summaryrefslogtreecommitdiff
path: root/src/VBox/Frontends/VirtualBox/src/VBoxGLSupportInfo.cpp
blob: 2500536c5dbc558cb4f56f3fd9c56657a8061d72 (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
/* $Id: VBoxGLSupportInfo.cpp $ */
/** @file
 *
 * VBox frontends: Qt GUI ("VirtualBox"):
 * OpenGL support info used for 2D support detection
 */

/*
 * Copyright (C) 2009 Oracle Corporation
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.virtualbox.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software
 * Foundation, in version 2 as it comes in the "COPYING" file of the
 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
 */

#ifdef VBOX_WITH_PRECOMPILED_HEADERS
# include "precomp.h"
#else  /* !VBOX_WITH_PRECOMPILED_HEADERS */
#include <iprt/assert.h>
#include <iprt/log.h>
#include <iprt/err.h>
#include <iprt/env.h>
#include <iprt/param.h>
#include <iprt/path.h>
#include <iprt/process.h>
#include <iprt/string.h>
#include <iprt/time.h>
#include <iprt/thread.h>

#include <QGLWidget>
#include <QGLContext>

#include <VBox/VBoxGL2D.h>
#include "VBoxFBOverlayCommon.h"
#endif /* !VBOX_WITH_PRECOMPILED_HEADERS */

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

/* functions */

PFNVBOXVHWA_ACTIVE_TEXTURE vboxglActiveTexture = NULL;
PFNVBOXVHWA_MULTI_TEX_COORD2I vboxglMultiTexCoord2i = NULL;
PFNVBOXVHWA_MULTI_TEX_COORD2D vboxglMultiTexCoord2d = NULL;
PFNVBOXVHWA_MULTI_TEX_COORD2F vboxglMultiTexCoord2f = NULL;


PFNVBOXVHWA_CREATE_SHADER   vboxglCreateShader  = NULL;
PFNVBOXVHWA_SHADER_SOURCE   vboxglShaderSource  = NULL;
PFNVBOXVHWA_COMPILE_SHADER  vboxglCompileShader = NULL;
PFNVBOXVHWA_DELETE_SHADER   vboxglDeleteShader  = NULL;

PFNVBOXVHWA_CREATE_PROGRAM  vboxglCreateProgram = NULL;
PFNVBOXVHWA_ATTACH_SHADER   vboxglAttachShader  = NULL;
PFNVBOXVHWA_DETACH_SHADER   vboxglDetachShader  = NULL;
PFNVBOXVHWA_LINK_PROGRAM    vboxglLinkProgram   = NULL;
PFNVBOXVHWA_USE_PROGRAM     vboxglUseProgram    = NULL;
PFNVBOXVHWA_DELETE_PROGRAM  vboxglDeleteProgram = NULL;

PFNVBOXVHWA_IS_SHADER       vboxglIsShader      = NULL;
PFNVBOXVHWA_GET_SHADERIV    vboxglGetShaderiv   = NULL;
PFNVBOXVHWA_IS_PROGRAM      vboxglIsProgram     = NULL;
PFNVBOXVHWA_GET_PROGRAMIV   vboxglGetProgramiv  = NULL;
PFNVBOXVHWA_GET_ATTACHED_SHADERS vboxglGetAttachedShaders = NULL;
PFNVBOXVHWA_GET_SHADER_INFO_LOG  vboxglGetShaderInfoLog   = NULL;
PFNVBOXVHWA_GET_PROGRAM_INFO_LOG vboxglGetProgramInfoLog  = NULL;

PFNVBOXVHWA_GET_UNIFORM_LOCATION vboxglGetUniformLocation = NULL;

PFNVBOXVHWA_UNIFORM1F vboxglUniform1f = NULL;
PFNVBOXVHWA_UNIFORM2F vboxglUniform2f = NULL;
PFNVBOXVHWA_UNIFORM3F vboxglUniform3f = NULL;
PFNVBOXVHWA_UNIFORM4F vboxglUniform4f = NULL;

PFNVBOXVHWA_UNIFORM1I vboxglUniform1i = NULL;
PFNVBOXVHWA_UNIFORM2I vboxglUniform2i = NULL;
PFNVBOXVHWA_UNIFORM3I vboxglUniform3i = NULL;
PFNVBOXVHWA_UNIFORM4I vboxglUniform4i = NULL;

