1 /****************************************************************************
2 * Copyright 2018-2019,2020 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 1.143 2020/02/02 23:34:34 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 TYPE_CALLOC(type,elts) typeCalloc(type, (unsigned)(elts))
98
99 #define MAX_PALETTE 8
100
101 #define OkColorHi(n) (((n) < COLORS) && ((n) < maxcolors))
102 #define InPalette(n) ((n) >= 0 && (n) < MAX_PALETTE)
103
104 /*
105 * Given a RGB range of 0..1000, we'll normally set the individual values
106 * to about 2/3 of the maximum, leaving full-range for bold/bright colors.
107 */
108 #define RGB_ON 680
109 #define RGB_OFF 0
110 /* *INDENT-OFF* */
111 static const color_t cga_palette[] =
112 {
113 /* R G B */
114 DATA(RGB_OFF, RGB_OFF, RGB_OFF), /* COLOR_BLACK */
115 DATA(RGB_ON, RGB_OFF, RGB_OFF), /* COLOR_RED */
116 DATA(RGB_OFF, RGB_ON, RGB_OFF), /* COLOR_GREEN */
117 DATA(RGB_ON, RGB_ON, RGB_OFF), /* COLOR_YELLOW */
118 DATA(RGB_OFF, RGB_OFF, RGB_ON), /* COLOR_BLUE */
119 DATA(RGB_ON, RGB_OFF, RGB_ON), /* COLOR_MAGENTA */
120 DATA(RGB_OFF, RGB_ON, RGB_ON), /* COLOR_CYAN */
121 DATA(RGB_ON, RGB_ON, RGB_ON), /* COLOR_WHITE */
122 };
123
124 static const color_t hls_palette[] =
125 {
126 /* H L S */
127 DATA( 0, 0, 0), /* COLOR_BLACK */
128 DATA( 120, 50, 100), /* COLOR_RED */
129 DATA( 240, 50, 100), /* COLOR_GREEN */
130 DATA( 180, 50, 100), /* COLOR_YELLOW */
131 DATA( 330, 50, 100), /* COLOR_BLUE */
132 DATA( 60, 50, 100), /* COLOR_MAGENTA */
133 DATA( 300, 50, 100), /* COLOR_CYAN */
134 DATA( 0, 50, 100), /* COLOR_WHITE */
135 };
136
137 #ifdef USE_TERM_DRIVER
138 NCURSES_EXPORT_VAR(const color_t*) _nc_cga_palette = cga_palette;
139 NCURSES_EXPORT_VAR(const color_t*) _nc_hls_palette = hls_palette;
140 #endif
141
142 /* *INDENT-ON* */
143
144 #if NCURSES_EXT_FUNCS
145 /*
146 * These are called from _nc_do_color(), which in turn is called from
147 * vidattr - so we have to assume that sp may be null.
148 */
149 static int
default_fg(NCURSES_SP_DCL0)150 default_fg(NCURSES_SP_DCL0)
151 {
152 return (SP_PARM != 0) ? SP_PARM->_default_fg : COLOR_WHITE;
153 }
154
155 static int
default_bg(NCURSES_SP_DCL0)156 default_bg(NCURSES_SP_DCL0)
157 {
158 return SP_PARM != 0 ? SP_PARM->_default_bg : COLOR_BLACK;
159 }
160 #else
161 #define default_fg(sp) COLOR_WHITE
162 #define default_bg(sp) COLOR_BLACK
163 #endif
164
165 #ifndef USE_TERM_DRIVER
166 /*
167 * SVr4 curses is known to interchange color codes (1,4) and (3,6), possibly
168 * to maintain compatibility with a pre-ANSI scheme. The same scheme is
169 * also used in the FreeBSD syscons.
