summaryrefslogtreecommitdiffstats
path: root/src/opengl/qegl.cpp
blob: 233293322d3b4b228e6634c4902327fe39a09af7 (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
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtOpenGL module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/

#include <QtGui/qpaintdevice.h>
#include <QtGui/qpixmap.h>
#include <QtGui/qwidget.h>
#include <QtCore/qdebug.h>
#include "qegl_p.h"

#if defined(QT_OPENGL_ES) || defined(QT_OPENVG)

QT_BEGIN_NAMESPACE

QEglContext::QEglContext()
{
    apiType = OpenGL;
    dpy = EGL_NO_DISPLAY;
    ctx = EGL_NO_CONTEXT;
    surf = EGL_NO_SURFACE;
    cfg = 0;
    share = false;
    reserved = 0;
}

QEglContext::~QEglContext()
{
    destroy();
}

bool QEglContext::isValid() const
{
    return (ctx != EGL_NO_CONTEXT);
}

bool QEglContext::isSharing() const
{
    return share;
}

// Open the EGL display associated with "device".
bool QEglContext::openDisplay(QPaintDevice *device)
{
    if (dpy == EGL_NO_DISPLAY)
        dpy = defaultDisplay(device);
    return (dpy != EGL_NO_DISPLAY);
}

// Choose a configuration that matches "properties".
bool QEglContext::chooseConfig
        (const QEglProperties& properties, PixelFormatMatch match)
{
    QEglProperties props(properties);
    EGLConfig *configs;
    EGLint matching, size;
    do {
        // Get the number of matching configurations for this set of properties.
        matching = 0;
        if (!eglChooseConfig(dpy, props.properties(), 0, 256, &matching) || !matching)
            continue;

        // If we want the best pixel format, then return the first
        // matching configuration.
        if (match == BestPixelFormat) {
            eglChooseConfig(dpy, props.properties(), &cfg, 1, &matching);
            if (matching < 1)
                continue;
            return true;
        }

        // Fetch all of the matching configurations and find the
        // first that matches the pixel format we wanted.
        size = matching;
        configs = new EGLConfig [size];
        eglChooseConfig(dpy, props.properties(), configs, size, &matching);
        for (EGLint index = 0; index < size; ++index) {
            EGLint red, green, blue, alpha;
            eglGetConfigAttrib(dpy, configs[index], EGL_RED_SIZE, &red);
            eglGetConfigAttrib(dpy, configs[index], EGL_GREEN_SIZE, &green);
            eglGetConfigAttrib(dpy, configs[index], EGL_BLUE_SIZE, &blue);
            eglGetConfigAttrib(dpy, configs[index], EGL_ALPHA_SIZE, &alpha);
            if (red == props.value(EGL_RED_SIZE) &&
                    green == props.value(EGL_GREEN_SIZE) &&
                    blue == props.value(EGL_BLUE_SIZE) &&
                    (props.value(EGL_ALPHA_SIZE) == EGL_DONT_CARE ||
                     alpha == props.value(EGL_ALPHA_SIZE))) {
                cfg = configs[index];
                delete [] configs;
                return true;
            }
        }
        delete [] configs;
    } while (props.reduceConfiguration());

#ifdef EGL_BIND_TO_TEXTURE_RGBA
    // Don't report an error just yet if we failed to get a pbuffer
    // configuration with texture rendering.  Only report failure if
    // we cannot get any pbuffer configurations at all.
    if (props.value(EGL_BIND_TO_TEXTURE_RGBA) == EGL_DONT_CARE &&
        props.value(EGL_BIND_TO_TEXTURE_RGB) == EGL_DONT_CARE)
#endif
    {
        qWarning() << "QEglContext::chooseConfig(): Could not find a suitable EGL configuration";
        qWarning() << "Requested:" << props.toString();
        qWarning() << "Available:";
        dumpAllConfigs();
    }
    return false;
}

// Create the EGLContext.
bool QEglContext::createContext(QEglContext *shareContext)
{
    // We need to select the correct API before calling eglCreateContext().
#ifdef EGL_OPENGL_ES_API
    if (apiType == OpenGL)
        eglBindAPI(EGL_OPENGL_ES_API);
#endif
#ifdef EGL_OPENVG_API
    if (apiType == OpenVG)
        eglBindAPI(EGL_OPENVG_API);
#endif

