diff options
Diffstat (limited to 'contrib/ncurses/ncurses/base/lib_color.c')
-rw-r--r-- | contrib/ncurses/ncurses/base/lib_color.c | 429 |
1 files changed, 429 insertions, 0 deletions
diff --git a/contrib/ncurses/ncurses/base/lib_color.c b/contrib/ncurses/ncurses/base/lib_color.c new file mode 100644 index 000000000000..cdc943adc6ee --- /dev/null +++ b/contrib/ncurses/ncurses/base/lib_color.c @@ -0,0 +1,429 @@ +/**************************************************************************** + * Copyright (c) 1998 Free Software Foundation, Inc. * + * * + * Permission is hereby granted, free of charge, to any person obtaining a * + * copy of this software and associated documentation files (the * + * "Software"), to deal in the Software without restriction, including * + * without limitation the rights to use, copy, modify, merge, publish, * + * distribute, distribute with modifications, sublicense, and/or sell * + * copies of the Software, and to permit persons to whom the Software is * + * furnished to do so, subject to the following conditions: * + * * + * The above copyright notice and this permission notice shall be included * + * in all copies or substantial portions of the Software. * + * * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * + * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * + * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * + * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * + * * + * Except as contained in this notice, the name(s) of the above copyright * + * holders shall not be used in advertising or otherwise to promote the * + * sale, use or other dealings in this Software without prior written * + * authorization. * + ****************************************************************************/ + +/**************************************************************************** + * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * + * and: Eric S. Raymond <esr@snark.thyrsus.com> * + ****************************************************************************/ + +/* lib_color.c + * + * Handles color emulation of SYS V curses + * + */ + +#include <curses.priv.h> + +#include <term.h> + +MODULE_ID("$Id: lib_color.c,v 1.35 1999/03/15 01:45:14 Alexander.V.Lukyanov Exp $") + +/* + * These should be screen structure members. They need to be globals for + * hystorical reasons. So we assign them in start_color() and also in + * set_term()'s screen-switching logic. + */ +int COLOR_PAIRS; +int COLORS; + +/* + * Given a RGB range of 0..1000, we'll normally set the individual values + * to about 2/3 of the maximum, leaving full-range for bold/bright colors. + */ +#define RGB_ON 680 +#define RGB_OFF 0 + +static const color_t cga_palette[] = +{ + /* R G B */ + {RGB_OFF, RGB_OFF, RGB_OFF}, /* COLOR_BLACK */ + {RGB_ON, RGB_OFF, RGB_OFF}, /* COLOR_RED */ + {RGB_OFF, RGB_ON, RGB_OFF}, /* COLOR_GREEN */ + {RGB_ON, RGB_ON, RGB_OFF}, /* COLOR_YELLOW */ + {RGB_OFF, RGB_OFF, RGB_ON}, /* COLOR_BLUE */ + {RGB_ON, RGB_OFF, RGB_ON}, /* COLOR_MAGENTA */ + {RGB_OFF, RGB_ON, RGB_ON}, /* COLOR_CYAN */ + {RGB_ON, RGB_ON, RGB_ON}, /* COLOR_WHITE */ +}; +static const color_t hls_palette[] = +{ + /* H L S */ + {0, 0, 0}, /* COLOR_BLACK */ + {120, 50, 100}, /* COLOR_RED */ + {240, 50, 100}, /* COLOR_GREEN */ + {180, 50, 100}, /* COLOR_YELLOW */ + {330, 50, 100}, /* COLOR_BLUE */ + {60, 50, 100}, /* COLOR_MAGENTA */ + {300, 50, 100}, /* COLOR_CYAN */ + {0, 50, 100}, /* COLOR_WHITE */ +}; + +/* + * SVr4 curses is known to interchange color codes (1,4) and (3,6), possibly + * to maintain compatibility with a pre-ANSI scheme. The same scheme is + * also used in the FreeBSD syscons. + */ +static int toggled_colors(int