+++ /dev/null
-/****************************************************************************
- * 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 1.24 1998/02/11 12:13:58 tom Exp $")
-
-/*
- * Only 8 ANSI colors are defined; the ISO 6429 control sequences work only
- * for 8 values (0-7).
- */
-#define MAX_ANSI_COLOR 8
-
-/*
- * 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 */
-};
-
-int start_color(void)
-{
- T((T_CALLED("start_color()")));
-
-#ifdef orig_pair
- if (orig_pair != NULL)
- {
- TPUTS_TRACE("orig_pair");
- putp(orig_pair);
- }
-#endif /* orig_pair */
-#ifdef orig_colors
- if (orig_colors != NULL)
- {
- TPUTS_TRACE("orig_colors");
- putp(orig_colors);
- }
-#endif /* orig_colors */
-#if defined(orig_pair) && defined(orig_colors)
- if (!orig_pair && !orig_colors)
- returnCode(ERR);
-#endif /* defined(orig_pair) && defined(orig_colors) */
- if (max_pairs != -1)
- COLOR_PAIRS = SP->_pair_count = max_pairs;
- else
- returnCode(ERR);
- SP->_color_pairs = typeCalloc(unsigned short, max_pairs);
- 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;
-
- SP->_color_table = malloc(sizeof(color_t) * COLORS);
-#ifdef hue_lightness_saturation
- if (hue_lightness_saturation)
- memcpy(SP->_color_table, hls_palette, sizeof(color_t) * COLORS);
- else
-#endif /* hue_lightness_saturation */
- memcpy(SP->_color_table, cga_palette, sizeof(color_t) * COLORS);
-
- if (orig_colors)
- {
- TPUTS_TRACE("orig_colors");
- putp(orig_colors);
- }
-
- T(("started color: COLORS = %d, COLOR_PAIRS = %d", COLORS, COLOR_PAIRS));
-
- returnCode(OK);
-}
-
-#ifdef hue_lightness_saturation
-/* 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;
-}
-#endif /* hue_lightness_saturation */
-
-/*
- * Extension (1997/1/18) - Allow negative f/b values to set default color
- * values.
- */
-int init_pair(short pair, short f, short b)
-{
- 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);
-
- /*
- * FIXME: 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)
- */
-
- SP->_color_pairs[pair] = PAIR_OF(f,b);
-
- 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));
-#ifdef initialize_color
- if (initialize_color == NULL)
- returnCode(ERR);
-#endif /* initialize_color */
-
- if (color < 0 || color >= COLORS)
- returnCode(ERR);
- if (r < 0 || r > 1000 || g < 0 || g > 1000 || b < 0 || b > 1000)
- returnCode(ERR);
-
-#ifdef hue_lightness_saturation
- if (hue_lightness_saturation)
- rgb2hls(r, g, b,
- &SP->_color_table[color].red,
- &SP->_color_table[color].green,
- &SP->_color_table[color].blue);
- else
-#endif /* hue_lightness_saturation */
- {
- SP->_color_table[color].red = r;
- SP->_color_table[color].green = g;
- SP->_color_table[color].blue = b;
- }
-
-#ifdef initialize_color
- if (initialize_color)
- {
- TPUTS_TRACE("initialize_color");
- putp(tparm(initialize_color, color, r, g, b));
- }
-#endif /* initialize_color */
- 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 (((orig_pair != NULL || orig_colors != NULL)
- && (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);
-}
-
-/*
- * 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;
-}
-
-void _nc_do_color(int pair, bool reverse, int (*outc)(int))
-{
- short fg, bg;
-
- if (reverse)
- pair = -pair;
-
- 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
- {
- 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 (orig_pair)
- {
- TPUTS_TRACE("orig_pair");
- tputs(orig_pair, 1, outc);
- }
- else
- {
- TPUTS_TRACE("orig_colors");
- tputs(orig_colors, 1, outc);
- }
- }
- if (fg != C_MASK)
- {
- if (set_a_foreground && fg <= MAX_ANSI_COLOR)
- {
- 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);
- }
- }
- if (bg != C_MASK)
- {
- if (set_a_background && bg <= MAX_ANSI_COLOR)
- {
- 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);
- }
- }
- }
- }
-}
projects / ncurses.git / blobdiff