aboutsummaryrefslogtreecommitdiff
path: root/contrib/groff/src/devices/xditview/draw.c
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/groff/src/devices/xditview/draw.c')
-rw-r--r--contrib/groff/src/devices/xditview/draw.c699
1 files changed, 0 insertions, 699 deletions
diff --git a/contrib/groff/src/devices/xditview/draw.c b/contrib/groff/src/devices/xditview/draw.c
deleted file mode 100644
index a808abafbb02..000000000000
--- a/contrib/groff/src/devices/xditview/draw.c
+++ /dev/null
@@ -1,699 +0,0 @@
-/*
- * draw.c
- *
- * accept dvi function calls and translate to X
- */
-
-#include <X11/Xos.h>
-#include <X11/IntrinsicP.h>
-#include <X11/StringDefs.h>
-#include <stdio.h>
-#include <ctype.h>
-#include <math.h>
-
-/* math.h on a Sequent doesn't define M_PI, apparently */
-#ifndef M_PI
-#define M_PI 3.14159265358979323846
-#endif
-
-#include "DviP.h"
-
-#define DeviceToX(dw, n) ((int)((n) * (dw)->dvi.scale_factor + .5))
-#define XPos(dw) (DeviceToX((dw), (dw)->dvi.state->x - \
- (dw)->dvi.text_device_width) + (dw)->dvi.text_x_width)
-#define YPos(dw) (DeviceToX((dw), (dw)->dvi.state->y))
-
-static int FakeCharacter(DviWidget, char *, int);
-
-/* font.c */
-extern int MaxFontPosition(DviWidget);
-
-void
-HorizontalMove(DviWidget dw, int delta)
-{
- dw->dvi.state->x += delta;
-}
-
-void
-HorizontalGoto(DviWidget dw, int NewPosition)
-{
- dw->dvi.state->x = NewPosition;
-}
-
-void
-VerticalMove(DviWidget dw, int delta)
-{
- dw->dvi.state->y += delta;
-}
-
-void
-VerticalGoto(DviWidget dw, int NewPosition)
-{
- dw->dvi.state->y = NewPosition;
-}
-
-void
-AdjustCacheDeltas (DviWidget dw)
-{
- int extra;
- int nadj;
- int i;
-
- nadj = 0;
- extra = DeviceToX(dw, dw->dvi.text_device_width)
- - dw->dvi.text_x_width;
- if (extra == 0)
- return;
- for (i = 0; i <= dw->dvi.cache.index; i++)
- if (dw->dvi.cache.adjustable[i])
- ++nadj;
- dw->dvi.text_x_width += extra;
- if (nadj <= 1)
- return;
- for (i = 0; i <= dw->dvi.cache.index; i++)
- if (dw->dvi.cache.adjustable[i]) {
- int x;
- int *deltap;
-
- x = extra/nadj;
- deltap = &dw->dvi.cache.cache[i].delta;
-#define MIN_DELTA 2
- if (*deltap > 0 && x + *deltap < MIN_DELTA) {
- x = MIN_DELTA - *deltap;
- if (x <= 0)
- *deltap = MIN_DELTA;
- else
- x = 0;
- }
- else
- *deltap += x;
- extra -= x;
- --nadj;
- dw->dvi.cache.adjustable[i] = 0;
- }
-}
-
-void
-FlushCharCache (DviWidget dw)
-{
- if (dw->dvi.cache.char_index != 0) {
- AdjustCacheDeltas (dw);
- XDrawText (XtDisplay (dw), XtWindow (dw), dw->dvi.normal_GC,
- dw->dvi.cache.start_x, dw->dvi.cache.start_y,
- dw->dvi.cache.cache, dw->dvi.cache.index + 1);
- }
- dw->dvi.cache.index = 0;
- dw->dvi.cache.max = DVI_TEXT_CACHE_SIZE;
-#if 0
- if (dw->dvi.noPolyText)
- dw->dvi.cache.max = 1;
