1 /****************************************************************************
2 * Copyright 2018-2022,2023 Thomas E. Dickey *
3 * Copyright 1998-2016,2017 Free Software Foundation, Inc. *
4 * *
5 * Permission is hereby granted, free of charge, to any person obtaining a *
6 * copy of this software and associated documentation files (the *
7 * "Software"), to deal in the Software without restriction, including *
8 * without limitation the rights to use, copy, modify, merge, publish, *
9 * distribute, distribute with modifications, sublicense, and/or sell *
10 * copies of the Software, and to permit persons to whom the Software is *
11 * furnished to do so, subject to the following conditions: *
12 * *
13 * The above copyright notice and this permission notice shall be included *
14 * in all copies or substantial portions of the Software. *
15 * *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * *
24 * Except as contained in this notice, the name(s) of the above copyright *
25 * holders shall not be used in advertising or otherwise to promote the *
26 * sale, use or other dealings in this Software without prior written *
27 * authorization. *
28 ****************************************************************************/
29
30 /****************************************************************************
31 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
32 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
33 * and: Thomas E. Dickey 1996-on *
34 * and: Juergen Pfeifer 2009 *
35 ****************************************************************************/
36
37 /* lib_color.c
38 *
39 * Handles color emulation of SYS V curses
40 */
41
42 #define NEW_PAIR_INTERNAL 1
43
44 #include <curses.priv.h>
45 #include <new_pair.h>
46 #include <tic.h>
47
48 #ifndef CUR
49 #define CUR SP_TERMTYPE
50 #endif
51
52 MODULE_ID("$Id: lib_color.c,v 1.150 2023/09/16 16:39:15 tom Exp $")
53
54 #ifdef USE_TERM_DRIVER
55 #define CanChange InfoOf(SP_PARM).canchange
56 #define DefaultPalette InfoOf(SP_PARM).defaultPalette
57 #define HasColor InfoOf(SP_PARM).hascolor
58 #define InitColor InfoOf(SP_PARM).initcolor
59 #define MaxColors InfoOf(SP_PARM).maxcolors
60 #define MaxPairs InfoOf(SP_PARM).maxpairs
61 #define UseHlsPalette (DefaultPalette == _nc_hls_palette)
62 #else
63 #define CanChange can_change
64 #define DefaultPalette (hue_lightness_saturation ? hls_palette : cga_palette)
65 #define HasColor has_color
66 #define InitColor initialize_color
67 #define MaxColors max_colors
68 #define MaxPairs max_pairs
69 #define UseHlsPalette (hue_lightness_saturation)
70 #endif
71
72 #ifndef USE_TERM_DRIVER
73 /*
74 * These should be screen structure members. They need to be globals for
75 * historical reasons. So we assign them in start_color() and also in
76 * set_term()'s screen-switching logic.
77 */
78 #if USE_REENTRANT
NCURSES_EXPORT(int)79 NCURSES_EXPORT(int)
80 NCURSES_PUBLIC_VAR(COLOR_PAIRS) (void)
81 {
82 return SP ? SP->_pair_count : -1;
83 }
84 NCURSES_EXPORT(int)
NCURSES_PUBLIC_VAR(COLORS)85 NCURSES_PUBLIC_VAR(COLORS) (void)
86 {
87 return SP ? SP->_color_count : -1;
88 }
89 #else
90 NCURSES_EXPORT_VAR(int) COLOR_PAIRS = 0;
91 NCURSES_EXPORT_VAR(int) COLORS = 0;
92 #endif
93 #endif /* !USE_TERM_DRIVER */
94
95 #define DATA(r,g,b) {r,g,b, 0,0,0, 0}
96
97 #define MAX_PALETTE 8
98
99 #define OkColorHi(n) (((n) < COLORS) && ((n) < maxcolors))
100 #define InPalette(n) ((n) >= 0 && (n) < MAX_PALETTE)
101
102 /*
103 * Given a RGB range of 0..1000, we'll normally set the individual values
104 * to about 2/3 of the maximum, leaving full-range for bold/bright colors.
105 */
106 #define RGB_ON 680
107 #define RGB_OFF 0
108 /* *INDENT-OFF* */
109 static const color_t cga_palette[] =
110 {
111 /* R G B */
112 DATA(RGB_OFF, RGB_OFF, RGB_OFF), /* COLOR_BLACK */
113 DATA(RGB_ON, RGB_OFF, RGB_OFF), /* COLOR_RED */
114 DATA(RGB_OFF, RGB_ON, RGB_OFF), /* COLOR_GREEN */
115 DATA(RGB_ON, RGB_ON, RGB_OFF), /* COLOR_YELLOW */
116 DATA(RGB_OFF, RGB_OFF, RGB_ON), /* COLOR_BLUE */
117 DATA(RGB_ON, RGB_OFF, RGB_ON), /* COLOR_MAGENTA */
118 DATA(RGB_OFF, RGB_ON, RGB_ON), /* COLOR_CYAN */
119 DATA(RGB_ON, RGB_ON, RGB_ON), /* COLOR_WHITE */
120 };
121
122 static const color_t hls_palette[] =
123 {
124 /* H L S */
125 DATA( 0, 0, 0), /* COLOR_BLACK */
126 DATA( 120, 50, 100), /* COLOR_RED */
127 DATA( 240, 50, 100), /* COLOR_GREEN */
128 DATA( 180, 50, 100), /* COLOR_YELLOW */
129 DATA( 330, 50, 100), /* COLOR_BLUE */
130 DATA( 60, 50, 100), /* COLOR_MAGENTA */
131 DATA( 300, 50, 100), /* COLOR_CYAN */
132 DATA( 0, 50, 100), /* COLOR_WHITE */
133 };
134
135 #ifdef USE_TERM_DRIVER
136 NCURSES_EXPORT_VAR(const color_t*) _nc_cga_palette = cga_palette;
137 NCURSES_EXPORT_VAR(const color_t*) _nc_hls_palette = hls_palette;
138 #endif
139
140 /* *INDENT-ON* */
141 #if NCURSES_EXT_FUNCS
142 /*
143 * These are called from _nc_do_color(), which in turn is called from
144 * vidattr - so we have to assume that sp may be null.
