1;
-+
-+  fclose(file);
-+  return size;
-+}
-+
-+/* load file into buffer that already has the correct allocated size. Returns error code.*/
-+static unsigned lodepng_buffer_file(unsigned char* out, size_t size, const char* filename)
-+{
-+  FILE* file;
-+  size_t readsize;
-+  file = fopen(filename, "rb");
-+  if(!file) return 78;
-+
-+  readsize = fread(out, 1, size, file);
-+  fclose(file);
-+
-+  if (readsize != size) return 78;
-+  return 0;
-+}
-+
-+unsigned lodepng_load_file(unsigned char** out, size_t* outsize, const char* filename)
-+{
-+  long size = lodepng_filesize(filename);
-+  if (size < 0) return 78;
-+  *outsize = (size_t)size;
-+
-+  *out = (unsigned char*)lodepng_malloc((size_t)size);
-+  if(!(*out) && size > 0) return 83; /*the above malloc failed*/
-+
-+  return lodepng_buffer_file(*out, (size_t)size, filename);
-+}
-+
-+/*write given buffer to the file, overwriting the file, it doesn't append to it.*/
-+unsigned lodepng_save_file(const unsigned char* buffer, size_t buffersize, const char* filename)
-+{
-+  FILE* file;
-+  file = fopen(filename, "wb" );
-+  if(!file) return 79;
-+  fwrite((char*)buffer , 1 , buffersize, file);
-+  fclose(file);
-+  return 0;
-+}
-+
-+#endif /*LODEPNG_COMPILE_DISK*/
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* // End of common code and tools. Begin of Zlib related code.            // */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+#ifdef LODEPNG_COMPILE_ZLIB
-+#ifdef LODEPNG_COMPILE_ENCODER
-+/*TODO: this ignores potential out of memory errors*/
-+#define addBitToStream(/*size_t**/ bitpointer, /*ucvector**/ bitstream, /*unsigned char*/ bit)\
-+{\
-+  /*add a new byte at the end*/\
-+  if(((*bitpointer) & 7) == 0) ucvector_push_back(bitstream, (unsigned char)0);\
-+  /*earlier bit of huffman code is in a lesser significant bit of an earlier byte*/\
-+  (bitstream->data[bitstream->size - 1]) |= (bit << ((*bitpointer) & 0x7));\
-+  ++(*bitpointer);\
-+}
-+
-+static void addBitsToStream(size_t* bitpointer, ucvector* bitstream, unsigned value, size_t nbits)
-+{
-+  size_t i;
-+  for(i = 0; i != nbits; ++i) addBitToStream(bitpointer, bitstream, (unsigned char)((value >> i) & 1));
-+}
-+
-+static void addBitsToStreamReversed(size_t* bitpointer, ucvector* bitstream, unsigned value, size_t nbits)
-+{
-+  size_t i;
-+  for(i = 0; i != nbits; ++i) addBitToStream(bitpointer, bitstream, (unsigned char)((value >> (nbits - 1 - i)) & 1));
-+}
-+#endif /*LODEPNG_COMPILE_ENCODER*/
-+
-+#ifdef LODEPNG_COMPILE_DECODER
-+
-+#define READBIT(bitpointer, bitstream) ((bitstream[bitpointer >> 3] >> (bitpointer & 0x7)) & (unsigned char)1)
-+
-+static unsigned char readBitFromStream(size_t* bitpointer, const unsigned char* bitstream)
-+{
-+  unsigned char result = (unsigned char)(READBIT(*bitpointer, bitstream));
-+  ++(*bitpointer);
-+  return result;
-+}
-+
-+static unsigned readBitsFromStream(size_t* bitpointer, const unsigned char* bitstream, size_t nbits)
-+{
-+  unsigned result = 0, i;
-+  for(i = 0; i != nbits; ++i)
-+  {
-+    result += ((unsigned)READBIT(*bitpointer, bitstream)) << i;
-+    ++(*bitpointer);
-+  }
-+  return result;
-+}
-+#endif /*LODEPNG_COMPILE_DECODER*/
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* / Deflate - Huffman                                                      / */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+#define FIRST_LENGTH_CODE_INDEX 257
-+#define LAST_LENGTH_CODE_INDEX 285
-+/*256 literals, the end code, some length codes, and 2 unused codes*/
-+#define NUM_DEFLATE_CODE_SYMBOLS 288
-+/*the distance codes have their own symbols, 30 used, 2 unused*/
-+#define NUM_DISTANCE_SYMBOLS 32
-+/*the code length codes. 0-15: code lengths, 16: copy previous 3-6 times, 17: 3-10 zeros, 18: 11-138 zeros*/
-+#define NUM_CODE_LENGTH_CODES 19
-+
-+/*the base lengths represented by codes 257-285*/
-+static const unsigned LENGTHBASE[29]
-+  = {3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31, 35, 43, 51, 59,
-+     67, 83, 99, 115, 131, 163, 195, 227, 258};
-+
-+/*the extra bits used by codes 257-285 (added to base length)*/
-+static const unsigned LENGTHEXTRA[29]
-+  = {0, 0, 0, 0, 0, 0, 0,  0,  1,  1,  1,  1,  2,  2,  2,  2,  3,  3,  3,  3,
-+      4,  4,  4,   4,   5,   5,   5,   5,   0};
-+
-+/*the base backwards distances (the bits of distance codes appear after length codes and use their own huffman tree)*/
-+static const unsigned DISTANCEBASE[30]
-+  = {1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 257, 385, 513,
-+     769, 1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577};
-+
-+/*the extra bits of backwards distances (added to base)*/
-+static const unsigned DISTANCEEXTRA[30]
-+  = {0, 0, 0, 0, 1, 1, 2,  2,  3,  3,  4,  4,  5,  5,   6,   6,   7,   7,   8,
-+       8,    9,    9,   10,   10,   11,   11,   12,    12,    13,    13};
-+
-+/*the order in which "code length alphabet code lengths" are stored, out of this
-+the huffman tree of the dynamic huffman tree lengths is generated*/
-+static const unsigned CLCL_ORDER[NUM_CODE_LENGTH_CODES]
-+  = {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+/*
-+Huffman tree struct, containing multiple representations of the tree
-+*/
-+typedef struct HuffmanTree
-+{
-+  unsigned* tree2d;
-+  unsigned* tree1d;
-+  unsigned* lengths; /*the lengths of the codes of the 1d-tree*/
-+  unsigned maxbitlen; /*maximum number of bits a single code can get*/
-+  unsigned numcodes; /*number of symbols in the alphabet = number of codes*/
-+} HuffmanTree;
-+
-+/*function used for debug purposes to draw the tree in ascii art with C++*/
-+/*
-+static void HuffmanTree_draw(HuffmanTree* tree)
-+{
-+  std::cout << "tree. length: " << tree->numcodes << " maxbitlen: " << tree->maxbitlen << std::endl;
-+  for(size_t i = 0; i != tree->tree1d.size; ++i)
-+  {
-+    if(tree->lengths.data[i])
-+      std::cout << i << " " << tree->tree1d.data[i] << " " << tree->lengths.data[i] << std::endl;
-+  }
-+  std::cout << std::endl;
-+}*/
-+
-+static void HuffmanTree_init(HuffmanTree* tree)
-+{
-+  tree->tree2d = 0;
-+  tree->tree1d = 0;
-+  tree->lengths = 0;
-+}
-+
-+static void HuffmanTree_cleanup(HuffmanTree* tree)
-+{
-+  lodepng_free(tree->tree2d);
-+  lodepng_free(tree->tree1d);
-+  lodepng_free(tree->lengths);
-+}
-+
-+/*the tree representation used by the decoder. return value is error*/
-+static unsigned HuffmanTree_make2DTree(HuffmanTree* tree)
-+{
-+  unsigned nodefilled = 0; /*up to which node it is filled*/
-+  unsigned treepos = 0; /*position in the tree (1 of the numcodes columns)*/
-+  unsigned n, i;
-+
-+  tree->tree2d = (unsigned*)lodepng_malloc(tree->numcodes * 2 * sizeof(unsigned));
-+  if(!tree->tree2d) return 83; /*alloc fail*/
-+
-+  /*
-+  convert tree1d[] to tree2d[][]. In the 2D array, a value of 32767 means
-+  uninited, a value >= numcodes is an address to another bit, a value < numcodes
-+  is a code. The 2 rows are the 2 possible bit values (0 or 1), there are as
-+  many columns as codes - 1.
-+  A good huffman tree has N * 2 - 1 nodes, of which N - 1 are internal nodes.
-+  Here, the internal nodes are stored (what their 0 and 1 option point to).
-+  There is only memory for such good tree currently, if there are more nodes
-+  (due to too long length codes), error 55 will happen
-+  */
-+  for(n = 0; n < tree->numcodes * 2; ++n)
-+  {
-+    tree->tree2d[n] = 32767; /*32767 here means the tree2d isn't filled there yet*/
-+  }
-+
-+  for(n = 0; n < tree->numcodes; ++n) /*the codes*/
-+  {
-+    for(i = 0; i != tree->lengths[n]; ++i) /*the bits for this code*/
-+    {
-+      unsigned char bit = (unsigned char)((tree->tree1d[n] >> (tree->lengths[n] - i - 1)) & 1);
-+      /*oversubscribed, see comment in lodepng_error_text*/
-+      if(treepos > 2147483647 || treepos + 2 > tree->numcodes) return 55;
-+      if(tree->tree2d[2 * treepos + bit] == 32767) /*not yet filled in*/
-+      {
-+        if(i + 1 == tree->lengths[n]) /*last bit*/
-+        {
-+          tree->tree2d[2 * treepos + bit] = n; /*put the current code in it*/
-+          treepos = 0;
-+        }
-+        else
-+        {
-+          /*put address of the next step in here, first that address has to be found of course
-+          (it's just nodefilled + 1)...*/
-+          ++nodefilled;
-+          /*addresses encoded with numcodes added to it*/
-+          tree->tree2d[2 * treepos + bit] = nodefilled + tree->numcodes;
-+          treepos = nodefilled;
-+        }
-+      }
-+      else treepos = tree->tree2d[2 * treepos + bit] - tree->numcodes;
-+    }
-+  }
-+
-+  for(n = 0; n < tree->numcodes * 2; ++n)
-+  {
-+    if(tree->tree2d[n] == 32767) tree->tree2d[n] = 0; /*remove possible remaining 32767's*/
-+  }
-+
-+  return 0;
-+}
-+
-+/*
-+Second step for the ...makeFromLengths and ...makeFromFrequencies functions.
-+numcodes, lengths and maxbitlen must already be filled in correctly. return
-+value is error.
-+*/
-+static unsigned HuffmanTree_makeFromLengths2(HuffmanTree* tree)
-+{
-+  uivector blcount;
-+  uivector nextcode;
-+  unsigned error = 0;
-+  unsigned bits, n;
-+
-+  uivector_init(&blcount);
-+  uivector_init(&nextcode);
-+
-+  tree->tree1d = (unsigned*)lodepng_malloc(tree->numcodes * sizeof(unsigned));
-+  if(!tree->tree1d) error = 83; /*alloc fail*/
-+
-+  if(!uivector_resizev(&blcount, tree->maxbitlen + 1, 0)
-+  || !uivector_resizev(&nextcode, tree->maxbitlen + 1, 0))
-+    error = 83; /*alloc fail*/
-+
-+  if(!error)
-+  {
-+    /*step 1: count number of instances of each code length*/
-+    for(bits = 0; bits != tree->numcodes; ++bits) ++blcount.data[tree->lengths[bits]];
-+    /*step 2: generate the nextcode values*/
-+    for(bits = 1; bits <= tree->maxbitlen; ++bits)
-+    {
-+      nextcode.data[bits] = (nextcode.data[bits - 1] + blcount.data[bits - 1]) << 1;
-+    }
-+    /*step 3: generate all the codes*/
-+    for(n = 0; n != tree->numcodes; ++n)
-+    {
-+      if(tree->lengths[n] != 0) tree->tree1d[n] = nextcode.data[tree->lengths[n]]++;
-+    }
-+  }
-+
-+  uivector_cleanup(&blcount);
-+  uivector_cleanup(&nextcode);
-+
-+  if(!error) return HuffmanTree_make2DTree(tree);
-+  else return error;
-+}
-+
-+/*
-+given the code lengths (as stored in the PNG file), generate the tree as defined
-+by Deflate. maxbitlen is the maximum bits that a code in the tree can have.
-+return value is error.
-+*/
-+static unsigned HuffmanTree_makeFromLengths(HuffmanTree* tree, const unsigned* bitlen,
-+                                            size_t numcodes, unsigned maxbitlen)
-+{
-+  unsigned i;
-+  tree->lengths = (unsigned*)lodepng_malloc(numcodes * sizeof(unsigned));
-+  if(!tree->lengths) return 83; /*alloc fail*/
-+  for(i = 0; i != numcodes; ++i) tree->lengths[i] = bitlen[i];
-+  tree->numcodes = (unsigned)numcodes; /*number of symbols*/
-+  tree->maxbitlen = maxbitlen;
-+  return HuffmanTree_makeFromLengths2(tree);
-+}
-+
-+#ifdef LODEPNG_COMPILE_ENCODER
-+
-+/*BPM: Boundary Package Merge, see "A Fast and Space-Economical Algorithm for Length-Limited Coding",
-+Jyrki Katajainen, Alistair Moffat, Andrew Turpin, 1995.*/
-+
-+/*chain node for boundary package merge*/
-+typedef struct BPMNode
-+{
-+  int weight; /*the sum of all weights in this chain*/
-+  unsigned index; /*index of this leaf node (called "count" in the paper)*/
-+  struct BPMNode* tail; /*the next nodes in this chain (null if last)*/
-+  int in_use;
-+} BPMNode;
-+
-+/*lists of chains*/
-+typedef struct BPMLists
-+{
-+  /*memory pool*/
-+  unsigned memsize;
-+  BPMNode* memory;
-+  unsigned numfree;
-+  unsigned nextfree;
-+  BPMNode** freelist;
-+  /*two heads of lookahead chains per list*/
-+  unsigned listsize;
-+  BPMNode** chains0;
-+  BPMNode** chains1;
-+} BPMLists;
-+
-+/*creates a new chain node with the given parameters, from the memory in the lists */
-+static BPMNode* bpmnode_create(BPMLists* lists, int weight, unsigned index, BPMNode* tail)
-+{
-+  unsigned i;
-+  BPMNode* result;
-+
-+  /*memory full, so garbage collect*/
-+  if(lists->nextfree >= lists->numfree)
-+  {
-+    /*mark only those that are in use*/
-+    for(i = 0; i != lists->memsize; ++i) lists->memory[i].in_use = 0;
-+    for(i = 0; i != lists->listsize; ++i)
-+    {
-+      BPMNode* node;
-+      for(node = lists->chains0[i]; node != 0; node = node->tail) node->in_use = 1;
-+      for(node = lists->chains1[i]; node != 0; node = node->tail) node->in_use = 1;
-+    }
-+    /*collect those that are free*/
-+    lists->numfree = 0;
-+    for(i = 0; i != lists->memsize; ++i)
-+    {
-+      if(!lists->memory[i].in_use) lists->freelist[lists->numfree++] = &lists->memory[i];
-+    }
-+    lists->nextfree = 0;
-+  }
-+
-+  result = lists->freelist[lists->nextfree++];
-+  result->weight = weight;
-+  result->index = index;
-+  result->tail = tail;
-+  return result;
-+}
-+
-+/*sort the leaves with stable mergesort*/
-+static void bpmnode_sort(BPMNode* leaves, size_t num)
-+{
-+  BPMNode* mem = (BPMNode*)lodepng_malloc(sizeof(*leaves) * num);
-+  size_t width, counter = 0;
-+  for(width = 1; width < num; width *= 2)
-+  {
-+    BPMNode* a = (counter & 1) ? mem : leaves;
-+    BPMNode* b = (counter & 1) ? leaves : mem;
-+    size_t p;
-+    for(p = 0; p < num; p += 2 * width)
-+    {
-+      size_t q = (p + width > num) ? num : (p + width);
-+      size_t r = (p + 2 * width > num) ? num : (p + 2 * width);
-+      size_t i = p, j = q, k;
-+      for(k = p; k < r; k++)
-+      {
-+        if(i < q && (j >= r || a[i].weight <= a[j].weight)) b[k] = a[i++];
-+        else b[k] = a[j++];
-+      }
-+    }
-+    counter++;
-+  }
-+  if(counter & 1) memcpy(leaves, mem, sizeof(*leaves) * num);
-+  lodepng_free(mem);
-+}
-+
-+/*Boundary Package Merge step, numpresent is the amount of leaves, and c is the current chain.*/
-+static void boundaryPM(BPMLists* lists, BPMNode* leaves, size_t numpresent, int c, int num)
-+{
-+  unsigned lastindex = lists->chains1[c]->index;
-+
-+  if(c == 0)
-+  {
-+    if(lastindex >= numpresent) return;
-+    lists->chains0[c] = lists->chains1[c];
-+    lists->chains1[c] = bpmnode_create(lists, leaves[lastindex].weight, lastindex + 1, 0);
-+  }
-+  else
-+  {
-+    /*sum of the weights of the head nodes of the previous lookahead chains.*/
-+    int sum = lists->chains0[c - 1]->weight + lists->chains1[c - 1]->weight;
-+    lists->chains0[c] = lists->chains1[c];
-+    if(lastindex < numpresent && sum > leaves[lastindex].weight)
-+    {
-+      lists->chains1[c] = bpmnode_create(lists, leaves[lastindex].weight, lastindex + 1, lists->chains1[c]->tail);
-+      return;
-+    }
-+    lists->chains1[c] = bpmnode_create(lists, sum, lastindex, lists->chains1[c - 1]);
-+    /*in the end we are only interested in the chain of the last list, so no
-+    need to recurse if we're at the last one (this gives measurable speedup)*/
-+    if(num + 1 < (int)(2 * numpresent - 2))
-+    {
-+      boundaryPM(lists, leaves, numpresent, c - 1, num);
-+      boundaryPM(lists, leaves, numpresent, c - 1, num);
-+    }
-+  }
-+}
-+
-+unsigned lodepng_huffman_code_lengths(unsigned* lengths, const unsigned* frequencies,
-+                                      size_t numcodes, unsigned maxbitlen)
-+{
-+  unsigned error = 0;
-+  unsigned i;
-+  size_t numpresent = 0; /*number of symbols with non-zero frequency*/
-+  BPMNode* leaves; /*the symbols, only those with > 0 frequency*/
-+
-+  if(numcodes == 0) return 80; /*error: a tree of 0 symbols is not supposed to be made*/
-+  if((1u << maxbitlen) < numcodes) return 80; /*error: represent all symbols*/
-+
-+  leaves = (BPMNode*)lodepng_malloc(numcodes * sizeof(*leaves));
-+  if(!leaves) return 83; /*alloc fail*/
-+
-+  for(i = 0; i != numcodes; ++i)
-+  {
-+    if(frequencies[i] > 0)
-+    {
-+      leaves[numpresent].weight = (int)frequencies[i];
-+      leaves[numpresent].index = i;
-+      ++numpresent;
-+    }
-+  }
-+
-+  for(i = 0; i != numcodes; ++i) lengths[i] = 0;
-+
-+  /*ensure at least two present symbols. There should be at least one symbol
-+  according to RFC 1951 section 3.2.7. Some decoders incorrectly require two. To
-+  make these work as well ensure there are at least two symbols. The
-+  Package-Merge code below also doesn't work correctly if there's only one
-+  symbol, it'd give it the theoritical 0 bits but in practice zlib wants 1 bit*/
-+  if(numpresent == 0)
-+  {
-+    lengths[0] = lengths[1] = 1; /*note that for RFC 1951 section 3.2.7, only lengths[0] = 1 is needed*/
-+  }
-+  else if(numpresent == 1)
-+  {
-+    lengths[leaves[0].index] = 1;
-+    lengths[leaves[0].index == 0 ? 1 : 0] = 1;
-+  }
-+  else
-+  {
-+    BPMLists lists;
-+    BPMNode* node;
-+
-+    bpmnode_sort(leaves, numpresent);
-+
-+    lists.listsize = maxbitlen;
-+    lists.memsize = 2 * maxbitlen * (maxbitlen + 1);
-+    lists.nextfree = 0;
-+    lists.numfree = lists.memsize;
-+    lists.memory = (BPMNode*)lodepng_malloc(lists.memsize * sizeof(*lists.memory));
-+    lists.freelist = (BPMNode**)lodepng_malloc(lists.memsize * sizeof(BPMNode*));
-+    lists.chains0 = (BPMNode**)lodepng_malloc(lists.listsize * sizeof(BPMNode*));
-+    lists.chains1 = (BPMNode**)lodepng_malloc(lists.listsize * sizeof(BPMNode*));
-+    if(!lists.memory || !lists.freelist || !lists.chains0 || !lists.chains1) error = 83; /*alloc fail*/
-+
-+    if(!error)
-+    {
-+      for(i = 0; i != lists.memsize; ++i) lists.freelist[i] = &lists.memory[i];
-+
-+      bpmnode_create(&lists, leaves[0].weight, 1, 0);
-+      bpmnode_create(&lists, leaves[1].weight, 2, 0);
-+
-+      for(i = 0; i != lists.listsize; ++i)
-+      {
-+        lists.chains0[i] = &lists.memory[0];
-+        lists.chains1[i] = &lists.memory[1];
-+      }
-+
-+      /*each boundaryPM call adds one chain to the last list, and we need 2 * numpresent - 2 chains.*/
-+      for(i = 2; i != 2 * numpresent - 2; ++i) boundaryPM(&lists, leaves, numpresent, (int)maxbitlen - 1, (int)i);
-+
-+      for(node = lists.chains1[maxbitlen - 1]; node; node = node->tail)
-+      {
-+        for(i = 0; i != node->index; ++i) ++lengths[leaves[i].index];
-+      }
-+    }
-+
-+    lodepng_free(lists.memory);
-+    lodepng_free(lists.freelist);
-+    lodepng_free(lists.chains0);
-+    lodepng_free(lists.chains1);
-+  }
-+
-+  lodepng_free(leaves);
-+  return error;
-+}
-+
-+/*Create the Huffman tree given the symbol frequencies*/
-+static unsigned HuffmanTree_makeFromFrequencies(HuffmanTree* tree, const unsigned* frequencies,
-+                                                size_t mincodes, size_t numcodes, unsigned maxbitlen)
-+{
-+  unsigned error = 0;
-+  while(!frequencies[numcodes - 1] && numcodes > mincodes) --numcodes; /*trim zeroes*/
-+  tree->maxbitlen = maxbitlen;
-+  tree->numcodes = (unsigned)numcodes; /*number of symbols*/
-+  tree->lengths = (unsigned*)lodepng_realloc(tree->lengths, numcodes * sizeof(unsigned));
-+  if(!tree->lengths) return 83; /*alloc fail*/
-+  /*initialize all lengths to 0*/
-+  memset(tree->lengths, 0, numcodes * sizeof(unsigned));
-+
-+  error = lodepng_huffman_code_lengths(tree->lengths, frequencies, numcodes, maxbitlen);
-+  if(!error) error = HuffmanTree_makeFromLengths2(tree);
-+  return error;
-+}
-+
-+static unsigned HuffmanTree_getCode(const HuffmanTree* tree, unsigned index)
-+{
-+  return tree->tree1d[index];
-+}
-+
-+static unsigned HuffmanTree_getLength(const HuffmanTree* tree, unsigned index)
-+{
-+  return tree->lengths[index];
-+}
-+#endif /*LODEPNG_COMPILE_ENCODER*/
-+
-+/*get the literal and length code tree of a deflated block with fixed tree, as per the deflate specification*/
-+static unsigned generateFixedLitLenTree(HuffmanTree* tree)
-+{
-+  unsigned i, error = 0;
-+  unsigned* bitlen = (unsigned*)lodepng_malloc(NUM_DEFLATE_CODE_SYMBOLS * sizeof(unsigned));
-+  if(!bitlen) return 83; /*alloc fail*/
-+
-+  /*288 possible codes: 0-255=literals, 256=endcode, 257-285=lengthcodes, 286-287=unused*/
-+  for(i =   0; i <= 143; ++i) bitlen[i] = 8;
-+  for(i = 144; i <= 255; ++i) bitlen[i] = 9;
-+  for(i = 256; i <= 279; ++i) bitlen[i] = 7;
-+  for(i = 280; i <= 287; ++i) bitlen[i] = 8;
-+
-+  error = HuffmanTree_makeFromLengths(tree, bitlen, NUM_DEFLATE_CODE_SYMBOLS, 15);
-+
-+  lodepng_free(bitlen);
-+  return error;
-+}
-+
-+/*get the distance code tree of a deflated block with fixed tree, as specified in the deflate specification*/
-+static unsigned generateFixedDistanceTree(HuffmanTree* tree)
-+{
-+  unsigned i, error = 0;
-+  unsigned* bitlen = (unsigned*)lodepng_malloc(NUM_DISTANCE_SYMBOLS * sizeof(unsigned));
-+  if(!bitlen) return 83; /*alloc fail*/
-+
-+  /*there are 32 distance codes, but 30-31 are unused*/
-+  for(i = 0; i != NUM_DISTANCE_SYMBOLS; ++i) bitlen[i] = 5;
-+  error = HuffmanTree_makeFromLengths(tree, bitlen, NUM_DISTANCE_SYMBOLS, 15);
-+
-+  lodepng_free(bitlen);
-+  return error;
-+}
-+
-+#ifdef LODEPNG_COMPILE_DECODER
-+
-+/*
-+returns the code, or (unsigned)(-1) if error happened
-+inbitlength is the length of the complete buffer, in bits (so its byte length times 8)
-+*/
-+static unsigned huffmanDecodeSymbol(const unsigned char* in, size_t* bp,
-+                                    const HuffmanTree* codetree, size_t inbitlength)
-+{
-+  unsigned treepos = 0, ct;
-+  for(;;)
-+  {
-+    if(*bp >= inbitlength) return (unsigned)(-1); /*error: end of input memory reached without endcode*/
-+    /*
-+    decode the symbol from the tree. The "readBitFromStream" code is inlined in
-+    the expression below because this is the biggest bottleneck while decoding
-+    */
-+    ct = codetree->tree2d[(treepos << 1) + READBIT(*bp, in)];
-+    ++(*bp);
-+    if(ct < codetree->numcodes) return ct; /*the symbol is decoded, return it*/
-+    else treepos = ct - codetree->numcodes; /*symbol not yet decoded, instead move tree position*/
-+
-+    if(treepos >= codetree->numcodes) return (unsigned)(-1); /*error: it appeared outside the codetree*/
-+  }
-+}
-+#endif /*LODEPNG_COMPILE_DECODER*/
-+
-+#ifdef LODEPNG_COMPILE_DECODER
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* / Inflator (Decompressor)                                                / */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+/*get the tree of a deflated block with fixed tree, as specified in the deflate specification*/
-+static void getTreeInflateFixed(HuffmanTree* tree_ll, HuffmanTree* tree_d)
-+{
-+  /*TODO: check for out of memory errors*/
-+  generateFixedLitLenTree(tree_ll);
-+  generateFixedDistanceTree(tree_d);
-+}
-+
-+/*get the tree of a deflated block with dynamic tree, the tree itself is also Huffman compressed with a known tree*/
-+static unsigned getTreeInflateDynamic(HuffmanTree* tree_ll, HuffmanTree* tree_d,
-+                                      const unsigned char* in, size_t* bp, size_t inlength)
-+{
-+  /*make sure that length values that aren't filled in will be 0, or a wrong tree will be generated*/
-+  unsigned error = 0;
-+  unsigned n, HLIT, HDIST, HCLEN, i;
-+  size_t inbitlength = inlength * 8;
-+
-+  /*see comments in deflateDynamic for explanation of the context and these variables, it is analogous*/
-+  unsigned* bitlen_ll = 0; /*lit,len code lengths*/
-+  unsigned* bitlen_d = 0; /*dist code lengths*/
-+  /*code length code lengths ("clcl"), the bit lengths of the huffman tree used to compress bitlen_ll and bitlen_d*/
-+  unsigned* bitlen_cl = 0;
-+  HuffmanTree tree_cl; /*the code tree for code length codes (the huffman tree for compressed huffman trees)*/
-+
-+  if((*bp) + 14 > (inlength << 3)) return 49; /*error: the bit pointer is or will go past the memory*/
-+
-+  /*number of literal/length codes + 257. Unlike the spec, the value 257 is added to it here already*/
-+  HLIT =  readBitsFromStream(bp, in, 5) + 257;
-+  /*number of distance codes. Unlike the spec, the value 1 is added to it here already*/
-+  HDIST = readBitsFromStream(bp, in, 5) + 1;
-+  /*number of code length codes. Unlike the spec, the value 4 is added to it here already*/
-+  HCLEN = readBitsFromStream(bp, in, 4) + 4;
-+
-+  if((*bp) + HCLEN * 3 > (inlength << 3)) return 50; /*error: the bit pointer is or will go past the memory*/
-+
-+  HuffmanTree_init(&tree_cl);
-+
-+  while(!error)
-+  {
-+    /*read the code length codes out of 3 * (amount of code length codes) bits*/
-+
-+    bitlen_cl = (unsigned*)lodepng_malloc(NUM_CODE_LENGTH_CODES * sizeof(unsigned));
-+    if(!bitlen_cl) ERROR_BREAK(83 /*alloc fail*/);
-+
-+    for(i = 0; i != NUM_CODE_LENGTH_CODES; ++i)
-+    {
-+      if(i < HCLEN) bitlen_cl[CLCL_ORDER[i]] = readBitsFromStream(bp, in, 3);
-+      else bitlen_cl[CLCL_ORDER[i]] = 0; /*if not, it must stay 0*/
-+    }
-+
-+    error = HuffmanTree_makeFromLengths(&tree_cl, bitlen_cl, NUM_CODE_LENGTH_CODES, 7);
-+    if(error) break;
-+
-+    /*now we can use this tree to read the lengths for the tree that this function will return*/
-+    bitlen_ll = (unsigned*)lodepng_malloc(NUM_DEFLATE_CODE_SYMBOLS * sizeof(unsigned));
-+    bitlen_d = (unsigned*)lodepng_malloc(NUM_DISTANCE_SYMBOLS * sizeof(unsigned));
-+    if(!bitlen_ll || !bitlen_d) ERROR_BREAK(83 /*alloc fail*/);
-+    for(i = 0; i != NUM_DEFLATE_CODE_SYMBOLS; ++i) bitlen_ll[i] = 0;
-+    for(i = 0; i != NUM_DISTANCE_SYMBOLS; ++i) bitlen_d[i] = 0;
-+
-+    /*i is the current symbol we're reading in the part that contains the code lengths of lit/len and dist codes*/
-+    i = 0;
-+    while(i < HLIT + HDIST)
-+    {
-+      unsigned code = huffmanDecodeSymbol(in, bp, &tree_cl, inbitlength);
-+      if(code <= 15) /*a length code*/
-+      {
-+        if(i < HLIT) bitlen_ll[i] = code;
-+        else bitlen_d[i - HLIT] = code;
-+        ++i;
-+      }
-+      else if(code == 16) /*repeat previous*/
-+      {
-+        unsigned replength = 3; /*read in the 2 bits that indicate repeat length (3-6)*/
-+        unsigned value; /*set value to the previous code*/
-+
-+        if(i == 0) ERROR_BREAK(54); /*can't repeat previous if i is 0*/
-+
-+        if((*bp + 2) > inbitlength) ERROR_BREAK(50); /*error, bit pointer jumps past memory*/
-+        replength += readBitsFromStream(bp, in, 2);
-+
-+        if(i < HLIT + 1) value = bitlen_ll[i - 1];
-+        else value = bitlen_d[i - HLIT - 1];
-+        /*repeat this value in the next lengths*/
-+        for(n = 0; n < replength; ++n)
-+        {
-+          if(i >= HLIT + HDIST) ERROR_BREAK(13); /*error: i is larger than the amount of codes*/
-+          if(i < HLIT) bitlen_ll[i] = value;
-+          else bitlen_d[i - HLIT] = value;
-+          ++i;
-+        }
-+      }
-+      else if(code == 17) /*repeat "0" 3-10 times*/
-+      {
-+        unsigned replength = 3; /*read in the bits that indicate repeat length*/
-+        if((*bp + 3) > inbitlength) ERROR_BREAK(50); /*error, bit pointer jumps past memory*/
-+        replength += readBitsFromStream(bp, in, 3);
-+
-+        /*repeat this value in the next lengths*/
-+        for(n = 0; n < replength; ++n)
-+        {
-+          if(i >= HLIT + HDIST) ERROR_BREAK(14); /*error: i is larger than the amount of codes*/
-+
-+          if(i < HLIT) bitlen_ll[i] = 0;
-+          else bitlen_d[i - HLIT] = 0;
-+          ++i;
-+        }
-+      }
-+      else if(code == 18) /*repeat "0" 11-138 times*/
-+      {
-+        unsigned replength = 11; /*read in the bits that indicate repeat length*/
-+        if((*bp + 7) > inbitlength) ERROR_BREAK(50); /*error, bit pointer jumps past memory*/
-+        replength += readBitsFromStream(bp, in, 7);
-+
-+        /*repeat this value in the next lengths*/
-+        for(n = 0; n < replength; ++n)
-+        {
-+          if(i >= HLIT + HDIST) ERROR_BREAK(15); /*error: i is larger than the amount of codes*/
-+
-+          if(i < HLIT) bitlen_ll[i] = 0;
-+          else bitlen_d[i - HLIT] = 0;
-+          ++i;
-+        }
-+      }
-+      else /*if(code == (unsigned)(-1))*/ /*huffmanDecodeSymbol returns (unsigned)(-1) in case of error*/
-+      {
-+        if(code == (unsigned)(-1))
-+        {
-+          /*return error code 10 or 11 depending on the situation that happened in huffmanDecodeSymbol
-+          (10=no endcode, 11=wrong jump outside of tree)*/
-+          error = (*bp) > inbitlength ? 10 : 11;
-+        }
-+        else error = 16; /*unexisting code, this can never happen*/
-+        break;
-+      }
-+    }
-+    if(error) break;
-+
-+    if(bitlen_ll[256] == 0) ERROR_BREAK(64); /*the length of the end code 256 must be larger than 0*/
-+
-+    /*now we've finally got HLIT and HDIST, so generate the code trees, and the function is done*/
-+    error = HuffmanTree_makeFromLengths(tree_ll, bitlen_ll, NUM_DEFLATE_CODE_SYMBOLS, 15);
-+    if(error) break;
-+    error = HuffmanTree_makeFromLengths(tree_d, bitlen_d, NUM_DISTANCE_SYMBOLS, 15);
-+
-+    break; /*end of error-while*/
-+  }
-+
-+  lodepng_free(bitlen_cl);
-+  lodepng_free(bitlen_ll);
-+  lodepng_free(bitlen_d);
-+  HuffmanTree_cleanup(&tree_cl);
-+
-+  return error;
-+}
-+
-+/*inflate a block with dynamic of fixed Huffman tree*/
-+static unsigned inflateHuffmanBlock(ucvector* out, const unsigned char* in, size_t* bp,
-+                                    size_t* pos, size_t inlength, unsigned btype)
-+{
-+  unsigned error = 0;
-+  HuffmanTree tree_ll; /*the huffman tree for literal and length codes*/
-+  HuffmanTree tree_d; /*the huffman tree for distance codes*/
-+  size_t inbitlength = inlength * 8;
-+
-+  HuffmanTree_init(&tree_ll);
-+  HuffmanTree_init(&tree_d);
-+
-+  if(btype == 1) getTreeInflateFixed(&tree_ll, &tree_d);
-+  else if(btype == 2) error = getTreeInflateDynamic(&tree_ll, &tree_d, in, bp, inlength);
-+
-+  while(!error) /*decode all symbols until end reached, breaks at end code*/
-+  {
-+    /*code_ll is literal, length or end code*/
-+    unsigned code_ll = huffmanDecodeSymbol(in, bp, &tree_ll, inbitlength);
-+    if(code_ll <= 255) /*literal symbol*/
-+    {
-+      /*ucvector_push_back would do the same, but for some reason the two lines below run 10% faster*/
-+      if(!ucvector_resize(out, (*pos) + 1)) ERROR_BREAK(83 /*alloc fail*/);
-+      out->data[*pos] = (unsigned char)code_ll;
-+      ++(*pos);
-+    }
-+    else if(code_ll >= FIRST_LENGTH_CODE_INDEX && code_ll <= LAST_LENGTH_CODE_INDEX) /*length code*/
-+    {
-+      unsigned code_d, distance;
-+      unsigned numextrabits_l, numextrabits_d; /*extra bits for length and distance*/
-+      size_t start, forward, backward, length;
-+
-+      /*part 1: get length base*/
-+      length = LENGTHBASE[code_ll - FIRST_LENGTH_CODE_INDEX];
-+
-+      /*part 2: get extra bits and add the value of that to length*/
-+      numextrabits_l = LENGTHEXTRA[code_ll - FIRST_LENGTH_CODE_INDEX];
-+      if((*bp + numextrabits_l) > inbitlength) ERROR_BREAK(51); /*error, bit pointer will jump past memory*/
-+      length += readBitsFromStream(bp, in, numextrabits_l);
-+
-+      /*part 3: get distance code*/
-+      code_d = huffmanDecodeSymbol(in, bp, &tree_d, inbitlength);
-+      if(code_d > 29)
-+      {
-+        if(code_ll == (unsigned)(-1)) /*huffmanDecodeSymbol returns (unsigned)(-1) in case of error*/
-+        {
-+          /*return error code 10 or 11 depending on the situation that happened in huffmanDecodeSymbol
-+          (10=no endcode, 11=wrong jump outside of tree)*/
-+          error = (*bp) > inlength * 8 ? 10 : 11;
-+        }
-+        else error = 18; /*error: invalid distance code (30-31 are never used)*/
-+        break;
-+      }
-+      distance = DISTANCEBASE[code_d];
-+
-+      /*part 4: get extra bits from distance*/
-+      numextrabits_d = DISTANCEEXTRA[code_d];
-+      if((*bp + numextrabits_d) > inbitlength) ERROR_BREAK(51); /*error, bit pointer will jump past memory*/
-+      distance += readBitsFromStream(bp, in, numextrabits_d);
-+
-+      /*part 5: fill in all the out[n] values based on the length and dist*/
-+      start = (*pos);
-+      if(distance > start) ERROR_BREAK(52); /*too long backward distance*/
-+      backward = start - distance;
-+
-+      if(!ucvector_resize(out, (*pos) + length)) ERROR_BREAK(83 /*alloc fail*/);
-+      if (distance < length) {
-+        for(forward = 0; forward < length; ++forward)
-+        {
-+          out->data[(*pos)++] = out->data[backward++];
-+        }
-+      } else {
-+        memcpy(out->data + *pos, out->data + backward, length);
-+        *pos += length;
-+      }
-+    }
-+    else if(code_ll == 256)
-+    {
-+      break; /*end code, break the loop*/
-+    }
-+    else /*if(code == (unsigned)(-1))*/ /*huffmanDecodeSymbol returns (unsigned)(-1) in case of error*/
-+    {
-+      /*return error code 10 or 11 depending on the situation that happened in huffmanDecodeSymbol
-+      (10=no endcode, 11=wrong jump outside of tree)*/
-+      error = ((*bp) > inlength * 8) ? 10 : 11;
-+      break;
-+    }
-+  }
-+
-+  HuffmanTree_cleanup(&tree_ll);
-+  HuffmanTree_cleanup(&tree_d);
-+
-+  return error;
-+}
-+
-+static unsigned inflateNoCompression(ucvector* out, const unsigned char* in, size_t* bp, size_t* pos, size_t inlength)
-+{
-+  size_t p;
-+  unsigned LEN, NLEN, n, error = 0;
-+
-+  /*go to first boundary of byte*/
-+  while(((*bp) & 0x7) != 0) ++(*bp);
-+  p = (*bp) / 8; /*byte position*/
-+
-+  /*read LEN (2 bytes) and NLEN (2 bytes)*/
-+  if(p + 4 >= inlength) return 52; /*error, bit pointer will jump past memory*/
-+  LEN = in[p] + 256u * in[p + 1]; p += 2;
-+  NLEN = in[p] + 256u * in[p + 1]; p += 2;
-+
-+  /*check if 16-bit NLEN is really the one's complement of LEN*/
-+  if(LEN + NLEN != 65535) return 21; /*error: NLEN is not one's complement of LEN*/
-+
-+  if(!ucvector_resize(out, (*pos) + LEN)) return 83; /*alloc fail*/
-+
-+  /*read the literal data: LEN bytes are now stored in the out buffer*/
-+  if(p + LEN > inlength) return 23; /*error: reading outside of in buffer*/
-+  for(n = 0; n < LEN; ++n) out->data[(*pos)++] = in[p++];
-+
-+  (*bp) = p * 8;
-+
-+  return error;
-+}
-+
-+static unsigned lodepng_inflatev(ucvector* out,
-+                                 const unsigned char* in, size_t insize,
-+                                 const LodePNGDecompressSettings* settings)
-+{
-+  /*bit pointer in the "in" data, current byte is bp >> 3, current bit is bp & 0x7 (from lsb to msb of the byte)*/
-+  size_t bp = 0;
-+  unsigned BFINAL = 0;
-+  size_t pos = 0; /*byte position in the out buffer*/
-+  unsigned error = 0;
-+
-+  (void)settings;
-+
-+  while(!BFINAL)
-+  {
-+    unsigned BTYPE;
-+    if(bp + 2 >= insize * 8) return 52; /*error, bit pointer will jump past memory*/
-+    BFINAL = readBitFromStream(&bp, in);
-+    BTYPE = 1u * readBitFromStream(&bp, in);
-+    BTYPE += 2u * readBitFromStream(&bp, in);
-+
-+    if(BTYPE == 3) return 20; /*error: invalid BTYPE*/
-+    else if(BTYPE == 0) error = inflateNoCompression(out, in, &bp, &pos, insize); /*no compression*/
-+    else error = inflateHuffmanBlock(out, in, &bp, &pos, insize, BTYPE); /*compression, BTYPE 01 or 10*/
-+
-+    if(error) return error;
-+  }
-+
-+  return error;
-+}
-+
-+unsigned lodepng_inflate(unsigned char** out, size_t* outsize,
-+                         const unsigned char* in, size_t insize,
-+                         const LodePNGDecompressSettings* settings)
-+{
-+  unsigned error;
-+  ucvector v;
-+  ucvector_init_buffer(&v, *out, *outsize);
-+  error = lodepng_inflatev(&v, in, insize, settings);
-+  *out = v.data;
-+  *outsize = v.size;
-+  return error;
-+}
-+
-+static unsigned inflate(unsigned char** out, size_t* outsize,
-+                        const unsigned char* in, size_t insize,
-+                        const LodePNGDecompressSettings* settings)
-+{
-+  if(settings->custom_inflate)
-+  {
-+    return settings->custom_inflate(out, outsize, in, insize, settings);
-+  }
-+  else
-+  {
-+    return lodepng_inflate(out, outsize, in, insize, settings);
-+  }
-+}
-+
-+#endif /*LODEPNG_COMPILE_DECODER*/
-+
-+#ifdef LODEPNG_COMPILE_ENCODER
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* / Deflator (Compressor)                                                  / */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+static const size_t MAX_SUPPORTED_DEFLATE_LENGTH = 258;
-+
-+/*bitlen is the size in bits of the code*/
-+static void addHuffmanSymbol(size_t* bp, ucvector* compressed, unsigned code, unsigned bitlen)
-+{
-+  addBitsToStreamReversed(bp, compressed, code, bitlen);
-+}
-+
-+/*search the index in the array, that has the largest value smaller than or equal to the given value,
-+given array must be sorted (if no value is smaller, it returns the size of the given array)*/
-+static size_t searchCodeIndex(const unsigned* array, size_t array_size, size_t value)
-+{
-+  /*binary search (only small gain over linear). TODO: use CPU log2 instruction for getting symbols instead*/
-+  size_t left = 1;
-+  size_t right = array_size - 1;
-+
-+  while(left <= right) {
-+    size_t mid = (left + right) >> 1;
-+    if (array[mid] >= value) right = mid - 1;
-+    else left = mid + 1;
-+  }
-+  if(left >= array_size || array[left] > value) left--;
-+  return left;
-+}
-+
-+static void addLengthDistance(uivector* values, size_t length, size_t distance)
-+{
-+  /*values in encoded vector are those used by deflate:
-+  0-255: literal bytes
-+  256: end
-+  257-285: length/distance pair (length code, followed by extra length bits, distance code, extra distance bits)
-+  286-287: invalid*/
-+
-+  unsigned length_code = (unsigned)searchCodeIndex(LENGTHBASE, 29, length);
-+  unsigned extra_length = (unsigned)(length - LENGTHBASE[length_code]);
-+  unsigned dist_code = (unsigned)searchCodeIndex(DISTANCEBASE, 30, distance);
-+  unsigned extra_distance = (unsigned)(distance - DISTANCEBASE[dist_code]);
-+
-+  uivector_push_back(values, length_code + FIRST_LENGTH_CODE_INDEX);
-+  uivector_push_back(values, extra_length);
-+  uivector_push_back(values, dist_code);
-+  uivector_push_back(values, extra_distance);
-+}
-+
-+/*3 bytes of data get encoded into two bytes. The hash cannot use more than 3
-+bytes as input because 3 is the minimum match length for deflate*/
-+static const unsigned HASH_NUM_VALUES = 65536;
-+static const unsigned HASH_BIT_MASK = 65535; /*HASH_NUM_VALUES - 1, but C90 does not like that as initializer*/
-+
-+typedef struct Hash
-+{
-+  int* head; /*hash value to head circular pos - can be outdated if went around window*/
-+  /*circular pos to prev circular pos*/
-+  unsigned short* chain;
-+  int* val; /*circular pos to hash value*/
-+
-+  /*TODO: do this not only for zeros but for any repeated byte. However for PNG
-+  it's always going to be the zeros that dominate, so not important for PNG*/
-+  int* headz; /*similar to head, but for chainz*/
-+  unsigned short* chainz; /*those with same amount of zeros*/
-+  unsigned short* zeros; /*length of zeros streak, used as a second hash chain*/
-+} Hash;
-+
-+static unsigned hash_init(Hash* hash, unsigned windowsize)
-+{
-+  unsigned i;
-+  hash->head = (int*)lodepng_malloc(sizeof(int) * HASH_NUM_VALUES);
-+  hash->val = (int*)lodepng_malloc(sizeof(int) * windowsize);
-+  hash->chain = (unsigned short*)lodepng_malloc(sizeof(unsigned short) * windowsize);
-+
-+  hash->zeros = (unsigned short*)lodepng_malloc(sizeof(unsigned short) * windowsize);
-+  hash->headz = (int*)lodepng_malloc(sizeof(int) * (MAX_SUPPORTED_DEFLATE_LENGTH + 1));
-+  hash->chainz = (unsigned short*)lodepng_malloc(sizeof(unsigned short) * windowsize);
-+
-+  if(!hash->head || !hash->chain || !hash->val  || !hash->headz|| !hash->chainz || !hash->zeros)
-+  {
-+    return 83; /*alloc fail*/
-+  }
-+
-+  /*initialize hash table*/
-+  for(i = 0; i != HASH_NUM_VALUES; ++i) hash->head[i] = -1;
-+  for(i = 0; i != windowsize; ++i) hash->val[i] = -1;
-+  for(i = 0; i != windowsize; ++i) hash->chain[i] = i; /*same value as index indicates uninitialized*/
-+
-+  for(i = 0; i <= MAX_SUPPORTED_DEFLATE_LENGTH; ++i) hash->headz[i] = -1;
-+  for(i = 0; i != windowsize; ++i) hash->chainz[i] = i; /*same value as index indicates uninitialized*/
-+
-+  return 0;
-+}
-+
-+static void hash_cleanup(Hash* hash)
-+{
-+  lodepng_free(hash->head);
-+  lodepng_free(hash->val);
-+  lodepng_free(hash->chain);
-+
-+  lodepng_free(hash->zeros);
-+  lodepng_free(hash->headz);
-+  lodepng_free(hash->chainz);
-+}
-+
-+
-+
-+static unsigned getHash(const unsigned char* data, size_t size, size_t pos)
-+{
-+  unsigned result = 0;
-+  if(pos + 2 < size)
-+  {
-+    /*A simple shift and xor hash is used. Since the data of PNGs is dominated
-+    by zeroes due to the filters, a better hash does not have a significant
-+    effect on speed in traversing the chain, and causes more time spend on
-+    calculating the hash.*/
-+    result ^= (unsigned)(data[pos + 0] << 0u);
-+    result ^= (unsigned)(data[pos + 1] << 4u);
-+    result ^= (unsigned)(data[pos + 2] << 8u);
-+  } else {
-+    size_t amount, i;
-+    if(pos >= size) return 0;
-+    amount = size - pos;
-+    for(i = 0; i != amount; ++i) result ^= (unsigned)(data[pos + i] << (i * 8u));
-+  }
-+  return result & HASH_BIT_MASK;
-+}
-+
-+static unsigned countZeros(const unsigned char* data, size_t size, size_t pos)
-+{
-+  const unsigned char* start = data + pos;
-+  const unsigned char* end = start + MAX_SUPPORTED_DEFLATE_LENGTH;
-+  if(end > data + size) end = data + size;
-+  data = start;
-+  while(data != end && *data == 0) ++data;
-+  /*subtracting two addresses returned as 32-bit number (max value is MAX_SUPPORTED_DEFLATE_LENGTH)*/
-+  return (unsigned)(data - start);
-+}
-+
-+/*wpos = pos & (windowsize - 1)*/
-+static void updateHashChain(Hash* hash, size_t wpos, unsigned hashval, unsigned short numzeros)
-+{
-+  hash->val[wpos] = (int)hashval;
-+  if(hash->head[hashval] != -1) hash->chain[wpos] = hash->head[hashval];
-+  hash->head[hashval] = wpos;
-+
-+  hash->zeros[wpos] = numzeros;
-+  if(hash->headz[numzeros] != -1) hash->chainz[wpos] = hash->headz[numzeros];
-+  hash->headz[numzeros] = wpos;
-+}
-+
-+/*
-+LZ77-encode the data. Return value is error code. The input are raw bytes, the output
-+is in the form of unsigned integers with codes representing for example literal bytes, or
-+length/distance pairs.