-#endif
- dw->dvi.cache.char_index = 0;
- dw->dvi.cache.cache[0].nchars = 0;
- dw->dvi.cache.start_x = dw->dvi.cache.x = XPos (dw);
- dw->dvi.cache.start_y = dw->dvi.cache.y = YPos (dw);
-}
-
-void
-Newline (DviWidget dw)
-{
- FlushCharCache (dw);
- dw->dvi.text_x_width = dw->dvi.text_device_width = 0;
- dw->dvi.word_flag = 0;
-}
-
-void
-Word (DviWidget dw)
-{
- dw->dvi.word_flag = 1;
-}
-
-#define charWidth(fi,c) (\
- (fi)->per_char ?\
- (fi)->per_char[(c) - (fi)->min_char_or_byte2].width\
- :\
- (fi)->max_bounds.width\
-)
-
-
-static
-int charExists (XFontStruct *fi, int c)
-{
- XCharStruct *p;
-
- /* `c' is always >= 0 */
- if (fi->per_char == NULL
- || (unsigned int)c < fi->min_char_or_byte2
- || (unsigned int)c > fi->max_char_or_byte2)
- return 0;
- p = fi->per_char + (c - fi->min_char_or_byte2);
- return (p->lbearing != 0 || p->rbearing != 0 || p->width != 0
- || p->ascent != 0 || p->descent != 0 || p->attributes != 0);
-}
-
-/* `wid' is in device units */
-static void
-DoCharacter (DviWidget dw, int c, int wid)
-{
- register XFontStruct *font;
- register XTextItem *text;
- int x, y;
-
- x = XPos(dw);
- y = YPos(dw);
-
- /*
- * quick and dirty extents calculation:
- */
- if (!(y + 24 >= dw->dvi.extents.y1
- && y - 24 <= dw->dvi.extents.y2
-#if 0
- && x + 24 >= dw->dvi.extents.x1
- && x - 24 <= dw->dvi.extents.x2
-#endif
- ))
- return;
-
- if (y != dw->dvi.cache.y
- || dw->dvi.cache.char_index >= DVI_CHAR_CACHE_SIZE) {
- FlushCharCache (dw);
- x = dw->dvi.cache.x;
- dw->dvi.cache.adjustable[dw->dvi.cache.index] = 0;
- }
- /*
- * load a new font, if the current block is not empty,
- * step to the next.
- */
- if (dw->dvi.cache.font_size != dw->dvi.state->font_size ||
- dw->dvi.cache.font_number != dw->dvi.state->font_number)
- {
- FlushCharCache (dw);
- x = dw->dvi.cache.x;
- dw->dvi.cache.font_size = dw->dvi.state->font_size;
- dw->dvi.cache.font_number = dw->dvi.state->font_number;
- dw->dvi.cache.font = QueryFont (dw,
- dw->dvi.cache.font_number,
- dw->dvi.cache.font_size);
- if (dw->dvi.cache.cache[dw->dvi.cache.index].nchars != 0) {
- ++dw->dvi.cache.index;
- if (dw->dvi.cache.index >= dw->dvi.cache.max)
- FlushCharCache (dw);
- dw->dvi.cache.cache[dw->dvi.cache.index].nchars = 0;
- dw->dvi.cache.adjustable[dw->dvi.cache.index] = 0;
- }
- }
- if (x != dw->dvi.cache.x || dw->dvi.word_flag) {
- if (dw->dvi.cache.cache[dw->dvi.cache.index].nchars != 0) {
- ++dw->dvi.cache.index;
- if (dw->dvi.cache.index >= dw->dvi.cache.max)
- FlushCharCache (dw);
- dw->dvi.cache.cache[dw->dvi.cache.index].nchars = 0;
- dw->dvi.cache.adjustable[dw->dvi.cache.index] = 0;
- }
- dw->dvi.cache.adjustable[dw->dvi.cache.index]
- = dw->dvi.word_flag;
- dw->dvi.word_flag = 0;
- }
- font = dw->dvi.cache.font;