PFNVBOXVHWA_GEN_BUFFERS vboxglGenBuffers = NULL;
PFNVBOXVHWA_DELETE_BUFFERS vboxglDeleteBuffers = NULL;
PFNVBOXVHWA_BIND_BUFFER vboxglBindBuffer = NULL;
PFNVBOXVHWA_BUFFER_DATA vboxglBufferData = NULL;
PFNVBOXVHWA_MAP_BUFFER vboxglMapBuffer = NULL;
PFNVBOXVHWA_UNMAP_BUFFER vboxglUnmapBuffer = NULL;

PFNVBOXVHWA_IS_FRAMEBUFFER vboxglIsFramebuffer = NULL;
PFNVBOXVHWA_BIND_FRAMEBUFFER vboxglBindFramebuffer = NULL;
PFNVBOXVHWA_DELETE_FRAMEBUFFERS vboxglDeleteFramebuffers = NULL;
PFNVBOXVHWA_GEN_FRAMEBUFFERS vboxglGenFramebuffers = NULL;
PFNVBOXVHWA_CHECK_FRAMEBUFFER_STATUS vboxglCheckFramebufferStatus = NULL;
PFNVBOXVHWA_FRAMEBUFFER_TEXTURE1D vboxglFramebufferTexture1D = NULL;
PFNVBOXVHWA_FRAMEBUFFER_TEXTURE2D vboxglFramebufferTexture2D = NULL;
PFNVBOXVHWA_FRAMEBUFFER_TEXTURE3D vboxglFramebufferTexture3D = NULL;
PFNVBOXVHWA_GET_FRAMEBUFFER_ATTACHMENT_PARAMETRIV vboxglGetFramebufferAttachmentParameteriv = NULL;

#define VBOXVHWA_GETPROCADDRESS(_c, _t, _n) ((_t)(uintptr_t)(_c).getProcAddress(QString(_n)))

#define VBOXVHWA_PFNINIT_SAME(_c, _t, _v, _rc) \
    do { \
        if((vboxgl##_v = VBOXVHWA_GETPROCADDRESS(_c, _t, "gl"#_v)) == NULL) \
        { \
            VBOXQGLLOGREL(("ERROR: '%s' function not found\n", "gl"#_v));\
            AssertBreakpoint(); \
            if((vboxgl##_v = VBOXVHWA_GETPROCADDRESS(_c, _t, "gl"#_v"ARB")) == NULL) \
            { \
                VBOXQGLLOGREL(("ERROR: '%s' function not found\n", "gl"#_v"ARB"));\
                AssertBreakpoint(); \
                if((vboxgl##_v = VBOXVHWA_GETPROCADDRESS(_c, _t, "gl"#_v"EXT")) == NULL) \
                { \
                    VBOXQGLLOGREL(("ERROR: '%s' function not found\n", "gl"#_v"EXT"));\
                    AssertBreakpoint(); \
                    (_rc)++; \
                } \
            } \
        } \
    }while(0)

#define VBOXVHWA_PFNINIT(_c, _t, _v, _f,_rc) \
    do { \
        if((vboxgl##_v = VBOXVHWA_GETPROCADDRESS(_c, _t, "gl"#_f)) == NULL) \
        { \
            VBOXQGLLOGREL(("ERROR: '%s' function is not found\n", "gl"#_f));\
            AssertBreakpoint(); \
            (_rc)++; \
        } \
    }while(0)

#define VBOXVHWA_PFNINIT_OBJECT_ARB(_c, _t, _v, _rc) \
        do { \
            if((vboxgl##_v = VBOXVHWA_GETPROCADDRESS(_c, _t, "gl"#_v"ObjectARB")) == NULL) \
            { \
                VBOXQGLLOGREL(("ERROR: '%s' function is not found\n", "gl"#_v"ObjectARB"));\
                AssertBreakpoint(); \
                (_rc)++; \
            } \
        }while(0)