170 */
171 static int
toggled_colors(int c)172 toggled_colors(int c)
173 {
174 if (c < 16) {
175 static const int table[] =
176 {0, 4, 2, 6, 1, 5, 3, 7,
177 8, 12, 10, 14, 9, 13, 11, 15};
178 c = table[c];
179 }
180 return c;
181 }
182 #endif
183
184 static void
set_background_color(NCURSES_SP_DCLx int bg,NCURSES_SP_OUTC outc)185 set_background_color(NCURSES_SP_DCLx int bg, NCURSES_SP_OUTC outc)
186 {
187 #ifdef USE_TERM_DRIVER
188 CallDriver_3(SP_PARM, td_color, FALSE, bg, outc);
189 #else
190 if (set_a_background) {
191 TPUTS_TRACE("set_a_background");
192 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
193 TPARM_1(set_a_background, bg),
194 1, outc);
195 } else {
196 TPUTS_TRACE("set_background");
197 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
198 TPARM_1(set_background, toggled_colors(bg)),
199 1, outc);
200 }
201 #endif
202 }
203
204 static void
set_foreground_color(NCURSES_SP_DCLx int fg,NCURSES_SP_OUTC outc)205 set_foreground_color(NCURSES_SP_DCLx int fg, NCURSES_SP_OUTC outc)
206 {
207 #ifdef USE_TERM_DRIVER
208 CallDriver_3(SP_PARM, td_color, TRUE, fg, outc);
209 #else
210 if (set_a_foreground) {
211 TPUTS_TRACE("set_a_foreground");
212 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
213 TPARM_1(set_a_foreground, fg),
214 1, outc);
215 } else {
216 TPUTS_TRACE("set_foreground");
217 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
218 TPARM_1(set_foreground, toggled_colors(fg)),
219 1, outc);
220 }
221 #endif
222 }
223
224 static void
init_color_table(NCURSES_SP_DCL0)225 init_color_table(NCURSES_SP_DCL0)
226 {
227 const color_t *tp = DefaultPalette;
228 int n;
229
230 assert(tp != 0);
231
232 for (n = 0; n < COLORS; n++) {
233 if (InPalette(n)) {
234 SP_PARM->_color_table[n] = tp[n];
235 } else {
236 SP_PARM->_color_table[n] = tp[n % MAX_PALETTE];
237 if (UseHlsPalette) {
238 SP_PARM->_color_table[n].green = 100;
239 } else {
240 if (SP_PARM->_color_table[n].red)
241 SP_PARM->_color_table[n].red = 1000;
242 if (SP_PARM->_color_table[n].green)
243 SP_PARM->_color_table[n].green = 1000;
244 if (SP_PARM->_color_table[n].blue)
245 SP_PARM->_color_table[n].blue = 1000;
246 }
247 }
248 }
249 }
250
251 static bool
init_direct_colors(NCURSES_SP_DCL0)252 init_direct_colors(NCURSES_SP_DCL0)
253 {
254 static NCURSES_CONST char name[] = "RGB";
255
256 int n;
257 const char *s;
258 int width;
259 rgb_bits_t *result = &(SP_PARM->_direct_color);
260
261 result->value = 0;
262
263 if (COLORS >= 8) {
264 /* find the number of bits needed for the maximum color value */
265 for (width = 0; (1 << width) - 1 < (COLORS - 1); ++width) {
266 ;
267 }
268
269 if ((n = tigetflag(name)) > 0) {
270 n = (width + 2) / 3;
271 result->bits.red = UChar(n);
272 result->bits.green = UChar(n);
273 result->bits.blue = UChar(width - (2 * n));
274 } else if ((n = tigetnum(name)) > 0) {
275 result->bits.red = UChar(n);
276 result->bits.green = UChar(n);
277 result->bits.blue = UChar(n);
278 } else if ((s = tigetstr(name)) != 0 && VALID_STRING(s)) {
279 int red = n;
280 int green = n;
281 int blue = width - (2 * n);
282
283 switch (sscanf(s, "%d/%d/%d", &red, &green, &blue)) {
284 default:
285 blue = width - (2 * n);
286 /* FALLTHRU */
287 case 1:
288 green = n;
289 /* FALLTHRU */
290 case 2:
291 red = n;
292 /* FALLTHRU */
293 case 3:
294 /* okay */
295 break;
296 }
297 result->bits.red = UChar(red);
298 result->bits.green = UChar(green);
299 result->bits.blue = UChar(blue);
300 }
301 }
302 return (result->value != 0);
303 }
304
305 /*
306 * Reset the color pair, e.g., to whatever color pair 0 is.
307 */
308 static bool
reset_color_pair(NCURSES_SP_DCL0)309 reset_color_pair(NCURSES_SP_DCL0)
310 {
311 #ifdef USE_TERM_DRIVER
312 return CallDriver(SP_PARM, td_rescol);
313 #else
314 bool result = FALSE;
315
316 (void) SP_PARM;
317 if (orig_pair != 0) {
318 (void) NCURSES_PUTP2("orig_pair", orig_pair);
319 result = TRUE;
320 }
321 return result;
322 #endif
323 }
324
325 /*
326 * Reset color pairs and definitions. Actually we do both more to accommodate
327 * badly-written terminal descriptions than for the relatively rare case where
328 * someone has changed the color definitions.
329 */
330 NCURSES_EXPORT(bool)
NCURSES_SP_NAME(_nc_reset_colors)331 NCURSES_SP_NAME(_nc_reset_colors) (NCURSES_SP_DCL0)
332 {
333 int result = FALSE;
334
335 T((T_CALLED("_nc_reset_colors(%p)"), (void *) SP_PARM));
336 if (SP_PARM->_color_defs > 0)
337 SP_PARM->_color_defs = -(SP_PARM->_color_defs);
338 if (reset_color_pair(NCURSES_SP_ARG))
339 result = TRUE;
340
341 #ifdef USE_TERM_DRIVER
342 result = CallDriver(SP_PARM, td_rescolors);
343 #else
344 if (orig_colors != 0) {
345 NCURSES_PUTP2("orig_colors", orig_colors);
346 result = TRUE;
347 }
348 #endif
349 returnBool(result);
350 }
351
352 #if NCURSES_SP_FUNCS
353 NCURSES_EXPORT(bool)
_nc_reset_colors(void)354 _nc_reset_colors(void)
355 {
356 return NCURSES_SP_NAME(_nc_reset_colors) (CURRENT_SCREEN);
357 }
358 #endif
359
360 NCURSES_EXPORT(int)
NCURSES_SP_NAME(start_color)361 NCURSES_SP_NAME(start_color) (NCURSES_SP_DCL0)
362 {
363 int result = ERR;
364 int maxpairs = 0, maxcolors = 0;
365
366 T((T_CALLED("start_color(%p)"), (void *) SP_PARM));
367
368 if (SP_PARM == 0) {
369 result = ERR;
370 } else if (SP_PARM->_coloron) {
371 result = OK;
372 } else {
373 maxpairs = MaxPairs;
374 maxcolors = MaxColors;
375 if (reset_color_pair(NCURSES_SP_ARG) != TRUE) {
376 set_foreground_color(NCURSES_SP_ARGx
377 default_fg(NCURSES_SP_ARG),
378 NCURSES_SP_NAME(_nc_outch));
379 set_background_color(NCURSES_SP_ARGx
380 default_bg(NCURSES_SP_ARG),
381 NCURSES_SP_NAME(_nc_outch));
382 }
383 #if !NCURSES_EXT_COLORS
384 /*
385 * Without ext-colors, we cannot represent more than 256 color pairs.