145 */
146 static int
default_fg(NCURSES_SP_DCL0)147 default_fg(NCURSES_SP_DCL0)
148 {
149 return (SP_PARM != 0) ? SP_PARM->_default_fg : COLOR_WHITE;
150 }
151
152 static int
default_bg(NCURSES_SP_DCL0)153 default_bg(NCURSES_SP_DCL0)
154 {
155 return SP_PARM != 0 ? SP_PARM->_default_bg : COLOR_BLACK;
156 }
157 #else
158 #define default_fg(sp) COLOR_WHITE
159 #define default_bg(sp) COLOR_BLACK
160 #endif
161
162 #ifndef USE_TERM_DRIVER
163 /*
164 * SVr4 curses is known to interchange color codes (1,4) and (3,6), possibly
165 * to maintain compatibility with a pre-ANSI scheme. The same scheme is
166 * also used in the FreeBSD syscons.
167 */
168 static int
toggled_colors(int c)169 toggled_colors(int c)
170 {
171 if (c < 16) {
172 static const int table[] =
173 {0, 4, 2, 6, 1, 5, 3, 7,
174 8, 12, 10, 14, 9, 13, 11, 15};
175 c = table[c];
176 }
177 return c;
178 }
179 #endif
180
181 static void
set_background_color(NCURSES_SP_DCLx int bg,NCURSES_SP_OUTC outc)182 set_background_color(NCURSES_SP_DCLx int bg, NCURSES_SP_OUTC outc)
183 {
184 #ifdef USE_TERM_DRIVER
185 CallDriver_3(SP_PARM, td_color, FALSE, bg, outc);
186 #else
187 if (set_a_background) {
188 TPUTS_TRACE("set_a_background");
189 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
190 TIPARM_1(set_a_background, bg),
191 1, outc);
192 } else {
193 TPUTS_TRACE("set_background");
194 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
195 TIPARM_1(set_background, toggled_colors(bg)),
196 1, outc);
197 }
198 #endif
199 }
200
201 static void
set_foreground_color(NCURSES_SP_DCLx int fg,NCURSES_SP_OUTC outc)202 set_foreground_color(NCURSES_SP_DCLx int fg, NCURSES_SP_OUTC outc)
203 {
204 #ifdef USE_TERM_DRIVER
205 CallDriver_3(SP_PARM, td_color, TRUE, fg, outc);
206 #else
207 if (set_a_foreground) {
208 TPUTS_TRACE("set_a_foreground");
209 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
210 TIPARM_1(set_a_foreground, fg),
211 1, outc);
212 } else {
213 TPUTS_TRACE("set_foreground");
214 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
215 TIPARM_1(set_foreground, toggled_colors(fg)),
216 1, outc);
217 }
218 #endif
219 }
220
221 static void
init_color_table(NCURSES_SP_DCL0)222 init_color_table(NCURSES_SP_DCL0)
223 {
224 const color_t *tp = DefaultPalette;
225 int n;
226
227 assert(tp != 0);
228
229 for (n = 0; n < COLORS; n++) {
230 if (InPalette(n)) {
231 SP_PARM->_color_table[n] = tp[n];
232 } else {
233 SP_PARM->_color_table[n] = tp[n % MAX_PALETTE];
234 if (UseHlsPalette) {
235 SP_PARM->_color_table[n].green = 100;
236 } else {
237 if (SP_PARM->_color_table[n].red)
238 SP_PARM->_color_table[n].red = 1000;
239 if (SP_PARM->_color_table[n].green)
240 SP_PARM->_color_table[n].green = 1000;
241 if (SP_PARM->_color_table[n].blue)
242 SP_PARM->_color_table[n].blue = 1000;
243 }
244 }
245 }
246 }
247
248 static bool
init_direct_colors(NCURSES_SP_DCL0)249 init_direct_colors(NCURSES_SP_DCL0)
250 {
251 static NCURSES_CONST char name[] = "RGB";
252
253 rgb_bits_t *result = &(SP_PARM->_direct_color);
254
255 result->value = 0;
256
257 if (COLORS >= 8) {
258 int n;
259 const char *s;
260 int width;
261
262 /* find the number of bits needed for the maximum color value */
263 for (width = 0; (1 << width) - 1 < (COLORS - 1); ++width) {
264 ;
265 }
266
267 if (tigetflag(name) > 0) {
268 n = (width + 2) / 3;
269 result->bits.red = UChar(n);
270 result->bits.green = UChar(n);
271 result->bits.blue = UChar(width - (2 * n));
272 } else if ((n = tigetnum(name)) > 0) {
273 result->bits.red = UChar(n);
274 result->bits.green = UChar(n);
275 result->bits.blue = UChar(n);
276 } else if ((s = tigetstr(name)) != 0 && VALID_STRING(s)) {
277 int red = n;
278 int green = n;
279 int blue = width - (2 * n);
280
281 switch (sscanf(s, "%d/%d/%d", &red, &green, &blue)) {
282 default:
283 blue = width - (2 * n);
284 /* FALLTHRU */
285 case 1:
286 green = n;
287 /* FALLTHRU */
288 case 2:
289 red = n;
290 /* FALLTHRU */
291 case 3:
292 /* okay */
293 break;
294 }
295 result->bits.red = UChar(red);
296 result->bits.green = UChar(green);
297 result->bits.blue = UChar(blue);
298 }
299 }
300 return (result->value != 0);
301 }
302
303 /*
304 * Reset the color pair, e.g., to whatever color pair 0 is.
