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bsalomon@google.comf7fa8062012-02-14 14:09:57 +00001/*
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"
robertphillips@google.com6177e692013-02-28 20:16:25 +000010#include "GrGLContext.h"
bsalomon@google.comc9668ec2012-04-11 18:16:41 +000011#include "SkTSearch.h"
bsalomon@google.com20f7f172013-05-17 19:05:03 +000012#include "SkTSort.h"
bsalomon@google.comf7fa8062012-02-14 14:09:57 +000013
bsalomon@google.combcce8922013-03-25 15:38:39 +000014SK_DEFINE_INST_COUNT(GrGLCaps)
15
bsalomon@google.comf7fa8062012-02-14 14:09:57 +000016GrGLCaps::GrGLCaps() {
17 this->reset();
18}
19
20void GrGLCaps::reset() {
bsalomon@google.combcce8922013-03-25 15:38:39 +000021 INHERITED::reset();
22
bsalomon@google.comf7fa8062012-02-14 14:09:57 +000023 fVerifiedColorConfigs.reset();
24 fStencilFormats.reset();
25 fStencilVerifiedColorConfigs.reset();
26 fMSFBOType = kNone_MSFBOType;
bsalomon@google.comc9668ec2012-04-11 18:16:41 +000027 fCoverageAAType = kNone_CoverageAAType;
bsalomon@google.com6b0cf022013-05-03 13:35:14 +000028 fFBFetchType = kNone_FBFetchType;
bsalomon@google.comf7fa8062012-02-14 14:09:57 +000029 fMaxFragmentUniformVectors = 0;
bsalomon@google.com60da4172012-06-01 19:25:00 +000030 fMaxVertexAttributes = 0;
commit-bot@chromium.orga15f7e52013-06-05 23:29:25 +000031 fMaxFragmentTextureUnits = 0;
bsalomon@google.comf7fa8062012-02-14 14:09:57 +000032 fRGBA8RenderbufferSupport = false;
33 fBGRAFormatSupport = false;
34 fBGRAIsInternalFormat = false;
35 fTextureSwizzleSupport = false;
36 fUnpackRowLengthSupport = false;
37 fUnpackFlipYSupport = false;
38 fPackRowLengthSupport = false;
39 fPackFlipYSupport = false;
40 fTextureUsageSupport = false;
41 fTexStorageSupport = false;
robertphillips@google.com443e5a52012-04-30 20:01:21 +000042 fTextureRedSupport = false;
bsalomon@google.come76b7cc2012-06-18 12:47:06 +000043 fImagingSupport = false;
robertphillips@google.com1d89c932012-06-27 19:31:41 +000044 fTwoFormatLimit = false;
bsalomon@google.com706f6682012-10-23 14:53:55 +000045 fFragCoordsConventionSupport = false;
bsalomon@google.com07631cf2013-03-05 14:14:58 +000046 fVertexArrayObjectSupport = false;
bsalomon@google.com96966a52013-02-21 16:34:21 +000047 fUseNonVBOVertexAndIndexDynamicData = false;
bsalomon@google.com2b1b8c02013-02-28 22:06:02 +000048 fIsCoreProfile = false;
robertphillips@google.coma6ffb582013-04-29 16:50:17 +000049 fDiscardFBSupport = false;
bsalomon@google.comf7fa8062012-02-14 14:09:57 +000050}
51
bsalomon@google.comc26d94f2013-03-25 18:19:00 +000052GrGLCaps::GrGLCaps(const GrGLCaps& caps) : GrDrawTargetCaps() {
bsalomon@google.comf7fa8062012-02-14 14:09:57 +000053 *this = caps;
54}
55
56GrGLCaps& GrGLCaps::operator = (const GrGLCaps& caps) {
bsalomon@google.combcce8922013-03-25 15:38:39 +000057 INHERITED::operator=(caps);
bsalomon@google.comf7fa8062012-02-14 14:09:57 +000058 fVerifiedColorConfigs = caps.fVerifiedColorConfigs;
59 fStencilFormats = caps.fStencilFormats;
60 fStencilVerifiedColorConfigs = caps.fStencilVerifiedColorConfigs;
61 fMaxFragmentUniformVectors = caps.fMaxFragmentUniformVectors;
bsalomon@google.com60da4172012-06-01 19:25:00 +000062 fMaxVertexAttributes = caps.fMaxVertexAttributes;
commit-bot@chromium.orga15f7e52013-06-05 23:29:25 +000063 fMaxFragmentTextureUnits = caps.fMaxFragmentTextureUnits;
bsalomon@google.comf7fa8062012-02-14 14:09:57 +000064 fMSFBOType = caps.fMSFBOType;
bsalomon@google.comc9668ec2012-04-11 18:16:41 +000065 fCoverageAAType = caps.fCoverageAAType;
66 fMSAACoverageModes = caps.fMSAACoverageModes;
bsalomon@google.com6b0cf022013-05-03 13:35:14 +000067 fFBFetchType = caps.fFBFetchType;
bsalomon@google.comf7fa8062012-02-14 14:09:57 +000068 fRGBA8RenderbufferSupport = caps.fRGBA8RenderbufferSupport;
69 fBGRAFormatSupport = caps.fBGRAFormatSupport;
70 fBGRAIsInternalFormat = caps.fBGRAIsInternalFormat;
71 fTextureSwizzleSupport = caps.fTextureSwizzleSupport;
72 fUnpackRowLengthSupport = caps.fUnpackRowLengthSupport;
73 fUnpackFlipYSupport = caps.fUnpackFlipYSupport;
74 fPackRowLengthSupport = caps.fPackRowLengthSupport;
75 fPackFlipYSupport = caps.fPackFlipYSupport;
76 fTextureUsageSupport = caps.fTextureUsageSupport;
