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Added pow() forward.
[wine.git] / graphics / x11drv / palette.c
blobfb7770005f3951b250c8b36ae677dea27d1a49df
1 /*
2 * X11DRV OEM bitmap objects
3 *
4 * Copyright 1994, 1995 Alexandre Julliard
5 *
6 */
7
8 #include "config.h"
9
10 #include "ts_xlib.h"
11
12 #include <stdlib.h>
13 #include <string.h>
14
15 #include "color.h"
16 #include "debugtools.h"
17 #include "gdi.h"
18 #include "options.h"
19 #include "palette.h"
20 #include "windef.h"
21 #include "x11drv.h"
22
23 DEFAULT_DEBUG_CHANNEL(palette);
24
25 /* Palette indexed mode:
26 * logical palette -> mapping -> pixel
27 *
28 *
29 * Windows needs contiguous color space ( from 0 to n ) but
30 * it is possible only with the private colormap. Otherwise we
31 * have to map DC palette indices to real pixel values. With
32 * private colormaps it boils down to the identity mapping. The
33 * other special case is when we have a fixed color visual with
34 * the screendepth > 8 - we abandon palette mappings altogether
35 * because pixel values can be calculated without X server
36 * assistance.
37 *
38 * Windows palette manager is described in the
39 * http://premium.microsoft.com/msdn/library/techart/f30/f34/f40/d4d/sa942.htm
40 */
41
42 extern PALETTEENTRY *COLOR_sysPal;
43 extern int COLOR_gapStart;
44 extern int COLOR_gapEnd;
45 extern int COLOR_gapFilled;
46 extern int COLOR_max;
47
48 extern const PALETTEENTRY COLOR_sysPalTemplate[NB_RESERVED_COLORS];
49
50 Colormap X11DRV_PALETTE_PaletteXColormap = 0;
51 UINT16 X11DRV_PALETTE_PaletteFlags = 0;
52
53 static int X11DRV_PALETTE_Redshift = 0; /* to handle abortive X11DRV_PALETTE_VIRTUAL visuals */
54 static int X11DRV_PALETTE_Redmax = 0;
55 static int X11DRV_PALETTE_Greenshift = 0;
56 static int X11DRV_PALETTE_Greenmax = 0;
57 static int X11DRV_PALETTE_Blueshift = 0;
58 static int X11DRV_PALETTE_Bluemax = 0;
59 static int X11DRV_PALETTE_Graymax = 0;
60
61 /* First free dynamic color cell, 0 = full palette, -1 = fixed palette */
62 static int X11DRV_PALETTE_firstFree = 0;
63 static unsigned char X11DRV_PALETTE_freeList[256];
64
65 /**********************************************************************/
66
67 /* Map an EGA index (0..15) to a pixel value in the system color space. */
68
69 int X11DRV_PALETTE_mapEGAPixel[16];
70
71 /**********************************************************************/
72
73 #define NB_COLORCUBE_START_INDEX 63
74
75 /* Maps entry in the system palette to X pixel value */
76 int *X11DRV_PALETTE_PaletteToXPixel = NULL;
77
78 /* Maps pixel to the entry in the system palette */
79 int *X11DRV_PALETTE_XPixelToPalette = NULL;
80
81 /**********************************************************************/
82
83 static BOOL X11DRV_PALETTE_BuildPrivateMap(void);
84 static BOOL X11DRV_PALETTE_BuildSharedMap(void);
85 static void X11DRV_PALETTE_ComputeShifts(unsigned long maskbits, int *shift, int *max);
86 static void X11DRV_PALETTE_FillDefaultColors(void);
87 static void X11DRV_PALETTE_FormatSystemPalette(void);
88 static BOOL X11DRV_PALETTE_CheckSysColor(COLORREF c);
89 static int X11DRV_PALETTE_LookupSystemXPixel(COLORREF col);
90
91 /***********************************************************************
92 * COLOR_Init
93 *
94 * Initialize color management.