    // Create a new context for the configuration.
    QEglProperties contextProps;
#if defined(QT_OPENGL_ES_2)
    if (apiType == OpenGL)
        contextProps.setValue(EGL_CONTEXT_CLIENT_VERSION, 2);
#endif
    if (shareContext && shareContext->ctx == EGL_NO_CONTEXT)
        shareContext = 0;
    if (shareContext) {
        ctx = eglCreateContext(dpy, cfg, shareContext->ctx, contextProps.properties());
        if (ctx == EGL_NO_CONTEXT) {
            qWarning() << "QEglContext::createContext(): Could not share context:" << errorString(eglGetError());
            shareContext = 0;
        }
    }
    if (ctx == EGL_NO_CONTEXT) {
        ctx = eglCreateContext(dpy, cfg, 0, contextProps.properties());
        if (ctx == EGL_NO_CONTEXT) {
            qWarning() << "QEglContext::createContext(): Unable to create EGL context:" << errorString(eglGetError());
            return false;
        }
    }
    share = (shareContext != 0);
    return true;
}

// Recreate the surface for a paint device because the native id has changed.
bool QEglContext::recreateSurface(QPaintDevice *device)
{
    // Bail out if the surface has not been created for the first time yet.
    if (surf == EGL_NO_SURFACE)
        return true;

    // Destroy the old surface.
    eglDestroySurface(dpy, surf);

    // Create a new one.
    return createSurface(device);
}

void QEglContext::destroy()
{
    if (ctx != EGL_NO_CONTEXT)
        eglDestroyContext(dpy, ctx);
    dpy = EGL_NO_DISPLAY;
    ctx = EGL_NO_CONTEXT;
    surf = EGL_NO_SURFACE;
    cfg = 0;
    share = false;
}

bool QEglContext::makeCurrent()
{
    if(ctx == EGL_NO_CONTEXT) {
        qWarning() << "QEglContext::makeCurrent(): Cannot make invalid context current";
        return false;
    }

    bool ok = eglMakeCurrent(dpy, surf, surf, ctx);
    if (!ok) {
        EGLint err = eglGetError();
        qWarning() << "QEglContext::makeCurrent():" << errorString(err);
    }
    return ok;
}

bool QEglContext::doneCurrent()
{
    // If the context is invalid, we assume that an error was reported
    // when makeCurrent() was called.
    if (ctx == EGL_NO_CONTEXT)
        return false;

    // We need to select the correct API before calling eglMakeCurrent()
    // with EGL_NO_CONTEXT because threads can have both OpenGL and OpenVG
    // contexts active at the same time.
#ifdef EGL_OPENGL_ES_API
    if (apiType == OpenGL)
        eglBindAPI(EGL_OPENGL_ES_API);
#endif
#ifdef EGL_OPENVG_API
    if (apiType == OpenVG)
        eglBindAPI(EGL_OPENVG_API);
#endif

    bool ok = eglMakeCurrent(dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
    if (!ok) {
        EGLint err = eglGetError();
        qWarning() << "QEglContext::doneCurrent():" << errorString(err);
    }
    return ok;
}

bool QEglContext::swapBuffers()
{
    if(ctx == EGL_NO_CONTEXT)
        return false;

    bool ok = eglSwapBuffers(dpy, surf);
    if (!ok) {
        EGLint err = eglGetError();
        qWarning() << "QEglContext::swapBuffers():" << errorString(err);
    }
    return ok;
}

// Wait for native rendering operations to complete before starting
// to use OpenGL/OpenVG operations.
void QEglContext::waitNative()
{
#ifdef EGL_CORE_NATIVE_ENGINE
    eglWaitNative(EGL_CORE_NATIVE_ENGINE);
#endif
}

// Wait for client OpenGL/OpenVG operations to complete before
// using native rendering operations.
void QEglContext::waitClient()
{
#ifdef EGL_OPENGL_ES_API
    if (apiType == OpenGL) {
        eglBindAPI(EGL_OPENGL_ES_API);
        eglWaitClient();
    }
#else
    if (apiType == OpenGL)
        eglWaitGL();
#endif
#ifdef EGL_OPENVG_API
    if (apiType == OpenVG) {
        eglBindAPI(EGL_OPENVG_API);
        eglWaitClient();
    }
#endif
}

// Query the actual size of the EGL surface.
QSize QEglContext::surfaceSize() const
{
    int w, h;
    eglQuerySurface(dpy, surf, EGL_WIDTH, &w);
    eglQuerySurface(dpy, surf, EGL_HEIGHT, &h);
    return QSize(w, h);
}

