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comparison: gfx/skia/trunk/src/gpu/gl/GrGLCaps.cpp

gfx/skia/trunk/src/gpu/gl/GrGLCaps.cpp

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1 /*
2 * Copyright 2012 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8
9 #include "GrGLCaps.h"
10 #include "GrGLContext.h"
11 #include "SkTSearch.h"
12 #include "SkTSort.h"
13
14 GrGLCaps::GrGLCaps() {
15 this->reset();
16 }
17
18 void GrGLCaps::reset() {
19 INHERITED::reset();
20
21 fVerifiedColorConfigs.reset();
22 fStencilFormats.reset();
23 fStencilVerifiedColorConfigs.reset();
24 fMSFBOType = kNone_MSFBOType;
25 fFBFetchType = kNone_FBFetchType;
26 fMaxFragmentUniformVectors = 0;
27 fMaxVertexAttributes = 0;
28 fMaxFragmentTextureUnits = 0;
29 fMaxFixedFunctionTextureCoords = 0;
30 fRGBA8RenderbufferSupport = false;
31 fBGRAFormatSupport = false;
32 fBGRAIsInternalFormat = false;
33 fTextureSwizzleSupport = false;
34 fUnpackRowLengthSupport = false;
35 fUnpackFlipYSupport = false;
36 fPackRowLengthSupport = false;
37 fPackFlipYSupport = false;
38 fTextureUsageSupport = false;
39 fTexStorageSupport = false;
40 fTextureRedSupport = false;
41 fImagingSupport = false;
42 fTwoFormatLimit = false;
43 fFragCoordsConventionSupport = false;
44 fVertexArrayObjectSupport = false;
45 fUseNonVBOVertexAndIndexDynamicData = false;
46 fIsCoreProfile = false;
47 fFixedFunctionSupport = false;
48 fDiscardFBSupport = false;
49 fFullClearIsFree = false;
50 }
51
52 GrGLCaps::GrGLCaps(const GrGLCaps& caps) : GrDrawTargetCaps() {
53 *this = caps;
54 }
55
56 GrGLCaps& GrGLCaps::operator = (const GrGLCaps& caps) {
57 INHERITED::operator=(caps);
58 fVerifiedColorConfigs = caps.fVerifiedColorConfigs;
59 fStencilFormats = caps.fStencilFormats;
60 fStencilVerifiedColorConfigs = caps.fStencilVerifiedColorConfigs;
61 fMaxFragmentUniformVectors = caps.fMaxFragmentUniformVectors;
62 fMaxVertexAttributes = caps.fMaxVertexAttributes;
63 fMaxFragmentTextureUnits = caps.fMaxFragmentTextureUnits;
64 fMaxFixedFunctionTextureCoords = caps.fMaxFixedFunctionTextureCoords;
65 fMSFBOType = caps.fMSFBOType;
66 fFBFetchType = caps.fFBFetchType;
67 fRGBA8RenderbufferSupport = caps.fRGBA8RenderbufferSupport;
68 fBGRAFormatSupport = caps.fBGRAFormatSupport;
69 fBGRAIsInternalFormat = caps.fBGRAIsInternalFormat;
70 fTextureSwizzleSupport = caps.fTextureSwizzleSupport;
71 fUnpackRowLengthSupport = caps.fUnpackRowLengthSupport;
72 fUnpackFlipYSupport = caps.fUnpackFlipYSupport;
73 fPackRowLengthSupport = caps.fPackRowLengthSupport;
74 fPackFlipYSupport = caps.fPackFlipYSupport;
75 fTextureUsageSupport = caps.fTextureUsageSupport;
76 fTexStorageSupport = caps.fTexStorageSupport;
77 fTextureRedSupport = caps.fTextureRedSupport;
78 fImagingSupport = caps.fImagingSupport;
79 fTwoFormatLimit = caps.fTwoFormatLimit;
80 fFragCoordsConventionSupport = caps.fFragCoordsConventionSupport;
81 fVertexArrayObjectSupport = caps.fVertexArrayObjectSupport;
82 fUseNonVBOVertexAndIndexDynamicData = caps.fUseNonVBOVertexAndIndexDynamicData;
83 fIsCoreProfile = caps.fIsCoreProfile;
84 fFixedFunctionSupport = caps.fFixedFunctionSupport;
85 fDiscardFBSupport = caps.fDiscardFBSupport;
86 fFullClearIsFree = caps.fFullClearIsFree;
87
88 return *this;
89 }
90
91 void GrGLCaps::init(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
92
93 this->reset();