95 */
96 BOOL X11DRV_PALETTE_Init(void)
97 {
98 int mask, white, black;
99 int monoPlane;
100
101 Visual *visual = X11DRV_GetVisual();
102
103 TRACE("initializing palette manager...\n");
104
105 white = WhitePixelOfScreen( X11DRV_GetXScreen() );
106 black = BlackPixelOfScreen( X11DRV_GetXScreen() );
107 monoPlane = 1;
108 for( mask = 1; !((white & mask)^(black & mask)); mask <<= 1 )
109 monoPlane++;
110 X11DRV_PALETTE_PaletteFlags = (white & mask) ? X11DRV_PALETTE_WHITESET : 0;
111 X11DRV_DevCaps.sizePalette = visual->map_entries;
112
113 switch(visual->class)
114 {
115 case DirectColor:
116 X11DRV_PALETTE_PaletteFlags |= X11DRV_PALETTE_VIRTUAL;
117 case GrayScale:
118 case PseudoColor:
119 if (PROFILE_GetWineIniBool( "x11drv", "PrivateColorMap", 0 ))
120 {
121 XSetWindowAttributes win_attr;
122
123 X11DRV_PALETTE_PaletteXColormap = TSXCreateColormap( display, X11DRV_GetXRootWindow(),
124 visual, AllocAll );
125 if (X11DRV_PALETTE_PaletteXColormap)
126 {
127 X11DRV_PALETTE_PaletteFlags |= (X11DRV_PALETTE_PRIVATE | X11DRV_PALETTE_WHITESET);
128
129 monoPlane = 1;
130 for( white = X11DRV_DevCaps.sizePalette - 1; !(white & 1); white >>= 1 )
131 monoPlane++;
132
133 if( X11DRV_GetXRootWindow() != DefaultRootWindow(display) )
134 {
135 win_attr.colormap = X11DRV_PALETTE_PaletteXColormap;
136 TSXChangeWindowAttributes( display, X11DRV_GetXRootWindow(),
137 CWColormap, &win_attr );
138 }
139 break;
140 }
141 }
142 X11DRV_PALETTE_PaletteXColormap = DefaultColormapOfScreen( X11DRV_GetXScreen() );
143 break;
144
145 case StaticGray:
146 X11DRV_PALETTE_PaletteXColormap = DefaultColormapOfScreen( X11DRV_GetXScreen() );
147 X11DRV_PALETTE_PaletteFlags |= X11DRV_PALETTE_FIXED;
148 X11DRV_PALETTE_Graymax = (1 << X11DRV_GetDepth())-1;
149 break;
150
151 case TrueColor:
152 X11DRV_PALETTE_PaletteFlags |= X11DRV_PALETTE_VIRTUAL;
153 case StaticColor: {
154 int *depths,nrofdepths;
155 /* FIXME: hack to detect XFree32 XF_VGA16 ... We just have
156 * depths 1 and 4
157 */
158 depths=TSXListDepths(display,DefaultScreen(display),&nrofdepths);
159 if ((nrofdepths==2) && ((depths[0]==4) || depths[1]==4)) {
160 monoPlane = 1;
161 for( white = X11DRV_DevCaps.sizePalette - 1; !(white & 1); white >>= 1 )
162 monoPlane++;
163 X11DRV_PALETTE_PaletteFlags = (white & mask) ? X11DRV_PALETTE_WHITESET : 0;
164 X11DRV_PALETTE_PaletteXColormap = DefaultColormapOfScreen( X11DRV_GetXScreen() );
165 TSXFree(depths);
166 break;
167 }
168 TSXFree(depths);
169 X11DRV_PALETTE_PaletteXColormap = DefaultColormapOfScreen( X11DRV_GetXScreen() );
170 X11DRV_PALETTE_PaletteFlags |= X11DRV_PALETTE_FIXED;
171 X11DRV_PALETTE_ComputeShifts(visual->red_mask, &X11DRV_PALETTE_Redshift, &X11DRV_PALETTE_Redmax);
172 X11DRV_PALETTE_ComputeShifts(visual->green_mask, &X11DRV_PALETTE_Greenshift, &X11DRV_PALETTE_Greenmax);
173 X11DRV_PALETTE_ComputeShifts(visual->blue_mask, &X11DRV_PALETTE_Blueshift, &X11DRV_PALETTE_Bluemax);
174 break;
175 }
176 }
177
178 TRACE(" visual class %i (%i)\n", visual->class, monoPlane);
179
180 memset(X11DRV_PALETTE_freeList, 0, 256*sizeof(unsigned char));
181
182 if (X11DRV_PALETTE_PaletteFlags & X11DRV_PALETTE_PRIVATE)
183 X11DRV_PALETTE_BuildPrivateMap();
184 else
185 X11DRV_PALETTE_BuildSharedMap();
186
187 /* Build free list */
188
189 if( X11DRV_PALETTE_firstFree != -1 )
190 X11DRV_PALETTE_FormatSystemPalette();
191
192 X11DRV_PALETTE_FillDefaultColors();
193
194 if( X11DRV_PALETTE_PaletteFlags & X11DRV_PALETTE_VIRTUAL )
195 X11DRV_DevCaps.sizePalette = 0;
196 else
197 {
198 X11DRV_DevCaps.rasterCaps |= RC_PALETTE;
199 X11DRV_DevCaps.sizePalette = visual->map_entries;
200 }
201
202 return TRUE;
203 }
204
205 /***********************************************************************
206 * X11DRV_PALETTE_Cleanup
207 *
208 * Free external colors we grabbed in the FillDefaultPalette()
209 */
210 void X11DRV_PALETTE_Cleanup(void)
211 {
212 if( COLOR_gapFilled )
213 TSXFreeColors(display, X11DRV_PALETTE_PaletteXColormap,
214 (unsigned long*)(X11DRV_PALETTE_PaletteToXPixel + COLOR_gapStart),
215 COLOR_gapFilled, 0);
216 }
217
218 /***********************************************************************
219 * X11DRV_PALETTE_ComputeShifts
220 *
221 * Calculate conversion parameters for direct mapped visuals
222 */
223 static void X11DRV_PALETTE_ComputeShifts(unsigned long maskbits, int *shift, int *max)
224 {
225 int i;
226
227 if (maskbits==0)
228 {
229 *shift=0;
230 *max=0;
231 return;
232 }
233
234 for(i=0;!(maskbits&1);i++)
235 maskbits >>= 1;
236
237 *shift = i;
238 *max = maskbits;
239 }
240
241 /***********************************************************************
242 * X11DRV_PALETTE_BuildPrivateMap
243 *
244 * Allocate colorcells and initialize mapping tables.