- text = &dw->dvi.cache.cache[dw->dvi.cache.index];
- if (text->nchars == 0) {
- text->chars = &dw->dvi.cache.char_cache[dw->dvi.cache.char_index];
- text->delta = x - dw->dvi.cache.x;
- if (font != dw->dvi.font) {
- text->font = font->fid;
- dw->dvi.font = font;
- } else
- text->font = None;
- dw->dvi.cache.x += text->delta;
- }
- if (charExists(font, c)) {
- int w;
- dw->dvi.cache.char_cache[dw->dvi.cache.char_index++] = (char) c;
- ++text->nchars;
- w = charWidth(font, c);
- dw->dvi.cache.x += w;
- if (wid != 0) {
- dw->dvi.text_x_width += w;
- dw->dvi.text_device_width += wid;
- }
- }
-}
-
-static
-int FindCharWidth (DviWidget dw, char *buf, int *widp)
-{
- int maxpos;
- int i;
-
- if (dw->dvi.device_font == 0
- || dw->dvi.state->font_number != dw->dvi.device_font_number) {
- dw->dvi.device_font_number = dw->dvi.state->font_number;
- dw->dvi.device_font
- = QueryDeviceFont (dw, dw->dvi.device_font_number);
- }
- if (dw->dvi.device_font
- && device_char_width (dw->dvi.device_font,
- dw->dvi.state->font_size, buf, widp))
- return 1;
-
- maxpos = MaxFontPosition (dw);
- for (i = 1; i <= maxpos; i++) {
- DeviceFont *f = QueryDeviceFont (dw, i);
- if (f && device_font_special (f)
- && device_char_width (f, dw->dvi.state->font_size,
- buf, widp)) {
- dw->dvi.state->font_number = i;
- return 1;
- }
- }
- return 0;
-}
-
-/* Return the width of the character in device units. */
-
-int PutCharacter (DviWidget dw, char *buf)
-{
- int prevFont;
- int c = -1;
- int wid = 0;
- DviCharNameMap *map;
-
- if (!dw->dvi.display_enable)
- return 0; /* The width doesn't matter in this case. */
- prevFont = dw->dvi.state->font_number;
- if (!FindCharWidth (dw, buf, &wid))
- return 0;
- map = QueryFontMap (dw, dw->dvi.state->font_number);
- if (map)
- c = DviCharIndex (map, buf);
- if (c >= 0)
- DoCharacter (dw, c, wid);
- else
- (void) FakeCharacter (dw, buf, wid);
- dw->dvi.state->font_number = prevFont;
- return wid;
-}
-
-/* Return 1 if we can fake it; 0 otherwise. */
-
-static
-int FakeCharacter (DviWidget dw, char *buf, int wid)
-{
- int oldx, oldw;
- char ch[2];
- const char *chars = 0;
-
- if (buf[0] == '\0' || buf[1] == '\0' || buf[2] != '\0')
- return 0;
-#define pack2(c1, c2) (((c1) << 8) | (c2))
-
- switch (pack2(buf[0], buf[1])) {
- case pack2('f', 'i'):
- chars = "fi";
- break;
- case pack2('f', 'l'):
- chars = "fl";
- break;
- case pack2('f', 'f'):
- chars = "ff";
- break;
- case pack2('F', 'i'):
- chars = "ffi";
- break;
- case pack2('F', 'l'):
- chars = "ffl";
- break;
- }
- if (!chars)
- return 0;
- oldx = dw->dvi.state->x;
- oldw = dw->dvi.text_device_width;
- ch[1] = '\0';
- for (; *chars; chars++) {
- ch[0] = *chars;
- dw->dvi.state->x += PutCharacter (dw, ch);
- }