386 */
387 if (maxpairs > 256)
388 maxpairs = 256;
389 #endif
390
391 if (maxpairs > 0 && maxcolors > 0) {
392 SP_PARM->_pair_limit = maxpairs;
393
394 #if NCURSES_EXT_FUNCS
395 /*
396 * If using default colors, allocate extra space in table to
397 * allow for default-color as a component of a color-pair.
398 */
399 SP_PARM->_pair_limit += (1 + (2 * maxcolors));
400 #if !NCURSES_EXT_COLORS
401 SP_PARM->_pair_limit = limit_PAIRS(SP_PARM->_pair_limit);
402 #endif
403 #endif /* NCURSES_EXT_FUNCS */
404 SP_PARM->_pair_count = maxpairs;
405 SP_PARM->_color_count = maxcolors;
406 #if !USE_REENTRANT
407 COLOR_PAIRS = maxpairs;
408 COLORS = maxcolors;
409 #endif
410
411 ReservePairs(SP_PARM, 16);
412 if (SP_PARM->_color_pairs != 0) {
413 if (init_direct_colors(NCURSES_SP_ARG)) {
414 result = OK;
415 } else {
416 SP_PARM->_color_table = TYPE_CALLOC(color_t, maxcolors);
417 if (SP_PARM->_color_table != 0) {
418 MakeColorPair(SP_PARM->_color_pairs[0],
419 default_fg(NCURSES_SP_ARG),
420 default_bg(NCURSES_SP_ARG));
421 init_color_table(NCURSES_SP_ARG);
422
423 result = OK;
424 }
425 }
426 if (result == OK) {
427 T(("started color: COLORS = %d, COLOR_PAIRS = %d",
428 COLORS, COLOR_PAIRS));
429
430 SP_PARM->_coloron = 1;
431 } else if (SP_PARM->_color_pairs != 0) {
432 FreeAndNull(SP_PARM->_color_pairs);
433 }
434 }
435 } else {
436 result = OK;
437 }
438 }
439 returnCode(result);
440 }
441
442 #if NCURSES_SP_FUNCS
443 NCURSES_EXPORT(int)
start_color(void)444 start_color(void)
445 {
446 return NCURSES_SP_NAME(start_color) (CURRENT_SCREEN);
447 }
448 #endif
449
450 /* This function was originally written by Daniel Weaver <danw@znyx.com> */
451 static void
rgb2hls(int r,int g,int b,int * h,int * l,int * s)452 rgb2hls(int r, int g, int b, int *h, int *l, int *s)
453 /* convert RGB to HLS system */
454 {
455 int min, max, t;
456
457 if ((min = g < r ? g : r) > b)
458 min = b;
459 if ((max = g > r ? g : r) < b)
460 max = b;
461
462 /* calculate lightness */
463 *l = ((min + max) / 20);
464
465 if (min == max) { /* black, white and all shades of gray */
466 *h = 0;
467 *s = 0;
468 return;
469 }
470
471 /* calculate saturation */
472 if (*l < 50)
473 *s = (((max - min) * 100) / (max + min));
474 else
475 *s = (((max - min) * 100) / (2000 - max - min));
476
477 /* calculate hue */
478 if (r == max)
479 t = (120 + ((g - b) * 60) / (max - min));
480 else if (g == max)
481 t = (240 + ((b - r) * 60) / (max - min));
482 else
483 t = (360 + ((r - g) * 60) / (max - min));
484
485 *h = (t % 360);
486 }
487
488 /*
489 * Change all cells which use(d) a given color pair to force a repaint.