// Query the value of a configuration attribute.
bool QEglContext::configAttrib(int name, EGLint *value) const
{
    return eglGetConfigAttrib(dpy, cfg, name, value);
}

// Retrieve all of the properties on "cfg".  If zero, return
// the context's configuration.
QEglProperties QEglContext::configProperties(EGLConfig cfg) const
{
    if (!cfg)
        cfg = config();
    QEglProperties props;
    for (int name = 0x3020; name <= 0x304F; ++name) {
        EGLint value;
        if (name != EGL_NONE && eglGetConfigAttrib(dpy, cfg, name, &value))
            props.setValue(name, value);
    }
    eglGetError();  // Clear the error state.
    return props;
}

// Initialize and return the default display.
EGLDisplay QEglContext::defaultDisplay(QPaintDevice *device)
{
    static EGLDisplay dpy = EGL_NO_DISPLAY;
    if (dpy == EGL_NO_DISPLAY) {
        dpy = getDisplay(device);
        if (dpy == EGL_NO_DISPLAY) {
            qWarning() << "QEglContext::defaultDisplay(): Cannot open EGL display";
            return EGL_NO_DISPLAY;
        }
        if (!eglInitialize(dpy, NULL, NULL)) {
            EGLint err = eglGetError();
            qWarning() << "QEglContext::defaultDisplay(): Cannot initialize EGL display:" << errorString(err);
            return EGL_NO_DISPLAY;
        }
#ifdef EGL_OPENGL_ES_API
        eglBindAPI(EGL_OPENGL_ES_API);
#endif
    }
    return dpy;
}

// Return the error string associated with a specific code.
QString QEglContext::errorString(int code)
{
    static const char * const errors[] = {
        "Success (0x3000)",                 // No tr
        "Not initialized (0x3001)",         // No tr
        "Bad access (0x3002)",              // No tr
        "Bad alloc (0x3003)",               // No tr
        "Bad attribute (0x3004)",           // No tr
        "Bad config (0x3005)",              // No tr
        "Bad context (0x3006)",             // No tr
        "Bad current surface (0x3007)",     // No tr
        "Bad display (0x3008)",             // No tr
        "Bad match (0x3009)",               // No tr
        "Bad native pixmap (0x300A)",       // No tr
        "Bad native window (0x300B)",       // No tr
        "Bad parameter (0x300C)",           // No tr
        "Bad surface (0x300D)",             // No tr
        "Context lost (0x300E)"             // No tr
    };
    if (code >= 0x3000 && code <= 0x300E) {
        return QString::fromLatin1(errors[code - 0x3000]);
    } else {
        return QLatin1String("0x") + QString::number(code, 16);
    }
}

// Dump all of the EGL configurations supported by the system.
void QEglContext::dumpAllConfigs()
{
    QEglProperties props;
    EGLint count = 0;
    if (!eglGetConfigs(dpy, 0, 0, &count))
        return;
    if (count < 1)
        return;
    EGLConfig *configs = new EGLConfig [count];
    eglGetConfigs(dpy, configs, count, &count);
    for (EGLint index = 0; index < count; ++index) {
        props = configProperties(configs[index]);
        qWarning() << props.toString();
    }
    delete [] configs;
}

// Initialize a property block.
QEglProperties::QEglProperties()
{
    props.append(EGL_NONE);
}

// Fetch the current value associated with a property.
int QEglProperties::value(int name) const
{
    for (int index = 0; index < (props.size() - 1); index += 2) {
        if (props[index] == name)
            return props[index + 1];
    }
    return EGL_DONT_CARE;
}

// Set the value associated with a property, replacing an existing
// value if there is one.
void QEglProperties::setValue(int name, int value)
{
    for (int index = 0; index < (props.size() - 1); index += 2) {
        if (props[index] == name) {
            props[index + 1] = value;
            return;
        }
    }
    props[props.size() - 1] = name;
    props.append(value);
    props.append(EGL_NONE);
}

// Remove a property value.  Returns false if the property is not present.
bool QEglProperties::removeValue(int name)
{
    for (int index = 0; index < (props.size() - 1); index += 2) {
        if (props[index] == name) {
            while ((index + 2) < props.size()) {
                props[index] = props[index + 2];
                ++index;
            }
            props.resize(props.size() - 2);
            return true;
        }
    }
    return false;
}