#define VBOXVHWA_PFNINIT_ARB(_c, _t, _v, _rc) \
        do { \
            if((vboxgl##_v = VBOXVHWA_GETPROCADDRESS(_c, _t, "gl"#_v"ARB")) == NULL) \
            { \
                VBOXQGLLOGREL(("ERROR: '%s' function is not found\n", "gl"#_v"ARB"));\
                AssertBreakpoint(); \
                (_rc)++; \
            } \
        }while(0)

#define VBOXVHWA_PFNINIT_EXT(_c, _t, _v, _rc) \
        do { \
            if((vboxgl##_v = VBOXVHWA_GETPROCADDRESS(_c, _t, "gl"#_v"EXT")) == NULL) \
            { \
                VBOXQGLLOGREL(("ERROR: '%s' function is not found\n", "gl"#_v"EXT"));\
                AssertBreakpoint(); \
                (_rc)++; \
            } \
        }while(0)

static int vboxVHWAGlParseSubver(const GLubyte * ver, const GLubyte ** pNext, bool bSpacePrefixAllowed)
{
    int val = 0;

    for(;;++ver)
    {
        if(*ver >= '0' && *ver <= '9')
        {
            if(!val)
            {
                if(*ver == '0')
                    continue;
            }
            else
            {
                val *= 10;
            }
            val += *ver - '0';
        }
        else if(*ver == '.')
        {
            *pNext = ver+1;
            break;
        }
        else if(*ver == '\0')
        {
            *pNext = NULL;
            break;
        }
        else if(*ver == ' ' || *ver == '\t' ||  *ver == 0x0d || *ver == 0x0a)
        {
            if(bSpacePrefixAllowed)
            {
                if(!val)
                {
                    continue;
                }
            }

            /* treat this as the end ov version string */
            *pNext = NULL;
            break;
        }
        else
        {
            Assert(0);
            val = -1;
            break;
        }
    }

    return val;
}

/* static */
int VBoxGLInfo::parseVersion(const GLubyte * ver)
{
    int iVer = vboxVHWAGlParseSubver(ver, &ver, true);
    if(iVer)
    {
        iVer <<= 16;
        if(ver)
        {
            int tmp = vboxVHWAGlParseSubver(ver, &ver, false);
            if(tmp >= 0)
            {
                iVer |= tmp << 8;
                if(ver)
                {
                    tmp = vboxVHWAGlParseSubver(ver, &ver, false);
                    if(tmp >= 0)
                    {
                        iVer |= tmp;
                    }
                    else
                    {
                        Assert(0);
                        iVer = -1;
                    }
                }
            }
            else
            {
                Assert(0);
                iVer = -1;
            }
        }
    }
    return iVer;
}

void VBoxGLInfo::init(const QGLContext * pContext)
{
    if(mInitialized)
        return;

    mInitialized = true;

    if (!QGLFormat::hasOpenGL())
    {
        VBOXQGLLOGREL (("no gl support available\n"));
        return;
    }

//    pContext->makeCurrent();

    const GLubyte * str;
    VBOXQGL_CHECKERR(
            str = glGetString(GL_VERSION);
            );

    if(str)
    {
        VBOXQGLLOGREL (("gl version string: 0%s\n", str));

        mGLVersion = parseVersion (str);
        Assert(mGLVersion > 0);
        if(mGLVersion < 0)
        {
            mGLVersion = 0;
        }
        else
        {
            VBOXQGLLOGREL (("gl version: 0x%x\n", mGLVersion));
            VBOXQGL_CHECKERR(
                    str = glGetString (GL_EXTENSIONS);
                    );

            VBOXQGLLOGREL (("gl extensions: %s\n", str));

            const char * pos = strstr((const char *)str, "GL_ARB_multitexture");
            m_GL_ARB_multitexture = pos != NULL;
            VBOXQGLLOGREL (("GL_ARB_multitexture: %d\n", m_GL_ARB_multitexture));

            pos = strstr((const char *)str, "GL_ARB_shader_objects");
            m_GL_ARB_shader_objects = pos != NULL;
            VBOXQGLLOGREL (("GL_ARB_shader_objects: %d\n", m_GL_ARB_shader_objects));

            pos = strstr((const char *)str, "GL_ARB_fragment_shader");
            m_GL_ARB_fragment_shader = pos != NULL;
            VBOXQGLLOGREL (("GL_ARB_fragment_shader: %d\n", m_GL_ARB_fragment_shader));

