aboutsummaryrefslogtreecommitdiff
path: root/xorg-server/mi/micmap.c
blob: 1aeb359ba5e96031ba4bc2077d0a177ebcaaca66 (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
/*
 * Copyright (c) 1987, Oracle and/or its affiliates. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE 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"

DevPrivateKeyRec micmapScrPrivateKeyRec;

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

void
miInstallColormap(ColormapPtr pmap)
{
    ColormapPtr oldpmap = GetInstalledmiColormap(pmap->pScreen);

    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 */
        SetInstalledmiColormap(pmap->pScreen, pmap);
        WalkTree(pmap->pScreen, TellGainedMap, (char *) &pmap->mid);

    }
}

void
miUninstallColormap(ColormapPtr pmap)
{
    ColormapPtr curpmap = GetInstalledmiColormap(pmap->pScreen);

    if (pmap == curpmap) {
        if (pmap->mid != pmap->pScreen->defColormap) {
            dixLookupResourceByType((void **) &curpmap,
                                    pmap->pScreen->defColormap,
                                    RT_COLORMAP, serverClient, DixUseAccess);
            (*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)
{
    unsigned short zero = 0, ones = 0xFFFF;
    Pixel wp, bp;
    VisualPtr pVisual;
    ColormapPtr cmap;
    int alloctype;

    if (!dixRegisterPrivateKey(&micmapScrPrivateKeyRec, PRIVATE_SCREEN, 0))
        return FALSE;

    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;
        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;
    }

    (*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;
        free(v);
    }
}

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

    new = malloc(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 = malloc(ndepth * sizeof(DepthRec));
    visual = malloc(nvisual * sizeof(VisualRec));
    preferredCVCs = malloc(ndepth * sizeof(int));
    if (!depth || !visual || !preferredCVCs) {
        free(depth);
        free(visual);
        free(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 = malloc(nvtype * sizeof(VisualID));
            if (!vid) {
                free(depth);
                free(visual);
                free(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++;
        }
        free(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];
    free(preferredCVCs);

    return TRUE;
}