77 fTexStorageSupport = caps.fTexStorageSupport;
robertphillips@google.com443e5a52012-04-30 20:01:21 +000078 fTextureRedSupport = caps.fTextureRedSupport;
bsalomon@google.come76b7cc2012-06-18 12:47:06 +000079 fImagingSupport = caps.fImagingSupport;
robertphillips@google.com1d89c932012-06-27 19:31:41 +000080 fTwoFormatLimit = caps.fTwoFormatLimit;
bsalomon@google.com706f6682012-10-23 14:53:55 +000081 fFragCoordsConventionSupport = caps.fFragCoordsConventionSupport;
bsalomon@google.com07631cf2013-03-05 14:14:58 +000082 fVertexArrayObjectSupport = caps.fVertexArrayObjectSupport;
bsalomon@google.com96966a52013-02-21 16:34:21 +000083 fUseNonVBOVertexAndIndexDynamicData = caps.fUseNonVBOVertexAndIndexDynamicData;
bsalomon@google.com2b1b8c02013-02-28 22:06:02 +000084 fIsCoreProfile = caps.fIsCoreProfile;
robertphillips@google.coma6ffb582013-04-29 16:50:17 +000085 fDiscardFBSupport = caps.fDiscardFBSupport;
bsalomon@google.comf7fa8062012-02-14 14:09:57 +000086
87 return *this;
88}
89
robertphillips@google.com6177e692013-02-28 20:16:25 +000090void GrGLCaps::init(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
bsalomon@google.comf7fa8062012-02-14 14:09:57 +000091
92 this->reset();
93 if (!ctxInfo.isInitialized()) {
94 return;
95 }
96
bsalomon@google.comf7fa8062012-02-14 14:09:57 +000097 GrGLBinding binding = ctxInfo.binding();
98 GrGLVersion version = ctxInfo.version();
99
bsalomon@google.combcce8922013-03-25 15:38:39 +0000100 /**************************************************************************
101 * Caps specific to GrGLCaps
102 **************************************************************************/
103
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000104 if (kES2_GrGLBinding == binding) {
105 GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_VECTORS,
106 &fMaxFragmentUniformVectors);
107 } else {
108 GrAssert(kDesktop_GrGLBinding == binding);
109 GrGLint max;
110 GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, &max);
111 fMaxFragmentUniformVectors = max / 4;
112 }
bsalomon@google.com60da4172012-06-01 19:25:00 +0000113 GR_GL_GetIntegerv(gli, GR_GL_MAX_VERTEX_ATTRIBS, &fMaxVertexAttributes);
commit-bot@chromium.orga15f7e52013-06-05 23:29:25 +0000114 GR_GL_GetIntegerv(gli, GR_GL_MAX_TEXTURE_IMAGE_UNITS, &fMaxFragmentTextureUnits);
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000115
116 if (kDesktop_GrGLBinding == binding) {
117 fRGBA8RenderbufferSupport = true;
118 } else {
119 fRGBA8RenderbufferSupport = ctxInfo.hasExtension("GL_OES_rgb8_rgba8") ||
120 ctxInfo.hasExtension("GL_ARM_rgba8");
121 }
122
123 if (kDesktop_GrGLBinding == binding) {
124 fBGRAFormatSupport = version >= GR_GL_VER(1,2) ||
125 ctxInfo.hasExtension("GL_EXT_bgra");
126 } else {
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000127 if (ctxInfo.hasExtension("GL_APPLE_texture_format_BGRA8888")) {
128 fBGRAFormatSupport = true;
129 } else if (ctxInfo.hasExtension("GL_EXT_texture_format_BGRA8888")) {
130 fBGRAFormatSupport = true;
131 fBGRAIsInternalFormat = true;
132 }
133 GrAssert(fBGRAFormatSupport ||
bsalomon@google.com0342a852012-08-20 19:22:38 +0000134 kSkia8888_GrPixelConfig != kBGRA_8888_GrPixelConfig);
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000135 }
136
137 if (kDesktop_GrGLBinding == binding) {
138 fTextureSwizzleSupport = version >= GR_GL_VER(3,3) ||
139 ctxInfo.hasExtension("GL_ARB_texture_swizzle");
140 } else {
141 fTextureSwizzleSupport = false;
142 }
143
144 if (kDesktop_GrGLBinding == binding) {
145 fUnpackRowLengthSupport = true;
146 fUnpackFlipYSupport = false;
147 fPackRowLengthSupport = true;
148 fPackFlipYSupport = false;
149 } else {
150 fUnpackRowLengthSupport =ctxInfo.hasExtension("GL_EXT_unpack_subimage");
151 fUnpackFlipYSupport = ctxInfo.hasExtension("GL_CHROMIUM_flipy");
152 // no extension for pack row length
153 fPackRowLengthSupport = false;
154 fPackFlipYSupport =
155 ctxInfo.hasExtension("GL_ANGLE_pack_reverse_row_order");
156 }
157
158 fTextureUsageSupport = (kES2_GrGLBinding == binding) &&
159 ctxInfo.hasExtension("GL_ANGLE_texture_usage");
160
161 // Tex storage is in desktop 4.2 and can be an extension to desktop or ES.
