summaryrefslogtreecommitdiffstats
path: root/win/tkWinColor.c
blob: e81398f2cd32db31fe81996f49d564f8ee5a93ca (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
/* 
 * tkWinColor.c --
 *
 *	Functions to map color names to system color values.
 *
 * Copyright (c) 1995 Sun Microsystems, Inc.
 * Copyright (c) 1994 Software Research Associates, Inc.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

#include "tkWinInt.h"
#include "tkColor.h"

/*
 * The following structure is used to keep track of each color that is
 * allocated by this module.
 */

typedef struct WinColor {
    TkColor info;		/* Generic color information. */
    int index;			/* Index for GetSysColor(), -1 if color
				 * is not a "live" system color. */
} WinColor;

/*
 * The sysColors array contains the names and index values for the
 * Windows indirect system color names.  In use, all of the names
 * will have the string "System" prepended, but we omit it in the table
 * to save space.
 */

typedef struct {
    char *name;
    int index;
} SystemColorEntry;


static SystemColorEntry sysColors[] = {
    "3dDarkShadow",		COLOR_3DDKSHADOW,
    "3dLight",			COLOR_3DLIGHT,
    "ActiveBorder",		COLOR_ACTIVEBORDER,
    "ActiveCaption",		COLOR_ACTIVECAPTION,
    "AppWorkspace",		COLOR_APPWORKSPACE,
    "Background",		COLOR_BACKGROUND,
    "ButtonFace",		COLOR_BTNFACE,
    "ButtonHighlight",		COLOR_BTNHIGHLIGHT,
    "ButtonShadow",		COLOR_BTNSHADOW,
    "ButtonText",		COLOR_BTNTEXT,
    "CaptionText",		COLOR_CAPTIONTEXT,
    "DisabledText",		COLOR_GRAYTEXT,
    "GrayText",			COLOR_GRAYTEXT,
    "Highlight",		COLOR_HIGHLIGHT,
    "HighlightText",		COLOR_HIGHLIGHTTEXT,
    "InactiveBorder",		COLOR_INACTIVEBORDER,
    "InactiveCaption",		COLOR_INACTIVECAPTION,
    "InactiveCaptionText",	COLOR_INACTIVECAPTIONTEXT,
    "InfoBackground",		COLOR_INFOBK,
    "InfoText",			COLOR_INFOTEXT,
    "Menu",			COLOR_MENU,
    "MenuText",			COLOR_MENUTEXT,
    "Scrollbar",		COLOR_SCROLLBAR,
    "Window",			COLOR_WINDOW,
    "WindowFrame",		COLOR_WINDOWFRAME,
    "WindowText",		COLOR_WINDOWTEXT,
    NULL,			0
};

typedef struct ThreadSpecificData { 
    int ncolors;
} ThreadSpecificData;
static Tcl_ThreadDataKey dataKey;

/*
 * Forward declarations for functions defined later in this file.
 */

static int	FindSystemColor _ANSI_ARGS_((const char *name,
		    XColor *colorPtr, int *indexPtr));

/*
 *----------------------------------------------------------------------
 *
 * FindSystemColor --
 *
 *	This routine finds the color entry that corresponds to the
 *	specified color.
 *
 * Results:
 *	Returns non-zero on success.  The RGB values of the XColor
 *	will be initialized to the proper values on success.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static int
FindSystemColor(name, colorPtr, indexPtr)
    const char *name;		/* Color name. */
    XColor *colorPtr;		/* Where to store results. */
    int *indexPtr;		/* Out parameter to store color index. */
{
    int l, u, r, i;
    ThreadSpecificData *tsdPtr = (ThreadSpecificData *) 
            Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    /*
     * Count the number of elements in the color array if we haven't
     * done so yet.
     */

    if (tsdPtr->ncolors == 0) {
	SystemColorEntry *ePtr;
	int version;

	version = LOBYTE(LOWORD(GetVersion()));
	for (ePtr = sysColors; ePtr->name != NULL; ePtr++) {
	    if (version < 4) {
		if (ePtr->index == COLOR_3DDKSHADOW) {
		    ePtr->index = COLOR_BTNSHADOW;
		} else if (ePtr->index == COLOR_3DLIGHT) {
		    ePtr->index = COLOR_BTNHIGHLIGHT;
		}
	    }
	    tsdPtr->ncolors++;
	}
    }

    /*
     * Perform a binary search on the sorted array of colors.
     */

    l = 0;
    u = tsdPtr->ncolors - 1;
    while (l <= u) {
	i = (l + u) / 2;
	r = strcasecmp(name, sysColors[i].name);
	if (r == 0) {
	    break;
	} else if (r < 0) {
	    u = i-1;
	} else {
	    l = i+1;
	}
    }
    if (l > u) {
	return 0;
    }

