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
GrGLCaps()14 GrGLCaps::GrGLCaps() {
15 this->reset();
16 }
17
reset()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
GrGLCaps(const GrGLCaps & caps)52 GrGLCaps::GrGLCaps(const GrGLCaps& caps) : GrDrawTargetCaps() {
53 *this = caps;
54 }
55
operator =(const GrGLCaps & caps)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
init(const GrGLContextInfo & ctxInfo,const GrGLInterface * gli)91 void GrGLCaps::init(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
92
93 this->reset();
94 if (!ctxInfo.isInitialized()) {
95 return;
96 }
97
98 GrGLBinding binding = ctxInfo.binding();
99 GrGLVersion version = ctxInfo.version();
100
101 /**************************************************************************
102 * Caps specific to GrGLCaps
103 **************************************************************************/
104
105 if (kES_GrGLBinding == binding) {
106 GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_VECTORS,
107 &fMaxFragmentUniformVectors);
108 } else {
109 SkASSERT(kDesktop_GrGLBinding == binding);
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 (kDesktop_GrGLBinding == binding) {
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 (kDesktop_GrGLBinding == binding) {
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 (kDesktop_GrGLBinding == binding) {
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 (kDesktop_GrGLBinding == binding) {
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 = (kES_GrGLBinding == binding) &&
173 ctxInfo.hasExtension("GL_ANGLE_texture_usage");
174
175 if (kDesktop_GrGLBinding == binding) {
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 (kDesktop_GrGLBinding == binding) {
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 = kDesktop_GrGLBinding == binding &&
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 = kES_GrGLBinding == binding;
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 (kDesktop_GrGLBinding == binding) {
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 (kES_GrGLBinding == binding) {
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 (kDesktop_GrGLBinding == binding) {
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 (kDesktop_GrGLBinding == binding) {
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 (kDesktop_GrGLBinding == binding) {
288 if (ctxInfo.version() >= GR_GL_VER(2,0) ||
289 ctxInfo.hasExtension("GL_ARB_texture_non_power_of_two")) {
290 fNPOTTextureTileSupport = true;
291 } else {
292 fNPOTTextureTileSupport = false;
293 }
294 } else {
295 // Unextended ES2 supports NPOT textures with clamp_to_edge and non-mip filters only
296 // ES3 has no limitations.
297 fNPOTTextureTileSupport = ctxInfo.version() >= GR_GL_VER(3,0) ||
298 ctxInfo.hasExtension("GL_OES_texture_npot");
299 }
300
301 fHWAALineSupport = (kDesktop_GrGLBinding == binding);
302
303 GR_GL_GetIntegerv(gli, GR_GL_MAX_TEXTURE_SIZE, &fMaxTextureSize);
304 GR_GL_GetIntegerv(gli, GR_GL_MAX_RENDERBUFFER_SIZE, &fMaxRenderTargetSize);
305 // Our render targets are always created with textures as the color
306 // attachment, hence this min:
307 fMaxRenderTargetSize = GrMin(fMaxTextureSize, fMaxRenderTargetSize);
308
309 fPathRenderingSupport = GR_GL_USE_NV_PATH_RENDERING &&
310 ctxInfo.hasExtension("GL_NV_path_rendering");
311
312 fDstReadInShaderSupport = kNone_FBFetchType != fFBFetchType;
313
314 // Disable scratch texture reuse on Mali and Adreno devices
315 fReuseScratchTextures = kARM_GrGLVendor != ctxInfo.vendor() &&
316 kQualcomm_GrGLVendor != ctxInfo.vendor();
317
318 // Enable supported shader-related caps
319 if (kDesktop_GrGLBinding == binding) {
320 fDualSourceBlendingSupport = ctxInfo.version() >= GR_GL_VER(3,3) ||
321 ctxInfo.hasExtension("GL_ARB_blend_func_extended");
322 fShaderDerivativeSupport = true;
323 // we don't support GL_ARB_geometry_shader4, just GL 3.2+ GS
324 fGeometryShaderSupport = ctxInfo.version() >= GR_GL_VER(3,2) &&
325 ctxInfo.glslGeneration() >= k150_GrGLSLGeneration;
326 } else {
327 fShaderDerivativeSupport = ctxInfo.hasExtension("GL_OES_standard_derivatives");
328 }
329
330 if (GrGLCaps::kES_IMG_MsToTexture_MSFBOType == fMSFBOType) {
331 GR_GL_GetIntegerv(gli, GR_GL_MAX_SAMPLES_IMG, &fMaxSampleCount);
332 } else if (GrGLCaps::kNone_MSFBOType != fMSFBOType) {
333 GR_GL_GetIntegerv(gli, GR_GL_MAX_SAMPLES, &fMaxSampleCount);
334 }
335
336 this->initConfigRenderableTable(ctxInfo);
337 }
338
initConfigRenderableTable(const GrGLContextInfo & ctxInfo)339 void GrGLCaps::initConfigRenderableTable(const GrGLContextInfo& ctxInfo) {
340
341 // OpenGL < 3.0
342 // no support for render targets unless the GL_ARB_framebuffer_object
343 // extension is supported (in which case we get ALPHA, RED, RG, RGB,
344 // RGBA (ALPHA8, RGBA4, RGBA8) for OpenGL > 1.1). Note that we
345 // probably don't get R8 in this case.