// Sets the red, green, blue, and alpha sizes based on a pixel format.
// Normally used to match a configuration request to the screen format.
void QEglProperties::setPixelFormat(QImage::Format pixelFormat)
{
    int red, green, blue, alpha;
    switch (pixelFormat) {
        case QImage::Format_RGB32:
        case QImage::Format_RGB888:
            red = green = blue = 8; alpha = 0; break;
        case QImage::Format_ARGB32:
        case QImage::Format_ARGB32_Premultiplied:
            red = green = blue = alpha = 8; break;
        case QImage::Format_RGB16:
            red = 5; green = 6; blue = 5; alpha = 0; break;
        case QImage::Format_ARGB8565_Premultiplied:
            red = 5; green = 6; blue = 5; alpha = 8; break;
        case QImage::Format_RGB666:
            red = green = blue = 6; alpha = 0; break;
        case QImage::Format_ARGB6666_Premultiplied:
            red = green = blue = alpha = 6; break;
        case QImage::Format_RGB555:
            red = green = blue = 5; alpha = 0; break;
        case QImage::Format_ARGB8555_Premultiplied:
            red = green = blue = 5; alpha = 8; break;
        case QImage::Format_RGB444:
            red = green = blue = 4; alpha = 0; break;
        case QImage::Format_ARGB4444_Premultiplied:
            red = green = blue = alpha = 4; break;
        default:
            qWarning() << "QEglProperties::setPixelFormat(): Unsupported pixel format";
            red = green = blue = alpha = 1; break;
    }
    setValue(EGL_RED_SIZE, red);
    setValue(EGL_GREEN_SIZE, green);
    setValue(EGL_BLUE_SIZE, blue);
    setValue(EGL_ALPHA_SIZE, alpha);
}

void QEglProperties::setRenderableType(int api)
{
#if defined(EGL_RENDERABLE_TYPE)
#if defined(QT_OPENGL_ES_2)
    if (api == QEglContext::OpenGL)
        setValue(EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT);
#elif defined(QT_OPENGL_ES)
    if (api == QEglContext::OpenGL)
        setValue(EGL_RENDERABLE_TYPE, EGL_OPENGL_ES_BIT);
#endif
#if defined(EGL_OPENVG_BIT)
    if (api == QEglContext::OpenVG)
        setValue(EGL_RENDERABLE_TYPE, EGL_OPENVG_BIT);
#endif
#else
    Q_UNUSED(api);
#endif
}

// Reduce the complexity of a configuration request to ask for less
// because the previous request did not result in success.  Returns
// true if the complexity was reduced, or false if no further
// reductions in complexity are possible.
bool QEglProperties::reduceConfiguration()
{
    if (removeValue(EGL_SAMPLE_BUFFERS)) {
        removeValue(EGL_SAMPLES);
        return true;
    }
    if (removeValue(EGL_ALPHA_SIZE))
        return true;
    if (removeValue(EGL_STENCIL_SIZE))
        return true;
    if (removeValue(EGL_DEPTH_SIZE))
        return true;
    return false;
}

static void addTag(QString& str, const QString& tag)
{
    int lastnl = str.lastIndexOf(QLatin1String("\n"));
    if (lastnl == -1)
        lastnl = 0;
    if ((str.length() - lastnl) >= 50)
        str += QLatin1String("\n   ");
    str += tag;
}

// Convert a property list to a string suitable for debug output.
QString QEglProperties::toString() const
{
    QString str;
    int val;

    val = value(EGL_CONFIG_ID);
    if (val != EGL_DONT_CARE) {
        str += QLatin1String("id=");
        str += QString::number(val);
        str += QLatin1String(" ");
    }

#ifdef EGL_RENDERABLE_TYPE
    val = value(EGL_RENDERABLE_TYPE);
    if (val != EGL_DONT_CARE) {
        str += QLatin1String("type=");
        QStringList types;
        if ((val & EGL_OPENGL_ES_BIT) != 0)
            types += QLatin1String("es1");
#ifdef EGL_OPENGL_ES2_BIT
        if ((val & EGL_OPENGL_ES2_BIT) != 0)
            types += QLatin1String("es2");
#endif
        if ((val & EGL_OPENVG_BIT) != 0)
            types += QLatin1String("vg");
        if ((val & ~7) != 0)
            types += QString::number(val);
        str += types.join(QLatin1String(","));
    } else {
        str += QLatin1String("type=any");
    }
#else
    str += QLatin1String("type=es1");
#endif