-+It uses a hash table technique to let it encode faster. When doing LZ77 encoding, a
-+sliding window (of windowsize) is used, and all past bytes in that window can be used as
-+the "dictionary". A brute force search through all possible distances would be slow, and
-+this hash technique is one out of several ways to speed this up.
-+*/
-+static unsigned encodeLZ77(uivector* out, Hash* hash,
-+                           const unsigned char* in, size_t inpos, size_t insize, unsigned windowsize,
-+                           unsigned minmatch, unsigned nicematch, unsigned lazymatching)
-+{
-+  size_t pos;
-+  unsigned i, error = 0;
-+  /*for large window lengths, assume the user wants no compression loss. Otherwise, max hash chain length speedup.*/
-+  unsigned maxchainlength = windowsize >= 8192 ? windowsize : windowsize / 8;
-+  unsigned maxlazymatch = windowsize >= 8192 ? MAX_SUPPORTED_DEFLATE_LENGTH : 64;
-+
-+  unsigned usezeros = 1; /*not sure if setting it to false for windowsize < 8192 is better or worse*/
-+  unsigned numzeros = 0;
-+
-+  unsigned offset; /*the offset represents the distance in LZ77 terminology*/
-+  unsigned length;
-+  unsigned lazy = 0;
-+  unsigned lazylength = 0, lazyoffset = 0;
-+  unsigned hashval;
-+  unsigned current_offset, current_length;
-+  unsigned prev_offset;
-+  const unsigned char *lastptr, *foreptr, *backptr;
-+  unsigned hashpos;
-+
-+  if(windowsize == 0 || windowsize > 32768) return 60; /*error: windowsize smaller/larger than allowed*/
-+  if((windowsize & (windowsize - 1)) != 0) return 90; /*error: must be power of two*/
-+
-+  if(nicematch > MAX_SUPPORTED_DEFLATE_LENGTH) nicematch = MAX_SUPPORTED_DEFLATE_LENGTH;
-+
-+  for(pos = inpos; pos < insize; ++pos)
-+  {
-+    size_t wpos = pos & (windowsize - 1); /*position for in 'circular' hash buffers*/
-+    unsigned chainlength = 0;
-+
-+    hashval = getHash(in, insize, pos);
-+
-+    if(usezeros && hashval == 0)
-+    {
-+      if(numzeros == 0) numzeros = countZeros(in, insize, pos);
-+      else if(pos + numzeros > insize || in[pos + numzeros - 1] != 0) --numzeros;
-+    }
-+    else
-+    {
-+      numzeros = 0;
-+    }
-+
-+    updateHashChain(hash, wpos, hashval, numzeros);
-+
-+    /*the length and offset found for the current position*/
-+    length = 0;
-+    offset = 0;
-+
-+    hashpos = hash->chain[wpos];
-+
-+    lastptr = &in[insize < pos + MAX_SUPPORTED_DEFLATE_LENGTH ? insize : pos + MAX_SUPPORTED_DEFLATE_LENGTH];
-+
-+    /*search for the longest string*/
-+    prev_offset = 0;
-+    for(;;)
-+    {
-+      if(chainlength++ >= maxchainlength) break;
-+      current_offset = hashpos <= wpos ? wpos - hashpos : wpos - hashpos + windowsize;
-+
-+      if(current_offset < prev_offset) break; /*stop when went completely around the circular buffer*/
-+      prev_offset = current_offset;
-+      if(current_offset > 0)
-+      {
-+        /*test the next characters*/
-+        foreptr = &in[pos];
-+        backptr = &in[pos - current_offset];
-+
-+        /*common case in PNGs is lots of zeros. Quickly skip over them as a speedup*/
-+        if(numzeros >= 3)
-+        {
-+          unsigned skip = hash->zeros[hashpos];
-+          if(skip > numzeros) skip = numzeros;
-+          backptr += skip;
-+          foreptr += skip;
-+        }
-+
-+        while(foreptr != lastptr && *backptr == *foreptr) /*maximum supported length by deflate is max length*/
-+        {
-+          ++backptr;
-+          ++foreptr;
-+        }
-+        current_length = (unsigned)(foreptr - &in[pos]);
-+
-+        if(current_length > length)
-+        {
-+          length = current_length; /*the longest length*/
-+          offset = current_offset; /*the offset that is related to this longest length*/
-+          /*jump out once a length of max length is found (speed gain). This also jumps
-+          out if length is MAX_SUPPORTED_DEFLATE_LENGTH*/
-+          if(current_length >= nicematch) break;
-+        }
-+      }
-+
-+      if(hashpos == hash->chain[hashpos]) break;
-+
-+      if(numzeros >= 3 && length > numzeros)
-+      {
-+        hashpos = hash->chainz[hashpos];
-+        if(hash->zeros[hashpos] != numzeros) break;
-+      }
-+      else
-+      {
-+        hashpos = hash->chain[hashpos];
-+        /*outdated hash value, happens if particular value was not encountered in whole last window*/
-+        if(hash->val[hashpos] != (int)hashval) break;
-+      }
-+    }
-+
-+    if(lazymatching)
-+    {
-+      if(!lazy && length >= 3 && length <= maxlazymatch && length < MAX_SUPPORTED_DEFLATE_LENGTH)
-+      {
-+        lazy = 1;
-+        lazylength = length;
-+        lazyoffset = offset;
-+        continue; /*try the next byte*/
-+      }
-+      if(lazy)
-+      {
-+        lazy = 0;
-+        if(pos == 0) ERROR_BREAK(81);
-+        if(length > lazylength + 1)
-+        {
-+          /*push the previous character as literal*/
-+          if(!uivector_push_back(out, in[pos - 1])) ERROR_BREAK(83 /*alloc fail*/);
-+        }
-+        else
-+        {
-+          length = lazylength;
-+          offset = lazyoffset;
-+          hash->head[hashval] = -1; /*the same hashchain update will be done, this ensures no wrong alteration*/
-+          hash->headz[numzeros] = -1; /*idem*/
-+          --pos;
-+        }
-+      }
-+    }
-+    if(length >= 3 && offset > windowsize) ERROR_BREAK(86 /*too big (or overflown negative) offset*/);
-+
-+    /*encode it as length/distance pair or literal value*/
-+    if(length < 3) /*only lengths of 3 or higher are supported as length/distance pair*/
-+    {
-+      if(!uivector_push_back(out, in[pos])) ERROR_BREAK(83 /*alloc fail*/);
-+    }
-+    else if(length < minmatch || (length == 3 && offset > 4096))
-+    {
-+      /*compensate for the fact that longer offsets have more extra bits, a
-+      length of only 3 may be not worth it then*/
-+      if(!uivector_push_back(out, in[pos])) ERROR_BREAK(83 /*alloc fail*/);
-+    }
-+    else
-+    {
-+      addLengthDistance(out, length, offset);
-+      for(i = 1; i < length; ++i)
-+      {
-+        ++pos;
-+        wpos = pos & (windowsize - 1);
-+        hashval = getHash(in, insize, pos);
-+        if(usezeros && hashval == 0)
-+        {
-+          if(numzeros == 0) numzeros = countZeros(in, insize, pos);
-+          else if(pos + numzeros > insize || in[pos + numzeros - 1] != 0) --numzeros;
-+        }
-+        else
-+        {
-+          numzeros = 0;
-+        }
-+        updateHashChain(hash, wpos, hashval, numzeros);
-+      }
-+    }
-+  } /*end of the loop through each character of input*/
-+
-+  return error;
-+}
-+
-+/* /////////////////////////////////////////////////////////////////////////// */
-+
-+static unsigned deflateNoCompression(ucvector* out, const unsigned char* data, size_t datasize)
-+{
-+  /*non compressed deflate block data: 1 bit BFINAL,2 bits BTYPE,(5 bits): it jumps to start of next byte,
-+  2 bytes LEN, 2 bytes NLEN, LEN bytes literal DATA*/
-+
-+  size_t i, j, numdeflateblocks = (datasize + 65534) / 65535;
-+  unsigned datapos = 0;
-+  for(i = 0; i != numdeflateblocks; ++i)
-+  {
-+    unsigned BFINAL, BTYPE, LEN, NLEN;
-+    unsigned char firstbyte;
-+
-+    BFINAL = (i == numdeflateblocks - 1);
-+    BTYPE = 0;
-+
-+    firstbyte = (unsigned char)(BFINAL + ((BTYPE & 1) << 1) + ((BTYPE & 2) << 1));
-+    ucvector_push_back(out, firstbyte);
-+
-+    LEN = 65535;
-+    if(datasize - datapos < 65535) LEN = (unsigned)datasize - datapos;
-+    NLEN = 65535 - LEN;
-+
-+    ucvector_push_back(out, (unsigned char)(LEN & 255));
-+    ucvector_push_back(out, (unsigned char)(LEN >> 8));
-+    ucvector_push_back(out, (unsigned char)(NLEN & 255));
-+    ucvector_push_back(out, (unsigned char)(NLEN >> 8));
-+
-+    /*Decompressed data*/
-+    for(j = 0; j < 65535 && datapos < datasize; ++j)
-+    {
-+      ucvector_push_back(out, data[datapos++]);
-+    }
-+  }
-+
-+  return 0;
-+}
-+
-+/*
-+write the lz77-encoded data, which has lit, len and dist codes, to compressed stream using huffman trees.
-+tree_ll: the tree for lit and len codes.
-+tree_d: the tree for distance codes.
-+*/
-+static void writeLZ77data(size_t* bp, ucvector* out, const uivector* lz77_encoded,
-+                          const HuffmanTree* tree_ll, const HuffmanTree* tree_d)
-+{
-+  size_t i = 0;
-+  for(i = 0; i != lz77_encoded->size; ++i)
-+  {
-+    unsigned val = lz77_encoded->data[i];
-+    addHuffmanSymbol(bp, out, HuffmanTree_getCode(tree_ll, val), HuffmanTree_getLength(tree_ll, val));
-+    if(val > 256) /*for a length code, 3 more things have to be added*/
-+    {
-+      unsigned length_index = val - FIRST_LENGTH_CODE_INDEX;
-+      unsigned n_length_extra_bits = LENGTHEXTRA[length_index];
-+      unsigned length_extra_bits = lz77_encoded->data[++i];
-+
-+      unsigned distance_code = lz77_encoded->data[++i];
-+
-+      unsigned distance_index = distance_code;
-+      unsigned n_distance_extra_bits = DISTANCEEXTRA[distance_index];
-+      unsigned distance_extra_bits = lz77_encoded->data[++i];
-+
-+      addBitsToStream(bp, out, length_extra_bits, n_length_extra_bits);
-+      addHuffmanSymbol(bp, out, HuffmanTree_getCode(tree_d, distance_code),
-+                       HuffmanTree_getLength(tree_d, distance_code));
-+      addBitsToStream(bp, out, distance_extra_bits, n_distance_extra_bits);
-+    }
-+  }
-+}
-+
-+/*Deflate for a block of type "dynamic", that is, with freely, optimally, created huffman trees*/
-+static unsigned deflateDynamic(ucvector* out, size_t* bp, Hash* hash,
-+                               const unsigned char* data, size_t datapos, size_t dataend,
-+                               const LodePNGCompressSettings* settings, unsigned final)
-+{
-+  unsigned error = 0;
-+
-+  /*
-+  A block is compressed as follows: The PNG data is lz77 encoded, resulting in
-+  literal bytes and length/distance pairs. This is then huffman compressed with
-+  two huffman trees. One huffman tree is used for the lit and len values ("ll"),
-+  another huffman tree is used for the dist values ("d"). These two trees are
-+  stored using their code lengths, and to compress even more these code lengths
-+  are also run-length encoded and huffman compressed. This gives a huffman tree
-+  of code lengths "cl". The code lenghts used to describe this third tree are
-+  the code length code lengths ("clcl").
-+  */
-+
-+  /*The lz77 encoded data, represented with integers since there will also be length and distance codes in it*/
-+  uivector lz77_encoded;
-+  HuffmanTree tree_ll; /*tree for lit,len values*/
-+  HuffmanTree tree_d; /*tree for distance codes*/
-+  HuffmanTree tree_cl; /*tree for encoding the code lengths representing tree_ll and tree_d*/
-+  uivector frequencies_ll; /*frequency of lit,len codes*/
-+  uivector frequencies_d; /*frequency of dist codes*/
-+  uivector frequencies_cl; /*frequency of code length codes*/
-+  uivector bitlen_lld; /*lit,len,dist code lenghts (int bits), literally (without repeat codes).*/
-+  uivector bitlen_lld_e; /*bitlen_lld encoded with repeat codes (this is a rudemtary run length compression)*/
-+  /*bitlen_cl is the code length code lengths ("clcl"). The bit lengths of codes to represent tree_cl
-+  (these are written as is in the file, it would be crazy to compress these using yet another huffman
-+  tree that needs to be represented by yet another set of code lengths)*/
-+  uivector bitlen_cl;
-+  size_t datasize = dataend - datapos;
-+
-+  /*
-+  Due to the huffman compression of huffman tree representations ("two levels"), there are some anologies:
-+  bitlen_lld is to tree_cl what data is to tree_ll and tree_d.
-+  bitlen_lld_e is to bitlen_lld what lz77_encoded is to data.
-+  bitlen_cl is to bitlen_lld_e what bitlen_lld is to lz77_encoded.
-+  */
-+
-+  unsigned BFINAL = final;
-+  size_t numcodes_ll, numcodes_d, i;
-+  unsigned HLIT, HDIST, HCLEN;
-+
-+  uivector_init(&lz77_encoded);
-+  HuffmanTree_init(&tree_ll);
-+  HuffmanTree_init(&tree_d);
-+  HuffmanTree_init(&tree_cl);
-+  uivector_init(&frequencies_ll);
-+  uivector_init(&frequencies_d);
-+  uivector_init(&frequencies_cl);
-+  uivector_init(&bitlen_lld);
-+  uivector_init(&bitlen_lld_e);
-+  uivector_init(&bitlen_cl);
-+
-+  /*This while loop never loops due to a break at the end, it is here to
-+  allow breaking out of it to the cleanup phase on error conditions.*/
-+  while(!error)
-+  {
-+    if(settings->use_lz77)
-+    {
-+      error = encodeLZ77(&lz77_encoded, hash, data, datapos, dataend, settings->windowsize,
-+                         settings->minmatch, settings->nicematch, settings->lazymatching);
-+      if(error) break;
-+    }
-+    else
-+    {
-+      if(!uivector_resize(&lz77_encoded, datasize)) ERROR_BREAK(83 /*alloc fail*/);
-+      for(i = datapos; i < dataend; ++i) lz77_encoded.data[i - datapos] = data[i]; /*no LZ77, but still will be Huffman compressed*/
-+    }
-+
-+    if(!uivector_resizev(&frequencies_ll, 286, 0)) ERROR_BREAK(83 /*alloc fail*/);
-+    if(!uivector_resizev(&frequencies_d, 30, 0)) ERROR_BREAK(83 /*alloc fail*/);
-+
-+    /*Count the frequencies of lit, len and dist codes*/
-+    for(i = 0; i != lz77_encoded.size; ++i)
-+    {
-+      unsigned symbol = lz77_encoded.data[i];
-+      ++frequencies_ll.data[symbol];
-+      if(symbol > 256)
-+      {
-+        unsigned dist = lz77_encoded.data[i + 2];
-+        ++frequencies_d.data[dist];
-+        i += 3;
-+      }
-+    }
-+    frequencies_ll.data[256] = 1; /*there will be exactly 1 end code, at the end of the block*/
-+
-+    /*Make both huffman trees, one for the lit and len codes, one for the dist codes*/
-+    error = HuffmanTree_makeFromFrequencies(&tree_ll, frequencies_ll.data, 257, frequencies_ll.size, 15);
-+    if(error) break;
-+    /*2, not 1, is chosen for mincodes: some buggy PNG decoders require at least 2 symbols in the dist tree*/
-+    error = HuffmanTree_makeFromFrequencies(&tree_d, frequencies_d.data, 2, frequencies_d.size, 15);
-+    if(error) break;
-+
-+    numcodes_ll = tree_ll.numcodes; if(numcodes_ll > 286) numcodes_ll = 286;
-+    numcodes_d = tree_d.numcodes; if(numcodes_d > 30) numcodes_d = 30;
-+    /*store the code lengths of both generated trees in bitlen_lld*/
-+    for(i = 0; i != numcodes_ll; ++i) uivector_push_back(&bitlen_lld, HuffmanTree_getLength(&tree_ll, (unsigned)i));
-+    for(i = 0; i != numcodes_d; ++i) uivector_push_back(&bitlen_lld, HuffmanTree_getLength(&tree_d, (unsigned)i));
-+
-+    /*run-length compress bitlen_ldd into bitlen_lld_e by using repeat codes 16 (copy length 3-6 times),
-+    17 (3-10 zeroes), 18 (11-138 zeroes)*/
-+    for(i = 0; i != (unsigned)bitlen_lld.size; ++i)
-+    {
-+      unsigned j = 0; /*amount of repititions*/
-+      while(i + j + 1 < (unsigned)bitlen_lld.size && bitlen_lld.data[i + j + 1] == bitlen_lld.data[i]) ++j;
-+
-+      if(bitlen_lld.data[i] == 0 && j >= 2) /*repeat code for zeroes*/
-+      {
-+        ++j; /*include the first zero*/
-+        if(j <= 10) /*repeat code 17 supports max 10 zeroes*/
-+        {
-+          uivector_push_back(&bitlen_lld_e, 17);
-+          uivector_push_back(&bitlen_lld_e, j - 3);
-+        }
-+        else /*repeat code 18 supports max 138 zeroes*/
-+        {
-+          if(j > 138) j = 138;
-+          uivector_push_back(&bitlen_lld_e, 18);
-+          uivector_push_back(&bitlen_lld_e, j - 11);
-+        }
-+        i += (j - 1);
-+      }
-+      else if(j >= 3) /*repeat code for value other than zero*/
-+      {
-+        size_t k;
-+        unsigned num = j / 6, rest = j % 6;
-+        uivector_push_back(&bitlen_lld_e, bitlen_lld.data[i]);
-+        for(k = 0; k < num; ++k)
-+        {
-+          uivector_push_back(&bitlen_lld_e, 16);
-+          uivector_push_back(&bitlen_lld_e, 6 - 3);
-+        }
-+        if(rest >= 3)
-+        {
-+          uivector_push_back(&bitlen_lld_e, 16);
-+          uivector_push_back(&bitlen_lld_e, rest - 3);
-+        }
-+        else j -= rest;
-+        i += j;
-+      }
-+      else /*too short to benefit from repeat code*/
-+      {
-+        uivector_push_back(&bitlen_lld_e, bitlen_lld.data[i]);
-+      }
-+    }
-+
-+    /*generate tree_cl, the huffmantree of huffmantrees*/
-+
-+    if(!uivector_resizev(&frequencies_cl, NUM_CODE_LENGTH_CODES, 0)) ERROR_BREAK(83 /*alloc fail*/);
-+    for(i = 0; i != bitlen_lld_e.size; ++i)
-+    {
-+      ++frequencies_cl.data[bitlen_lld_e.data[i]];
-+      /*after a repeat code come the bits that specify the number of repetitions,
-+      those don't need to be in the frequencies_cl calculation*/
-+      if(bitlen_lld_e.data[i] >= 16) ++i;
-+    }
-+
-+    error = HuffmanTree_makeFromFrequencies(&tree_cl, frequencies_cl.data,
-+                                            frequencies_cl.size, frequencies_cl.size, 7);
-+    if(error) break;
-+
-+    if(!uivector_resize(&bitlen_cl, tree_cl.numcodes)) ERROR_BREAK(83 /*alloc fail*/);
-+    for(i = 0; i != tree_cl.numcodes; ++i)
-+    {
-+      /*lenghts of code length tree is in the order as specified by deflate*/
-+      bitlen_cl.data[i] = HuffmanTree_getLength(&tree_cl, CLCL_ORDER[i]);
-+    }
-+    while(bitlen_cl.data[bitlen_cl.size - 1] == 0 && bitlen_cl.size > 4)
-+    {
-+      /*remove zeros at the end, but minimum size must be 4*/
-+      if(!uivector_resize(&bitlen_cl, bitlen_cl.size - 1)) ERROR_BREAK(83 /*alloc fail*/);
-+    }
-+    if(error) break;
-+
-+    /*
-+    Write everything into the output
-+
-+    After the BFINAL and BTYPE, the dynamic block consists out of the following:
-+    - 5 bits HLIT, 5 bits HDIST, 4 bits HCLEN
-+    - (HCLEN+4)*3 bits code lengths of code length alphabet
-+    - HLIT + 257 code lenghts of lit/length alphabet (encoded using the code length
-+      alphabet, + possible repetition codes 16, 17, 18)
-+    - HDIST + 1 code lengths of distance alphabet (encoded using the code length
-+      alphabet, + possible repetition codes 16, 17, 18)
-+    - compressed data
-+    - 256 (end code)
-+    */
-+
-+    /*Write block type*/
-+    addBitToStream(bp, out, BFINAL);
-+    addBitToStream(bp, out, 0); /*first bit of BTYPE "dynamic"*/
-+    addBitToStream(bp, out, 1); /*second bit of BTYPE "dynamic"*/
-+
-+    /*write the HLIT, HDIST and HCLEN values*/
-+    HLIT = (unsigned)(numcodes_ll - 257);
-+    HDIST = (unsigned)(numcodes_d - 1);
-+    HCLEN = (unsigned)bitlen_cl.size - 4;
-+    /*trim zeroes for HCLEN. HLIT and HDIST were already trimmed at tree creation*/
-+    while(!bitlen_cl.data[HCLEN + 4 - 1] && HCLEN > 0) --HCLEN;
-+    addBitsToStream(bp, out, HLIT, 5);
-+    addBitsToStream(bp, out, HDIST, 5);
-+    addBitsToStream(bp, out, HCLEN, 4);
-+
-+    /*write the code lenghts of the code length alphabet*/
-+    for(i = 0; i != HCLEN + 4; ++i) addBitsToStream(bp, out, bitlen_cl.data[i], 3);
-+
-+    /*write the lenghts of the lit/len AND the dist alphabet*/
-+    for(i = 0; i != bitlen_lld_e.size; ++i)
-+    {
-+      addHuffmanSymbol(bp, out, HuffmanTree_getCode(&tree_cl, bitlen_lld_e.data[i]),
-+                       HuffmanTree_getLength(&tree_cl, bitlen_lld_e.data[i]));
-+      /*extra bits of repeat codes*/
-+      if(bitlen_lld_e.data[i] == 16) addBitsToStream(bp, out, bitlen_lld_e.data[++i], 2);
-+      else if(bitlen_lld_e.data[i] == 17) addBitsToStream(bp, out, bitlen_lld_e.data[++i], 3);
-+      else if(bitlen_lld_e.data[i] == 18) addBitsToStream(bp, out, bitlen_lld_e.data[++i], 7);
-+    }
-+
-+    /*write the compressed data symbols*/
-+    writeLZ77data(bp, out, &lz77_encoded, &tree_ll, &tree_d);
-+    /*error: the length of the end code 256 must be larger than 0*/
-+    if(HuffmanTree_getLength(&tree_ll, 256) == 0) ERROR_BREAK(64);
-+
-+    /*write the end code*/
-+    addHuffmanSymbol(bp, out, HuffmanTree_getCode(&tree_ll, 256), HuffmanTree_getLength(&tree_ll, 256));
-+
-+    break; /*end of error-while*/
-+  }
-+
-+  /*cleanup*/
-+  uivector_cleanup(&lz77_encoded);
-+  HuffmanTree_cleanup(&tree_ll);
-+  HuffmanTree_cleanup(&tree_d);
-+  HuffmanTree_cleanup(&tree_cl);
-+  uivector_cleanup(&frequencies_ll);
-+  uivector_cleanup(&frequencies_d);
-+  uivector_cleanup(&frequencies_cl);
-+  uivector_cleanup(&bitlen_lld_e);
-+  uivector_cleanup(&bitlen_lld);
-+  uivector_cleanup(&bitlen_cl);
-+
-+  return error;
-+}
-+
-+static unsigned deflateFixed(ucvector* out, size_t* bp, Hash* hash,
-+                             const unsigned char* data,
-+                             size_t datapos, size_t dataend,
-+                             const LodePNGCompressSettings* settings, unsigned final)
-+{
-+  HuffmanTree tree_ll; /*tree for literal values and length codes*/
-+  HuffmanTree tree_d; /*tree for distance codes*/
-+
-+  unsigned BFINAL = final;
-+  unsigned error = 0;
-+  size_t i;
-+
-+  HuffmanTree_init(&tree_ll);
-+  HuffmanTree_init(&tree_d);
-+
-+  generateFixedLitLenTree(&tree_ll);
-+  generateFixedDistanceTree(&tree_d);
-+
-+  addBitToStream(bp, out, BFINAL);
-+  addBitToStream(bp, out, 1); /*first bit of BTYPE*/
-+  addBitToStream(bp, out, 0); /*second bit of BTYPE*/
-+
-+  if(settings->use_lz77) /*LZ77 encoded*/
-+  {
-+    uivector lz77_encoded;
-+    uivector_init(&lz77_encoded);
-+    error = encodeLZ77(&lz77_encoded, hash, data, datapos, dataend, settings->windowsize,
-+                       settings->minmatch, settings->nicematch, settings->lazymatching);
-+    if(!error) writeLZ77data(bp, out, &lz77_encoded, &tree_ll, &tree_d);
-+    uivector_cleanup(&lz77_encoded);
-+  }
-+  else /*no LZ77, but still will be Huffman compressed*/
-+  {
-+    for(i = datapos; i < dataend; ++i)
-+    {
-+      addHuffmanSymbol(bp, out, HuffmanTree_getCode(&tree_ll, data[i]), HuffmanTree_getLength(&tree_ll, data[i]));
-+    }
-+  }
-+  /*add END code*/
-+  if(!error) addHuffmanSymbol(bp, out, HuffmanTree_getCode(&tree_ll, 256), HuffmanTree_getLength(&tree_ll, 256));
-+
-+  /*cleanup*/
-+  HuffmanTree_cleanup(&tree_ll);
-+  HuffmanTree_cleanup(&tree_d);
-+
-+  return error;
-+}
-+
-+static unsigned lodepng_deflatev(ucvector* out, const unsigned char* in, size_t insize,
-+                                 const LodePNGCompressSettings* settings)
-+{
-+  unsigned error = 0;
-+  size_t i, blocksize, numdeflateblocks;
-+  size_t bp = 0; /*the bit pointer*/
-+  Hash hash;
-+
-+  if(settings->btype > 2) return 61;
-+  else if(settings->btype == 0) return deflateNoCompression(out, in, insize);
-+  else if(settings->btype == 1) blocksize = insize;
-+  else /*if(settings->btype == 2)*/
-+  {
-+    /*on PNGs, deflate blocks of 65-262k seem to give most dense encoding*/
-+    blocksize = insize / 8 + 8;
-+    if(blocksize < 65536) blocksize = 65536;
-+    if(blocksize > 262144) blocksize = 262144;
-+  }
-+
-+  numdeflateblocks = (insize + blocksize - 1) / blocksize;
-+  if(numdeflateblocks == 0) numdeflateblocks = 1;
-+
-+  error = hash_init(&hash, settings->windowsize);
-+  if(error) return error;
-+
-+  for(i = 0; i != numdeflateblocks && !error; ++i)
-+  {
-+    unsigned final = (i == numdeflateblocks - 1);
-+    size_t start = i * blocksize;
-+    size_t end = start + blocksize;
-+    if(end > insize) end = insize;
-+
-+    if(settings->btype == 1) error = deflateFixed(out, &bp, &hash, in, start, end, settings, final);
-+    else if(settings->btype == 2) error = deflateDynamic(out, &bp, &hash, in, start, end, settings, final);
-+  }
-+
-+  hash_cleanup(&hash);
-+
-+  return error;
-+}
-+
-+unsigned lodepng_deflate(unsigned char** out, size_t* outsize,
-+                         const unsigned char* in, size_t insize,
-+                         const LodePNGCompressSettings* settings)
-+{
-+  unsigned error;
-+  ucvector v;
-+  ucvector_init_buffer(&v, *out, *outsize);
-+  error = lodepng_deflatev(&v, in, insize, settings);
-+  *out = v.data;
-+  *outsize = v.size;
-+  return error;
-+}
-+
-+static unsigned deflate(unsigned char** out, size_t* outsize,
-+                        const unsigned char* in, size_t insize,
-+                        const LodePNGCompressSettings* settings)
-+{
-+  if(settings->custom_deflate)
-+  {
-+    return settings->custom_deflate(out, outsize, in, insize, settings);
-+  }
-+  else
-+  {
-+    return lodepng_deflate(out, outsize, in, insize, settings);
-+  }
-+}
-+
-+#endif /*LODEPNG_COMPILE_DECODER*/
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* / Adler32                                                                  */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+static unsigned update_adler32(unsigned adler, const unsigned char* data, unsigned len)
-+{
-+   unsigned s1 = adler & 0xffff;
-+   unsigned s2 = (adler >> 16) & 0xffff;
-+
-+  while(len > 0)
-+  {
-+    /*at least 5550 sums can be done before the sums overflow, saving a lot of module divisions*/
-+    unsigned amount = len > 5550 ? 5550 : len;
-+    len -= amount;
-+    while(amount > 0)
-+    {
-+      s1 += (*data++);
-+      s2 += s1;
-+      --amount;
-+    }
-+    s1 %= 65521;
-+    s2 %= 65521;
-+  }
-+
-+  return (s2 << 16) | s1;
-+}
-+
-+/*Return the adler32 of the bytes data[0..len-1]*/
-+static unsigned adler32(const unsigned char* data, unsigned len)
-+{
-+  return update_adler32(1L, data, len);
-+}
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* / Zlib                                                                   / */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+#ifdef LODEPNG_COMPILE_DECODER
-+
-+unsigned lodepng_zlib_decompress(unsigned char** out, size_t* outsize, const unsigned char* in,
-+                                 size_t insize, const LodePNGDecompressSettings* settings)
-+{
-+  unsigned error = 0;
-+  unsigned CM, CINFO, FDICT;
-+
-+  if(insize < 2) return 53; /*error, size of zlib data too small*/
-+  /*read information from zlib header*/
-+  if((in[0] * 256 + in[1]) % 31 != 0)
-+  {
-+    /*error: 256 * in[0] + in[1] must be a multiple of 31, the FCHECK value is supposed to be made that way*/
-+    return 24;
-+  }
-+
-+  CM = in[0] & 15;
-+  CINFO = (in[0] >> 4) & 15;
-+  /*FCHECK = in[1] & 31;*/ /*FCHECK is already tested above*/
-+  FDICT = (in[1] >> 5) & 1;
-+  /*FLEVEL = (in[1] >> 6) & 3;*/ /*FLEVEL is not used here*/
-+
-+  if(CM != 8 || CINFO > 7)
-+  {
-+    /*error: only compression method 8: inflate with sliding window of 32k is supported by the PNG spec*/
-+    return 25;
-+  }
-+  if(FDICT != 0)
-+  {
-+    /*error: the specification of PNG says about the zlib stream:
-+      "The additional flags shall not specify a preset dictionary."*/
-+    return 26;
-+  }
-+
-+  error = inflate(out, outsize, in + 2, insize - 2, settings);
-+  if(error) return error;
-+
-+  if(!settings->ignore_adler32)
-+  {
-+    unsigned ADLER32 = lodepng_read32bitInt(&in[insize - 4]);
-+    unsigned checksum = adler32(*out, (unsigned)(*outsize));
-+    if(checksum != ADLER32) return 58; /*error, adler checksum not correct, data must be corrupted*/
-+  }
-+
-+  return 0; /*no error*/
-+}
-+
-+static unsigned zlib_decompress(unsigned char** out, size_t* outsize, const unsigned char* in,
-+                                size_t insize, const LodePNGDecompressSettings* settings)
-+{
-+  if(settings->custom_zlib)
-+  {
-+    return settings->custom_zlib(out, outsize, in, insize, settings);
-+  }
-+  else
-+  {
-+    return lodepng_zlib_decompress(out, outsize, in, insize, settings);
-+  }
-+}
-+
-+#endif /*LODEPNG_COMPILE_DECODER*/
-+
-+#ifdef LODEPNG_COMPILE_ENCODER
-+
-+unsigned lodepng_zlib_compress(unsigned char** out, size_t* outsize, const unsigned char* in,
-+                               size_t insize, const LodePNGCompressSettings* settings)
-+{
-+  /*initially, *out must be NULL and outsize 0, if you just give some random *out
-+  that's pointing to a non allocated buffer, this'll crash*/
-+  ucvector outv;
-+  size_t i;
-+  unsigned error;
-+  unsigned char* deflatedata = 0;
-+  size_t deflatesize = 0;
-+
-+  /*zlib data: 1 byte CMF (CM+CINFO), 1 byte FLG, deflate data, 4 byte ADLER32 checksum of the Decompressed data*/
-+  unsigned CMF = 120; /*0b01111000: CM 8, CINFO 7. With CINFO 7, any window size up to 32768 can be used.*/
-+  unsigned FLEVEL = 0;
-+  unsigned FDICT = 0;
-+  unsigned CMFFLG = 256 * CMF + FDICT * 32 + FLEVEL * 64;
-+  unsigned FCHECK = 31 - CMFFLG % 31;
-+  CMFFLG += FCHECK;
-+
-+  /*ucvector-controlled version of the output buffer, for dynamic array*/
-+  ucvector_init_buffer(&outv, *out, *outsize);
-+
-+  ucvector_push_back(&outv, (unsigned char)(CMFFLG >> 8));
-+  ucvector_push_back(&outv, (unsigned char)(CMFFLG & 255));
-+
-+  error = deflate(&deflatedata, &deflatesize, in, insize, settings);
-+
-+  if(!error)
-+  {
-+    unsigned ADLER32 = adler32(in, (unsigned)insize);
-+    for(i = 0; i != deflatesize; ++i) ucvector_push_back(&outv, deflatedata[i]);
-+    lodepng_free(deflatedata);
-+    lodepng_add32bitInt(&outv, ADLER32);
-+  }
-+
-+  *out = outv.data;
-+  *outsize = outv.size;
-+
-+  return error;
-+}
-+
-+/* compress using the default or custom zlib function */
-+static unsigned zlib_compress(unsigned char** out, size_t* outsize, const unsigned char* in,
-+                              size_t insize, const LodePNGCompressSettings* settings)
-+{
-+  if(settings->custom_zlib)
-+  {
-+    return settings->custom_zlib(out, outsize, in, insize, settings);
-+  }
-+  else
-+  {
-+    return lodepng_zlib_compress(out, outsize, in, insize, settings);
-+  }
-+}
-+
-+#endif /*LODEPNG_COMPILE_ENCODER*/
-+
-+#else /*no LODEPNG_COMPILE_ZLIB*/
-+
-+#ifdef LODEPNG_COMPILE_DECODER
-+static unsigned zlib_decompress(unsigned char** out, size_t* outsize, const unsigned char* in,
-+                                size_t insize, const LodePNGDecompressSettings* settings)
-+{
-+  if(!settings->custom_zlib) return 87; /*no custom zlib function provided */
-+  return settings->custom_zlib(out, outsize, in, insize, settings);
-+}
-+#endif /*LODEPNG_COMPILE_DECODER*/
-+#ifdef LODEPNG_COMPILE_ENCODER
-+static unsigned zlib_compress(unsigned char** out, size_t* outsize, const unsigned char* in,
-+                              size_t insize, const LodePNGCompressSettings* settings)
-+{
-+  if(!settings->custom_zlib) return 87; /*no custom zlib function provided */
-+  return settings->custom_zlib(out, outsize, in, insize, settings);
-+}
-+#endif /*LODEPNG_COMPILE_ENCODER*/
-+
-+#endif /*LODEPNG_COMPILE_ZLIB*/
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+#ifdef LODEPNG_COMPILE_ENCODER
-+
-+/*this is a good tradeoff between speed and compression ratio*/
-+#define DEFAULT_WINDOWSIZE 2048
-+
-+void lodepng_compress_settings_init(LodePNGCompressSettings* settings)
-+{
-+  /*compress with dynamic huffman tree (not in the mathematical sense, just not the predefined one)*/
-+  settings->btype = 2;
-+  settings->use_lz77 = 1;
-+  settings->windowsize = DEFAULT_WINDOWSIZE;
-+  settings->minmatch = 3;
-+  settings->nicematch = 128;
-+  settings->lazymatching = 1;
-+
-+  settings->custom_zlib = 0;
-+  settings->custom_deflate = 0;
-+  settings->custom_context = 0;
-+}
-+
-+const LodePNGCompressSettings lodepng_default_compress_settings = {2, 1, DEFAULT_WINDOWSIZE, 3, 128, 1, 0, 0, 0};
-+
-+
-+#endif /*LODEPNG_COMPILE_ENCODER*/
-+
-+#ifdef LODEPNG_COMPILE_DECODER
-+
-+void lodepng_decompress_settings_init(LodePNGDecompressSettings* settings)
-+{
-+  settings->ignore_adler32 = 0;
-+
-+  settings->custom_zlib = 0;
-+  settings->custom_inflate = 0;
-+  settings->custom_context = 0;
-+}
-+
-+const LodePNGDecompressSettings lodepng_default_decompress_settings = {0, 0, 0, 0};
-+
-+#endif /*LODEPNG_COMPILE_DECODER*/
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* // End of Zlib related code. Begin of PNG related code.                 // */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+#ifdef LODEPNG_COMPILE_PNG
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* / CRC32                                                                  / */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+
-+#ifndef LODEPNG_NO_COMPILE_CRC
-+/* CRC polynomial: 0xedb88320 */
-+static unsigned lodepng_crc32_table[256] = {
-+           0u, 1996959894u, 3993919788u, 2567524794u,  124634137u, 1886057615u, 3915621685u, 2657392035u,
