summaryrefslogtreecommitdiff
path: root/mi/micmap.c
blob: 6318d674514b934fa0531e80d4e28f9c722aec5a (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
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
/************************************************************
Copyright 1987 by Sun Microsystems, Inc. Mountain View, CA.

                    All Rights Reserved

Permission  to  use,  copy,  modify,  and  distribute   this
software  and  its documentation for any purpose and without
fee is hereby granted, provided that the above copyright no-
tice  appear  in all copies and that both that copyright no-
tice and this permission notice appear in  supporting  docu-
mentation,  and  that the names of Sun or X Consortium
not be used in advertising or publicity pertaining to 
distribution  of  the software  without specific prior 
written permission. Sun and X Consortium make no 
representations about the suitability of this software for 
any purpose. It is provided "as is" without any express or 
implied warranty.

SUN DISCLAIMS ALL WARRANTIES WITH REGARD TO  THIS  SOFTWARE,
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT-
NESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SUN BE  LI-
ABLE  FOR  ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,  DATA  OR
PROFITS,  WHETHER  IN  AN  ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION  WITH
THE USE OR PERFORMANCE OF THIS SOFTWARE.

********************************************************/

/*
 * This is based on cfbcmap.c.  The functions here are useful independently
 * of cfb, which is the reason for including them here.  How "mi" these
 * are may be debatable.
 */


#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

#include <X11/X.h>
#include <X11/Xproto.h>
#include "scrnintstr.h"
#include "colormapst.h"
#include "resource.h"
#include "globals.h"
#include "micmap.h"

ColormapPtr miInstalledMaps[MAXSCREENS];

int
miListInstalledColormaps(ScreenPtr pScreen, Colormap *pmaps)
{
    if (miInstalledMaps[pScreen->myNum]) {
	*pmaps = miInstalledMaps[pScreen->myNum]->mid;
	return (1);
    }
    return 0;
}

void
miInstallColormap(ColormapPtr pmap)
{
    int index = pmap->pScreen->myNum;
    ColormapPtr oldpmap = miInstalledMaps[index];

    if(pmap != oldpmap)
    {
	/* Uninstall pInstalledMap. No hardware changes required, just
	 * notify all interested parties. */
	if(oldpmap != (ColormapPtr)None)
	    WalkTree(pmap->pScreen, TellLostMap, (char *)&oldpmap->mid);
	/* Install pmap */
	miInstalledMaps[index] = pmap;
	WalkTree(pmap->pScreen, TellGainedMap, (char *)&pmap->mid);

    }
}

void
miUninstallColormap(ColormapPtr pmap)
{
    int index = pmap->pScreen->myNum;
    ColormapPtr curpmap = miInstalledMaps[index];

    if(pmap == curpmap)
    {
	if (pmap->mid != pmap->pScreen->defColormap)
	{
	    curpmap = (ColormapPtr) LookupIDByType(pmap->pScreen->defColormap,
						   RT_COLORMAP);
	    (*pmap->pScreen->InstallColormap)(curpmap);
	}
    }
}

void
miResolveColor(unsigned short *pred, unsigned short *pgreen,
		unsigned short *pblue, VisualPtr pVisual)
{
    int shift = 16 - pVisual->bitsPerRGBValue;
    unsigned lim = (1 << pVisual->bitsPerRGBValue) - 1;

    if ((pVisual->class | DynamicClass) == GrayScale)
    {
	/* rescale to gray then rgb bits */
	*pred = (30L * *pred + 59L * *pgreen + 11L * *pblue) / 100;
	*pblue = *pgreen = *pred = ((*pred >> shift) * 65535) / lim;
    }
    else
    {
	/* rescale to rgb bits */
	*pred = ((*pred >> shift) * 65535) / lim;
	*pgreen = ((*pgreen >> shift) * 65535) / lim;
	*pblue = ((*pblue >> shift) * 65535) / lim;
    }
}