245 */
246 static BOOL X11DRV_PALETTE_BuildPrivateMap(void)
247 {
248 /* Private colormap - identity mapping */
249
250 XColor color;
251 int i;
252
253 if((COLOR_sysPal = (PALETTEENTRY*)HeapAlloc(GetProcessHeap(), 0, sizeof(PALETTEENTRY)*X11DRV_DevCaps.sizePalette)) == NULL) {
254 WARN("Can not allocate system palette\n");
255 return FALSE;
256 }
257
258 TRACE("Building private map - %i palette entries\n", X11DRV_DevCaps.sizePalette);
259
260 /* Allocate system palette colors */
261
262 for( i=0; i < X11DRV_DevCaps.sizePalette; i++ )
263 {
264 if( i < NB_RESERVED_COLORS/2 )
265 {
266 color.red = COLOR_sysPalTemplate[i].peRed * 65535 / 255;
267 color.green = COLOR_sysPalTemplate[i].peGreen * 65535 / 255;
268 color.blue = COLOR_sysPalTemplate[i].peBlue * 65535 / 255;
269 COLOR_sysPal[i] = COLOR_sysPalTemplate[i];
270 }
271 else if( i >= X11DRV_DevCaps.sizePalette - NB_RESERVED_COLORS/2 )
272 {
273 int j = NB_RESERVED_COLORS + i - X11DRV_DevCaps.sizePalette;
274 color.red = COLOR_sysPalTemplate[j].peRed * 65535 / 255;
275 color.green = COLOR_sysPalTemplate[j].peGreen * 65535 / 255;
276 color.blue = COLOR_sysPalTemplate[j].peBlue * 65535 / 255;
277 COLOR_sysPal[i] = COLOR_sysPalTemplate[j];
278 }
279
280 color.flags = DoRed | DoGreen | DoBlue;
281 color.pixel = i;
282 TSXStoreColor(display, X11DRV_PALETTE_PaletteXColormap, &color);
283
284 /* Set EGA mapping if color is from the first or last eight */
285
286 if (i < 8)
287 X11DRV_PALETTE_mapEGAPixel[i] = color.pixel;
288 else if (i >= X11DRV_DevCaps.sizePalette - 8 )
289 X11DRV_PALETTE_mapEGAPixel[i - (X11DRV_DevCaps.sizePalette - 16)] = color.pixel;
290 }
291
292 X11DRV_PALETTE_XPixelToPalette = X11DRV_PALETTE_PaletteToXPixel = NULL;
293
294 COLOR_gapStart = 256; COLOR_gapEnd = -1;
295
296 X11DRV_PALETTE_firstFree = (X11DRV_DevCaps.sizePalette > NB_RESERVED_COLORS)?NB_RESERVED_COLORS/2 : -1;
297
298 return FALSE;
299 }
300
301 /***********************************************************************
302 * X11DRV_PALETTE_BuildSharedMap
303 *
304 * Allocate colorcells and initialize mapping tables.
305 */
306 static BOOL X11DRV_PALETTE_BuildSharedMap(void)
307 {
308 XColor color;
309 unsigned long sysPixel[NB_RESERVED_COLORS];
310 unsigned long* pixDynMapping = NULL;
311 unsigned long plane_masks[1];
312 int i, j, warn = 0;
313 int diff, r, g, b, max = 256, bp = 0, wp = 1;
314 int step = 1;
315
316 /* read "AllocSystemColors" from wine.conf */
317
318 COLOR_max = PROFILE_GetWineIniInt( "x11drv", "AllocSystemColors", 256);
319 if (COLOR_max > 256) COLOR_max = 256;
320 else if (COLOR_max < 20) COLOR_max = 20;
321 TRACE("%d colors configured.\n", COLOR_max);
322
323 TRACE("Building shared map - %i palette entries\n", X11DRV_DevCaps.sizePalette);
324
325 /* Be nice and allocate system colors as read-only */
326
327 for( i = 0; i < NB_RESERVED_COLORS; i++ )
328 {
329 color.red = COLOR_sysPalTemplate[i].peRed * 65535 / 255;
330 color.green = COLOR_sysPalTemplate[i].peGreen * 65535 / 255;
331 color.blue = COLOR_sysPalTemplate[i].peBlue * 65535 / 255;
332 color.flags = DoRed | DoGreen | DoBlue;
333
334 if (!TSXAllocColor( display, X11DRV_PALETTE_PaletteXColormap, &color ))
335 {
336 XColor best, c;
337
338 if( !warn++ )
339 {
340 WARN("Not enough colors for the full system palette.\n");
341
342 bp = BlackPixel(display, DefaultScreen(display));
343 wp = WhitePixel(display, DefaultScreen(display));
344
345 max = (0xffffffff)>>(32 - X11DRV_GetDepth());
346 if( max > 256 )
347 {
348 step = max/256;
349 max = 256;
350 }
351 }
352
353 /* reinit color (XAllocColor() may change it)
354 * and map to the best shared colorcell */
355
356 color.red = COLOR_sysPalTemplate[i].peRed * 65535 / 255;
357 color.green = COLOR_sysPalTemplate[i].peGreen * 65535 / 255;
358 color.blue = COLOR_sysPalTemplate[i].peBlue * 65535 / 255;
359
360 best.pixel = best.red = best.green = best.blue = 0;
361 for( c.pixel = 0, diff = 0x7fffffff; c.pixel < max; c.pixel += step )
362 {
363 TSXQueryColor(display, X11DRV_PALETTE_PaletteXColormap, &c);
364 r = (c.red - color.red)>>8;
365 g = (c.green - color.green)>>8;
366 b = (c.blue - color.blue)>>8;
367 r = r*r + g*g + b*b;
368 if( r < diff ) { best = c; diff = r; }
369 }
370
371 if( TSXAllocColor(display, X11DRV_PALETTE_PaletteXColormap, &best) )
372 color.pixel = best.pixel;
373 else color.pixel = (i < NB_RESERVED_COLORS/2)? bp : wp;
374 }
375
376 sysPixel[i] = color.pixel;
377
378 TRACE("syscolor(%lx) -> pixel %i\n",
379 *(COLORREF*)(COLOR_sysPalTemplate+i), (int)color.pixel);
380
381 /* Set EGA mapping if color in the first or last eight */
382
383 if (i < 8)
384 X11DRV_PALETTE_mapEGAPixel[i] = color.pixel;
385 else if (i >= NB_RESERVED_COLORS - 8 )
386 X11DRV_PALETTE_mapEGAPixel[i - (NB_RESERVED_COLORS-16)] = color.pixel;
387 }
388
389 /* now allocate changeable set */
390
391 if( !(X11DRV_PALETTE_PaletteFlags & X11DRV_PALETTE_FIXED) )
392 {
393 int c_min = 0, c_max = X11DRV_DevCaps.sizePalette, c_val;
394
395 TRACE("Dynamic colormap... \n");
396
397 /* comment this out if you want to debug palette init */
398
399 TSXGrabServer(display);
400
401 /* let's become the first client that actually follows
402 * X guidelines and does binary search...