305 */
306 static bool
reset_color_pair(NCURSES_SP_DCL0)307 reset_color_pair(NCURSES_SP_DCL0)
308 {
309 #ifdef USE_TERM_DRIVER
310 return CallDriver(SP_PARM, td_rescol);
311 #else
312 bool result = FALSE;
313
314 (void) SP_PARM;
315 if (orig_pair != 0) {
316 (void) NCURSES_PUTP2("orig_pair", orig_pair);
317 result = TRUE;
318 }
319 return result;
320 #endif
321 }
322
323 /*
324 * Reset color pairs and definitions. Actually we do both more to accommodate
325 * badly-written terminal descriptions than for the relatively rare case where
326 * someone has changed the color definitions.
327 */
328 NCURSES_EXPORT(bool)
NCURSES_SP_NAME(_nc_reset_colors)329 NCURSES_SP_NAME(_nc_reset_colors) (NCURSES_SP_DCL0)
330 {
331 int result = FALSE;
332
333 T((T_CALLED("_nc_reset_colors(%p)"), (void *) SP_PARM));
334 if (SP_PARM->_color_defs > 0)
335 SP_PARM->_color_defs = -(SP_PARM->_color_defs);
336 if (reset_color_pair(NCURSES_SP_ARG))
337 result = TRUE;
338
339 #ifdef USE_TERM_DRIVER
340 result = CallDriver(SP_PARM, td_rescolors);
341 #else
342 if (orig_colors != 0) {
343 NCURSES_PUTP2("orig_colors", orig_colors);
344 result = TRUE;
345 }
346 #endif
347 returnBool(result);
348 }
349
350 #if NCURSES_SP_FUNCS
351 NCURSES_EXPORT(bool)
_nc_reset_colors(void)352 _nc_reset_colors(void)
353 {
354 return NCURSES_SP_NAME(_nc_reset_colors) (CURRENT_SCREEN);
355 }
356 #endif
357
358 NCURSES_EXPORT(int)
NCURSES_SP_NAME(start_color)359 NCURSES_SP_NAME(start_color) (NCURSES_SP_DCL0)
360 {
361 int result = ERR;
362
363 T((T_CALLED("start_color(%p)"), (void *) SP_PARM));
364
365 if (SP_PARM == 0) {
366 result = ERR;
367 } else if (SP_PARM->_coloron) {
368 result = OK;
369 } else {
370 int maxpairs = MaxPairs;
371 int maxcolors = MaxColors;
372 if (reset_color_pair(NCURSES_SP_ARG) != TRUE) {
373 set_foreground_color(NCURSES_SP_ARGx
374 default_fg(NCURSES_SP_ARG),
375 NCURSES_SP_NAME(_nc_outch));
376 set_background_color(NCURSES_SP_ARGx
377 default_bg(NCURSES_SP_ARG),
378 NCURSES_SP_NAME(_nc_outch));
379 }
380 #if !NCURSES_EXT_COLORS
381 /*
382 * Without ext-colors, we cannot represent more than 256 color pairs.
383 */
384 if (maxpairs > 256)
385 maxpairs = 256;
386 #endif
387
388 if (maxpairs > 0 && maxcolors > 0) {
389 SP_PARM->_pair_limit = maxpairs;
390
391 #if NCURSES_EXT_FUNCS
392 /*
393 * If using default colors, allocate extra space in table to
394 * allow for default-color as a component of a color-pair.