94 if (!ctxInfo.isInitialized()) {
95 return;
96 }
97
98 GrGLStandard standard = ctxInfo.standard();
99 GrGLVersion version = ctxInfo.version();
100
101 /**************************************************************************
102 * Caps specific to GrGLCaps
103 **************************************************************************/
104
105 if (kGLES_GrGLStandard == standard) {
106 GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_VECTORS,
107 &fMaxFragmentUniformVectors);
108 } else {
109 SkASSERT(kGL_GrGLStandard == standard);
110 GrGLint max;
111 GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, &max);
112 fMaxFragmentUniformVectors = max / 4;
113 if (version >= GR_GL_VER(3, 2)) {
114 GrGLint profileMask;
115 GR_GL_GetIntegerv(gli, GR_GL_CONTEXT_PROFILE_MASK, &profileMask);
116 fIsCoreProfile = SkToBool(profileMask & GR_GL_CONTEXT_CORE_PROFILE_BIT);
117 }
118 if (!fIsCoreProfile) {
119 fFixedFunctionSupport = true;
120 GR_GL_GetIntegerv(gli, GR_GL_MAX_TEXTURE_COORDS, &fMaxFixedFunctionTextureCoords);
121 // Sanity check
122 SkASSERT(fMaxFixedFunctionTextureCoords > 0 && fMaxFixedFunctionTextureCoords < 128);
123 }
124 }
125 GR_GL_GetIntegerv(gli, GR_GL_MAX_VERTEX_ATTRIBS, &fMaxVertexAttributes);
126 GR_GL_GetIntegerv(gli, GR_GL_MAX_TEXTURE_IMAGE_UNITS, &fMaxFragmentTextureUnits);
127
128 if (kGL_GrGLStandard == standard) {
129 fRGBA8RenderbufferSupport = true;
130 } else {
131 fRGBA8RenderbufferSupport = version >= GR_GL_VER(3,0) ||
132 ctxInfo.hasExtension("GL_OES_rgb8_rgba8") ||
133 ctxInfo.hasExtension("GL_ARM_rgba8");
134 }
135
136 if (kGL_GrGLStandard == standard) {
137 fBGRAFormatSupport = version >= GR_GL_VER(1,2) ||
138 ctxInfo.hasExtension("GL_EXT_bgra");
139 } else {
140 if (ctxInfo.hasExtension("GL_APPLE_texture_format_BGRA8888")) {
141 fBGRAFormatSupport = true;
142 } else if (ctxInfo.hasExtension("GL_EXT_texture_format_BGRA8888")) {
143 fBGRAFormatSupport = true;
144 fBGRAIsInternalFormat = true;
145 }
146 SkASSERT(fBGRAFormatSupport ||
147 kSkia8888_GrPixelConfig != kBGRA_8888_GrPixelConfig);
148 }
149
150 if (kGL_GrGLStandard == standard) {
151 fTextureSwizzleSupport = version >= GR_GL_VER(3,3) ||
152 ctxInfo.hasExtension("GL_ARB_texture_swizzle");
153 } else {
154 fTextureSwizzleSupport = version >= GR_GL_VER(3,0);
155 }
156
157 if (kGL_GrGLStandard == standard) {
158 fUnpackRowLengthSupport = true;
159 fUnpackFlipYSupport = false;
160 fPackRowLengthSupport = true;
161 fPackFlipYSupport = false;
162 } else {
163 fUnpackRowLengthSupport = version >= GR_GL_VER(3,0) ||
164 ctxInfo.hasExtension("GL_EXT_unpack_subimage");
165 fUnpackFlipYSupport = ctxInfo.hasExtension("GL_CHROMIUM_flipy");
166 fPackRowLengthSupport = version >= GR_GL_VER(3,0) ||
167 ctxInfo.hasExtension("GL_NV_pack_subimage");
168 fPackFlipYSupport =
169 ctxInfo.hasExtension("GL_ANGLE_pack_reverse_row_order");
170 }
171
172 fTextureUsageSupport = (kGLES_GrGLStandard == standard) &&
173 ctxInfo.hasExtension("GL_ANGLE_texture_usage");
174
175 if (kGL_GrGLStandard == standard) {
176 // The EXT version can apply to either GL or GLES.
177 fTexStorageSupport = version >= GR_GL_VER(4,2) ||
178 ctxInfo.hasExtension("GL_ARB_texture_storage") ||
179 ctxInfo.hasExtension("GL_EXT_texture_storage");
180 } else {
181 // Qualcomm Adreno drivers appear to have issues with texture storage.