- dw->dvi.state->x = oldx;
- dw->dvi.text_device_width = oldw + wid;
- return 1;
-}
-
-void
-PutNumberedCharacter (DviWidget dw, int c)
-{
- char *name;
- int wid;
- DviCharNameMap *map;
-
- if (!dw->dvi.display_enable)
- return;
-
- if (dw->dvi.device_font == 0
- || dw->dvi.state->font_number != dw->dvi.device_font_number) {
- dw->dvi.device_font_number = dw->dvi.state->font_number;
- dw->dvi.device_font
- = QueryDeviceFont (dw, dw->dvi.device_font_number);
- }
-
- if (dw->dvi.device_font == 0
- || !device_code_width (dw->dvi.device_font,
- dw->dvi.state->font_size, c, &wid))
- return;
- if (dw->dvi.native) {
- DoCharacter (dw, c, wid);
- return;
- }
- map = QueryFontMap (dw, dw->dvi.state->font_number);
- if (!map)
- return;
- for (name = device_name_for_code (dw->dvi.device_font, c);
- name;
- name = device_name_for_code ((DeviceFont *)0, c)) {
- int code = DviCharIndex (map, name);
- if (code >= 0) {
- DoCharacter (dw, code, wid);
- break;
- }
- if (FakeCharacter (dw, name, wid))
- break;
- }
-}
-
-void
-ClearPage (DviWidget dw)
-{
- XClearWindow (XtDisplay (dw), XtWindow (dw));
-}
-
-static void
-setGC (DviWidget dw)
-{
- int desired_line_width;
-
- if (dw->dvi.line_thickness < 0)
- desired_line_width = (int)(((double)dw->dvi.device_resolution
- * dw->dvi.state->font_size)
- / (10.0*72.0*dw->dvi.sizescale));
- else
- desired_line_width = dw->dvi.line_thickness;
-
- if (desired_line_width != dw->dvi.line_width) {
- XGCValues values;
- values.line_width = DeviceToX(dw, desired_line_width);
- if (values.line_width == 0)
- values.line_width = 1;
- XChangeGC(XtDisplay (dw), dw->dvi.normal_GC,
- GCLineWidth, &values);
- dw->dvi.line_width = desired_line_width;
- }
-}
-
-static void
-setFillGC (DviWidget dw)
-{
- int fill_type;
- unsigned long mask = GCFillStyle | GCForeground;
-
- fill_type = (dw->dvi.fill * 10) / (DVI_FILL_MAX + 1);
- if (dw->dvi.fill_type != fill_type) {
- XGCValues values;
- if (fill_type <= 0) {
- values.foreground = dw->dvi.background;
- values.fill_style = FillSolid;
- } else if (fill_type >= 9) {
- values.foreground = dw->dvi.foreground;
- values.fill_style = FillSolid;
- } else {
- values.foreground = dw->dvi.foreground;
- values.fill_style = FillOpaqueStippled;
- values.stipple = dw->dvi.gray[fill_type - 1];
- mask |= GCStipple;
- }
- XChangeGC(XtDisplay (dw), dw->dvi.fill_GC, mask, &values);
- dw->dvi.fill_type = fill_type;
- }
-}
-
-void
-DrawLine (DviWidget dw, int x, int y)
-{
- int xp, yp;
-
- AdjustCacheDeltas (dw);
- setGC (dw);
- xp = XPos (dw);
- yp = YPos (dw);
- XDrawLine (XtDisplay (dw), XtWindow (dw), dw->dvi.normal_GC,
- xp, yp,
- xp + DeviceToX (dw, x), yp + DeviceToX (dw, y));
-}
-
-void
-DrawCircle (DviWidget dw, int diam)
-{
- int d;
-