395 */
396 SP_PARM->_pair_limit += (1 + (2 * maxcolors));
397 #if !NCURSES_EXT_COLORS
398 SP_PARM->_pair_limit = limit_PAIRS(SP_PARM->_pair_limit);
399 #endif
400 #endif /* NCURSES_EXT_FUNCS */
401 SP_PARM->_pair_count = maxpairs;
402 SP_PARM->_color_count = maxcolors;
403 #if !USE_REENTRANT
404 COLOR_PAIRS = maxpairs;
405 COLORS = maxcolors;
406 #endif
407
408 ReservePairs(SP_PARM, 16);
409 if (SP_PARM->_color_pairs != 0) {
410 if (init_direct_colors(NCURSES_SP_ARG)) {
411 result = OK;
412 } else {
413 TYPE_CALLOC(color_t, maxcolors, SP_PARM->_color_table);
414 if (SP_PARM->_color_table != 0) {
415 MakeColorPair(SP_PARM->_color_pairs[0],
416 default_fg(NCURSES_SP_ARG),
417 default_bg(NCURSES_SP_ARG));
418 init_color_table(NCURSES_SP_ARG);
419
420 result = OK;
421 }
422 }
423 if (result == OK) {
424 T(("started color: COLORS = %d, COLOR_PAIRS = %d",
425 COLORS, COLOR_PAIRS));
426
427 SP_PARM->_coloron = 1;
428 } else if (SP_PARM->_color_pairs != 0) {
429 FreeAndNull(SP_PARM->_color_pairs);
430 }
431 }
432 } else {
433 result = OK;
434 }
435 }
436 returnCode(result);
437 }
438
439 #if NCURSES_SP_FUNCS
440 NCURSES_EXPORT(int)
start_color(void)441 start_color(void)
442 {
443 return NCURSES_SP_NAME(start_color) (CURRENT_SCREEN);
444 }
445 #endif
446
447 /* This function was originally written by Daniel Weaver <danw@znyx.com> */
448 static void
rgb2hls(int r,int g,int b,int * h,int * l,int * s)449 rgb2hls(int r, int g, int b, int *h, int *l, int *s)
450 /* convert RGB to HLS system */
451 {
452 int min, max, t;
453
454 if ((min = g < r ? g : r) > b)
455 min = b;
456 if ((max = g > r ? g : r) < b)
457 max = b;
458
459 /* calculate lightness */
460 *l = ((min + max) / 20);
461
462 if (min == max) { /* black, white and all shades of gray */
463 *h = 0;
464 *s = 0;
465 return;
466 }
467
468 /* calculate saturation */
469 if (*l < 50)
470 *s = (((max - min) * 100) / (max + min));
471 else
472 *s = (((max - min) * 100) / (2000 - max - min));
473
474 /* calculate hue */
475 if (r == max)
476 t = (120 + ((g - b) * 60) / (max - min));
477 else if (g == max)
478 t = (240 + ((b - r) * 60) / (max - min));
479 else
480 t = (360 + ((r - g) * 60) / (max - min));
481
482 *h = (t % 360);
483 }
484
485 /*
486 * Change all cells which use(d) a given color pair to force a repaint.
487 */
488 NCURSES_EXPORT(void)
_nc_change_pair(SCREEN * sp,int pair)489 _nc_change_pair(SCREEN *sp, int pair)
490 {
491 int y, x;
492
493 if (CurScreen(sp)->_clear)
494 return;
495 #if NO_LEAKS
496 if (_nc_globals.leak_checking)
497 return;
498 #endif
499
500 for (y = 0; y <= CurScreen(sp)->_maxy; y++) {
501 struct ldat *ptr = &(CurScreen(sp)->_line[y]);
502 bool changed = FALSE;
503 for (x = 0; x <= CurScreen(sp)->_maxx; x++) {
504 if (GetPair(ptr->text[x]) == pair) {
505 /* Set the old cell to zero to ensure it will be
506 updated on the next doupdate() */
507 SetChar(ptr->text[x], 0, 0);
508 CHANGED_CELL(ptr, x);
509 changed = TRUE;
510 }
511 }
512 if (changed)
513 NCURSES_SP_NAME(_nc_make_oldhash) (NCURSES_SP_ARGx y);
514 }
515 }
516
517 NCURSES_EXPORT(void)
_nc_reserve_pairs(SCREEN * sp,int want)518 _nc_reserve_pairs(SCREEN *sp, int want)
519 {
520 int have = sp->_pair_alloc;
521
522 if (have == 0)
523 have = 1;
524 while (have <= want)
525 have *= 2;
526 if (have > sp->_pair_limit)
527 have = sp->_pair_limit;
528
529 if (sp->_color_pairs == 0) {
530 TYPE_CALLOC(colorpair_t, have, sp->_color_pairs);
531 } else if (have > sp->_pair_alloc) {
532 #if NCURSES_EXT_COLORS
533 colorpair_t *next;
534
535 if ((next = typeCalloc(colorpair_t, have)) == 0)
536 _nc_err_abort(MSG_NO_MEMORY);
537 memcpy(next, sp->_color_pairs, (size_t) sp->_pair_alloc * sizeof(*next));
538 _nc_copy_pairs(sp, next, sp->_color_pairs, sp->_pair_alloc);
539 free(sp->_color_pairs);
540 sp->_color_pairs = next;
541 #else
542 TYPE_REALLOC(colorpair_t, have, sp->_color_pairs);
543 if (sp->_color_pairs != 0) {
544 memset(sp->_color_pairs + sp->_pair_alloc, 0,
545 sizeof(colorpair_t) * (size_t) (have - sp->_pair_alloc));
546 }
547 #endif
548 }
549 if (sp->_color_pairs != 0) {
550 sp->_pair_alloc = have;
551 }
552 }
553
554 /*
555 * Extension (1997/1/18) - Allow negative f/b values to set default color
556 * values.
557 */
558 NCURSES_EXPORT(int)
_nc_init_pair(SCREEN * sp,int pair,int f,int b)559 _nc_init_pair(SCREEN *sp, int pair, int f, int b)
560 {
561 static colorpair_t null_pair;
562 colorpair_t result = null_pair;
563 colorpair_t previous;
564 int maxcolors;
565
566 T((T_CALLED("init_pair(%p,%d,%d,%d)"), (void *) sp, pair, f, b));
567
568 if (!ValidPair(sp, pair))
569 returnCode(ERR);
570
571 maxcolors = MaxColors;
572
573 ReservePairs(sp, pair);
574 previous = sp->_color_pairs[pair];
575 #if NCURSES_EXT_FUNCS
576 if (sp->_default_color || sp->_assumed_color) {
577 bool isDefault = FALSE;
578 bool wasDefault = FALSE;
579 int default_pairs = sp->_default_pairs;
580
581 /*
582 * Map caller's color number, e.g., -1, 0, 1, .., 7, etc., into
583 * internal unsigned values which we will store in the _color_pairs[]
584 * table.