c) +{ + if (c < 16) { + static const int table[] = + { 0, 4, 2, 6, 1, 5, 3, 7, + 8, 12, 10, 14, 9, 13, 11, 15}; + c = table[c]; + } + return c; +} + +static void set_background_color(int bg, int (*outc)(int)) +{ + if (set_a_background) + { + TPUTS_TRACE("set_a_background"); + tputs(tparm(set_a_background, bg), 1, outc); + } + else + { + TPUTS_TRACE("set_background"); + tputs(tparm(set_background, toggled_colors(bg)), 1, outc); + } +} + +static void set_foreground_color(int fg, int (*outc)(int)) +{ + if (set_a_foreground) + { + TPUTS_TRACE("set_a_foreground"); + tputs(tparm(set_a_foreground, fg), 1, outc); + } + else + { + TPUTS_TRACE("set_foreground"); + tputs(tparm(set_foreground, toggled_colors(fg)), 1, outc); + } +} + +static bool set_original_colors(void) +{ + if (orig_pair != 0) { + TPUTS_TRACE("orig_pair"); + putp(orig_pair); + return TRUE; + } + else if (orig_colors != NULL) + { + TPUTS_TRACE("orig_colors"); + putp(orig_colors); + return TRUE; + } + return FALSE; +} + +int start_color(void) +{ + T((T_CALLED("start_color()"))); + + if (set_original_colors() != TRUE) + { + set_foreground_color(COLOR_WHITE, _nc_outch); + set_background_color(COLOR_BLACK, _nc_outch); + } + + if (max_pairs != -1) + COLOR_PAIRS = SP->_pair_count = max_pairs; + else + returnCode(ERR); + if ((SP->_color_pairs = typeCalloc(unsigned short, max_pairs)) == 0) + returnCode(ERR); + SP->_color_pairs[0] = PAIR_OF(COLOR_WHITE, COLOR_BLACK); + if (max_colors != -1) + COLORS = SP->_color_count = max_colors; + else + returnCode(ERR); + SP->_coloron = 1; + + if ((SP->_color_table = typeMalloc(color_t, COLORS)) == 0) + returnCode(ERR); + if (hue_lightness_saturation) + memcpy(SP->_color_table, hls_palette, sizeof(color_t) * COLORS); + else + memcpy(SP->_color_table, cga_palette, sizeof(color_t) * COLORS); + + T(("started color: COLORS = %d, COLOR_PAIRS = %d", COLORS, COLOR_PAIRS)); + + returnCode(OK); +} + +/* This function was originally written by Daniel Weaver <danw@znyx.com> */ +static void rgb2hls(short r, short g, short b, short *h, short *l, short *s) +/* convert RGB to HLS system */ +{ + short min, max, t; + + if ((min = g < r ? g : r) > b) min = b; + if ((max = g > r ? g : r) < b) max = b; + + /* calculate lightness */ + *l = (min + max) / 20; + + if (min == max) /* black, white and all shades of gray */ + { + *h = 0; + *s = 0; + return; + } + + /* calculate saturation */ + if (*l < 50) + *s = ((max - min) * 100) / (max + min); + else *s = ((max - min) * 100) / (2000 - max - min); + + /* calculate hue */ + if (r == max) + t = 120 + ((g - b) * 60) / (max - min); + else + if (g == max) + t = 240 + ((b - r) * 60) / (max - min); + else + t = 360 + ((r - g) * 60) / (max - min); + + *h = t % 360; +} + +/* + * Extension (1997/1/18) - Allow negative f/b values to set default color + * values. + */ +int init_pair(short pair, short f, short b) +{ + unsigned result; + + T((T_CALLED("init_pair(%d,%d,%d)"), pair, f, b)); + + if ((pair < 1) || (pair >= COLOR_PAIRS)) + returnCode(ERR); + if (SP->_default_color) + { + if (f < 0) + f = C_MASK; + if (b < 0) + b = C_MASK; + if (f >= COLORS && f != C_MASK) + returnCode(ERR); + if (b >= COLORS && b != C_MASK) + returnCode(ERR); + } + else + if ((f < 0) || (f >= COLORS) + || (b < 0) || (b >= COLORS)) + returnCode(ERR); + + /* + * When a pair's content is changed, replace its colors (if pair was + * initialized before a screen update is performed replacing original + * pair colors with the new ones). + */ + result = PAIR_OF(f,b); + if (SP->_color_pairs[pair] != 0 + && SP->_color_pairs[pair] != result) { + int y, x; + attr_t z = COLOR_PAIR(pair); + + for (y = 0; y <= curscr->_maxy; y++) { + struct ldat *ptr = &(curscr->_line[y]); + bool changed = FALSE; + for (x = 0; x <= curscr->_maxx; x++) { + if ((ptr->text[x] & A_COLOR) == z) { + /* Set the old cell to zero to ensure it will be + updated on the next doupdate() */ + ptr->text[x] = 0; + CHANGED_CELL(ptr,x); + changed = TRUE; + } + } + if (changed) + _nc_make_oldhash(y); + } + } + SP->_color_pairs[pair] = result; + + if (initialize_pair) + { + const color_t *tp = hue_lightness_saturation ? hls_palette : cga_palette; + + T(("initializing pair: pair = %d, fg=(%d,%d,%d), bg=(%d,%d,%d)", + pair, + tp[f].red, tp[f].green, tp[f].blue, + tp[b].red, tp[b].green, tp[b].blue)); + + if (initialize_pair) + { + TPUTS_TRACE("initialize_pair"); + putp(tparm(initialize_pair, + pair, + tp[f].red, tp[f].green, tp[f].blue, + tp[b].red, tp[b].green, tp[b].blue)); + } + } + + returnCode(OK); +} + +int init_color(short color, short r, short g, short b) +{ + T((T_CALLED("init_color(%d,%d,%d,%d)"), color, r, g, b)); + + if (initialize_color == NULL) + returnCode(ERR); + + if (color < 0 || color >= COLORS) + returnCode(ERR); + if (r < 0 || r > 1000 || g < 0 || g > 1000 || b < 0 || b > 1000) + returnCode(ERR); + + if (hue_lightness_saturation) + rgb2hls(r, g, b, + &SP->_color_table[color].red, + &SP->_color_table[color].green, + &SP->_color_table[color].blue); + else + { + SP->_color_table[color].red = r; + SP->_color_table[color].green = g; + SP->_color_table[color].blue = b; + } + + if (initialize_color) + { + TPUTS_TRACE("initialize_color"); + putp(tparm(initialize_color, color, r, g, b)); + } + returnCode(OK); +} + +bool can_change_color(void) +{ + T((T_CALLED("can_change_color()"))); + returnCode ((can_change != 0) ? TRUE : FALSE); +} + +bool has_colors(void) +{ + T((T_CALLED("has_colors()"))); + returnCode (((max_colors != -1) && (max_pairs != -1) + && (((set_foreground != NULL) + && (set_background != NULL)) + || ((set_a_foreground != NULL) + && (set_a_background != NULL)) + || set_color_pair)) ? TRUE : FALSE); +} + +int color_content(short color, short *r, short *g, short *b) +{ + T((T_CALLED("color_content(%d,%p,%p,%p)"), color, r, g, b)); + if (color < 0 || color > COLORS) + returnCode(ERR); + + if (r) *r = SP->_color_table[color].red; + if (g) *g = SP->_color_table[color].green; + if (b) *b = SP->_color_table[color].blue; + returnCode(OK); +} + +int pair_content(short pair, short *f, short *b) +{ + T((T_CALLED("pair_content(%d,%p,%p)"), pair, f, b)); + + if ((pair < 0) || (pair > COLOR_PAIRS)) + returnCode(ERR); + if (f) *f = ((SP->_color_pairs[pair] >> C_SHIFT) & C_MASK); + if (b) *b = (SP->_color_pairs[pair] & C_MASK); + + returnCode(OK); +} + +void _nc_do_color(int pair, bool reverse, int (*outc)(int)) +{ + short fg, bg; + + if (pair == 0) + { + if (orig_pair) + { + TPUTS_TRACE("orig_pair"); + tputs(orig_pair, 1, outc); + } + else if (set_color_pair) + { + TPUTS_TRACE("set_color_pair"); + tputs(tparm(set_color_pair, pair), 1, outc); + } + else + { + set_foreground_color(COLOR_WHITE, outc); + set_background_color(COLOR_BLACK, outc); + } + } + else + { + if (set_color_pair) + { + TPUTS_TRACE("set_color_pair"); + tputs(tparm(set_color_pair, pair), 1, outc); + } + else + { + pair_content(pair, &fg, &bg); + if (reverse) { + short xx = fg; + fg = bg; + bg = xx; + } + + T(("setting colors: pair = %d, fg = %d, bg = %d", pair, fg, bg)); + + if (fg == C_MASK || bg == C_MASK) + { + if (set_original_colors() != TRUE) + { + if (fg == C_MASK) + set_foreground_color(COLOR_WHITE, outc); + if (bg == C_MASK) + set_background_color(COLOR_BLACK, outc); + } + } + if (fg != C_MASK) + { + set_foreground_color(fg, outc); + } + if (bg != C_MASK) + { + set_background_color(bg, outc); + } + } + } +} |