    int red = value(EGL_RED_SIZE);
    int green = value(EGL_GREEN_SIZE);
    int blue = value(EGL_BLUE_SIZE);
    int alpha = value(EGL_ALPHA_SIZE);
    int bufferSize = value(EGL_BUFFER_SIZE);
    if (bufferSize == (red + green + blue + alpha))
        bufferSize = EGL_DONT_CARE;
    str += QLatin1String(" rgba=");
    str += QString::number(red);
    str += QLatin1String(",");
    str += QString::number(green);
    str += QLatin1String(",");
    str += QString::number(blue);
    str += QLatin1String(",");
    str += QString::number(alpha);
    if (bufferSize != EGL_DONT_CARE) {
        // Only report buffer size if different than r+g+b+a.
        str += QLatin1String(" buffer-size=");
        str += QString::number(bufferSize);
    }

#ifdef EGL_COLOR_BUFFER_TYPE
    val = value(EGL_COLOR_BUFFER_TYPE);
    if (val == EGL_LUMINANCE_BUFFER) {
        addTag(str, QLatin1String(" color-buffer-type=luminance"));
    } else if (val != EGL_DONT_CARE && val != EGL_RGB_BUFFER) {
        addTag(str, QLatin1String(" color-buffer-type="));
        str += QString::number(val, 16);
    }
#endif

    val = value(EGL_DEPTH_SIZE);
    if (val != EGL_DONT_CARE) {
        addTag(str, QLatin1String(" depth="));
        str += QString::number(val);
    }

    val = value(EGL_STENCIL_SIZE);
    if (val != EGL_DONT_CARE) {
        addTag(str, QLatin1String(" stencil="));
        str += QString::number(val);
    }

    val = value(EGL_SURFACE_TYPE);
    if (val != EGL_DONT_CARE) {
        addTag(str, QLatin1String(" surface-type="));
        QStringList types;
        if ((val & EGL_WINDOW_BIT) != 0)
            types += QLatin1String("window");
        if ((val & EGL_PIXMAP_BIT) != 0)
            types += QLatin1String("pixmap");
        if ((val & EGL_PBUFFER_BIT) != 0)
            types += QLatin1String("pbuffer");
#ifdef EGL_VG_COLORSPACE_LINEAR_BIT
        if ((val & EGL_VG_COLORSPACE_LINEAR_BIT) != 0)
            types += QLatin1String("vg-colorspace-linear");
#endif
#ifdef EGL_VG_ALPHA_FORMAT_PRE_BIT
        if ((val & EGL_VG_ALPHA_FORMAT_PRE_BIT) != 0)
            types += QLatin1String("vg-alpha-format-pre");
#endif
        if ((val & ~(EGL_WINDOW_BIT | EGL_PIXMAP_BIT | EGL_PBUFFER_BIT
#ifdef EGL_VG_COLORSPACE_LINEAR_BIT
                     | EGL_VG_COLORSPACE_LINEAR_BIT
#endif
#ifdef EGL_VG_ALPHA_FORMAT_PRE_BIT
                     | EGL_VG_ALPHA_FORMAT_PRE_BIT
#endif
                     )) != 0) {
            types += QString::number(val);
        }
        str += types.join(QLatin1String(","));
    }

    val = value(EGL_CONFIG_CAVEAT);
    if (val != EGL_DONT_CARE) {
        addTag(str, QLatin1String(" caveat="));
        if (val == EGL_NONE)
            str += QLatin1String("none");
        else if (val == EGL_SLOW_CONFIG)
            str += QLatin1String("slow");
        else if (val == EGL_NON_CONFORMANT_CONFIG)
            str += QLatin1String("non-conformant");
        else
            str += QString::number(val, 16);
    }

    val = value(EGL_LEVEL);
    if (val != EGL_DONT_CARE) {
        addTag(str, QLatin1String(" level="));
        str += QString::number(val);
    }

    int width, height, pixels;
    width = value(EGL_MAX_PBUFFER_WIDTH);
    height = value(EGL_MAX_PBUFFER_HEIGHT);
    pixels = value(EGL_MAX_PBUFFER_PIXELS);
    if (height != EGL_DONT_CARE || width != EGL_DONT_CARE) {
        addTag(str, QLatin1String(" max-pbuffer-size="));
        str += QString::number(width);
        str += QLatin1String("x");
        str += QString::number(height);
        if (pixels != (width * height)) {
            addTag(str, QLatin1String(" max-pbuffer-pixels="));
            str += QString::number(pixels);
        }
    }