            pos = strstr((const char *)str, "GL_ARB_pixel_buffer_object");
            m_GL_ARB_pixel_buffer_object = pos != NULL;
            VBOXQGLLOGREL (("GL_ARB_pixel_buffer_object: %d\n", m_GL_ARB_pixel_buffer_object));

            pos = strstr((const char *)str, "GL_ARB_texture_rectangle");
            m_GL_ARB_texture_rectangle = pos != NULL;
            VBOXQGLLOGREL (("GL_ARB_texture_rectangle: %d\n", m_GL_ARB_texture_rectangle));

            pos = strstr((const char *)str, "GL_EXT_texture_rectangle");
            m_GL_EXT_texture_rectangle = pos != NULL;
            VBOXQGLLOGREL (("GL_EXT_texture_rectangle: %d\n", m_GL_EXT_texture_rectangle));

            pos = strstr((const char *)str, "GL_NV_texture_rectangle");
            m_GL_NV_texture_rectangle = pos != NULL;
            VBOXQGLLOGREL (("GL_NV_texture_rectangle: %d\n", m_GL_NV_texture_rectangle));

            pos = strstr((const char *)str, "GL_ARB_texture_non_power_of_two");
            m_GL_ARB_texture_non_power_of_two = pos != NULL;
            VBOXQGLLOGREL (("GL_ARB_texture_non_power_of_two: %d\n", m_GL_ARB_texture_non_power_of_two));

            pos = strstr((const char *)str, "GL_EXT_framebuffer_object");
            m_GL_EXT_framebuffer_object = pos != NULL;
            VBOXQGLLOGREL (("GL_EXT_framebuffer_object: %d\n", m_GL_EXT_framebuffer_object));


            initExtSupport(*pContext);
        }
    }
    else
    {
        VBOXQGLLOGREL (("failed to make the context current, treating as unsupported\n"));
    }
}

void VBoxGLInfo::initExtSupport(const QGLContext & context)
{
    int rc = 0;
    do
    {
        rc = 0;
        mMultiTexNumSupported = 1; /* default, 1 means not supported */
        if(mGLVersion >= 0x010201) /* ogl >= 1.2.1 */
        {
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_ACTIVE_TEXTURE, ActiveTexture, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_MULTI_TEX_COORD2I, MultiTexCoord2i, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_MULTI_TEX_COORD2D, MultiTexCoord2d, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_MULTI_TEX_COORD2F, MultiTexCoord2f, rc);
        }
        else if(m_GL_ARB_multitexture)
        {
            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_ACTIVE_TEXTURE, ActiveTexture, rc);
            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_MULTI_TEX_COORD2I, MultiTexCoord2i, rc);
            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_MULTI_TEX_COORD2D, MultiTexCoord2d, rc);
            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_MULTI_TEX_COORD2F, MultiTexCoord2f, rc);
        }
        else
        {
            break;
        }

        if(RT_FAILURE(rc))
            break;

        GLint maxCoords, maxUnits;
        glGetIntegerv(GL_MAX_TEXTURE_COORDS, &maxCoords);
        glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &maxUnits);

        VBOXQGLLOGREL(("Max Tex Coords (%d), Img Units (%d)\n", maxCoords, maxUnits));
        /* take the minimum of those */
        if(maxUnits < maxCoords)
            maxCoords = maxUnits;
        if(maxUnits < 2)
        {
            VBOXQGLLOGREL(("Max Tex Coord or Img Units < 2 disabling MultiTex support\n"));
            break;
        }

        mMultiTexNumSupported = maxUnits;
    }while(0);


    do
    {
        rc = 0;
        mPBOSupported = false;

        if(m_GL_ARB_pixel_buffer_object)
        {
            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_GEN_BUFFERS, GenBuffers, rc);
            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_DELETE_BUFFERS, DeleteBuffers, rc);
            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_BIND_BUFFER, BindBuffer, rc);
            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_BUFFER_DATA, BufferData, rc);
            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_MAP_BUFFER, MapBuffer, rc);
            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_UNMAP_BUFFER, UnmapBuffer, rc);
        }
        else
        {
            break;
        }

        if(RT_FAILURE(rc))
            break;

        mPBOSupported = true;
    } while(0);

    do
    {
        rc = 0;
        mFragmentShaderSupported = false;

        if(mGLVersion >= 0x020000)  /* if ogl >= 2.0*/
        {
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_CREATE_SHADER, CreateShader, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_SHADER_SOURCE, ShaderSource, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_COMPILE_SHADER, CompileShader, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_DELETE_SHADER, DeleteShader, rc);