182 fTexStorageSupport = (version >= GR_GL_VER(3,0) &&
183 kQualcomm_GrGLVendor != ctxInfo.vendor()) ||
184 ctxInfo.hasExtension("GL_EXT_texture_storage");
185 }
186
187 // ARB_texture_rg is part of OpenGL 3.0, but mesa doesn't support it if
188 // it doesn't have ARB_texture_rg extension.
189 if (kGL_GrGLStandard == standard) {
190 if (ctxInfo.isMesa()) {
191 fTextureRedSupport = ctxInfo.hasExtension("GL_ARB_texture_rg");
192 } else {
193 fTextureRedSupport = version >= GR_GL_VER(3,0) ||
194 ctxInfo.hasExtension("GL_ARB_texture_rg");
195 }
196 } else {
197 fTextureRedSupport = version >= GR_GL_VER(3,0) ||
198 ctxInfo.hasExtension("GL_EXT_texture_rg");
199 }
200
201 fImagingSupport = kGL_GrGLStandard == standard &&
202 ctxInfo.hasExtension("GL_ARB_imaging");
203
204 // ES 2 only guarantees RGBA/uchar + one other format/type combo for
205 // ReadPixels. The other format has to checked at run-time since it
206 // can change based on which render target is bound
207 fTwoFormatLimit = kGLES_GrGLStandard == standard;
208
209 // Known issue on at least some Intel platforms:
210 // http://code.google.com/p/skia/issues/detail?id=946
211 if (kIntel_GrGLVendor != ctxInfo.vendor()) {
212 fFragCoordsConventionSupport = ctxInfo.glslGeneration() >= k150_GrGLSLGeneration ||
213 ctxInfo.hasExtension("GL_ARB_fragment_coord_conventions");
214 }
215
216 // SGX and Mali GPUs that are based on a tiled-deferred architecture that have trouble with
217 // frequently changing VBOs. We've measured a performance increase using non-VBO vertex
218 // data for dynamic content on these GPUs. Perhaps we should read the renderer string and
219 // limit this decision to specific GPU families rather than basing it on the vendor alone.
220 if (!GR_GL_MUST_USE_VBO &&
221 (kARM_GrGLVendor == ctxInfo.vendor() || kImagination_GrGLVendor == ctxInfo.vendor())) {
222 fUseNonVBOVertexAndIndexDynamicData = true;
223 }
224
225 fDiscardFBSupport = ctxInfo.hasExtension("GL_EXT_discard_framebuffer");
226
227 if (kARM_GrGLVendor == ctxInfo.vendor() || kImagination_GrGLVendor == ctxInfo.vendor()) {
228 fFullClearIsFree = true;
229 }
230
231 if (kGL_GrGLStandard == standard) {
232 fVertexArrayObjectSupport = version >= GR_GL_VER(3, 0) ||
233 ctxInfo.hasExtension("GL_ARB_vertex_array_object");
234 } else {
235 fVertexArrayObjectSupport = version >= GR_GL_VER(3, 0) ||
236 ctxInfo.hasExtension("GL_OES_vertex_array_object");
237 }
238
239 if (kGLES_GrGLStandard == standard) {
240 if (ctxInfo.hasExtension("GL_EXT_shader_framebuffer_fetch")) {
241 fFBFetchType = kEXT_FBFetchType;
242 } else if (ctxInfo.hasExtension("GL_NV_shader_framebuffer_fetch")) {
243 fFBFetchType = kNV_FBFetchType;
244 }
245 }
246
247 this->initFSAASupport(ctxInfo, gli);
248 this->initStencilFormats(ctxInfo);
249
250 /**************************************************************************
251 * GrDrawTargetCaps fields
252 **************************************************************************/
253 GrGLint numFormats;
254 GR_GL_GetIntegerv(gli, GR_GL_NUM_COMPRESSED_TEXTURE_FORMATS, &numFormats);
255 if (numFormats) {
256 SkAutoSTMalloc<10, GrGLint> formats(numFormats);
257 GR_GL_GetIntegerv(gli, GR_GL_COMPRESSED_TEXTURE_FORMATS, formats);
258 for (int i = 0; i < numFormats; ++i) {
259 if (formats[i] == GR_GL_PALETTE8_RGBA8) {
260 f8BitPaletteSupport = true;
261 break;
262 }
263 }
264 }
265
266 if (kGL_GrGLStandard == standard) {
267 // we could also look for GL_ATI_separate_stencil extension or
268 // GL_EXT_stencil_two_side but they use different function signatures
269 // than GL2.0+ (and than each other).
