| /* |
| * Copyright 2012 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| #include "GrGLCaps.h" |
| #include "GrGLContextInfo.h" |
| #include "SkTSearch.h" |
| |
| GrGLCaps::GrGLCaps() { |
| this->reset(); |
| } |
| |
| void GrGLCaps::reset() { |
| fVerifiedColorConfigs.reset(); |
| fStencilFormats.reset(); |
| fStencilVerifiedColorConfigs.reset(); |
| fMSFBOType = kNone_MSFBOType; |
| fMaxSampleCount = 0; |
| fCoverageAAType = kNone_CoverageAAType; |
| fMaxFragmentUniformVectors = 0; |
| fMaxVertexAttributes = 0; |
| fRGBA8RenderbufferSupport = false; |
| fBGRAFormatSupport = false; |
| fBGRAIsInternalFormat = false; |
| fTextureSwizzleSupport = false; |
| fUnpackRowLengthSupport = false; |
| fUnpackFlipYSupport = false; |
| fPackRowLengthSupport = false; |
| fPackFlipYSupport = false; |
| fTextureUsageSupport = false; |
| fTexStorageSupport = false; |
| fTextureRedSupport = false; |
| fImagingSupport = false; |
| fTwoFormatLimit = false; |
| fFragCoordsConventionSupport = false; |
| } |
| |
| GrGLCaps::GrGLCaps(const GrGLCaps& caps) { |
| *this = caps; |
| } |
| |
| GrGLCaps& GrGLCaps::operator = (const GrGLCaps& caps) { |
| fVerifiedColorConfigs = caps.fVerifiedColorConfigs; |
| fStencilFormats = caps.fStencilFormats; |
| fStencilVerifiedColorConfigs = caps.fStencilVerifiedColorConfigs; |
| fMaxFragmentUniformVectors = caps.fMaxFragmentUniformVectors; |
| fMaxVertexAttributes = caps.fMaxVertexAttributes; |
| fMSFBOType = caps.fMSFBOType; |
| fMaxSampleCount = caps.fMaxSampleCount; |
| fCoverageAAType = caps.fCoverageAAType; |
| fMSAACoverageModes = caps.fMSAACoverageModes; |
| fRGBA8RenderbufferSupport = caps.fRGBA8RenderbufferSupport; |
| fBGRAFormatSupport = caps.fBGRAFormatSupport; |
| fBGRAIsInternalFormat = caps.fBGRAIsInternalFormat; |
| fTextureSwizzleSupport = caps.fTextureSwizzleSupport; |
| fUnpackRowLengthSupport = caps.fUnpackRowLengthSupport; |
| fUnpackFlipYSupport = caps.fUnpackFlipYSupport; |
| fPackRowLengthSupport = caps.fPackRowLengthSupport; |
| fPackFlipYSupport = caps.fPackFlipYSupport; |
| fTextureUsageSupport = caps.fTextureUsageSupport; |
| fTexStorageSupport = caps.fTexStorageSupport; |
| fTextureRedSupport = caps.fTextureRedSupport; |
| fImagingSupport = caps.fImagingSupport; |
| fTwoFormatLimit = caps.fTwoFormatLimit; |
| fFragCoordsConventionSupport = caps.fFragCoordsConventionSupport; |
| |
| return *this; |
| } |
| |
| void GrGLCaps::init(const GrGLContextInfo& ctxInfo) { |
| |
| this->reset(); |
| if (!ctxInfo.isInitialized()) { |
| return; |
| } |
| |
| const GrGLInterface* gli = ctxInfo.interface(); |
| GrGLBinding binding = ctxInfo.binding(); |
| GrGLVersion version = ctxInfo.version(); |
| |
| if (kES2_GrGLBinding == binding) { |
| GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_VECTORS, |
| &fMaxFragmentUniformVectors); |
| } else { |
| GrAssert(kDesktop_GrGLBinding == binding); |
| GrGLint max; |
| GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, &max); |
| fMaxFragmentUniformVectors = max / 4; |
| } |
| GR_GL_GetIntegerv(gli, GR_GL_MAX_VERTEX_ATTRIBS, &fMaxVertexAttributes); |
| |
| if (kDesktop_GrGLBinding == binding) { |
| fRGBA8RenderbufferSupport = true; |
| } else { |
| fRGBA8RenderbufferSupport = ctxInfo.hasExtension("GL_OES_rgb8_rgba8") || |
| ctxInfo.hasExtension("GL_ARM_rgba8"); |
| } |
| |