            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_CREATE_PROGRAM, CreateProgram, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_ATTACH_SHADER, AttachShader, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_DETACH_SHADER, DetachShader, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_LINK_PROGRAM, LinkProgram, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_USE_PROGRAM, UseProgram, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_DELETE_PROGRAM, DeleteProgram, rc);

            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_IS_SHADER, IsShader, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_GET_SHADERIV, GetShaderiv, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_IS_PROGRAM, IsProgram, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_GET_PROGRAMIV, GetProgramiv, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_GET_ATTACHED_SHADERS, GetAttachedShaders,  rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_GET_SHADER_INFO_LOG, GetShaderInfoLog, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_GET_PROGRAM_INFO_LOG, GetProgramInfoLog, rc);

            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_GET_UNIFORM_LOCATION, GetUniformLocation, rc);

            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_UNIFORM1F, Uniform1f, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_UNIFORM2F, Uniform2f, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_UNIFORM3F, Uniform3f, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_UNIFORM4F, Uniform4f, rc);

            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_UNIFORM1I, Uniform1i, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_UNIFORM2I, Uniform2i, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_UNIFORM3I, Uniform3i, rc);
            VBOXVHWA_PFNINIT_SAME(context, PFNVBOXVHWA_UNIFORM4I, Uniform4i, rc);
        }
        else if(m_GL_ARB_shader_objects && m_GL_ARB_fragment_shader)
        {
            VBOXVHWA_PFNINIT_OBJECT_ARB(context, PFNVBOXVHWA_CREATE_SHADER, CreateShader, rc);
            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_SHADER_SOURCE, ShaderSource, rc);
            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_COMPILE_SHADER, CompileShader, rc);
            VBOXVHWA_PFNINIT(context, PFNVBOXVHWA_DELETE_SHADER, DeleteShader, DeleteObjectARB, rc);

            VBOXVHWA_PFNINIT_OBJECT_ARB(context, PFNVBOXVHWA_CREATE_PROGRAM, CreateProgram, rc);
            VBOXVHWA_PFNINIT(context, PFNVBOXVHWA_ATTACH_SHADER, AttachShader, AttachObjectARB, rc);
            VBOXVHWA_PFNINIT(context, PFNVBOXVHWA_DETACH_SHADER, DetachShader, DetachObjectARB, rc);
            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_LINK_PROGRAM, LinkProgram, rc);
            VBOXVHWA_PFNINIT_OBJECT_ARB(context, PFNVBOXVHWA_USE_PROGRAM, UseProgram, rc);
            VBOXVHWA_PFNINIT(context, PFNVBOXVHWA_DELETE_PROGRAM, DeleteProgram, DeleteObjectARB, rc);

        //TODO:    VBOXVHWA_PFNINIT(PFNVBOXVHWA_IS_SHADER, IsShader, rc);
            VBOXVHWA_PFNINIT(context, PFNVBOXVHWA_GET_SHADERIV, GetShaderiv, GetObjectParameterivARB, rc);
        //TODO:    VBOXVHWA_PFNINIT(PFNVBOXVHWA_IS_PROGRAM, IsProgram, rc);
            VBOXVHWA_PFNINIT(context, PFNVBOXVHWA_GET_PROGRAMIV, GetProgramiv, GetObjectParameterivARB, rc);
            VBOXVHWA_PFNINIT(context, PFNVBOXVHWA_GET_ATTACHED_SHADERS, GetAttachedShaders, GetAttachedObjectsARB, rc);
            VBOXVHWA_PFNINIT(context, PFNVBOXVHWA_GET_SHADER_INFO_LOG, GetShaderInfoLog, GetInfoLogARB, rc);
            VBOXVHWA_PFNINIT(context, PFNVBOXVHWA_GET_PROGRAM_INFO_LOG, GetProgramInfoLog, GetInfoLogARB, rc);