403 */
404
405 if((pixDynMapping = (unsigned long*)HeapAlloc(GetProcessHeap(), 0, sizeof(long)*X11DRV_DevCaps.sizePalette)) == NULL) {
406 WARN("Out of memory while building system palette.\n");
407 return FALSE;
408 }
409 while( c_max - c_min > 0 )
410 {
411 c_val = (c_max + c_min)/2 + (c_max + c_min)%2;
412
413 if( !TSXAllocColorCells(display, X11DRV_PALETTE_PaletteXColormap, False,
414 plane_masks, 0, pixDynMapping, c_val) )
415 c_max = c_val - 1;
416 else
417 {
418 TSXFreeColors(display, X11DRV_PALETTE_PaletteXColormap, pixDynMapping, c_val, 0);
419 c_min = c_val;
420 }
421 }
422
423 if( c_min > COLOR_max - NB_RESERVED_COLORS)
424 c_min = COLOR_max - NB_RESERVED_COLORS;
425
426 c_min = (c_min/2) + (c_min/2); /* need even set for split palette */
427
428 if( c_min > 0 )
429 if( !TSXAllocColorCells(display, X11DRV_PALETTE_PaletteXColormap, False,
430 plane_masks, 0, pixDynMapping, c_min) )
431 {
432 WARN("Inexplicable failure during colorcell allocation.\n");
433 c_min = 0;
434 }
435
436 X11DRV_DevCaps.sizePalette = c_min + NB_RESERVED_COLORS;
437
438 TSXUngrabServer(display);
439
440 TRACE("adjusted size %i colorcells\n", X11DRV_DevCaps.sizePalette);
441 }
442 else if( X11DRV_PALETTE_PaletteFlags & X11DRV_PALETTE_VIRTUAL )
443 {
444 /* virtual colorspace - ToPhysical takes care of
445 * color translations but we have to allocate full palette
446 * to maintain compatibility
447 */
448 X11DRV_DevCaps.sizePalette = 256;
449 TRACE("Virtual colorspace - screendepth %i\n", X11DRV_GetDepth());
450 }
451 else X11DRV_DevCaps.sizePalette = NB_RESERVED_COLORS; /* system palette only - however we can alloc a bunch
452 * of colors and map to them */
453
454 TRACE("Shared system palette uses %i colors.\n", X11DRV_DevCaps.sizePalette);
455
456 /* set gap to account for pixel shortage. It has to be right in the center
457 * of the system palette because otherwise raster ops get screwed. */
458
459 if( X11DRV_DevCaps.sizePalette >= 256 )
460 { COLOR_gapStart = 256; COLOR_gapEnd = -1; }
461 else
462 { COLOR_gapStart = X11DRV_DevCaps.sizePalette/2; COLOR_gapEnd = 255 - X11DRV_DevCaps.sizePalette/2; }
463
464 X11DRV_PALETTE_firstFree = ( X11DRV_DevCaps.sizePalette > NB_RESERVED_COLORS &&
465 (X11DRV_PALETTE_PaletteFlags & X11DRV_PALETTE_VIRTUAL || !(X11DRV_PALETTE_PaletteFlags & X11DRV_PALETTE_FIXED)) )
466 ? NB_RESERVED_COLORS/2 : -1;
467
468 COLOR_sysPal = (PALETTEENTRY*)HeapAlloc(GetProcessHeap(),0,sizeof(PALETTEENTRY)*256);
469 if(COLOR_sysPal == NULL) {
470 ERR("Can not allocate system palette!\n");
471 return FALSE;
472 }
473
474 /* setup system palette entry <-> pixel mappings and fill in 20 fixed entries */
475
476 if (X11DRV_GetDepth() <= 8)
477 {
478 X11DRV_PALETTE_XPixelToPalette = (int*)calloc(256, sizeof(int));
479 if(X11DRV_PALETTE_XPixelToPalette == NULL) {
480 ERR("Out of memory: XPixelToPalette!\n");
481 return FALSE;
482 }
483 }
484
485 /* for hicolor visuals PaletteToPixel mapping is used to skip
486 * RGB->pixel calculation in X11DRV_PALETTE_ToPhysical().