162 fTexStorageSupport = (kDesktop_GrGLBinding == binding &&
163 version >= GR_GL_VER(4,2)) ||
164 ctxInfo.hasExtension("GL_ARB_texture_storage") ||
165 ctxInfo.hasExtension("GL_EXT_texture_storage");
166
commit-bot@chromium.org459104c2013-06-14 14:42:56 +0000167 // ARB_texture_rg is part of OpenGL 3.0, but mesa doesn't support it if
168 // it doesn't have ARB_texture_rg extension.
robertphillips@google.com443e5a52012-04-30 20:01:21 +0000169 if (kDesktop_GrGLBinding == binding) {
commit-bot@chromium.org459104c2013-06-14 14:42:56 +0000170 if (ctxInfo.isMesa()) {
171 fTextureRedSupport = ctxInfo.hasExtension("GL_ARB_texture_rg");
172 } else {
173 fTextureRedSupport = version >= GR_GL_VER(3,0) ||
174 ctxInfo.hasExtension("GL_ARB_texture_rg");
175 }
robertphillips@google.com443e5a52012-04-30 20:01:21 +0000176 } else {
177 fTextureRedSupport = ctxInfo.hasExtension("GL_EXT_texture_rg");
178 }
179
bsalomon@google.come76b7cc2012-06-18 12:47:06 +0000180 fImagingSupport = kDesktop_GrGLBinding == binding &&
181 ctxInfo.hasExtension("GL_ARB_imaging");
182
robertphillips@google.com1d89c932012-06-27 19:31:41 +0000183 // ES 2 only guarantees RGBA/uchar + one other format/type combo for
184 // ReadPixels. The other format has to checked at run-time since it
185 // can change based on which render target is bound
186 fTwoFormatLimit = kES2_GrGLBinding == binding;
187
bsalomon@google.com706f6682012-10-23 14:53:55 +0000188 // Known issue on at least some Intel platforms:
189 // http://code.google.com/p/skia/issues/detail?id=946
190 if (kIntel_GrGLVendor != ctxInfo.vendor()) {
191 fFragCoordsConventionSupport = ctxInfo.glslGeneration() >= k150_GrGLSLGeneration ||
192 ctxInfo.hasExtension("GL_ARB_fragment_coord_conventions");
193 }
194
bsalomon@google.com3012ded2013-02-22 16:44:04 +0000195 // SGX and Mali GPUs that are based on a tiled-deferred architecture that have trouble with
196 // frequently changing VBOs. We've measured a performance increase using non-VBO vertex
197 // data for dynamic content on these GPUs. Perhaps we should read the renderer string and
198 // limit this decision to specific GPU families rather than basing it on the vendor alone.