            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_GET_UNIFORM_LOCATION, GetUniformLocation, rc);

            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_UNIFORM1F, Uniform1f, rc);
            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_UNIFORM2F, Uniform2f, rc);
            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_UNIFORM3F, Uniform3f, rc);
            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_UNIFORM4F, Uniform4f, rc);

            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_UNIFORM1I, Uniform1i, rc);
            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_UNIFORM2I, Uniform2i, rc);
            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_UNIFORM3I, Uniform3i, rc);
            VBOXVHWA_PFNINIT_ARB(context, PFNVBOXVHWA_UNIFORM4I, Uniform4i, rc);
        }
        else
        {
            break;
        }

        if(RT_FAILURE(rc))
            break;

        mFragmentShaderSupported = true;
    } while(0);

    do
    {
        rc = 0;
        mFBOSupported = false;

        if(m_GL_EXT_framebuffer_object)
        {
            VBOXVHWA_PFNINIT_EXT(context, PFNVBOXVHWA_IS_FRAMEBUFFER, IsFramebuffer, rc);
            VBOXVHWA_PFNINIT_EXT(context, PFNVBOXVHWA_BIND_FRAMEBUFFER, BindFramebuffer, rc);
            VBOXVHWA_PFNINIT_EXT(context, PFNVBOXVHWA_DELETE_FRAMEBUFFERS, DeleteFramebuffers, rc);
            VBOXVHWA_PFNINIT_EXT(context, PFNVBOXVHWA_GEN_FRAMEBUFFERS, GenFramebuffers, rc);
            VBOXVHWA_PFNINIT_EXT(context, PFNVBOXVHWA_CHECK_FRAMEBUFFER_STATUS, CheckFramebufferStatus, rc);
            VBOXVHWA_PFNINIT_EXT(context, PFNVBOXVHWA_FRAMEBUFFER_TEXTURE1D, FramebufferTexture1D, rc);
            VBOXVHWA_PFNINIT_EXT(context, PFNVBOXVHWA_FRAMEBUFFER_TEXTURE2D, FramebufferTexture2D, rc);
            VBOXVHWA_PFNINIT_EXT(context, PFNVBOXVHWA_FRAMEBUFFER_TEXTURE3D, FramebufferTexture3D, rc);
            VBOXVHWA_PFNINIT_EXT(context, PFNVBOXVHWA_GET_FRAMEBUFFER_ATTACHMENT_PARAMETRIV, GetFramebufferAttachmentParameteriv, rc);
        }
        else
        {
            break;
        }

        if(RT_FAILURE(rc))
            break;

        mFBOSupported = true;
    } while(0);

    if(m_GL_ARB_texture_rectangle || m_GL_EXT_texture_rectangle || m_GL_NV_texture_rectangle)
    {
        mTextureRectangleSupported = true;
    }
    else
    {
        mTextureRectangleSupported = false;
    }

    mTextureNP2Supported = m_GL_ARB_texture_non_power_of_two;
}

void VBoxVHWAInfo::init(const QGLContext * pContext)
{
    if(mInitialized)
        return;

    mInitialized = true;

    mglInfo.init(pContext);

    if(mglInfo.isFragmentShaderSupported() && mglInfo.isTextureRectangleSupported())
    {
        uint32_t num = 0;
        mFourccSupportedList[num++] = FOURCC_AYUV;
        mFourccSupportedList[num++] = FOURCC_UYVY;
        mFourccSupportedList[num++] = FOURCC_YUY2;
        if(mglInfo.getMultiTexNumSupported() >= 4)
        {
            /* YV12 currently requires 3 units (for each color component)
             * + 1 unit for dst texture for color-keying + 3 units for each color component
             * TODO: we could store YV12 data in one texture to eliminate this requirement*/
            mFourccSupportedList[num++] = FOURCC_YV12;
        }

        Assert(num <= VBOXVHWA_NUMFOURCC);
        mFourccSupportedCount = num;
    }
    else
    {
        mFourccSupportedCount = 0;
    }
}

bool VBoxVHWAInfo::isVHWASupported() const
{
    if(mglInfo.getGLVersion() <= 0)
    {
        /* error occurred while gl info initialization */
        VBOXQGLLOGREL(("2D not supported: gl version info not initialized properly\n"));
        return false;
    }