487 */
488
489 X11DRV_PALETTE_PaletteToXPixel = (int*)HeapAlloc(GetProcessHeap(),0,sizeof(int)*256);
490 if(X11DRV_PALETTE_PaletteToXPixel == NULL) {
491 ERR("Out of memory: PaletteToXPixel!\n");
492 return FALSE;
493 }
494
495 for( i = j = 0; i < 256; i++ )
496 {
497 if( i >= COLOR_gapStart && i <= COLOR_gapEnd )
498 {
499 X11DRV_PALETTE_PaletteToXPixel[i] = 0;
500 COLOR_sysPal[i].peFlags = 0; /* mark as unused */
501 continue;
502 }
503
504 if( i < NB_RESERVED_COLORS/2 )
505 {
506 X11DRV_PALETTE_PaletteToXPixel[i] = sysPixel[i];
507 COLOR_sysPal[i] = COLOR_sysPalTemplate[i];
508 }
509 else if( i >= 256 - NB_RESERVED_COLORS/2 )
510 {
511 X11DRV_PALETTE_PaletteToXPixel[i] = sysPixel[(i + NB_RESERVED_COLORS) - 256];
512 COLOR_sysPal[i] = COLOR_sysPalTemplate[(i + NB_RESERVED_COLORS) - 256];
513 }
514 else if( pixDynMapping )
515 X11DRV_PALETTE_PaletteToXPixel[i] = pixDynMapping[j++];
516 else
517 X11DRV_PALETTE_PaletteToXPixel[i] = i;
518
519 TRACE("index %i -> pixel %i\n", i, X11DRV_PALETTE_PaletteToXPixel[i]);
520
521 if( X11DRV_PALETTE_XPixelToPalette )
522 X11DRV_PALETTE_XPixelToPalette[X11DRV_PALETTE_PaletteToXPixel[i]] = i;
523 }
524
525 if( pixDynMapping ) HeapFree(GetProcessHeap(), 0, pixDynMapping);
526
527 return TRUE;
528 }
529
530 /***********************************************************************
531 * Colormap Initialization
532 */
533 static void X11DRV_PALETTE_FillDefaultColors(void)
534 {
535 /* initialize unused entries to what Windows uses as a color
536 * cube - based on Greg Kreider's code.
537 */
538
539 int i = 0, idx = 0;
540 int red, no_r, inc_r;
541 int green, no_g, inc_g;
542 int blue, no_b, inc_b;
543
544 if (X11DRV_DevCaps.sizePalette <= NB_RESERVED_COLORS)
545 return;
546 while (i*i*i < (X11DRV_DevCaps.sizePalette - NB_RESERVED_COLORS)) i++;
547 no_r = no_g = no_b = --i;
548 if ((no_r * (no_g+1) * no_b) < (X11DRV_DevCaps.sizePalette - NB_RESERVED_COLORS)) no_g++;
549 if ((no_r * no_g * (no_b+1)) < (X11DRV_DevCaps.sizePalette - NB_RESERVED_COLORS)) no_b++;
550 inc_r = (255 - NB_COLORCUBE_START_INDEX)/no_r;
551 inc_g = (255 - NB_COLORCUBE_START_INDEX)/no_g;
552 inc_b = (255 - NB_COLORCUBE_START_INDEX)/no_b;
553
554 idx = X11DRV_PALETTE_firstFree;
555
556 if( idx != -1 )
557 for (blue = NB_COLORCUBE_START_INDEX; blue < 256 && idx; blue += inc_b )
558 for (green = NB_COLORCUBE_START_INDEX; green < 256 && idx; green += inc_g )
559 for (red = NB_COLORCUBE_START_INDEX; red < 256 && idx; red += inc_r )
560 {
561 /* weird but true */
562
563 if( red == NB_COLORCUBE_START_INDEX && green == red && blue == green ) continue;
564
565 COLOR_sysPal[idx].peRed = red;
566 COLOR_sysPal[idx].peGreen = green;
567 COLOR_sysPal[idx].peBlue = blue;
568
569 /* set X color */
570
571 if( X11DRV_PALETTE_PaletteFlags & X11DRV_PALETTE_VIRTUAL )
572 {
573 if (X11DRV_PALETTE_Redmax != 255) no_r = (red * X11DRV_PALETTE_Redmax) / 255;
574 if (X11DRV_PALETTE_Greenmax != 255) no_g = (green * X11DRV_PALETTE_Greenmax) / 255;
575 if (X11DRV_PALETTE_Bluemax != 255) no_b = (blue * X11DRV_PALETTE_Bluemax) / 255;
576
577 X11DRV_PALETTE_PaletteToXPixel[idx] = (no_r << X11DRV_PALETTE_Redshift) | (no_g << X11DRV_PALETTE_Greenshift) | (no_b << X11DRV_PALETTE_Blueshift);
578 }
579 else if( !(X11DRV_PALETTE_PaletteFlags & X11DRV_PALETTE_FIXED) )
580 {
581 XColor color;
582 color.pixel = (X11DRV_PALETTE_PaletteToXPixel)? X11DRV_PALETTE_PaletteToXPixel[idx] : idx;
583 color.red = COLOR_sysPal[idx].peRed << 8;
584 color.green = COLOR_sysPal[idx].peGreen << 8;
585 color.blue = COLOR_sysPal[idx].peBlue << 8;
586 color.flags = DoRed | DoGreen | DoBlue;
587 TSXStoreColor(display, X11DRV_PALETTE_PaletteXColormap, &color);
588 }
589 idx = X11DRV_PALETTE_freeList[idx];
590 }
591
592 /* try to fill some entries in the "gap" with
593 * what's already in the colormap - they will be
594 * mappable to but not changeable. */
595
596 if( COLOR_gapStart < COLOR_gapEnd && X11DRV_PALETTE_XPixelToPalette )
597 {
598 XColor xc;
599 int r, g, b, max;
600
601 max = COLOR_max - (256 - (COLOR_gapEnd - COLOR_gapStart));
602 for ( i = 0, idx = COLOR_gapStart; i < 256 && idx <= COLOR_gapEnd; i++ )
603 if( X11DRV_PALETTE_XPixelToPalette[i] == 0 )
604 {
605 xc.pixel = i;
606
607 TSXQueryColor(display, X11DRV_PALETTE_PaletteXColormap, &xc);
608 r = xc.red>>8; g = xc.green>>8; b = xc.blue>>8;
609
610 if( xc.pixel < 256 && X11DRV_PALETTE_CheckSysColor(RGB(r, g, b)) &&
611 TSXAllocColor(display, X11DRV_PALETTE_PaletteXColormap, &xc) )
612 {
613 X11DRV_PALETTE_XPixelToPalette[xc.pixel] = idx;
614 X11DRV_PALETTE_PaletteToXPixel[idx] = xc.pixel;
615 *(COLORREF*)(COLOR_sysPal + idx) = RGB(r, g, b);
616 COLOR_sysPal[idx++].peFlags |= PC_SYS_USED;
617 if( --max <= 0 ) break;
618 }
619 }
620 COLOR_gapFilled = idx - COLOR_gapStart;
621 }
622 }
623
624
625 /***********************************************************************
626 * X11DRV_PALETTE_ToLogical
627 *
628 * Return RGB color for given X pixel.