199 if (!GR_GL_MUST_USE_VBO &&
200 (kARM_GrGLVendor == ctxInfo.vendor() || kImagination_GrGLVendor == ctxInfo.vendor())) {
bsalomon@google.com96966a52013-02-21 16:34:21 +0000201 fUseNonVBOVertexAndIndexDynamicData = true;
202 }
skia.committer@gmail.com631cdcb2013-03-01 12:12:55 +0000203
bsalomon@google.com2b1b8c02013-02-28 22:06:02 +0000204 if (kDesktop_GrGLBinding == binding && version >= GR_GL_VER(3, 2)) {
205 GrGLint profileMask;
206 GR_GL_GetIntegerv(gli, GR_GL_CONTEXT_PROFILE_MASK, &profileMask);
207 fIsCoreProfile = SkToBool(profileMask & GR_GL_CONTEXT_CORE_PROFILE_BIT);
208 }
bsalomon@google.com96966a52013-02-21 16:34:21 +0000209
robertphillips@google.coma6ffb582013-04-29 16:50:17 +0000210 fDiscardFBSupport = ctxInfo.hasExtension("GL_EXT_discard_framebuffer");
211
bsalomon@google.com07631cf2013-03-05 14:14:58 +0000212 if (kDesktop_GrGLBinding == binding) {
213 fVertexArrayObjectSupport = version >= GR_GL_VER(3, 0) ||
214 ctxInfo.hasExtension("GL_ARB_vertex_array_object");
215 } else {
216 fVertexArrayObjectSupport = ctxInfo.hasExtension("GL_OES_vertex_array_object");
217 }
218
bsalomon@google.com6b0cf022013-05-03 13:35:14 +0000219 if (kES2_GrGLBinding == binding) {
220 if (ctxInfo.hasExtension("GL_EXT_shader_framebuffer_fetch")) {
221 fFBFetchType = kEXT_FBFetchType;
222 } else if (ctxInfo.hasExtension("GL_NV_shader_framebuffer_fetch")) {
223 fFBFetchType = kNV_FBFetchType;
224 }
225 }
226
robertphillips@google.com6177e692013-02-28 20:16:25 +0000227 this->initFSAASupport(ctxInfo, gli);
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000228 this->initStencilFormats(ctxInfo);
bsalomon@google.combcce8922013-03-25 15:38:39 +0000229
230 /**************************************************************************
bsalomon@google.comc26d94f2013-03-25 18:19:00 +0000231 * GrDrawTargetCaps fields
bsalomon@google.combcce8922013-03-25 15:38:39 +0000232 **************************************************************************/
bsalomon@google.combcce8922013-03-25 15:38:39 +0000233 GrGLint numFormats;
234 GR_GL_GetIntegerv(gli, GR_GL_NUM_COMPRESSED_TEXTURE_FORMATS, &numFormats);
bungeman@google.com71033442013-05-01 14:21:20 +0000235 if (numFormats) {
236 SkAutoSTMalloc<10, GrGLint> formats(numFormats);
237 GR_GL_GetIntegerv(gli, GR_GL_COMPRESSED_TEXTURE_FORMATS, formats);
238 for (int i = 0; i < numFormats; ++i) {
239 if (formats[i] == GR_GL_PALETTE8_RGBA8) {
240 f8BitPaletteSupport = true;
241 break;
242 }
bsalomon@google.combcce8922013-03-25 15:38:39 +0000243 }
244 }
245
246 if (kDesktop_GrGLBinding == binding) {
247 // we could also look for GL_ATI_separate_stencil extension or
248 // GL_EXT_stencil_two_side but they use different function signatures
249 // than GL2.0+ (and than each other).
250 fTwoSidedStencilSupport = (ctxInfo.version() >= GR_GL_VER(2,0));
251 // supported on GL 1.4 and higher or by extension
252 fStencilWrapOpsSupport = (ctxInfo.version() >= GR_GL_VER(1,4)) ||
253 ctxInfo.hasExtension("GL_EXT_stencil_wrap");
254 } else {
255 // ES 2 has two sided stencil and stencil wrap
256 fTwoSidedStencilSupport = true;
257 fStencilWrapOpsSupport = true;
258 }
259
260 if (kDesktop_GrGLBinding == binding) {
261 fBufferLockSupport = true; // we require VBO support and the desktop VBO extension includes
262 // glMapBuffer.
263 } else {
264 fBufferLockSupport = ctxInfo.hasExtension("GL_OES_mapbuffer");
265 }
266
267 if (kDesktop_GrGLBinding == binding) {
268 if (ctxInfo.version() >= GR_GL_VER(2,0) ||
269 ctxInfo.hasExtension("GL_ARB_texture_non_power_of_two")) {
270 fNPOTTextureTileSupport = true;
271 } else {
272 fNPOTTextureTileSupport = false;
273 }
274 } else {
275 // Unextended ES2 supports NPOT textures with clamp_to_edge and non-mip filters only
276 fNPOTTextureTileSupport = ctxInfo.hasExtension("GL_OES_texture_npot");
277 }
278
279 fHWAALineSupport = (kDesktop_GrGLBinding == binding);
280
281 GR_GL_GetIntegerv(gli, GR_GL_MAX_TEXTURE_SIZE, &fMaxTextureSize);
282 GR_GL_GetIntegerv(gli, GR_GL_MAX_RENDERBUFFER_SIZE, &fMaxRenderTargetSize);
283 // Our render targets are always created with textures as the color