585 */
586 if (isDefaultColor(f)) {
587 f = COLOR_DEFAULT;
588 isDefault = TRUE;
589 } else if (!OkColorHi(f)) {
590 returnCode(ERR);
591 }
592
593 if (isDefaultColor(b)) {
594 b = COLOR_DEFAULT;
595 isDefault = TRUE;
596 } else if (!OkColorHi(b)) {
597 returnCode(ERR);
598 }
599
600 /*
601 * Check if the table entry that we are going to init/update used
602 * default colors.
603 */
604 if (isDefaultColor(FORE_OF(previous))
605 || isDefaultColor(BACK_OF(previous)))
606 wasDefault = TRUE;
607
608 /*
609 * Keep track of the number of entries in the color pair table which
610 * used a default color.
611 */
612 if (isDefault && !wasDefault) {
613 ++default_pairs;
614 } else if (wasDefault && !isDefault) {
615 --default_pairs;
616 }
617
618 /*
619 * As an extension, ncurses allows the pair number to exceed the
620 * terminal's color_pairs value for pairs using a default color.
621 *
622 * Note that updating a pair which used a default color with one
623 * that does not will decrement the count - and possibly interfere
624 * with sequentially adding new pairs.
625 */
626 if (pair > (sp->_pair_count + default_pairs)) {
627 returnCode(ERR);
628 }
629 sp->_default_pairs = default_pairs;
630 } else
631 #endif
632 {
633 if ((f < 0) || !OkColorHi(f)
634 || (b < 0) || !OkColorHi(b)
635 || (pair < 1)) {
636 returnCode(ERR);
637 }
638 }
639
640 /*
641 * When a pair's content is changed, replace its colors (if pair was
642 * initialized before a screen update is performed replacing original
643 * pair colors with the new ones).
644 */
645 MakeColorPair(result, f, b);
646 if ((FORE_OF(previous) != 0
647 || BACK_OF(previous) != 0)
648 && !isSamePair(previous, result)) {
649 _nc_change_pair(sp, pair);
650 }
651
652 _nc_reset_color_pair(sp, pair, &result);
653 sp->_color_pairs[pair] = result;
654 _nc_set_color_pair(sp, pair, cpINIT);
655
656 if (GET_SCREEN_PAIR(sp) == pair)
657 SET_SCREEN_PAIR(sp, (int) (~0)); /* force attribute update */
658
659 #ifdef USE_TERM_DRIVER
660 CallDriver_3(sp, td_initpair, pair, f, b);
661 #else
662 if (initialize_pair && InPalette(f) && InPalette(b)) {
663 const color_t *tp = DefaultPalette;
664
665 TR(TRACE_ATTRS,
666 ("initializing pair: pair = %d, fg=(%d,%d,%d), bg=(%d,%d,%d)",
667 (int) pair,
668 (int) tp[f].red, (int) tp[f].green, (int) tp[f].blue,
669 (int) tp[b].red, (int) tp[b].green, (int) tp[b].blue));
670
671 NCURSES_PUTP2("initialize_pair",
672 TIPARM_7(initialize_pair,
673 pair,
674 (int) tp[f].red,
675 (int) tp[f].green,
676 (int) tp[f].blue,
677 (int) tp[b].red,
678 (int) tp[b].green,
679 (int) tp[b].blue));
680 }
681 #endif
682
683 returnCode(OK);
684 }
685
686 NCURSES_EXPORT(int)
NCURSES_SP_NAME(init_pair)687 NCURSES_SP_NAME(init_pair) (NCURSES_SP_DCLx
688 NCURSES_PAIRS_T pair,
689 NCURSES_COLOR_T f,
690 NCURSES_COLOR_T b)
691 {
692 return _nc_init_pair(SP_PARM, pair, f, b);
693 }
694
695 #if NCURSES_SP_FUNCS
696 NCURSES_EXPORT(int)
init_pair(NCURSES_COLOR_T pair,NCURSES_COLOR_T f,NCURSES_COLOR_T b)697 init_pair(NCURSES_COLOR_T pair, NCURSES_COLOR_T f, NCURSES_COLOR_T b)
698 {
699 return NCURSES_SP_NAME(init_pair) (CURRENT_SCREEN, pair, f, b);
700 }
701 #endif
702
703 #define okRGB(n) ((n) >= 0 && (n) <= 1000)
704
705 NCURSES_EXPORT(int)
_nc_init_color(SCREEN * sp,int color,int r,int g,int b)706 _nc_init_color(SCREEN *sp, int color, int r, int g, int b)
707 {
708 int result = ERR;
709 int maxcolors;
710
711 T((T_CALLED("init_color(%p,%d,%d,%d,%d)"),
712 (void *) sp,
713 color,
714 r, g, b));
715
716 if (sp == 0 || sp->_direct_color.value)
717 returnCode(result);
718
719 maxcolors = MaxColors;
720
721 if (InitColor
722 && sp->_coloron
723 && (color >= 0 && OkColorHi(color))
724 && (okRGB(r) && okRGB(g) && okRGB(b))) {
725
726 sp->_color_table[color].init = 1;
727 sp->_color_table[color].r = r;