490 */
491 NCURSES_EXPORT(void)
_nc_change_pair(SCREEN * sp,int pair)492 _nc_change_pair(SCREEN *sp, int pair)
493 {
494 int y, x;
495
496 if (CurScreen(sp)->_clear)
497 return;
498 #if NO_LEAKS
499 if (_nc_globals.leak_checking)
500 return;
501 #endif
502
503 for (y = 0; y <= CurScreen(sp)->_maxy; y++) {
504 struct ldat *ptr = &(CurScreen(sp)->_line[y]);
505 bool changed = FALSE;
506 for (x = 0; x <= CurScreen(sp)->_maxx; x++) {
507 if (GetPair(ptr->text[x]) == pair) {
508 /* Set the old cell to zero to ensure it will be
509 updated on the next doupdate() */
510 SetChar(ptr->text[x], 0, 0);
511 CHANGED_CELL(ptr, x);
512 changed = TRUE;
513 }
514 }
515 if (changed)
516 NCURSES_SP_NAME(_nc_make_oldhash) (NCURSES_SP_ARGx y);
517 }
518 }
519
520 NCURSES_EXPORT(void)
_nc_reserve_pairs(SCREEN * sp,int want)521 _nc_reserve_pairs(SCREEN *sp, int want)
522 {
523 int have = sp->_pair_alloc;
524
525 if (have == 0)
526 have = 1;
527 while (have <= want)
528 have *= 2;
529 if (have > sp->_pair_limit)
530 have = sp->_pair_limit;
531
532 if (sp->_color_pairs == 0) {
533 sp->_color_pairs = TYPE_CALLOC(colorpair_t, have);
534 } else if (have > sp->_pair_alloc) {
535 #if NCURSES_EXT_COLORS
536 colorpair_t *next;
537
538 if ((next = typeCalloc(colorpair_t, have)) == 0)
539 _nc_err_abort(MSG_NO_MEMORY);
540 memcpy(next, sp->_color_pairs, (size_t) sp->_pair_alloc * sizeof(*next));
541 _nc_copy_pairs(sp, next, sp->_color_pairs, sp->_pair_alloc);
542 free(sp->_color_pairs);
543 sp->_color_pairs = next;
544 #else
545 TYPE_REALLOC(colorpair_t, have, sp->_color_pairs);
546 if (sp->_color_pairs != 0) {
547 memset(sp->_color_pairs + sp->_pair_alloc, 0,
548 sizeof(colorpair_t) * (size_t) (have - sp->_pair_alloc));
549 }
550 #endif
551 }
552 if (sp->_color_pairs != 0) {
553 sp->_pair_alloc = have;
554 }
555 }
556
557 /*
558 * Extension (1997/1/18) - Allow negative f/b values to set default color
559 * values.
560 */
561 NCURSES_EXPORT(int)
_nc_init_pair(SCREEN * sp,int pair,int f,int b)562 _nc_init_pair(SCREEN *sp, int pair, int f, int b)
563 {
564 static colorpair_t null_pair;
565 colorpair_t result = null_pair;
566 colorpair_t previous;
567 int maxcolors;
568
569 T((T_CALLED("init_pair(%p,%d,%d,%d)"), (void *) sp, pair, f, b));
570
571 if (!ValidPair(sp, pair))
572 returnCode(ERR);
573
574 maxcolors = MaxColors;
575
576 ReservePairs(sp, pair);
577 previous = sp->_color_pairs[pair];
578 #if NCURSES_EXT_FUNCS
579 if (sp->_default_color || sp->_assumed_color) {
580 bool isDefault = FALSE;
581 bool wasDefault = FALSE;
582 int default_pairs = sp->_default_pairs;
583
584 /*
585 * Map caller's color number, e.g., -1, 0, 1, .., 7, etc., into
586 * internal unsigned values which we will store in the _color_pairs[]
587 * table.
588 */
589 if (isDefaultColor(f)) {
590 f = COLOR_DEFAULT;
591 isDefault = TRUE;
592 } else if (!OkColorHi(f)) {
593 returnCode(ERR);
594 }
595
596 if (isDefaultColor(b)) {
597 b = COLOR_DEFAULT;
598 isDefault = TRUE;
599 } else if (!OkColorHi(b)) {
600 returnCode(ERR);
601 }
602
603 /*
604 * Check if the table entry that we are going to init/update used
605 * default colors.
606 */
607 if (isDefaultColor(FORE_OF(previous))
608 || isDefaultColor(BACK_OF(previous)))
609 wasDefault = TRUE;
610
611 /*
612 * Keep track of the number of entries in the color pair table which
613 * used a default color.
614 */
615 if (isDefault && !wasDefault) {
616 ++default_pairs;
617 } else if (wasDefault && !isDefault) {
618 --default_pairs;
619 }
620
621 /*
622 * As an extension, ncurses allows the pair number to exceed the
623 * terminal's color_pairs value for pairs using a default color.
624 *
625 * Note that updating a pair which used a default color with one
626 * that does not will decrement the count - and possibly interfere
627 * with sequentially adding new pairs.
628 */
629 if (pair > (sp->_pair_count + default_pairs)) {
630 returnCode(ERR);
631 }
632 sp->_default_pairs = default_pairs;
633 } else
634 #endif
635 {
636 if ((f < 0) || !OkColorHi(f)
637 || (b < 0) || !OkColorHi(b)
638 || (pair < 1)) {
639 returnCode(ERR);
640 }
641 }
642
643 /*
644 * When a pair's content is changed, replace its colors (if pair was
645 * initialized before a screen update is performed replacing original
646 * pair colors with the new ones).