284 // attachment, hence this min:
285 fMaxRenderTargetSize = GrMin(fMaxTextureSize, fMaxRenderTargetSize);
286
287 fPathStencilingSupport = GR_GL_USE_NV_PATH_RENDERING &&
288 ctxInfo.hasExtension("GL_NV_path_rendering");
289
bsalomon@google.com6b0cf022013-05-03 13:35:14 +0000290 fDstReadInShaderSupport = kNone_FBFetchType != fFBFetchType;
291
commit-bot@chromium.orgb8356522013-07-18 22:26:39 +0000292 fReuseScratchTextures = kARM_GrGLVendor != ctxInfo.vendor();
293
bsalomon@google.combcce8922013-03-25 15:38:39 +0000294 // Enable supported shader-related caps
295 if (kDesktop_GrGLBinding == binding) {
296 fDualSourceBlendingSupport = ctxInfo.version() >= GR_GL_VER(3,3) ||
297 ctxInfo.hasExtension("GL_ARB_blend_func_extended");
298 fShaderDerivativeSupport = true;
299 // we don't support GL_ARB_geometry_shader4, just GL 3.2+ GS
300 fGeometryShaderSupport = ctxInfo.version() >= GR_GL_VER(3,2) &&
301 ctxInfo.glslGeneration() >= k150_GrGLSLGeneration;
302 } else {
303 fShaderDerivativeSupport = ctxInfo.hasExtension("GL_OES_standard_derivatives");
304 }
305
bsalomon@google.com347c3822013-05-01 20:10:01 +0000306 if (GrGLCaps::kES_IMG_MsToTexture_MSFBOType == fMSFBOType) {
bsalomon@google.combcce8922013-03-25 15:38:39 +0000307 GR_GL_GetIntegerv(gli, GR_GL_MAX_SAMPLES_IMG, &fMaxSampleCount);
308 } else if (GrGLCaps::kNone_MSFBOType != fMSFBOType) {
309 GR_GL_GetIntegerv(gli, GR_GL_MAX_SAMPLES, &fMaxSampleCount);
310 }
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000311}
312
robertphillips@google.com1d89c932012-06-27 19:31:41 +0000313bool GrGLCaps::readPixelsSupported(const GrGLInterface* intf,
rmistry@google.comfbfcd562012-08-23 18:09:54 +0000314 GrGLenum format,
315 GrGLenum type) const {
robertphillips@google.com1d89c932012-06-27 19:31:41 +0000316 if (GR_GL_RGBA == format && GR_GL_UNSIGNED_BYTE == type) {
317 // ES 2 guarantees this format is supported
robertphillips@google.comeca2dfb2012-06-27 20:13:49 +0000318 return true;
robertphillips@google.com1d89c932012-06-27 19:31:41 +0000319 }
320
321 if (!fTwoFormatLimit) {
322 // not limited by ES 2's constraints
323 return true;
324 }
325
bsalomon@google.com548a4332012-07-11 19:45:22 +0000326 GrGLint otherFormat = GR_GL_RGBA;
327 GrGLint otherType = GR_GL_UNSIGNED_BYTE;
robertphillips@google.com1d89c932012-06-27 19:31:41 +0000328
329 // The other supported format/type combo supported for ReadPixels
330 // can change based on which render target is bound
rmistry@google.comfbfcd562012-08-23 18:09:54 +0000331 GR_GL_GetIntegerv(intf,
robertphillips@google.com1d89c932012-06-27 19:31:41 +0000332 GR_GL_IMPLEMENTATION_COLOR_READ_FORMAT,
333 &otherFormat);
334
rmistry@google.comfbfcd562012-08-23 18:09:54 +0000335 GR_GL_GetIntegerv(intf,
robertphillips@google.com1d89c932012-06-27 19:31:41 +0000336 GR_GL_IMPLEMENTATION_COLOR_READ_TYPE,
337 &otherType);
338
bsalomon@google.com548a4332012-07-11 19:45:22 +0000339 return (GrGLenum)otherFormat == format && (GrGLenum)otherType == type;
robertphillips@google.com1d89c932012-06-27 19:31:41 +0000340}
341
bsalomon@google.comc9668ec2012-04-11 18:16:41 +0000342namespace {
bsalomon@google.com20f7f172013-05-17 19:05:03 +0000343bool cov_mode_less(const GrGLCaps::MSAACoverageMode& left,
344 const GrGLCaps::MSAACoverageMode& right) {
345 if (left.fCoverageSampleCnt < right.fCoverageSampleCnt) {
346 return true;
347 } else if (right.fCoverageSampleCnt < left.fCoverageSampleCnt) {
348 return false;
349 } else if (left.fColorSampleCnt < right.fColorSampleCnt) {
350 return true;
bsalomon@google.comc9668ec2012-04-11 18:16:41 +0000351 }
bsalomon@google.com20f7f172013-05-17 19:05:03 +0000352 return false;
bsalomon@google.comc9668ec2012-04-11 18:16:41 +0000353}
354}
355
robertphillips@google.com6177e692013-02-28 20:16:25 +0000356void GrGLCaps::initFSAASupport(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000357
358 fMSFBOType = kNone_MSFBOType;
359 if (kDesktop_GrGLBinding != ctxInfo.binding()) {
360 if (ctxInfo.hasExtension("GL_CHROMIUM_framebuffer_multisample")) {
361 // chrome's extension is equivalent to the EXT msaa
362 // and fbo_blit extensions.