629 */
630 COLORREF X11DRV_PALETTE_ToLogical(int pixel)
631 {
632 XColor color;
633
634 #if 0
635 /* truecolor visual */
636
637 if (X11DRV_GetDepth() >= 24) return pixel;
638 #endif
639
640 /* check for hicolor visuals first */
641
642 if ( X11DRV_PALETTE_PaletteFlags & X11DRV_PALETTE_FIXED && !X11DRV_PALETTE_Graymax )
643 {
644 color.red = (pixel >> X11DRV_PALETTE_Redshift) & X11DRV_PALETTE_Redmax;
645 color.green = (pixel >> X11DRV_PALETTE_Greenshift) & X11DRV_PALETTE_Greenmax;
646 color.blue = (pixel >> X11DRV_PALETTE_Blueshift) & X11DRV_PALETTE_Bluemax;
647 return RGB(MulDiv(color.red, 255, X11DRV_PALETTE_Redmax),
648 MulDiv(color.green, 255, X11DRV_PALETTE_Greenmax),
649 MulDiv(color.blue, 255, X11DRV_PALETTE_Bluemax));
650 }
651
652 /* check if we can bypass X */
653
654 if ((X11DRV_GetDepth() <= 8) && (pixel < 256) &&
655 !(X11DRV_PALETTE_PaletteFlags & (X11DRV_PALETTE_VIRTUAL | X11DRV_PALETTE_FIXED)) )
656 return ( *(COLORREF*)(COLOR_sysPal +
657 ((X11DRV_PALETTE_XPixelToPalette)?X11DRV_PALETTE_XPixelToPalette[pixel]:pixel)) ) & 0x00ffffff;
658
659 color.pixel = pixel;
660 TSXQueryColor(display, X11DRV_PALETTE_PaletteXColormap, &color);
661 return RGB(color.red >> 8, color.green >> 8, color.blue >> 8);
662 }
663
664 /***********************************************************************
665 * X11DRV_PALETTE_ToPhysical
666 *
667 * Return the physical color closest to 'color'.
668 */
669 int X11DRV_PALETTE_ToPhysical( DC *dc, COLORREF color )
670 {
671 WORD index = 0;
672 HPALETTE16 hPal = (dc)? dc->hPalette: GetStockObject(DEFAULT_PALETTE);
673 unsigned char spec_type = color >> 24;
674 PALETTEOBJ* palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hPal, PALETTE_MAGIC );
675
676 /* palPtr can be NULL when DC is being destroyed */
677 if( !palPtr ) return 0;
678
679 if ( X11DRV_PALETTE_PaletteFlags & X11DRV_PALETTE_FIXED )
680 {
681 /* there is no colormap limitation; we are going to have to compute
682 * the pixel value from the visual information stored earlier
683 */
684
685 unsigned long red, green, blue;
686 unsigned idx = 0;
687
688 switch(spec_type)
689 {
690 case 1: /* PALETTEINDEX */
691
692 if( (idx = color & 0xffff) >= palPtr->logpalette.palNumEntries)
693 {
694 WARN("RGB(%lx) : idx %d is out of bounds, assuming black\n", color, idx);
695 GDI_ReleaseObj( hPal );
696 return 0;
697 }
698
699 if( palPtr->mapping )
700 {
701 int ret = palPtr->mapping[idx];
702 GDI_ReleaseObj( hPal );
703 return ret;
704 }
705 color = *(COLORREF*)(palPtr->logpalette.palPalEntry + idx);
706 break;
707
708 default:
709 color &= 0xffffff;
710 /* fall through to RGB */
711
712 case 0: /* RGB */
713 if( dc && (dc->bitsPerPixel == 1) )
714 {
715 GDI_ReleaseObj( hPal );
716 return (((color >> 16) & 0xff) +
717 ((color >> 8) & 0xff) + (color & 0xff) > 255*3/2) ? 1 : 0;
718 }
719
720 }
721
722 red = GetRValue(color); green = GetGValue(color); blue = GetBValue(color);
723
724 if (X11DRV_PALETTE_Graymax)
725 {
726 /* grayscale only; return scaled value */
727 GDI_ReleaseObj( hPal );
728 return ( (red * 30 + green * 69 + blue * 11) * X11DRV_PALETTE_Graymax) / 25500;
729 }
730 else
731 {
732 /* scale each individually and construct the TrueColor pixel value */
733 if (X11DRV_PALETTE_Redmax != 255)
734 red = MulDiv(red, X11DRV_PALETTE_Redmax, 255);
735 if (X11DRV_PALETTE_Greenmax != 255)
736 green = MulDiv(green, X11DRV_PALETTE_Greenmax, 255);
737 if (X11DRV_PALETTE_Bluemax != 255)
738 blue = MulDiv(blue, X11DRV_PALETTE_Bluemax, 255);
739
740 GDI_ReleaseObj( hPal );