#ifndef DEBUGVHWASTRICT
    /* in case we do not support shaders & multitexturing we can not supprt dst colorkey,
     * no sense to report Video Acceleration supported */
    if(!mglInfo.isFragmentShaderSupported())
    {
        VBOXQGLLOGREL(("2D not supported: fragment shader unsupported\n"));
        return false;
    }
#endif
    if(mglInfo.getMultiTexNumSupported() < 2)
    {
        VBOXQGLLOGREL(("2D not supported: multitexture unsupported\n"));
        return false;
    }

    /* color conversion now supported only GL_TEXTURE_RECTANGLE
     * in this case only stretching is accelerated
     * report as unsupported, TODO: probably should report as supported for stretch acceleration */
    if(!mglInfo.isTextureRectangleSupported())
    {
        VBOXQGLLOGREL(("2D not supported: texture rectangle unsupported\n"));
        return false;
    }

    VBOXQGLLOGREL(("2D is supported!\n"));
    return true;
}

/* static */
bool VBoxVHWAInfo::checkVHWASupport()
{
#if defined(RT_OS_WINDOWS) || defined(RT_OS_LINUX)
    static char pszVBoxPath[RTPATH_MAX];
    const char *papszArgs[] = { NULL, "-test", "2D", NULL};
    int rc;
    RTPROCESS Process;
    RTPROCSTATUS ProcStatus;
    uint64_t StartTS;

    rc = RTPathExecDir(pszVBoxPath, RTPATH_MAX); AssertRCReturn(rc, false);
#if defined(RT_OS_WINDOWS) || defined(RT_OS_OS2)
    rc = RTPathAppend(pszVBoxPath, RTPATH_MAX, "VBoxTestOGL.exe");
#else
    rc = RTPathAppend(pszVBoxPath, RTPATH_MAX, "VBoxTestOGL");
#endif
    papszArgs[0] = pszVBoxPath;         /* argv[0] */
    AssertRCReturn(rc, false);

    rc = RTProcCreate(pszVBoxPath, papszArgs, RTENV_DEFAULT, 0, &Process);
    if (RT_FAILURE(rc))
    {
        VBOXQGLLOGREL(("2D support test failed: failed to create a test process\n"));
        return false;
    }

    StartTS = RTTimeMilliTS();

    while (1)
    {
        rc = RTProcWait(Process, RTPROCWAIT_FLAGS_NOBLOCK, &ProcStatus);
        if (rc != VERR_PROCESS_RUNNING)
            break;

        if (RTTimeMilliTS() - StartTS > 30*1000 /* 30 sec */)
        {
            RTProcTerminate(Process);
            RTThreadSleep(100);
            RTProcWait(Process, RTPROCWAIT_FLAGS_NOBLOCK, &ProcStatus);
            VBOXQGLLOGREL(("2D support test failed: the test did not complete within 30 sec\n"));
            return false;
        }
        RTThreadSleep(100);
    }

    if (RT_SUCCESS(rc))
    {
        if ((ProcStatus.enmReason==RTPROCEXITREASON_NORMAL) && (ProcStatus.iStatus==0))
        {
            VBOXQGLLOGREL(("2D support test succeeded\n"));
            return true;
        }
    }

    VBOXQGLLOGREL(("2D support test failed: err code (%Rra)\n", rc));

    return false;
#else
    /* @todo: test & enable external app approach*/
    VBoxGLTmpContext ctx;
    const QGLContext *pContext = ctx.makeCurrent();
    Assert(pContext);
    if(pContext)
    {
        VBoxVHWAInfo info;
        info.init(pContext);
        return info.isVHWASupported();
    }
    return false;
#endif
}

VBoxGLTmpContext::VBoxGLTmpContext()
{
    if(QGLFormat::hasOpenGL())
    {
        mWidget = new QGLWidget();
    }
    else
    {
        mWidget = NULL;
    }
}

VBoxGLTmpContext::~VBoxGLTmpContext()
{
    if(mWidget)
        delete mWidget;
}

const class QGLContext * VBoxGLTmpContext::makeCurrent()
{
    if(mWidget)
    {
        mWidget->makeCurrent();
        return mWidget->context();
    }
    return NULL;
}