bsalomon@google.com347c3822013-05-01 20:10:01 +0000363 fMSFBOType = kDesktop_EXT_MSFBOType;
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000364 } else if (ctxInfo.hasExtension("GL_APPLE_framebuffer_multisample")) {
bsalomon@google.com347c3822013-05-01 20:10:01 +0000365 fMSFBOType = kES_Apple_MSFBOType;
366 } else if (ctxInfo.hasExtension("GL_EXT_multisampled_render_to_texture")) {
367 fMSFBOType = kES_EXT_MsToTexture_MSFBOType;
bsalomon@google.comf3a60c02013-03-19 19:06:09 +0000368 } else if (ctxInfo.hasExtension("GL_IMG_multisampled_render_to_texture")) {
bsalomon@google.com347c3822013-05-01 20:10:01 +0000369 fMSFBOType = kES_IMG_MsToTexture_MSFBOType;
bsalomon@google.comc9668ec2012-04-11 18:16:41 +0000370 }
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000371 } else {
372 if ((ctxInfo.version() >= GR_GL_VER(3,0)) ||
373 ctxInfo.hasExtension("GL_ARB_framebuffer_object")) {
bsalomon@google.com347c3822013-05-01 20:10:01 +0000374 fMSFBOType = GrGLCaps::kDesktop_ARB_MSFBOType;
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000375 } else if (ctxInfo.hasExtension("GL_EXT_framebuffer_multisample") &&
376 ctxInfo.hasExtension("GL_EXT_framebuffer_blit")) {
bsalomon@google.com347c3822013-05-01 20:10:01 +0000377 fMSFBOType = GrGLCaps::kDesktop_EXT_MSFBOType;
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000378 }
bsalomon@google.comc9668ec2012-04-11 18:16:41 +0000379 // TODO: We could populate fMSAACoverageModes using GetInternalformativ
380 // on GL 4.2+. It's format-specific, though. See also
381 // http://code.google.com/p/skia/issues/detail?id=470 about using actual
382 // rather than requested sample counts in cache key.
383 if (ctxInfo.hasExtension("GL_NV_framebuffer_multisample_coverage")) {
384 fCoverageAAType = kNVDesktop_CoverageAAType;
385 GrGLint count;
robertphillips@google.com6177e692013-02-28 20:16:25 +0000386 GR_GL_GetIntegerv(gli,
bsalomon@google.comc9668ec2012-04-11 18:16:41 +0000387 GR_GL_MAX_MULTISAMPLE_COVERAGE_MODES,
388 &count);
389 fMSAACoverageModes.setCount(count);
robertphillips@google.com6177e692013-02-28 20:16:25 +0000390 GR_GL_GetIntegerv(gli,
bsalomon@google.comc9668ec2012-04-11 18:16:41 +0000391 GR_GL_MULTISAMPLE_COVERAGE_MODES,
392 (int*)&fMSAACoverageModes[0]);
393 // The NV driver seems to return the modes already sorted but the
394 // spec doesn't require this. So we sort.
bsalomon@google.com20f7f172013-05-17 19:05:03 +0000395 typedef SkTLessFunctionToFunctorAdaptor<MSAACoverageMode, cov_mode_less> SortFunctor;
396 SortFunctor sortFunctor;
397 SkTQSort<MSAACoverageMode, SortFunctor>(fMSAACoverageModes.begin(),
398 fMSAACoverageModes.end() - 1,
399 sortFunctor);
bsalomon@google.comc9668ec2012-04-11 18:16:41 +0000400 }
401 }
402}
403
bsalomon@google.com8a70eef2013-03-19 13:58:55 +0000404const GrGLCaps::MSAACoverageMode& GrGLCaps::getMSAACoverageMode(int desiredSampleCount) const {
bsalomon@google.comc9668ec2012-04-11 18:16:41 +0000405 static const MSAACoverageMode kNoneMode = {0, 0};
406 if (0 == fMSAACoverageModes.count()) {
407 return kNoneMode;
408 } else {
409 GrAssert(kNone_CoverageAAType != fCoverageAAType);
410 int max = (fMSAACoverageModes.end() - 1)->fCoverageSampleCnt;
411 desiredSampleCount = GrMin(desiredSampleCount, max);
412 MSAACoverageMode desiredMode = {desiredSampleCount, 0};
bsalomon@google.com20f7f172013-05-17 19:05:03 +0000413 int idx = SkTSearch<const MSAACoverageMode, cov_mode_less>(&fMSAACoverageModes[0],
414 fMSAACoverageModes.count(),
415 desiredMode,
416 sizeof(MSAACoverageMode));
bsalomon@google.comc9668ec2012-04-11 18:16:41 +0000417 if (idx < 0) {
418 idx = ~idx;
419 }
420 GrAssert(idx >= 0 && idx < fMSAACoverageModes.count());
421 return fMSAACoverageModes[idx];
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000422 }
423}
424
425namespace {
426const GrGLuint kUnknownBitCount = GrGLStencilBuffer::kUnknownBitCount;
427}
428
429void GrGLCaps::initStencilFormats(const GrGLContextInfo& ctxInfo) {
430
431 // Build up list of legal stencil formats (though perhaps not supported on
432 // the particular gpu/driver) from most preferred to least.