    val = value(EGL_NATIVE_RENDERABLE);
    if (val != EGL_DONT_CARE) {
        if (val)
            addTag(str, QLatin1String(" native-renderable=true"));
        else
            addTag(str, QLatin1String(" native-renderable=false"));
    }

    val = value(EGL_NATIVE_VISUAL_ID);
    if (val != EGL_DONT_CARE) {
        addTag(str, QLatin1String(" visual-id="));
        str += QString::number(val);
    }

    val = value(EGL_NATIVE_VISUAL_TYPE);
    if (val != EGL_DONT_CARE) {
        addTag(str, QLatin1String(" visual-type="));
        str += QString::number(val);
    }

#ifdef EGL_PRESERVED_RESOURCES
    val = value(EGL_PRESERVED_RESOURCES);
    if (val != EGL_DONT_CARE) {
        if (val)
            addTag(str, QLatin1String(" preserved-resources=true"));
        else
            addTag(str, QLatin1String(" preserved-resources=false"));
    }
#endif

    val = value(EGL_SAMPLES);
    if (val != EGL_DONT_CARE) {
        addTag(str, QLatin1String(" samples="));
        str += QString::number(val);
    }

    val = value(EGL_SAMPLE_BUFFERS);
    if (val != EGL_DONT_CARE) {
        addTag(str, QLatin1String(" sample-buffers="));
        str += QString::number(val);
    }

    val = value(EGL_TRANSPARENT_TYPE);
    if (val == EGL_TRANSPARENT_RGB) {
        addTag(str, QLatin1String(" transparent-rgb="));
        str += QString::number(value(EGL_TRANSPARENT_RED_VALUE));
        str += QLatin1String(",");
        str += QString::number(value(EGL_TRANSPARENT_GREEN_VALUE));
        str += QLatin1String(",");
        str += QString::number(value(EGL_TRANSPARENT_BLUE_VALUE));
    }

#if defined(EGL_BIND_TO_TEXTURE_RGB) && defined(EGL_BIND_TO_TEXTURE_RGBA)
    val = value(EGL_BIND_TO_TEXTURE_RGB);
    int val2 = value(EGL_BIND_TO_TEXTURE_RGBA);
    if (val != EGL_DONT_CARE || val2 != EGL_DONT_CARE) {
        addTag(str, QLatin1String(" bind-texture="));
        if (val == EGL_TRUE)
            str += QLatin1String("rgb");
        else
            str += QLatin1String("no-rgb");
        if (val2 == EGL_TRUE)
            str += QLatin1String(",rgba");
        else
            str += QLatin1String(",no-rgba");
    }
#endif

#ifdef EGL_MIN_SWAP_INTERVAL
    val = value(EGL_MIN_SWAP_INTERVAL);
    if (val != EGL_DONT_CARE) {
        addTag(str, QLatin1String(" min-swap-interval="));
        str += QString::number(val);
    }
#endif

#ifdef EGL_MIN_SWAP_INTERVAL
    val = value(EGL_MAX_SWAP_INTERVAL);
    if (val != EGL_DONT_CARE) {
        addTag(str, QLatin1String(" max-swap-interval="));
        str += QString::number(val);
    }
#endif

#ifdef EGL_LUMINANCE_SIZE
    val = value(EGL_LUMINANCE_SIZE);
    if (val != EGL_DONT_CARE) {
        addTag(str, QLatin1String(" luminance="));
        str += QString::number(val);
    }
#endif

#ifdef EGL_ALPHA_MASK_SIZE
    val = value(EGL_ALPHA_MASK_SIZE);
    if (val != EGL_DONT_CARE) {
        addTag(str, QLatin1String(" alpha-mask="));
        str += QString::number(val);
    }
#endif

#ifdef EGL_CONFORMANT
    val = value(EGL_CONFORMANT);
    if (val != EGL_DONT_CARE) {
        if (val)
            addTag(str, QLatin1String(" conformant=true"));
        else
            addTag(str, QLatin1String(" conformant=false"));
    }
#endif

    return str;
}

QT_END_NAMESPACE

#endif // QT_OPENGL_ES || QT_OPENVG