270 fTwoSidedStencilSupport = (ctxInfo.version() >= GR_GL_VER(2,0));
271 // supported on GL 1.4 and higher or by extension
272 fStencilWrapOpsSupport = (ctxInfo.version() >= GR_GL_VER(1,4)) ||
273 ctxInfo.hasExtension("GL_EXT_stencil_wrap");
274 } else {
275 // ES 2 has two sided stencil and stencil wrap
276 fTwoSidedStencilSupport = true;
277 fStencilWrapOpsSupport = true;
278 }
279
280 if (kGL_GrGLStandard == standard) {
281 fBufferLockSupport = true; // we require VBO support and the desktop VBO extension includes
282 // glMapBuffer.
283 } else {
284 fBufferLockSupport = ctxInfo.hasExtension("GL_OES_mapbuffer");
285 }
286
287 if (kGL_GrGLStandard == standard) {
288 SkASSERT(ctxInfo.version() >= GR_GL_VER(2,0) ||
289 ctxInfo.hasExtension("GL_ARB_texture_non_power_of_two"));
290 fNPOTTextureTileSupport = true;
291 fMipMapSupport = true;
292 } else {
293 // Unextended ES2 supports NPOT textures with clamp_to_edge and non-mip filters only
294 // ES3 has no limitations.
295 fNPOTTextureTileSupport = ctxInfo.version() >= GR_GL_VER(3,0) ||
296 ctxInfo.hasExtension("GL_OES_texture_npot");
297 // ES2 supports MIP mapping for POT textures but our caps don't allow for limited MIP
298 // support. The OES extension or ES 3.0 allow for MIPS on NPOT textures. So, apparently,
299 // does the undocumented GL_IMG_texture_npot extension. This extension does not seem to
300 // to alllow arbitrary wrap modes, however.
301 fMipMapSupport = fNPOTTextureTileSupport || ctxInfo.hasExtension("GL_IMG_texture_npot");
302 }
303
304 fHWAALineSupport = (kGL_GrGLStandard == standard);
305
306 GR_GL_GetIntegerv(gli, GR_GL_MAX_TEXTURE_SIZE, &fMaxTextureSize);
307 GR_GL_GetIntegerv(gli, GR_GL_MAX_RENDERBUFFER_SIZE, &fMaxRenderTargetSize);
308 // Our render targets are always created with textures as the color
309 // attachment, hence this min:
310 fMaxRenderTargetSize = GrMin(fMaxTextureSize, fMaxRenderTargetSize);
311
312 fPathRenderingSupport = ctxInfo.hasExtension("GL_NV_path_rendering");
313 SkASSERT(!fPathRenderingSupport || fFixedFunctionSupport);
314
315 fGpuTracingSupport = ctxInfo.hasExtension("GL_EXT_debug_marker");
316
317 fDstReadInShaderSupport = kNone_FBFetchType != fFBFetchType;
318
319 // Disable scratch texture reuse on Mali and Adreno devices
320 fReuseScratchTextures = kARM_GrGLVendor != ctxInfo.vendor() &&
321 kQualcomm_GrGLVendor != ctxInfo.vendor();
322
323 // Enable supported shader-related caps
324 if (kGL_GrGLStandard == standard) {
325 fDualSourceBlendingSupport = ctxInfo.version() >= GR_GL_VER(3,3) ||
326 ctxInfo.hasExtension("GL_ARB_blend_func_extended");
327 fShaderDerivativeSupport = true;
328 // we don't support GL_ARB_geometry_shader4, just GL 3.2+ GS
329 fGeometryShaderSupport = ctxInfo.version() >= GR_GL_VER(3,2) &&
330 ctxInfo.glslGeneration() >= k150_GrGLSLGeneration;
331 } else {
332 fShaderDerivativeSupport = ctxInfo.hasExtension("GL_OES_standard_derivatives");
333 }
334
335 if (GrGLCaps::kES_IMG_MsToTexture_MSFBOType == fMSFBOType) {
336 GR_GL_GetIntegerv(gli, GR_GL_MAX_SAMPLES_IMG, &fMaxSampleCount);
337 } else if (GrGLCaps::kNone_MSFBOType != fMSFBOType) {
338 GR_GL_GetIntegerv(gli, GR_GL_MAX_SAMPLES, &fMaxSampleCount);
339 }
340
341 this->initConfigRenderableTable(ctxInfo);
342 }
343
344 void GrGLCaps::initConfigRenderableTable(const GrGLContextInfo& ctxInfo) {
345
346 // OpenGL < 3.0
347 // no support for render targets unless the GL_ARB_framebuffer_object
348 // extension is supported (in which case we get ALPHA, RED, RG, RGB,
349 // RGBA (ALPHA8, RGBA4, RGBA8) for OpenGL > 1.1). Note that we
350 // probably don't get R8 in this case.