| if (kDesktop_GrGLBinding == binding) { |
| fBGRAFormatSupport = version >= GR_GL_VER(1,2) || |
| ctxInfo.hasExtension("GL_EXT_bgra"); |
| } else { |
| if (ctxInfo.hasExtension("GL_APPLE_texture_format_BGRA8888")) { |
| fBGRAFormatSupport = true; |
| } else if (ctxInfo.hasExtension("GL_EXT_texture_format_BGRA8888")) { |
| fBGRAFormatSupport = true; |
| fBGRAIsInternalFormat = true; |
| } |
| GrAssert(fBGRAFormatSupport || |
| kSkia8888_GrPixelConfig != kBGRA_8888_GrPixelConfig); |
| } |
| |
| if (kDesktop_GrGLBinding == binding) { |
| fTextureSwizzleSupport = version >= GR_GL_VER(3,3) || |
| ctxInfo.hasExtension("GL_ARB_texture_swizzle"); |
| } else { |
| fTextureSwizzleSupport = false; |
| } |
| |
| if (kDesktop_GrGLBinding == binding) { |
| fUnpackRowLengthSupport = true; |
| fUnpackFlipYSupport = false; |
| fPackRowLengthSupport = true; |
| fPackFlipYSupport = false; |
| } else { |
| fUnpackRowLengthSupport =ctxInfo.hasExtension("GL_EXT_unpack_subimage"); |
| fUnpackFlipYSupport = ctxInfo.hasExtension("GL_CHROMIUM_flipy"); |
| // no extension for pack row length |
| fPackRowLengthSupport = false; |
| fPackFlipYSupport = |
| ctxInfo.hasExtension("GL_ANGLE_pack_reverse_row_order"); |
| } |
| |
| fTextureUsageSupport = (kES2_GrGLBinding == binding) && |
| ctxInfo.hasExtension("GL_ANGLE_texture_usage"); |
| |
| // Tex storage is in desktop 4.2 and can be an extension to desktop or ES. |
| fTexStorageSupport = (kDesktop_GrGLBinding == binding && |
| version >= GR_GL_VER(4,2)) || |
| ctxInfo.hasExtension("GL_ARB_texture_storage") || |
| ctxInfo.hasExtension("GL_EXT_texture_storage"); |
| |
| // ARB_texture_rg is part of OpenGL 3.0 |
| if (kDesktop_GrGLBinding == binding) { |
| fTextureRedSupport = version >= GR_GL_VER(3,0) || |
| ctxInfo.hasExtension("GL_ARB_texture_rg"); |
| } else { |
| fTextureRedSupport = ctxInfo.hasExtension("GL_EXT_texture_rg"); |
| } |
| |
| fImagingSupport = kDesktop_GrGLBinding == binding && |
| ctxInfo.hasExtension("GL_ARB_imaging"); |
| |
| // ES 2 only guarantees RGBA/uchar + one other format/type combo for |
| // ReadPixels. The other format has to checked at run-time since it |
| // can change based on which render target is bound |
| fTwoFormatLimit = kES2_GrGLBinding == binding; |
| |
| // Known issue on at least some Intel platforms: |
| // http://code.google.com/p/skia/issues/detail?id=946 |
| if (kIntel_GrGLVendor != ctxInfo.vendor()) { |
| fFragCoordsConventionSupport = ctxInfo.glslGeneration() >= k150_GrGLSLGeneration || |
| ctxInfo.hasExtension("GL_ARB_fragment_coord_conventions"); |
| } |
| |
| this->initFSAASupport(ctxInfo); |
| this->initStencilFormats(ctxInfo); |
| } |
| |
| bool GrGLCaps::readPixelsSupported(const GrGLInterface* intf, |
| GrGLenum format, |
| GrGLenum type) const { |
| if (GR_GL_RGBA == format && GR_GL_UNSIGNED_BYTE == type) { |
| // ES 2 guarantees this format is supported |
| return true; |
| } |
| |
| if (!fTwoFormatLimit) { |
| // not limited by ES 2's constraints |
| return true; |
| } |
| |
| GrGLint otherFormat = GR_GL_RGBA; |
| GrGLint otherType = GR_GL_UNSIGNED_BYTE; |
| |
| // The other supported format/type combo supported for ReadPixels |
| // can change based on which render target is bound |
| GR_GL_GetIntegerv(intf, |
| GR_GL_IMPLEMENTATION_COLOR_READ_FORMAT, |
| &otherFormat); |
| |