Bool
miInitializeColormap(ColormapPtr pmap)
{
    unsigned i;
    VisualPtr pVisual;
    unsigned lim, maxent, shift;

    pVisual = pmap->pVisual;
    lim = (1 << pVisual->bitsPerRGBValue) - 1;
    shift = 16 - pVisual->bitsPerRGBValue;
    maxent = pVisual->ColormapEntries - 1;
    if (pVisual->class == TrueColor)
    {
	unsigned limr, limg, limb;

	limr = pVisual->redMask >> pVisual->offsetRed;
	limg = pVisual->greenMask >> pVisual->offsetGreen;
	limb = pVisual->blueMask >> pVisual->offsetBlue;
	for(i = 0; i <= maxent; i++)
	{
	    /* rescale to [0..65535] then rgb bits */
	    pmap->red[i].co.local.red =
		((((i * 65535) / limr) >> shift) * 65535) / lim;
	    pmap->green[i].co.local.green =
		((((i * 65535) / limg) >> shift) * 65535) / lim;
	    pmap->blue[i].co.local.blue =
		((((i * 65535) / limb) >> shift) * 65535) / lim;
	}
    }
    else if (pVisual->class == StaticColor)
    {
	unsigned limr, limg, limb;

	limr = pVisual->redMask >> pVisual->offsetRed;
	limg = pVisual->greenMask >> pVisual->offsetGreen;
	limb = pVisual->blueMask >> pVisual->offsetBlue;
	for(i = 0; i <= maxent; i++)
	{
	    /* rescale to [0..65535] then rgb bits */
	    pmap->red[i].co.local.red =
		((((((i & pVisual->redMask) >> pVisual->offsetRed)
		    * 65535) / limr) >> shift) * 65535) / lim;
	    pmap->red[i].co.local.green =
		((((((i & pVisual->greenMask) >> pVisual->offsetGreen)
		    * 65535) / limg) >> shift) * 65535) / lim;
	    pmap->red[i].co.local.blue =
		((((((i & pVisual->blueMask) >> pVisual->offsetBlue)
		    * 65535) / limb) >> shift) * 65535) / lim;
	}
    }
    else if (pVisual->class == StaticGray)
    {
	for(i = 0; i <= maxent; i++)
	{
	    /* rescale to [0..65535] then rgb bits */
	    pmap->red[i].co.local.red = ((((i * 65535) / maxent) >> shift)
					 * 65535) / lim;
	    pmap->red[i].co.local.green = pmap->red[i].co.local.red;
	    pmap->red[i].co.local.blue = pmap->red[i].co.local.red;
	}
    }
    return TRUE;
}

/* When simulating DirectColor on PseudoColor hardware, multiple
   entries of the colormap must be updated
 */

#define AddElement(mask) { \
    pixel = red | green | blue; \
    for (i = 0; i < nresult; i++) \
  	if (outdefs[i].pixel == pixel) \
    	    break; \
    if (i == nresult) \
    { \
   	nresult++; \
	outdefs[i].pixel = pixel; \
	outdefs[i].flags = 0; \
    } \
    outdefs[i].flags |= (mask); \
    outdefs[i].red = pmap->red[red >> pVisual->offsetRed].co.local.red; \
    outdefs[i].green = pmap->green[green >> pVisual->offsetGreen].co.local.green; \
    outdefs[i].blue = pmap->blue[blue >> pVisual->offsetBlue].co.local.blue; \
}

int
miExpandDirectColors(ColormapPtr pmap, int ndef, xColorItem *indefs,
			xColorItem *outdefs)
{
    int	        red, green, blue;
    int	        maxred, maxgreen, maxblue;
    int	        stepred, stepgreen, stepblue;
    VisualPtr   pVisual;
    int         pixel;
    int         nresult;
    int         i;

    pVisual = pmap->pVisual;

    stepred = 1 << pVisual->offsetRed;
    stepgreen = 1 << pVisual->offsetGreen;
    stepblue = 1 << pVisual->offsetBlue;
    maxred = pVisual->redMask;
    maxgreen = pVisual->greenMask;
    maxblue = pVisual->blueMask;
    nresult = 0;
    for (;ndef--; indefs++)
    {
	if (indefs->flags & DoRed)
	{
	    red = indefs->pixel & pVisual->redMask;
    	    for (green = 0; green <= maxgreen; green += stepgreen)
    	    {
	    	for (blue = 0; blue <= maxblue; blue += stepblue)
	    	{
		    AddElement (DoRed)
	    	}
    	    }
	}
	if (indefs->flags & DoGreen)
	{
	    green = indefs->pixel & pVisual->greenMask;
    	    for (red = 0; red <= maxred; red += stepred)
    	    {
	    	for (blue = 0; blue <= maxblue; blue += stepblue)
	    	{
		    AddElement (DoGreen)
	    	}
    	    }
	}
	if (indefs->flags & DoBlue)
	{
	    blue = indefs->pixel & pVisual->blueMask;
    	    for (red = 0; red <= maxred; red += stepred)
    	    {
	    	for (green = 0; green <= maxgreen; green += stepgreen)
	    	{
		    AddElement (DoBlue)
	    	}
    	    }
	}
    }
    return nresult;
}