    *indexPtr = sysColors[i].index;
    colorPtr->pixel = GetSysColor(sysColors[i].index);
    /*
     * x257 is (value<<8 + value) to get the properly bit shifted
     * and padded value.  [Bug: 4919]
     */
    colorPtr->red = GetRValue(colorPtr->pixel) * 257;
    colorPtr->green = GetGValue(colorPtr->pixel) * 257;
    colorPtr->blue = GetBValue(colorPtr->pixel) * 257;
    colorPtr->flags = DoRed|DoGreen|DoBlue;
    colorPtr->pad = 0;
    return 1;
}

/*
 *----------------------------------------------------------------------
 *
 * TkpGetColor --
 *
 *	Allocate a new TkColor for the color with the given name.
 *
 * Results:
 *	Returns a newly allocated TkColor, or NULL on failure.
 *
 * Side effects:
 *	May invalidate the colormap cache associated with tkwin upon
 *	allocating a new colormap entry.  Allocates a new TkColor
 *	structure.
 *
 *----------------------------------------------------------------------
 */

TkColor *
TkpGetColor(tkwin, name)
    Tk_Window tkwin;		/* Window in which color will be used. */
    Tk_Uid name;		/* Name of color to allocated (in form
				 * suitable for passing to XParseColor). */
{
    WinColor *winColPtr;
    XColor color;
    int index = -1;		/* -1 indicates that this is not an indirect
				 * sytem color. */

    /*
     * Check to see if it is a system color or an X color string.  If the
     * color is found, allocate a new WinColor and store the XColor and the
     * system color index.
     */

    if (((strncasecmp(name, "system", 6) == 0)
	    && FindSystemColor(name+6, &color, &index))
	    || XParseColor(Tk_Display(tkwin), Tk_Colormap(tkwin), name,
		    &color)) {
	winColPtr = (WinColor *) ckalloc(sizeof(WinColor));
	winColPtr->info.color = color;
	winColPtr->index = index;

	XAllocColor(Tk_Display(tkwin), Tk_Colormap(tkwin),
		&winColPtr->info.color);
 	return (TkColor *) winColPtr; 
    }
    return (TkColor *) NULL;
}

/*
 *----------------------------------------------------------------------
 *
 * TkpGetColorByValue --
 *
 *	Given a desired set of red-green-blue intensities for a color,
 *	locate a pixel value to use to draw that color in a given
 *	window.
 *
 * Results:
 *	The return value is a pointer to an TkColor structure that
 *	indicates the closest red, blue, and green intensities available
 *	to those specified in colorPtr, and also specifies a pixel
 *	value to use to draw in that color.
 *
 * Side effects:
 *	May invalidate the colormap cache for the specified window.
 *	Allocates a new TkColor structure.
 *
 *----------------------------------------------------------------------
 */

TkColor *
TkpGetColorByValue(tkwin, colorPtr)
    Tk_Window tkwin;		/* Window in which color will be used. */
    XColor *colorPtr;		/* Red, green, and blue fields indicate
				 * desired color. */
{
    WinColor *tkColPtr = (WinColor *) ckalloc(sizeof(WinColor));

    tkColPtr->info.color.red = colorPtr->red;
    tkColPtr->info.color.green = colorPtr->green;
    tkColPtr->info.color.blue = colorPtr->blue;
    tkColPtr->info.color.pixel = 0;
    tkColPtr->index = -1;
    XAllocColor(Tk_Display(tkwin), Tk_Colormap(tkwin), &tkColPtr->info.color);
    return (TkColor *) tkColPtr;
}

/*
 *----------------------------------------------------------------------
 *
 * TkpFreeColor --
 *
 *	Release the specified color back to the system.
 *
 * Results:
 *	None
 *
 * Side effects:
 *	Invalidates the colormap cache for the colormap associated with
 *	the given color.
 *
 *----------------------------------------------------------------------
 */

void
TkpFreeColor(tkColPtr)
    TkColor *tkColPtr;		/* Color to be released.  Must have been
				 * allocated by TkpGetColor or
				 * TkpGetColorByValue. */
{
    Screen *screen = tkColPtr->screen;

    XFreeColors(DisplayOfScreen(screen), tkColPtr->colormap,
	    &tkColPtr->color.pixel, 1, 0L);
}

/*
 *----------------------------------------------------------------------
 *
 * TkWinIndexOfColor --
 *
 *	Given a color, return the system color index that was used
 *	to create the color.
 *
 * Results:
 *	If the color was allocated using a system indirect color name,
 *	then the corresponding GetSysColor() index is returned.
 *	Otherwise, -1 is returned.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

int
TkWinIndexOfColor(colorPtr)
    XColor *colorPtr;
{
    register WinColor *winColPtr = (WinColor *) colorPtr;
    if (winColPtr->info.magic == COLOR_MAGIC) {
	return winColPtr->index;
    }    
    return -1;
}