| GR_GL_GetIntegerv(intf, |
| GR_GL_IMPLEMENTATION_COLOR_READ_TYPE, |
| &otherType); |
| |
| return (GrGLenum)otherFormat == format && (GrGLenum)otherType == type; |
| } |
| |
| namespace { |
| int coverage_mode_compare(const GrGLCaps::MSAACoverageMode* left, |
| const GrGLCaps::MSAACoverageMode* right) { |
| if (left->fCoverageSampleCnt < right->fCoverageSampleCnt) { |
| return -1; |
| } else if (right->fCoverageSampleCnt < left->fCoverageSampleCnt) { |
| return 1; |
| } else if (left->fColorSampleCnt < right->fColorSampleCnt) { |
| return -1; |
| } else if (right->fColorSampleCnt < left->fColorSampleCnt) { |
| return 1; |
| } |
| return 0; |
| } |
| } |
| |
| void GrGLCaps::initFSAASupport(const GrGLContextInfo& ctxInfo) { |
| |
| fMSFBOType = kNone_MSFBOType; |
| if (kDesktop_GrGLBinding != ctxInfo.binding()) { |
| if (ctxInfo.hasExtension("GL_CHROMIUM_framebuffer_multisample")) { |
| // chrome's extension is equivalent to the EXT msaa |
| // and fbo_blit extensions. |
| fMSFBOType = kDesktopEXT_MSFBOType; |
| } else if (ctxInfo.hasExtension("GL_APPLE_framebuffer_multisample")) { |
| fMSFBOType = kAppleES_MSFBOType; |
| } |
| } else { |
| if ((ctxInfo.version() >= GR_GL_VER(3,0)) || |
| ctxInfo.hasExtension("GL_ARB_framebuffer_object")) { |
| fMSFBOType = GrGLCaps::kDesktopARB_MSFBOType; |
| } else if (ctxInfo.hasExtension("GL_EXT_framebuffer_multisample") && |
| ctxInfo.hasExtension("GL_EXT_framebuffer_blit")) { |
| fMSFBOType = GrGLCaps::kDesktopEXT_MSFBOType; |
| } |
| // TODO: We could populate fMSAACoverageModes using GetInternalformativ |
| // on GL 4.2+. It's format-specific, though. See also |
| // http://code.google.com/p/skia/issues/detail?id=470 about using actual |
| // rather than requested sample counts in cache key. |
| if (ctxInfo.hasExtension("GL_NV_framebuffer_multisample_coverage")) { |
| fCoverageAAType = kNVDesktop_CoverageAAType; |
| GrGLint count; |
| GR_GL_GetIntegerv(ctxInfo.interface(), |
| GR_GL_MAX_MULTISAMPLE_COVERAGE_MODES, |
| &count); |
| fMSAACoverageModes.setCount(count); |
| GR_GL_GetIntegerv(ctxInfo.interface(), |
| GR_GL_MULTISAMPLE_COVERAGE_MODES, |
| (int*)&fMSAACoverageModes[0]); |
| // The NV driver seems to return the modes already sorted but the |
| // spec doesn't require this. So we sort. |
| qsort(&fMSAACoverageModes[0], |
| count, |
| sizeof(MSAACoverageMode), |
| SkCastForQSort(coverage_mode_compare)); |
| } |
| } |
| if (kNone_MSFBOType != fMSFBOType) { |
| GR_GL_GetIntegerv(ctxInfo.interface(), |
| GR_GL_MAX_SAMPLES, |
| &fMaxSampleCount); |
| } |
| } |
| |
| const GrGLCaps::MSAACoverageMode& GrGLCaps::getMSAACoverageMode( |
| int desiredSampleCount) const { |
| static const MSAACoverageMode kNoneMode = {0, 0}; |
| if (0 == fMSAACoverageModes.count()) { |
| return kNoneMode; |
| } else { |
| GrAssert(kNone_CoverageAAType != fCoverageAAType); |
| int max = (fMSAACoverageModes.end() - 1)->fCoverageSampleCnt; |
| desiredSampleCount = GrMin(desiredSampleCount, max); |
| MSAACoverageMode desiredMode = {desiredSampleCount, 0}; |
| int idx = SkTSearch<MSAACoverageMode>(&fMSAACoverageModes[0], |
| fMSAACoverageModes.count(), |
| desiredMode, |
| sizeof(MSAACoverageMode), |
| &coverage_mode_compare); |
| if (idx < 0) { |
| idx = ~idx; |
| } |
| GrAssert(idx >= 0 && idx < fMSAACoverageModes.count()); |
| return fMSAACoverageModes[idx]; |