351
352 // OpenGL 3.0
353 // base color renderable: ALPHA, RED, RG, RGB, and RGBA
354 // sized derivatives: ALPHA8, R8, RGBA4, RGBA8
355
356 // >= OpenGL 3.1
357 // base color renderable: RED, RG, RGB, and RGBA
358 // sized derivatives: R8, RGBA4, RGBA8
359 // if the GL_ARB_compatibility extension is supported then we get back
360 // support for GL_ALPHA and ALPHA8
361
362 // GL_EXT_bgra adds BGRA render targets to any version
363
364 // ES 2.0
365 // color renderable: RGBA4, RGB5_A1, RGB565
366 // GL_EXT_texture_rg adds support for R8 as a color render target
367 // GL_OES_rgb8_rgba8 and/or GL_ARM_rgba8 adds support for RGBA8
368 // GL_EXT_texture_format_BGRA8888 and/or GL_APPLE_texture_format_BGRA8888 added BGRA support
369
370 // ES 3.0
371 // Same as ES 2.0 except R8 and RGBA8 are supported without extensions (the functions called
372 // below already account for this).
373
374 enum {
375 kNo_MSAA = 0,
376 kYes_MSAA = 1,
377 };
378
379 if (kGL_GrGLStandard == ctxInfo.standard()) {
380 // Post 3.0 we will get R8
381 // Prior to 3.0 we will get ALPHA8 (with GL_ARB_framebuffer_object)
382 if (ctxInfo.version() >= GR_GL_VER(3,0) ||
383 ctxInfo.hasExtension("GL_ARB_framebuffer_object")) {
384 fConfigRenderSupport[kAlpha_8_GrPixelConfig][kNo_MSAA] = true;
385 fConfigRenderSupport[kAlpha_8_GrPixelConfig][kYes_MSAA] = true;
386 }
387 } else {
388 // On ES we can only hope for R8
389 fConfigRenderSupport[kAlpha_8_GrPixelConfig][kNo_MSAA] = fTextureRedSupport;
390 fConfigRenderSupport[kAlpha_8_GrPixelConfig][kYes_MSAA] = fTextureRedSupport;
391 }
392
393 if (kGL_GrGLStandard != ctxInfo.standard()) {
394 // only available in ES
395 fConfigRenderSupport[kRGB_565_GrPixelConfig][kNo_MSAA] = true;
396 fConfigRenderSupport[kRGB_565_GrPixelConfig][kYes_MSAA] = true;
397 }
398
399 // we no longer support 444 as a render target
400 fConfigRenderSupport[kRGBA_4444_GrPixelConfig][kNo_MSAA] = false;
401 fConfigRenderSupport[kRGBA_4444_GrPixelConfig][kYes_MSAA] = false;
402
403 if (this->fRGBA8RenderbufferSupport) {
404 fConfigRenderSupport[kRGBA_8888_GrPixelConfig][kNo_MSAA] = true;
405 fConfigRenderSupport[kRGBA_8888_GrPixelConfig][kYes_MSAA] = true;
406 }
407
408 if (this->fBGRAFormatSupport) {
409 fConfigRenderSupport[kBGRA_8888_GrPixelConfig][kNo_MSAA] = true;
410 // The GL_EXT_texture_format_BGRA8888 extension does not add BGRA to the list of
411 // configs that are color-renderable and can be passed to glRenderBufferStorageMultisample.
412 // Chromium may have an extension to allow BGRA renderbuffers to work on desktop platforms.
413 if (ctxInfo.hasExtension("GL_CHROMIUM_renderbuffer_format_BGRA8888")) {
414 fConfigRenderSupport[kBGRA_8888_GrPixelConfig][kYes_MSAA] = true;
415 } else {
416 fConfigRenderSupport[kBGRA_8888_GrPixelConfig][kYes_MSAA] =
417 !fBGRAIsInternalFormat || !this->usesMSAARenderBuffers();
418 }
419 }
420
421 // If we don't support MSAA then undo any places above where we set a config as renderable with
422 // msaa.