647 */
648 MakeColorPair(result, f, b);
649 if ((FORE_OF(previous) != 0
650 || BACK_OF(previous) != 0)
651 && !isSamePair(previous, result)) {
652 _nc_change_pair(sp, pair);
653 }
654
655 _nc_reset_color_pair(sp, pair, &result);
656 sp->_color_pairs[pair] = result;
657 _nc_set_color_pair(sp, pair, cpINIT);
658
659 if (GET_SCREEN_PAIR(sp) == pair)
660 SET_SCREEN_PAIR(sp, (int) (~0)); /* force attribute update */
661
662 #ifdef USE_TERM_DRIVER
663 CallDriver_3(sp, td_initpair, pair, f, b);
664 #else
665 if (initialize_pair && InPalette(f) && InPalette(b)) {
666 const color_t *tp = DefaultPalette;
667
668 TR(TRACE_ATTRS,
669 ("initializing pair: pair = %d, fg=(%d,%d,%d), bg=(%d,%d,%d)",
670 (int) pair,
671 (int) tp[f].red, (int) tp[f].green, (int) tp[f].blue,
672 (int) tp[b].red, (int) tp[b].green, (int) tp[b].blue));
673
674 NCURSES_PUTP2("initialize_pair",
675 TPARM_7(initialize_pair,
676 pair,
677 (int) tp[f].red,
678 (int) tp[f].green,
679 (int) tp[f].blue,
680 (int) tp[b].red,
681 (int) tp[b].green,
682 (int) tp[b].blue));
683 }
684 #endif
685
686 returnCode(OK);
687 }
688
689 NCURSES_EXPORT(int)
NCURSES_SP_NAME(init_pair)690 NCURSES_SP_NAME(init_pair) (NCURSES_SP_DCLx
691 NCURSES_PAIRS_T pair,
692 NCURSES_COLOR_T f,
693 NCURSES_COLOR_T b)
694 {
695 return _nc_init_pair(SP_PARM, pair, f, b);
696 }
697
698 #if NCURSES_SP_FUNCS
699 NCURSES_EXPORT(int)
init_pair(NCURSES_COLOR_T pair,NCURSES_COLOR_T f,NCURSES_COLOR_T b)700 init_pair(NCURSES_COLOR_T pair, NCURSES_COLOR_T f, NCURSES_COLOR_T b)
701 {
702 return NCURSES_SP_NAME(init_pair) (CURRENT_SCREEN, pair, f, b);
703 }
704 #endif
705
706 #define okRGB(n) ((n) >= 0 && (n) <= 1000)
707
708 NCURSES_EXPORT(int)
_nc_init_color(SCREEN * sp,int color,int r,int g,int b)709 _nc_init_color(SCREEN *sp, int color, int r, int g, int b)
710 {
711 int result = ERR;
712 int maxcolors;
713
714 T((T_CALLED("init_color(%p,%d,%d,%d,%d)"),
715 (void *) sp,
716 color,
717 r, g, b));
718
719 if (sp == 0 || sp->_direct_color.value)
720 returnCode(result);
721
722 maxcolors = MaxColors;
723
724 if (InitColor
725 && sp->_coloron
726 && (color >= 0 && OkColorHi(color))
727 && (okRGB(r) && okRGB(g) && okRGB(b))) {
728
729 sp->_color_table[color].init = 1;
730 sp->_color_table[color].r = r;
731 sp->_color_table[color].g = g;
732 sp->_color_table[color].b = b;
733
734 if (UseHlsPalette) {
735 rgb2hls(r, g, b,
736 &sp->_color_table[color].red,
737 &sp->_color_table[color].green,
738 &sp->_color_table[color].blue);
739 } else {
740 sp->_color_table[color].red = r;
741 sp->_color_table[color].green = g;
742 sp->_color_table[color].blue = b;
743 }
744
745 #ifdef USE_TERM_DRIVER
746 CallDriver_4(sp, td_initcolor, color, r, g, b);
747 #else
748 NCURSES_PUTP2("initialize_color",
749 TPARM_4(initialize_color, color, r, g, b));
750 #endif
751 sp->_color_defs = max(color + 1, sp->_color_defs);
752
753 result = OK;
754 }
755 returnCode(result);
756 }
757
758 NCURSES_EXPORT(int)
NCURSES_SP_NAME(init_color)759 NCURSES_SP_NAME(init_color) (NCURSES_SP_DCLx
760 NCURSES_COLOR_T color,
761 NCURSES_COLOR_T r,
762 NCURSES_COLOR_T g,
763 NCURSES_COLOR_T b)
764 {
765 return _nc_init_color(SP_PARM, color, r, g, b);
766 }
767
768 #if NCURSES_SP_FUNCS
769 NCURSES_EXPORT(int)