-+   249268274u, 2044508324u, 3772115230u, 2547177864u,  162941995u, 2125561021u, 3887607047u, 2428444049u,
-+   498536548u, 1789927666u, 4089016648u, 2227061214u,  450548861u, 1843258603u, 4107580753u, 2211677639u,
-+   325883990u, 1684777152u, 4251122042u, 2321926636u,  335633487u, 1661365465u, 4195302755u, 2366115317u,
-+   997073096u, 1281953886u, 3579855332u, 2724688242u, 1006888145u, 1258607687u, 3524101629u, 2768942443u,
-+   901097722u, 1119000684u, 3686517206u, 2898065728u,  853044451u, 1172266101u, 3705015759u, 2882616665u,
-+   651767980u, 1373503546u, 3369554304u, 3218104598u,  565507253u, 1454621731u, 3485111705u, 3099436303u,
-+   671266974u, 1594198024u, 3322730930u, 2970347812u,  795835527u, 1483230225u, 3244367275u, 3060149565u,
-+  1994146192u,   31158534u, 2563907772u, 4023717930u, 1907459465u,  112637215u, 2680153253u, 3904427059u,
-+  2013776290u,  251722036u, 2517215374u, 3775830040u, 2137656763u,  141376813u, 2439277719u, 3865271297u,
-+  1802195444u,  476864866u, 2238001368u, 4066508878u, 1812370925u,  453092731u, 2181625025u, 4111451223u,
-+  1706088902u,  314042704u, 2344532202u, 4240017532u, 1658658271u,  366619977u, 2362670323u, 4224994405u,
-+  1303535960u,  984961486u, 2747007092u, 3569037538u, 1256170817u, 1037604311u, 2765210733u, 3554079995u,
-+  1131014506u,  879679996u, 2909243462u, 3663771856u, 1141124467u,  855842277u, 2852801631u, 3708648649u,
-+  1342533948u,  654459306u, 3188396048u, 3373015174u, 1466479909u,  544179635u, 3110523913u, 3462522015u,
-+  1591671054u,  702138776u, 2966460450u, 3352799412u, 1504918807u,  783551873u, 3082640443u, 3233442989u,
-+  3988292384u, 2596254646u,   62317068u, 1957810842u, 3939845945u, 2647816111u,   81470997u, 1943803523u,
-+  3814918930u, 2489596804u,  225274430u, 2053790376u, 3826175755u, 2466906013u,  167816743u, 2097651377u,
-+  4027552580u, 2265490386u,  503444072u, 1762050814u, 4150417245u, 2154129355u,  426522225u, 1852507879u,
-+  4275313526u, 2312317920u,  282753626u, 1742555852u, 4189708143u, 2394877945u,  397917763u, 1622183637u,
-+  3604390888u, 2714866558u,  953729732u, 1340076626u, 3518719985u, 2797360999u, 1068828381u, 1219638859u,
-+  3624741850u, 2936675148u,  906185462u, 1090812512u, 3747672003u, 2825379669u,  829329135u, 1181335161u,
-+  3412177804u, 3160834842u,  628085408u, 1382605366u, 3423369109u, 3138078467u,  570562233u, 1426400815u,
-+  3317316542u, 2998733608u,  733239954u, 1555261956u, 3268935591u, 3050360625u,  752459403u, 1541320221u,
-+  2607071920u, 3965973030u, 1969922972u,   40735498u, 2617837225u, 3943577151u, 1913087877u,   83908371u,
-+  2512341634u, 3803740692u, 2075208622u,  213261112u, 2463272603u, 3855990285u, 2094854071u,  198958881u,
-+  2262029012u, 4057260610u, 1759359992u,  534414190u, 2176718541u, 4139329115u, 1873836001u,  414664567u,
-+  2282248934u, 4279200368u, 1711684554u,  285281116u, 2405801727u, 4167216745u, 1634467795u,  376229701u,
-+  2685067896u, 3608007406u, 1308918612u,  956543938u, 2808555105u, 3495958263u, 1231636301u, 1047427035u,
-+  2932959818u, 3654703836u, 1088359270u,  936918000u, 2847714899u, 3736837829u, 1202900863u,  817233897u,
-+  3183342108u, 3401237130u, 1404277552u,  615818150u, 3134207493u, 3453421203u, 1423857449u,  601450431u,
-+  3009837614u, 3294710456u, 1567103746u,  711928724u, 3020668471u, 3272380065u, 1510334235u,  755167117u
-+};
-+
-+/*Return the CRC of the bytes buf[0..len-1].*/
-+unsigned lodepng_crc32(const unsigned char* data, size_t length)
-+{
-+  unsigned r = 0xffffffffu;
-+  size_t i;
-+  for(i = 0; i < length; ++i)
-+  {
-+    r = lodepng_crc32_table[(r ^ data[i]) & 0xff] ^ (r >> 8);
-+  }
-+  return r ^ 0xffffffffu;
-+}
-+#else /* !LODEPNG_NO_COMPILE_CRC */
-+unsigned lodepng_crc32(const unsigned char* data, size_t length);
-+#endif /* !LODEPNG_NO_COMPILE_CRC */
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* / Reading and writing single bits and bytes from/to stream for LodePNG   / */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+static unsigned char readBitFromReversedStream(size_t* bitpointer, const unsigned char* bitstream)
-+{
-+  unsigned char result = (unsigned char)((bitstream[(*bitpointer) >> 3] >> (7 - ((*bitpointer) & 0x7))) & 1);
-+  ++(*bitpointer);
-+  return result;
-+}
-+
-+static unsigned readBitsFromReversedStream(size_t* bitpointer, const unsigned char* bitstream, size_t nbits)
-+{
-+  unsigned result = 0;
-+  size_t i;
-+  for(i = nbits - 1; i < nbits; --i)
-+  {
-+    result += (unsigned)readBitFromReversedStream(bitpointer, bitstream) << i;
-+  }
-+  return result;
-+}
-+
-+#ifdef LODEPNG_COMPILE_DECODER
-+static void setBitOfReversedStream0(size_t* bitpointer, unsigned char* bitstream, unsigned char bit)
-+{
-+  /*the current bit in bitstream must be 0 for this to work*/
-+  if(bit)
-+  {
-+    /*earlier bit of huffman code is in a lesser significant bit of an earlier byte*/
-+    bitstream[(*bitpointer) >> 3] |= (bit << (7 - ((*bitpointer) & 0x7)));
-+  }
-+  ++(*bitpointer);
-+}
-+#endif /*LODEPNG_COMPILE_DECODER*/
-+
-+static void setBitOfReversedStream(size_t* bitpointer, unsigned char* bitstream, unsigned char bit)
-+{
-+  /*the current bit in bitstream may be 0 or 1 for this to work*/
-+  if(bit == 0) bitstream[(*bitpointer) >> 3] &=  (unsigned char)(~(1 << (7 - ((*bitpointer) & 0x7))));
-+  else         bitstream[(*bitpointer) >> 3] |=  (1 << (7 - ((*bitpointer) & 0x7)));
-+  ++(*bitpointer);
-+}
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* / PNG chunks                                                             / */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+unsigned lodepng_chunk_length(const unsigned char* chunk)
-+{
-+  return lodepng_read32bitInt(&chunk[0]);
-+}
-+
-+void lodepng_chunk_type(char type[5], const unsigned char* chunk)
-+{
-+  unsigned i;
-+  for(i = 0; i != 4; ++i) type[i] = (char)chunk[4 + i];
-+  type[4] = 0; /*null termination char*/
-+}
-+
-+unsigned char lodepng_chunk_type_equals(const unsigned char* chunk, const char* type)
-+{
-+  if(strlen(type) != 4) return 0;
-+  return (chunk[4] == type[0] && chunk[5] == type[1] && chunk[6] == type[2] && chunk[7] == type[3]);
-+}
-+
-+unsigned char lodepng_chunk_ancillary(const unsigned char* chunk)
-+{
-+  return((chunk[4] & 32) != 0);
-+}
-+
-+unsigned char lodepng_chunk_private(const unsigned char* chunk)
-+{
-+  return((chunk[6] & 32) != 0);
-+}
-+
-+unsigned char lodepng_chunk_safetocopy(const unsigned char* chunk)
-+{
-+  return((chunk[7] & 32) != 0);
-+}
-+
-+unsigned char* lodepng_chunk_data(unsigned char* chunk)
-+{
-+  return &chunk[8];
-+}
-+
-+const unsigned char* lodepng_chunk_data_const(const unsigned char* chunk)
-+{
-+  return &chunk[8];
-+}
-+
-+unsigned lodepng_chunk_check_crc(const unsigned char* chunk)
-+{
-+  unsigned length = lodepng_chunk_length(chunk);
-+  unsigned CRC = lodepng_read32bitInt(&chunk[length + 8]);
-+  /*the CRC is taken of the data and the 4 chunk type letters, not the length*/
-+  unsigned checksum = lodepng_crc32(&chunk[4], length + 4);
-+  if(CRC != checksum) return 1;
-+  else return 0;
-+}
-+
-+void lodepng_chunk_generate_crc(unsigned char* chunk)
-+{
-+  unsigned length = lodepng_chunk_length(chunk);
-+  unsigned CRC = lodepng_crc32(&chunk[4], length + 4);
-+  lodepng_set32bitInt(chunk + 8 + length, CRC);
-+}
-+
-+unsigned char* lodepng_chunk_next(unsigned char* chunk)
-+{
-+  unsigned total_chunk_length = lodepng_chunk_length(chunk) + 12;
-+  return &chunk[total_chunk_length];
-+}
-+
-+const unsigned char* lodepng_chunk_next_const(const unsigned char* chunk)
-+{
-+  unsigned total_chunk_length = lodepng_chunk_length(chunk) + 12;
-+  return &chunk[total_chunk_length];
-+}
-+
-+unsigned lodepng_chunk_append(unsigned char** out, size_t* outlength, const unsigned char* chunk)
-+{
-+  unsigned i;
-+  unsigned total_chunk_length = lodepng_chunk_length(chunk) + 12;
-+  unsigned char *chunk_start, *new_buffer;
-+  size_t new_length = (*outlength) + total_chunk_length;
-+  if(new_length < total_chunk_length || new_length < (*outlength)) return 77; /*integer overflow happened*/
-+
-+  new_buffer = (unsigned char*)lodepng_realloc(*out, new_length);
-+  if(!new_buffer) return 83; /*alloc fail*/
-+  (*out) = new_buffer;
-+  (*outlength) = new_length;
-+  chunk_start = &(*out)[new_length - total_chunk_length];
-+
-+  for(i = 0; i != total_chunk_length; ++i) chunk_start[i] = chunk[i];
-+
-+  return 0;
-+}
-+
-+unsigned lodepng_chunk_create(unsigned char** out, size_t* outlength, unsigned length,
-+                              const char* type, const unsigned char* data)
-+{
-+  unsigned i;
-+  unsigned char *chunk, *new_buffer;
-+  size_t new_length = (*outlength) + length + 12;
-+  if(new_length < length + 12 || new_length < (*outlength)) return 77; /*integer overflow happened*/
-+  new_buffer = (unsigned char*)lodepng_realloc(*out, new_length);
-+  if(!new_buffer) return 83; /*alloc fail*/
-+  (*out) = new_buffer;
-+  (*outlength) = new_length;
-+  chunk = &(*out)[(*outlength) - length - 12];
-+
-+  /*1: length*/
-+  lodepng_set32bitInt(chunk, (unsigned)length);
-+
-+  /*2: chunk name (4 letters)*/
-+  chunk[4] = (unsigned char)type[0];
-+  chunk[5] = (unsigned char)type[1];
-+  chunk[6] = (unsigned char)type[2];
-+  chunk[7] = (unsigned char)type[3];
-+
-+  /*3: the data*/
-+  for(i = 0; i != length; ++i) chunk[8 + i] = data[i];
-+
-+  /*4: CRC (of the chunkname characters and the data)*/
-+  lodepng_chunk_generate_crc(chunk);
-+
-+  return 0;
-+}
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* / Color types and such                                                   / */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+/*return type is a LodePNG error code*/
-+static unsigned checkColorValidity(LodePNGColorType colortype, unsigned bd) /*bd = bitdepth*/
-+{
-+  switch(colortype)
-+  {
-+    case 0: if(!(bd == 1 || bd == 2 || bd == 4 || bd == 8 || bd == 16)) return 37; break; /*grey*/
-+    case 2: if(!(                                 bd == 8 || bd == 16)) return 37; break; /*RGB*/
-+    case 3: if(!(bd == 1 || bd == 2 || bd == 4 || bd == 8            )) return 37; break; /*palette*/
-+    case 4: if(!(                                 bd == 8 || bd == 16)) return 37; break; /*grey + alpha*/
-+    case 6: if(!(                                 bd == 8 || bd == 16)) return 37; break; /*RGBA*/
-+    default: return 31;
-+  }
-+  return 0; /*allowed color type / bits combination*/
-+}
-+
-+static unsigned getNumColorChannels(LodePNGColorType colortype)
-+{
-+  switch(colortype)
-+  {
-+    case 0: return 1; /*grey*/
-+    case 2: return 3; /*RGB*/
-+    case 3: return 1; /*palette*/
-+    case 4: return 2; /*grey + alpha*/
-+    case 6: return 4; /*RGBA*/
-+  }
-+  return 0; /*unexisting color type*/
-+}
-+
-+static unsigned lodepng_get_bpp_lct(LodePNGColorType colortype, unsigned bitdepth)
-+{
-+  /*bits per pixel is amount of channels * bits per channel*/
-+  return getNumColorChannels(colortype) * bitdepth;
-+}
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+void lodepng_color_mode_init(LodePNGColorMode* info)
-+{
-+  info->key_defined = 0;
-+  info->key_r = info->key_g = info->key_b = 0;
-+  info->colortype = LCT_RGBA;
-+  info->bitdepth = 8;
-+  info->palette = 0;
-+  info->palettesize = 0;
-+}
-+
-+void lodepng_color_mode_cleanup(LodePNGColorMode* info)
-+{
-+  lodepng_palette_clear(info);
-+}
-+
-+unsigned lodepng_color_mode_copy(LodePNGColorMode* dest, const LodePNGColorMode* source)
-+{
-+  size_t i;
-+  lodepng_color_mode_cleanup(dest);
-+  *dest = *source;
-+  if(source->palette)
-+  {
-+    dest->palette = (unsigned char*)lodepng_malloc(1024);
-+    if(!dest->palette && source->palettesize) return 83; /*alloc fail*/
-+    for(i = 0; i != source->palettesize * 4; ++i) dest->palette[i] = source->palette[i];
-+  }
-+  return 0;
-+}
-+
-+static int lodepng_color_mode_equal(const LodePNGColorMode* a, const LodePNGColorMode* b)
-+{
-+  size_t i;
-+  if(a->colortype != b->colortype) return 0;
-+  if(a->bitdepth != b->bitdepth) return 0;
-+  if(a->key_defined != b->key_defined) return 0;
-+  if(a->key_defined)
-+  {
-+    if(a->key_r != b->key_r) return 0;
-+    if(a->key_g != b->key_g) return 0;
-+    if(a->key_b != b->key_b) return 0;
-+  }
-+  /*if one of the palette sizes is 0, then we consider it to be the same as the
-+  other: it means that e.g. the palette was not given by the user and should be
-+  considered the same as the palette inside the PNG.*/
-+  if(1/*a->palettesize != 0 && b->palettesize != 0*/) {
-+    if(a->palettesize != b->palettesize) return 0;
-+    for(i = 0; i != a->palettesize * 4; ++i)
-+    {
-+      if(a->palette[i] != b->palette[i]) return 0;
-+    }
-+  }
-+  return 1;
-+}
-+
-+void lodepng_palette_clear(LodePNGColorMode* info)
-+{
-+  if(info->palette) lodepng_free(info->palette);
-+  info->palette = 0;
-+  info->palettesize = 0;
-+}
-+
-+unsigned lodepng_palette_add(LodePNGColorMode* info,
-+                             unsigned char r, unsigned char g, unsigned char b, unsigned char a)
-+{
-+  unsigned char* data;
-+  /*the same resize technique as C++ std::vectors is used, and here it's made so that for a palette with
-+  the max of 256 colors, it'll have the exact alloc size*/
-+  if(!info->palette) /*allocate palette if empty*/
-+  {
-+    /*room for 256 colors with 4 bytes each*/
-+    data = (unsigned char*)lodepng_realloc(info->palette, 1024);
-+    if(!data) return 83; /*alloc fail*/
-+    else info->palette = data;
-+  }
-+  info->palette[4 * info->palettesize + 0] = r;
-+  info->palette[4 * info->palettesize + 1] = g;
-+  info->palette[4 * info->palettesize + 2] = b;
-+  info->palette[4 * info->palettesize + 3] = a;
-+  ++info->palettesize;
-+  return 0;
-+}
-+
-+unsigned lodepng_get_bpp(const LodePNGColorMode* info)
-+{
-+  /*calculate bits per pixel out of colortype and bitdepth*/
-+  return lodepng_get_bpp_lct(info->colortype, info->bitdepth);
-+}
-+
-+unsigned lodepng_get_channels(const LodePNGColorMode* info)
-+{
-+  return getNumColorChannels(info->colortype);
-+}
-+
-+unsigned lodepng_is_greyscale_type(const LodePNGColorMode* info)
-+{
-+  return info->colortype == LCT_GREY || info->colortype == LCT_GREY_ALPHA;
-+}
-+
-+unsigned lodepng_is_alpha_type(const LodePNGColorMode* info)
-+{
-+  return (info->colortype & 4) != 0; /*4 or 6*/
-+}
-+
-+unsigned lodepng_is_palette_type(const LodePNGColorMode* info)
-+{
-+  return info->colortype == LCT_PALETTE;
-+}
-+
-+unsigned lodepng_has_palette_alpha(const LodePNGColorMode* info)
-+{
-+  size_t i;
-+  for(i = 0; i != info->palettesize; ++i)
-+  {
-+    if(info->palette[i * 4 + 3] < 255) return 1;
-+  }
-+  return 0;
-+}
-+
-+unsigned lodepng_can_have_alpha(const LodePNGColorMode* info)
-+{
-+  return info->key_defined
-+      || lodepng_is_alpha_type(info)
-+      || lodepng_has_palette_alpha(info);
-+}
-+
-+size_t lodepng_get_raw_size(unsigned w, unsigned h, const LodePNGColorMode* color)
-+{
-+  /*will not overflow for any color type if roughly w * h < 268435455*/
-+  size_t bpp = lodepng_get_bpp(color);
-+  size_t n = w * h;
-+  return ((n / 8) * bpp) + ((n & 7) * bpp + 7) / 8;
-+}
-+
-+size_t lodepng_get_raw_size_lct(unsigned w, unsigned h, LodePNGColorType colortype, unsigned bitdepth)
-+{
-+  /*will not overflow for any color type if roughly w * h < 268435455*/
-+  size_t bpp = lodepng_get_bpp_lct(colortype, bitdepth);
-+  size_t n = w * h;
-+  return ((n / 8) * bpp) + ((n & 7) * bpp + 7) / 8;
-+}
-+
-+
-+#ifdef LODEPNG_COMPILE_PNG
-+#ifdef LODEPNG_COMPILE_DECODER
-+/*in an idat chunk, each scanline is a multiple of 8 bits, unlike the lodepng output buffer*/
-+static size_t lodepng_get_raw_size_idat(unsigned w, unsigned h, const LodePNGColorMode* color)
-+{
-+  /*will not overflow for any color type if roughly w * h < 268435455*/
-+  size_t bpp = lodepng_get_bpp(color);
-+  size_t line = ((w / 8) * bpp) + ((w & 7) * bpp + 7) / 8;
-+  return h * line;
-+}
-+#endif /*LODEPNG_COMPILE_DECODER*/
-+#endif /*LODEPNG_COMPILE_PNG*/
-+
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+
-+static void LodePNGUnknownChunks_init(LodePNGInfo* info)
-+{
-+  unsigned i;
-+  for(i = 0; i != 3; ++i) info->unknown_chunks_data[i] = 0;
-+  for(i = 0; i != 3; ++i) info->unknown_chunks_size[i] = 0;
-+}
-+
-+static void LodePNGUnknownChunks_cleanup(LodePNGInfo* info)
-+{
-+  unsigned i;
-+  for(i = 0; i != 3; ++i) lodepng_free(info->unknown_chunks_data[i]);
-+}
-+
-+static unsigned LodePNGUnknownChunks_copy(LodePNGInfo* dest, const LodePNGInfo* src)
-+{
-+  unsigned i;
-+
-+  LodePNGUnknownChunks_cleanup(dest);
-+
-+  for(i = 0; i != 3; ++i)
-+  {
-+    size_t j;
-+    dest->unknown_chunks_size[i] = src->unknown_chunks_size[i];
-+    dest->unknown_chunks_data[i] = (unsigned char*)lodepng_malloc(src->unknown_chunks_size[i]);
-+    if(!dest->unknown_chunks_data[i] && dest->unknown_chunks_size[i]) return 83; /*alloc fail*/
-+    for(j = 0; j < src->unknown_chunks_size[i]; ++j)
-+    {
-+      dest->unknown_chunks_data[i][j] = src->unknown_chunks_data[i][j];
-+    }
-+  }
-+
-+  return 0;
-+}
-+
-+/******************************************************************************/
-+
-+static void LodePNGText_init(LodePNGInfo* info)
-+{
-+  info->text_num = 0;
-+  info->text_keys = NULL;
-+  info->text_strings = NULL;
-+}
-+
-+static void LodePNGText_cleanup(LodePNGInfo* info)
-+{
-+  size_t i;
-+  for(i = 0; i != info->text_num; ++i)
-+  {
-+    string_cleanup(&info->text_keys[i]);
-+    string_cleanup(&info->text_strings[i]);
-+  }
-+  lodepng_free(info->text_keys);
-+  lodepng_free(info->text_strings);
-+}
-+
-+static unsigned LodePNGText_copy(LodePNGInfo* dest, const LodePNGInfo* source)
-+{
-+  size_t i = 0;
-+  dest->text_keys = 0;
-+  dest->text_strings = 0;
-+  dest->text_num = 0;
-+  for(i = 0; i != source->text_num; ++i)
-+  {
-+    CERROR_TRY_RETURN(lodepng_add_text(dest, source->text_keys[i], source->text_strings[i]));
-+  }
-+  return 0;
-+}
-+
-+void lodepng_clear_text(LodePNGInfo* info)
-+{
-+  LodePNGText_cleanup(info);
-+}
-+
-+unsigned lodepng_add_text(LodePNGInfo* info, const char* key, const char* str)
-+{
-+  char** new_keys = (char**)(lodepng_realloc(info->text_keys, sizeof(char*) * (info->text_num + 1)));
-+  char** new_strings = (char**)(lodepng_realloc(info->text_strings, sizeof(char*) * (info->text_num + 1)));
-+  if(!new_keys || !new_strings)
-+  {
-+    lodepng_free(new_keys);
-+    lodepng_free(new_strings);
-+    return 83; /*alloc fail*/
-+  }
-+
-+  ++info->text_num;
-+  info->text_keys = new_keys;
-+  info->text_strings = new_strings;
-+
-+  string_init(&info->text_keys[info->text_num - 1]);
-+  string_set(&info->text_keys[info->text_num - 1], key);
-+
-+  string_init(&info->text_strings[info->text_num - 1]);
-+  string_set(&info->text_strings[info->text_num - 1], str);
-+
-+  return 0;
-+}
-+
-+/******************************************************************************/
-+
-+static void LodePNGIText_init(LodePNGInfo* info)
-+{
-+  info->itext_num = 0;
-+  info->itext_keys = NULL;
-+  info->itext_langtags = NULL;
-+  info->itext_transkeys = NULL;
-+  info->itext_strings = NULL;
-+}
-+
-+static void LodePNGIText_cleanup(LodePNGInfo* info)
-+{
-+  size_t i;
-+  for(i = 0; i != info->itext_num; ++i)
-+  {
-+    string_cleanup(&info->itext_keys[i]);
-+    string_cleanup(&info->itext_langtags[i]);
-+    string_cleanup(&info->itext_transkeys[i]);
-+    string_cleanup(&info->itext_strings[i]);
-+  }
-+  lodepng_free(info->itext_keys);
-+  lodepng_free(info->itext_langtags);
-+  lodepng_free(info->itext_transkeys);
-+  lodepng_free(info->itext_strings);
-+}
-+
-+static unsigned LodePNGIText_copy(LodePNGInfo* dest, const LodePNGInfo* source)
-+{
-+  size_t i = 0;
-+  dest->itext_keys = 0;
-+  dest->itext_langtags = 0;
-+  dest->itext_transkeys = 0;
-+  dest->itext_strings = 0;
-+  dest->itext_num = 0;
-+  for(i = 0; i != source->itext_num; ++i)
-+  {
-+    CERROR_TRY_RETURN(lodepng_add_itext(dest, source->itext_keys[i], source->itext_langtags[i],
-+                                        source->itext_transkeys[i], source->itext_strings[i]));
-+  }
-+  return 0;
-+}
-+
-+void lodepng_clear_itext(LodePNGInfo* info)
-+{
-+  LodePNGIText_cleanup(info);
-+}
-+
-+unsigned lodepng_add_itext(LodePNGInfo* info, const char* key, const char* langtag,
-+                           const char* transkey, const char* str)
-+{
-+  char** new_keys = (char**)(lodepng_realloc(info->itext_keys, sizeof(char*) * (info->itext_num + 1)));
-+  char** new_langtags = (char**)(lodepng_realloc(info->itext_langtags, sizeof(char*) * (info->itext_num + 1)));
-+  char** new_transkeys = (char**)(lodepng_realloc(info->itext_transkeys, sizeof(char*) * (info->itext_num + 1)));
-+  char** new_strings = (char**)(lodepng_realloc(info->itext_strings, sizeof(char*) * (info->itext_num + 1)));
-+  if(!new_keys || !new_langtags || !new_transkeys || !new_strings)
-+  {
-+    lodepng_free(new_keys);
-+    lodepng_free(new_langtags);
-+    lodepng_free(new_transkeys);
-+    lodepng_free(new_strings);
-+    return 83; /*alloc fail*/
-+  }
-+
-+  ++info->itext_num;
-+  info->itext_keys = new_keys;
-+  info->itext_langtags = new_langtags;
-+  info->itext_transkeys = new_transkeys;
-+  info->itext_strings = new_strings;
-+
-+  string_init(&info->itext_keys[info->itext_num - 1]);
-+  string_set(&info->itext_keys[info->itext_num - 1], key);
-+
-+  string_init(&info->itext_langtags[info->itext_num - 1]);
-+  string_set(&info->itext_langtags[info->itext_num - 1], langtag);
-+
-+  string_init(&info->itext_transkeys[info->itext_num - 1]);
-+  string_set(&info->itext_transkeys[info->itext_num - 1], transkey);
-+
-+  string_init(&info->itext_strings[info->itext_num - 1]);
-+  string_set(&info->itext_strings[info->itext_num - 1], str);
-+
-+  return 0;
-+}
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+
-+void lodepng_info_init(LodePNGInfo* info)
-+{
-+  lodepng_color_mode_init(&info->color);
-+  info->interlace_method = 0;
-+  info->compression_method = 0;
-+  info->filter_method = 0;
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+  info->background_defined = 0;
-+  info->background_r = info->background_g = info->background_b = 0;
-+
-+  LodePNGText_init(info);
-+  LodePNGIText_init(info);
-+
-+  info->time_defined = 0;
-+  info->phys_defined = 0;
-+
-+  LodePNGUnknownChunks_init(info);
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+}
-+
-+void lodepng_info_cleanup(LodePNGInfo* info)
-+{
-+  lodepng_color_mode_cleanup(&info->color);
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+  LodePNGText_cleanup(info);
-+  LodePNGIText_cleanup(info);
-+
-+  LodePNGUnknownChunks_cleanup(info);
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+}
-+
-+unsigned lodepng_info_copy(LodePNGInfo* dest, const LodePNGInfo* source)
-+{
-+  lodepng_info_cleanup(dest);
-+  *dest = *source;
-+  lodepng_color_mode_init(&dest->color);
-+  CERROR_TRY_RETURN(lodepng_color_mode_copy(&dest->color, &source->color));
-+
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+  CERROR_TRY_RETURN(LodePNGText_copy(dest, source));
-+  CERROR_TRY_RETURN(LodePNGIText_copy(dest, source));
-+
-+  LodePNGUnknownChunks_init(dest);
-+  CERROR_TRY_RETURN(LodePNGUnknownChunks_copy(dest, source));
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+  return 0;
-+}
-+
-+void lodepng_info_swap(LodePNGInfo* a, LodePNGInfo* b)
-+{
-+  LodePNGInfo temp = *a;
-+  *a = *b;
-+  *b = temp;
-+}
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+/*index: bitgroup index, bits: bitgroup size(1, 2 or 4), in: bitgroup value, out: octet array to add bits to*/
-+static void addColorBits(unsigned char* out, size_t index, unsigned bits, unsigned in)
-+{
-+  unsigned m = bits == 1 ? 7 : bits == 2 ? 3 : 1; /*8 / bits - 1*/
-+  /*p = the partial index in the byte, e.g. with 4 palettebits it is 0 for first half or 1 for second half*/
-+  unsigned p = index & m;
-+  in &= (1u << bits) - 1u; /*filter out any other bits of the input value*/
-+  in = in << (bits * (m - p));
-+  if(p == 0) out[index * bits / 8] = in;
-+  else out[index * bits / 8] |= in;
-+}
-+
-+typedef struct ColorTree ColorTree;
-+
-+/*
-+One node of a color tree
-+This is the data structure used to count the number of unique colors and to get a palette
-+index for a color. It's like an octree, but because the alpha channel is used too, each
-+node has 16 instead of 8 children.
-+*/
-+struct ColorTree
-+{
-+  ColorTree* children[16]; /*up to 16 pointers to ColorTree of next level*/
-+  int index; /*the payload. Only has a meaningful value if this is in the last level*/
-+};
-+
-+static void color_tree_init(ColorTree* tree)
-+{
-+  int i;
-+  for(i = 0; i != 16; ++i) tree->children[i] = 0;
-+  tree->index = -1;
-+}
-+
-+static void color_tree_cleanup(ColorTree* tree)
-+{
-+  int i;
-+  for(i = 0; i != 16; ++i)
-+  {
-+    if(tree->children[i])
-+    {
-+      color_tree_cleanup(tree->children[i]);
-+      lodepng_free(tree->children[i]);
-+    }
-+  }
-+}
-+
-+/*returns -1 if color not present, its index otherwise*/
-+static int color_tree_get(ColorTree* tree, unsigned char r, unsigned char g, unsigned char b, unsigned char a)
-+{
-+  int bit = 0;
-+  for(bit = 0; bit < 8; ++bit)
-+  {
-+    int i = 8 * ((r >> bit) & 1) + 4 * ((g >> bit) & 1) + 2 * ((b >> bit) & 1) + 1 * ((a >> bit) & 1);
-+    if(!tree->children[i]) return -1;
-+    else tree = tree->children[i];
-+  }
-+  return tree ? tree->index : -1;
-+}
-+
-+#ifdef LODEPNG_COMPILE_ENCODER
-+static int color_tree_has(ColorTree* tree, unsigned char r, unsigned char g, unsigned char b, unsigned char a)
-+{
-+  return color_tree_get(tree, r, g, b, a) >= 0;
-+}
-+#endif /*LODEPNG_COMPILE_ENCODER*/
-+
-+/*color is not allowed to already exist.
-+Index should be >= 0 (it's signed to be compatible with using -1 for "doesn't exist")*/
-+static void color_tree_add(ColorTree* tree,
-+                           unsigned char r, unsigned char g, unsigned char b, unsigned char a, unsigned index)
-+{
-+  int bit;
-+  for(bit = 0; bit < 8; ++bit)
-+  {
-+    int i = 8 * ((r >> bit) & 1) + 4 * ((g >> bit) & 1) + 2 * ((b >> bit) & 1) + 1 * ((a >> bit) & 1);
-+    if(!tree->children[i])
-+    {
-+      tree->children[i] = (ColorTree*)lodepng_malloc(sizeof(ColorTree));
-+      color_tree_init(tree->children[i]);
-+    }
-+    tree = tree->children[i];
-+  }
-+  tree->index = (int)index;
-+}
-+
-+/*put a pixel, given its RGBA color, into image of any color type*/
-+static unsigned rgba8ToPixel(unsigned char* out, size_t i,
-+                             const LodePNGColorMode* mode, ColorTree* tree /*for palette*/,
-+                             unsigned char r, unsigned char g, unsigned char b, unsigned char a)
-+{
-+  if(mode->colortype == LCT_GREY)
-+  {
-+    unsigned char grey = r; /*((unsigned short)r + g + b) / 3*/;
-+    if(mode->bitdepth == 8) out[i] = grey;
-+    else if(mode->bitdepth == 16) out[i * 2 + 0] = out[i * 2 + 1] = grey;
-+    else
-+    {
-+      /*take the most significant bits of grey*/
-+      grey = (grey >> (8 - mode->bitdepth)) & ((1 << mode->bitdepth) - 1);
-+      addColorBits(out, i, mode->bitdepth, grey);
-+    }
-+  }
-+  else if(mode->colortype == LCT_RGB)
-+  {
-+    if(mode->bitdepth == 8)
-+    {
-+      out[i * 3 + 0] = r;
-+      out[i * 3 + 1] = g;
-+      out[i * 3 + 2] = b;
-+    }
-+    else
-+    {
-+      out[i * 6 + 0] = out[i * 6 + 1] = r;
-+      out[i * 6 + 2] = out[i * 6 + 3] = g;
-+      out[i * 6 + 4] = out[i * 6 + 5] = b;
-+    }
-+  }
-+  else if(mode->colortype == LCT_PALETTE)
-+  {
-+    int index = color_tree_get(tree, r, g, b, a);
-+    if(index < 0) return 82; /*color not in palette*/
-+    if(mode->bitdepth == 8) out[i] = index;
-+    else addColorBits(out, i, mode->bitdepth, (unsigned)index);
-+  }
-+  else if(mode->colortype == LCT_GREY_ALPHA)
-+  {
-+    unsigned char grey = r; /*((unsigned short)r + g + b) / 3*/;
-+    if(mode->bitdepth == 8)
-+    {
-+      out[i * 2 + 0] = grey;
-+      out[i * 2 + 1] = a;
-+    }
-+    else if(mode->bitdepth == 16)
-+    {
-+      out[i * 4 + 0] = out[i * 4 + 1] = grey;
-+      out[i * 4 + 2] = out[i * 4 + 3] = a;
-+    }
-+  }
-+  else if(mode->colortype == LCT_RGBA)
-+  {
-+    if(mode->bitdepth == 8)
-+    {
-+      out[i * 4 + 0] = r;
-+      out[i * 4 + 1] = g;
-+      out[i * 4 + 2] = b;
-+      out[i * 4 + 3] = a;
-+    }
-+    else
-+    {
-+      out[i * 8 + 0] = out[i * 8 + 1] = r;
-+      out[i * 8 + 2] = out[i * 8 + 3] = g;
-+      out[i * 8 + 4] = out[i * 8 + 5] = b;
-+      out[i * 8 + 6] = out[i * 8 + 7] = a;
-+    }
-+  }
-+
-+  return 0; /*no error*/
-+}
-+
-+/*put a pixel, given its RGBA16 color, into image of any color 16-bitdepth type*/
-+static void rgba16ToPixel(unsigned char* out, size_t i,
-+                         const LodePNGColorMode* mode,
-+                         unsigned short r, unsigned short g, unsigned short b, unsigned short a)
-+{
-+  if(mode->colortype == LCT_GREY)
-+  {
-+    unsigned short grey = r; /*((unsigned)r + g + b) / 3*/;
-+    out[i * 2 + 0] = (grey >> 8) & 255;
-+    out[i * 2 + 1] = grey & 255;
-+  }
-+  else if(mode->colortype == LCT_RGB)
-+  {
-+    out[i * 6 + 0] = (r >> 8) & 255;
-+    out[i * 6 + 1] = r & 255;
-+    out[i * 6 + 2] = (g >> 8) & 255;
-+    out[i * 6 + 3] = g & 255;
-+    out[i * 6 + 4] = (b >> 8) & 255;
-+    out[i * 6 + 5] = b & 255;
-+  }
-+  else if(mode->colortype == LCT_GREY_ALPHA)
-+  {
-+    unsigned short grey = r; /*((unsigned)r + g + b) / 3*/;
-+    out[i * 4 + 0] = (grey >> 8) & 255;
-+    out[i * 4 + 1] = grey & 255;
-+    out[i * 4 + 2] = (a >> 8) & 255;
-+    out[i * 4 + 3] = a & 255;
-+  }
-+  else if(mode->colortype == LCT_RGBA)
-+  {
-+    out[i * 8 + 0] = (r >> 8) & 255;
-+    out[i * 8 + 1] = r & 255;
-+    out[i * 8 + 2] = (g >> 8) & 255;
-+    out[i * 8 + 3] = g & 255;
-+    out[i * 8 + 4] = (b >> 8) & 255;
-+    out[i * 8 + 5] = b & 255;
-+    out[i * 8 + 6] = (a >> 8) & 255;
-+    out[i * 8 + 7] = a & 255;
-+  }
-+}
-+
-+/*Get RGBA8 color of pixel with index i (y * width + x) from the raw image with given color type.*/
-+static void getPixelColorRGBA8(unsigned char* r, unsigned char* g,
-+                               unsigned char* b, unsigned char* a,
-+                               const unsigned char* in, size_t i,
-+                               const LodePNGColorMode* mode)
-+{
-+  if(mode->colortype == LCT_GREY)
-+  {
-+    if(mode->bitdepth == 8)
-+    {
-+      *r = *g = *b = in[i];
-+      if(mode->key_defined && *r == mode->key_r) *a = 0;
-+      else *a = 255;
-+    }
-+    else if(mode->bitdepth == 16)
-+    {
-+      *r = *g = *b = in[i * 2 + 0];
-+      if(mode->key_defined && 256U * in[i * 2 + 0] + in[i * 2 + 1] == mode->key_r) *a = 0;
-+      else *a = 255;
-+    }
-+    else
-+    {
-+      unsigned highest = ((1U << mode->bitdepth) - 1U); /*highest possible value for this bit depth*/
-+      size_t j = i * mode->bitdepth;
-+      unsigned value = readBitsFromReversedStream(&j, in, mode->bitdepth);
-+      *r = *g = *b = (value * 255) / highest;
-+      if(mode->key_defined && value == mode->key_r) *a = 0;
-+      else *a = 255;
-+    }
-+  }
-+  else if(mode->colortype == LCT_RGB)
-+  {
-+    if(mode->bitdepth == 8)
-+    {
-+      *r = in[i * 3 + 0]; *g = in[i * 3 + 1]; *b = in[i * 3 + 2];
-+      if(mode->key_defined && *r == mode->key_r && *g == mode->key_g && *b == mode->key_b) *a = 0;
-+      else *a = 255;
-+    }
-+    else
-+    {
-+      *r = in[i * 6 + 0];
-+      *g = in[i * 6 + 2];
-+      *b = in[i * 6 + 4];
-+      if(mode->key_defined && 256U * in[i * 6 + 0] + in[i * 6 + 1] == mode->key_r
-+         && 256U * in[i * 6 + 2] + in[i * 6 + 3] == mode->key_g
-+         && 256U * in[i * 6 + 4] + in[i * 6 + 5] == mode->key_b) *a = 0;
-+      else *a = 255;
-+    }
-+  }
-+  else if(mode->colortype == LCT_PALETTE)
-+  {
-+    unsigned index;
-+    if(mode->bitdepth == 8) index = in[i];
-+    else
-+    {
-+      size_t j = i * mode->bitdepth;
-+      index = readBitsFromReversedStream(&j, in, mode->bitdepth);
-+    }
-+
-+    if(index >= mode->palettesize)
-+    {
-+      /*This is an error according to the PNG spec, but common PNG decoders make it black instead.