741 return (red << X11DRV_PALETTE_Redshift) | (green << X11DRV_PALETTE_Greenshift) | (blue << X11DRV_PALETTE_Blueshift);
742 }
743 }
744 else
745 {
746
747 if( !palPtr->mapping )
748 WARN("Palette %04x is not realized\n", dc->hPalette);
749
750 switch(spec_type) /* we have to peruse DC and system palette */
751 {
752 default:
753 color &= 0xffffff;
754 /* fall through to RGB */
755
756 case 0: /* RGB */
757 if( dc && (dc->bitsPerPixel == 1) )
758 {
759 GDI_ReleaseObj( hPal );
760 return (((color >> 16) & 0xff) +
761 ((color >> 8) & 0xff) + (color & 0xff) > 255*3/2) ? 1 : 0;
762 }
763
764 index = COLOR_PaletteLookupPixel( COLOR_sysPal, 256,
765 X11DRV_PALETTE_PaletteToXPixel, color, FALSE);
766
767 /* TRACE(palette,"RGB(%lx) -> pixel %i\n", color, index);
768 */
769 break;
770 case 1: /* PALETTEINDEX */
771 index = color & 0xffff;
772
773 if( index >= palPtr->logpalette.palNumEntries )
774 WARN("RGB(%lx) : index %i is out of bounds\n", color, index);
775 else if( palPtr->mapping ) index = palPtr->mapping[index];
776
777 /* TRACE(palette,"PALETTEINDEX(%04x) -> pixel %i\n", (WORD)color, index);
778 */
779 break;
780 case 2: /* PALETTERGB */
781 index = COLOR_PaletteLookupPixel( palPtr->logpalette.palPalEntry,
782 palPtr->logpalette.palNumEntries,
783 palPtr->mapping, color, FALSE);
784 /* TRACE(palette,"PALETTERGB(%lx) -> pixel %i\n", color, index);
785 */
786 break;
787 }
788 }
789
790 GDI_ReleaseObj( hPal );
791 return index;
792 }
793
794 /***********************************************************************
795 * X11DRV_PALETTE_LookupSystemXPixel
796 */
797 static int X11DRV_PALETTE_LookupSystemXPixel(COLORREF col)
798 {
799 int i, best = 0, diff = 0x7fffffff;
800 int size = X11DRV_DevCaps.sizePalette;
801 int r,g,b;
802
803 for( i = 0; i < size && diff ; i++ )
804 {
805 if( i == NB_RESERVED_COLORS/2 )
806 {
807 int newi = size - NB_RESERVED_COLORS/2;
808 if (newi>i) i=newi;
809 }
810
811 r = COLOR_sysPal[i].peRed - GetRValue(col);
812 g = COLOR_sysPal[i].peGreen - GetGValue(col);
813 b = COLOR_sysPal[i].peBlue - GetBValue(col);
814
815 r = r*r + g*g + b*b;
816
817 if( r < diff ) { best = i; diff = r; }
818 }
819
820 return (X11DRV_PALETTE_PaletteToXPixel)? X11DRV_PALETTE_PaletteToXPixel[best] : best;
821 }
822
823 /***********************************************************************
824 * X11DRV_PALETTE_FormatSystemPalette
825 */
826 static void X11DRV_PALETTE_FormatSystemPalette(void)
827 {
828 /* Build free list so we'd have an easy way to find
829 * out if there are any available colorcells.
830 */
831
832 int i, j = X11DRV_PALETTE_firstFree = NB_RESERVED_COLORS/2;
833
834 COLOR_sysPal[j].peFlags = 0;
835 for( i = NB_RESERVED_COLORS/2 + 1 ; i < 256 - NB_RESERVED_COLORS/2 ; i++ )
836 if( i < COLOR_gapStart || i > COLOR_gapEnd )
837 {
838 COLOR_sysPal[i].peFlags = 0; /* unused tag */
839 X11DRV_PALETTE_freeList[j] = i; /* next */
840 j = i;
841 }
842 X11DRV_PALETTE_freeList[j] = 0;
843 }
844
845 /***********************************************************************
846 * X11DRV_PALETTE_CheckSysColor
847 */
848 static BOOL X11DRV_PALETTE_CheckSysColor(COLORREF c)
849 {
850 int i;
851 for( i = 0; i < NB_RESERVED_COLORS; i++ )
852 if( c == (*(COLORREF*)(COLOR_sysPalTemplate + i) & 0x00ffffff) )
853 return 0;
854 return 1;
855 }
856
857 /***********************************************************************
858 * X11DRV_PALETTE_SetMapping
859 *
860 * Set the color-mapping table for selected palette.
861 * Return number of entries which mapping has changed.