Bool
miCreateDefColormap(ScreenPtr pScreen)
{
/* 
 * In the following sources PC X server vendors may want to delete 
 * "_not_tog" from "#ifdef WIN32_not_tog"
 */
#ifdef WIN32_not_tog
    /*  
     * these are the MS-Windows desktop colors, adjusted for X's 16-bit 
     * color specifications.
     */
    static xColorItem citems[] = {
	{   0,      0,      0,      0, 0, 0 },
	{   1, 0x8000,      0,      0, 0, 0 },
	{   2,      0, 0x8000,      0, 0, 0 },
	{   3, 0x8000, 0x8000,      0, 0, 0 },
	{   4,      0,      0, 0x8000, 0, 0 },
	{   5, 0x8000,      0, 0x8000, 0, 0 },
	{   6,      0, 0x8000, 0x8000, 0, 0 },
	{   7, 0xc000, 0xc000, 0xc000, 0, 0 },
	{   8, 0xc000, 0xdc00, 0xc000, 0, 0 },
	{   9, 0xa600, 0xca00, 0xf000, 0, 0 },
	{ 246, 0xff00, 0xfb00, 0xf000, 0, 0 },
	{ 247, 0xa000, 0xa000, 0xa400, 0, 0 },
	{ 248, 0x8000, 0x8000, 0x8000, 0, 0 },
	{ 249, 0xff00,      0,      0, 0, 0 },
	{ 250,      0, 0xff00,      0, 0, 0 },
	{ 251, 0xff00, 0xff00,      0, 0, 0 },
	{ 252,      0,      0, 0xff00, 0, 0 },
	{ 253, 0xff00,      0, 0xff00, 0, 0 },
	{ 254,      0, 0xff00, 0xff00, 0, 0 },
	{ 255, 0xff00, 0xff00, 0xff00, 0, 0 }
    };
#define NUM_DESKTOP_COLORS sizeof citems / sizeof citems[0]
    int i;
#else
    unsigned short	zero = 0, ones = 0xFFFF;
#endif
    Pixel wp, bp;
    VisualPtr	pVisual;
    ColormapPtr	cmap;
    int alloctype;
    
    for (pVisual = pScreen->visuals;
	 pVisual->vid != pScreen->rootVisual;
	 pVisual++)
	;

    if (pScreen->rootDepth == 1 || (pVisual->class & DynamicClass))
	alloctype = AllocNone;
    else
	alloctype = AllocAll;

    if (CreateColormap(pScreen->defColormap, pScreen, pVisual, &cmap,
		       alloctype, 0) != Success)
	return FALSE;

    if (pScreen->rootDepth > 1) {
	wp = pScreen->whitePixel;
	bp = pScreen->blackPixel;
#ifdef WIN32_not_tog
	for (i = 0; i < NUM_DESKTOP_COLORS; i++) {
	    if (AllocColor (cmap,
			    &citems[i].red, &citems[i].green, &citems[i].blue,
			    &citems[i].pixel, 0) != Success)
		return FALSE;
	}
#else
	if ((AllocColor(cmap, &ones, &ones, &ones, &wp, 0) !=
       	       Success) ||
	    (AllocColor(cmap, &zero, &zero, &zero, &bp, 0) !=
       	       Success))
    	    return FALSE;
	pScreen->whitePixel = wp;
	pScreen->blackPixel = bp;
#endif
    }

    (*pScreen->InstallColormap)(cmap);
    return TRUE;
}

/*
 * Default true color bitmasks, should be overridden by
 * driver
 */

#define _RZ(d) ((d + 2) / 3)
#define _RS(d) 0
#define _RM(d) ((1 << _RZ(d)) - 1)
#define _GZ(d) ((d - _RZ(d) + 1) / 2)
#define _GS(d) _RZ(d)
#define _GM(d) (((1 << _GZ(d)) - 1) << _GS(d))
#define _BZ(d) (d - _RZ(d) - _GZ(d))
#define _BS(d) (_RZ(d) + _GZ(d))
#define _BM(d) (((1 << _BZ(d)) - 1) << _BS(d))
#define _CE(d) (1 << _RZ(d))

typedef struct _miVisuals {
    struct _miVisuals	*next;
    int			depth;
    int			bitsPerRGB;
    int			visuals;
    int			count;
    int			preferredCVC;
    Pixel		redMask, greenMask, blueMask;
} miVisualsRec, *miVisualsPtr;

static int  miVisualPriority[] = {
    PseudoColor, GrayScale, StaticColor, TrueColor, DirectColor, StaticGray
};