-+      Done here too, slightly faster due to no error handling needed.*/
-+      *r = *g = *b = 0;
-+      *a = 255;
-+    }
-+    else
-+    {
-+      *r = mode->palette[index * 4 + 0];
-+      *g = mode->palette[index * 4 + 1];
-+      *b = mode->palette[index * 4 + 2];
-+      *a = mode->palette[index * 4 + 3];
-+    }
-+  }
-+  else if(mode->colortype == LCT_GREY_ALPHA)
-+  {
-+    if(mode->bitdepth == 8)
-+    {
-+      *r = *g = *b = in[i * 2 + 0];
-+      *a = in[i * 2 + 1];
-+    }
-+    else
-+    {
-+      *r = *g = *b = in[i * 4 + 0];
-+      *a = in[i * 4 + 2];
-+    }
-+  }
-+  else if(mode->colortype == LCT_RGBA)
-+  {
-+    if(mode->bitdepth == 8)
-+    {
-+      *r = in[i * 4 + 0];
-+      *g = in[i * 4 + 1];
-+      *b = in[i * 4 + 2];
-+      *a = in[i * 4 + 3];
-+    }
-+    else
-+    {
-+      *r = in[i * 8 + 0];
-+      *g = in[i * 8 + 2];
-+      *b = in[i * 8 + 4];
-+      *a = in[i * 8 + 6];
-+    }
-+  }
-+}
-+
-+/*Similar to getPixelColorRGBA8, but with all the for loops inside of the color
-+mode test cases, optimized to convert the colors much faster, when converting
-+to RGBA or RGB with 8 bit per cannel. buffer must be RGBA or RGB output with
-+enough memory, if has_alpha is true the output is RGBA. mode has the color mode
-+of the input buffer.*/
-+static void getPixelColorsRGBA8(unsigned char* buffer, size_t numpixels,
-+                                unsigned has_alpha, const unsigned char* in,
-+                                const LodePNGColorMode* mode)
-+{
-+  unsigned num_channels = has_alpha ? 4 : 3;
-+  size_t i;
-+  if(mode->colortype == LCT_GREY)
-+  {
-+    if(mode->bitdepth == 8)
-+    {
-+      for(i = 0; i != numpixels; ++i, buffer += num_channels)
-+      {
-+        buffer[0] = buffer[1] = buffer[2] = in[i];
-+        if(has_alpha) buffer[3] = mode->key_defined && in[i] == mode->key_r ? 0 : 255;
-+      }
-+    }
-+    else if(mode->bitdepth == 16)
-+    {
-+      for(i = 0; i != numpixels; ++i, buffer += num_channels)
-+      {
-+        buffer[0] = buffer[1] = buffer[2] = in[i * 2];
-+        if(has_alpha) buffer[3] = mode->key_defined && 256U * in[i * 2 + 0] + in[i * 2 + 1] == mode->key_r ? 0 : 255;
-+      }
-+    }
-+    else
-+    {
-+      unsigned highest = ((1U << mode->bitdepth) - 1U); /*highest possible value for this bit depth*/
-+      size_t j = 0;
-+      for(i = 0; i != numpixels; ++i, buffer += num_channels)
-+      {
-+        unsigned value = readBitsFromReversedStream(&j, in, mode->bitdepth);
-+        buffer[0] = buffer[1] = buffer[2] = (value * 255) / highest;
-+        if(has_alpha) buffer[3] = mode->key_defined && value == mode->key_r ? 0 : 255;
-+      }
-+    }
-+  }
-+  else if(mode->colortype == LCT_RGB)
-+  {
-+    if(mode->bitdepth == 8)
-+    {
-+      for(i = 0; i != numpixels; ++i, buffer += num_channels)
-+      {
-+        buffer[0] = in[i * 3 + 0];
-+        buffer[1] = in[i * 3 + 1];
-+        buffer[2] = in[i * 3 + 2];
-+        if(has_alpha) buffer[3] = mode->key_defined && buffer[0] == mode->key_r
-+           && buffer[1]== mode->key_g && buffer[2] == mode->key_b ? 0 : 255;
-+      }
-+    }
-+    else
-+    {
-+      for(i = 0; i != numpixels; ++i, buffer += num_channels)
-+      {
-+        buffer[0] = in[i * 6 + 0];
-+        buffer[1] = in[i * 6 + 2];
-+        buffer[2] = in[i * 6 + 4];
-+        if(has_alpha) buffer[3] = mode->key_defined
-+           && 256U * in[i * 6 + 0] + in[i * 6 + 1] == mode->key_r
-+           && 256U * in[i * 6 + 2] + in[i * 6 + 3] == mode->key_g
-+           && 256U * in[i * 6 + 4] + in[i * 6 + 5] == mode->key_b ? 0 : 255;
-+      }
-+    }
-+  }
-+  else if(mode->colortype == LCT_PALETTE)
-+  {
-+    unsigned index;
-+    size_t j = 0;
-+    for(i = 0; i != numpixels; ++i, buffer += num_channels)
-+    {
-+      if(mode->bitdepth == 8) index = in[i];
-+      else index = readBitsFromReversedStream(&j, in, mode->bitdepth);
-+
-+      if(index >= mode->palettesize)
-+      {
-+        /*This is an error according to the PNG spec, but most PNG decoders make it black instead.
-+        Done here too, slightly faster due to no error handling needed.*/
-+        buffer[0] = buffer[1] = buffer[2] = 0;
-+        if(has_alpha) buffer[3] = 255;
-+      }
-+      else
-+      {
-+        buffer[0] = mode->palette[index * 4 + 0];
-+        buffer[1] = mode->palette[index * 4 + 1];
-+        buffer[2] = mode->palette[index * 4 + 2];
-+        if(has_alpha) buffer[3] = mode->palette[index * 4 + 3];
-+      }
-+    }
-+  }
-+  else if(mode->colortype == LCT_GREY_ALPHA)
-+  {
-+    if(mode->bitdepth == 8)
-+    {
-+      for(i = 0; i != numpixels; ++i, buffer += num_channels)
-+      {
-+        buffer[0] = buffer[1] = buffer[2] = in[i * 2 + 0];
-+        if(has_alpha) buffer[3] = in[i * 2 + 1];
-+      }
-+    }
-+    else
-+    {
-+      for(i = 0; i != numpixels; ++i, buffer += num_channels)
-+      {
-+        buffer[0] = buffer[1] = buffer[2] = in[i * 4 + 0];
-+        if(has_alpha) buffer[3] = in[i * 4 + 2];
-+      }
-+    }
-+  }
-+  else if(mode->colortype == LCT_RGBA)
-+  {
-+    if(mode->bitdepth == 8)
-+    {
-+      for(i = 0; i != numpixels; ++i, buffer += num_channels)
-+      {
-+        buffer[0] = in[i * 4 + 0];
-+        buffer[1] = in[i * 4 + 1];
-+        buffer[2] = in[i * 4 + 2];
-+        if(has_alpha) buffer[3] = in[i * 4 + 3];
-+      }
-+    }
-+    else
-+    {
-+      for(i = 0; i != numpixels; ++i, buffer += num_channels)
-+      {
-+        buffer[0] = in[i * 8 + 0];
-+        buffer[1] = in[i * 8 + 2];
-+        buffer[2] = in[i * 8 + 4];
-+        if(has_alpha) buffer[3] = in[i * 8 + 6];
-+      }
-+    }
-+  }
-+}
-+
-+/*Get RGBA16 color of pixel with index i (y * width + x) from the raw image with
-+given color type, but the given color type must be 16-bit itself.*/
-+static void getPixelColorRGBA16(unsigned short* r, unsigned short* g, unsigned short* b, unsigned short* a,
-+                                const unsigned char* in, size_t i, const LodePNGColorMode* mode)
-+{
-+  if(mode->colortype == LCT_GREY)
-+  {
-+    *r = *g = *b = 256 * in[i * 2 + 0] + in[i * 2 + 1];
-+    if(mode->key_defined && 256U * in[i * 2 + 0] + in[i * 2 + 1] == mode->key_r) *a = 0;
-+    else *a = 65535;
-+  }
-+  else if(mode->colortype == LCT_RGB)
-+  {
-+    *r = 256u * in[i * 6 + 0] + in[i * 6 + 1];
-+    *g = 256u * in[i * 6 + 2] + in[i * 6 + 3];
-+    *b = 256u * in[i * 6 + 4] + in[i * 6 + 5];
-+    if(mode->key_defined
-+       && 256u * in[i * 6 + 0] + in[i * 6 + 1] == mode->key_r
-+       && 256u * in[i * 6 + 2] + in[i * 6 + 3] == mode->key_g
-+       && 256u * in[i * 6 + 4] + in[i * 6 + 5] == mode->key_b) *a = 0;
-+    else *a = 65535;
-+  }
-+  else if(mode->colortype == LCT_GREY_ALPHA)
-+  {
-+    *r = *g = *b = 256u * in[i * 4 + 0] + in[i * 4 + 1];
-+    *a = 256u * in[i * 4 + 2] + in[i * 4 + 3];
-+  }
-+  else if(mode->colortype == LCT_RGBA)
-+  {
-+    *r = 256u * in[i * 8 + 0] + in[i * 8 + 1];
-+    *g = 256u * in[i * 8 + 2] + in[i * 8 + 3];
-+    *b = 256u * in[i * 8 + 4] + in[i * 8 + 5];
-+    *a = 256u * in[i * 8 + 6] + in[i * 8 + 7];
-+  }
-+}
-+
-+unsigned lodepng_convert(unsigned char* out, const unsigned char* in,
-+                         const LodePNGColorMode* mode_out, const LodePNGColorMode* mode_in,
-+                         unsigned w, unsigned h)
-+{
-+  size_t i;
-+  ColorTree tree;
-+  size_t numpixels = w * h;
-+
-+  if(lodepng_color_mode_equal(mode_out, mode_in))
-+  {
-+    size_t numbytes = lodepng_get_raw_size(w, h, mode_in);
-+    for(i = 0; i != numbytes; ++i) out[i] = in[i];
-+    return 0;
-+  }
-+
-+  if(mode_out->colortype == LCT_PALETTE)
-+  {
-+    size_t palettesize = mode_out->palettesize;
-+    const unsigned char* palette = mode_out->palette;
-+    size_t palsize = 1u << mode_out->bitdepth;
-+    /*if the user specified output palette but did not give the values, assume
-+    they want the values of the input color type (assuming that one is palette).
-+    Note that we never create a new palette ourselves.*/
-+    if(palettesize == 0)
-+    {
-+      palettesize = mode_in->palettesize;
-+      palette = mode_in->palette;
-+    }
-+    if(palettesize < palsize) palsize = palettesize;
-+    color_tree_init(&tree);
-+    for(i = 0; i != palsize; ++i)
-+    {
-+      const unsigned char* p = &palette[i * 4];
-+      color_tree_add(&tree, p[0], p[1], p[2], p[3], i);
-+    }
-+  }
-+
-+  if(mode_in->bitdepth == 16 && mode_out->bitdepth == 16)
-+  {
-+    for(i = 0; i != numpixels; ++i)
-+    {
-+      unsigned short r = 0, g = 0, b = 0, a = 0;
-+      getPixelColorRGBA16(&r, &g, &b, &a, in, i, mode_in);
-+      rgba16ToPixel(out, i, mode_out, r, g, b, a);
-+    }
-+  }
-+  else if(mode_out->bitdepth == 8 && mode_out->colortype == LCT_RGBA)
-+  {
-+    getPixelColorsRGBA8(out, numpixels, 1, in, mode_in);
-+  }
-+  else if(mode_out->bitdepth == 8 && mode_out->colortype == LCT_RGB)
-+  {
-+    getPixelColorsRGBA8(out, numpixels, 0, in, mode_in);
-+  }
-+  else
-+  {
-+    unsigned char r = 0, g = 0, b = 0, a = 0;
-+    for(i = 0; i != numpixels; ++i)
-+    {
-+      getPixelColorRGBA8(&r, &g, &b, &a, in, i, mode_in);
-+      CERROR_TRY_RETURN(rgba8ToPixel(out, i, mode_out, &tree, r, g, b, a));
-+    }
-+  }
-+
-+  if(mode_out->colortype == LCT_PALETTE)
-+  {
-+    color_tree_cleanup(&tree);
-+  }
-+
-+  return 0; /*no error*/
-+}
-+
-+#ifdef LODEPNG_COMPILE_ENCODER
-+
-+void lodepng_color_profile_init(LodePNGColorProfile* profile)
-+{
-+  profile->colored = 0;
-+  profile->key = 0;
-+  profile->alpha = 0;
-+  profile->key_r = profile->key_g = profile->key_b = 0;
-+  profile->numcolors = 0;
-+  profile->bits = 1;
-+}
-+
-+/*function used for debug purposes with C++*/
-+/*void printColorProfile(LodePNGColorProfile* p)
-+{
-+  std::cout << "colored: " << (int)p->colored << ", ";
-+  std::cout << "key: " << (int)p->key << ", ";
-+  std::cout << "key_r: " << (int)p->key_r << ", ";
-+  std::cout << "key_g: " << (int)p->key_g << ", ";
-+  std::cout << "key_b: " << (int)p->key_b << ", ";
-+  std::cout << "alpha: " << (int)p->alpha << ", ";
-+  std::cout << "numcolors: " << (int)p->numcolors << ", ";
-+  std::cout << "bits: " << (int)p->bits << std::endl;
-+}*/
-+
-+/*Returns how many bits needed to represent given value (max 8 bit)*/
-+static unsigned getValueRequiredBits(unsigned char value)
-+{
-+  if(value == 0 || value == 255) return 1;
-+  /*The scaling of 2-bit and 4-bit values uses multiples of 85 and 17*/
-+  if(value % 17 == 0) return value % 85 == 0 ? 2 : 4;
-+  return 8;
-+}
-+
-+/*profile must already have been inited with mode.
-+It's ok to set some parameters of profile to done already.*/
-+unsigned lodepng_get_color_profile(LodePNGColorProfile* profile,
-+                                   const unsigned char* in, unsigned w, unsigned h,
-+                                   const LodePNGColorMode* mode)
-+{
-+  unsigned error = 0;
-+  size_t i;
-+  ColorTree tree;
-+  size_t numpixels = w * h;
-+
-+  unsigned colored_done = lodepng_is_greyscale_type(mode) ? 1 : 0;
-+  unsigned alpha_done = lodepng_can_have_alpha(mode) ? 0 : 1;
-+  unsigned numcolors_done = 0;
-+  unsigned bpp = lodepng_get_bpp(mode);
-+  unsigned bits_done = bpp == 1 ? 1 : 0;
-+  unsigned maxnumcolors = 257;
-+  unsigned sixteen = 0;
-+  if(bpp <= 8) maxnumcolors = bpp == 1 ? 2 : (bpp == 2 ? 4 : (bpp == 4 ? 16 : 256));
-+
-+  color_tree_init(&tree);
-+
-+  /*Check if the 16-bit input is truly 16-bit*/
-+  if(mode->bitdepth == 16)
-+  {
-+    unsigned short r, g, b, a;
-+    for(i = 0; i != numpixels; ++i)
-+    {
-+      getPixelColorRGBA16(&r, &g, &b, &a, in, i, mode);
-+      if((r & 255) != ((r >> 8) & 255) || (g & 255) != ((g >> 8) & 255) ||
-+         (b & 255) != ((b >> 8) & 255) || (a & 255) != ((a >> 8) & 255)) /*first and second byte differ*/
-+      {
-+        sixteen = 1;
-+        break;
-+      }
-+    }
-+  }
-+
-+  if(sixteen)
-+  {
-+    unsigned short r = 0, g = 0, b = 0, a = 0;
-+    profile->bits = 16;
-+    bits_done = numcolors_done = 1; /*counting colors no longer useful, palette doesn't support 16-bit*/
-+
-+    for(i = 0; i != numpixels; ++i)
-+    {
-+      getPixelColorRGBA16(&r, &g, &b, &a, in, i, mode);
-+
-+      if(!colored_done && (r != g || r != b))
-+      {
-+        profile->colored = 1;
-+        colored_done = 1;
-+      }
-+
-+      if(!alpha_done)
-+      {
-+        unsigned matchkey = (r == profile->key_r && g == profile->key_g && b == profile->key_b);
-+        if(a != 65535 && (a != 0 || (profile->key && !matchkey)))
-+        {
-+          profile->alpha = 1;
-+          alpha_done = 1;
-+          if(profile->bits < 8) profile->bits = 8; /*PNG has no alphachannel modes with less than 8-bit per channel*/
-+        }
-+        else if(a == 0 && !profile->alpha && !profile->key)
-+        {
-+          profile->key = 1;
-+          profile->key_r = r;
-+          profile->key_g = g;
-+          profile->key_b = b;
-+        }
-+        else if(a == 65535 && profile->key && matchkey)
-+        {
-+          /* Color key cannot be used if an opaque pixel also has that RGB color. */
-+          profile->alpha = 1;
-+          alpha_done = 1;
-+        }
-+      }
-+      if(alpha_done && numcolors_done && colored_done && bits_done) break;
-+    }
-+
-+    if(profile->key && !profile->alpha)
-+    {
-+      for(i = 0; i != numpixels; ++i)
-+      {
-+        getPixelColorRGBA16(&r, &g, &b, &a, in, i, mode);
-+        if(a != 0 && r == profile->key_r && g == profile->key_g && b == profile->key_b)
-+        {
-+          /* Color key cannot be used if an opaque pixel also has that RGB color. */
-+          profile->alpha = 1;
-+          alpha_done = 1;
-+        }
-+      }
-+    }
-+  }
-+  else /* < 16-bit */
-+  {
-+    unsigned char r = 0, g = 0, b = 0, a = 0;
-+    for(i = 0; i != numpixels; ++i)
-+    {
-+      getPixelColorRGBA8(&r, &g, &b, &a, in, i, mode);
-+
-+      if(!bits_done && profile->bits < 8)
-+      {
-+        /*only r is checked, < 8 bits is only relevant for greyscale*/
-+        unsigned bits = getValueRequiredBits(r);
-+        if(bits > profile->bits) profile->bits = bits;
-+      }
-+      bits_done = (profile->bits >= bpp);
-+
-+      if(!colored_done && (r != g || r != b))
-+      {
-+        profile->colored = 1;
-+        colored_done = 1;
-+        if(profile->bits < 8) profile->bits = 8; /*PNG has no colored modes with less than 8-bit per channel*/
-+      }
-+
-+      if(!alpha_done)
-+      {
-+        unsigned matchkey = (r == profile->key_r && g == profile->key_g && b == profile->key_b);
-+        if(a != 255 && (a != 0 || (profile->key && !matchkey)))
-+        {
-+          profile->alpha = 1;
-+          alpha_done = 1;
-+          if(profile->bits < 8) profile->bits = 8; /*PNG has no alphachannel modes with less than 8-bit per channel*/
-+        }
-+        else if(a == 0 && !profile->alpha && !profile->key)
-+        {
-+          profile->key = 1;
-+          profile->key_r = r;
-+          profile->key_g = g;
-+          profile->key_b = b;
-+        }
-+        else if(a == 255 && profile->key && matchkey)
-+        {
-+          /* Color key cannot be used if an opaque pixel also has that RGB color. */
-+          profile->alpha = 1;
-+          alpha_done = 1;
-+          if(profile->bits < 8) profile->bits = 8; /*PNG has no alphachannel modes with less than 8-bit per channel*/
-+        }
-+      }
-+
-+      if(!numcolors_done)
-+      {
-+        if(!color_tree_has(&tree, r, g, b, a))
-+        {
-+          color_tree_add(&tree, r, g, b, a, profile->numcolors);
-+          if(profile->numcolors < 256)
-+          {
-+            unsigned char* p = profile->palette;
-+            unsigned n = profile->numcolors;
-+            p[n * 4 + 0] = r;
-+            p[n * 4 + 1] = g;
-+            p[n * 4 + 2] = b;
-+            p[n * 4 + 3] = a;
-+          }
-+          ++profile->numcolors;
-+          numcolors_done = profile->numcolors >= maxnumcolors;
-+        }
-+      }
-+
-+      if(alpha_done && numcolors_done && colored_done && bits_done) break;
-+    }
-+
-+    if(profile->key && !profile->alpha)
-+    {
-+      for(i = 0; i != numpixels; ++i)
-+      {
-+        getPixelColorRGBA8(&r, &g, &b, &a, in, i, mode);
-+        if(a != 0 && r == profile->key_r && g == profile->key_g && b == profile->key_b)
-+        {
-+          /* Color key cannot be used if an opaque pixel also has that RGB color. */
-+          profile->alpha = 1;
-+          alpha_done = 1;
-+        }
-+      }
-+    }
-+
-+    /*make the profile's key always 16-bit for consistency - repeat each byte twice*/
-+    profile->key_r += (profile->key_r << 8);
-+    profile->key_g += (profile->key_g << 8);
-+    profile->key_b += (profile->key_b << 8);
-+  }
-+
-+  color_tree_cleanup(&tree);
-+  return error;
-+}
-+
-+/*Automatically chooses color type that gives smallest amount of bits in the
-+output image, e.g. grey if there are only greyscale pixels, palette if there
-+are less than 256 colors, ...
-+Updates values of mode with a potentially smaller color model. mode_out should
-+contain the user chosen color model, but will be overwritten with the new chosen one.*/
-+unsigned lodepng_auto_choose_color(LodePNGColorMode* mode_out,
-+                                   const unsigned char* image, unsigned w, unsigned h,
-+                                   const LodePNGColorMode* mode_in)
-+{
-+  LodePNGColorProfile prof;
-+  unsigned error = 0;
-+  unsigned i, n, palettebits, grey_ok, palette_ok;
-+
-+  lodepng_color_profile_init(&prof);
-+  error = lodepng_get_color_profile(&prof, image, w, h, mode_in);
-+  if(error) return error;
-+  mode_out->key_defined = 0;
-+
-+  if(prof.key && w * h <= 16)
-+  {
-+    prof.alpha = 1; /*too few pixels to justify tRNS chunk overhead*/
-+    if(prof.bits < 8) prof.bits = 8; /*PNG has no alphachannel modes with less than 8-bit per channel*/
-+  }
-+  grey_ok = !prof.colored && !prof.alpha; /*grey without alpha, with potentially low bits*/
-+  n = prof.numcolors;
-+  palettebits = n <= 2 ? 1 : (n <= 4 ? 2 : (n <= 16 ? 4 : 8));
-+  palette_ok = n <= 256 && (n * 2 < w * h) && prof.bits <= 8;
-+  if(w * h < n * 2) palette_ok = 0; /*don't add palette overhead if image has only a few pixels*/
-+  if(grey_ok && prof.bits <= palettebits) palette_ok = 0; /*grey is less overhead*/
-+
-+  if(palette_ok)
-+  {
-+    unsigned char* p = prof.palette;
-+    lodepng_palette_clear(mode_out); /*remove potential earlier palette*/
-+    for(i = 0; i != prof.numcolors; ++i)
-+    {
-+      error = lodepng_palette_add(mode_out, p[i * 4 + 0], p[i * 4 + 1], p[i * 4 + 2], p[i * 4 + 3]);
-+      if(error) break;
-+    }
-+
-+    mode_out->colortype = LCT_PALETTE;
-+    mode_out->bitdepth = palettebits;
-+
-+    if(mode_in->colortype == LCT_PALETTE && mode_in->palettesize >= mode_out->palettesize
-+        && mode_in->bitdepth == mode_out->bitdepth)
-+    {
-+      /*If input should have same palette colors, keep original to preserve its order and prevent conversion*/
-+      lodepng_color_mode_cleanup(mode_out);
-+      lodepng_color_mode_copy(mode_out, mode_in);
-+    }
-+  }
-+  else /*8-bit or 16-bit per channel*/
-+  {
-+    mode_out->bitdepth = prof.bits;
-+    mode_out->colortype = prof.alpha ? (prof.colored ? LCT_RGBA : LCT_GREY_ALPHA)
-+                                     : (prof.colored ? LCT_RGB : LCT_GREY);
-+
-+    if(prof.key && !prof.alpha)
-+    {
-+      unsigned mask = (1u << mode_out->bitdepth) - 1u; /*profile always uses 16-bit, mask converts it*/
-+      mode_out->key_r = prof.key_r & mask;
-+      mode_out->key_g = prof.key_g & mask;
-+      mode_out->key_b = prof.key_b & mask;
-+      mode_out->key_defined = 1;
-+    }
-+  }
-+
-+  return error;
-+}
-+
-+#endif /* #ifdef LODEPNG_COMPILE_ENCODER */
-+
-+/*
-+Paeth predicter, used by PNG filter type 4
-+The parameters are of type short, but should come from unsigned chars, the shorts
-+are only needed to make the paeth calculation correct.
-+*/
-+static unsigned char paethPredictor(short a, short b, short c)
-+{
-+  short pa = abs(b - c);
-+  short pb = abs(a - c);
-+  short pc = abs(a + b - c - c);
-+
-+  if(pc < pa && pc < pb) return (unsigned char)c;
-+  else if(pb < pa) return (unsigned char)b;
-+  else return (unsigned char)a;
-+}
-+
-+/*shared values used by multiple Adam7 related functions*/
-+
-+static const unsigned ADAM7_IX[7] = { 0, 4, 0, 2, 0, 1, 0 }; /*x start values*/
-+static const unsigned ADAM7_IY[7] = { 0, 0, 4, 0, 2, 0, 1 }; /*y start values*/
-+static const unsigned ADAM7_DX[7] = { 8, 8, 4, 4, 2, 2, 1 }; /*x delta values*/
-+static const unsigned ADAM7_DY[7] = { 8, 8, 8, 4, 4, 2, 2 }; /*y delta values*/
-+
-+/*
-+Outputs various dimensions and positions in the image related to the Adam7 reduced images.
-+passw: output containing the width of the 7 passes
-+passh: output containing the height of the 7 passes
-+filter_passstart: output containing the index of the start and end of each
-+ reduced image with filter bytes
-+padded_passstart output containing the index of the start and end of each
-+ reduced image when without filter bytes but with padded scanlines
-+passstart: output containing the index of the start and end of each reduced
-+ image without padding between scanlines, but still padding between the images
-+w, h: width and height of non-interlaced image
-+bpp: bits per pixel
-+"padded" is only relevant if bpp is less than 8 and a scanline or image does not
-+ end at a full byte
-+*/
-+static void Adam7_getpassvalues(unsigned passw[7], unsigned passh[7], size_t filter_passstart[8],
-+                                size_t padded_passstart[8], size_t passstart[8], unsigned w, unsigned h, unsigned bpp)
-+{
-+  /*the passstart values have 8 values: the 8th one indicates the byte after the end of the 7th (= last) pass*/
-+  unsigned i;
-+
-+  /*calculate width and height in pixels of each pass*/
-+  for(i = 0; i != 7; ++i)
-+  {
-+    passw[i] = (w + ADAM7_DX[i] - ADAM7_IX[i] - 1) / ADAM7_DX[i];
-+    passh[i] = (h + ADAM7_DY[i] - ADAM7_IY[i] - 1) / ADAM7_DY[i];
-+    if(passw[i] == 0) passh[i] = 0;
-+    if(passh[i] == 0) passw[i] = 0;
-+  }
-+
-+  filter_passstart[0] = padded_passstart[0] = passstart[0] = 0;
-+  for(i = 0; i != 7; ++i)
-+  {
-+    /*if passw[i] is 0, it's 0 bytes, not 1 (no filtertype-byte)*/
-+    filter_passstart[i + 1] = filter_passstart[i]
-+                            + ((passw[i] && passh[i]) ? passh[i] * (1 + (passw[i] * bpp + 7) / 8) : 0);
-+    /*bits padded if needed to fill full byte at end of each scanline*/
-+    padded_passstart[i + 1] = padded_passstart[i] + passh[i] * ((passw[i] * bpp + 7) / 8);
-+    /*only padded at end of reduced image*/
-+    passstart[i + 1] = passstart[i] + (passh[i] * passw[i] * bpp + 7) / 8;
-+  }
-+}
-+
-+#ifdef LODEPNG_COMPILE_DECODER
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* / PNG Decoder                                                            / */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+/*read the information from the header and store it in the LodePNGInfo. return value is error*/
-+unsigned lodepng_inspect(unsigned* w, unsigned* h, LodePNGState* state,
-+                         const unsigned char* in, size_t insize)
-+{
-+  LodePNGInfo* info = &state->info_png;
-+  if(insize == 0 || in == 0)
-+  {
-+    CERROR_RETURN_ERROR(state->error, 48); /*error: the given data is empty*/
-+  }
-+  if(insize < 33)
-+  {
-+    CERROR_RETURN_ERROR(state->error, 27); /*error: the data length is smaller than the length of a PNG header*/
-+  }
-+
-+  /*when decoding a new PNG image, make sure all parameters created after previous decoding are reset*/
-+  lodepng_info_cleanup(info);
-+  lodepng_info_init(info);
-+
-+  if(in[0] != 137 || in[1] != 80 || in[2] != 78 || in[3] != 71
-+     || in[4] != 13 || in[5] != 10 || in[6] != 26 || in[7] != 10)
-+  {
-+    CERROR_RETURN_ERROR(state->error, 28); /*error: the first 8 bytes are not the correct PNG signature*/
-+  }
-+  if(lodepng_chunk_length(in + 8) != 13)
-+  {
-+    CERROR_RETURN_ERROR(state->error, 94); /*error: header size must be 13 bytes*/
-+  }
-+  if(!lodepng_chunk_type_equals(in + 8, "IHDR"))
-+  {
-+    CERROR_RETURN_ERROR(state->error, 29); /*error: it doesn't start with a IHDR chunk!*/
-+  }
-+
-+  /*read the values given in the header*/
-+  *w = lodepng_read32bitInt(&in[16]);
-+  *h = lodepng_read32bitInt(&in[20]);
-+  info->color.bitdepth = in[24];
-+  info->color.colortype = (LodePNGColorType)in[25];
-+  info->compression_method = in[26];
-+  info->filter_method = in[27];
-+  info->interlace_method = in[28];
-+
-+  if(*w == 0 || *h == 0)
-+  {
-+    CERROR_RETURN_ERROR(state->error, 93);
-+  }
-+
-+  if(!state->decoder.ignore_crc)
-+  {
-+    unsigned CRC = lodepng_read32bitInt(&in[29]);
-+    unsigned checksum = lodepng_crc32(&in[12], 17);
-+    if(CRC != checksum)
-+    {
-+      CERROR_RETURN_ERROR(state->error, 57); /*invalid CRC*/
-+    }
-+  }
-+
-+  /*error: only compression method 0 is allowed in the specification*/
-+  if(info->compression_method != 0) CERROR_RETURN_ERROR(state->error, 32);
-+  /*error: only filter method 0 is allowed in the specification*/
-+  if(info->filter_method != 0) CERROR_RETURN_ERROR(state->error, 33);
-+  /*error: only interlace methods 0 and 1 exist in the specification*/
-+  if(info->interlace_method > 1) CERROR_RETURN_ERROR(state->error, 34);
-+
-+  state->error = checkColorValidity(info->color.colortype, info->color.bitdepth);
-+  return state->error;
-+}
-+
-+static unsigned unfilterScanline(unsigned char* recon, const unsigned char* scanline, const unsigned char* precon,
-+                                 size_t bytewidth, unsigned char filterType, size_t length)
-+{
-+  /*
-+  For PNG filter method 0
-+  unfilter a PNG image scanline by scanline. when the pixels are smaller than 1 byte,
-+  the filter works byte per byte (bytewidth = 1)
-+  precon is the previous unfiltered scanline, recon the result, scanline the current one
-+  the incoming scanlines do NOT include the filtertype byte, that one is given in the parameter filterType instead
-+  recon and scanline MAY be the same memory address! precon must be disjoint.
-+  */
-+
-+  size_t i;
-+  switch(filterType)
-+  {
-+    case 0:
-+      for(i = 0; i != length; ++i) recon[i] = scanline[i];
-+      break;
-+    case 1:
-+      for(i = 0; i != bytewidth; ++i) recon[i] = scanline[i];
-+      for(i = bytewidth; i < length; ++i) recon[i] = scanline[i] + recon[i - bytewidth];
-+      break;
-+    case 2:
-+      if(precon)
-+      {
-+        for(i = 0; i != length; ++i) recon[i] = scanline[i] + precon[i];
-+      }
-+      else
-+      {
-+        for(i = 0; i != length; ++i) recon[i] = scanline[i];
-+      }
-+      break;
-+    case 3:
-+      if(precon)
-+      {
-+        for(i = 0; i != bytewidth; ++i) recon[i] = scanline[i] + (precon[i] >> 1);
-+        for(i = bytewidth; i < length; ++i) recon[i] = scanline[i] + ((recon[i - bytewidth] + precon[i]) >> 1);
-+      }
-+      else
-+      {
-+        for(i = 0; i != bytewidth; ++i) recon[i] = scanline[i];
-+        for(i = bytewidth; i < length; ++i) recon[i] = scanline[i] + (recon[i - bytewidth] >> 1);
-+      }
-+      break;
-+    case 4:
-+      if(precon)
-+      {
-+        for(i = 0; i != bytewidth; ++i)
-+        {
-+          recon[i] = (scanline[i] + precon[i]); /*paethPredictor(0, precon[i], 0) is always precon[i]*/
-+        }
-+        for(i = bytewidth; i < length; ++i)
-+        {
-+          recon[i] = (scanline[i] + paethPredictor(recon[i - bytewidth], precon[i], precon[i - bytewidth]));
-+        }
-+      }
-+      else
-+      {
-+        for(i = 0; i != bytewidth; ++i)
-+        {
-+          recon[i] = scanline[i];
-+        }
-+        for(i = bytewidth; i < length; ++i)
-+        {
-+          /*paethPredictor(recon[i - bytewidth], 0, 0) is always recon[i - bytewidth]*/
-+          recon[i] = (scanline[i] + recon[i - bytewidth]);
-+        }
-+      }
-+      break;
-+    default: return 36; /*error: unexisting filter type given*/
-+  }
-+  return 0;
-+}
-+
-+static unsigned unfilter(unsigned char* out, const unsigned char* in, unsigned w, unsigned h, unsigned bpp)
-+{
-+  /*
-+  For PNG filter method 0
-+  this function unfilters a single image (e.g. without interlacing this is called once, with Adam7 seven times)
-+  out must have enough bytes allocated already, in must have the scanlines + 1 filtertype byte per scanline
-+  w and h are image dimensions or dimensions of reduced image, bpp is bits per pixel
-+  in and out are allowed to be the same memory address (but aren't the same size since in has the extra filter bytes)
-+  */
-+
-+  unsigned y;
-+  unsigned char* prevline = 0;
-+
-+  /*bytewidth is used for filtering, is 1 when bpp < 8, number of bytes per pixel otherwise*/
-+  size_t bytewidth = (bpp + 7) / 8;
-+  size_t linebytes = (w * bpp + 7) / 8;
-+
-+  for(y = 0; y < h; ++y)
-+  {
-+    size_t outindex = linebytes * y;
-+    size_t inindex = (1 + linebytes) * y; /*the extra filterbyte added to each row*/
-+    unsigned char filterType = in[inindex];
-+
-+    CERROR_TRY_RETURN(unfilterScanline(&out[outindex], &in[inindex + 1], prevline, bytewidth, filterType, linebytes));
-+
-+    prevline = &out[outindex];
-+  }
-+
-+  return 0;
-+}
-+
-+/*
-+in: Adam7 interlaced image, with no padding bits between scanlines, but between
-+ reduced images so that each reduced image starts at a byte.
-+out: the same pixels, but re-ordered so that they're now a non-interlaced image with size w*h
-+bpp: bits per pixel
-+out has the following size in bits: w * h * bpp.
-+in is possibly bigger due to padding bits between reduced images.
-+out must be big enough AND must be 0 everywhere if bpp < 8 in the current implementation
-+(because that's likely a little bit faster)
-+NOTE: comments about padding bits are only relevant if bpp < 8
-+*/
-+static void Adam7_deinterlace(unsigned char* out, const unsigned char* in, unsigned w, unsigned h, unsigned bpp)
-+{
-+  unsigned passw[7], passh[7];
-+  size_t filter_passstart[8], padded_passstart[8], passstart[8];
-+  unsigned i;
-+
-+  Adam7_getpassvalues(passw, passh, filter_passstart, padded_passstart, passstart, w, h, bpp);
-+
-+  if(bpp >= 8)
-+  {
-+    for(i = 0; i != 7; ++i)
-+    {
-+      unsigned x, y, b;
-+      size_t bytewidth = bpp / 8;
-+      for(y = 0; y < passh[i]; ++y)
-+      for(x = 0; x < passw[i]; ++x)
-+      {
-+        size_t pixelinstart = passstart[i] + (y * passw[i] + x) * bytewidth;
-+        size_t pixeloutstart = ((ADAM7_IY[i] + y * ADAM7_DY[i]) * w + ADAM7_IX[i] + x * ADAM7_DX[i]) * bytewidth;
-+        for(b = 0; b < bytewidth; ++b)
-+        {
-+          out[pixeloutstart + b] = in[pixelinstart + b];
-+        }
-+      }
-+    }
-+  }
-+  else /*bpp < 8: Adam7 with pixels < 8 bit is a bit trickier: with bit pointers*/
-+  {
-+    for(i = 0; i != 7; ++i)
-+    {
-+      unsigned x, y, b;
-+      unsigned ilinebits = bpp * passw[i];
-+      unsigned olinebits = bpp * w;
-+      size_t obp, ibp; /*bit pointers (for out and in buffer)*/
-+      for(y = 0; y < passh[i]; ++y)
-+      for(x = 0; x < passw[i]; ++x)
-+      {
-+        ibp = (8 * passstart[i]) + (y * ilinebits + x * bpp);
-+        obp = (ADAM7_IY[i] + y * ADAM7_DY[i]) * olinebits + (ADAM7_IX[i] + x * ADAM7_DX[i]) * bpp;
-+        for(b = 0; b < bpp; ++b)
-+        {
-+          unsigned char bit = readBitFromReversedStream(&ibp, in);
-+          /*note that this function assumes the out buffer is completely 0, use setBitOfReversedStream otherwise*/
-+          setBitOfReversedStream0(&obp, out, bit);
-+        }
-+      }
-+    }
-+  }
-+}
-+
-+static void removePaddingBits(unsigned char* out, const unsigned char* in,
-+                              size_t olinebits, size_t ilinebits, unsigned h)
-+{
-+  /*
-+  After filtering there are still padding bits if scanlines have non multiple of 8 bit amounts. They need
-+  to be removed (except at last scanline of (Adam7-reduced) image) before working with pure image buffers
-+  for the Adam7 code, the color convert code and the output to the user.
-+  in and out are allowed to be the same buffer, in may also be higher but still overlapping; in must
-+  have >= ilinebits*h bits, out must have >= olinebits*h bits, olinebits must be <= ilinebits
-+  also used to move bits after earlier such operations happened, e.g. in a sequence of reduced images from Adam7
-+  only useful if (ilinebits - olinebits) is a value in the range 1..7
-+  */
-+  unsigned y;
-+  size_t diff = ilinebits - olinebits;
-+  size_t ibp = 0, obp = 0; /*input and output bit pointers*/
-+  for(y = 0; y < h; ++y)
-+  {
-+    size_t x;
-+    for(x = 0; x < olinebits; ++x)
-+    {
-+      unsigned char bit = readBitFromReversedStream(&ibp, in);
-+      setBitOfReversedStream(&obp, out, bit);
-+    }
-+    ibp += diff;
-+  }
-+}
-+
-+/*out must be buffer big enough to contain full image, and in must contain the full decompressed data from
-+the IDAT chunks (with filter index bytes and possible padding bits)
-+return value is error*/
-+static unsigned postProcessScanlines(unsigned char* out, unsigned char* in,
-+                                     unsigned w, unsigned h, const LodePNGInfo* info_png)
-+{
-+  /*
-+  This function converts the filtered-padded-interlaced data into pure 2D image buffer with the PNG's colortype.
-+  Steps:
-+  *) if no Adam7: 1) unfilter 2) remove padding bits (= posible extra bits per scanline if bpp < 8)
-+  *) if adam7: 1) 7x unfilter 2) 7x remove padding bits 3) Adam7_deinterlace
-+  NOTE: the in buffer will be overwritten with intermediate data!