init_color(NCURSES_COLOR_T color,NCURSES_COLOR_T r,NCURSES_COLOR_T g,NCURSES_COLOR_T b)770 init_color(NCURSES_COLOR_T color,
771 NCURSES_COLOR_T r,
772 NCURSES_COLOR_T g,
773 NCURSES_COLOR_T b)
774 {
775 return NCURSES_SP_NAME(init_color) (CURRENT_SCREEN, color, r, g, b);
776 }
777 #endif
778
779 NCURSES_EXPORT(bool)
NCURSES_SP_NAME(can_change_color)780 NCURSES_SP_NAME(can_change_color) (NCURSES_SP_DCL)
781 {
782 int result = FALSE;
783
784 T((T_CALLED("can_change_color(%p)"), (void *) SP_PARM));
785
786 if (HasTerminal(SP_PARM) && (CanChange != 0)) {
787 result = TRUE;
788 }
789
790 returnCode(result);
791 }
792
793 #if NCURSES_SP_FUNCS
794 NCURSES_EXPORT(bool)
can_change_color(void)795 can_change_color(void)
796 {
797 return NCURSES_SP_NAME(can_change_color) (CURRENT_SCREEN);
798 }
799 #endif
800
801 NCURSES_EXPORT(bool)
NCURSES_SP_NAME(has_colors)802 NCURSES_SP_NAME(has_colors) (NCURSES_SP_DCL0)
803 {
804 int code = FALSE;
805
806 (void) SP_PARM;
807 T((T_CALLED("has_colors(%p)"), (void *) SP_PARM));
808 if (HasTerminal(SP_PARM)) {
809 #ifdef USE_TERM_DRIVER
810 code = HasColor;
811 #else
812 code = ((VALID_NUMERIC(max_colors) && VALID_NUMERIC(max_pairs)
813 && (((set_foreground != NULL)
814 && (set_background != NULL))
815 || ((set_a_foreground != NULL)
816 && (set_a_background != NULL))
817 || set_color_pair)) ? TRUE : FALSE);
818 #endif
819 }
820 returnCode(code);
821 }
822
823 #if NCURSES_SP_FUNCS
824 NCURSES_EXPORT(bool)
has_colors(void)825 has_colors(void)
826 {
827 return NCURSES_SP_NAME(has_colors) (CURRENT_SCREEN);
828 }
829 #endif
830
831 static int
_nc_color_content(SCREEN * sp,int color,int * r,int * g,int * b)832 _nc_color_content(SCREEN *sp, int color, int *r, int *g, int *b)
833 {
834 int result = ERR;
835 int maxcolors;
836
837 T((T_CALLED("color_content(%p,%d,%p,%p,%p)"),
838 (void *) sp,
839 color,
840 (void *) r,
841 (void *) g,
842 (void *) b));
843
844 if (sp == 0)
845 returnCode(result);
846
847 maxcolors = MaxColors;
848
849 if (color < 0 || !OkColorHi(color) || !sp->_coloron) {
850 result = ERR;
851 } else {
852 int c_r, c_g, c_b;
853
854 if (sp->_direct_color.value) {
855 rgb_bits_t *work = &(sp->_direct_color);
856
857 #define max_direct_color(name) ((1 << work->bits.name) - 1)
858 #define value_direct_color(max) (1000 * ((color >> bitoff) & max)) / max
859
860 int max_r = max_direct_color(red);
861 int max_g = max_direct_color(green);
862 int max_b = max_direct_color(blue);
863
864 int bitoff = 0;
865
866 c_b = value_direct_color(max_b);
867 bitoff += work->bits.blue;
868
869 c_g = value_direct_color(max_g);
870 bitoff += work->bits.green;
871
872 c_r = value_direct_color(max_r);
873
874 } else {
875 c_r = sp->_color_table[color].red;
876 c_g = sp->_color_table[color].green;
877 c_b = sp->_color_table[color].blue;
878 }
879
880 if (r)
881 *r = c_r;
882 if (g)
883 *g = c_g;
884 if (b)
885 *b = c_b;
886
887 TR(TRACE_ATTRS, ("...color_content(%d,%d,%d,%d)",
888 color, c_r, c_g, c_b));
889 result = OK;
890 }
891 returnCode(result);
892 }
893
894 NCURSES_EXPORT(int)
NCURSES_SP_NAME(color_content)895 NCURSES_SP_NAME(color_content) (NCURSES_SP_DCLx
896 NCURSES_COLOR_T color,
897 NCURSES_COLOR_T *r,
898 NCURSES_COLOR_T *g,
899 NCURSES_COLOR_T *b)
900 {
901 int my_r, my_g, my_b;
902 int rc = _nc_color_content(SP_PARM, color, &my_r, &my_g, &my_b);