#define NUM_PRIORITY	6

static miVisualsPtr	miVisuals;

void
miClearVisualTypes(void)
{
    miVisualsPtr v;

    while ((v = miVisuals)) {
	miVisuals = v->next;
	xfree(v);
    }
}


Bool
miSetVisualTypesAndMasks(int depth, int visuals, int bitsPerRGB, 
			 int preferredCVC,
			 Pixel redMask, Pixel greenMask, Pixel blueMask)
{
    miVisualsPtr   new, *prev, v;
    int		    count;

    new = xalloc (sizeof *new);
    if (!new)
	return FALSE;
    if (!redMask || !greenMask || !blueMask)
    {
	redMask = _RM(depth);
	greenMask = _GM(depth);
	blueMask = _BM(depth);
    }
    new->next = 0;
    new->depth = depth;
    new->visuals = visuals;
    new->bitsPerRGB = bitsPerRGB;
    new->preferredCVC = preferredCVC;
    new->redMask = redMask;
    new->greenMask = greenMask;
    new->blueMask = blueMask;
    count = (visuals >> 1) & 033333333333;
    count = visuals - count - ((count >> 1) & 033333333333);
    count = (((count + (count >> 3)) & 030707070707) % 077);	/* HAKMEM 169 */
    new->count = count;
    for (prev = &miVisuals; (v = *prev); prev = &v->next);
    *prev = new;
    return TRUE;
}

Bool
miSetVisualTypes(int depth, int visuals, int bitsPerRGB, int preferredCVC)
{
    return miSetVisualTypesAndMasks (depth, visuals, bitsPerRGB,
				     preferredCVC, 0, 0, 0);
}

int
miGetDefaultVisualMask(int depth)
{
    if (depth > MAX_PSEUDO_DEPTH)
	return LARGE_VISUALS;
    else if (depth >= MIN_TRUE_DEPTH)
	return ALL_VISUALS;
    else if (depth == 1)
	return StaticGrayMask;
    else
	return SMALL_VISUALS;
}

static Bool
miVisualTypesSet (int depth)
{
    miVisualsPtr    visuals;

    for (visuals = miVisuals; visuals; visuals = visuals->next)
	if (visuals->depth == depth)
	    return TRUE;
    return FALSE;
}

Bool
miSetPixmapDepths (void)
{
    int	d, f;
    
    /* Add any unlisted depths from the pixmap formats */
    for (f = 0; f < screenInfo.numPixmapFormats; f++) 
    {
	d = screenInfo.formats[f].depth;
	if (!miVisualTypesSet (d))
	{
	    if (!miSetVisualTypes (d, 0, 0, -1))
		return FALSE;
	}
    }
    return TRUE;
}

/*
 * Distance to least significant one bit
 */
static int
maskShift (Pixel p)
{
    int	s;

    if (!p) return 0;
    s = 0;
    while (!(p & 1))
    {
	s++;
	p >>= 1;
    }
    return s;
}

/*
 * Given a list of formats for a screen, create a list
 * of visuals and depths for the screen which corespond to
 * the set which can be used with this version of cfb.
 */

Bool
miInitVisuals(VisualPtr *visualp, DepthPtr *depthp, int *nvisualp,
		int *ndepthp, int *rootDepthp, VisualID *defaultVisp,
		unsigned long sizes, int bitsPerRGB, int preferredVis)

{
    int		i, j = 0, k;
    VisualPtr	visual;
    DepthPtr	depth;
    VisualID	*vid;
    int		d, b;
    int		f;
    int		ndepth, nvisual;
    int		nvtype;
    int		vtype;
    miVisualsPtr   visuals, nextVisuals;
    int		*preferredCVCs, *prefp;
    int		first_depth;