862 */
863 int X11DRV_PALETTE_SetMapping( PALETTEOBJ* palPtr, UINT uStart, UINT uNum, BOOL mapOnly )
864 {
865 char flag;
866 int prevMapping = (palPtr->mapping) ? 1 : 0;
867 int index, iRemapped = 0;
868 int* mapping;
869
870 /* reset dynamic system palette entries */
871
872 if( !mapOnly && X11DRV_PALETTE_firstFree != -1)
873 X11DRV_PALETTE_FormatSystemPalette();
874
875 /* initialize palette mapping table */
876
877 mapping = HeapReAlloc( GetProcessHeap(), 0, palPtr->mapping,
878 sizeof(int)*palPtr->logpalette.palNumEntries);
879 if(mapping == NULL) {
880 ERR("Can not allocate new mapping -- memory exausted!");
881 return 0;
882 }
883 palPtr->mapping = mapping;
884
885 for( uNum += uStart; uStart < uNum; uStart++ )
886 {
887 index = -1;
888 flag = PC_SYS_USED;
889
890 switch( palPtr->logpalette.palPalEntry[uStart].peFlags & 0x07 )
891 {
892 case PC_EXPLICIT: /* palette entries are indices into system palette */
893 index = *(WORD*)(palPtr->logpalette.palPalEntry + uStart);
894 if( index > 255 || (index >= COLOR_gapStart && index <= COLOR_gapEnd) )
895 {
896 WARN("PC_EXPLICIT: idx %d out of system palette, assuming black.\n", index);
897 index = 0;
898 }
899 break;
900
901 case PC_RESERVED: /* forbid future mappings to this entry */
902 flag |= PC_SYS_RESERVED;
903
904 /* fall through */
905 default: /* try to collapse identical colors */
906 index = COLOR_PaletteLookupExactIndex(COLOR_sysPal, 256,
907 *(COLORREF*)(palPtr->logpalette.palPalEntry + uStart));
908 /* fall through */
909 case PC_NOCOLLAPSE:
910 if( index < 0 )
911 {
912 if( X11DRV_PALETTE_firstFree > 0 && !(X11DRV_PALETTE_PaletteFlags & X11DRV_PALETTE_FIXED) )
913 {
914 XColor color;
915 index = X11DRV_PALETTE_firstFree; /* ought to be available */
916 X11DRV_PALETTE_firstFree = X11DRV_PALETTE_freeList[index];
917
918 color.pixel = (X11DRV_PALETTE_PaletteToXPixel) ? X11DRV_PALETTE_PaletteToXPixel[index] : index;
919 color.red = palPtr->logpalette.palPalEntry[uStart].peRed << 8;
920 color.green = palPtr->logpalette.palPalEntry[uStart].peGreen << 8;
921 color.blue = palPtr->logpalette.palPalEntry[uStart].peBlue << 8;
922 color.flags = DoRed | DoGreen | DoBlue;
923 TSXStoreColor(display, X11DRV_PALETTE_PaletteXColormap, &color);
924
925 COLOR_sysPal[index] = palPtr->logpalette.palPalEntry[uStart];
926 COLOR_sysPal[index].peFlags = flag;
927 X11DRV_PALETTE_freeList[index] = 0;
928
929 if( X11DRV_PALETTE_PaletteToXPixel ) index = X11DRV_PALETTE_PaletteToXPixel[index];
930 break;
931 }
932 else if ( X11DRV_PALETTE_PaletteFlags & X11DRV_PALETTE_VIRTUAL )
933 {
934 index = X11DRV_PALETTE_ToPhysical( NULL, 0x00ffffff &
935 *(COLORREF*)(palPtr->logpalette.palPalEntry + uStart));
936 break;
937 }
938
939 /* we have to map to existing entry in the system palette */
940
941 index = COLOR_PaletteLookupPixel(COLOR_sysPal, 256, NULL,
942 *(COLORREF*)(palPtr->logpalette.palPalEntry + uStart), TRUE);
943 }
944 palPtr->logpalette.palPalEntry[uStart].peFlags |= PC_SYS_USED;
945
946 if( X11DRV_PALETTE_PaletteToXPixel ) index = X11DRV_PALETTE_PaletteToXPixel[index];
947 break;
948 }
949
950 if( !prevMapping || palPtr->mapping[uStart] != index ) iRemapped++;
951 palPtr->mapping[uStart] = index;
952
953 TRACE("entry %i (%lx) -> pixel %i\n", uStart,
954 *(COLORREF*)(palPtr->logpalette.palPalEntry + uStart), index);
955
956 }
957 return iRemapped;
958 }
959
960 /***********************************************************************
961 * X11DRV_PALETTE_UpdateMapping
962 *
963 * Update the color-mapping table for selected palette.
964 * Return number of entries which mapping has changed.
965 */
966 int X11DRV_PALETTE_UpdateMapping(PALETTEOBJ *palPtr)
967 {
968 int i, index, realized = 0;
969
970 if (!X11DRV_DevCaps.sizePalette)
971 return 0;
972
973 for( i = 0; i < 20; i++ )
974 {
975 index = X11DRV_PALETTE_LookupSystemXPixel(*(COLORREF*)(palPtr->logpalette.palPalEntry + i));
976
977 /* mapping is allocated in COLOR_InitPalette() */
978
979 if( index != palPtr->mapping[i] ) { palPtr->mapping[i]=index; realized++; }
980 }
981
982 return realized;
983 }
984
985 /**************************************************************************
986 * X11DRV_PALETTE_IsDark
987 */
988 BOOL X11DRV_PALETTE_IsDark(int pixel)
989 {
990 COLORREF col = X11DRV_PALETTE_ToLogical(pixel);
991 return (GetRValue(col) + GetGValue(col) + GetBValue(col)) <= 0x180;
992 }
993
Windows API implementation