728 sp->_color_table[color].g = g;
729 sp->_color_table[color].b = b;
730
731 if (UseHlsPalette) {
732 rgb2hls(r, g, b,
733 &sp->_color_table[color].red,
734 &sp->_color_table[color].green,
735 &sp->_color_table[color].blue);
736 } else {
737 sp->_color_table[color].red = r;
738 sp->_color_table[color].green = g;
739 sp->_color_table[color].blue = b;
740 }
741
742 #ifdef USE_TERM_DRIVER
743 CallDriver_4(sp, td_initcolor, color, r, g, b);
744 #else
745 NCURSES_PUTP2("initialize_color",
746 TIPARM_4(initialize_color, color, r, g, b));
747 #endif
748 sp->_color_defs = Max(color + 1, sp->_color_defs);
749
750 result = OK;
751 }
752 returnCode(result);
753 }
754
755 NCURSES_EXPORT(int)
NCURSES_SP_NAME(init_color)756 NCURSES_SP_NAME(init_color) (NCURSES_SP_DCLx
757 NCURSES_COLOR_T color,
758 NCURSES_COLOR_T r,
759 NCURSES_COLOR_T g,
760 NCURSES_COLOR_T b)
761 {
762 return _nc_init_color(SP_PARM, color, r, g, b);
763 }
764
765 #if NCURSES_SP_FUNCS
766 NCURSES_EXPORT(int)
init_color(NCURSES_COLOR_T color,NCURSES_COLOR_T r,NCURSES_COLOR_T g,NCURSES_COLOR_T b)767 init_color(NCURSES_COLOR_T color,
768 NCURSES_COLOR_T r,
769 NCURSES_COLOR_T g,
770 NCURSES_COLOR_T b)
771 {
772 return NCURSES_SP_NAME(init_color) (CURRENT_SCREEN, color, r, g, b);
773 }
774 #endif
775
776 NCURSES_EXPORT(bool)
NCURSES_SP_NAME(can_change_color)777 NCURSES_SP_NAME(can_change_color) (NCURSES_SP_DCL)
778 {
779 int result = FALSE;
780
781 T((T_CALLED("can_change_color(%p)"), (void *) SP_PARM));
782
783 if (HasTerminal(SP_PARM) && (CanChange != 0)) {
784 result = TRUE;
785 }
786
787 returnCode(result);
788 }
789
790 #if NCURSES_SP_FUNCS
791 NCURSES_EXPORT(bool)
can_change_color(void)792 can_change_color(void)
793 {
794 return NCURSES_SP_NAME(can_change_color) (CURRENT_SCREEN);
795 }
796 #endif
797
798 NCURSES_EXPORT(bool)
NCURSES_SP_NAME(has_colors)799 NCURSES_SP_NAME(has_colors) (NCURSES_SP_DCL0)
800 {
801 int code = FALSE;
802
803 (void) SP_PARM;
804 T((T_CALLED("has_colors(%p)"), (void *) SP_PARM));
805 if (HasTerminal(SP_PARM)) {
806 #ifdef USE_TERM_DRIVER
807 code = HasColor;
808 #else
809 code = ((VALID_NUMERIC(max_colors) && VALID_NUMERIC(max_pairs)
810 && (((set_foreground != NULL)
811 && (set_background != NULL))
812 || ((set_a_foreground != NULL)
813 && (set_a_background != NULL))
814 || set_color_pair)) ? TRUE : FALSE);
815 #endif
816 }
817 returnCode(code);
818 }
819
820 #if NCURSES_SP_FUNCS
821 NCURSES_EXPORT(bool)
has_colors(void)822 has_colors(void)
823 {
824 return NCURSES_SP_NAME(has_colors) (CURRENT_SCREEN);
825 }
826 #endif
827
828 static int
_nc_color_content(SCREEN * sp,int color,int * r,int * g,int * b)829 _nc_color_content(SCREEN *sp, int color, int *r, int *g, int *b)
830 {
831 int result = ERR;
832
833 T((T_CALLED("color_content(%p,%d,%p,%p,%p)"),
834 (void *) sp,
835 color,
836 (void *) r,
837 (void *) g,
838 (void *) b));
839
840 if (sp != 0) {
841 int maxcolors = MaxColors;
842
843 if (color >= 0 && OkColorHi(color) && sp->_coloron) {
844 int c_r, c_g, c_b;
845
846 if (sp->_direct_color.value) {
847 rgb_bits_t *work = &(sp->_direct_color);
848
849 #define max_direct_color(name) ((1 << work->bits.name) - 1)
850 #define value_direct_color(max) (1000 * ((color >> bitoff) & max)) / max
851
852 int max_r = max_direct_color(red);
853 int max_g = max_direct_color(green);
854 int max_b = max_direct_color(blue);
855
856 int bitoff = 0;
857
858 c_b = value_direct_color(max_b);
859 bitoff += work->bits.blue;
860
861 c_g = value_direct_color(max_g);
862 bitoff += work->bits.green;
863
864 c_r = value_direct_color(max_r);
865
866 } else {
867 c_r = sp->_color_table[color].red;
868 c_g = sp->_color_table[color].green;
869 c_b = sp->_color_table[color].blue;
870 }
871
872 if (r)
873 *r = c_r;
874 if (g)
875 *g = c_g;
876 if (b)
877 *b = c_b;
878