-+  */
-+  unsigned bpp = lodepng_get_bpp(&info_png->color);
-+  if(bpp == 0) return 31; /*error: invalid colortype*/
-+
-+  if(info_png->interlace_method == 0)
-+  {
-+    if(bpp < 8 && w * bpp != ((w * bpp + 7) / 8) * 8)
-+    {
-+      CERROR_TRY_RETURN(unfilter(in, in, w, h, bpp));
-+      removePaddingBits(out, in, w * bpp, ((w * bpp + 7) / 8) * 8, h);
-+    }
-+    /*we can immediately filter into the out buffer, no other steps needed*/
-+    else CERROR_TRY_RETURN(unfilter(out, in, w, h, bpp));
-+  }
-+  else /*interlace_method is 1 (Adam7)*/
-+  {
-+    unsigned passw[7], passh[7]; size_t filter_passstart[8], padded_passstart[8], passstart[8];
-+    unsigned i;
-+
-+    Adam7_getpassvalues(passw, passh, filter_passstart, padded_passstart, passstart, w, h, bpp);
-+
-+    for(i = 0; i != 7; ++i)
-+    {
-+      CERROR_TRY_RETURN(unfilter(&in[padded_passstart[i]], &in[filter_passstart[i]], passw[i], passh[i], bpp));
-+      /*TODO: possible efficiency improvement: if in this reduced image the bits fit nicely in 1 scanline,
-+      move bytes instead of bits or move not at all*/
-+      if(bpp < 8)
-+      {
-+        /*remove padding bits in scanlines; after this there still may be padding
-+        bits between the different reduced images: each reduced image still starts nicely at a byte*/
-+        removePaddingBits(&in[passstart[i]], &in[padded_passstart[i]], passw[i] * bpp,
-+                          ((passw[i] * bpp + 7) / 8) * 8, passh[i]);
-+      }
-+    }
-+
-+    Adam7_deinterlace(out, in, w, h, bpp);
-+  }
-+
-+  return 0;
-+}
-+
-+static unsigned readChunk_PLTE(LodePNGColorMode* color, const unsigned char* data, size_t chunkLength)
-+{
-+  unsigned pos = 0, i;
-+  if(color->palette) lodepng_free(color->palette);
-+  color->palettesize = chunkLength / 3;
-+  color->palette = (unsigned char*)lodepng_malloc(4 * color->palettesize);
-+  if(!color->palette && color->palettesize)
-+  {
-+    color->palettesize = 0;
-+    return 83; /*alloc fail*/
-+  }
-+  if(color->palettesize > 256) return 38; /*error: palette too big*/
-+
-+  for(i = 0; i != color->palettesize; ++i)
-+  {
-+    color->palette[4 * i + 0] = data[pos++]; /*R*/
-+    color->palette[4 * i + 1] = data[pos++]; /*G*/
-+    color->palette[4 * i + 2] = data[pos++]; /*B*/
-+    color->palette[4 * i + 3] = 255; /*alpha*/
-+  }
-+
-+  return 0; /* OK */
-+}
-+
-+static unsigned readChunk_tRNS(LodePNGColorMode* color, const unsigned char* data, size_t chunkLength)
-+{
-+  unsigned i;
-+  if(color->colortype == LCT_PALETTE)
-+  {
-+    /*error: more alpha values given than there are palette entries*/
-+    if(chunkLength > color->palettesize) return 38;
-+
-+    for(i = 0; i != chunkLength; ++i) color->palette[4 * i + 3] = data[i];
-+  }
-+  else if(color->colortype == LCT_GREY)
-+  {
-+    /*error: this chunk must be 2 bytes for greyscale image*/
-+    if(chunkLength != 2) return 30;
-+
-+    color->key_defined = 1;
-+    color->key_r = color->key_g = color->key_b = 256u * data[0] + data[1];
-+  }
-+  else if(color->colortype == LCT_RGB)
-+  {
-+    /*error: this chunk must be 6 bytes for RGB image*/
-+    if(chunkLength != 6) return 41;
-+
-+    color->key_defined = 1;
-+    color->key_r = 256u * data[0] + data[1];
-+    color->key_g = 256u * data[2] + data[3];
-+    color->key_b = 256u * data[4] + data[5];
-+  }
-+  else return 42; /*error: tRNS chunk not allowed for other color models*/
-+
-+  return 0; /* OK */
-+}
-+
-+
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+/*background color chunk (bKGD)*/
-+static unsigned readChunk_bKGD(LodePNGInfo* info, const unsigned char* data, size_t chunkLength)
-+{
-+  if(info->color.colortype == LCT_PALETTE)
-+  {
-+    /*error: this chunk must be 1 byte for indexed color image*/
-+    if(chunkLength != 1) return 43;
-+
-+    info->background_defined = 1;
-+    info->background_r = info->background_g = info->background_b = data[0];
-+  }
-+  else if(info->color.colortype == LCT_GREY || info->color.colortype == LCT_GREY_ALPHA)
-+  {
-+    /*error: this chunk must be 2 bytes for greyscale image*/
-+    if(chunkLength != 2) return 44;
-+
-+    info->background_defined = 1;
-+    info->background_r = info->background_g = info->background_b = 256u * data[0] + data[1];
-+  }
-+  else if(info->color.colortype == LCT_RGB || info->color.colortype == LCT_RGBA)
-+  {
-+    /*error: this chunk must be 6 bytes for greyscale image*/
-+    if(chunkLength != 6) return 45;
-+
-+    info->background_defined = 1;
-+    info->background_r = 256u * data[0] + data[1];
-+    info->background_g = 256u * data[2] + data[3];
-+    info->background_b = 256u * data[4] + data[5];
-+  }
-+
-+  return 0; /* OK */
-+}
-+
-+/*text chunk (tEXt)*/
-+static unsigned readChunk_tEXt(LodePNGInfo* info, const unsigned char* data, size_t chunkLength)
-+{
-+  unsigned error = 0;
-+  char *key = 0, *str = 0;
-+  unsigned i;
-+
-+  while(!error) /*not really a while loop, only used to break on error*/
-+  {
-+    unsigned length, string2_begin;
-+
-+    length = 0;
-+    while(length < chunkLength && data[length] != 0) ++length;
-+    /*even though it's not allowed by the standard, no error is thrown if
-+    there's no null termination char, if the text is empty*/
-+    if(length < 1 || length > 79) CERROR_BREAK(error, 89); /*keyword too short or long*/
-+
-+    key = (char*)lodepng_malloc(length + 1);
-+    if(!key) CERROR_BREAK(error, 83); /*alloc fail*/
-+
-+    key[length] = 0;
-+    for(i = 0; i != length; ++i) key[i] = (char)data[i];
-+
-+    string2_begin = length + 1; /*skip keyword null terminator*/
-+
-+    length = chunkLength < string2_begin ? 0 : chunkLength - string2_begin;
-+    str = (char*)lodepng_malloc(length + 1);
-+    if(!str) CERROR_BREAK(error, 83); /*alloc fail*/
-+
-+    str[length] = 0;
-+    for(i = 0; i != length; ++i) str[i] = (char)data[string2_begin + i];
-+
-+    error = lodepng_add_text(info, key, str);
-+
-+    break;
-+  }
-+
-+  lodepng_free(key);
-+  lodepng_free(str);
-+
-+  return error;
-+}
-+
-+/*compressed text chunk (zTXt)*/
-+static unsigned readChunk_zTXt(LodePNGInfo* info, const LodePNGDecompressSettings* zlibsettings,
-+                               const unsigned char* data, size_t chunkLength)
-+{
-+  unsigned error = 0;
-+  unsigned i;
-+
-+  unsigned length, string2_begin;
-+  char *key = 0;
-+  ucvector decoded;
-+
-+  ucvector_init(&decoded);
-+
-+  while(!error) /*not really a while loop, only used to break on error*/
-+  {
-+    for(length = 0; length < chunkLength && data[length] != 0; ++length) ;
-+    if(length + 2 >= chunkLength) CERROR_BREAK(error, 75); /*no null termination, corrupt?*/
-+    if(length < 1 || length > 79) CERROR_BREAK(error, 89); /*keyword too short or long*/
-+
-+    key = (char*)lodepng_malloc(length + 1);
-+    if(!key) CERROR_BREAK(error, 83); /*alloc fail*/
-+
-+    key[length] = 0;
-+    for(i = 0; i != length; ++i) key[i] = (char)data[i];
-+
-+    if(data[length + 1] != 0) CERROR_BREAK(error, 72); /*the 0 byte indicating compression must be 0*/
-+
-+    string2_begin = length + 2;
-+    if(string2_begin > chunkLength) CERROR_BREAK(error, 75); /*no null termination, corrupt?*/
-+
-+    length = chunkLength - string2_begin;
-+    /*will fail if zlib error, e.g. if length is too small*/
-+    error = zlib_decompress(&decoded.data, &decoded.size,
-+                            (unsigned char*)(&data[string2_begin]),
-+                            length, zlibsettings);
-+    if(error) break;
-+    ucvector_push_back(&decoded, 0);
-+
-+    error = lodepng_add_text(info, key, (char*)decoded.data);
-+
-+    break;
-+  }
-+
-+  lodepng_free(key);
-+  ucvector_cleanup(&decoded);
-+
-+  return error;
-+}
-+
-+/*international text chunk (iTXt)*/
-+static unsigned readChunk_iTXt(LodePNGInfo* info, const LodePNGDecompressSettings* zlibsettings,
-+                               const unsigned char* data, size_t chunkLength)
-+{
-+  unsigned error = 0;
-+  unsigned i;
-+
-+  unsigned length, begin, compressed;
-+  char *key = 0, *langtag = 0, *transkey = 0;
-+  ucvector decoded;
-+  ucvector_init(&decoded);
-+
-+  while(!error) /*not really a while loop, only used to break on error*/
-+  {
-+    /*Quick check if the chunk length isn't too small. Even without check
-+    it'd still fail with other error checks below if it's too short. This just gives a different error code.*/
-+    if(chunkLength < 5) CERROR_BREAK(error, 30); /*iTXt chunk too short*/
-+
-+    /*read the key*/
-+    for(length = 0; length < chunkLength && data[length] != 0; ++length) ;
-+    if(length + 3 >= chunkLength) CERROR_BREAK(error, 75); /*no null termination char, corrupt?*/
-+    if(length < 1 || length > 79) CERROR_BREAK(error, 89); /*keyword too short or long*/
-+
-+    key = (char*)lodepng_malloc(length + 1);
-+    if(!key) CERROR_BREAK(error, 83); /*alloc fail*/
-+
-+    key[length] = 0;
-+    for(i = 0; i != length; ++i) key[i] = (char)data[i];
-+
-+    /*read the compression method*/
-+    compressed = data[length + 1];
-+    if(data[length + 2] != 0) CERROR_BREAK(error, 72); /*the 0 byte indicating compression must be 0*/
-+
-+    /*even though it's not allowed by the standard, no error is thrown if
-+    there's no null termination char, if the text is empty for the next 3 texts*/
-+
-+    /*read the langtag*/
-+    begin = length + 3;
-+    length = 0;
-+    for(i = begin; i < chunkLength && data[i] != 0; ++i) ++length;
-+
-+    langtag = (char*)lodepng_malloc(length + 1);
-+    if(!langtag) CERROR_BREAK(error, 83); /*alloc fail*/
-+
-+    langtag[length] = 0;
-+    for(i = 0; i != length; ++i) langtag[i] = (char)data[begin + i];
-+
-+    /*read the transkey*/
-+    begin += length + 1;
-+    length = 0;
-+    for(i = begin; i < chunkLength && data[i] != 0; ++i) ++length;
-+
-+    transkey = (char*)lodepng_malloc(length + 1);
-+    if(!transkey) CERROR_BREAK(error, 83); /*alloc fail*/
-+
-+    transkey[length] = 0;
-+    for(i = 0; i != length; ++i) transkey[i] = (char)data[begin + i];
-+
-+    /*read the actual text*/
-+    begin += length + 1;
-+
-+    length = chunkLength < begin ? 0 : chunkLength - begin;
-+
-+    if(compressed)
-+    {
-+      /*will fail if zlib error, e.g. if length is too small*/
-+      error = zlib_decompress(&decoded.data, &decoded.size,
-+                              (unsigned char*)(&data[begin]),
-+                              length, zlibsettings);
-+      if(error) break;
-+      if(decoded.allocsize < decoded.size) decoded.allocsize = decoded.size;
-+      ucvector_push_back(&decoded, 0);
-+    }
-+    else
-+    {
-+      if(!ucvector_resize(&decoded, length + 1)) CERROR_BREAK(error, 83 /*alloc fail*/);
-+
-+      decoded.data[length] = 0;
-+      for(i = 0; i != length; ++i) decoded.data[i] = data[begin + i];
-+    }
-+
-+    error = lodepng_add_itext(info, key, langtag, transkey, (char*)decoded.data);
-+
-+    break;
-+  }
-+
-+  lodepng_free(key);
-+  lodepng_free(langtag);
-+  lodepng_free(transkey);
-+  ucvector_cleanup(&decoded);
-+
-+  return error;
-+}
-+
-+static unsigned readChunk_tIME(LodePNGInfo* info, const unsigned char* data, size_t chunkLength)
-+{
-+  if(chunkLength != 7) return 73; /*invalid tIME chunk size*/
-+
-+  info->time_defined = 1;
-+  info->time.year = 256u * data[0] + data[1];
-+  info->time.month = data[2];
-+  info->time.day = data[3];
-+  info->time.hour = data[4];
-+  info->time.minute = data[5];
-+  info->time.second = data[6];
-+
-+  return 0; /* OK */
-+}
-+
-+static unsigned readChunk_pHYs(LodePNGInfo* info, const unsigned char* data, size_t chunkLength)
-+{
-+  if(chunkLength != 9) return 74; /*invalid pHYs chunk size*/
-+
-+  info->phys_defined = 1;
-+  info->phys_x = 16777216u * data[0] + 65536u * data[1] + 256u * data[2] + data[3];
-+  info->phys_y = 16777216u * data[4] + 65536u * data[5] + 256u * data[6] + data[7];
-+  info->phys_unit = data[8];
-+
-+  return 0; /* OK */
-+}
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+
-+/*read a PNG, the result will be in the same color type as the PNG (hence "generic")*/
-+static void decodeGeneric(unsigned char** out, unsigned* w, unsigned* h,
-+                          LodePNGState* state,
-+                          const unsigned char* in, size_t insize)
-+{
-+  unsigned char IEND = 0;
-+  const unsigned char* chunk;
-+  size_t i;
-+  ucvector idat; /*the data from idat chunks*/
-+  ucvector scanlines;
-+  size_t predict;
-+  size_t numpixels;
-+  size_t outsize;
-+
-+  /*for unknown chunk order*/
-+  unsigned unknown = 0;
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+  unsigned critical_pos = 1; /*1 = after IHDR, 2 = after PLTE, 3 = after IDAT*/
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+
-+  /*provide some proper output values if error will happen*/
-+  *out = 0;
-+
-+  state->error = lodepng_inspect(w, h, state, in, insize); /*reads header and resets other parameters in state->info_png*/
-+  if(state->error) return;
-+
-+  numpixels = *w * *h;
-+
-+  /*multiplication overflow*/
-+  if(*h != 0 && numpixels / *h != *w) CERROR_RETURN(state->error, 92);
-+  /*multiplication overflow possible further below. Allows up to 2^31-1 pixel
-+  bytes with 16-bit RGBA, the rest is room for filter bytes.*/
-+  if(numpixels > 268435455) CERROR_RETURN(state->error, 92);
-+
-+  ucvector_init(&idat);
-+  chunk = &in[33]; /*first byte of the first chunk after the header*/
-+
-+  /*loop through the chunks, ignoring unknown chunks and stopping at IEND chunk.
-+  IDAT data is put at the start of the in buffer*/
-+  while(!IEND && !state->error)
-+  {
-+    unsigned chunkLength;
-+    const unsigned char* data; /*the data in the chunk*/
-+
-+    /*error: size of the in buffer too small to contain next chunk*/
-+    if((size_t)((chunk - in) + 12) > insize || chunk < in) CERROR_BREAK(state->error, 30);
-+
-+    /*length of the data of the chunk, excluding the length bytes, chunk type and CRC bytes*/
-+    chunkLength = lodepng_chunk_length(chunk);
-+    /*error: chunk length larger than the max PNG chunk size*/
-+    if(chunkLength > 2147483647) CERROR_BREAK(state->error, 63);
-+
-+    if((size_t)((chunk - in) + chunkLength + 12) > insize || (chunk + chunkLength + 12) < in)
-+    {
-+      CERROR_BREAK(state->error, 64); /*error: size of the in buffer too small to contain next chunk*/
-+    }
-+
-+    data = lodepng_chunk_data_const(chunk);
-+
-+    /*IDAT chunk, containing compressed image data*/
-+    if(lodepng_chunk_type_equals(chunk, "IDAT"))
-+    {
-+      size_t oldsize = idat.size;
-+      if(!ucvector_resize(&idat, oldsize + chunkLength)) CERROR_BREAK(state->error, 83 /*alloc fail*/);
-+      for(i = 0; i != chunkLength; ++i) idat.data[oldsize + i] = data[i];
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+      critical_pos = 3;
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+    }
-+    /*IEND chunk*/
-+    else if(lodepng_chunk_type_equals(chunk, "IEND"))
-+    {
-+      IEND = 1;
-+    }
-+    /*palette chunk (PLTE)*/
-+    else if(lodepng_chunk_type_equals(chunk, "PLTE"))
-+    {
-+      state->error = readChunk_PLTE(&state->info_png.color, data, chunkLength);
-+      if(state->error) break;
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+      critical_pos = 2;
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+    }
-+    /*palette transparency chunk (tRNS)*/
-+    else if(lodepng_chunk_type_equals(chunk, "tRNS"))
-+    {
-+      state->error = readChunk_tRNS(&state->info_png.color, data, chunkLength);
-+      if(state->error) break;
-+    }
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+    /*background color chunk (bKGD)*/
-+    else if(lodepng_chunk_type_equals(chunk, "bKGD"))
-+    {
-+      state->error = readChunk_bKGD(&state->info_png, data, chunkLength);
-+      if(state->error) break;
-+    }
-+    /*text chunk (tEXt)*/
-+    else if(lodepng_chunk_type_equals(chunk, "tEXt"))
-+    {
-+      if(state->decoder.read_text_chunks)
-+      {
-+        state->error = readChunk_tEXt(&state->info_png, data, chunkLength);
-+        if(state->error) break;
-+      }
-+    }
-+    /*compressed text chunk (zTXt)*/
-+    else if(lodepng_chunk_type_equals(chunk, "zTXt"))
-+    {
-+      if(state->decoder.read_text_chunks)
-+      {
-+        state->error = readChunk_zTXt(&state->info_png, &state->decoder.zlibsettings, data, chunkLength);
-+        if(state->error) break;
-+      }
-+    }
-+    /*international text chunk (iTXt)*/
-+    else if(lodepng_chunk_type_equals(chunk, "iTXt"))
-+    {
-+      if(state->decoder.read_text_chunks)
-+      {
-+        state->error = readChunk_iTXt(&state->info_png, &state->decoder.zlibsettings, data, chunkLength);
-+        if(state->error) break;
-+      }
-+    }
-+    else if(lodepng_chunk_type_equals(chunk, "tIME"))
-+    {
-+      state->error = readChunk_tIME(&state->info_png, data, chunkLength);
-+      if(state->error) break;
-+    }
-+    else if(lodepng_chunk_type_equals(chunk, "pHYs"))
-+    {
-+      state->error = readChunk_pHYs(&state->info_png, data, chunkLength);
-+      if(state->error) break;
-+    }
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+    else /*it's not an implemented chunk type, so ignore it: skip over the data*/
-+    {
-+      /*error: unknown critical chunk (5th bit of first byte of chunk type is 0)*/
-+      if(!lodepng_chunk_ancillary(chunk)) CERROR_BREAK(state->error, 69);
-+
-+      unknown = 1;
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+      if(state->decoder.remember_unknown_chunks)
-+      {
-+        state->error = lodepng_chunk_append(&state->info_png.unknown_chunks_data[critical_pos - 1],
-+                                            &state->info_png.unknown_chunks_size[critical_pos - 1], chunk);
-+        if(state->error) break;
-+      }
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+    }
-+
-+    if(!state->decoder.ignore_crc && !unknown) /*check CRC if wanted, only on known chunk types*/
-+    {
-+      if(lodepng_chunk_check_crc(chunk)) CERROR_BREAK(state->error, 57); /*invalid CRC*/
-+    }
-+
-+    if(!IEND) chunk = lodepng_chunk_next_const(chunk);
-+  }
-+
-+  ucvector_init(&scanlines);
-+  /*predict output size, to allocate exact size for output buffer to avoid more dynamic allocation.
-+  If the decompressed size does not match the prediction, the image must be corrupt.*/
-+  if(state->info_png.interlace_method == 0)
-+  {
-+    /*The extra *h is added because this are the filter bytes every scanline starts with*/
-+    predict = lodepng_get_raw_size_idat(*w, *h, &state->info_png.color) + *h;
-+  }
-+  else
-+  {
-+    /*Adam-7 interlaced: predicted size is the sum of the 7 sub-images sizes*/
-+    const LodePNGColorMode* color = &state->info_png.color;
-+    predict = 0;
-+    predict += lodepng_get_raw_size_idat((*w + 7) >> 3, (*h + 7) >> 3, color) + ((*h + 7) >> 3);
-+    if(*w > 4) predict += lodepng_get_raw_size_idat((*w + 3) >> 3, (*h + 7) >> 3, color) + ((*h + 7) >> 3);
-+    predict += lodepng_get_raw_size_idat((*w + 3) >> 2, (*h + 3) >> 3, color) + ((*h + 3) >> 3);
-+    if(*w > 2) predict += lodepng_get_raw_size_idat((*w + 1) >> 2, (*h + 3) >> 2, color) + ((*h + 3) >> 2);
-+    predict += lodepng_get_raw_size_idat((*w + 1) >> 1, (*h + 1) >> 2, color) + ((*h + 1) >> 2);
-+    if(*w > 1) predict += lodepng_get_raw_size_idat((*w + 0) >> 1, (*h + 1) >> 1, color) + ((*h + 1) >> 1);
-+    predict += lodepng_get_raw_size_idat((*w + 0), (*h + 0) >> 1, color) + ((*h + 0) >> 1);
-+  }
-+  if(!state->error && !ucvector_reserve(&scanlines, predict)) state->error = 83; /*alloc fail*/
-+  if(!state->error)
-+  {
-+    state->error = zlib_decompress(&scanlines.data, &scanlines.size, idat.data,
-+                                   idat.size, &state->decoder.zlibsettings);
-+    if(!state->error && scanlines.size != predict) state->error = 91; /*decompressed size doesn't match prediction*/
-+  }
-+  ucvector_cleanup(&idat);
-+
-+  if(!state->error)
-+  {
-+    outsize = lodepng_get_raw_size(*w, *h, &state->info_png.color);
-+    *out = (unsigned char*)lodepng_malloc(outsize);
-+    if(!*out) state->error = 83; /*alloc fail*/
-+  }
-+  if(!state->error)
-+  {
-+    for(i = 0; i < outsize; i++) (*out)[i] = 0;
-+    state->error = postProcessScanlines(*out, scanlines.data, *w, *h, &state->info_png);
-+  }
-+  ucvector_cleanup(&scanlines);
-+}
-+
-+unsigned lodepng_decode(unsigned char** out, unsigned* w, unsigned* h,
-+                        LodePNGState* state,
-+                        const unsigned char* in, size_t insize)
-+{
-+  *out = 0;
-+  decodeGeneric(out, w, h, state, in, insize);
-+  if(state->error) return state->error;
-+  if(!state->decoder.color_convert || lodepng_color_mode_equal(&state->info_raw, &state->info_png.color))
-+  {
-+    /*same color type, no copying or converting of data needed*/
-+    /*store the info_png color settings on the info_raw so that the info_raw still reflects what colortype
-+    the raw image has to the end user*/
-+    if(!state->decoder.color_convert)
-+    {
-+      state->error = lodepng_color_mode_copy(&state->info_raw, &state->info_png.color);
-+      if(state->error) return state->error;
-+    }
-+  }
-+  else
-+  {
-+    /*color conversion needed; sort of copy of the data*/
-+    unsigned char* data = *out;
-+    size_t outsize;
-+
-+    /*TODO: check if this works according to the statement in the documentation: "The converter can convert
-+    from greyscale input color type, to 8-bit greyscale or greyscale with alpha"*/
-+    if(!(state->info_raw.colortype == LCT_RGB || state->info_raw.colortype == LCT_RGBA)
-+       && !(state->info_raw.bitdepth == 8))
-+    {
-+      return 56; /*unsupported color mode conversion*/
-+    }
-+
-+    outsize = lodepng_get_raw_size(*w, *h, &state->info_raw);
-+    *out = (unsigned char*)lodepng_malloc(outsize);
-+    if(!(*out))
-+    {
-+      state->error = 83; /*alloc fail*/
-+    }
-+    else state->error = lodepng_convert(*out, data, &state->info_raw,
-+                                        &state->info_png.color, *w, *h);
-+    lodepng_free(data);
-+  }
-+  return state->error;
-+}
-+
-+unsigned lodepng_decode_memory(unsigned char** out, unsigned* w, unsigned* h, const unsigned char* in,
-+                               size_t insize, LodePNGColorType colortype, unsigned bitdepth)
-+{
-+  unsigned error;
-+  LodePNGState state;
-+  lodepng_state_init(&state);
-+  state.info_raw.colortype = colortype;
-+  state.info_raw.bitdepth = bitdepth;
-+  error = lodepng_decode(out, w, h, &state, in, insize);
-+  lodepng_state_cleanup(&state);
-+  return error;
-+}
-+
-+unsigned lodepng_decode32(unsigned char** out, unsigned* w, unsigned* h, const unsigned char* in, size_t insize)
-+{
-+  return lodepng_decode_memory(out, w, h, in, insize, LCT_RGBA, 8);
-+}
-+
-+unsigned lodepng_decode24(unsigned char** out, unsigned* w, unsigned* h, const unsigned char* in, size_t insize)
-+{
-+  return lodepng_decode_memory(out, w, h, in, insize, LCT_RGB, 8);
-+}
-+
-+#ifdef LODEPNG_COMPILE_DISK
-+unsigned lodepng_decode_file(unsigned char** out, unsigned* w, unsigned* h, const char* filename,
-+                             LodePNGColorType colortype, unsigned bitdepth)
-+{
-+  unsigned char* buffer = 0;
-+  size_t buffersize;
-+  unsigned error;
-+  error = lodepng_load_file(&buffer, &buffersize, filename);
-+  if(!error) error = lodepng_decode_memory(out, w, h, buffer, buffersize, colortype, bitdepth);
-+  lodepng_free(buffer);
-+  return error;
-+}
-+
-+unsigned lodepng_decode32_file(unsigned char** out, unsigned* w, unsigned* h, const char* filename)
-+{
-+  return lodepng_decode_file(out, w, h, filename, LCT_RGBA, 8);
-+}
-+
-+unsigned lodepng_decode24_file(unsigned char** out, unsigned* w, unsigned* h, const char* filename)
-+{
-+  return lodepng_decode_file(out, w, h, filename, LCT_RGB, 8);
-+}
-+#endif /*LODEPNG_COMPILE_DISK*/
-+
-+void lodepng_decoder_settings_init(LodePNGDecoderSettings* settings)
-+{
-+  settings->color_convert = 1;
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+  settings->read_text_chunks = 1;
-+  settings->remember_unknown_chunks = 0;
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+  settings->ignore_crc = 0;
-+  lodepng_decompress_settings_init(&settings->zlibsettings);
-+}
-+
-+#endif /*LODEPNG_COMPILE_DECODER*/
-+
-+#if defined(LODEPNG_COMPILE_DECODER) || defined(LODEPNG_COMPILE_ENCODER)
-+
-+void lodepng_state_init(LodePNGState* state)
-+{
-+#ifdef LODEPNG_COMPILE_DECODER
-+  lodepng_decoder_settings_init(&state->decoder);
-+#endif /*LODEPNG_COMPILE_DECODER*/
-+#ifdef LODEPNG_COMPILE_ENCODER
-+  lodepng_encoder_settings_init(&state->encoder);
-+#endif /*LODEPNG_COMPILE_ENCODER*/
-+  lodepng_color_mode_init(&state->info_raw);
-+  lodepng_info_init(&state->info_png);
-+  state->error = 1;
-+}
-+
-+void lodepng_state_cleanup(LodePNGState* state)
-+{
-+  lodepng_color_mode_cleanup(&state->info_raw);
-+  lodepng_info_cleanup(&state->info_png);
-+}
-+
-+void lodepng_state_copy(LodePNGState* dest, const LodePNGState* source)
-+{
-+  lodepng_state_cleanup(dest);
-+  *dest = *source;
-+  lodepng_color_mode_init(&dest->info_raw);
-+  lodepng_info_init(&dest->info_png);
-+  dest->error = lodepng_color_mode_copy(&dest->info_raw, &source->info_raw); if(dest->error) return;
-+  dest->error = lodepng_info_copy(&dest->info_png, &source->info_png); if(dest->error) return;
-+}
-+
-+#endif /* defined(LODEPNG_COMPILE_DECODER) || defined(LODEPNG_COMPILE_ENCODER) */
-+
-+#ifdef LODEPNG_COMPILE_ENCODER
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* / PNG Encoder                                                            / */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+/*chunkName must be string of 4 characters*/
-+static unsigned addChunk(ucvector* out, const char* chunkName, const unsigned char* data, size_t length)
-+{
-+  CERROR_TRY_RETURN(lodepng_chunk_create(&out->data, &out->size, (unsigned)length, chunkName, data));
-+  out->allocsize = out->size; /*fix the allocsize again*/
-+  return 0;
-+}
-+
-+static void writeSignature(ucvector* out)
-+{
-+  /*8 bytes PNG signature, aka the magic bytes*/
-+  ucvector_push_back(out, 137);
-+  ucvector_push_back(out, 80);
-+  ucvector_push_back(out, 78);
-+  ucvector_push_back(out, 71);
-+  ucvector_push_back(out, 13);
-+  ucvector_push_back(out, 10);
-+  ucvector_push_back(out, 26);
-+  ucvector_push_back(out, 10);
-+}
-+
-+static unsigned addChunk_IHDR(ucvector* out, unsigned w, unsigned h,
-+                              LodePNGColorType colortype, unsigned bitdepth, unsigned interlace_method)
-+{
-+  unsigned error = 0;
-+  ucvector header;
-+  ucvector_init(&header);
-+
-+  lodepng_add32bitInt(&header, w); /*width*/
-+  lodepng_add32bitInt(&header, h); /*height*/
-+  ucvector_push_back(&header, (unsigned char)bitdepth); /*bit depth*/
-+  ucvector_push_back(&header, (unsigned char)colortype); /*color type*/
-+  ucvector_push_back(&header, 0); /*compression method*/
-+  ucvector_push_back(&header, 0); /*filter method*/
-+  ucvector_push_back(&header, interlace_method); /*interlace method*/
-+
-+  error = addChunk(out, "IHDR", header.data, header.size);
-+  ucvector_cleanup(&header);
-+
-+  return error;
-+}
-+
-+static unsigned addChunk_PLTE(ucvector* out, const LodePNGColorMode* info)
-+{
-+  unsigned error = 0;
-+  size_t i;
-+  ucvector PLTE;
-+  ucvector_init(&PLTE);
-+  for(i = 0; i != info->palettesize * 4; ++i)
-+  {
-+    /*add all channels except alpha channel*/
-+    if(i % 4 != 3) ucvector_push_back(&PLTE, info->palette[i]);
-+  }
-+  error = addChunk(out, "PLTE", PLTE.data, PLTE.size);
-+  ucvector_cleanup(&PLTE);
-+
-+  return error;
-+}
-+
-+static unsigned addChunk_tRNS(ucvector* out, const LodePNGColorMode* info)
-+{
-+  unsigned error = 0;
-+  size_t i;
-+  ucvector tRNS;
-+  ucvector_init(&tRNS);
-+  if(info->colortype == LCT_PALETTE)
-+  {
-+    size_t amount = info->palettesize;
-+    /*the tail of palette values that all have 255 as alpha, does not have to be encoded*/
-+    for(i = info->palettesize; i != 0; --i)
-+    {
-+      if(info->palette[4 * (i - 1) + 3] == 255) --amount;
-+      else break;
-+    }
-+    /*add only alpha channel*/
-+    for(i = 0; i != amount; ++i) ucvector_push_back(&tRNS, info->palette[4 * i + 3]);
-+  }
-+  else if(info->colortype == LCT_GREY)
-+  {
-+    if(info->key_defined)
-+    {
-+      ucvector_push_back(&tRNS, (unsigned char)(info->key_r >> 8));
-+      ucvector_push_back(&tRNS, (unsigned char)(info->key_r & 255));
-+    }
-+  }
-+  else if(info->colortype == LCT_RGB)
-+  {
-+    if(info->key_defined)
-+    {
-+      ucvector_push_back(&tRNS, (unsigned char)(info->key_r >> 8));
-+      ucvector_push_back(&tRNS, (unsigned char)(info->key_r & 255));
-+      ucvector_push_back(&tRNS, (unsigned char)(info->key_g >> 8));
-+      ucvector_push_back(&tRNS, (unsigned char)(info->key_g & 255));
-+      ucvector_push_back(&tRNS, (unsigned char)(info->key_b >> 8));
-+      ucvector_push_back(&tRNS, (unsigned char)(info->key_b & 255));
-+    }
-+  }
-+
-+  error = addChunk(out, "tRNS", tRNS.data, tRNS.size);
-+  ucvector_cleanup(&tRNS);
-+
-+  return error;
-+}
-+
-+static unsigned addChunk_IDAT(ucvector* out, const unsigned char* data, size_t datasize,
-+                              LodePNGCompressSettings* zlibsettings)
-+{
-+  ucvector zlibdata;
-+  unsigned error = 0;
-+
-+  /*compress with the Zlib compressor*/
-+  ucvector_init(&zlibdata);
-+  error = zlib_compress(&zlibdata.data, &zlibdata.size, data, datasize, zlibsettings);
-+  if(!error) error = addChunk(out, "IDAT", zlibdata.data, zlibdata.size);
-+  ucvector_cleanup(&zlibdata);
-+
-+  return error;
-+}
-+
-+static unsigned addChunk_IEND(ucvector* out)
-+{
-+  unsigned error = 0;
-+  error = addChunk(out, "IEND", 0, 0);
-+  return error;
-+}
-+
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+
-+static unsigned addChunk_tEXt(ucvector* out, const char* keyword, const char* textstring)
-+{
-+  unsigned error = 0;
-+  size_t i;
-+  ucvector text;
-+  ucvector_init(&text);
-+  for(i = 0; keyword[i] != 0; ++i) ucvector_push_back(&text, (unsigned char)keyword[i]);
-+  if(i < 1 || i > 79) return 89; /*error: invalid keyword size*/
-+  ucvector_push_back(&text, 0); /*0 termination char*/
-+  for(i = 0; textstring[i] != 0; ++i) ucvector_push_back(&text, (unsigned char)textstring[i]);
-+  error = addChunk(out, "tEXt", text.data, text.size);
-+  ucvector_cleanup(&text);
-+
-+  return error;
-+}
-+
-+static unsigned addChunk_zTXt(ucvector* out, const char* keyword, const char* textstring,
-+                              LodePNGCompressSettings* zlibsettings)
-+{
-+  unsigned error = 0;
-+  ucvector data, compressed;
-+  size_t i, textsize = strlen(textstring);
-+
-+  ucvector_init(&data);
-+  ucvector_init(&compressed);
-+  for(i = 0; keyword[i] != 0; ++i) ucvector_push_back(&data, (unsigned char)keyword[i]);
-+  if(i < 1 || i > 79) return 89; /*error: invalid keyword size*/
-+  ucvector_push_back(&data, 0); /*0 termination char*/
-+  ucvector_push_back(&data, 0); /*compression method: 0*/
-+
-+  error = zlib_compress(&compressed.data, &compressed.size,
-+                        (unsigned char*)textstring, textsize, zlibsettings);
-+  if(!error)
-+  {
-+    for(i = 0; i != compressed.size; ++i) ucvector_push_back(&data, compressed.data[i]);
-+    error = addChunk(out, "zTXt", data.data, data.size);
-+  }
-+
-+  ucvector_cleanup(&compressed);
-+  ucvector_cleanup(&data);
-+  return error;
-+}
-+
-+static unsigned addChunk_iTXt(ucvector* out, unsigned compressed, const char* keyword, const char* langtag,
-+                              const char* transkey, const char* textstring, LodePNGCompressSettings* zlibsettings)
-+{
-+  unsigned error = 0;
-+  ucvector data;
-+  size_t i, textsize = strlen(textstring);
-+
-+  ucvector_init(&data);
-+
-+  for(i = 0; keyword[i] != 0; ++i) ucvector_push_back(&data, (unsigned char)keyword[i]);
-+  if(i < 1 || i > 79) return 89; /*error: invalid keyword size*/
-+  ucvector_push_back(&data, 0); /*null termination char*/
-+  ucvector_push_back(&data, compressed ? 1 : 0); /*compression flag*/
-+  ucvector_push_back(&data, 0); /*compression method*/
-+  for(i = 0; langtag[i] != 0; ++i) ucvector_push_back(&data, (unsigned char)langtag[i]);
-+  ucvector_push_back(&data, 0); /*null termination char*/
-+  for(i = 0; transkey[i] != 0; ++i) ucvector_push_back(&data, (unsigned char)transkey[i]);
-+  ucvector_push_back(&data, 0); /*null termination char*/
-+
-+  if(compressed)
-+  {
-+    ucvector compressed_data;
-+    ucvector_init(&compressed_data);
-+    error = zlib_compress(&compressed_data.data, &compressed_data.size,
-+                          (unsigned char*)textstring, textsize, zlibsettings);
-+    if(!error)
-+    {
-+      for(i = 0; i != compressed_data.size; ++i) ucvector_push_back(&data, compressed_data.data[i]);
-+    }
-+    ucvector_cleanup(&compressed_data);
-+  }
-+  else /*not compressed*/
-+  {
-+    for(i = 0; textstring[i] != 0; ++i) ucvector_push_back(&data, (unsigned char)textstring[i]);
-+  }
-+
-+  if(!error) error = addChunk(out, "iTXt", data.data, data.size);
-+  ucvector_cleanup(&data);
-+  return error;
-+}
-+
-+static unsigned addChunk_bKGD(ucvector* out, const LodePNGInfo* info)
-+{
-+  unsigned error = 0;
-+  ucvector bKGD;
-+  ucvector_init(&bKGD);
-+  if(info->color.colortype == LCT_GREY || info->color.colortype == LCT_GREY_ALPHA)
-+  {
-+    ucvector_push_back(&bKGD, (unsigned char)(info->background_r >> 8));
-+    ucvector_push_back(&bKGD, (unsigned char)(info->background_r & 255));
-+  }
-+  else if(info->color.colortype == LCT_RGB || info->color.colortype == LCT_RGBA)
-+  {
-+    ucvector_push_back(&bKGD, (unsigned char)(info->background_r >> 8));
-+    ucvector_push_back(&bKGD, (unsigned char)(info->background_r & 255));
-+    ucvector_push_back(&bKGD, (unsigned char)(info->background_g >> 8));
-+    ucvector_push_back(&bKGD, (unsigned char)(info->background_g & 255));
-+    ucvector_push_back(&bKGD, (unsigned char)(info->background_b >> 8));
-+    ucvector_push_back(&bKGD, (unsigned char)(info->background_b & 255));
-+  }
-+  else if(info->color.colortype == LCT_PALETTE)
-+  {
-+    ucvector_push_back(&bKGD, (unsigned char)(info->background_r & 255)); /*palette index*/
-+  }
-+
-+  error = addChunk(out, "bKGD", bKGD.data, bKGD.size);
-+  ucvector_cleanup(&bKGD);
-+
-+  return error;
-+}
-+
-+static unsigned addChunk_tIME(ucvector* out, const LodePNGTime* time)
-+{
-+  unsigned error = 0;
-+  unsigned char* data = (unsigned char*)lodepng_malloc(7);
-+  if(!data) return 83; /*alloc fail*/
-+  data[0] = (unsigned char)(time->year >> 8);
-+  data[1] = (unsigned char)(time->year & 255);
-+  data[2] = (unsigned char)time->month;
-+  data[3] = (unsigned char)time->day;
-+  data[4] = (unsigned char)time->hour;
-+  data[5] = (unsigned char)time->minute;
-+  data[6] = (unsigned char)time->second;
-+  error = addChunk(out, "tIME", data, 7);
-+  lodepng_free(data);
-+  return error;
-+}
-+
-+static unsigned addChunk_pHYs(ucvector* out, const LodePNGInfo* info)
-+{
-+  unsigned error = 0;
-+  ucvector data;
-+  ucvector_init(&data);
-+
-+  lodepng_add32bitInt(&data, info->phys_x);
-+  lodepng_add32bitInt(&data, info->phys_y);
-+  ucvector_push_back(&data, info->phys_unit);
-+
-+  error = addChunk(out, "pHYs", data.data, data.size);
-+  ucvector_cleanup(&data);
-+
-+  return error;
-+}
-+
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+
-+static void filterScanline(unsigned char* out, const unsigned char* scanline, const unsigned char* prevline,
-+                           size_t length, size_t bytewidth, unsigned char filterType)
-+{
-+  size_t i;
-+  switch(filterType)
-+  {
-+    case 0: /*None*/
-+      for(i = 0; i != length; ++i) out[i] = scanline[i];
-+      break;
-+    case 1: /*Sub*/
-+      for(i = 0; i != bytewidth; ++i) out[i] = scanline[i];
-+      for(i = bytewidth; i < length; ++i) out[i] = scanline[i] - scanline[i - bytewidth];
-+      break;
-+    case 2: /*Up*/
-+      if(prevline)
-+      {
-+        for(i = 0; i != length; ++i) out[i] = scanline[i] - prevline[i];
-+      }
-+      else
-+      {
-+        for(i = 0; i != length; ++i) out[i] = scanline[i];
-+      }
-+      break;
-+    case 3: /*Average*/
-+      if(prevline)
-+      {
-+        for(i = 0; i != bytewidth; ++i) out[i] = scanline[i] - (prevline[i] >> 1);
-+        for(i = bytewidth; i < length; ++i) out[i] = scanline[i] - ((scanline[i - bytewidth] + prevline[i]) >> 1);
-+      }
-+      else
-+      {
-+        for(i = 0; i != bytewidth; ++i) out[i] = scanline[i];
-+        for(i = bytewidth; i < length; ++i) out[i] = scanline[i] - (scanline[i - bytewidth] >> 1);
-+      }
-+      break;
-+    case 4: /*Paeth*/
-+      if(prevline)
-+      {
-+        /*paethPredictor(0, prevline[i], 0) is always prevline[i]*/
-+        for(i = 0; i != bytewidth; ++i) out[i] = (scanline[i] - prevline[i]);
-+        for(i = bytewidth; i < length; ++i)
-+        {
-+          out[i] = (scanline[i] - paethPredictor(scanline[i - bytewidth], prevline[i], prevline[i - bytewidth]));
-+        }
-+      }
-+      else
-+      {
-+        for(i = 0; i != bytewidth; ++i) out[i] = scanline[i];
-+        /*paethPredictor(scanline[i - bytewidth], 0, 0) is always scanline[i - bytewidth]*/
-+        for(i = bytewidth; i < length; ++i) out[i] = (scanline[i] - scanline[i - bytewidth]);
-+      }
-+      break;
-+    default: return; /*unexisting filter type given*/
-+  }
-+}
-+
-+/* log2 approximation. A slight bit faster than std::log. */
-+static float flog2(float f)
-+{
-+  float result = 0;
-+  while(f > 32) { result += 4; f /= 16; }
-+  while(f > 2) { ++result; f /= 2; }
-+  return result + 1.442695f * (f * f * f / 3 - 3 * f * f / 2 + 3 * f - 1.83333f);
-+}
-+
-+static unsigned filter(unsigned char* out, const unsigned char* in, unsigned w, unsigned h,
-+                       const LodePNGColorMode* info, const LodePNGEncoderSettings* settings)
-+{
-+  /*
-+  For PNG filter method 0
-+  out must be a buffer with as size: h + (w * h * bpp + 7) / 8, because there are
-+  the scanlines with 1 extra byte per scanline
-+  */
-+
-+  unsigned bpp = lodepng_get_bpp(info);
-+  /*the width of a scanline in bytes, not including the filter type*/
-+  size_t linebytes = (w * bpp + 7) / 8;
-+  /*bytewidth is used for filtering, is 1 when bpp < 8, number of bytes per pixel otherwise*/
-+  size_t bytewidth = (bpp + 7) / 8;
-+  const unsigned char* prevline = 0;
-+  unsigned x, y;
-+  unsigned error = 0;
-+  LodePNGFilterStrategy strategy = settings->filter_strategy;
-+
-+  /*
-+  There is a heuristic called the minimum sum of absolute differences heuristic, suggested by the PNG standard:
-+   *  If the image type is Palette, or the bit depth is smaller than 8, then do not filter the image (i.e.
-+      use fixed filtering, with the filter None).
-+   * (The other case) If the image type is Grayscale or RGB (with or without Alpha), and the bit depth is
-+     not smaller than 8, then use adaptive filtering heuristic as follows: independently for each row, apply
-+     all five filters and select the filter that produces the smallest sum of absolute values per row.
-+  This heuristic is used if filter strategy is LFS_MINSUM and filter_palette_zero is true.
-+
-+  If filter_palette_zero is true and filter_strategy is not LFS_MINSUM, the above heuristic is followed,
-+  but for "the other case", whatever strategy filter_strategy is set to instead of the minimum sum
-+  heuristic is used.
-+  */
-+  if(settings->filter_palette_zero &&
-+     (info->colortype == LCT_PALETTE || info->bitdepth < 8)) strategy = LFS_ZERO;
-+
-+  if(bpp == 0) return 31; /*error: invalid color type*/
-+
-+  if(strategy == LFS_ZERO)
-+  {
-+    for(y = 0; y != h; ++y)
-+    {
-+      size_t outindex = (1 + linebytes) * y; /*the extra filterbyte added to each row*/
-+      size_t inindex = linebytes * y;
-+      out[outindex] = 0; /*filter type byte*/
-+      filterScanline(&out[outindex + 1], &in[inindex], prevline, linebytes, bytewidth, 0);
-+      prevline = &in[inindex];
-+    }
-+  }
-+  else if(strategy == LFS_MINSUM)
-+  {
-+    /*adaptive filtering*/
-+    size_t sum[5];
-+    unsigned char* attempt[5]; /*five filtering attempts, one for each filter type*/
-+    size_t smallest = 0;
-+    unsigned char type, bestType = 0;
-+
-+    for(type = 0; type != 5; ++type)
-+    {
-+      attempt[type] = (unsigned char*)lodepng_malloc(linebytes);
-+      if(!attempt[type]) return 83; /*alloc fail*/
-+    }
-+
-+    if(!error)
-+    {
-+      for(y = 0; y != h; ++y)
-+      {
-+        /*try the 5 filter types*/
-+        for(type = 0; type != 5; ++type)
-+        {
-+          filterScanline(attempt[type], &in[y * linebytes], prevline, linebytes, bytewidth, type);
-+
-+          /*calculate the sum of the result*/
-+          sum[type] = 0;
-+          if(type == 0)
-+          {
-+            for(x = 0; x != linebytes; ++x) sum[type] += (unsigned char)(attempt[type][x]);
-+          }
-+          else
-+          {
-+            for(x = 0; x != linebytes; ++x)
-+            {
-+              /*For differences, each byte should be treated as signed, values above 127 are negative
-+              (converted to signed char). Filtertype 0 isn't a difference though, so use unsigned there.