346
347 // OpenGL 3.0
348 // base color renderable: ALPHA, RED, RG, RGB, and RGBA
349 // sized derivatives: ALPHA8, R8, RGBA4, RGBA8
350
351 // >= OpenGL 3.1
352 // base color renderable: RED, RG, RGB, and RGBA
353 // sized derivatives: R8, RGBA4, RGBA8
354 // if the GL_ARB_compatibility extension is supported then we get back
355 // support for GL_ALPHA and ALPHA8
356
357 // GL_EXT_bgra adds BGRA render targets to any version
358
359 // ES 2.0
360 // color renderable: RGBA4, RGB5_A1, RGB565
361 // GL_EXT_texture_rg adds support for R8 as a color render target
362 // GL_OES_rgb8_rgba8 and/or GL_ARM_rgba8 adds support for RGBA8
363 // GL_EXT_texture_format_BGRA8888 and/or GL_APPLE_texture_format_BGRA8888 added BGRA support
364
365 // ES 3.0
366 // Same as ES 2.0 except R8 and RGBA8 are supported without extensions (the functions called
367 // below already account for this).
368
369 enum {
370 kNo_MSAA = 0,
371 kYes_MSAA = 1,
372 };
373
374 if (kDesktop_GrGLBinding == ctxInfo.binding()) {
375 // Post 3.0 we will get R8
376 // Prior to 3.0 we will get ALPHA8 (with GL_ARB_framebuffer_object)
377 if (ctxInfo.version() >= GR_GL_VER(3,0) ||
378 ctxInfo.hasExtension("GL_ARB_framebuffer_object")) {
379 fConfigRenderSupport[kAlpha_8_GrPixelConfig][kNo_MSAA] = true;
380 fConfigRenderSupport[kAlpha_8_GrPixelConfig][kYes_MSAA] = true;
381 }
382 } else {
383 // On ES we can only hope for R8
384 fConfigRenderSupport[kAlpha_8_GrPixelConfig][kNo_MSAA] = fTextureRedSupport;
385 fConfigRenderSupport[kAlpha_8_GrPixelConfig][kYes_MSAA] = fTextureRedSupport;
386 }
387
388 if (kDesktop_GrGLBinding != ctxInfo.binding()) {
389 // only available in ES
390 fConfigRenderSupport[kRGB_565_GrPixelConfig][kNo_MSAA] = true;
391 fConfigRenderSupport[kRGB_565_GrPixelConfig][kYes_MSAA] = true;
392 }
393
394 // we no longer support 444 as a render target
395 fConfigRenderSupport[kRGBA_4444_GrPixelConfig][kNo_MSAA] = false;
396 fConfigRenderSupport[kRGBA_4444_GrPixelConfig][kYes_MSAA] = false;
397
398 if (this->fRGBA8RenderbufferSupport) {
399 fConfigRenderSupport[kRGBA_8888_GrPixelConfig][kNo_MSAA] = true;
400 fConfigRenderSupport[kRGBA_8888_GrPixelConfig][kYes_MSAA] = true;
401 }
402
403 if (this->fBGRAFormatSupport) {
404 fConfigRenderSupport[kBGRA_8888_GrPixelConfig][kNo_MSAA] = true;
405 // The GL_EXT_texture_format_BGRA8888 extension does not add BGRA to the list of
406 // configs that are color-renderable and can be passed to glRenderBufferStorageMultisample.
407 // Chromium may have an extension to allow BGRA renderbuffers to work on desktop platforms.
408 if (ctxInfo.extensions().has("GL_CHROMIUM_renderbuffer_format_BGRA8888")) {
409 fConfigRenderSupport[kBGRA_8888_GrPixelConfig][kYes_MSAA] = true;
410 } else {
411 fConfigRenderSupport[kBGRA_8888_GrPixelConfig][kYes_MSAA] =
412 !fBGRAIsInternalFormat || !this->usesMSAARenderBuffers();
413 }
414 }
415
416 // If we don't support MSAA then undo any places above where we set a config as renderable with
417 // msaa.