- AdjustCacheDeltas (dw);
- setGC (dw);
- d = DeviceToX (dw, diam);
- XDrawArc (XtDisplay (dw), XtWindow (dw), dw->dvi.normal_GC,
- XPos (dw), YPos (dw) - d/2,
- d, d, 0, 64*360);
-}
-
-void
-DrawFilledCircle (DviWidget dw, int diam)
-{
- int d;
-
- AdjustCacheDeltas (dw);
- setFillGC (dw);
- d = DeviceToX (dw, diam);
- XFillArc (XtDisplay (dw), XtWindow (dw), dw->dvi.fill_GC,
- XPos (dw), YPos (dw) - d/2,
- d, d, 0, 64*360);
- XDrawArc (XtDisplay (dw), XtWindow (dw), dw->dvi.fill_GC,
- XPos (dw), YPos (dw) - d/2,
- d, d, 0, 64*360);
-}
-
-void
-DrawEllipse (DviWidget dw, int a, int b)
-{
- AdjustCacheDeltas (dw);
- setGC (dw);
- XDrawArc (XtDisplay (dw), XtWindow (dw), dw->dvi.normal_GC,
- XPos (dw), YPos (dw) - DeviceToX (dw, b/2),
- DeviceToX (dw, a), DeviceToX (dw, b), 0, 64*360);
-}
-
-void
-DrawFilledEllipse (DviWidget dw, int a, int b)
-{
- AdjustCacheDeltas (dw);
- setFillGC (dw);
- XFillArc (XtDisplay (dw), XtWindow (dw), dw->dvi.fill_GC,
- XPos (dw), YPos (dw) - DeviceToX (dw, b/2),
- DeviceToX (dw, a), DeviceToX (dw, b), 0, 64*360);
- XDrawArc (XtDisplay (dw), XtWindow (dw), dw->dvi.fill_GC,
- XPos (dw), YPos (dw) - DeviceToX (dw, b/2),
- DeviceToX (dw, a), DeviceToX (dw, b), 0, 64*360);
-}
-
-void
-DrawArc (DviWidget dw, int x_0, int y_0, int x_1, int y_1)
-{
- int angle1, angle2;
- int rad = (int)((sqrt ((double)x_0*x_0 + (double)y_0*y_0)
- + sqrt ((double)x_1*x_1 + (double)y_1*y_1)
- + 1.0)/2.0);
- if ((x_0 == 0 && y_0 == 0) || (x_1 == 0 && y_1 == 0))
- return;
- angle1 = (int)(atan2 ((double)y_0, (double)-x_0)*180.0*64.0/M_PI);
- angle2 = (int)(atan2 ((double)-y_1, (double)x_1)*180.0*64.0/M_PI);
-
- angle2 -= angle1;
- if (angle2 < 0)
- angle2 += 64*360;
-
- AdjustCacheDeltas (dw);
- setGC (dw);
-
- rad = DeviceToX (dw, rad);
- XDrawArc (XtDisplay (dw), XtWindow (dw), dw->dvi.normal_GC,
- XPos (dw) + DeviceToX (dw, x_0) - rad,
- YPos (dw) + DeviceToX (dw, y_0) - rad,
- rad*2, rad*2, angle1, angle2);
-}
-
-void
-DrawPolygon (DviWidget dw, int *v, int n)
-{
- XPoint *p;
- int i;
- int dx, dy;
-
- n /= 2;
-
- AdjustCacheDeltas (dw);
- setGC (dw);
- p = (XPoint *)XtMalloc((n + 2)*sizeof(XPoint));
- p[0].x = XPos (dw);
- p[0].y = YPos (dw);
- dx = 0;
- dy = 0;
- for (i = 0; i < n; i++) {
- dx += v[2*i];
- p[i + 1].x = DeviceToX (dw, dx) + p[0].x;
- dy += v[2*i + 1];
- p[i + 1].y = DeviceToX (dw, dy) + p[0].y;
- }
- p[n+1].x = p[0].x;
- p[n+1].y = p[0].y;
- XDrawLines (XtDisplay (dw), XtWindow (dw), dw->dvi.normal_GC,
- p, n + 2, CoordModeOrigin);
- XtFree((char *)p);
-}
-
-void
-DrawFilledPolygon (DviWidget dw, int *v, int n)
-{
- XPoint *p;
- int i;
- int dx, dy;
-
- n /= 2;
- if (n < 2)
- return;
-
- AdjustCacheDeltas (dw);
- setFillGC (dw);
- p = (XPoint *)XtMalloc((n + 2)*sizeof(XPoint));