-+              This means filtertype 0 is almost never chosen, but that is justified.*/
-+              unsigned char s = attempt[type][x];
-+              sum[type] += s < 128 ? s : (255U - s);
-+            }
-+          }
-+
-+          /*check if this is smallest sum (or if type == 0 it's the first case so always store the values)*/
-+          if(type == 0 || sum[type] < smallest)
-+          {
-+            bestType = type;
-+            smallest = sum[type];
-+          }
-+        }
-+
-+        prevline = &in[y * linebytes];
-+
-+        /*now fill the out values*/
-+        out[y * (linebytes + 1)] = bestType; /*the first byte of a scanline will be the filter type*/
-+        for(x = 0; x != linebytes; ++x) out[y * (linebytes + 1) + 1 + x] = attempt[bestType][x];
-+      }
-+    }
-+
-+    for(type = 0; type != 5; ++type) lodepng_free(attempt[type]);
-+  }
-+  else if(strategy == LFS_ENTROPY)
-+  {
-+    float sum[5];
-+    unsigned char* attempt[5]; /*five filtering attempts, one for each filter type*/
-+    float smallest = 0;
-+    unsigned type, bestType = 0;
-+    unsigned count[256];
-+
-+    for(type = 0; type != 5; ++type)
-+    {
-+      attempt[type] = (unsigned char*)lodepng_malloc(linebytes);
-+      if(!attempt[type]) return 83; /*alloc fail*/
-+    }
-+
-+    for(y = 0; y != h; ++y)
-+    {
-+      /*try the 5 filter types*/
-+      for(type = 0; type != 5; ++type)
-+      {
-+        filterScanline(attempt[type], &in[y * linebytes], prevline, linebytes, bytewidth, type);
-+        for(x = 0; x != 256; ++x) count[x] = 0;
-+        for(x = 0; x != linebytes; ++x) ++count[attempt[type][x]];
-+        ++count[type]; /*the filter type itself is part of the scanline*/
-+        sum[type] = 0;
-+        for(x = 0; x != 256; ++x)
-+        {
-+          float p = count[x] / (float)(linebytes + 1);
-+          sum[type] += count[x] == 0 ? 0 : flog2(1 / p) * p;
-+        }
-+        /*check if this is smallest sum (or if type == 0 it's the first case so always store the values)*/
-+        if(type == 0 || sum[type] < smallest)
-+        {
-+          bestType = type;
-+          smallest = sum[type];
-+        }
-+      }
-+
-+      prevline = &in[y * linebytes];
-+
-+      /*now fill the out values*/
-+      out[y * (linebytes + 1)] = bestType; /*the first byte of a scanline will be the filter type*/
-+      for(x = 0; x != linebytes; ++x) out[y * (linebytes + 1) + 1 + x] = attempt[bestType][x];
-+    }
-+
-+    for(type = 0; type != 5; ++type) lodepng_free(attempt[type]);
-+  }
-+  else if(strategy == LFS_PREDEFINED)
-+  {
-+    for(y = 0; y != h; ++y)
-+    {
-+      size_t outindex = (1 + linebytes) * y; /*the extra filterbyte added to each row*/
-+      size_t inindex = linebytes * y;
-+      unsigned char type = settings->predefined_filters[y];
-+      out[outindex] = type; /*filter type byte*/
-+      filterScanline(&out[outindex + 1], &in[inindex], prevline, linebytes, bytewidth, type);
-+      prevline = &in[inindex];
-+    }
-+  }
-+  else if(strategy == LFS_BRUTE_FORCE)
-+  {
-+    /*brute force filter chooser.
-+    deflate the scanline after every filter attempt to see which one deflates best.
-+    This is very slow and gives only slightly smaller, sometimes even larger, result*/
-+    size_t size[5];
-+    unsigned char* attempt[5]; /*five filtering attempts, one for each filter type*/
-+    size_t smallest = 0;
-+    unsigned type = 0, bestType = 0;
-+    unsigned char* dummy;
-+    LodePNGCompressSettings zlibsettings = settings->zlibsettings;
-+    /*use fixed tree on the attempts so that the tree is not adapted to the filtertype on purpose,
-+    to simulate the true case where the tree is the same for the whole image. Sometimes it gives
-+    better result with dynamic tree anyway. Using the fixed tree sometimes gives worse, but in rare
-+    cases better compression. It does make this a bit less slow, so it's worth doing this.*/
-+    zlibsettings.btype = 1;
-+    /*a custom encoder likely doesn't read the btype setting and is optimized for complete PNG
-+    images only, so disable it*/
-+    zlibsettings.custom_zlib = 0;
-+    zlibsettings.custom_deflate = 0;
-+    for(type = 0; type != 5; ++type)
-+    {
-+      attempt[type] = (unsigned char*)lodepng_malloc(linebytes);
-+      if(!attempt[type]) return 83; /*alloc fail*/
-+    }
-+    for(y = 0; y != h; ++y) /*try the 5 filter types*/
-+    {
-+      for(type = 0; type != 5; ++type)
-+      {
-+        unsigned testsize = linebytes;
-+        /*if(testsize > 8) testsize /= 8;*/ /*it already works good enough by testing a part of the row*/
-+
-+        filterScanline(attempt[type], &in[y * linebytes], prevline, linebytes, bytewidth, type);
-+        size[type] = 0;
-+        dummy = 0;
-+        zlib_compress(&dummy, &size[type], attempt[type], testsize, &zlibsettings);
-+        lodepng_free(dummy);
-+        /*check if this is smallest size (or if type == 0 it's the first case so always store the values)*/
-+        if(type == 0 || size[type] < smallest)
-+        {
-+          bestType = type;
-+          smallest = size[type];
-+        }
-+      }
-+      prevline = &in[y * linebytes];
-+      out[y * (linebytes + 1)] = bestType; /*the first byte of a scanline will be the filter type*/
-+      for(x = 0; x != linebytes; ++x) out[y * (linebytes + 1) + 1 + x] = attempt[bestType][x];
-+    }
-+    for(type = 0; type != 5; ++type) lodepng_free(attempt[type]);
-+  }
-+  else return 88; /* unknown filter strategy */
-+
-+  return error;
-+}
-+
-+static void addPaddingBits(unsigned char* out, const unsigned char* in,
-+                           size_t olinebits, size_t ilinebits, unsigned h)
-+{
-+  /*The opposite of the removePaddingBits function
-+  olinebits must be >= ilinebits*/
-+  unsigned y;
-+  size_t diff = olinebits - ilinebits;
-+  size_t obp = 0, ibp = 0; /*bit pointers*/
-+  for(y = 0; y != h; ++y)
-+  {
-+    size_t x;
-+    for(x = 0; x < ilinebits; ++x)
-+    {
-+      unsigned char bit = readBitFromReversedStream(&ibp, in);
-+      setBitOfReversedStream(&obp, out, bit);
-+    }
-+    /*obp += diff; --> no, fill in some value in the padding bits too, to avoid
-+    "Use of uninitialised value of size ###" warning from valgrind*/
-+    for(x = 0; x != diff; ++x) setBitOfReversedStream(&obp, out, 0);
-+  }
-+}
-+
-+/*
-+in: non-interlaced image with size w*h
-+out: the same pixels, but re-ordered according to PNG's Adam7 interlacing, with
-+ no padding bits between scanlines, but between reduced images so that each
-+ reduced image starts at a byte.
-+bpp: bits per pixel
-+there are no padding bits, not between scanlines, not between reduced images
-+in has the following size in bits: w * h * bpp.
-+out is possibly bigger due to padding bits between reduced images
-+NOTE: comments about padding bits are only relevant if bpp < 8
-+*/
-+static void Adam7_interlace(unsigned char* out, const unsigned char* in, unsigned w, unsigned h, unsigned bpp)
-+{
-+  unsigned passw[7], passh[7];
-+  size_t filter_passstart[8], padded_passstart[8], passstart[8];
-+  unsigned i;
-+
-+  Adam7_getpassvalues(passw, passh, filter_passstart, padded_passstart, passstart, w, h, bpp);
-+
-+  if(bpp >= 8)
-+  {
-+    for(i = 0; i != 7; ++i)
-+    {
-+      unsigned x, y, b;
-+      size_t bytewidth = bpp / 8;
-+      for(y = 0; y < passh[i]; ++y)
-+      for(x = 0; x < passw[i]; ++x)
-+      {
-+        size_t pixelinstart = ((ADAM7_IY[i] + y * ADAM7_DY[i]) * w + ADAM7_IX[i] + x * ADAM7_DX[i]) * bytewidth;
-+        size_t pixeloutstart = passstart[i] + (y * passw[i] + x) * bytewidth;
-+        for(b = 0; b < bytewidth; ++b)
-+        {
-+          out[pixeloutstart + b] = in[pixelinstart + b];
-+        }
-+      }
-+    }
-+  }
-+  else /*bpp < 8: Adam7 with pixels < 8 bit is a bit trickier: with bit pointers*/
-+  {
-+    for(i = 0; i != 7; ++i)
-+    {
-+      unsigned x, y, b;
-+      unsigned ilinebits = bpp * passw[i];
-+      unsigned olinebits = bpp * w;
-+      size_t obp, ibp; /*bit pointers (for out and in buffer)*/
-+      for(y = 0; y < passh[i]; ++y)
-+      for(x = 0; x < passw[i]; ++x)
-+      {
-+        ibp = (ADAM7_IY[i] + y * ADAM7_DY[i]) * olinebits + (ADAM7_IX[i] + x * ADAM7_DX[i]) * bpp;
-+        obp = (8 * passstart[i]) + (y * ilinebits + x * bpp);
-+        for(b = 0; b < bpp; ++b)
-+        {
-+          unsigned char bit = readBitFromReversedStream(&ibp, in);
-+          setBitOfReversedStream(&obp, out, bit);
-+        }
-+      }
-+    }
-+  }
-+}
-+
-+/*out must be buffer big enough to contain uncompressed IDAT chunk data, and in must contain the full image.
-+return value is error**/
-+static unsigned preProcessScanlines(unsigned char** out, size_t* outsize, const unsigned char* in,
-+                                    unsigned w, unsigned h,
-+                                    const LodePNGInfo* info_png, const LodePNGEncoderSettings* settings)
-+{
-+  /*
-+  This function converts the pure 2D image with the PNG's colortype, into filtered-padded-interlaced data. Steps:
-+  *) if no Adam7: 1) add padding bits (= posible extra bits per scanline if bpp < 8) 2) filter
-+  *) if adam7: 1) Adam7_interlace 2) 7x add padding bits 3) 7x filter
-+  */
-+  unsigned bpp = lodepng_get_bpp(&info_png->color);
-+  unsigned error = 0;
-+
-+  if(info_png->interlace_method == 0)
-+  {
-+    *outsize = h + (h * ((w * bpp + 7) / 8)); /*image size plus an extra byte per scanline + possible padding bits*/
-+    *out = (unsigned char*)lodepng_malloc(*outsize);
-+    if(!(*out) && (*outsize)) error = 83; /*alloc fail*/
-+
-+    if(!error)
-+    {
-+      /*non multiple of 8 bits per scanline, padding bits needed per scanline*/
-+      if(bpp < 8 && w * bpp != ((w * bpp + 7) / 8) * 8)
-+      {
-+        unsigned char* padded = (unsigned char*)lodepng_malloc(h * ((w * bpp + 7) / 8));
-+        if(!padded) error = 83; /*alloc fail*/
-+        if(!error)
-+        {
-+          addPaddingBits(padded, in, ((w * bpp + 7) / 8) * 8, w * bpp, h);
-+          error = filter(*out, padded, w, h, &info_png->color, settings);
-+        }
-+        lodepng_free(padded);
-+      }
-+      else
-+      {
-+        /*we can immediately filter into the out buffer, no other steps needed*/
-+        error = filter(*out, in, w, h, &info_png->color, settings);
-+      }
-+    }
-+  }
-+  else /*interlace_method is 1 (Adam7)*/
-+  {
-+    unsigned passw[7], passh[7];
-+    size_t filter_passstart[8], padded_passstart[8], passstart[8];
-+    unsigned char* adam7;
-+
-+    Adam7_getpassvalues(passw, passh, filter_passstart, padded_passstart, passstart, w, h, bpp);
-+
-+    *outsize = filter_passstart[7]; /*image size plus an extra byte per scanline + possible padding bits*/
-+    *out = (unsigned char*)lodepng_malloc(*outsize);
-+    if(!(*out)) error = 83; /*alloc fail*/
-+
-+    adam7 = (unsigned char*)lodepng_malloc(passstart[7]);
-+    if(!adam7 && passstart[7]) error = 83; /*alloc fail*/
-+
-+    if(!error)
-+    {
-+      unsigned i;
-+
-+      Adam7_interlace(adam7, in, w, h, bpp);
-+      for(i = 0; i != 7; ++i)
-+      {
-+        if(bpp < 8)
-+        {
-+          unsigned char* padded = (unsigned char*)lodepng_malloc(padded_passstart[i + 1] - padded_passstart[i]);
-+          if(!padded) ERROR_BREAK(83); /*alloc fail*/
-+          addPaddingBits(padded, &adam7[passstart[i]],
-+                         ((passw[i] * bpp + 7) / 8) * 8, passw[i] * bpp, passh[i]);
-+          error = filter(&(*out)[filter_passstart[i]], padded,
-+                         passw[i], passh[i], &info_png->color, settings);
-+          lodepng_free(padded);
-+        }
-+        else
-+        {
-+          error = filter(&(*out)[filter_passstart[i]], &adam7[padded_passstart[i]],
-+                         passw[i], passh[i], &info_png->color, settings);
-+        }
-+
-+        if(error) break;
-+      }
-+    }
-+
-+    lodepng_free(adam7);
-+  }
-+
-+  return error;
-+}
-+
-+/*
-+palette must have 4 * palettesize bytes allocated, and given in format RGBARGBARGBARGBA...
-+returns 0 if the palette is opaque,
-+returns 1 if the palette has a single color with alpha 0 ==> color key
-+returns 2 if the palette is semi-translucent.
-+*/
-+static unsigned getPaletteTranslucency(const unsigned char* palette, size_t palettesize)
-+{
-+  size_t i;
-+  unsigned key = 0;
-+  unsigned r = 0, g = 0, b = 0; /*the value of the color with alpha 0, so long as color keying is possible*/
-+  for(i = 0; i != palettesize; ++i)
-+  {
-+    if(!key && palette[4 * i + 3] == 0)
-+    {
-+      r = palette[4 * i + 0]; g = palette[4 * i + 1]; b = palette[4 * i + 2];
-+      key = 1;
-+      i = (size_t)(-1); /*restart from beginning, to detect earlier opaque colors with key's value*/
-+    }
-+    else if(palette[4 * i + 3] != 255) return 2;
-+    /*when key, no opaque RGB may have key's RGB*/
-+    else if(key && r == palette[i * 4 + 0] && g == palette[i * 4 + 1] && b == palette[i * 4 + 2]) return 2;
-+  }
-+  return key;
-+}
-+
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+static unsigned addUnknownChunks(ucvector* out, unsigned char* data, size_t datasize)
-+{
-+  unsigned char* inchunk = data;
-+  while((size_t)(inchunk - data) < datasize)
-+  {
-+    CERROR_TRY_RETURN(lodepng_chunk_append(&out->data, &out->size, inchunk));
-+    out->allocsize = out->size; /*fix the allocsize again*/
-+    inchunk = lodepng_chunk_next(inchunk);
-+  }
-+  return 0;
-+}
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+
-+unsigned lodepng_encode(unsigned char** out, size_t* outsize,
-+                        const unsigned char* image, unsigned w, unsigned h,
-+                        LodePNGState* state)
-+{
-+  LodePNGInfo info;
-+  ucvector outv;
-+  unsigned char* data = 0; /*uncompressed version of the IDAT chunk data*/
-+  size_t datasize = 0;
-+
-+  /*provide some proper output values if error will happen*/
-+  *out = 0;
-+  *outsize = 0;
-+  state->error = 0;
-+
-+  lodepng_info_init(&info);
-+  lodepng_info_copy(&info, &state->info_png);
-+
-+  if((info.color.colortype == LCT_PALETTE || state->encoder.force_palette)
-+      && (info.color.palettesize == 0 || info.color.palettesize > 256))
-+  {
-+    state->error = 68; /*invalid palette size, it is only allowed to be 1-256*/
-+    return state->error;
-+  }
-+
-+  if(state->encoder.auto_convert)
-+  {
-+    state->error = lodepng_auto_choose_color(&info.color, image, w, h, &state->info_raw);
-+  }
-+  if(state->error) return state->error;
-+
-+  if(state->encoder.zlibsettings.btype > 2)
-+  {
-+    CERROR_RETURN_ERROR(state->error, 61); /*error: unexisting btype*/
-+  }
-+  if(state->info_png.interlace_method > 1)
-+  {
-+    CERROR_RETURN_ERROR(state->error, 71); /*error: unexisting interlace mode*/
-+  }
-+
-+  state->error = checkColorValidity(info.color.colortype, info.color.bitdepth);
-+  if(state->error) return state->error; /*error: unexisting color type given*/
-+  state->error = checkColorValidity(state->info_raw.colortype, state->info_raw.bitdepth);
-+  if(state->error) return state->error; /*error: unexisting color type given*/
-+
-+  if(!lodepng_color_mode_equal(&state->info_raw, &info.color))
-+  {
-+    unsigned char* converted;
-+    size_t size = (w * h * lodepng_get_bpp(&info.color) + 7) / 8;
-+
-+    converted = (unsigned char*)lodepng_malloc(size);
-+    if(!converted && size) state->error = 83; /*alloc fail*/
-+    if(!state->error)
-+    {
-+      state->error = lodepng_convert(converted, image, &info.color, &state->info_raw, w, h);
-+    }
-+    if(!state->error) preProcessScanlines(&data, &datasize, converted, w, h, &info, &state->encoder);
-+    lodepng_free(converted);
-+  }
-+  else preProcessScanlines(&data, &datasize, image, w, h, &info, &state->encoder);
-+
-+  ucvector_init(&outv);
-+  while(!state->error) /*while only executed once, to break on error*/
-+  {
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+    size_t i;
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+    /*write signature and chunks*/
-+    writeSignature(&outv);
-+    /*IHDR*/
-+    addChunk_IHDR(&outv, w, h, info.color.colortype, info.color.bitdepth, info.interlace_method);
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+    /*unknown chunks between IHDR and PLTE*/
-+    if(info.unknown_chunks_data[0])
-+    {
-+      state->error = addUnknownChunks(&outv, info.unknown_chunks_data[0], info.unknown_chunks_size[0]);
-+      if(state->error) break;
-+    }
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+    /*PLTE*/
-+    if(info.color.colortype == LCT_PALETTE)
-+    {
-+      addChunk_PLTE(&outv, &info.color);
-+    }
-+    if(state->encoder.force_palette && (info.color.colortype == LCT_RGB || info.color.colortype == LCT_RGBA))
-+    {
-+      addChunk_PLTE(&outv, &info.color);
-+    }
-+    /*tRNS*/
-+    if(info.color.colortype == LCT_PALETTE && getPaletteTranslucency(info.color.palette, info.color.palettesize) != 0)
-+    {
-+      addChunk_tRNS(&outv, &info.color);
-+    }
-+    if((info.color.colortype == LCT_GREY || info.color.colortype == LCT_RGB) && info.color.key_defined)
-+    {
-+      addChunk_tRNS(&outv, &info.color);
-+    }
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+    /*bKGD (must come between PLTE and the IDAt chunks*/
-+    if(info.background_defined) addChunk_bKGD(&outv, &info);
-+    /*pHYs (must come before the IDAT chunks)*/
-+    if(info.phys_defined) addChunk_pHYs(&outv, &info);
-+
-+    /*unknown chunks between PLTE and IDAT*/
-+    if(info.unknown_chunks_data[1])
-+    {
-+      state->error = addUnknownChunks(&outv, info.unknown_chunks_data[1], info.unknown_chunks_size[1]);
-+      if(state->error) break;
-+    }
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+    /*IDAT (multiple IDAT chunks must be consecutive)*/
-+    state->error = addChunk_IDAT(&outv, data, datasize, &state->encoder.zlibsettings);
-+    if(state->error) break;
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+    /*tIME*/
-+    if(info.time_defined) addChunk_tIME(&outv, &info.time);
-+    /*tEXt and/or zTXt*/
-+    for(i = 0; i != info.text_num; ++i)
-+    {
-+      if(strlen(info.text_keys[i]) > 79)
-+      {
-+        state->error = 66; /*text chunk too large*/
-+        break;
-+      }
-+      if(strlen(info.text_keys[i]) < 1)
-+      {
-+        state->error = 67; /*text chunk too small*/
-+        break;
-+      }
-+      if(state->encoder.text_compression)
-+      {
-+        addChunk_zTXt(&outv, info.text_keys[i], info.text_strings[i], &state->encoder.zlibsettings);
-+      }
-+      else
-+      {
-+        addChunk_tEXt(&outv, info.text_keys[i], info.text_strings[i]);
-+      }
-+    }
-+    /*LodePNG version id in text chunk*/
-+    if(state->encoder.add_id)
-+    {
-+      unsigned alread_added_id_text = 0;
-+      for(i = 0; i != info.text_num; ++i)
-+      {
-+        if(!strcmp(info.text_keys[i], "LodePNG"))
-+        {
-+          alread_added_id_text = 1;
-+          break;
-+        }
-+      }
-+      if(alread_added_id_text == 0)
-+      {
-+        addChunk_tEXt(&outv, "LodePNG", LODEPNG_VERSION_STRING); /*it's shorter as tEXt than as zTXt chunk*/
-+      }
-+    }
-+    /*iTXt*/
-+    for(i = 0; i != info.itext_num; ++i)
-+    {
-+      if(strlen(info.itext_keys[i]) > 79)
-+      {
-+        state->error = 66; /*text chunk too large*/
-+        break;
-+      }
-+      if(strlen(info.itext_keys[i]) < 1)
-+      {
-+        state->error = 67; /*text chunk too small*/
-+        break;
-+      }
-+      addChunk_iTXt(&outv, state->encoder.text_compression,
-+                    info.itext_keys[i], info.itext_langtags[i], info.itext_transkeys[i], info.itext_strings[i],
-+                    &state->encoder.zlibsettings);
-+    }
-+
-+    /*unknown chunks between IDAT and IEND*/
-+    if(info.unknown_chunks_data[2])
-+    {
-+      state->error = addUnknownChunks(&outv, info.unknown_chunks_data[2], info.unknown_chunks_size[2]);
-+      if(state->error) break;
-+    }
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+    addChunk_IEND(&outv);
-+
-+    break; /*this isn't really a while loop; no error happened so break out now!*/
-+  }
-+
-+  lodepng_info_cleanup(&info);
-+  lodepng_free(data);
-+  /*instead of cleaning the vector up, give it to the output*/
-+  *out = outv.data;
-+  *outsize = outv.size;
-+
-+  return state->error;
-+}
-+
-+unsigned lodepng_encode_memory(unsigned char** out, size_t* outsize, const unsigned char* image,
-+                               unsigned w, unsigned h, LodePNGColorType colortype, unsigned bitdepth)
-+{
-+  unsigned error;
-+  LodePNGState state;
-+  lodepng_state_init(&state);
-+  state.info_raw.colortype = colortype;
-+  state.info_raw.bitdepth = bitdepth;
-+  state.info_png.color.colortype = colortype;
-+  state.info_png.color.bitdepth = bitdepth;
-+  lodepng_encode(out, outsize, image, w, h, &state);
-+  error = state.error;
-+  lodepng_state_cleanup(&state);
-+  return error;
-+}
-+
-+unsigned lodepng_encode32(unsigned char** out, size_t* outsize, const unsigned char* image, unsigned w, unsigned h)
-+{
-+  return lodepng_encode_memory(out, outsize, image, w, h, LCT_RGBA, 8);
-+}
-+
-+unsigned lodepng_encode24(unsigned char** out, size_t* outsize, const unsigned char* image, unsigned w, unsigned h)
-+{
-+  return lodepng_encode_memory(out, outsize, image, w, h, LCT_RGB, 8);
-+}
-+
-+#ifdef LODEPNG_COMPILE_DISK
-+unsigned lodepng_encode_file(const char* filename, const unsigned char* image, unsigned w, unsigned h,
-+                             LodePNGColorType colortype, unsigned bitdepth)
-+{
-+  unsigned char* buffer;
-+  size_t buffersize;
-+  unsigned error = lodepng_encode_memory(&buffer, &buffersize, image, w, h, colortype, bitdepth);
-+  if(!error) error = lodepng_save_file(buffer, buffersize, filename);
-+  lodepng_free(buffer);
-+  return error;
-+}
-+
-+unsigned lodepng_encode32_file(const char* filename, const unsigned char* image, unsigned w, unsigned h)
-+{
-+  return lodepng_encode_file(filename, image, w, h, LCT_RGBA, 8);
-+}
-+
-+unsigned lodepng_encode24_file(const char* filename, const unsigned char* image, unsigned w, unsigned h)
-+{
-+  return lodepng_encode_file(filename, image, w, h, LCT_RGB, 8);
-+}
-+#endif /*LODEPNG_COMPILE_DISK*/
-+
-+void lodepng_encoder_settings_init(LodePNGEncoderSettings* settings)
-+{
-+  lodepng_compress_settings_init(&settings->zlibsettings);
-+  settings->filter_palette_zero = 1;
-+  settings->filter_strategy = LFS_MINSUM;
-+  settings->auto_convert = 1;
-+  settings->force_palette = 0;
-+  settings->predefined_filters = 0;
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+  settings->add_id = 0;
-+  settings->text_compression = 1;
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+}
-+
-+#endif /*LODEPNG_COMPILE_ENCODER*/
-+#endif /*LODEPNG_COMPILE_PNG*/
-+
-+#ifdef LODEPNG_COMPILE_ERROR_TEXT
-+/*
-+This returns the description of a numerical error code in English. This is also
-+the documentation of all the error codes.
-+*/
-+const char* lodepng_error_text(unsigned code)
-+{
-+  switch(code)
-+  {
-+    case 0: return "no error, everything went ok";
-+    case 1: return "nothing done yet"; /*the Encoder/Decoder has done nothing yet, error checking makes no sense yet*/
-+    case 10: return "end of input memory reached without huffman end code"; /*while huffman decoding*/
-+    case 11: return "error in code tree made it jump outside of huffman tree"; /*while huffman decoding*/
-+    case 13: return "problem while processing dynamic deflate block";
-+    case 14: return "problem while processing dynamic deflate block";
-+    case 15: return "problem while processing dynamic deflate block";
-+    case 16: return "unexisting code while processing dynamic deflate block";
-+    case 17: return "end of out buffer memory reached while inflating";
-+    case 18: return "invalid distance code while inflating";
-+    case 19: return "end of out buffer memory reached while inflating";
-+    case 20: return "invalid deflate block BTYPE encountered while decoding";
-+    case 21: return "NLEN is not ones complement of LEN in a deflate block";
-+     /*end of out buffer memory reached while inflating:
-+     This can happen if the inflated deflate data is longer than the amount of bytes required to fill up
-+     all the pixels of the image, given the color depth and image dimensions. Something that doesn't
-+     happen in a normal, well encoded, PNG image.*/
-+    case 22: return "end of out buffer memory reached while inflating";
-+    case 23: return "end of in buffer memory reached while inflating";
-+    case 24: return "invalid FCHECK in zlib header";
-+    case 25: return "invalid compression method in zlib header";
-+    case 26: return "FDICT encountered in zlib header while it's not used for PNG";
-+    case 27: return "PNG file is smaller than a PNG header";
-+    /*Checks the magic file header, the first 8 bytes of the PNG file*/
-+    case 28: return "incorrect PNG signature, it's no PNG or corrupted";
-+    case 29: return "first chunk is not the header chunk";
-+    case 30: return "chunk length too large, chunk broken off at end of file";
-+    case 31: return "illegal PNG color type or bpp";
-+    case 32: return "illegal PNG compression method";
-+    case 33: return "illegal PNG filter method";
-+    case 34: return "illegal PNG interlace method";
-+    case 35: return "chunk length of a chunk is too large or the chunk too small";
-+    case 36: return "illegal PNG filter type encountered";
-+    case 37: return "illegal bit depth for this color type given";
-+    case 38: return "the palette is too big"; /*more than 256 colors*/
-+    case 39: return "more palette alpha values given in tRNS chunk than there are colors in the palette";
-+    case 40: return "tRNS chunk has wrong size for greyscale image";
-+    case 41: return "tRNS chunk has wrong size for RGB image";
-+    case 42: return "tRNS chunk appeared while it was not allowed for this color type";
-+    case 43: return "bKGD chunk has wrong size for palette image";
-+    case 44: return "bKGD chunk has wrong size for greyscale image";
-+    case 45: return "bKGD chunk has wrong size for RGB image";
-+    case 48: return "empty input buffer given to decoder. Maybe caused by non-existing file?";
-+    case 49: return "jumped past memory while generating dynamic huffman tree";
-+    case 50: return "jumped past memory while generating dynamic huffman tree";
-+    case 51: return "jumped past memory while inflating huffman block";
-+    case 52: return "jumped past memory while inflating";
-+    case 53: return "size of zlib data too small";
-+    case 54: return "repeat symbol in tree while there was no value symbol yet";
-+    /*jumped past tree while generating huffman tree, this could be when the
-+    tree will have more leaves than symbols after generating it out of the
-+    given lenghts. They call this an oversubscribed dynamic bit lengths tree in zlib.*/
-+    case 55: return "jumped past tree while generating huffman tree";
-+    case 56: return "given output image colortype or bitdepth not supported for color conversion";
-+    case 57: return "invalid CRC encountered (checking CRC can be disabled)";
-+    case 58: return "invalid ADLER32 encountered (checking ADLER32 can be disabled)";
-+    case 59: return "requested color conversion not supported";
-+    case 60: return "invalid window size given in the settings of the encoder (must be 0-32768)";
-+    case 61: return "invalid BTYPE given in the settings of the encoder (only 0, 1 and 2 are allowed)";
-+    /*LodePNG leaves the choice of RGB to greyscale conversion formula to the user.*/
-+    case 62: return "conversion from color to greyscale not supported";
-+    case 63: return "length of a chunk too long, max allowed for PNG is 2147483647 bytes per chunk"; /*(2^31-1)*/
-+    /*this would result in the inability of a deflated block to ever contain an end code. It must be at least 1.*/
-+    case 64: return "the length of the END symbol 256 in the Huffman tree is 0";
-+    case 66: return "the length of a text chunk keyword given to the encoder is longer than the maximum of 79 bytes";
-+    case 67: return "the length of a text chunk keyword given to the encoder is smaller than the minimum of 1 byte";
-+    case 68: return "tried to encode a PLTE chunk with a palette that has less than 1 or more than 256 colors";
-+    case 69: return "unknown chunk type with 'critical' flag encountered by the decoder";
-+    case 71: return "unexisting interlace mode given to encoder (must be 0 or 1)";
-+    case 72: return "while decoding, unexisting compression method encountering in zTXt or iTXt chunk (it must be 0)";
-+    case 73: return "invalid tIME chunk size";
-+    case 74: return "invalid pHYs chunk size";
-+    /*length could be wrong, or data chopped off*/
-+    case 75: return "no null termination char found while decoding text chunk";
-+    case 76: return "iTXt chunk too short to contain required bytes";
-+    case 77: return "integer overflow in buffer size";
-+    case 78: return "failed to open file for reading"; /*file doesn't exist or couldn't be opened for reading*/
-+    case 79: return "failed to open file for writing";
-+    case 80: return "tried creating a tree of 0 symbols";
-+    case 81: return "lazy matching at pos 0 is impossible";
-+    case 82: return "color conversion to palette requested while a color isn't in palette";
-+    case 83: return "memory allocation failed";
-+    case 84: return "given image too small to contain all pixels to be encoded";
-+    case 86: return "impossible offset in lz77 encoding (internal bug)";
-+    case 87: return "must provide custom zlib function pointer if LODEPNG_COMPILE_ZLIB is not defined";
-+    case 88: return "invalid filter strategy given for LodePNGEncoderSettings.filter_strategy";
-+    case 89: return "text chunk keyword too short or long: must have size 1-79";
-+    /*the windowsize in the LodePNGCompressSettings. Requiring POT(==> & instead of %) makes encoding 12% faster.*/
-+    case 90: return "windowsize must be a power of two";
-+    case 91: return "invalid decompressed idat size";
-+    case 92: return "too many pixels, not supported";
-+    case 93: return "zero width or height is invalid";
-+    case 94: return "header chunk must have a size of 13 bytes";
-+  }
-+  return "unknown error code";
-+}
-+#endif /*LODEPNG_COMPILE_ERROR_TEXT*/
-+
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* // C++ Wrapper                                                          // */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+/* ////////////////////////////////////////////////////////////////////////// */
-+
-+#ifdef LODEPNG_COMPILE_CPP
-+namespace lodepng
-+{
-+
-+#ifdef LODEPNG_COMPILE_DISK
-+unsigned load_file(std::vector<unsigned char>& buffer, const std::string& filename)
-+{
-+  long size = lodepng_filesize(filename.c_str());
-+  if(size < 0) return 78;
-+  buffer.resize((size_t)size);
-+  return size == 0 ? 0 : lodepng_buffer_file(&buffer[0], (size_t)size, filename.c_str());
-+}
-+
-+/*write given buffer to the file, overwriting the file, it doesn't append to it.*/
-+unsigned save_file(const std::vector<unsigned char>& buffer, const std::string& filename)
-+{
-+  return lodepng_save_file(buffer.empty() ? 0 : &buffer[0], buffer.size(), filename.c_str());
-+}
-+#endif /* LODEPNG_COMPILE_DISK */
-+
-+#ifdef LODEPNG_COMPILE_ZLIB
-+#ifdef LODEPNG_COMPILE_DECODER
-+unsigned decompress(std::vector<unsigned char>& out, const unsigned char* in, size_t insize,
-+                    const LodePNGDecompressSettings& settings)
-+{
-+  unsigned char* buffer = 0;
-+  size_t buffersize = 0;
-+  unsigned error = zlib_decompress(&buffer, &buffersize, in, insize, &settings);
-+  if(buffer)
-+  {
-+    out.insert(out.end(), &buffer[0], &buffer[buffersize]);
-+    lodepng_free(buffer);
-+  }
-+  return error;
-+}
-+
-+unsigned decompress(std::vector<unsigned char>& out, const std::vector<unsigned char>& in,
-+                    const LodePNGDecompressSettings& settings)
-+{
-+  return decompress(out, in.empty() ? 0 : &in[0], in.size(), settings);
-+}
-+#endif /* LODEPNG_COMPILE_DECODER */
-+
-+#ifdef LODEPNG_COMPILE_ENCODER
-+unsigned compress(std::vector<unsigned char>& out, const unsigned char* in, size_t insize,
-+                  const LodePNGCompressSettings& settings)
-+{
-+  unsigned char* buffer = 0;
-+  size_t buffersize = 0;
-+  unsigned error = zlib_compress(&buffer, &buffersize, in, insize, &settings);
-+  if(buffer)
-+  {
-+    out.insert(out.end(), &buffer[0], &buffer[buffersize]);
-+    lodepng_free(buffer);
-+  }
-+  return error;
-+}
-+
-+unsigned compress(std::vector<unsigned char>& out, const std::vector<unsigned char>& in,
-+                  const LodePNGCompressSettings& settings)
-+{
-+  return compress(out, in.empty() ? 0 : &in[0], in.size(), settings);
-+}
-+#endif /* LODEPNG_COMPILE_ENCODER */
-+#endif /* LODEPNG_COMPILE_ZLIB */
-+
-+
-+#ifdef LODEPNG_COMPILE_PNG
-+
-+State::State()
-+{
-+  lodepng_state_init(this);
-+}
-+
-+State::State(const State& other)
-+{
-+  lodepng_state_init(this);
-+  lodepng_state_copy(this, &other);
-+}
-+
-+State::~State()
-+{
-+  lodepng_state_cleanup(this);
-+}
-+
-+State& State::operator=(const State& other)
-+{
-+  lodepng_state_copy(this, &other);
-+  return *this;
-+}
-+
-+#ifdef LODEPNG_COMPILE_DECODER
-+
-+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h, const unsigned char* in,
-+                size_t insize, LodePNGColorType colortype, unsigned bitdepth)
-+{
-+  unsigned char* buffer;
-+  unsigned error = lodepng_decode_memory(&buffer, &w, &h, in, insize, colortype, bitdepth);
-+  if(buffer && !error)
-+  {
-+    State state;
-+    state.info_raw.colortype = colortype;
-+    state.info_raw.bitdepth = bitdepth;
-+    size_t buffersize = lodepng_get_raw_size(w, h, &state.info_raw);
-+    out.insert(out.end(), &buffer[0], &buffer[buffersize]);
-+    lodepng_free(buffer);
-+  }
-+  return error;
-+}
-+
-+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h,
-+                const std::vector<unsigned char>& in, LodePNGColorType colortype, unsigned bitdepth)
-+{
-+  return decode(out, w, h, in.empty() ? 0 : &in[0], (unsigned)in.size(), colortype, bitdepth);
-+}
-+
-+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h,
-+                State& state,
-+                const unsigned char* in, size_t insize)
-+{
-+  unsigned char* buffer = NULL;
-+  unsigned error = lodepng_decode(&buffer, &w, &h, &state, in, insize);
-+  if(buffer && !error)
-+  {
-+    size_t buffersize = lodepng_get_raw_size(w, h, &state.info_raw);
-+    out.insert(out.end(), &buffer[0], &buffer[buffersize]);
-+  }
-+  lodepng_free(buffer);
-+  return error;
-+}
-+
-+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h,
-+                State& state,
-+                const std::vector<unsigned char>& in)
-+{
-+  return decode(out, w, h, state, in.empty() ? 0 : &in[0], in.size());
-+}
-+
-+#ifdef LODEPNG_COMPILE_DISK
-+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h, const std::string& filename,
-+                LodePNGColorType colortype, unsigned bitdepth)
-+{
-+  std::vector<unsigned char> buffer;
-+  unsigned error = load_file(buffer, filename);
-+  if(error) return error;
-+  return decode(out, w, h, buffer, colortype, bitdepth);
-+}
-+#endif /* LODEPNG_COMPILE_DECODER */
-+#endif /* LODEPNG_COMPILE_DISK */
-+
-+#ifdef LODEPNG_COMPILE_ENCODER
-+unsigned encode(std::vector<unsigned char>& out, const unsigned char* in, unsigned w, unsigned h,
-+                LodePNGColorType colortype, unsigned bitdepth)
-+{
-+  unsigned char* buffer;
-+  size_t buffersize;
-+  unsigned error = lodepng_encode_memory(&buffer, &buffersize, in, w, h, colortype, bitdepth);
-+  if(buffer)
-+  {
-+    out.insert(out.end(), &buffer[0], &buffer[buffersize]);
-+    lodepng_free(buffer);
-+  }
-+  return error;
-+}
-+
-+unsigned encode(std::vector<unsigned char>& out,
-+                const std::vector<unsigned char>& in, unsigned w, unsigned h,
-+                LodePNGColorType colortype, unsigned bitdepth)
-+{
-+  if(lodepng_get_raw_size_lct(w, h, colortype, bitdepth) > in.size()) return 84;
-+  return encode(out, in.empty() ? 0 : &in[0], w, h, colortype, bitdepth);
-+}
-+
-+unsigned encode(std::vector<unsigned char>& out,
-+                const unsigned char* in, unsigned w, unsigned h,
-+                State& state)
-+{
-+  unsigned char* buffer;
-+  size_t buffersize;
-+  unsigned error = lodepng_encode(&buffer, &buffersize, in, w, h, &state);
-+  if(buffer)
-+  {
-+    out.insert(out.end(), &buffer[0], &buffer[buffersize]);
-+    lodepng_free(buffer);
-+  }
-+  return error;
-+}
-+
-+unsigned encode(std::vector<unsigned char>& out,
-+                const std::vector<unsigned char>& in, unsigned w, unsigned h,
-+                State& state)
-+{
-+  if(lodepng_get_raw_size(w, h, &state.info_raw) > in.size()) return 84;
-+  return encode(out, in.empty() ? 0 : &in[0], w, h, state);
-+}
-+
-+#ifdef LODEPNG_COMPILE_DISK
-+unsigned encode(const std::string& filename,
-+                const unsigned char* in, unsigned w, unsigned h,
-+                LodePNGColorType colortype, unsigned bitdepth)
-+{
-+  std::vector<unsigned char> buffer;
-+  unsigned error = encode(buffer, in, w, h, colortype, bitdepth);
-+  if(!error) error = save_file(buffer, filename);
-+  return error;
-+}
-+
-+unsigned encode(const std::string& filename,
-+                const std::vector<unsigned char>& in, unsigned w, unsigned h,
-+                LodePNGColorType colortype, unsigned bitdepth)
-+{
-+  if(lodepng_get_raw_size_lct(w, h, colortype, bitdepth) > in.size()) return 84;
-+  return encode(filename, in.empty() ? 0 : &in[0], w, h, colortype, bitdepth);
-+}
-+#endif /* LODEPNG_COMPILE_DISK */
-+#endif /* LODEPNG_COMPILE_ENCODER */
-+#endif /* LODEPNG_COMPILE_PNG */
-+} /* namespace lodepng */
-+#endif /*LODEPNG_COMPILE_CPP*/
diff --git a/graphics/openfx-arena/files/patch-Bundle_lodepng.h b/graphics/openfx-arena/files/patch-Bundle_lodepng.h
deleted file mode 100644
index 4bbad58f74d2..000000000000
--- a/graphics/openfx-arena/files/patch-Bundle_lodepng.h
+++ /dev/null
@@ -1,1762 +0,0 @@
---- Bundle/lodepng.h.orig	2017-10-04 17:18:33 UTC
-+++ Bundle/lodepng.h
-@@ -0,0 +1,1759 @@
-+/*
-+LodePNG version 20160418
-+
-+Copyright (c) 2005-2016 Lode Vandevenne
-+
-+This software is provided 'as-is', without any express or implied
-+warranty. In no event will the authors be held liable for any damages
-+arising from the use of this software.
-+
-+Permission is granted to anyone to use this software for any purpose,
-+including commercial applications, and to alter it and redistribute it
-+freely, subject to the following restrictions:
-+
-+    1. The origin of this software must not be misrepresented; you must not
-+    claim that you wrote the original software. If you use this software
-+    in a product, an acknowledgment in the product documentation would be
-+    appreciated but is not required.
-+
-+    2. Altered source versions must be plainly marked as such, and must not be
-+    misrepresented as being the original software.
-+
-+    3. This notice may not be removed or altered from any source
-+    distribution.
-+*/
-+
-+#ifndef LODEPNG_H
-+#define LODEPNG_H
-+
-+#include <string.h> /*for size_t*/
-+
-+extern const char* LODEPNG_VERSION_STRING;
-+
-+/*
-+The following #defines are used to create code sections. They can be disabled
-+to disable code sections, which can give faster compile time and smaller binary.
-+The "NO_COMPILE" defines are designed to be used to pass as defines to the
-+compiler command to disable them without modifying this header, e.g.
-+-DLODEPNG_NO_COMPILE_ZLIB for gcc.
-+In addition to those below, you can also define LODEPNG_NO_COMPILE_CRC to
-+allow implementing a custom lodepng_crc32.