903 if (rc == OK) {
904 *r = limit_COLOR(my_r);
905 *g = limit_COLOR(my_g);
906 *b = limit_COLOR(my_b);
907 }
908 return rc;
909 }
910
911 #if NCURSES_SP_FUNCS
912 NCURSES_EXPORT(int)
color_content(NCURSES_COLOR_T color,NCURSES_COLOR_T * r,NCURSES_COLOR_T * g,NCURSES_COLOR_T * b)913 color_content(NCURSES_COLOR_T color,
914 NCURSES_COLOR_T *r,
915 NCURSES_COLOR_T *g,
916 NCURSES_COLOR_T *b)
917 {
918 return NCURSES_SP_NAME(color_content) (CURRENT_SCREEN, color, r, g, b);
919 }
920 #endif
921
922 NCURSES_EXPORT(int)
_nc_pair_content(SCREEN * sp,int pair,int * f,int * b)923 _nc_pair_content(SCREEN *sp, int pair, int *f, int *b)
924 {
925 int result;
926
927 T((T_CALLED("pair_content(%p,%d,%p,%p)"),
928 (void *) sp,
929 (int) pair,
930 (void *) f,
931 (void *) b));
932
933 if (!ValidPair(sp, pair)) {
934 result = ERR;
935 } else {
936 int fg;
937 int bg;
938
939 ReservePairs(sp, pair);
940 fg = FORE_OF(sp->_color_pairs[pair]);
941 bg = BACK_OF(sp->_color_pairs[pair]);
942 #if NCURSES_EXT_FUNCS
943 if (isDefaultColor(fg))
944 fg = -1;
945 if (isDefaultColor(bg))
946 bg = -1;
947 #endif
948
949 if (f)
950 *f = fg;
951 if (b)
952 *b = bg;
953
954 TR(TRACE_ATTRS, ("...pair_content(%p,%d,%d,%d)",
955 (void *) sp,
956 (int) pair,
957 (int) fg, (int) bg));
958 result = OK;
959 }
960 returnCode(result);
961 }
962
963 NCURSES_EXPORT(int)
NCURSES_SP_NAME(pair_content)964 NCURSES_SP_NAME(pair_content) (NCURSES_SP_DCLx
965 NCURSES_PAIRS_T pair,
966 NCURSES_COLOR_T *f,
967 NCURSES_COLOR_T *b)
968 {
969 int my_f, my_b;
970 int rc = _nc_pair_content(SP_PARM, pair, &my_f, &my_b);
971 if (rc == OK) {
972 *f = limit_COLOR(my_f);
973 *b = limit_COLOR(my_b);
974 }
975 return rc;
976 }
977
978 #if NCURSES_SP_FUNCS
979 NCURSES_EXPORT(int)
pair_content(NCURSES_COLOR_T pair,NCURSES_COLOR_T * f,NCURSES_COLOR_T * b)980 pair_content(NCURSES_COLOR_T pair, NCURSES_COLOR_T *f, NCURSES_COLOR_T *b)
981 {
982 return NCURSES_SP_NAME(pair_content) (CURRENT_SCREEN, pair, f, b);
983 }
984 #endif
985
986 NCURSES_EXPORT(void)
NCURSES_SP_NAME(_nc_do_color)987 NCURSES_SP_NAME(_nc_do_color) (NCURSES_SP_DCLx
988 int old_pair,
989 int pair,
990 int reverse,
991 NCURSES_SP_OUTC outc)
992 {
993 #ifdef USE_TERM_DRIVER
994 CallDriver_4(SP_PARM, td_docolor, old_pair, pair, reverse, outc);
995 #else
996 int fg = COLOR_DEFAULT;
997 int bg = COLOR_DEFAULT;
998 int old_fg = -1;
999 int old_bg = -1;
1000
1001 if (!ValidPair(SP_PARM, pair)) {
1002 return;
1003 } else if (pair != 0) {
1004 if (set_color_pair) {
1005 TPUTS_TRACE("set_color_pair");
1006 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
1007 TPARM_1(set_color_pair, pair),
1008 1, outc);
1009 return;
1010 } else if (SP_PARM != 0) {
1011 if (_nc_pair_content(SP_PARM, pair, &fg, &bg) == ERR)
1012 return;
1013 }
1014 }
1015
1016 if (old_pair >= 0
1017 && SP_PARM != 0
1018 && _nc_pair_content(SP_PARM, old_pair, &old_fg, &old_bg) != ERR) {
1019 if ((isDefaultColor(fg) && !isDefaultColor(old_fg))
1020 || (isDefaultColor(bg) && !isDefaultColor(old_bg))) {
1021 #if NCURSES_EXT_FUNCS
1022 /*
1023 * A minor optimization - but extension. If "AX" is specified in
1024 * the terminal description, treat it as screen's indicator of ECMA
1025 * SGR 39 and SGR 49, and assume the two sequences are independent.