- p[0].x = p[n+1].x = XPos (dw);
- p[0].y = p[n+1].y = YPos (dw);
- dx = 0;
- dy = 0;
- for (i = 0; i < n; i++) {
- dx += v[2*i];
- p[i + 1].x = DeviceToX (dw, dx) + p[0].x;
- dy += v[2*i + 1];
- p[i + 1].y = DeviceToX (dw, dy) + p[0].y;
- }
- XFillPolygon (XtDisplay (dw), XtWindow (dw), dw->dvi.fill_GC,
- p, n + 1, Complex, CoordModeOrigin);
- XDrawLines (XtDisplay (dw), XtWindow (dw), dw->dvi.fill_GC,
- p, n + 2, CoordModeOrigin);
- XtFree((char *)p);
-}
-
-#define POINTS_MAX 10000
-
-static void
-appendPoint(XPoint *points, int *pointi, int x, int y)
-{
- if (*pointi < POINTS_MAX) {
- points[*pointi].x = x;
- points[*pointi].y = y;
- *pointi += 1;
- }
-}
-
-#define FLATNESS 1
-
-static void
-flattenCurve(XPoint *points, int *pointi,
- int x_2, int y_2, int x_3, int y_3, int x_4, int y_4)
-{
- int x_1, y_1, dx, dy, n1, n2, n;
-
- x_1 = points[*pointi - 1].x;
- y_1 = points[*pointi - 1].y;
-
- dx = x_4 - x_1;
- dy = y_4 - y_1;
-
- n1 = dy*(x_2 - x_1) - dx*(y_2 - y_1);
- n2 = dy*(x_3 - x_1) - dx*(y_3 - y_1);
- if (n1 < 0)
- n1 = -n1;
- if (n2 < 0)
- n2 = -n2;
- n = n1 > n2 ? n1 : n2;
-
- if (n*n / (dy*dy + dx*dx) <= FLATNESS*FLATNESS)
- appendPoint (points, pointi, x_4, y_4);
- else {
- flattenCurve (points, pointi,
- (x_1 + x_2)/2,
- (y_1 + y_2)/2,
- (x_1 + x_2*2 + x_3)/4,
- (y_1 + y_2*2 + y_3)/4,
- (x_1 + 3*x_2 + 3*x_3 + x_4)/8,
- (y_1 + 3*y_2 + 3*y_3 + y_4)/8);
- flattenCurve (points, pointi,
- (x_2 + x_3*2 + x_4)/4,
- (y_2 + y_3*2 + y_4)/4,
- (x_3 + x_4)/2,
- (y_3 + y_4)/2,
- x_4,
- y_4);
- }
-}
-
-void
-DrawSpline (DviWidget dw, int *v, int n)
-{
- int sx, sy, tx, ty;
- int ox, oy, dx, dy;
- int i;
- int pointi;
- XPoint points[POINTS_MAX];
-
- if (n == 0 || (n & 1) != 0)
- return;
- AdjustCacheDeltas (dw);
- setGC (dw);
- ox = XPos (dw);
- oy = YPos (dw);
- dx = v[0];
- dy = v[1];
- sx = ox;
- sy = oy;
- tx = sx + DeviceToX (dw, dx);
- ty = sy + DeviceToX (dw, dy);
-
- pointi = 0;
-
- appendPoint (points, &pointi, sx, sy);
- appendPoint (points, &pointi, (sx + tx)/2, (sy + ty)/2);
-
- for (i = 2; i < n; i += 2) {
- int ux = ox + DeviceToX (dw, dx += v[i]);
- int uy = oy + DeviceToX (dw, dy += v[i+1]);
- flattenCurve (points, &pointi,
- (sx + tx*5)/6, (sy + ty*5)/6,
- (tx*5 + ux)/6, (ty*5 + uy)/6,
- (tx + ux)/2, (ty + uy)/2);
- sx = tx;
- sy = ty;
- tx = ux;
- ty = uy;
- }
-
- appendPoint (points, &pointi, tx, ty);
-
- XDrawLines (XtDisplay (dw), XtWindow (dw), dw->dvi.normal_GC,
- points, pointi, CoordModeOrigin);
-}
-
-
-/*
-Local Variables:
-c-indent-level: 8
-c-continued-statement-offset: 8
-c-brace-offset: -8
-c-argdecl-indent: 8
-c-label-offset: -8
-c-tab-always-indent: nil
-End:
-*/
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-27 03:27:14 +0000