879 TR(TRACE_ATTRS, ("...color_content(%d,%d,%d,%d)",
880 color, c_r, c_g, c_b));
881 result = OK;
882 }
883 }
884 if (result != OK) {
885 if (r)
886 *r = 0;
887 if (g)
888 *g = 0;
889 if (b)
890 *b = 0;
891 }
892 returnCode(result);
893 }
894
895 NCURSES_EXPORT(int)
NCURSES_SP_NAME(color_content)896 NCURSES_SP_NAME(color_content) (NCURSES_SP_DCLx
897 NCURSES_COLOR_T color,
898 NCURSES_COLOR_T *r,
899 NCURSES_COLOR_T *g,
900 NCURSES_COLOR_T *b)
901 {
902 int my_r, my_g, my_b;
903 int rc = _nc_color_content(SP_PARM, color, &my_r, &my_g, &my_b);
904 if (rc == OK) {
905 *r = limit_COLOR(my_r);
906 *g = limit_COLOR(my_g);
907 *b = limit_COLOR(my_b);
908 }
909 return rc;
910 }
911
912 #if NCURSES_SP_FUNCS
913 NCURSES_EXPORT(int)
color_content(NCURSES_COLOR_T color,NCURSES_COLOR_T * r,NCURSES_COLOR_T * g,NCURSES_COLOR_T * b)914 color_content(NCURSES_COLOR_T color,
915 NCURSES_COLOR_T *r,
916 NCURSES_COLOR_T *g,
917 NCURSES_COLOR_T *b)
918 {
919 return NCURSES_SP_NAME(color_content) (CURRENT_SCREEN, color, r, g, b);
920 }
921 #endif
922
923 NCURSES_EXPORT(int)
_nc_pair_content(SCREEN * sp,int pair,int * f,int * b)924 _nc_pair_content(SCREEN *sp, int pair, int *f, int *b)
925 {
926 int result;
927
928 T((T_CALLED("pair_content(%p,%d,%p,%p)"),
929 (void *) sp,
930 (int) pair,
931 (void *) f,
932 (void *) b));
933
934 if (!ValidPair(sp, pair)) {
935 result = ERR;
936 } else {
937 int fg;
938 int bg;
939
940 ReservePairs(sp, pair);
941 fg = FORE_OF(sp->_color_pairs[pair]);
942 bg = BACK_OF(sp->_color_pairs[pair]);
943 #if NCURSES_EXT_FUNCS
944 if (isDefaultColor(fg))
945 fg = -1;
946 if (isDefaultColor(bg))
947 bg = -1;
948 #endif
949
950 if (f)
951 *f = fg;
952 if (b)
953 *b = bg;
954
955 TR(TRACE_ATTRS, ("...pair_content(%p,%d,%d,%d)",
956 (void *) sp,
957 (int) pair,
958 (int) fg, (int) bg));
959 result = OK;
960 }
961 returnCode(result);
962 }
963
964 NCURSES_EXPORT(int)
NCURSES_SP_NAME(pair_content)965 NCURSES_SP_NAME(pair_content) (NCURSES_SP_DCLx
966 NCURSES_PAIRS_T pair,
967 NCURSES_COLOR_T *f,
968 NCURSES_COLOR_T *b)
969 {
970 int my_f, my_b;
971 int rc = _nc_pair_content(SP_PARM, pair, &my_f, &my_b);
972 if (rc == OK) {
973 *f = limit_COLOR(my_f);
974 *b = limit_COLOR(my_b);
975 }
976 return rc;
977 }
978
979 #if NCURSES_SP_FUNCS
980 NCURSES_EXPORT(int)
pair_content(NCURSES_COLOR_T pair,NCURSES_COLOR_T * f,NCURSES_COLOR_T * b)981 pair_content(NCURSES_COLOR_T pair, NCURSES_COLOR_T *f, NCURSES_COLOR_T *b)
982 {
983 return NCURSES_SP_NAME(pair_content) (CURRENT_SCREEN, pair, f, b);
984 }
985 #endif
986
987 NCURSES_EXPORT(void)
NCURSES_SP_NAME(_nc_do_color)988 NCURSES_SP_NAME(_nc_do_color) (NCURSES_SP_DCLx
989 int old_pair,
990 int pair,
991 int reverse,
992 NCURSES_SP_OUTC outc)
993 {
994 #ifdef USE_TERM_DRIVER
995 CallDriver_4(SP_PARM, td_docolor, old_pair, pair, reverse, outc);
996 #else
997 int fg = COLOR_DEFAULT;
998 int bg = COLOR_DEFAULT;
999 int old_fg = -1;
1000 int old_bg = -1;
1001
1002 if (!ValidPair(SP_PARM, pair)) {
1003 return;
1004 } else if (pair != 0) {
1005 if (set_color_pair) {
1006 TPUTS_TRACE("set_color_pair");
1007 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1008 TIPARM_1(set_color_pair, pair),
1009 1, outc);
1010 return;
1011 } else if (SP_PARM != 0) {
1012 if (_nc_pair_content(SP_PARM, pair, &fg, &bg) == ERR)
1013 return;
1014 }
1015 }
1016
1017 if (old_pair >= 0
1018 && SP_PARM != 0
1019 && _nc_pair_content(SP_PARM, old_pair, &old_fg, &old_bg) != ERR) {
1020 if ((isDefaultColor(fg) && !isDefaultColor(old_fg))
1021 || (isDefaultColor(bg) && !isDefaultColor(old_bg))) {
1022 #if NCURSES_EXT_FUNCS
1023 /*
1024 * A minor optimization - but extension. If "AX" is specified in
1025 * the terminal description, treat it as screen's indicator of ECMA
1026 * SGR 39 and SGR 49, and assume the two sequences are independent.