418 if (kNone_MSFBOType == fMSFBOType) {
419 for (int i = 0; i < kGrPixelConfigCnt; ++i) {
420 fConfigRenderSupport[i][kYes_MSAA] = false;
421 }
422 }
423 }
424
readPixelsSupported(const GrGLInterface * intf,GrGLenum format,GrGLenum type) const425 bool GrGLCaps::readPixelsSupported(const GrGLInterface* intf,
426 GrGLenum format,
427 GrGLenum type) const {
428 if (GR_GL_RGBA == format && GR_GL_UNSIGNED_BYTE == type) {
429 // ES 2 guarantees this format is supported
430 return true;
431 }
432
433 if (!fTwoFormatLimit) {
434 // not limited by ES 2's constraints
435 return true;
436 }
437
438 GrGLint otherFormat = GR_GL_RGBA;
439 GrGLint otherType = GR_GL_UNSIGNED_BYTE;
440
441 // The other supported format/type combo supported for ReadPixels
442 // can change based on which render target is bound
443 GR_GL_GetIntegerv(intf,
444 GR_GL_IMPLEMENTATION_COLOR_READ_FORMAT,
445 &otherFormat);
446
447 GR_GL_GetIntegerv(intf,
448 GR_GL_IMPLEMENTATION_COLOR_READ_TYPE,
449 &otherType);
450
451 return (GrGLenum)otherFormat == format && (GrGLenum)otherType == type;
452 }
453
initFSAASupport(const GrGLContextInfo & ctxInfo,const GrGLInterface * gli)454 void GrGLCaps::initFSAASupport(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
455
456 fMSFBOType = kNone_MSFBOType;
457 if (kDesktop_GrGLBinding != ctxInfo.binding()) {
458 // We prefer the EXT/IMG extension over ES3 MSAA because we've observed
459 // ES3 driver bugs on at least one device with a tiled GPU (N10).
460 if (ctxInfo.hasExtension("GL_EXT_multisampled_render_to_texture")) {
461 fMSFBOType = kES_EXT_MsToTexture_MSFBOType;
462 } else if (ctxInfo.hasExtension("GL_IMG_multisampled_render_to_texture")) {
463 fMSFBOType = kES_IMG_MsToTexture_MSFBOType;
464 } else if (!GR_GL_IGNORE_ES3_MSAA && ctxInfo.version() >= GR_GL_VER(3,0)) {
465 fMSFBOType = GrGLCaps::kES_3_0_MSFBOType;
466 } else if (ctxInfo.hasExtension("GL_CHROMIUM_framebuffer_multisample")) {
467 // chrome's extension is equivalent to the EXT msaa
468 // and fbo_blit extensions.
469 fMSFBOType = kDesktop_EXT_MSFBOType;
470 } else if (ctxInfo.hasExtension("GL_APPLE_framebuffer_multisample")) {
471 fMSFBOType = kES_Apple_MSFBOType;
472 }
473 } else {
474 if ((ctxInfo.version() >= GR_GL_VER(3,0)) ||
475 ctxInfo.hasExtension("GL_ARB_framebuffer_object")) {
476 fMSFBOType = GrGLCaps::kDesktop_ARB_MSFBOType;
477 } else if (ctxInfo.hasExtension("GL_EXT_framebuffer_multisample") &&
478 ctxInfo.hasExtension("GL_EXT_framebuffer_blit")) {
479 fMSFBOType = GrGLCaps::kDesktop_EXT_MSFBOType;
480 }
481 }
482 }
483
484 namespace {
485 const GrGLuint kUnknownBitCount = GrGLStencilBuffer::kUnknownBitCount;
486 }
487
initStencilFormats(const GrGLContextInfo & ctxInfo)488 void GrGLCaps::initStencilFormats(const GrGLContextInfo& ctxInfo) {
489
490 // Build up list of legal stencil formats (though perhaps not supported on
491 // the particular gpu/driver) from most preferred to least.
492
493 // these consts are in order of most preferred to least preferred
494 // we don't bother with GL_STENCIL_INDEX1 or GL_DEPTH32F_STENCIL8
495
496 static const StencilFormat
497 // internal Format stencil bits total bits packed?