423 if (kNone_MSFBOType == fMSFBOType) {
424 for (int i = 0; i < kGrPixelConfigCnt; ++i) {
425 fConfigRenderSupport[i][kYes_MSAA] = false;
426 }
427 }
428 }
429
430 bool GrGLCaps::readPixelsSupported(const GrGLInterface* intf,
431 GrGLenum format,
432 GrGLenum type) const {
433 if (GR_GL_RGBA == format && GR_GL_UNSIGNED_BYTE == type) {
434 // ES 2 guarantees this format is supported
435 return true;
436 }
437
438 if (!fTwoFormatLimit) {
439 // not limited by ES 2's constraints
440 return true;
441 }
442
443 GrGLint otherFormat = GR_GL_RGBA;
444 GrGLint otherType = GR_GL_UNSIGNED_BYTE;
445
446 // The other supported format/type combo supported for ReadPixels
447 // can change based on which render target is bound
448 GR_GL_GetIntegerv(intf,
449 GR_GL_IMPLEMENTATION_COLOR_READ_FORMAT,
450 &otherFormat);
451
452 GR_GL_GetIntegerv(intf,
453 GR_GL_IMPLEMENTATION_COLOR_READ_TYPE,
454 &otherType);
455
456 return (GrGLenum)otherFormat == format && (GrGLenum)otherType == type;
457 }
458
459 void GrGLCaps::initFSAASupport(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
460
461 fMSFBOType = kNone_MSFBOType;
462 if (kGL_GrGLStandard != ctxInfo.standard()) {
463 // We prefer the EXT/IMG extension over ES3 MSAA because we've observed
464 // ES3 driver bugs on at least one device with a tiled GPU (N10).
465 if (ctxInfo.hasExtension("GL_EXT_multisampled_render_to_texture")) {
466 fMSFBOType = kES_EXT_MsToTexture_MSFBOType;
467 } else if (ctxInfo.hasExtension("GL_IMG_multisampled_render_to_texture")) {
468 fMSFBOType = kES_IMG_MsToTexture_MSFBOType;
469 } else if (ctxInfo.version() >= GR_GL_VER(3,0)) {
470 fMSFBOType = GrGLCaps::kES_3_0_MSFBOType;
471 } else if (ctxInfo.hasExtension("GL_CHROMIUM_framebuffer_multisample")) {
472 // chrome's extension is equivalent to the EXT msaa
473 // and fbo_blit extensions.
474 fMSFBOType = kDesktop_EXT_MSFBOType;
475 } else if (ctxInfo.hasExtension("GL_APPLE_framebuffer_multisample")) {
476 fMSFBOType = kES_Apple_MSFBOType;
477 }
478 } else {
479 if ((ctxInfo.version() >= GR_GL_VER(3,0)) ||
480 ctxInfo.hasExtension("GL_ARB_framebuffer_object")) {
481 fMSFBOType = GrGLCaps::kDesktop_ARB_MSFBOType;
482 } else if (ctxInfo.hasExtension("GL_EXT_framebuffer_multisample") &&
483 ctxInfo.hasExtension("GL_EXT_framebuffer_blit")) {
484 fMSFBOType = GrGLCaps::kDesktop_EXT_MSFBOType;
485 }
486 }
487 }
488
489 namespace {
490 const GrGLuint kUnknownBitCount = GrGLStencilBuffer::kUnknownBitCount;
491 }
492
493 void GrGLCaps::initStencilFormats(const GrGLContextInfo& ctxInfo) {
494
495 // Build up list of legal stencil formats (though perhaps not supported on
496 // the particular gpu/driver) from most preferred to least.
497
498 // these consts are in order of most preferred to least preferred
499 // we don't bother with GL_STENCIL_INDEX1 or GL_DEPTH32F_STENCIL8
500
501 static const StencilFormat
502 // internal Format stencil bits total bits packed?