-+*/
-+/*deflate & zlib. If disabled, you must specify alternative zlib functions in
-+the custom_zlib field of the compress and decompress settings*/
-+#ifndef LODEPNG_NO_COMPILE_ZLIB
-+#define LODEPNG_COMPILE_ZLIB
-+#endif
-+/*png encoder and png decoder*/
-+#ifndef LODEPNG_NO_COMPILE_PNG
-+#define LODEPNG_COMPILE_PNG
-+#endif
-+/*deflate&zlib decoder and png decoder*/
-+#ifndef LODEPNG_NO_COMPILE_DECODER
-+#define LODEPNG_COMPILE_DECODER
-+#endif
-+/*deflate&zlib encoder and png encoder*/
-+#ifndef LODEPNG_NO_COMPILE_ENCODER
-+#define LODEPNG_COMPILE_ENCODER
-+#endif
-+/*the optional built in harddisk file loading and saving functions*/
-+#ifndef LODEPNG_NO_COMPILE_DISK
-+#define LODEPNG_COMPILE_DISK
-+#endif
-+/*support for chunks other than IHDR, IDAT, PLTE, tRNS, IEND: ancillary and unknown chunks*/
-+#ifndef LODEPNG_NO_COMPILE_ANCILLARY_CHUNKS
-+#define LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+#endif
-+/*ability to convert error numerical codes to English text string*/
-+#ifndef LODEPNG_NO_COMPILE_ERROR_TEXT
-+#define LODEPNG_COMPILE_ERROR_TEXT
-+#endif
-+/*Compile the default allocators (C's free, malloc and realloc). If you disable this,
-+you can define the functions lodepng_free, lodepng_malloc and lodepng_realloc in your
-+source files with custom allocators.*/
-+#ifndef LODEPNG_NO_COMPILE_ALLOCATORS
-+#define LODEPNG_COMPILE_ALLOCATORS
-+#endif
-+/*compile the C++ version (you can disable the C++ wrapper here even when compiling for C++)*/
-+#ifdef __cplusplus
-+#ifndef LODEPNG_NO_COMPILE_CPP
-+#define LODEPNG_COMPILE_CPP
-+#endif
-+#endif
-+
-+#ifdef LODEPNG_COMPILE_CPP
-+#include <vector>
-+#include <string>
-+#endif /*LODEPNG_COMPILE_CPP*/
-+
-+#ifdef LODEPNG_COMPILE_PNG
-+/*The PNG color types (also used for raw).*/
-+typedef enum LodePNGColorType
-+{
-+  LCT_GREY = 0, /*greyscale: 1,2,4,8,16 bit*/
-+  LCT_RGB = 2, /*RGB: 8,16 bit*/
-+  LCT_PALETTE = 3, /*palette: 1,2,4,8 bit*/
-+  LCT_GREY_ALPHA = 4, /*greyscale with alpha: 8,16 bit*/
-+  LCT_RGBA = 6 /*RGB with alpha: 8,16 bit*/
-+} LodePNGColorType;
-+
-+#ifdef LODEPNG_COMPILE_DECODER
-+/*
-+Converts PNG data in memory to raw pixel data.
-+out: Output parameter. Pointer to buffer that will contain the raw pixel data.
-+     After decoding, its size is w * h * (bytes per pixel) bytes larger than
-+     initially. Bytes per pixel depends on colortype and bitdepth.
-+     Must be freed after usage with free(*out).
-+     Note: for 16-bit per channel colors, uses big endian format like PNG does.
-+w: Output parameter. Pointer to width of pixel data.
-+h: Output parameter. Pointer to height of pixel data.
-+in: Memory buffer with the PNG file.
-+insize: size of the in buffer.
-+colortype: the desired color type for the raw output image. See explanation on PNG color types.
-+bitdepth: the desired bit depth for the raw output image. See explanation on PNG color types.
-+Return value: LodePNG error code (0 means no error).
-+*/
-+unsigned lodepng_decode_memory(unsigned char** out, unsigned* w, unsigned* h,
-+                               const unsigned char* in, size_t insize,
-+                               LodePNGColorType colortype, unsigned bitdepth);
-+
-+/*Same as lodepng_decode_memory, but always decodes to 32-bit RGBA raw image*/
-+unsigned lodepng_decode32(unsigned char** out, unsigned* w, unsigned* h,
-+                          const unsigned char* in, size_t insize);
-+
-+/*Same as lodepng_decode_memory, but always decodes to 24-bit RGB raw image*/
-+unsigned lodepng_decode24(unsigned char** out, unsigned* w, unsigned* h,
-+                          const unsigned char* in, size_t insize);
-+
-+#ifdef LODEPNG_COMPILE_DISK
-+/*
-+Load PNG from disk, from file with given name.
-+Same as the other decode functions, but instead takes a filename as input.
-+*/
-+unsigned lodepng_decode_file(unsigned char** out, unsigned* w, unsigned* h,
-+                             const char* filename,
-+                             LodePNGColorType colortype, unsigned bitdepth);
-+
-+/*Same as lodepng_decode_file, but always decodes to 32-bit RGBA raw image.*/
-+unsigned lodepng_decode32_file(unsigned char** out, unsigned* w, unsigned* h,
-+                               const char* filename);
-+
-+/*Same as lodepng_decode_file, but always decodes to 24-bit RGB raw image.*/
-+unsigned lodepng_decode24_file(unsigned char** out, unsigned* w, unsigned* h,
-+                               const char* filename);
-+#endif /*LODEPNG_COMPILE_DISK*/
-+#endif /*LODEPNG_COMPILE_DECODER*/
-+
-+
-+#ifdef LODEPNG_COMPILE_ENCODER
-+/*
-+Converts raw pixel data into a PNG image in memory. The colortype and bitdepth
-+  of the output PNG image cannot be chosen, they are automatically determined
-+  by the colortype, bitdepth and content of the input pixel data.
-+  Note: for 16-bit per channel colors, needs big endian format like PNG does.
-+out: Output parameter. Pointer to buffer that will contain the PNG image data.
-+     Must be freed after usage with free(*out).
-+outsize: Output parameter. Pointer to the size in bytes of the out buffer.
-+image: The raw pixel data to encode. The size of this buffer should be
-+       w * h * (bytes per pixel), bytes per pixel depends on colortype and bitdepth.
-+w: width of the raw pixel data in pixels.
-+h: height of the raw pixel data in pixels.
-+colortype: the color type of the raw input image. See explanation on PNG color types.
-+bitdepth: the bit depth of the raw input image. See explanation on PNG color types.
-+Return value: LodePNG error code (0 means no error).
-+*/
-+unsigned lodepng_encode_memory(unsigned char** out, size_t* outsize,
-+                               const unsigned char* image, unsigned w, unsigned h,
-+                               LodePNGColorType colortype, unsigned bitdepth);
-+
-+/*Same as lodepng_encode_memory, but always encodes from 32-bit RGBA raw image.*/
-+unsigned lodepng_encode32(unsigned char** out, size_t* outsize,
-+                          const unsigned char* image, unsigned w, unsigned h);
-+
-+/*Same as lodepng_encode_memory, but always encodes from 24-bit RGB raw image.*/
-+unsigned lodepng_encode24(unsigned char** out, size_t* outsize,
-+                          const unsigned char* image, unsigned w, unsigned h);
-+
-+#ifdef LODEPNG_COMPILE_DISK
-+/*
-+Converts raw pixel data into a PNG file on disk.
-+Same as the other encode functions, but instead takes a filename as output.
-+NOTE: This overwrites existing files without warning!
-+*/
-+unsigned lodepng_encode_file(const char* filename,
-+                             const unsigned char* image, unsigned w, unsigned h,
-+                             LodePNGColorType colortype, unsigned bitdepth);
-+
-+/*Same as lodepng_encode_file, but always encodes from 32-bit RGBA raw image.*/
-+unsigned lodepng_encode32_file(const char* filename,
-+                               const unsigned char* image, unsigned w, unsigned h);
-+
-+/*Same as lodepng_encode_file, but always encodes from 24-bit RGB raw image.*/
-+unsigned lodepng_encode24_file(const char* filename,
-+                               const unsigned char* image, unsigned w, unsigned h);
-+#endif /*LODEPNG_COMPILE_DISK*/
-+#endif /*LODEPNG_COMPILE_ENCODER*/
-+
-+
-+#ifdef LODEPNG_COMPILE_CPP
-+namespace lodepng
-+{
-+#ifdef LODEPNG_COMPILE_DECODER
-+/*Same as lodepng_decode_memory, but decodes to an std::vector. The colortype
-+is the format to output the pixels to. Default is RGBA 8-bit per channel.*/
-+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h,
-+                const unsigned char* in, size_t insize,
-+                LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8);
-+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h,
-+                const std::vector<unsigned char>& in,
-+                LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8);
-+#ifdef LODEPNG_COMPILE_DISK
-+/*
-+Converts PNG file from disk to raw pixel data in memory.
-+Same as the other decode functions, but instead takes a filename as input.
-+*/
-+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h,
-+                const std::string& filename,
-+                LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8);
-+#endif /* LODEPNG_COMPILE_DISK */
-+#endif /* LODEPNG_COMPILE_DECODER */
-+
-+#ifdef LODEPNG_COMPILE_ENCODER
-+/*Same as lodepng_encode_memory, but encodes to an std::vector. colortype
-+is that of the raw input data. The output PNG color type will be auto chosen.*/
-+unsigned encode(std::vector<unsigned char>& out,
-+                const unsigned char* in, unsigned w, unsigned h,
-+                LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8);
-+unsigned encode(std::vector<unsigned char>& out,
-+                const std::vector<unsigned char>& in, unsigned w, unsigned h,
-+                LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8);
-+#ifdef LODEPNG_COMPILE_DISK
-+/*
-+Converts 32-bit RGBA raw pixel data into a PNG file on disk.
-+Same as the other encode functions, but instead takes a filename as output.
-+NOTE: This overwrites existing files without warning!
-+*/
-+unsigned encode(const std::string& filename,
-+                const unsigned char* in, unsigned w, unsigned h,
-+                LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8);
-+unsigned encode(const std::string& filename,
-+                const std::vector<unsigned char>& in, unsigned w, unsigned h,
-+                LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8);
-+#endif /* LODEPNG_COMPILE_DISK */
-+#endif /* LODEPNG_COMPILE_ENCODER */
-+} /* namespace lodepng */
-+#endif /*LODEPNG_COMPILE_CPP*/
-+#endif /*LODEPNG_COMPILE_PNG*/
-+
-+#ifdef LODEPNG_COMPILE_ERROR_TEXT
-+/*Returns an English description of the numerical error code.*/
-+const char* lodepng_error_text(unsigned code);
-+#endif /*LODEPNG_COMPILE_ERROR_TEXT*/
-+
-+#ifdef LODEPNG_COMPILE_DECODER
-+/*Settings for zlib decompression*/
-+typedef struct LodePNGDecompressSettings LodePNGDecompressSettings;
-+struct LodePNGDecompressSettings
-+{
-+  unsigned ignore_adler32; /*if 1, continue and don't give an error message if the Adler32 checksum is corrupted*/
-+
-+  /*use custom zlib decoder instead of built in one (default: null)*/
-+  unsigned (*custom_zlib)(unsigned char**, size_t*,
-+                          const unsigned char*, size_t,
-+                          const LodePNGDecompressSettings*);
-+  /*use custom deflate decoder instead of built in one (default: null)
-+  if custom_zlib is used, custom_deflate is ignored since only the built in
-+  zlib function will call custom_deflate*/
-+  unsigned (*custom_inflate)(unsigned char**, size_t*,
-+                             const unsigned char*, size_t,
-+                             const LodePNGDecompressSettings*);
-+
-+  const void* custom_context; /*optional custom settings for custom functions*/
-+};
-+
-+extern const LodePNGDecompressSettings lodepng_default_decompress_settings;
-+void lodepng_decompress_settings_init(LodePNGDecompressSettings* settings);
-+#endif /*LODEPNG_COMPILE_DECODER*/
-+
-+#ifdef LODEPNG_COMPILE_ENCODER
-+/*
-+Settings for zlib compression. Tweaking these settings tweaks the balance
-+between speed and compression ratio.
-+*/
-+typedef struct LodePNGCompressSettings LodePNGCompressSettings;
-+struct LodePNGCompressSettings /*deflate = compress*/
-+{
-+  /*LZ77 related settings*/
-+  unsigned btype; /*the block type for LZ (0, 1, 2 or 3, see zlib standard). Should be 2 for proper compression.*/
-+  unsigned use_lz77; /*whether or not to use LZ77. Should be 1 for proper compression.*/
-+  unsigned windowsize; /*must be a power of two <= 32768. higher compresses more but is slower. Default value: 2048.*/
-+  unsigned minmatch; /*mininum lz77 length. 3 is normally best, 6 can be better for some PNGs. Default: 0*/
-+  unsigned nicematch; /*stop searching if >= this length found. Set to 258 for best compression. Default: 128*/
-+  unsigned lazymatching; /*use lazy matching: better compression but a bit slower. Default: true*/
-+
-+  /*use custom zlib encoder instead of built in one (default: null)*/
-+  unsigned (*custom_zlib)(unsigned char**, size_t*,
-+                          const unsigned char*, size_t,
-+                          const LodePNGCompressSettings*);
-+  /*use custom deflate encoder instead of built in one (default: null)
-+  if custom_zlib is used, custom_deflate is ignored since only the built in
-+  zlib function will call custom_deflate*/
-+  unsigned (*custom_deflate)(unsigned char**, size_t*,
-+                             const unsigned char*, size_t,
-+                             const LodePNGCompressSettings*);
-+
-+  const void* custom_context; /*optional custom settings for custom functions*/
-+};
-+
-+extern const LodePNGCompressSettings lodepng_default_compress_settings;
-+void lodepng_compress_settings_init(LodePNGCompressSettings* settings);
-+#endif /*LODEPNG_COMPILE_ENCODER*/
-+
-+#ifdef LODEPNG_COMPILE_PNG
-+/*
-+Color mode of an image. Contains all information required to decode the pixel
-+bits to RGBA colors. This information is the same as used in the PNG file
-+format, and is used both for PNG and raw image data in LodePNG.
-+*/
-+typedef struct LodePNGColorMode
-+{
-+  /*header (IHDR)*/
-+  LodePNGColorType colortype; /*color type, see PNG standard or documentation further in this header file*/
-+  unsigned bitdepth;  /*bits per sample, see PNG standard or documentation further in this header file*/
-+
-+  /*
-+  palette (PLTE and tRNS)
-+
-+  Dynamically allocated with the colors of the palette, including alpha.
-+  When encoding a PNG, to store your colors in the palette of the LodePNGColorMode, first use
-+  lodepng_palette_clear, then for each color use lodepng_palette_add.
-+  If you encode an image without alpha with palette, don't forget to put value 255 in each A byte of the palette.
-+
-+  When decoding, by default you can ignore this palette, since LodePNG already
-+  fills the palette colors in the pixels of the raw RGBA output.
-+
-+  The palette is only supported for color type 3.
-+  */
-+  unsigned char* palette; /*palette in RGBARGBA... order. When allocated, must be either 0, or have size 1024*/
-+  size_t palettesize; /*palette size in number of colors (amount of bytes is 4 * palettesize)*/
-+
-+  /*
-+  transparent color key (tRNS)
-+
-+  This color uses the same bit depth as the bitdepth value in this struct, which can be 1-bit to 16-bit.
-+  For greyscale PNGs, r, g and b will all 3 be set to the same.
-+
-+  When decoding, by default you can ignore this information, since LodePNG sets
-+  pixels with this key to transparent already in the raw RGBA output.
-+
-+  The color key is only supported for color types 0 and 2.
-+  */
-+  unsigned key_defined; /*is a transparent color key given? 0 = false, 1 = true*/
-+  unsigned key_r;       /*red/greyscale component of color key*/
-+  unsigned key_g;       /*green component of color key*/
-+  unsigned key_b;       /*blue component of color key*/
-+} LodePNGColorMode;
-+
-+/*init, cleanup and copy functions to use with this struct*/
-+void lodepng_color_mode_init(LodePNGColorMode* info);
-+void lodepng_color_mode_cleanup(LodePNGColorMode* info);
-+/*return value is error code (0 means no error)*/
-+unsigned lodepng_color_mode_copy(LodePNGColorMode* dest, const LodePNGColorMode* source);
-+
-+void lodepng_palette_clear(LodePNGColorMode* info);
-+/*add 1 color to the palette*/
-+unsigned lodepng_palette_add(LodePNGColorMode* info,
-+                             unsigned char r, unsigned char g, unsigned char b, unsigned char a);
-+
-+/*get the total amount of bits per pixel, based on colortype and bitdepth in the struct*/
-+unsigned lodepng_get_bpp(const LodePNGColorMode* info);
-+/*get the amount of color channels used, based on colortype in the struct.
-+If a palette is used, it counts as 1 channel.*/
-+unsigned lodepng_get_channels(const LodePNGColorMode* info);
-+/*is it a greyscale type? (only colortype 0 or 4)*/
-+unsigned lodepng_is_greyscale_type(const LodePNGColorMode* info);
-+/*has it got an alpha channel? (only colortype 2 or 6)*/
-+unsigned lodepng_is_alpha_type(const LodePNGColorMode* info);
-+/*has it got a palette? (only colortype 3)*/
-+unsigned lodepng_is_palette_type(const LodePNGColorMode* info);
-+/*only returns true if there is a palette and there is a value in the palette with alpha < 255.
-+Loops through the palette to check this.*/
-+unsigned lodepng_has_palette_alpha(const LodePNGColorMode* info);
-+/*
-+Check if the given color info indicates the possibility of having non-opaque pixels in the PNG image.
-+Returns true if the image can have translucent or invisible pixels (it still be opaque if it doesn't use such pixels).
-+Returns false if the image can only have opaque pixels.
-+In detail, it returns true only if it's a color type with alpha, or has a palette with non-opaque values,
-+or if "key_defined" is true.
-+*/
-+unsigned lodepng_can_have_alpha(const LodePNGColorMode* info);
-+/*Returns the byte size of a raw image buffer with given width, height and color mode*/
-+size_t lodepng_get_raw_size(unsigned w, unsigned h, const LodePNGColorMode* color);
-+
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+/*The information of a Time chunk in PNG.*/
-+typedef struct LodePNGTime
-+{
-+  unsigned year;    /*2 bytes used (0-65535)*/
-+  unsigned month;   /*1-12*/
-+  unsigned day;     /*1-31*/
-+  unsigned hour;    /*0-23*/
-+  unsigned minute;  /*0-59*/
-+  unsigned second;  /*0-60 (to allow for leap seconds)*/
-+} LodePNGTime;
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+
-+/*Information about the PNG image, except pixels, width and height.*/
-+typedef struct LodePNGInfo
-+{
-+  /*header (IHDR), palette (PLTE) and transparency (tRNS) chunks*/
-+  unsigned compression_method;/*compression method of the original file. Always 0.*/
-+  unsigned filter_method;     /*filter method of the original file*/
-+  unsigned interlace_method;  /*interlace method of the original file*/
-+  LodePNGColorMode color;     /*color type and bits, palette and transparency of the PNG file*/
-+
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+  /*
-+  suggested background color chunk (bKGD)
-+  This color uses the same color mode as the PNG (except alpha channel), which can be 1-bit to 16-bit.
-+
-+  For greyscale PNGs, r, g and b will all 3 be set to the same. When encoding
-+  the encoder writes the red one. For palette PNGs: When decoding, the RGB value
-+  will be stored, not a palette index. But when encoding, specify the index of
-+  the palette in background_r, the other two are then ignored.
-+
-+  The decoder does not use this background color to edit the color of pixels.
-+  */
-+  unsigned background_defined; /*is a suggested background color given?*/
-+  unsigned background_r;       /*red component of suggested background color*/
-+  unsigned background_g;       /*green component of suggested background color*/
-+  unsigned background_b;       /*blue component of suggested background color*/
-+
-+  /*
-+  non-international text chunks (tEXt and zTXt)
-+
-+  The char** arrays each contain num strings. The actual messages are in
-+  text_strings, while text_keys are keywords that give a short description what
-+  the actual text represents, e.g. Title, Author, Description, or anything else.
-+
-+  A keyword is minimum 1 character and maximum 79 characters long. It's
-+  discouraged to use a single line length longer than 79 characters for texts.
-+
-+  Don't allocate these text buffers yourself. Use the init/cleanup functions
-+  correctly and use lodepng_add_text and lodepng_clear_text.
-+  */
-+  size_t text_num; /*the amount of texts in these char** buffers (there may be more texts in itext)*/
-+  char** text_keys; /*the keyword of a text chunk (e.g. "Comment")*/
-+  char** text_strings; /*the actual text*/
-+
-+  /*
-+  international text chunks (iTXt)
-+  Similar to the non-international text chunks, but with additional strings
-+  "langtags" and "transkeys".
-+  */
-+  size_t itext_num; /*the amount of international texts in this PNG*/
-+  char** itext_keys; /*the English keyword of the text chunk (e.g. "Comment")*/
-+  char** itext_langtags; /*language tag for this text's language, ISO/IEC 646 string, e.g. ISO 639 language tag*/
-+  char** itext_transkeys; /*keyword translated to the international language - UTF-8 string*/
-+  char** itext_strings; /*the actual international text - UTF-8 string*/
-+
-+  /*time chunk (tIME)*/
-+  unsigned time_defined; /*set to 1 to make the encoder generate a tIME chunk*/
-+  LodePNGTime time;
-+
-+  /*phys chunk (pHYs)*/
-+  unsigned phys_defined; /*if 0, there is no pHYs chunk and the values below are undefined, if 1 else there is one*/
-+  unsigned phys_x; /*pixels per unit in x direction*/
-+  unsigned phys_y; /*pixels per unit in y direction*/
-+  unsigned phys_unit; /*may be 0 (unknown unit) or 1 (metre)*/
-+
-+  /*
-+  unknown chunks
-+  There are 3 buffers, one for each position in the PNG where unknown chunks can appear
-+  each buffer contains all unknown chunks for that position consecutively
-+  The 3 buffers are the unknown chunks between certain critical chunks:
-+  0: IHDR-PLTE, 1: PLTE-IDAT, 2: IDAT-IEND
-+  Do not allocate or traverse this data yourself. Use the chunk traversing functions declared
-+  later, such as lodepng_chunk_next and lodepng_chunk_append, to read/write this struct.
-+  */
-+  unsigned char* unknown_chunks_data[3];
-+  size_t unknown_chunks_size[3]; /*size in bytes of the unknown chunks, given for protection*/
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+} LodePNGInfo;
-+
-+/*init, cleanup and copy functions to use with this struct*/
-+void lodepng_info_init(LodePNGInfo* info);
-+void lodepng_info_cleanup(LodePNGInfo* info);
-+/*return value is error code (0 means no error)*/
-+unsigned lodepng_info_copy(LodePNGInfo* dest, const LodePNGInfo* source);
-+
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+void lodepng_clear_text(LodePNGInfo* info); /*use this to clear the texts again after you filled them in*/
-+unsigned lodepng_add_text(LodePNGInfo* info, const char* key, const char* str); /*push back both texts at once*/
-+
-+void lodepng_clear_itext(LodePNGInfo* info); /*use this to clear the itexts again after you filled them in*/
-+unsigned lodepng_add_itext(LodePNGInfo* info, const char* key, const char* langtag,
-+                           const char* transkey, const char* str); /*push back the 4 texts of 1 chunk at once*/
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+
-+/*
-+Converts raw buffer from one color type to another color type, based on
-+LodePNGColorMode structs to describe the input and output color type.
-+See the reference manual at the end of this header file to see which color conversions are supported.
-+return value = LodePNG error code (0 if all went ok, an error if the conversion isn't supported)
-+The out buffer must have size (w * h * bpp + 7) / 8, where bpp is the bits per pixel
-+of the output color type (lodepng_get_bpp).
-+For < 8 bpp images, there should not be padding bits at the end of scanlines.
-+For 16-bit per channel colors, uses big endian format like PNG does.
-+Return value is LodePNG error code
-+*/
-+unsigned lodepng_convert(unsigned char* out, const unsigned char* in,
-+                         const LodePNGColorMode* mode_out, const LodePNGColorMode* mode_in,
-+                         unsigned w, unsigned h);
-+
-+#ifdef LODEPNG_COMPILE_DECODER
-+/*
-+Settings for the decoder. This contains settings for the PNG and the Zlib
-+decoder, but not the Info settings from the Info structs.
-+*/
-+typedef struct LodePNGDecoderSettings
-+{
-+  LodePNGDecompressSettings zlibsettings; /*in here is the setting to ignore Adler32 checksums*/
-+
-+  unsigned ignore_crc; /*ignore CRC checksums*/
-+
-+  unsigned color_convert; /*whether to convert the PNG to the color type you want. Default: yes*/
-+
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+  unsigned read_text_chunks; /*if false but remember_unknown_chunks is true, they're stored in the unknown chunks*/
-+  /*store all bytes from unknown chunks in the LodePNGInfo (off by default, useful for a png editor)*/
-+  unsigned remember_unknown_chunks;
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+} LodePNGDecoderSettings;
-+
-+void lodepng_decoder_settings_init(LodePNGDecoderSettings* settings);
-+#endif /*LODEPNG_COMPILE_DECODER*/
-+
-+#ifdef LODEPNG_COMPILE_ENCODER
-+/*automatically use color type with less bits per pixel if losslessly possible. Default: AUTO*/
-+typedef enum LodePNGFilterStrategy
-+{
-+  /*every filter at zero*/
-+  LFS_ZERO,
-+  /*Use filter that gives minimum sum, as described in the official PNG filter heuristic.*/
-+  LFS_MINSUM,
-+  /*Use the filter type that gives smallest Shannon entropy for this scanline. Depending
-+  on the image, this is better or worse than minsum.*/
-+  LFS_ENTROPY,
-+  /*
-+  Brute-force-search PNG filters by compressing each filter for each scanline.
-+  Experimental, very slow, and only rarely gives better compression than MINSUM.
-+  */
-+  LFS_BRUTE_FORCE,
-+  /*use predefined_filters buffer: you specify the filter type for each scanline*/
-+  LFS_PREDEFINED
-+} LodePNGFilterStrategy;
-+
-+/*Gives characteristics about the colors of the image, which helps decide which color model to use for encoding.
-+Used internally by default if "auto_convert" is enabled. Public because it's useful for custom algorithms.*/
-+typedef struct LodePNGColorProfile
-+{
-+  unsigned colored; /*not greyscale*/
-+  unsigned key; /*if true, image is not opaque. Only if true and alpha is false, color key is possible.*/
-+  unsigned short key_r; /*these values are always in 16-bit bitdepth in the profile*/
-+  unsigned short key_g;
-+  unsigned short key_b;
-+  unsigned alpha; /*alpha channel or alpha palette required*/
-+  unsigned numcolors; /*amount of colors, up to 257. Not valid if bits == 16.*/
-+  unsigned char palette[1024]; /*Remembers up to the first 256 RGBA colors, in no particular order*/
-+  unsigned bits; /*bits per channel (not for palette). 1,2 or 4 for greyscale only. 16 if 16-bit per channel required.*/
-+} LodePNGColorProfile;
-+
-+void lodepng_color_profile_init(LodePNGColorProfile* profile);
-+
-+/*Get a LodePNGColorProfile of the image.*/
-+unsigned lodepng_get_color_profile(LodePNGColorProfile* profile,
-+                                   const unsigned char* image, unsigned w, unsigned h,
-+                                   const LodePNGColorMode* mode_in);
-+/*The function LodePNG uses internally to decide the PNG color with auto_convert.
-+Chooses an optimal color model, e.g. grey if only grey pixels, palette if < 256 colors, ...*/
-+unsigned lodepng_auto_choose_color(LodePNGColorMode* mode_out,
-+                                   const unsigned char* image, unsigned w, unsigned h,
-+                                   const LodePNGColorMode* mode_in);
-+
-+/*Settings for the encoder.*/
-+typedef struct LodePNGEncoderSettings
-+{
-+  LodePNGCompressSettings zlibsettings; /*settings for the zlib encoder, such as window size, ...*/
-+
-+  unsigned auto_convert; /*automatically choose output PNG color type. Default: true*/
-+
-+  /*If true, follows the official PNG heuristic: if the PNG uses a palette or lower than
-+  8 bit depth, set all filters to zero. Otherwise use the filter_strategy. Note that to
-+  completely follow the official PNG heuristic, filter_palette_zero must be true and
-+  filter_strategy must be LFS_MINSUM*/
-+  unsigned filter_palette_zero;
-+  /*Which filter strategy to use when not using zeroes due to filter_palette_zero.
-+  Set filter_palette_zero to 0 to ensure always using your chosen strategy. Default: LFS_MINSUM*/
-+  LodePNGFilterStrategy filter_strategy;
-+  /*used if filter_strategy is LFS_PREDEFINED. In that case, this must point to a buffer with
-+  the same length as the amount of scanlines in the image, and each value must <= 5. You
-+  have to cleanup this buffer, LodePNG will never free it. Don't forget that filter_palette_zero
-+  must be set to 0 to ensure this is also used on palette or low bitdepth images.*/
-+  const unsigned char* predefined_filters;
-+
-+  /*force creating a PLTE chunk if colortype is 2 or 6 (= a suggested palette).
-+  If colortype is 3, PLTE is _always_ created.*/
-+  unsigned force_palette;
-+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-+  /*add LodePNG identifier and version as a text chunk, for debugging*/
-+  unsigned add_id;
-+  /*encode text chunks as zTXt chunks instead of tEXt chunks, and use compression in iTXt chunks*/
-+  unsigned text_compression;
-+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-+} LodePNGEncoderSettings;
-+
-+void lodepng_encoder_settings_init(LodePNGEncoderSettings* settings);
-+#endif /*LODEPNG_COMPILE_ENCODER*/
-+
-+
-+#if defined(LODEPNG_COMPILE_DECODER) || defined(LODEPNG_COMPILE_ENCODER)
-+/*The settings, state and information for extended encoding and decoding.*/
-+typedef struct LodePNGState
-+{
-+#ifdef LODEPNG_COMPILE_DECODER
-+  LodePNGDecoderSettings decoder; /*the decoding settings*/
-+#endif /*LODEPNG_COMPILE_DECODER*/
-+#ifdef LODEPNG_COMPILE_ENCODER
-+  LodePNGEncoderSettings encoder; /*the encoding settings*/
-+#endif /*LODEPNG_COMPILE_ENCODER*/
-+  LodePNGColorMode info_raw; /*specifies the format in which you would like to get the raw pixel buffer*/
-+  LodePNGInfo info_png; /*info of the PNG image obtained after decoding*/
-+  unsigned error;
-+#ifdef LODEPNG_COMPILE_CPP
-+  /* For the lodepng::State subclass. */
-+  virtual ~LodePNGState(){}
-+#endif
-+} LodePNGState;
-+
-+/*init, cleanup and copy functions to use with this struct*/
-+void lodepng_state_init(LodePNGState* state);
-+void lodepng_state_cleanup(LodePNGState* state);
-+void lodepng_state_copy(LodePNGState* dest, const LodePNGState* source);
-+#endif /* defined(LODEPNG_COMPILE_DECODER) || defined(LODEPNG_COMPILE_ENCODER) */
-+
-+#ifdef LODEPNG_COMPILE_DECODER
-+/*
-+Same as lodepng_decode_memory, but uses a LodePNGState to allow custom settings and
-+getting much more information about the PNG image and color mode.
-+*/
-+unsigned lodepng_decode(unsigned char** out, unsigned* w, unsigned* h,
-+                        LodePNGState* state,
-+                        const unsigned char* in, size_t insize);
-+
-+/*
-+Read the PNG header, but not the actual data. This returns only the information
-+that is in the header chunk of the PNG, such as width, height and color type. The
-+information is placed in the info_png field of the LodePNGState.
-+*/
-+unsigned lodepng_inspect(unsigned* w, unsigned* h,
-+                         LodePNGState* state,
-+                         const unsigned char* in, size_t insize);
-+#endif /*LODEPNG_COMPILE_DECODER*/
-+
-+
-+#ifdef LODEPNG_COMPILE_ENCODER
-+/*This function allocates the out buffer with standard malloc and stores the size in *outsize.*/
-+unsigned lodepng_encode(unsigned char** out, size_t* outsize,
-+                        const unsigned char* image, unsigned w, unsigned h,
-+                        LodePNGState* state);
-+#endif /*LODEPNG_COMPILE_ENCODER*/
-+
-+/*
-+The lodepng_chunk functions are normally not needed, except to traverse the
-+unknown chunks stored in the LodePNGInfo struct, or add new ones to it.
-+It also allows traversing the chunks of an encoded PNG file yourself.
-+
-+PNG standard chunk naming conventions:
-+First byte: uppercase = critical, lowercase = ancillary
-+Second byte: uppercase = public, lowercase = private
-+Third byte: must be uppercase
-+Fourth byte: uppercase = unsafe to copy, lowercase = safe to copy
-+*/
-+
-+/*
-+Gets the length of the data of the chunk. Total chunk length has 12 bytes more.
-+There must be at least 4 bytes to read from. If the result value is too large,
-+it may be corrupt data.
-+*/
-+unsigned lodepng_chunk_length(const unsigned char* chunk);
-+
-+/*puts the 4-byte type in null terminated string*/
-+void lodepng_chunk_type(char type[5], const unsigned char* chunk);
-+
-+/*check if the type is the given type*/
-+unsigned char lodepng_chunk_type_equals(const unsigned char* chunk, const char* type);
-+
-+/*0: it's one of the critical chunk types, 1: it's an ancillary chunk (see PNG standard)*/
-+unsigned char lodepng_chunk_ancillary(const unsigned char* chunk);
-+
-+/*0: public, 1: private (see PNG standard)*/
-+unsigned char lodepng_chunk_private(const unsigned char* chunk);
-+
-+/*0: the chunk is unsafe to copy, 1: the chunk is safe to copy (see PNG standard)*/
-+unsigned char lodepng_chunk_safetocopy(const unsigned char* chunk);
-+
-+/*get pointer to the data of the chunk, where the input points to the header of the chunk*/
-+unsigned char* lodepng_chunk_data(unsigned char* chunk);
-+const unsigned char* lodepng_chunk_data_const(const unsigned char* chunk);
-+
-+/*returns 0 if the crc is correct, 1 if it's incorrect (0 for OK as usual!)*/
-+unsigned lodepng_chunk_check_crc(const unsigned char* chunk);
-+
-+/*generates the correct CRC from the data and puts it in the last 4 bytes of the chunk*/
-+void lodepng_chunk_generate_crc(unsigned char* chunk);
-+
-+/*iterate to next chunks. don't use on IEND chunk, as there is no next chunk then*/
-+unsigned char* lodepng_chunk_next(unsigned char* chunk);
-+const unsigned char* lodepng_chunk_next_const(const unsigned char* chunk);
-+
-+/*
-+Appends chunk to the data in out. The given chunk should already have its chunk header.
-+The out variable and outlength are updated to reflect the new reallocated buffer.
-+Returns error code (0 if it went ok)
-+*/
-+unsigned lodepng_chunk_append(unsigned char** out, size_t* outlength, const unsigned char* chunk);
-+
-+/*
-+Appends new chunk to out. The chunk to append is given by giving its length, type
-+and data separately. The type is a 4-letter string.
-+The out variable and outlength are updated to reflect the new reallocated buffer.
-+Returne error code (0 if it went ok)
-+*/
-+unsigned lodepng_chunk_create(unsigned char** out, size_t* outlength, unsigned length,
-+                              const char* type, const unsigned char* data);
-+
-+
-+/*Calculate CRC32 of buffer*/
-+unsigned lodepng_crc32(const unsigned char* buf, size_t len);
-+#endif /*LODEPNG_COMPILE_PNG*/
-+
-+
-+#ifdef LODEPNG_COMPILE_ZLIB
-+/*
-+This zlib part can be used independently to zlib compress and decompress a
-+buffer. It cannot be used to create gzip files however, and it only supports the
-+part of zlib that is required for PNG, it does not support dictionaries.
-+*/
-+
-+#ifdef LODEPNG_COMPILE_DECODER
-+/*Inflate a buffer. Inflate is the decompression step of deflate. Out buffer must be freed after use.*/
-+unsigned lodepng_inflate(unsigned char** out, size_t* outsize,
-+                         const unsigned char* in, size_t insize,
-+                         const LodePNGDecompressSettings* settings);
-+
-+/*
-+Decompresses Zlib data. Reallocates the out buffer and appends the data. The
-+data must be according to the zlib specification.
-+Either, *out must be NULL and *outsize must be 0, or, *out must be a valid
-+buffer and *outsize its size in bytes. out must be freed by user after usage.
-+*/
-+unsigned lodepng_zlib_decompress(unsigned char** out, size_t* outsize,
-+                                 const unsigned char* in, size_t insize,
-+                                 const LodePNGDecompressSettings* settings);
-+#endif /*LODEPNG_COMPILE_DECODER*/
-+
-+#ifdef LODEPNG_COMPILE_ENCODER
-+/*
-+Compresses data with Zlib. Reallocates the out buffer and appends the data.
-+Zlib adds a small header and trailer around the deflate data.
-+The data is output in the format of the zlib specification.
-+Either, *out must be NULL and *outsize must be 0, or, *out must be a valid
-+buffer and *outsize its size in bytes. out must be freed by user after usage.
-+*/
-+unsigned lodepng_zlib_compress(unsigned char** out, size_t* outsize,
-+                               const unsigned char* in, size_t insize,
-+                               const LodePNGCompressSettings* settings);
-+
-+/*
-+Find length-limited Huffman code for given frequencies. This function is in the
-+public interface only for tests, it's used internally by lodepng_deflate.
-+*/
-+unsigned lodepng_huffman_code_lengths(unsigned* lengths, const unsigned* frequencies,
-+                                      size_t numcodes, unsigned maxbitlen);
-+
-+/*Compress a buffer with deflate. See RFC 1951. Out buffer must be freed after use.*/
-+unsigned lodepng_deflate(unsigned char** out, size_t* outsize,
-+                         const unsigned char* in, size_t insize,
-+                         const LodePNGCompressSettings* settings);
-+
-+#endif /*LODEPNG_COMPILE_ENCODER*/
-+#endif /*LODEPNG_COMPILE_ZLIB*/
-+
-+#ifdef LODEPNG_COMPILE_DISK
-+/*
-+Load a file from disk into buffer. The function allocates the out buffer, and
-+after usage you should free it.
-+out: output parameter, contains pointer to loaded buffer.
-+outsize: output parameter, size of the allocated out buffer
-+filename: the path to the file to load
-+return value: error code (0 means ok)
-+*/
-+unsigned lodepng_load_file(unsigned char** out, size_t* outsize, const char* filename);
-+
-+/*
-+Save a file from buffer to disk. Warning, if it exists, this function overwrites
-+the file without warning!
-+buffer: the buffer to write
-+buffersize: size of the buffer to write
-+filename: the path to the file to save to
-+return value: error code (0 means ok)
-+*/
-+unsigned lodepng_save_file(const unsigned char* buffer, size_t buffersize, const char* filename);
-+#endif /*LODEPNG_COMPILE_DISK*/
-+
-+#ifdef LODEPNG_COMPILE_CPP
-+/* The LodePNG C++ wrapper uses std::vectors instead of manually allocated memory buffers. */
-+namespace lodepng
-+{
-+#ifdef LODEPNG_COMPILE_PNG
-+class State : public LodePNGState
-+{
-+  public:
-+    State();
-+    State(const State& other);
-+    virtual ~State();
-+    State& operator=(const State& other);
-+};
-+
-+#ifdef LODEPNG_COMPILE_DECODER
-+/* Same as other lodepng::decode, but using a State for more settings and information. */
-+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h,
-+                State& state,
-+                const unsigned char* in, size_t insize);
-+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h,
-+                State& state,
-+                const std::vector<unsigned char>& in);
-+#endif /*LODEPNG_COMPILE_DECODER*/
-+
-+#ifdef LODEPNG_COMPILE_ENCODER
-+/* Same as other lodepng::encode, but using a State for more settings and information. */
-+unsigned encode(std::vector<unsigned char>& out,
-+                const unsigned char* in, unsigned w, unsigned h,
-+                State& state);
-+unsigned encode(std::vector<unsigned char>& out,
-+                const std::vector<unsigned char>& in, unsigned w, unsigned h,
-+                State& state);
-+#endif /*LODEPNG_COMPILE_ENCODER*/
-+
-+#ifdef LODEPNG_COMPILE_DISK
-+/*
-+Load a file from disk into an std::vector.
-+return value: error code (0 means ok)
-+*/
-+unsigned load_file(std::vector<unsigned char>& buffer, const std::string& filename);
-+
-+/*
-+Save the binary data in an std::vector to a file on disk. The file is overwritten
-+without warning.
-+*/
-+unsigned save_file(const std::vector<unsigned char>& buffer, const std::string& filename);
-+#endif /* LODEPNG_COMPILE_DISK */
-+#endif /* LODEPNG_COMPILE_PNG */
-+
-+#ifdef LODEPNG_COMPILE_ZLIB
-+#ifdef LODEPNG_COMPILE_DECODER
-+/* Zlib-decompress an unsigned char buffer */
-+unsigned decompress(std::vector<unsigned char>& out, const unsigned char* in, size_t insize,
-+                    const LodePNGDecompressSettings& settings = lodepng_default_decompress_settings);
-+
-+/* Zlib-decompress an std::vector */
-+unsigned decompress(std::vector<unsigned char>& out, const std::vector<unsigned char>& in,
-+                    const LodePNGDecompressSettings& settings = lodepng_default_decompress_settings);
-+#endif /* LODEPNG_COMPILE_DECODER */
-+
-+#ifdef LODEPNG_COMPILE_ENCODER
-+/* Zlib-compress an unsigned char buffer */
-+unsigned compress(std::vector<unsigned char>& out, const unsigned char* in, size_t insize,
-+                  const LodePNGCompressSettings& settings = lodepng_default_compress_settings);
-+
-+/* Zlib-compress an std::vector */
-+unsigned compress(std::vector<unsigned char>& out, const std::vector<unsigned char>& in,
-+                  const LodePNGCompressSettings& settings = lodepng_default_compress_settings);
-+#endif /* LODEPNG_COMPILE_ENCODER */
-+#endif /* LODEPNG_COMPILE_ZLIB */
-+} /* namespace lodepng */
-+#endif /*LODEPNG_COMPILE_CPP*/
-+
-+/*
-+TODO:
-+[.] test if there are no memory leaks or security exploits - done a lot but needs to be checked often
-+[.] check compatibility with various compilers  - done but needs to be redone for every newer version
-+[X] converting color to 16-bit per channel types
-+[ ] read all public PNG chunk types (but never let the color profile and gamma ones touch RGB values)
-+[ ] make sure encoder generates no chunks with size > (2^31)-1
-+[ ] partial decoding (stream processing)
-+[X] let the "isFullyOpaque" function check color keys and transparent palettes too
-+[X] better name for the variables "codes", "codesD", "codelengthcodes", "clcl" and "lldl"
-+[ ] don't stop decoding on errors like 69, 57, 58 (make warnings)
-+[ ] let the C++ wrapper catch exceptions coming from the standard library and return LodePNG error codes
-+[ ] allow user to provide custom color conversion functions, e.g. for premultiplied alpha, padding bits or not, ...