1027 */
1028 if (SP_PARM->_has_sgr_39_49
1029 && isDefaultColor(old_bg)
1030 && !isDefaultColor(old_fg)) {
1031 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx "\033[39m", 1, outc);
1032 } else if (SP_PARM->_has_sgr_39_49
1033 && isDefaultColor(old_fg)
1034 && !isDefaultColor(old_bg)) {
1035 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx "\033[49m", 1, outc);
1036 } else
1037 #endif
1038 reset_color_pair(NCURSES_SP_ARG);
1039 }
1040 } else {
1041 reset_color_pair(NCURSES_SP_ARG);
1042 if (old_pair < 0 && pair <= 0)
1043 return;
1044 }
1045
1046 #if NCURSES_EXT_FUNCS
1047 if (isDefaultColor(fg))
1048 fg = default_fg(NCURSES_SP_ARG);
1049 if (isDefaultColor(bg))
1050 bg = default_bg(NCURSES_SP_ARG);
1051 #endif
1052
1053 if (reverse) {
1054 int xx = fg;
1055 fg = bg;
1056 bg = xx;
1057 }
1058
1059 TR(TRACE_ATTRS, ("setting colors: pair = %d, fg = %d, bg = %d", pair,
1060 fg, bg));
1061
1062 if (!isDefaultColor(fg)) {
1063 set_foreground_color(NCURSES_SP_ARGx fg, outc);
1064 }
1065 if (!isDefaultColor(bg)) {
1066 set_background_color(NCURSES_SP_ARGx bg, outc);
1067 }
1068 #endif
1069 }
1070
1071 #if NCURSES_SP_FUNCS
1072 NCURSES_EXPORT(void)
_nc_do_color(int old_pair,int pair,int reverse,NCURSES_OUTC outc)1073 _nc_do_color(int old_pair, int pair, int reverse, NCURSES_OUTC outc)
1074 {
1075 SetSafeOutcWrapper(outc);
1076 NCURSES_SP_NAME(_nc_do_color) (CURRENT_SCREEN,
1077 old_pair,
1078 pair,
1079 reverse,
1080 _nc_outc_wrapper);
1081 }
1082 #endif
1083
1084 #if NCURSES_EXT_COLORS
1085 NCURSES_EXPORT(int)
NCURSES_SP_NAME(init_extended_pair)1086 NCURSES_SP_NAME(init_extended_pair) (NCURSES_SP_DCLx int pair, int f, int b)
1087 {
1088 return _nc_init_pair(SP_PARM, pair, f, b);
1089 }
1090
1091 NCURSES_EXPORT(int)
NCURSES_SP_NAME(init_extended_color)1092 NCURSES_SP_NAME(init_extended_color) (NCURSES_SP_DCLx
1093 int color,
1094 int r, int g, int b)
1095 {
1096 return _nc_init_color(SP_PARM, color, r, g, b);
1097 }
1098
1099 NCURSES_EXPORT(int)
NCURSES_SP_NAME(extended_color_content)1100 NCURSES_SP_NAME(extended_color_content) (NCURSES_SP_DCLx
1101 int color,
1102 int *r, int *g, int *b)
1103 {
1104 return _nc_color_content(SP_PARM, color, r, g, b);
1105 }
1106
1107 NCURSES_EXPORT(int)
NCURSES_SP_NAME(extended_pair_content)1108 NCURSES_SP_NAME(extended_pair_content) (NCURSES_SP_DCLx
1109 int pair,
1110 int *f, int *b)
1111 {
1112 return _nc_pair_content(SP_PARM, pair, f, b);
1113 }
1114
1115 NCURSES_EXPORT(void)
NCURSES_SP_NAME(reset_color_pairs)1116 NCURSES_SP_NAME(reset_color_pairs) (NCURSES_SP_DCL0)
1117 {
1118 if (SP_PARM != 0) {
1119 if (SP_PARM->_color_pairs) {
1120 _nc_free_ordered_pairs(SP_PARM);
1121 free(SP_PARM->_color_pairs);
1122 SP_PARM->_color_pairs = 0;
1123 SP_PARM->_pair_alloc = 0;
1124 ReservePairs(SP_PARM, 16);
1125 clearok(CurScreen(SP_PARM), TRUE);
1126 touchwin(StdScreen(SP_PARM));
1127 }
1128 }
1129 }
1130
1131 #if NCURSES_SP_FUNCS
1132 NCURSES_EXPORT(int)
init_extended_pair(int pair,int f,int b)1133 init_extended_pair(int pair, int f, int b)
1134 {
1135 return NCURSES_SP_NAME(init_extended_pair) (CURRENT_SCREEN, pair, f, b);
1136 }
1137
1138 NCURSES_EXPORT(int)
init_extended_color(int color,int r,int g,int b)1139 init_extended_color(int color, int r, int g, int b)
1140 {
1141 return NCURSES_SP_NAME(init_extended_color) (CURRENT_SCREEN,
1142 color,
1143 r, g, b);
1144 }
1145
1146 NCURSES_EXPORT(int)
extended_color_content(int color,int * r,int * g,int * b)1147 extended_color_content(int color, int *r, int *g, int *b)
1148 {
1149 return NCURSES_SP_NAME(extended_color_content) (CURRENT_SCREEN,
1150 color,
1151 r, g, b);
1152 }
1153
1154 NCURSES_EXPORT(int)
extended_pair_content(int pair,int * f,int * b)1155 extended_pair_content(int pair, int *f, int *b)
1156 {
1157 return NCURSES_SP_NAME(extended_pair_content) (CURRENT_SCREEN, pair, f, b);
1158 }
1159
1160 NCURSES_EXPORT(void)
reset_color_pairs(void)1161 reset_color_pairs(void)
1162 {
1163 NCURSES_SP_NAME(reset_color_pairs) (CURRENT_SCREEN);
1164 }
1165 #endif /* NCURSES_SP_FUNCS */
1166 #endif /* NCURSES_EXT_COLORS */
1167