503 gS8 = {GR_GL_STENCIL_INDEX8, 8, 8, false},
504 gS16 = {GR_GL_STENCIL_INDEX16, 16, 16, false},
505 gD24S8 = {GR_GL_DEPTH24_STENCIL8, 8, 32, true },
506 gS4 = {GR_GL_STENCIL_INDEX4, 4, 4, false},
507 // gS = {GR_GL_STENCIL_INDEX, kUnknownBitCount, kUnknownBitCount, false},
508 gDS = {GR_GL_DEPTH_STENCIL, kUnknownBitCount, kUnknownBitCount, true };
509
510 if (kGL_GrGLStandard == ctxInfo.standard()) {
511 bool supportsPackedDS =
512 ctxInfo.version() >= GR_GL_VER(3,0) ||
513 ctxInfo.hasExtension("GL_EXT_packed_depth_stencil") ||
514 ctxInfo.hasExtension("GL_ARB_framebuffer_object");
515
516 // S1 thru S16 formats are in GL 3.0+, EXT_FBO, and ARB_FBO since we
517 // require FBO support we can expect these are legal formats and don't
518 // check. These also all support the unsized GL_STENCIL_INDEX.
519 fStencilFormats.push_back() = gS8;
520 fStencilFormats.push_back() = gS16;
521 if (supportsPackedDS) {
522 fStencilFormats.push_back() = gD24S8;
523 }
524 fStencilFormats.push_back() = gS4;
525 if (supportsPackedDS) {
526 fStencilFormats.push_back() = gDS;
527 }
528 } else {
529 // ES2 has STENCIL_INDEX8 without extensions but requires extensions
530 // for other formats.
531 // ES doesn't support using the unsized format.
532
533 fStencilFormats.push_back() = gS8;
534 //fStencilFormats.push_back() = gS16;
535 if (ctxInfo.version() >= GR_GL_VER(3,0) ||
536 ctxInfo.hasExtension("GL_OES_packed_depth_stencil")) {
537 fStencilFormats.push_back() = gD24S8;
538 }
539 if (ctxInfo.hasExtension("GL_OES_stencil4")) {
540 fStencilFormats.push_back() = gS4;
541 }
542 }
543 SkASSERT(0 == fStencilVerifiedColorConfigs.count());
544 fStencilVerifiedColorConfigs.push_back_n(fStencilFormats.count());
545 }
546
547 void GrGLCaps::markColorConfigAndStencilFormatAsVerified(
548 GrPixelConfig config,
549 const GrGLStencilBuffer::Format& format) {
550 #if !GR_GL_CHECK_FBO_STATUS_ONCE_PER_FORMAT
551 return;
552 #endif
553 SkASSERT((unsigned)config < (unsigned)kGrPixelConfigCnt);
554 SkASSERT(fStencilFormats.count() == fStencilVerifiedColorConfigs.count());
555 int count = fStencilFormats.count();
556 // we expect a really small number of possible formats so linear search
557 // should be OK
558 SkASSERT(count < 16);
559 for (int i = 0; i < count; ++i) {
560 if (format.fInternalFormat ==
561 fStencilFormats[i].fInternalFormat) {
562 fStencilVerifiedColorConfigs[i].markVerified(config);
563 return;
564 }
565 }
566 GrCrash("Why are we seeing a stencil format that "
567 "GrGLCaps doesn't know about.");
568 }
569
570 bool GrGLCaps::isColorConfigAndStencilFormatVerified(
571 GrPixelConfig config,
572 const GrGLStencilBuffer::Format& format) const {
573 #if !GR_GL_CHECK_FBO_STATUS_ONCE_PER_FORMAT
574 return false;
575 #endif
576 SkASSERT((unsigned)config < (unsigned)kGrPixelConfigCnt);
577 int count = fStencilFormats.count();
578 // we expect a really small number of possible formats so linear search
579 // should be OK
580 SkASSERT(count < 16);
581 for (int i = 0; i < count; ++i) {
582 if (format.fInternalFormat ==
583 fStencilFormats[i].fInternalFormat) {
584 return fStencilVerifiedColorConfigs[i].isVerified(config);
585 }
586 }
587 GrCrash("Why are we seeing a stencil format that "
588 "GLCaps doesn't know about.");
589 return false;
590 }
591
592 SkString GrGLCaps::dump() const {
593
594 SkString r = INHERITED::dump();
595
596 r.appendf("--- GL-Specific ---\n");