    /* none specified, we'll guess from pixmap formats */
    if (!miVisuals) 
    {
    	for (f = 0; f < screenInfo.numPixmapFormats; f++) 
    	{
	    d = screenInfo.formats[f].depth;
	    b = screenInfo.formats[f].bitsPerPixel;
	    if (sizes & (1 << (b - 1)))
		vtype = miGetDefaultVisualMask(d);
	    else
		vtype = 0;
	    if (!miSetVisualTypes (d, vtype, bitsPerRGB, -1))
		return FALSE;
    	}
    }
    nvisual = 0;
    ndepth = 0;
    for (visuals = miVisuals; visuals; visuals = nextVisuals) 
    {
	nextVisuals = visuals->next;
	ndepth++;
	nvisual += visuals->count;
    }
    depth = xalloc (ndepth * sizeof (DepthRec));
    visual = xalloc (nvisual * sizeof (VisualRec));
    preferredCVCs = xalloc(ndepth * sizeof(int));
    if (!depth || !visual || !preferredCVCs)
    {
	xfree (depth);
	xfree (visual);
	xfree (preferredCVCs);
	return FALSE;
    }
    *depthp = depth;
    *visualp = visual;
    *ndepthp = ndepth;
    *nvisualp = nvisual;
    prefp = preferredCVCs;
    for (visuals = miVisuals; visuals; visuals = nextVisuals) 
    {
	nextVisuals = visuals->next;
	d = visuals->depth;
	vtype = visuals->visuals;
	nvtype = visuals->count;
	*prefp = visuals->preferredCVC;
	prefp++;
	vid = NULL;
	if (nvtype)
	{
	    vid = xalloc (nvtype * sizeof (VisualID));
	    if (!vid) {
		xfree(preferredCVCs);
		return FALSE;
	    }
	}
	depth->depth = d;
	depth->numVids = nvtype;
	depth->vids = vid;
	depth++;
	for (i = 0; i < NUM_PRIORITY; i++) {
	    if (! (vtype & (1 << miVisualPriority[i])))
		continue;
	    visual->class = miVisualPriority[i];
	    visual->bitsPerRGBValue = visuals->bitsPerRGB;
	    visual->ColormapEntries = 1 << d;
	    visual->nplanes = d;
	    visual->vid = *vid = FakeClientID (0);
	    switch (visual->class) {
	    case PseudoColor:
	    case GrayScale:
	    case StaticGray:
		visual->redMask = 0;
		visual->greenMask =  0;
		visual->blueMask =  0;
		visual->offsetRed  =  0;
		visual->offsetGreen = 0;
		visual->offsetBlue =  0;
		break;
	    case DirectColor:
	    case TrueColor:
		visual->ColormapEntries = _CE(d);
		/* fall through */
	    case StaticColor:
		visual->redMask =  visuals->redMask;
		visual->greenMask =  visuals->greenMask;
		visual->blueMask =  visuals->blueMask;
		visual->offsetRed  =  maskShift (visuals->redMask);
		visual->offsetGreen = maskShift (visuals->greenMask);
		visual->offsetBlue =  maskShift (visuals->blueMask);
	    }
	    vid++;
	    visual++;
	}
	xfree (visuals);
    }
    miVisuals = NULL;
    visual = *visualp;
    depth = *depthp;

    /*
     * if we did not supplyied by a preferred visual class
     * check if there is a preferred class in one of the depth
     * structures - if there is, we want to start looking for the
     * default visual/depth from that depth.
     */
    first_depth = 0;
    if (preferredVis < 0 && defaultColorVisualClass < 0 ) {
       for (i = 0; i < ndepth; i++) {
	  if (preferredCVCs[i] >= 0) {
	     first_depth = i;
	     break;
	  }
       }
    }

    for (i = first_depth; i < ndepth; i++)
    {
	int prefColorVisualClass = -1;

	if (defaultColorVisualClass >= 0)
	    prefColorVisualClass = defaultColorVisualClass;
	else if (preferredVis >= 0)
	    prefColorVisualClass = preferredVis;
	else if (preferredCVCs[i] >= 0)
	    prefColorVisualClass = preferredCVCs[i];

	if (*rootDepthp && *rootDepthp != depth[i].depth)
	    continue;
	
	for (j = 0; j < depth[i].numVids; j++)
	{
	    for (k = 0; k < nvisual; k++)
		if (visual[k].vid == depth[i].vids[j])
		    break;
	    if (k == nvisual)
		continue;
	    if (prefColorVisualClass < 0 ||
		visual[k].class == prefColorVisualClass)
		break;
	}
	if (j != depth[i].numVids)
	    break;
    }
    if (i == ndepth) {
	i = 0;
	j = 0;
    }
    *rootDepthp = depth[i].depth;
    *defaultVisp = depth[i].vids[j];
    xfree(preferredCVCs);

    return TRUE;
}