-+[ ] allow user to give data (void*) to custom allocator
-+*/
-+
-+#endif /*LODEPNG_H inclusion guard*/
-+
-+/*
-+LodePNG Documentation
-+---------------------
-+
-+0. table of contents
-+--------------------
-+
-+  1. about
-+   1.1. supported features
-+   1.2. features not supported
-+  2. C and C++ version
-+  3. security
-+  4. decoding
-+  5. encoding
-+  6. color conversions
-+    6.1. PNG color types
-+    6.2. color conversions
-+    6.3. padding bits
-+    6.4. A note about 16-bits per channel and endianness
-+  7. error values
-+  8. chunks and PNG editing
-+  9. compiler support
-+  10. examples
-+   10.1. decoder C++ example
-+   10.2. decoder C example
-+  11. state settings reference
-+  12. changes
-+  13. contact information
-+
-+
-+1. about
-+--------
-+
-+PNG is a file format to store raster images losslessly with good compression,
-+supporting different color types and alpha channel.
-+
-+LodePNG is a PNG codec according to the Portable Network Graphics (PNG)
-+Specification (Second Edition) - W3C Recommendation 10 November 2003.
-+
-+The specifications used are:
-+
-+*) Portable Network Graphics (PNG) Specification (Second Edition):
-+     http://www.w3.org/TR/2003/REC-PNG-20031110
-+*) RFC 1950 ZLIB Compressed Data Format version 3.3:
-+     http://www.gzip.org/zlib/rfc-zlib.html
-+*) RFC 1951 DEFLATE Compressed Data Format Specification ver 1.3:
-+     http://www.gzip.org/zlib/rfc-deflate.html
-+
-+The most recent version of LodePNG can currently be found at
-+http://lodev.org/lodepng/
-+
-+LodePNG works both in C (ISO C90) and C++, with a C++ wrapper that adds
-+extra functionality.
-+
-+LodePNG exists out of two files:
-+-lodepng.h: the header file for both C and C++
-+-lodepng.c(pp): give it the name lodepng.c or lodepng.cpp (or .cc) depending on your usage
-+
-+If you want to start using LodePNG right away without reading this doc, get the
-+examples from the LodePNG website to see how to use it in code, or check the
-+smaller examples in chapter 13 here.
-+
-+LodePNG is simple but only supports the basic requirements. To achieve
-+simplicity, the following design choices were made: There are no dependencies
-+on any external library. There are functions to decode and encode a PNG with
-+a single function call, and extended versions of these functions taking a
-+LodePNGState struct allowing to specify or get more information. By default
-+the colors of the raw image are always RGB or RGBA, no matter what color type
-+the PNG file uses. To read and write files, there are simple functions to
-+convert the files to/from buffers in memory.
-+
-+This all makes LodePNG suitable for loading textures in games, demos and small
-+programs, ... It's less suitable for full fledged image editors, loading PNGs
-+over network (it requires all the image data to be available before decoding can
-+begin), life-critical systems, ...
-+
-+1.1. supported features
-+-----------------------
-+
-+The following features are supported by the decoder:
-+
-+*) decoding of PNGs with any color type, bit depth and interlace mode, to a 24- or 32-bit color raw image,
-+   or the same color type as the PNG
-+*) encoding of PNGs, from any raw image to 24- or 32-bit color, or the same color type as the raw image
-+*) Adam7 interlace and deinterlace for any color type
-+*) loading the image from harddisk or decoding it from a buffer from other sources than harddisk
-+*) support for alpha channels, including RGBA color model, translucent palettes and color keying
-+*) zlib decompression (inflate)
-+*) zlib compression (deflate)
-+*) CRC32 and ADLER32 checksums
-+*) handling of unknown chunks, allowing making a PNG editor that stores custom and unknown chunks.
-+*) the following chunks are supported (generated/interpreted) by both encoder and decoder:
-+    IHDR: header information
-+    PLTE: color palette
-+    IDAT: pixel data
-+    IEND: the final chunk
-+    tRNS: transparency for palettized images
-+    tEXt: textual information
-+    zTXt: compressed textual information
-+    iTXt: international textual information
-+    bKGD: suggested background color
-+    pHYs: physical dimensions
-+    tIME: modification time
-+
-+1.2. features not supported
-+---------------------------
-+
-+The following features are _not_ supported:
-+
-+*) some features needed to make a conformant PNG-Editor might be still missing.
-+*) partial loading/stream processing. All data must be available and is processed in one call.
-+*) The following public chunks are not supported but treated as unknown chunks by LodePNG
-+    cHRM, gAMA, iCCP, sRGB, sBIT, hIST, sPLT
-+   Some of these are not supported on purpose: LodePNG wants to provide the RGB values
-+   stored in the pixels, not values modified by system dependent gamma or color models.
-+
-+
-+2. C and C++ version
-+--------------------
-+
-+The C version uses buffers allocated with alloc that you need to free()
-+yourself. You need to use init and cleanup functions for each struct whenever
-+using a struct from the C version to avoid exploits and memory leaks.
-+
-+The C++ version has extra functions with std::vectors in the interface and the
-+lodepng::State class which is a LodePNGState with constructor and destructor.
-+
-+These files work without modification for both C and C++ compilers because all
-+the additional C++ code is in "#ifdef __cplusplus" blocks that make C-compilers
-+ignore it, and the C code is made to compile both with strict ISO C90 and C++.
-+
-+To use the C++ version, you need to rename the source file to lodepng.cpp
-+(instead of lodepng.c), and compile it with a C++ compiler.
-+
-+To use the C version, you need to rename the source file to lodepng.c (instead
-+of lodepng.cpp), and compile it with a C compiler.
-+
-+
-+3. Security
-+-----------
-+
-+Even if carefully designed, it's always possible that LodePNG contains possible
-+exploits. If you discover one, please let me know, and it will be fixed.
-+
-+When using LodePNG, care has to be taken with the C version of LodePNG, as well
-+as the C-style structs when working with C++. The following conventions are used
-+for all C-style structs:
-+
-+-if a struct has a corresponding init function, always call the init function when making a new one
-+-if a struct has a corresponding cleanup function, call it before the struct disappears to avoid memory leaks
-+-if a struct has a corresponding copy function, use the copy function instead of "=".
-+ The destination must also be inited already.
-+
-+
-+4. Decoding
-+-----------
-+
-+Decoding converts a PNG compressed image to a raw pixel buffer.
-+
-+Most documentation on using the decoder is at its declarations in the header
-+above. For C, simple decoding can be done with functions such as
-+lodepng_decode32, and more advanced decoding can be done with the struct
-+LodePNGState and lodepng_decode. For C++, all decoding can be done with the
-+various lodepng::decode functions, and lodepng::State can be used for advanced
-+features.
-+
-+When using the LodePNGState, it uses the following fields for decoding:
-+*) LodePNGInfo info_png: it stores extra information about the PNG (the input) in here
-+*) LodePNGColorMode info_raw: here you can say what color mode of the raw image (the output) you want to get
-+*) LodePNGDecoderSettings decoder: you can specify a few extra settings for the decoder to use
-+
-+LodePNGInfo info_png
-+--------------------
-+
-+After decoding, this contains extra information of the PNG image, except the actual
-+pixels, width and height because these are already gotten directly from the decoder
-+functions.
-+
-+It contains for example the original color type of the PNG image, text comments,
-+suggested background color, etc... More details about the LodePNGInfo struct are
-+at its declaration documentation.
-+
-+LodePNGColorMode info_raw
-+-------------------------
-+
-+When decoding, here you can specify which color type you want
-+the resulting raw image to be. If this is different from the colortype of the
-+PNG, then the decoder will automatically convert the result. This conversion
-+always works, except if you want it to convert a color PNG to greyscale or to
-+a palette with missing colors.
-+
-+By default, 32-bit color is used for the result.
-+
-+LodePNGDecoderSettings decoder
-+------------------------------
-+
-+The settings can be used to ignore the errors created by invalid CRC and Adler32
-+chunks, and to disable the decoding of tEXt chunks.
-+
-+There's also a setting color_convert, true by default. If false, no conversion
-+is done, the resulting data will be as it was in the PNG (after decompression)
-+and you'll have to puzzle the colors of the pixels together yourself using the
-+color type information in the LodePNGInfo.
-+
-+
-+5. Encoding
-+-----------
-+
-+Encoding converts a raw pixel buffer to a PNG compressed image.
-+
-+Most documentation on using the encoder is at its declarations in the header
-+above. For C, simple encoding can be done with functions such as
-+lodepng_encode32, and more advanced decoding can be done with the struct
-+LodePNGState and lodepng_encode. For C++, all encoding can be done with the
-+various lodepng::encode functions, and lodepng::State can be used for advanced
-+features.
-+
-+Like the decoder, the encoder can also give errors. However it gives less errors
-+since the encoder input is trusted, the decoder input (a PNG image that could
-+be forged by anyone) is not trusted.
-+
-+When using the LodePNGState, it uses the following fields for encoding:
-+*) LodePNGInfo info_png: here you specify how you want the PNG (the output) to be.
-+*) LodePNGColorMode info_raw: here you say what color type of the raw image (the input) has
-+*) LodePNGEncoderSettings encoder: you can specify a few settings for the encoder to use
-+
-+LodePNGInfo info_png
-+--------------------
-+
-+When encoding, you use this the opposite way as when decoding: for encoding,
-+you fill in the values you want the PNG to have before encoding. By default it's
-+not needed to specify a color type for the PNG since it's automatically chosen,
-+but it's possible to choose it yourself given the right settings.
-+
-+The encoder will not always exactly match the LodePNGInfo struct you give,
-+it tries as close as possible. Some things are ignored by the encoder. The
-+encoder uses, for example, the following settings from it when applicable:
-+colortype and bitdepth, text chunks, time chunk, the color key, the palette, the
-+background color, the interlace method, unknown chunks, ...
-+
-+When encoding to a PNG with colortype 3, the encoder will generate a PLTE chunk.
-+If the palette contains any colors for which the alpha channel is not 255 (so
-+there are translucent colors in the palette), it'll add a tRNS chunk.
-+
-+LodePNGColorMode info_raw
-+-------------------------
-+
-+You specify the color type of the raw image that you give to the input here,
-+including a possible transparent color key and palette you happen to be using in
-+your raw image data.
-+
-+By default, 32-bit color is assumed, meaning your input has to be in RGBA
-+format with 4 bytes (unsigned chars) per pixel.
-+
-+LodePNGEncoderSettings encoder
-+------------------------------
-+
-+The following settings are supported (some are in sub-structs):
-+*) auto_convert: when this option is enabled, the encoder will
-+automatically choose the smallest possible color mode (including color key) that
-+can encode the colors of all pixels without information loss.
-+*) btype: the block type for LZ77. 0 = uncompressed, 1 = fixed huffman tree,
-+   2 = dynamic huffman tree (best compression). Should be 2 for proper
-+   compression.
-+*) use_lz77: whether or not to use LZ77 for compressed block types. Should be
-+   true for proper compression.
-+*) windowsize: the window size used by the LZ77 encoder (1 - 32768). Has value
-+   2048 by default, but can be set to 32768 for better, but slow, compression.
-+*) force_palette: if colortype is 2 or 6, you can make the encoder write a PLTE
-+   chunk if force_palette is true. This can used as suggested palette to convert
-+   to by viewers that don't support more than 256 colors (if those still exist)
-+*) add_id: add text chunk "Encoder: LodePNG <version>" to the image.
-+*) text_compression: default 1. If 1, it'll store texts as zTXt instead of tEXt chunks.
-+  zTXt chunks use zlib compression on the text. This gives a smaller result on
-+  large texts but a larger result on small texts (such as a single program name).
-+  It's all tEXt or all zTXt though, there's no separate setting per text yet.
-+
-+
-+6. color conversions
-+--------------------
-+
-+An important thing to note about LodePNG, is that the color type of the PNG, and
-+the color type of the raw image, are completely independent. By default, when
-+you decode a PNG, you get the result as a raw image in the color type you want,
-+no matter whether the PNG was encoded with a palette, greyscale or RGBA color.
-+And if you encode an image, by default LodePNG will automatically choose the PNG
-+color type that gives good compression based on the values of colors and amount
-+of colors in the image. It can be configured to let you control it instead as
-+well, though.
-+
-+To be able to do this, LodePNG does conversions from one color mode to another.
-+It can convert from almost any color type to any other color type, except the
-+following conversions: RGB to greyscale is not supported, and converting to a
-+palette when the palette doesn't have a required color is not supported. This is
-+not supported on purpose: this is information loss which requires a color
-+reduction algorithm that is beyong the scope of a PNG encoder (yes, RGB to grey
-+is easy, but there are multiple ways if you want to give some channels more
-+weight).
-+
-+By default, when decoding, you get the raw image in 32-bit RGBA or 24-bit RGB
-+color, no matter what color type the PNG has. And by default when encoding,
-+LodePNG automatically picks the best color model for the output PNG, and expects
-+the input image to be 32-bit RGBA or 24-bit RGB. So, unless you want to control
-+the color format of the images yourself, you can skip this chapter.
-+
-+6.1. PNG color types
-+--------------------
-+
-+A PNG image can have many color types, ranging from 1-bit color to 64-bit color,
-+as well as palettized color modes. After the zlib decompression and unfiltering
-+in the PNG image is done, the raw pixel data will have that color type and thus
-+a certain amount of bits per pixel. If you want the output raw image after
-+decoding to have another color type, a conversion is done by LodePNG.
-+
-+The PNG specification gives the following color types:
-+
-+0: greyscale, bit depths 1, 2, 4, 8, 16
-+2: RGB, bit depths 8 and 16
-+3: palette, bit depths 1, 2, 4 and 8
-+4: greyscale with alpha, bit depths 8 and 16
-+6: RGBA, bit depths 8 and 16
-+
-+Bit depth is the amount of bits per pixel per color channel. So the total amount
-+of bits per pixel is: amount of channels * bitdepth.
-+
-+6.2. color conversions
-+----------------------
-+
-+As explained in the sections about the encoder and decoder, you can specify
-+color types and bit depths in info_png and info_raw to change the default
-+behaviour.
-+
-+If, when decoding, you want the raw image to be something else than the default,
-+you need to set the color type and bit depth you want in the LodePNGColorMode,
-+or the parameters colortype and bitdepth of the simple decoding function.
-+
-+If, when encoding, you use another color type than the default in the raw input
-+image, you need to specify its color type and bit depth in the LodePNGColorMode
-+of the raw image, or use the parameters colortype and bitdepth of the simple
-+encoding function.
-+
-+If, when encoding, you don't want LodePNG to choose the output PNG color type
-+but control it yourself, you need to set auto_convert in the encoder settings
-+to false, and specify the color type you want in the LodePNGInfo of the
-+encoder (including palette: it can generate a palette if auto_convert is true,
-+otherwise not).
-+
-+If the input and output color type differ (whether user chosen or auto chosen),
-+LodePNG will do a color conversion, which follows the rules below, and may
-+sometimes result in an error.
-+
-+To avoid some confusion:
-+-the decoder converts from PNG to raw image
-+-the encoder converts from raw image to PNG
-+-the colortype and bitdepth in LodePNGColorMode info_raw, are those of the raw image
-+-the colortype and bitdepth in the color field of LodePNGInfo info_png, are those of the PNG
-+-when encoding, the color type in LodePNGInfo is ignored if auto_convert
-+ is enabled, it is automatically generated instead
-+-when decoding, the color type in LodePNGInfo is set by the decoder to that of the original
-+ PNG image, but it can be ignored since the raw image has the color type you requested instead
-+-if the color type of the LodePNGColorMode and PNG image aren't the same, a conversion
-+ between the color types is done if the color types are supported. If it is not
-+ supported, an error is returned. If the types are the same, no conversion is done.
-+-even though some conversions aren't supported, LodePNG supports loading PNGs from any
-+ colortype and saving PNGs to any colortype, sometimes it just requires preparing
-+ the raw image correctly before encoding.
-+-both encoder and decoder use the same color converter.
-+
-+Non supported color conversions:
-+-color to greyscale: no error is thrown, but the result will look ugly because
-+only the red channel is taken
-+-anything to palette when that palette does not have that color in it: in this
-+case an error is thrown
-+
-+Supported color conversions:
-+-anything to 8-bit RGB, 8-bit RGBA, 16-bit RGB, 16-bit RGBA
-+-any grey or grey+alpha, to grey or grey+alpha
-+-anything to a palette, as long as the palette has the requested colors in it
-+-removing alpha channel
-+-higher to smaller bitdepth, and vice versa
-+
-+If you want no color conversion to be done (e.g. for speed or control):
-+-In the encoder, you can make it save a PNG with any color type by giving the
-+raw color mode and LodePNGInfo the same color mode, and setting auto_convert to
-+false.
-+-In the decoder, you can make it store the pixel data in the same color type
-+as the PNG has, by setting the color_convert setting to false. Settings in
-+info_raw are then ignored.
-+
-+The function lodepng_convert does the color conversion. It is available in the
-+interface but normally isn't needed since the encoder and decoder already call
-+it.
-+
-+6.3. padding bits
-+-----------------
-+
-+In the PNG file format, if a less than 8-bit per pixel color type is used and the scanlines
-+have a bit amount that isn't a multiple of 8, then padding bits are used so that each
-+scanline starts at a fresh byte. But that is NOT true for the LodePNG raw input and output.
-+The raw input image you give to the encoder, and the raw output image you get from the decoder
-+will NOT have these padding bits, e.g. in the case of a 1-bit image with a width
-+of 7 pixels, the first pixel of the second scanline will the the 8th bit of the first byte,
-+not the first bit of a new byte.
-+
-+6.4. A note about 16-bits per channel and endianness
-+----------------------------------------------------
-+
-+LodePNG uses unsigned char arrays for 16-bit per channel colors too, just like
-+for any other color format. The 16-bit values are stored in big endian (most
-+significant byte first) in these arrays. This is the opposite order of the
-+little endian used by x86 CPU's.
-+
-+LodePNG always uses big endian because the PNG file format does so internally.
-+Conversions to other formats than PNG uses internally are not supported by
-+LodePNG on purpose, there are myriads of formats, including endianness of 16-bit
-+colors, the order in which you store R, G, B and A, and so on. Supporting and
-+converting to/from all that is outside the scope of LodePNG.
-+
-+This may mean that, depending on your use case, you may want to convert the big
-+endian output of LodePNG to little endian with a for loop. This is certainly not
-+always needed, many applications and libraries support big endian 16-bit colors
-+anyway, but it means you cannot simply cast the unsigned char* buffer to an
-+unsigned short* buffer on x86 CPUs.
-+
-+
-+7. error values
-+---------------
-+
-+All functions in LodePNG that return an error code, return 0 if everything went
-+OK, or a non-zero code if there was an error.
-+
-+The meaning of the LodePNG error values can be retrieved with the function
-+lodepng_error_text: given the numerical error code, it returns a description
-+of the error in English as a string.
-+
-+Check the implementation of lodepng_error_text to see the meaning of each code.
-+
-+
-+8. chunks and PNG editing
-+-------------------------
-+
-+If you want to add extra chunks to a PNG you encode, or use LodePNG for a PNG
-+editor that should follow the rules about handling of unknown chunks, or if your
-+program is able to read other types of chunks than the ones handled by LodePNG,
-+then that's possible with the chunk functions of LodePNG.
-+
-+A PNG chunk has the following layout:
-+
-+4 bytes length
-+4 bytes type name
-+length bytes data
-+4 bytes CRC
-+
-+8.1. iterating through chunks
-+-----------------------------
-+
-+If you have a buffer containing the PNG image data, then the first chunk (the
-+IHDR chunk) starts at byte number 8 of that buffer. The first 8 bytes are the
-+signature of the PNG and are not part of a chunk. But if you start at byte 8
-+then you have a chunk, and can check the following things of it.
-+
-+NOTE: none of these functions check for memory buffer boundaries. To avoid
-+exploits, always make sure the buffer contains all the data of the chunks.
-+When using lodepng_chunk_next, make sure the returned value is within the
-+allocated memory.
-+
-+unsigned lodepng_chunk_length(const unsigned char* chunk):
-+
-+Get the length of the chunk's data. The total chunk length is this length + 12.
-+
-+void lodepng_chunk_type(char type[5], const unsigned char* chunk):
-+unsigned char lodepng_chunk_type_equals(const unsigned char* chunk, const char* type):
-+
-+Get the type of the chunk or compare if it's a certain type
-+
-+unsigned char lodepng_chunk_critical(const unsigned char* chunk):
-+unsigned char lodepng_chunk_private(const unsigned char* chunk):
-+unsigned char lodepng_chunk_safetocopy(const unsigned char* chunk):
-+
-+Check if the chunk is critical in the PNG standard (only IHDR, PLTE, IDAT and IEND are).
-+Check if the chunk is private (public chunks are part of the standard, private ones not).
-+Check if the chunk is safe to copy. If it's not, then, when modifying data in a critical
-+chunk, unsafe to copy chunks of the old image may NOT be saved in the new one if your
-+program doesn't handle that type of unknown chunk.
-+
-+unsigned char* lodepng_chunk_data(unsigned char* chunk):
-+const unsigned char* lodepng_chunk_data_const(const unsigned char* chunk):
-+
-+Get a pointer to the start of the data of the chunk.
-+
-+unsigned lodepng_chunk_check_crc(const unsigned char* chunk):
-+void lodepng_chunk_generate_crc(unsigned char* chunk):
-+
-+Check if the crc is correct or generate a correct one.
-+
-+unsigned char* lodepng_chunk_next(unsigned char* chunk):
-+const unsigned char* lodepng_chunk_next_const(const unsigned char* chunk):
-+
-+Iterate to the next chunk. This works if you have a buffer with consecutive chunks. Note that these
-+functions do no boundary checking of the allocated data whatsoever, so make sure there is enough
-+data available in the buffer to be able to go to the next chunk.
-+
-+unsigned lodepng_chunk_append(unsigned char** out, size_t* outlength, const unsigned char* chunk):
-+unsigned lodepng_chunk_create(unsigned char** out, size_t* outlength, unsigned length,
-+                              const char* type, const unsigned char* data):
-+
-+These functions are used to create new chunks that are appended to the data in *out that has
-+length *outlength. The append function appends an existing chunk to the new data. The create
-+function creates a new chunk with the given parameters and appends it. Type is the 4-letter
-+name of the chunk.
-+
-+8.2. chunks in info_png
-+-----------------------
-+
-+The LodePNGInfo struct contains fields with the unknown chunk in it. It has 3
-+buffers (each with size) to contain 3 types of unknown chunks:
-+the ones that come before the PLTE chunk, the ones that come between the PLTE
-+and the IDAT chunks, and the ones that come after the IDAT chunks.
-+It's necessary to make the distionction between these 3 cases because the PNG
-+standard forces to keep the ordering of unknown chunks compared to the critical
-+chunks, but does not force any other ordering rules.
-+
-+info_png.unknown_chunks_data[0] is the chunks before PLTE
-+info_png.unknown_chunks_data[1] is the chunks after PLTE, before IDAT
-+info_png.unknown_chunks_data[2] is the chunks after IDAT
-+
-+The chunks in these 3 buffers can be iterated through and read by using the same
-+way described in the previous subchapter.
-+
-+When using the decoder to decode a PNG, you can make it store all unknown chunks
-+if you set the option settings.remember_unknown_chunks to 1. By default, this
-+option is off (0).
-+
-+The encoder will always encode unknown chunks that are stored in the info_png.
-+If you need it to add a particular chunk that isn't known by LodePNG, you can
-+use lodepng_chunk_append or lodepng_chunk_create to the chunk data in
-+info_png.unknown_chunks_data[x].
-+
-+Chunks that are known by LodePNG should not be added in that way. E.g. to make
-+LodePNG add a bKGD chunk, set background_defined to true and add the correct
-+parameters there instead.
-+
-+
-+9. compiler support
-+-------------------
-+
-+No libraries other than the current standard C library are needed to compile
-+LodePNG. For the C++ version, only the standard C++ library is needed on top.
-+Add the files lodepng.c(pp) and lodepng.h to your project, include
-+lodepng.h where needed, and your program can read/write PNG files.
-+
-+It is compatible with C90 and up, and C++03 and up.
-+
-+If performance is important, use optimization when compiling! For both the
-+encoder and decoder, this makes a large difference.
-+
-+Make sure that LodePNG is compiled with the same compiler of the same version
-+and with the same settings as the rest of the program, or the interfaces with
-+std::vectors and std::strings in C++ can be incompatible.
-+
-+CHAR_BITS must be 8 or higher, because LodePNG uses unsigned chars for octets.
-+
-+*) gcc and g++
-+
-+LodePNG is developed in gcc so this compiler is natively supported. It gives no
-+warnings with compiler options "-Wall -Wextra -pedantic -ansi", with gcc and g++
-+version 4.7.1 on Linux, 32-bit and 64-bit.
-+
-+*) Clang
-+
-+Fully supported and warning-free.
-+
-+*) Mingw
-+
-+The Mingw compiler (a port of gcc for Windows) should be fully supported by
-+LodePNG.
-+
-+*) Visual Studio and Visual C++ Express Edition
-+
-+LodePNG should be warning-free with warning level W4. Two warnings were disabled
-+with pragmas though: warning 4244 about implicit conversions, and warning 4996
-+where it wants to use a non-standard function fopen_s instead of the standard C
-+fopen.
-+
-+Visual Studio may want "stdafx.h" files to be included in each source file and
-+give an error "unexpected end of file while looking for precompiled header".
-+This is not standard C++ and will not be added to the stock LodePNG. You can
-+disable it for lodepng.cpp only by right clicking it, Properties, C/C++,
-+Precompiled Headers, and set it to Not Using Precompiled Headers there.
-+
-+NOTE: Modern versions of VS should be fully supported, but old versions, e.g.
-+VS6, are not guaranteed to work.
-+
-+*) Compilers on Macintosh
-+
-+LodePNG has been reported to work both with gcc and LLVM for Macintosh, both for
-+C and C++.
-+
-+*) Other Compilers
-+
-+If you encounter problems on any compilers, feel free to let me know and I may
-+try to fix it if the compiler is modern and standards complient.
-+
-+
-+10. examples
-+------------
-+
-+This decoder example shows the most basic usage of LodePNG. More complex
-+examples can be found on the LodePNG website.
-+
-+10.1. decoder C++ example
-+-------------------------
-+
-+#include "lodepng.h"
-+#include <iostream>
-+
-+int main(int argc, char *argv[])
-+{
-+  const char* filename = argc > 1 ? argv[1] : "test.png";
-+
-+  //load and decode
-+  std::vector<unsigned char> image;
-+  unsigned width, height;
-+  unsigned error = lodepng::decode(image, width, height, filename);
-+
-+  //if there's an error, display it
-+  if(error) std::cout << "decoder error " << error << ": " << lodepng_error_text(error) << std::endl;
-+
-+  //the pixels are now in the vector "image", 4 bytes per pixel, ordered RGBARGBA..., use it as texture, draw it, ...
-+}
-+
-+10.2. decoder C example
-+-----------------------
-+
-+#include "lodepng.h"
-+
-+int main(int argc, char *argv[])
-+{
-+  unsigned error;
-+  unsigned char* image;
-+  size_t width, height;
-+  const char* filename = argc > 1 ? argv[1] : "test.png";
-+
-+  error = lodepng_decode32_file(&image, &width, &height, filename);
-+
-+  if(error) printf("decoder error %u: %s\n", error, lodepng_error_text(error));
-+
-+  / * use image here * /
-+
-+  free(image);
-+  return 0;
-+}
-+
-+11. state settings reference
-+----------------------------
-+
-+A quick reference of some settings to set on the LodePNGState
-+
-+For decoding:
-+
-+state.decoder.zlibsettings.ignore_adler32: ignore ADLER32 checksums
-+state.decoder.zlibsettings.custom_...: use custom inflate function
-+state.decoder.ignore_crc: ignore CRC checksums
-+state.decoder.color_convert: convert internal PNG color to chosen one
-+state.decoder.read_text_chunks: whether to read in text metadata chunks
-+state.decoder.remember_unknown_chunks: whether to read in unknown chunks
-+state.info_raw.colortype: desired color type for decoded image
-+state.info_raw.bitdepth: desired bit depth for decoded image
-+state.info_raw....: more color settings, see struct LodePNGColorMode
-+state.info_png....: no settings for decoder but ouput, see struct LodePNGInfo
-+
-+For encoding:
-+
-+state.encoder.zlibsettings.btype: disable compression by setting it to 0
-+state.encoder.zlibsettings.use_lz77: use LZ77 in compression
-+state.encoder.zlibsettings.windowsize: tweak LZ77 windowsize
-+state.encoder.zlibsettings.minmatch: tweak min LZ77 length to match
-+state.encoder.zlibsettings.nicematch: tweak LZ77 match where to stop searching
-+state.encoder.zlibsettings.lazymatching: try one more LZ77 matching
-+state.encoder.zlibsettings.custom_...: use custom deflate function
-+state.encoder.auto_convert: choose optimal PNG color type, if 0 uses info_png
-+state.encoder.filter_palette_zero: PNG filter strategy for palette
-+state.encoder.filter_strategy: PNG filter strategy to encode with
-+state.encoder.force_palette: add palette even if not encoding to one
-+state.encoder.add_id: add LodePNG identifier and version as a text chunk
-+state.encoder.text_compression: use compressed text chunks for metadata
-+state.info_raw.colortype: color type of raw input image you provide
-+state.info_raw.bitdepth: bit depth of raw input image you provide
-+state.info_raw: more color settings, see struct LodePNGColorMode
-+state.info_png.color.colortype: desired color type if auto_convert is false
-+state.info_png.color.bitdepth: desired bit depth if auto_convert is false
-+state.info_png.color....: more color settings, see struct LodePNGColorMode
-+state.info_png....: more PNG related settings, see struct LodePNGInfo
-+
-+
-+12. changes
-+-----------
-+
-+The version number of LodePNG is the date of the change given in the format
-+yyyymmdd.
-+
-+Some changes aren't backwards compatible. Those are indicated with a (!)
-+symbol.
-+
-+*) 18 apr 2016: Changed qsort to custom stable sort (for platforms w/o qsort).
-+*) 09 apr 2016: Fixed colorkey usage detection, and better file loading (within
-+   the limits of pure C90).
-+*) 08 dec 2015: Made load_file function return error if file can't be opened.
-+*) 24 okt 2015: Bugfix with decoding to palette output.
-+*) 18 apr 2015: Boundary PM instead of just package-merge for faster encoding.
-+*) 23 aug 2014: Reduced needless memory usage of decoder.
-+*) 28 jun 2014: Removed fix_png setting, always support palette OOB for
-+    simplicity. Made ColorProfile public.
-+*) 09 jun 2014: Faster encoder by fixing hash bug and more zeros optimization.
-+*) 22 dec 2013: Power of two windowsize required for optimization.
-+*) 15 apr 2013: Fixed bug with LAC_ALPHA and color key.
-+*) 25 mar 2013: Added an optional feature to ignore some PNG errors (fix_png).
-+*) 11 mar 2013 (!): Bugfix with custom free. Changed from "my" to "lodepng_"
-+    prefix for the custom allocators and made it possible with a new #define to
-+    use custom ones in your project without needing to change lodepng's code.
-+*) 28 jan 2013: Bugfix with color key.
-+*) 27 okt 2012: Tweaks in text chunk keyword length error handling.
-+*) 8 okt 2012 (!): Added new filter strategy (entropy) and new auto color mode.
-+    (no palette). Better deflate tree encoding. New compression tweak settings.
-+    Faster color conversions while decoding. Some internal cleanups.
-+*) 23 sep 2012: Reduced warnings in Visual Studio a little bit.
-+*) 1 sep 2012 (!): Removed #define's for giving custom (de)compression functions
-+    and made it work with function pointers instead.
-+*) 23 jun 2012: Added more filter strategies. Made it easier to use custom alloc
-+    and free functions and toggle #defines from compiler flags. Small fixes.
-+*) 6 may 2012 (!): Made plugging in custom zlib/deflate functions more flexible.
-+*) 22 apr 2012 (!): Made interface more consistent, renaming a lot. Removed
-+    redundant C++ codec classes. Reduced amount of structs. Everything changed,
-+    but it is cleaner now imho and functionality remains the same. Also fixed
-+    several bugs and shrunk the implementation code. Made new samples.
-+*) 6 nov 2011 (!): By default, the encoder now automatically chooses the best
-+    PNG color model and bit depth, based on the amount and type of colors of the
-+    raw image. For this, autoLeaveOutAlphaChannel replaced by auto_choose_color.
-+*) 9 okt 2011: simpler hash chain implementation for the encoder.
-+*) 8 sep 2011: lz77 encoder lazy matching instead of greedy matching.
-+*) 23 aug 2011: tweaked the zlib compression parameters after benchmarking.
-+    A bug with the PNG filtertype heuristic was fixed, so that it chooses much
-+    better ones (it's quite significant). A setting to do an experimental, slow,
-+    brute force search for PNG filter types is added.
-+*) 17 aug 2011 (!): changed some C zlib related function names.
-+*) 16 aug 2011: made the code less wide (max 120 characters per line).
-+*) 17 apr 2011: code cleanup. Bugfixes. Convert low to 16-bit per sample colors.
-+*) 21 feb 2011: fixed compiling for C90. Fixed compiling with sections disabled.
-+*) 11 dec 2010: encoding is made faster, based on suggestion by Peter Eastman
-+    to optimize long sequences of zeros.
-+*) 13 nov 2010: added LodePNG_InfoColor_hasPaletteAlpha and
-+    LodePNG_InfoColor_canHaveAlpha functions for convenience.
-+*) 7 nov 2010: added LodePNG_error_text function to get error code description.
-+*) 30 okt 2010: made decoding slightly faster
-+*) 26 okt 2010: (!) changed some C function and struct names (more consistent).
-+     Reorganized the documentation and the declaration order in the header.
-+*) 08 aug 2010: only changed some comments and external samples.
-+*) 05 jul 2010: fixed bug thanks to warnings in the new gcc version.
-+*) 14 mar 2010: fixed bug where too much memory was allocated for char buffers.
-+*) 02 sep 2008: fixed bug where it could create empty tree that linux apps could
-+    read by ignoring the problem but windows apps couldn't.
-+*) 06 jun 2008: added more error checks for out of memory cases.
-+*) 26 apr 2008: added a few more checks here and there to ensure more safety.
-+*) 06 mar 2008: crash with encoding of strings fixed
-+*) 02 feb 2008: support for international text chunks added (iTXt)
-+*) 23 jan 2008: small cleanups, and #defines to divide code in sections
-+*) 20 jan 2008: support for unknown chunks allowing using LodePNG for an editor.
-+*) 18 jan 2008: support for tIME and pHYs chunks added to encoder and decoder.
-+*) 17 jan 2008: ability to encode and decode compressed zTXt chunks added
-+    Also various fixes, such as in the deflate and the padding bits code.
-+*) 13 jan 2008: Added ability to encode Adam7-interlaced images. Improved
-+    filtering code of encoder.
-+*) 07 jan 2008: (!) changed LodePNG to use ISO C90 instead of C++. A
-+    C++ wrapper around this provides an interface almost identical to before.
-+    Having LodePNG be pure ISO C90 makes it more portable. The C and C++ code
-+    are together in these files but it works both for C and C++ compilers.
-+*) 29 dec 2007: (!) changed most integer types to unsigned int + other tweaks
-+*) 30 aug 2007: bug fixed which makes this Borland C++ compatible
-+*) 09 aug 2007: some VS2005 warnings removed again
-+*) 21 jul 2007: deflate code placed in new namespace separate from zlib code
-+*) 08 jun 2007: fixed bug with 2- and 4-bit color, and small interlaced images
-+*) 04 jun 2007: improved support for Visual Studio 2005: crash with accessing
-+    invalid std::vector element [0] fixed, and level 3 and 4 warnings removed
-+*) 02 jun 2007: made the encoder add a tag with version by default
-+*) 27 may 2007: zlib and png code separated (but still in the same file),
-+    simple encoder/decoder functions added for more simple usage cases
-+*) 19 may 2007: minor fixes, some code cleaning, new error added (error 69),
-+    moved some examples from here to lodepng_examples.cpp
-+*) 12 may 2007: palette decoding bug fixed
-+*) 24 apr 2007: changed the license from BSD to the zlib license
-+*) 11 mar 2007: very simple addition: ability to encode bKGD chunks.
-+*) 04 mar 2007: (!) tEXt chunk related fixes, and support for encoding
-+    palettized PNG images. Plus little interface change with palette and texts.
-+*) 03 mar 2007: Made it encode dynamic Huffman shorter with repeat codes.
-+    Fixed a bug where the end code of a block had length 0 in the Huffman tree.
-+*) 26 feb 2007: Huffman compression with dynamic trees (BTYPE 2) now implemented
-+    and supported by the encoder, resulting in smaller PNGs at the output.
-+*) 27 jan 2007: Made the Adler-32 test faster so that a timewaste is gone.
-+*) 24 jan 2007: gave encoder an error interface. Added color conversion from any
-+    greyscale type to 8-bit greyscale with or without alpha.
-+*) 21 jan 2007: (!) Totally changed the interface. It allows more color types
-+    to convert to and is more uniform. See the manual for how it works now.
-+*) 07 jan 2007: Some cleanup & fixes, and a few changes over the last days:
-+    encode/decode custom tEXt chunks, separate classes for zlib & deflate, and
-+    at last made the decoder give errors for incorrect Adler32 or Crc.
-+*) 01 jan 2007: Fixed bug with encoding PNGs with less than 8 bits per channel.
-+*) 29 dec 2006: Added support for encoding images without alpha channel, and
-+    cleaned out code as well as making certain parts faster.
-+*) 28 dec 2006: Added "Settings" to the encoder.
-+*) 26 dec 2006: The encoder now does LZ77 encoding and produces much smaller files now.
-+    Removed some code duplication in the decoder. Fixed little bug in an example.
-+*) 09 dec 2006: (!) Placed output parameters of public functions as first parameter.
-+    Fixed a bug of the decoder with 16-bit per color.
-+*) 15 okt 2006: Changed documentation structure
-+*) 09 okt 2006: Encoder class added. It encodes a valid PNG image from the
-+    given image buffer, however for now it's not compressed.
-+*) 08 sep 2006: (!) Changed to interface with a Decoder class
-+*) 30 jul 2006: (!) LodePNG_InfoPng , width and height are now retrieved in different
-+    way. Renamed decodePNG to decodePNGGeneric.
-+*) 29 jul 2006: (!) Changed the interface: image info is now returned as a
-+    struct of type LodePNG::LodePNG_Info, instead of a vector, which was a bit clumsy.
-+*) 28 jul 2006: Cleaned the code and added new error checks.
-+    Corrected terminology "deflate" into "inflate".
-+*) 23 jun 2006: Added SDL example in the documentation in the header, this
-+    example allows easy debugging by displaying the PNG and its transparency.
-+*) 22 jun 2006: (!) Changed way to obtain error value. Added
-+    loadFile function for convenience. Made decodePNG32 faster.
-+*) 21 jun 2006: (!) Changed type of info vector to unsigned.
-+    Changed position of palette in info vector. Fixed an important bug that
-+    happened on PNGs with an uncompressed block.
-+*) 16 jun 2006: Internally changed unsigned into unsigned where
-+    needed, and performed some optimizations.
-+*) 07 jun 2006: (!) Renamed functions to decodePNG and placed them
-+    in LodePNG namespace. Changed the order of the parameters. Rewrote the
-+    documentation in the header. Renamed files to lodepng.cpp and lodepng.h
-+*) 22 apr 2006: Optimized and improved some code
-+*) 07 sep 2005: (!) Changed to std::vector interface
-+*) 12 aug 2005: Initial release (C++, decoder only)
-+
-+
-+13. contact information
-+-----------------------
-+
-+Feel free to contact me with suggestions, problems, comments, ... concerning
-+LodePNG. If you encounter a PNG image that doesn't work properly with this
-+decoder, feel free to send it and I'll use it to find and fix the problem.
-+
-+My email address is (puzzle the account and domain together with an @ symbol):
-+Domain: gmail dot com.
-+Account: lode dot vandevenne.
-+
-+
-+Copyright (c) 2005-2016 Lode Vandevenne
-+*/
diff --git a/graphics/openfx-arena/files/patch-Extra_ReadPDF.cpp b/graphics/openfx-arena/files/patch-Extra_ReadPDF.cpp
deleted file mode 100644
index 7213735c54d8..000000000000
--- a/graphics/openfx-arena/files/patch-Extra_ReadPDF.cpp
+++ /dev/null
@@ -1,13 +0,0 @@
-Fix build with poppler 0.83
-
---- Extra/ReadPDF.cpp.orig	2020-01-18 15:54:18 UTC
-+++ Extra/ReadPDF.cpp
-@@ -134,7 +134,7 @@ false
-     if (!popplerData.empty()) {
-         struct stat sb;
-         if (stat(popplerData.c_str(), &sb) == 0 && S_ISDIR(sb.st_mode)) {
--            globalParams = new GlobalParams(popplerData.c_str());
-+            globalParams = std::unique_ptr<GlobalParams>(new GlobalParams(popplerData.c_str()));
-         }
-     }
- }
diff --git a/graphics/openfx-arena/files/patch-Makefile.master b/graphics/openfx-arena/files/patch-Makefile.master
deleted file mode 100644
index 8235d0d45251..000000000000
--- a/graphics/openfx-arena/files/patch-Makefile.master
+++ /dev/null
@@ -1,10 +0,0 @@
---- Makefile.master.orig	2017-01-03 14:53:38 UTC
-+++ Makefile.master
-@@ -3,6 +3,7 @@ PATHTOROOT = $(SRCDIR)/OpenFX/Support
- include $(PATHTOROOT)/Plugins/Makefile.master
- 
- CXXFLAGS += -DOFX_EXTENSIONS_VEGAS -DOFX_EXTENSIONS_NUKE -DOFX_EXTENSIONS_TUTTLE -DOFX_EXTENSIONS_NATRON -DOFX_SUPPORTS_OPENGLRENDER -I$(SRCDIR)/SupportExt
-+CXXFLAGS += -I$(SRCDIR)/OpenFX-IO/openfx/Support/include
- VPATH += $(SRCDIR)/SupportExt
- 
- # ImageMagick
diff --git a/graphics/openfx-arena/pkg-plist b/graphics/openfx-arena/pkg-plist
index debb752a491b..c00a85c12f8d 100644
--- a/graphics/openfx-arena/pkg-plist
+++ b/graphics/openfx-arena/pkg-plist
@@ -21,6 +21,8 @@ OFX/Plugins/Arena.ofx.bundle/Contents/Resources/net.fxarena.openfx.Implode.png
 OFX/Plugins/Arena.ofx.bundle/Contents/Resources/net.fxarena.openfx.Implode.svg
 OFX/Plugins/Arena.ofx.bundle/Contents/Resources/net.fxarena.openfx.Modulate.png
 OFX/Plugins/Arena.ofx.bundle/Contents/Resources/net.fxarena.openfx.Modulate.svg
+OFX/Plugins/Arena.ofx.bundle/Contents/Resources/net.fxarena.openfx.Morphology.png
+OFX/Plugins/Arena.ofx.bundle/Contents/Resources/net.fxarena.openfx.Morphology.svg
 OFX/Plugins/Arena.ofx.bundle/Contents/Resources/net.fxarena.openfx.Oilpaint.png
 OFX/Plugins/Arena.ofx.bundle/Contents/Resources/net.fxarena.openfx.Oilpaint.svg
 OFX/Plugins/Arena.ofx.bundle/Contents/Resources/net.fxarena.openfx.Polar.png