498 gS8 = {GR_GL_STENCIL_INDEX8, 8, 8, false},
499 gS16 = {GR_GL_STENCIL_INDEX16, 16, 16, false},
500 gD24S8 = {GR_GL_DEPTH24_STENCIL8, 8, 32, true },
501 gS4 = {GR_GL_STENCIL_INDEX4, 4, 4, false},
502 // gS = {GR_GL_STENCIL_INDEX, kUnknownBitCount, kUnknownBitCount, false},
503 gDS = {GR_GL_DEPTH_STENCIL, kUnknownBitCount, kUnknownBitCount, true };
504
505 if (kDesktop_GrGLBinding == ctxInfo.binding()) {
506 bool supportsPackedDS =
507 ctxInfo.version() >= GR_GL_VER(3,0) ||
508 ctxInfo.hasExtension("GL_EXT_packed_depth_stencil") ||
509 ctxInfo.hasExtension("GL_ARB_framebuffer_object");
510
511 // S1 thru S16 formats are in GL 3.0+, EXT_FBO, and ARB_FBO since we
512 // require FBO support we can expect these are legal formats and don't
513 // check. These also all support the unsized GL_STENCIL_INDEX.
514 fStencilFormats.push_back() = gS8;
515 fStencilFormats.push_back() = gS16;
516 if (supportsPackedDS) {
517 fStencilFormats.push_back() = gD24S8;
518 }
519 fStencilFormats.push_back() = gS4;
520 if (supportsPackedDS) {
521 fStencilFormats.push_back() = gDS;
522 }
523 } else {
524 // ES2 has STENCIL_INDEX8 without extensions but requires extensions
525 // for other formats.
526 // ES doesn't support using the unsized format.
527
528 fStencilFormats.push_back() = gS8;
529 //fStencilFormats.push_back() = gS16;
530 if (ctxInfo.version() >= GR_GL_VER(3,0) ||
531 ctxInfo.hasExtension("GL_OES_packed_depth_stencil")) {
532 fStencilFormats.push_back() = gD24S8;
533 }
534 if (ctxInfo.hasExtension("GL_OES_stencil4")) {
535 fStencilFormats.push_back() = gS4;
536 }
537 }
538 SkASSERT(0 == fStencilVerifiedColorConfigs.count());
539 fStencilVerifiedColorConfigs.push_back_n(fStencilFormats.count());
540 }
541
markColorConfigAndStencilFormatAsVerified(GrPixelConfig config,const GrGLStencilBuffer::Format & format)542 void GrGLCaps::markColorConfigAndStencilFormatAsVerified(
543 GrPixelConfig config,
544 const GrGLStencilBuffer::Format& format) {
545 #if !GR_GL_CHECK_FBO_STATUS_ONCE_PER_FORMAT
546 return;
547 #endif
548 SkASSERT((unsigned)config < (unsigned)kGrPixelConfigCnt);
549 SkASSERT(fStencilFormats.count() == fStencilVerifiedColorConfigs.count());
550 int count = fStencilFormats.count();
551 // we expect a really small number of possible formats so linear search
552 // should be OK
553 SkASSERT(count < 16);
554 for (int i = 0; i < count; ++i) {
555 if (format.fInternalFormat ==
556 fStencilFormats[i].fInternalFormat) {
557 fStencilVerifiedColorConfigs[i].markVerified(config);
558 return;
559 }
560 }
561 GrCrash("Why are we seeing a stencil format that "
562 "GrGLCaps doesn't know about.");
563 }
564
isColorConfigAndStencilFormatVerified(GrPixelConfig config,const GrGLStencilBuffer::Format & format) const565 bool GrGLCaps::isColorConfigAndStencilFormatVerified(
566 GrPixelConfig config,
567 const GrGLStencilBuffer::Format& format) const {
568 #if !GR_GL_CHECK_FBO_STATUS_ONCE_PER_FORMAT
569 return false;
570 #endif
571 SkASSERT((unsigned)config < (unsigned)kGrPixelConfigCnt);
572 int count = fStencilFormats.count();
573 // we expect a really small number of possible formats so linear search
574 // should be OK
575 SkASSERT(count < 16);
576 for (int i = 0; i < count; ++i) {
577 if (format.fInternalFormat ==
578 fStencilFormats[i].fInternalFormat) {
579 return fStencilVerifiedColorConfigs[i].isVerified(config);
580 }
581 }
582 GrCrash("Why are we seeing a stencil format that "
583 "GLCaps doesn't know about.");
584 return false;
585 }