433
434 // these consts are in order of most preferred to least preferred
435 // we don't bother with GL_STENCIL_INDEX1 or GL_DEPTH32F_STENCIL8
436
437 static const StencilFormat
438 // internal Format stencil bits total bits packed?
439 gS8 = {GR_GL_STENCIL_INDEX8, 8, 8, false},
440 gS16 = {GR_GL_STENCIL_INDEX16, 16, 16, false},
441 gD24S8 = {GR_GL_DEPTH24_STENCIL8, 8, 32, true },
442 gS4 = {GR_GL_STENCIL_INDEX4, 4, 4, false},
caryclark@google.comcf6285b2012-06-06 12:09:01 +0000443 // gS = {GR_GL_STENCIL_INDEX, kUnknownBitCount, kUnknownBitCount, false},
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000444 gDS = {GR_GL_DEPTH_STENCIL, kUnknownBitCount, kUnknownBitCount, true };
445
446 if (kDesktop_GrGLBinding == ctxInfo.binding()) {
447 bool supportsPackedDS =
rmistry@google.comfbfcd562012-08-23 18:09:54 +0000448 ctxInfo.version() >= GR_GL_VER(3,0) ||
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000449 ctxInfo.hasExtension("GL_EXT_packed_depth_stencil") ||
450 ctxInfo.hasExtension("GL_ARB_framebuffer_object");
451
452 // S1 thru S16 formats are in GL 3.0+, EXT_FBO, and ARB_FBO since we
453 // require FBO support we can expect these are legal formats and don't
454 // check. These also all support the unsized GL_STENCIL_INDEX.
455 fStencilFormats.push_back() = gS8;
456 fStencilFormats.push_back() = gS16;
457 if (supportsPackedDS) {
458 fStencilFormats.push_back() = gD24S8;
459 }
460 fStencilFormats.push_back() = gS4;
461 if (supportsPackedDS) {
462 fStencilFormats.push_back() = gDS;
463 }
464 } else {
465 // ES2 has STENCIL_INDEX8 without extensions but requires extensions
466 // for other formats.
467 // ES doesn't support using the unsized format.
468
469 fStencilFormats.push_back() = gS8;
470 //fStencilFormats.push_back() = gS16;
471 if (ctxInfo.hasExtension("GL_OES_packed_depth_stencil")) {
472 fStencilFormats.push_back() = gD24S8;
473 }
474 if (ctxInfo.hasExtension("GL_OES_stencil4")) {
475 fStencilFormats.push_back() = gS4;
476 }
477 }
478 GrAssert(0 == fStencilVerifiedColorConfigs.count());
479 fStencilVerifiedColorConfigs.push_back_n(fStencilFormats.count());
480}
481
482void GrGLCaps::markColorConfigAndStencilFormatAsVerified(
483 GrPixelConfig config,
484 const GrGLStencilBuffer::Format& format) {
485#if !GR_GL_CHECK_FBO_STATUS_ONCE_PER_FORMAT
486 return;
487#endif
bsalomon@google.comb6b72e52013-03-28 15:11:14 +0000488 GrAssert((unsigned)config < (unsigned)kGrPixelConfigCnt);
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000489 GrAssert(fStencilFormats.count() == fStencilVerifiedColorConfigs.count());
490 int count = fStencilFormats.count();
491 // we expect a really small number of possible formats so linear search
492 // should be OK
493 GrAssert(count < 16);
494 for (int i = 0; i < count; ++i) {
495 if (format.fInternalFormat ==
496 fStencilFormats[i].fInternalFormat) {
497 fStencilVerifiedColorConfigs[i].markVerified(config);
498 return;
499 }
500 }
501 GrCrash("Why are we seeing a stencil format that "
502 "GrGLCaps doesn't know about.");
503}
504
505bool GrGLCaps::isColorConfigAndStencilFormatVerified(
506 GrPixelConfig config,
507 const GrGLStencilBuffer::Format& format) const {
508#if !GR_GL_CHECK_FBO_STATUS_ONCE_PER_FORMAT
509 return false;
510#endif
bsalomon@google.comb6b72e52013-03-28 15:11:14 +0000511 GrAssert((unsigned)config < (unsigned)kGrPixelConfigCnt);
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000512 int count = fStencilFormats.count();
513 // we expect a really small number of possible formats so linear search
514 // should be OK
515 GrAssert(count < 16);
516 for (int i = 0; i < count; ++i) {
517 if (format.fInternalFormat ==
518 fStencilFormats[i].fInternalFormat) {
519 return fStencilVerifiedColorConfigs[i].isVerified(config);
520 }
521 }