/*
 *----------------------------------------------------------------------
 *
 * XAllocColor --
 *
 *	Find the closest available color to the specified XColor.
 *
 * Results:
 *	Updates the color argument and returns 1 on success.  Otherwise
 *	returns 0.
 *
 * Side effects:
 *	Allocates a new color in the palette.
 *
 *----------------------------------------------------------------------
 */

int
XAllocColor(display, colormap, color)
    Display* display;
    Colormap colormap;
    XColor* color;
{
    TkWinColormap *cmap = (TkWinColormap *) colormap;
    PALETTEENTRY entry, closeEntry;
    HDC dc = GetDC(NULL);

    entry.peRed = (color->red) >> 8;
    entry.peGreen = (color->green) >> 8;
    entry.peBlue = (color->blue) >> 8;
    entry.peFlags = 0;

    if (GetDeviceCaps(dc, RASTERCAPS) & RC_PALETTE) {
	unsigned long sizePalette = GetDeviceCaps(dc, SIZEPALETTE);
	UINT newPixel, closePixel;
	int new, refCount;
	Tcl_HashEntry *entryPtr;
	UINT index;

	/*
	 * Find the nearest existing palette entry.
	 */
	
	newPixel = RGB(entry.peRed, entry.peGreen, entry.peBlue);
	index = GetNearestPaletteIndex(cmap->palette, newPixel);
	GetPaletteEntries(cmap->palette, index, 1, &closeEntry);
	closePixel = RGB(closeEntry.peRed, closeEntry.peGreen,
		closeEntry.peBlue);

	/*
	 * If this is not a duplicate, allocate a new entry.  Note that
	 * we may get values for index that are above the current size
	 * of the palette.  This happens because we don't shrink the size of
	 * the palette object when we deallocate colors so there may be
	 * stale values that match in the upper slots.  We should ignore
	 * those values and just put the new color in as if the colors
	 * had not matched.
	 */
	
	if ((index >= cmap->size) || (newPixel != closePixel)) {
	    if (cmap->size == sizePalette) {
		color->red   = closeEntry.peRed * 257;
		color->green = closeEntry.peGreen * 257;
		color->blue  = closeEntry.peBlue * 257;
		entry = closeEntry;
		if (index >= cmap->size) {
		    OutputDebugString("XAllocColor: Colormap is bigger than we thought");
		}
	    } else {
		cmap->size++;
		ResizePalette(cmap->palette, cmap->size);
		SetPaletteEntries(cmap->palette, cmap->size - 1, 1, &entry);
	    }
	}

	color->pixel = PALETTERGB(entry.peRed, entry.peGreen, entry.peBlue);
	entryPtr = Tcl_CreateHashEntry(&cmap->refCounts,
		(char *) color->pixel, &new);
	if (new) {
	    refCount = 1;
	} else {
	    refCount = ((int) Tcl_GetHashValue(entryPtr)) + 1;
	}
	Tcl_SetHashValue(entryPtr, (ClientData)refCount);
    } else {
	
	/*
	 * Determine what color will actually be used on non-colormap systems.
	 */
	
	color->pixel = GetNearestColor(dc,
		RGB(entry.peRed, entry.peGreen, entry.peBlue));
	color->red    = GetRValue(color->pixel) * 257;
	color->green  = GetGValue(color->pixel) * 257;
	color->blue   = GetBValue(color->pixel) * 257;
    }

    ReleaseDC(NULL, dc);
    return 1;
}

/*
 *----------------------------------------------------------------------
 *
 * XFreeColors --
 *
 *	Deallocate a block of colors.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Removes entries for the current palette and compacts the
 *	remaining set.
 *
 *----------------------------------------------------------------------
 */

void
XFreeColors(display, colormap, pixels, npixels, planes)
    Display* display;
    Colormap colormap;
    unsigned long* pixels;
    int npixels;
    unsigned long planes;
{
    TkWinColormap *cmap = (TkWinColormap *) colormap;
    COLORREF cref;
    UINT count, index, refCount;
    int i;
    PALETTEENTRY entry, *entries;
    Tcl_HashEntry *entryPtr;
    HDC dc = GetDC(NULL);