586
dump() const587 SkString GrGLCaps::dump() const {
588
589 SkString r = INHERITED::dump();
590
591 r.appendf("--- GL-Specific ---\n");
592 for (int i = 0; i < fStencilFormats.count(); ++i) {
593 r.appendf("Stencil Format %d, stencil bits: %02d, total bits: %02d\n",
594 i,
595 fStencilFormats[i].fStencilBits,
596 fStencilFormats[i].fTotalBits);
597 }
598
599 static const char* kMSFBOExtStr[] = {
600 "None",
601 "ARB",
602 "EXT",
603 "ES 3.0",
604 "Apple",
605 "IMG MS To Texture",
606 "EXT MS To Texture",
607 };
608 GR_STATIC_ASSERT(0 == kNone_MSFBOType);
609 GR_STATIC_ASSERT(1 == kDesktop_ARB_MSFBOType);
610 GR_STATIC_ASSERT(2 == kDesktop_EXT_MSFBOType);
611 GR_STATIC_ASSERT(3 == kES_3_0_MSFBOType);
612 GR_STATIC_ASSERT(4 == kES_Apple_MSFBOType);
613 GR_STATIC_ASSERT(5 == kES_IMG_MsToTexture_MSFBOType);
614 GR_STATIC_ASSERT(6 == kES_EXT_MsToTexture_MSFBOType);
615 GR_STATIC_ASSERT(GR_ARRAY_COUNT(kMSFBOExtStr) == kLast_MSFBOType + 1);
616
617 static const char* kFBFetchTypeStr[] = {
618 "None",
619 "EXT",
620 "NV",
621 };
622 GR_STATIC_ASSERT(0 == kNone_FBFetchType);
623 GR_STATIC_ASSERT(1 == kEXT_FBFetchType);
624 GR_STATIC_ASSERT(2 == kNV_FBFetchType);
625 GR_STATIC_ASSERT(GR_ARRAY_COUNT(kFBFetchTypeStr) == kLast_FBFetchType + 1);
626
627
628 r.appendf("Core Profile: %s\n", (fIsCoreProfile ? "YES" : "NO"));
629 r.appendf("Fixed Function Support: %s\n", (fFixedFunctionSupport ? "YES" : "NO"));
630 r.appendf("MSAA Type: %s\n", kMSFBOExtStr[fMSFBOType]);
631 r.appendf("FB Fetch Type: %s\n", kFBFetchTypeStr[fFBFetchType]);
632 r.appendf("Max FS Uniform Vectors: %d\n", fMaxFragmentUniformVectors);
633 r.appendf("Max FS Texture Units: %d\n", fMaxFragmentTextureUnits);
634 if (fFixedFunctionSupport) {
635 r.appendf("Max Fixed Function Texture Coords: %d\n", fMaxFixedFunctionTextureCoords);
636 }
637 r.appendf("Max Vertex Attributes: %d\n", fMaxVertexAttributes);
638 r.appendf("Support RGBA8 Render Buffer: %s\n", (fRGBA8RenderbufferSupport ? "YES": "NO"));
639 r.appendf("BGRA support: %s\n", (fBGRAFormatSupport ? "YES": "NO"));
640 r.appendf("BGRA is an internal format: %s\n", (fBGRAIsInternalFormat ? "YES": "NO"));
641 r.appendf("Support texture swizzle: %s\n", (fTextureSwizzleSupport ? "YES": "NO"));
642 r.appendf("Unpack Row length support: %s\n", (fUnpackRowLengthSupport ? "YES": "NO"));
643 r.appendf("Unpack Flip Y support: %s\n", (fUnpackFlipYSupport ? "YES": "NO"));
644 r.appendf("Pack Row length support: %s\n", (fPackRowLengthSupport ? "YES": "NO"));
645 r.appendf("Pack Flip Y support: %s\n", (fPackFlipYSupport ? "YES": "NO"));
646
647 r.appendf("Texture Usage support: %s\n", (fTextureUsageSupport ? "YES": "NO"));
648 r.appendf("Texture Storage support: %s\n", (fTexStorageSupport ? "YES": "NO"));
649 r.appendf("GL_R support: %s\n", (fTextureRedSupport ? "YES": "NO"));
650 r.appendf("GL_ARB_imaging support: %s\n", (fImagingSupport ? "YES": "NO"));
651 r.appendf("Two Format Limit: %s\n", (fTwoFormatLimit ? "YES": "NO"));
652 r.appendf("Fragment coord conventions support: %s\n",
653 (fFragCoordsConventionSupport ? "YES": "NO"));
654 r.appendf("Vertex array object support: %s\n", (fVertexArrayObjectSupport ? "YES": "NO"));
655 r.appendf("Use non-VBO for dynamic data: %s\n",
656 (fUseNonVBOVertexAndIndexDynamicData ? "YES" : "NO"));
657 r.appendf("Discard FrameBuffer support: %s\n", (fDiscardFBSupport ? "YES" : "NO"));
658 r.appendf("Full screen clear is free: %s\n", (fFullClearIsFree ? "YES" : "NO"));
659 return r;
660 }
661