1026 */
1027 if (SP_PARM->_has_sgr_39_49
1028 && isDefaultColor(old_bg)
1029 && !isDefaultColor(old_fg)) {
1030 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx "\033[39m", 1, outc);
1031 } else if (SP_PARM->_has_sgr_39_49
1032 && isDefaultColor(old_fg)
1033 && !isDefaultColor(old_bg)) {
1034 NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx "\033[49m", 1, outc);
1035 } else
1036 #endif
1037 reset_color_pair(NCURSES_SP_ARG);
1038 }
1039 } else {
1040 reset_color_pair(NCURSES_SP_ARG);
1041 if (old_pair < 0 && pair <= 0)
1042 return;
1043 }
1044
1045 #if NCURSES_EXT_FUNCS
1046 if (isDefaultColor(fg))
1047 fg = default_fg(NCURSES_SP_ARG);
1048 if (isDefaultColor(bg))
1049 bg = default_bg(NCURSES_SP_ARG);
1050 #endif
1051
1052 if (reverse) {
1053 int xx = fg;
1054 fg = bg;
1055 bg = xx;
1056 }
1057
1058 TR(TRACE_ATTRS, ("setting colors: pair = %d, fg = %d, bg = %d", pair,
1059 fg, bg));
1060
1061 if (!isDefaultColor(fg)) {
1062 set_foreground_color(NCURSES_SP_ARGx fg, outc);
1063 }
1064 if (!isDefaultColor(bg)) {
1065 set_background_color(NCURSES_SP_ARGx bg, outc);
1066 }
1067 #endif
1068 }
1069
1070 #if NCURSES_SP_FUNCS
1071 NCURSES_EXPORT(void)
_nc_do_color(int old_pair,int pair,int reverse,NCURSES_OUTC outc)1072 _nc_do_color(int old_pair, int pair, int reverse, NCURSES_OUTC outc)
1073 {
1074 SetSafeOutcWrapper(outc);
1075 NCURSES_SP_NAME(_nc_do_color) (CURRENT_SCREEN,
1076 old_pair,
1077 pair,
1078 reverse,
1079 _nc_outc_wrapper);
1080 }
1081 #endif
1082
1083 #if NCURSES_EXT_COLORS
1084 NCURSES_EXPORT(int)
NCURSES_SP_NAME(init_extended_pair)1085 NCURSES_SP_NAME(init_extended_pair) (NCURSES_SP_DCLx int pair, int f, int b)
1086 {
1087 return _nc_init_pair(SP_PARM, pair, f, b);
1088 }
1089
1090 NCURSES_EXPORT(int)
NCURSES_SP_NAME(init_extended_color)1091 NCURSES_SP_NAME(init_extended_color) (NCURSES_SP_DCLx
1092 int color,
1093 int r, int g, int b)
1094 {
1095 return _nc_init_color(SP_PARM, color, r, g, b);
1096 }
1097
1098 NCURSES_EXPORT(int)
NCURSES_SP_NAME(extended_color_content)1099 NCURSES_SP_NAME(extended_color_content) (NCURSES_SP_DCLx
1100 int color,
1101 int *r, int *g, int *b)
1102 {
1103 return _nc_color_content(SP_PARM, color, r, g, b);
1104 }
1105
1106 NCURSES_EXPORT(int)
NCURSES_SP_NAME(extended_pair_content)1107 NCURSES_SP_NAME(extended_pair_content) (NCURSES_SP_DCLx
1108 int pair,
1109 int *f, int *b)
1110 {
1111 return _nc_pair_content(SP_PARM, pair, f, b);
1112 }
1113
1114 NCURSES_EXPORT(void)
NCURSES_SP_NAME(reset_color_pairs)1115 NCURSES_SP_NAME(reset_color_pairs) (NCURSES_SP_DCL0)
1116 {
1117 if (SP_PARM != 0) {
1118 if (SP_PARM->_color_pairs) {
1119 _nc_free_ordered_pairs(SP_PARM);
1120 free(SP_PARM->_color_pairs);
1121 SP_PARM->_color_pairs = 0;
1122 SP_PARM->_pair_alloc = 0;
1123 ReservePairs(SP_PARM, 16);
1124 clearok(CurScreen(SP_PARM), TRUE);
1125 touchwin(StdScreen(SP_PARM));
1126 }
1127 }
1128 }
1129
1130 #if NCURSES_SP_FUNCS
1131 NCURSES_EXPORT(int)
init_extended_pair(int pair,int f,int b)1132 init_extended_pair(int pair, int f, int b)
1133 {
1134 return NCURSES_SP_NAME(init_extended_pair) (CURRENT_SCREEN, pair, f, b);
1135 }
1136
1137 NCURSES_EXPORT(int)
init_extended_color(int color,int r,int g,int b)1138 init_extended_color(int color, int r, int g, int b)
1139 {
1140 return NCURSES_SP_NAME(init_extended_color) (CURRENT_SCREEN,
1141 color,
1142 r, g, b);
1143 }
1144
1145 NCURSES_EXPORT(int)
extended_color_content(int color,int * r,int * g,int * b)1146 extended_color_content(int color, int *r, int *g, int *b)
1147 {
1148 return NCURSES_SP_NAME(extended_color_content) (CURRENT_SCREEN,
1149 color,
1150 r, g, b);
1151 }
1152
1153 NCURSES_EXPORT(int)
extended_pair_content(int pair,int * f,int * b)1154 extended_pair_content(int pair, int *f, int *b)
1155 {
1156 return NCURSES_SP_NAME(extended_pair_content) (CURRENT_SCREEN, pair, f, b);
1157 }
1158
1159 NCURSES_EXPORT(void)
reset_color_pairs(void)1160 reset_color_pairs(void)
1161 {
1162 NCURSES_SP_NAME(reset_color_pairs) (CURRENT_SCREEN);
1163 }
1164 #endif /* NCURSES_SP_FUNCS */
1165 #endif /* NCURSES_EXT_COLORS */
1166