597 for (int i = 0; i < fStencilFormats.count(); ++i) {
598 r.appendf("Stencil Format %d, stencil bits: %02d, total bits: %02d\n",
599 i,
600 fStencilFormats[i].fStencilBits,
601 fStencilFormats[i].fTotalBits);
602 }
603
604 static const char* kMSFBOExtStr[] = {
605 "None",
606 "ARB",
607 "EXT",
608 "ES 3.0",
609 "Apple",
610 "IMG MS To Texture",
611 "EXT MS To Texture",
612 };
613 GR_STATIC_ASSERT(0 == kNone_MSFBOType);
614 GR_STATIC_ASSERT(1 == kDesktop_ARB_MSFBOType);
615 GR_STATIC_ASSERT(2 == kDesktop_EXT_MSFBOType);
616 GR_STATIC_ASSERT(3 == kES_3_0_MSFBOType);
617 GR_STATIC_ASSERT(4 == kES_Apple_MSFBOType);
618 GR_STATIC_ASSERT(5 == kES_IMG_MsToTexture_MSFBOType);
619 GR_STATIC_ASSERT(6 == kES_EXT_MsToTexture_MSFBOType);
620 GR_STATIC_ASSERT(GR_ARRAY_COUNT(kMSFBOExtStr) == kLast_MSFBOType + 1);
621
622 static const char* kFBFetchTypeStr[] = {
623 "None",
624 "EXT",
625 "NV",
626 };
627 GR_STATIC_ASSERT(0 == kNone_FBFetchType);
628 GR_STATIC_ASSERT(1 == kEXT_FBFetchType);
629 GR_STATIC_ASSERT(2 == kNV_FBFetchType);
630 GR_STATIC_ASSERT(GR_ARRAY_COUNT(kFBFetchTypeStr) == kLast_FBFetchType + 1);
631
632
633 r.appendf("Core Profile: %s\n", (fIsCoreProfile ? "YES" : "NO"));
634 r.appendf("Fixed Function Support: %s\n", (fFixedFunctionSupport ? "YES" : "NO"));
635 r.appendf("MSAA Type: %s\n", kMSFBOExtStr[fMSFBOType]);
636 r.appendf("FB Fetch Type: %s\n", kFBFetchTypeStr[fFBFetchType]);
637 r.appendf("Max FS Uniform Vectors: %d\n", fMaxFragmentUniformVectors);
638 r.appendf("Max FS Texture Units: %d\n", fMaxFragmentTextureUnits);
639 if (fFixedFunctionSupport) {
640 r.appendf("Max Fixed Function Texture Coords: %d\n", fMaxFixedFunctionTextureCoords);
641 }
642 r.appendf("Max Vertex Attributes: %d\n", fMaxVertexAttributes);
643 r.appendf("Support RGBA8 Render Buffer: %s\n", (fRGBA8RenderbufferSupport ? "YES": "NO"));
644 r.appendf("BGRA support: %s\n", (fBGRAFormatSupport ? "YES": "NO"));
645 r.appendf("BGRA is an internal format: %s\n", (fBGRAIsInternalFormat ? "YES": "NO"));
646 r.appendf("Support texture swizzle: %s\n", (fTextureSwizzleSupport ? "YES": "NO"));
647 r.appendf("Unpack Row length support: %s\n", (fUnpackRowLengthSupport ? "YES": "NO"));
648 r.appendf("Unpack Flip Y support: %s\n", (fUnpackFlipYSupport ? "YES": "NO"));
649 r.appendf("Pack Row length support: %s\n", (fPackRowLengthSupport ? "YES": "NO"));
650 r.appendf("Pack Flip Y support: %s\n", (fPackFlipYSupport ? "YES": "NO"));
651
652 r.appendf("Texture Usage support: %s\n", (fTextureUsageSupport ? "YES": "NO"));
653 r.appendf("Texture Storage support: %s\n", (fTexStorageSupport ? "YES": "NO"));
654 r.appendf("GL_R support: %s\n", (fTextureRedSupport ? "YES": "NO"));
655 r.appendf("GL_ARB_imaging support: %s\n", (fImagingSupport ? "YES": "NO"));
656 r.appendf("Two Format Limit: %s\n", (fTwoFormatLimit ? "YES": "NO"));
657 r.appendf("Fragment coord conventions support: %s\n",
658 (fFragCoordsConventionSupport ? "YES": "NO"));
659 r.appendf("Vertex array object support: %s\n", (fVertexArrayObjectSupport ? "YES": "NO"));
660 r.appendf("Use non-VBO for dynamic data: %s\n",
661 (fUseNonVBOVertexAndIndexDynamicData ? "YES" : "NO"));
662 r.appendf("Discard FrameBuffer support: %s\n", (fDiscardFBSupport ? "YES" : "NO"));
663 r.appendf("Full screen clear is free: %s\n", (fFullClearIsFree ? "YES" : "NO"));
664 return r;
665 }

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