    /*
     * We don't have to do anything for non-palette devices.
     */
    
    if (GetDeviceCaps(dc, RASTERCAPS) & RC_PALETTE) {

	/*
	 * This is really slow for large values of npixels.
	 */

	for (i = 0; i < npixels; i++) {
	    entryPtr = Tcl_FindHashEntry(&cmap->refCounts,
		    (char *) pixels[i]);
	    if (!entryPtr) {
		panic("Tried to free a color that isn't allocated.");
	    }
	    refCount = (int) Tcl_GetHashValue(entryPtr) - 1;
	    if (refCount == 0) {
		cref = pixels[i] & 0x00ffffff;
		index = GetNearestPaletteIndex(cmap->palette, cref);
		GetPaletteEntries(cmap->palette, index, 1, &entry);
		if (cref == RGB(entry.peRed, entry.peGreen, entry.peBlue)) {
		    count = cmap->size - index;
		    entries = (PALETTEENTRY *) ckalloc(sizeof(PALETTEENTRY)
			    * count);
		    GetPaletteEntries(cmap->palette, index+1, count, entries);
		    SetPaletteEntries(cmap->palette, index, count, entries);
		    ckfree((char *) entries);
		    cmap->size--;
		} else {
		    panic("Tried to free a color that isn't allocated.");
		}
		Tcl_DeleteHashEntry(entryPtr);
	    } else {
		Tcl_SetHashValue(entryPtr, (ClientData)refCount);
	    }
	}
    }
    ReleaseDC(NULL, dc);
}

/*
 *----------------------------------------------------------------------
 *
 * XCreateColormap --
 *
 *	Allocate a new colormap.
 *
 * Results:
 *	Returns a newly allocated colormap.
 *
 * Side effects:
 *	Allocates an empty palette and color list.
 *
 *----------------------------------------------------------------------
 */

Colormap
XCreateColormap(display, w, visual, alloc)
    Display* display;
    Window w;
    Visual* visual;
    int alloc;
{
    char logPalBuf[sizeof(LOGPALETTE) + 256 * sizeof(PALETTEENTRY)];
    LOGPALETTE *logPalettePtr;
    PALETTEENTRY *entryPtr;
    TkWinColormap *cmap;
    Tcl_HashEntry *hashPtr;
    int new;
    UINT i;
    HPALETTE sysPal;

    /*
     * Allocate a starting palette with all of the reserved colors.
     */

    logPalettePtr = (LOGPALETTE *) logPalBuf;
    logPalettePtr->palVersion = 0x300;
    sysPal = (HPALETTE) GetStockObject(DEFAULT_PALETTE);
    logPalettePtr->palNumEntries = GetPaletteEntries(sysPal, 0, 256,
	    logPalettePtr->palPalEntry);

    cmap = (TkWinColormap *) ckalloc(sizeof(TkWinColormap));
    cmap->size = logPalettePtr->palNumEntries;
    cmap->stale = 0;
    cmap->palette = CreatePalette(logPalettePtr);

    /*
     * Add hash entries for each of the static colors.
     */

    Tcl_InitHashTable(&cmap->refCounts, TCL_ONE_WORD_KEYS);
    for (i = 0; i < logPalettePtr->palNumEntries; i++) {
	entryPtr = logPalettePtr->palPalEntry + i;
	hashPtr = Tcl_CreateHashEntry(&cmap->refCounts, (char*) PALETTERGB(
	    entryPtr->peRed, entryPtr->peGreen, entryPtr->peBlue), &new);
	Tcl_SetHashValue(hashPtr, (ClientData)1);
    }

    return (Colormap)cmap;
}

/*
 *----------------------------------------------------------------------
 *
 * XFreeColormap --
 *
 *	Frees the resources associated with the given colormap.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Deletes the palette associated with the colormap.  Note that
 *	the palette must not be selected into a device context when
 *	this occurs.
 *
 *----------------------------------------------------------------------
 */

void
XFreeColormap(display, colormap)
    Display* display;
    Colormap colormap;
{
    TkWinColormap *cmap = (TkWinColormap *) colormap;
    if (!DeleteObject(cmap->palette)) {
	panic("Unable to free colormap, palette is still selected.");
    }
    Tcl_DeleteHashTable(&cmap->refCounts);
    ckfree((char *) cmap);
}

/*
 *----------------------------------------------------------------------
 *
 * TkWinSelectPalette --
 *
 *	This function sets up the specified device context with a
 *	given palette.  If the palette is stale, it realizes it in
 *	the background unless the palette is the current global
 *	palette.
 *
 * Results:
 *	Returns the previous palette selected into the device context.
 *
 * Side effects:
 *	May change the system palette.
 *
 *----------------------------------------------------------------------
 */

HPALETTE
TkWinSelectPalette(dc, colormap)
    HDC dc;
    Colormap colormap;
{
    TkWinColormap *cmap = (TkWinColormap *) colormap;
    HPALETTE oldPalette;

    oldPalette = SelectPalette(dc, cmap->palette,
	    (cmap->palette == TkWinGetSystemPalette()) ? FALSE : TRUE);
    RealizePalette(dc);
    return oldPalette;
}