522 GrCrash("Why are we seeing a stencil format that "
523 "GLCaps doesn't know about.");
524 return false;
525}
526
527void GrGLCaps::print() const {
bsalomon@google.combcce8922013-03-25 15:38:39 +0000528
529 INHERITED::print();
530
531 GrPrintf("--- GL-Specific ---\n");
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000532 for (int i = 0; i < fStencilFormats.count(); ++i) {
533 GrPrintf("Stencil Format %d, stencil bits: %02d, total bits: %02d\n",
534 i,
535 fStencilFormats[i].fStencilBits,
536 fStencilFormats[i].fTotalBits);
537 }
538
bsalomon@google.com6b0cf022013-05-03 13:35:14 +0000539 static const char* kMSFBOExtStr[] = {
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000540 "None",
541 "ARB",
542 "EXT",
543 "Apple",
bsalomon@google.com347c3822013-05-01 20:10:01 +0000544 "IMG MS To Texture",
545 "EXT MS To Texture",
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000546 };
bsalomon@google.com6b0cf022013-05-03 13:35:14 +0000547 GR_STATIC_ASSERT(0 == kNone_MSFBOType);
548 GR_STATIC_ASSERT(1 == kDesktop_ARB_MSFBOType);
549 GR_STATIC_ASSERT(2 == kDesktop_EXT_MSFBOType);
550 GR_STATIC_ASSERT(3 == kES_Apple_MSFBOType);
551 GR_STATIC_ASSERT(4 == kES_IMG_MsToTexture_MSFBOType);
552 GR_STATIC_ASSERT(5 == kES_EXT_MsToTexture_MSFBOType);
553 GR_STATIC_ASSERT(GR_ARRAY_COUNT(kMSFBOExtStr) == kLast_MSFBOType + 1);
554
555 static const char* kFBFetchTypeStr[] = {
556 "None",
557 "EXT",
558 "NV",
559 };
560 GR_STATIC_ASSERT(0 == kNone_FBFetchType);
561 GR_STATIC_ASSERT(1 == kEXT_FBFetchType);
562 GR_STATIC_ASSERT(2 == kNV_FBFetchType);
563 GR_STATIC_ASSERT(GR_ARRAY_COUNT(kFBFetchTypeStr) == kLast_FBFetchType + 1);
564
565
566 GrPrintf("MSAA Type: %s\n", kMSFBOExtStr[fMSFBOType]);
567 GrPrintf("FB Fetch Type: %s\n", kFBFetchTypeStr[fFBFetchType]);
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000568 GrPrintf("Max FS Uniform Vectors: %d\n", fMaxFragmentUniformVectors);
bsalomon@google.combcce8922013-03-25 15:38:39 +0000569 GrPrintf("Max Vertex Attributes: %d\n", fMaxVertexAttributes);
570 GrPrintf("Support RGBA8 Render Buffer: %s\n", (fRGBA8RenderbufferSupport ? "YES": "NO"));
571 GrPrintf("BGRA support: %s\n", (fBGRAFormatSupport ? "YES": "NO"));
572 GrPrintf("BGRA is an internal format: %s\n", (fBGRAIsInternalFormat ? "YES": "NO"));
573 GrPrintf("Support texture swizzle: %s\n", (fTextureSwizzleSupport ? "YES": "NO"));
574 GrPrintf("Unpack Row length support: %s\n", (fUnpackRowLengthSupport ? "YES": "NO"));
575 GrPrintf("Unpack Flip Y support: %s\n", (fUnpackFlipYSupport ? "YES": "NO"));
576 GrPrintf("Pack Row length support: %s\n", (fPackRowLengthSupport ? "YES": "NO"));
577 GrPrintf("Pack Flip Y support: %s\n", (fPackFlipYSupport ? "YES": "NO"));
578
579 GrPrintf("Texture Usage support: %s\n", (fTextureUsageSupport ? "YES": "NO"));
580 GrPrintf("Texture Storage support: %s\n", (fTexStorageSupport ? "YES": "NO"));
581 GrPrintf("GL_R support: %s\n", (fTextureRedSupport ? "YES": "NO"));
582 GrPrintf("GL_ARB_imaging support: %s\n", (fImagingSupport ? "YES": "NO"));
robertphillips@google.com1d89c932012-06-27 19:31:41 +0000583 GrPrintf("Two Format Limit: %s\n", (fTwoFormatLimit ? "YES": "NO"));
bsalomon@google.combcce8922013-03-25 15:38:39 +0000584 GrPrintf("Fragment coord conventions support: %s\n",
585 (fFragCoordsConventionSupport ? "YES": "NO"));
586 GrPrintf("Vertex array object support: %s\n", (fVertexArrayObjectSupport ? "YES": "NO"));
587 GrPrintf("Use non-VBO for dynamic data: %s\n",
588 (fUseNonVBOVertexAndIndexDynamicData ? "YES" : "NO"));
589 GrPrintf("Core Profile: %s\n", (fIsCoreProfile ? "YES" : "NO"));
robertphillips@google.coma6ffb582013-04-29 16:50:17 +0000590 GrPrintf("Discard FrameBuffer support: %s\n", (fDiscardFBSupport ? "YES" : "NO"));
bsalomon@google.comf7fa8062012-02-14 14:09:57 +0000591}