diff options
Diffstat (limited to 'ncurses-5.2/ncurses/base/lib_color.c')
-rw-r--r-- | ncurses-5.2/ncurses/base/lib_color.c | 482 |
1 files changed, 0 insertions, 482 deletions
diff --git a/ncurses-5.2/ncurses/base/lib_color.c b/ncurses-5.2/ncurses/base/lib_color.c deleted file mode 100644 index 514d546..0000000 --- a/ncurses-5.2/ncurses/base/lib_color.c +++ /dev/null @@ -1,482 +0,0 @@ -/**************************************************************************** - * Copyright (c) 1998,1999,2000 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> -#include <tic.h> - -MODULE_ID("$Id$") - -/* - * These should be screen structure members. They need to be globals for - * historical reasons. So we assign them in start_color() and also in - * set_term()'s screen-switching logic. - */ -int COLOR_PAIRS = 0; -int COLORS = 0; - -/* - * 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 -/* *INDENT-OFF* */ -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 */ -}; -/* *INDENT-ON* */ - -#if NCURSES_EXT_FUNCS -/* - * These are called from _nc_do_color(), which in turn is called from - * vidattr - so we have to assume that SP may be null. - */ -static int -default_fg(void) -{ - return (SP != 0) ? SP->_default_fg : COLOR_WHITE; -} - -static int -default_bg(void) -{ - return SP != 0 ? SP->_default_bg : COLOR_BLACK; -} -#else -#define default_fg() COLOR_WHITE -#define default_bg() COLOR_BLACK -#endif - -/* - * 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) -{ - int n; - const color_t *tp; - - T((T_CALLED("start_color()"))); - - if (set_original_colors() != TRUE) { - set_foreground_color(default_fg(), _nc_outch); - set_background_color(default_bg(), _nc_outch); - } - - if (VALID_NUMERIC(max_pairs)) - 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(default_fg(), default_bg()); - if (VALID_NUMERIC(max_colors)) - COLORS = SP->_color_count = max_colors; - else - returnCode(ERR); - SP->_coloron = 1; - - if ((SP->_color_table = typeMalloc(color_t, COLORS)) == 0) - returnCode(ERR); - tp = (hue_lightness_saturation) ? hls_palette : cga_palette; - for (n = 0; n < COLORS; n++) { - if (n < 8) { - SP->_color_table[n] = tp[n]; - } else { - SP->_color_table[n] = tp[n % 8]; - if (hue_lightness_saturation) { - SP->_color_table[n].green = 100; - } else { - if (SP->_color_table[n].red) - SP->_color_table[n].red = 1000; - if (SP->_color_table[n].green) - SP->_color_table[n].green = 1000; - if (SP->_color_table[n].blue) - SP->_color_table[n].blue = 1000; - } - } - } - - 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 < 0) || (pair >= COLOR_PAIRS)) - returnCode(ERR); -#if NCURSES_EXT_FUNCS - 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 -#endif - { - if ((f < 0) || (f >= COLORS) - || (b < 0) || (b >= COLORS) - || (pair < 1)) - 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 ((int) (SP->_current_attr & A_COLOR) == COLOR_PAIR(pair)) - SP->_current_attr |= A_COLOR; /* force attribute update */ - - 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((VALID_NUMERIC(max_colors) && VALID_NUMERIC(max_pairs) - && (((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 old_pair, int pair, bool reverse, int (*outc) (int)) -{ - NCURSES_COLOR_T fg = C_MASK, bg = C_MASK; - NCURSES_COLOR_T old_fg, old_bg; - - if (pair < 0 || pair >= COLOR_PAIRS) { - return; - } else if (pair != 0) { - if (set_color_pair) { - TPUTS_TRACE("set_color_pair"); - tputs(tparm(set_color_pair, pair), 1, outc); - return; - } else if (SP != 0) { - pair_content(pair, &fg, &bg); - } - } - - if (old_pair >= 0 && SP != 0) { - pair_content(old_pair, &old_fg, &old_bg); - if ((fg == C_MASK && old_fg != C_MASK) - || (bg == C_MASK && old_bg != C_MASK)) { -#if NCURSES_EXT_FUNCS - /* - * A minor optimization - but extension. If "AX" is specified in - * the terminal description, treat it as screen's indicator of ECMA - * SGR 39 and SGR 49, and assume the two sequences are independent. - */ - if (SP->_has_sgr_39_49 && old_bg == C_MASK && old_fg != C_MASK) { - tputs("\033[39m", 1, outc); - } else if (SP->_has_sgr_39_49 && old_fg == C_MASK && old_bg != C_MASK) { - tputs("\033[49m", 1, outc); - } else -#endif - set_original_colors(); - } - } else { - set_original_colors(); - if (old_pair < 0) - return; - } - -#if NCURSES_EXT_FUNCS - if (fg == C_MASK) - fg = default_fg(); - if (bg == C_MASK) - bg = default_bg(); -#endif - - if (reverse) { - NCURSES_COLOR_T xx = fg; - fg = bg; - bg = xx; - } - - TR(TRACE_ATTRS, ("setting colors: pair = %d, fg = %d, bg = %d", pair, fg, bg)); - - if (fg != C_MASK) { - set_foreground_color(fg, outc); - } - if (bg != C_MASK) { - set_background_color(bg, outc); - } -} |