| } |
| } |
| |
| namespace { |
| const GrGLuint kUnknownBitCount = GrGLStencilBuffer::kUnknownBitCount; |
| } |
| |
| void GrGLCaps::initStencilFormats(const GrGLContextInfo& ctxInfo) { |
| |
| // Build up list of legal stencil formats (though perhaps not supported on |
| // the particular gpu/driver) from most preferred to least. |
| |
| // these consts are in order of most preferred to least preferred |
| // we don't bother with GL_STENCIL_INDEX1 or GL_DEPTH32F_STENCIL8 |
| |
| static const StencilFormat |
| // internal Format stencil bits total bits packed? |
| gS8 = {GR_GL_STENCIL_INDEX8, 8, 8, false}, |
| gS16 = {GR_GL_STENCIL_INDEX16, 16, 16, false}, |
| gD24S8 = {GR_GL_DEPTH24_STENCIL8, 8, 32, true }, |
| gS4 = {GR_GL_STENCIL_INDEX4, 4, 4, false}, |
| // gS = {GR_GL_STENCIL_INDEX, kUnknownBitCount, kUnknownBitCount, false}, |
| gDS = {GR_GL_DEPTH_STENCIL, kUnknownBitCount, kUnknownBitCount, true }; |
| |
| if (kDesktop_GrGLBinding == ctxInfo.binding()) { |
| bool supportsPackedDS = |
| ctxInfo.version() >= GR_GL_VER(3,0) || |
| ctxInfo.hasExtension("GL_EXT_packed_depth_stencil") || |
| ctxInfo.hasExtension("GL_ARB_framebuffer_object"); |
| |
| // S1 thru S16 formats are in GL 3.0+, EXT_FBO, and ARB_FBO since we |
| // require FBO support we can expect these are legal formats and don't |
| // check. These also all support the unsized GL_STENCIL_INDEX. |
| fStencilFormats.push_back() = gS8; |
| fStencilFormats.push_back() = gS16; |
| if (supportsPackedDS) { |
| fStencilFormats.push_back() = gD24S8; |
| } |
| fStencilFormats.push_back() = gS4; |
| if (supportsPackedDS) { |
| fStencilFormats.push_back() = gDS; |
| } |
| } else { |
| // ES2 has STENCIL_INDEX8 without extensions but requires extensions |
| // for other formats. |
| // ES doesn't support using the unsized format. |
| |
| fStencilFormats.push_back() = gS8; |
| //fStencilFormats.push_back() = gS16; |
| if (ctxInfo.hasExtension("GL_OES_packed_depth_stencil")) { |
| fStencilFormats.push_back() = gD24S8; |
| } |
| if (ctxInfo.hasExtension("GL_OES_stencil4")) { |
| fStencilFormats.push_back() = gS4; |
| } |
| } |
| GrAssert(0 == fStencilVerifiedColorConfigs.count()); |
| fStencilVerifiedColorConfigs.push_back_n(fStencilFormats.count()); |
| } |
| |
| void GrGLCaps::markColorConfigAndStencilFormatAsVerified( |
| GrPixelConfig config, |
| const GrGLStencilBuffer::Format& format) { |
| #if !GR_GL_CHECK_FBO_STATUS_ONCE_PER_FORMAT |
| return; |
| #endif |
| GrAssert((unsigned)config < kGrPixelConfigCount); |
| GrAssert(fStencilFormats.count() == fStencilVerifiedColorConfigs.count()); |
| int count = fStencilFormats.count(); |
| // we expect a really small number of possible formats so linear search |
| // should be OK |
| GrAssert(count < 16); |
| for (int i = 0; i < count; ++i) { |
| if (format.fInternalFormat == |
| fStencilFormats[i].fInternalFormat) { |
| fStencilVerifiedColorConfigs[i].markVerified(config); |
| return; |
| } |
| } |
| GrCrash("Why are we seeing a stencil format that " |
| "GrGLCaps doesn't know about."); |
| } |
| |
| bool GrGLCaps::isColorConfigAndStencilFormatVerified( |
| GrPixelConfig config, |
| const GrGLStencilBuffer::Format& format) const { |
| #if !GR_GL_CHECK_FBO_STATUS_ONCE_PER_FORMAT |
| return false; |
| #endif |
| GrAssert((unsigned)config < kGrPixelConfigCount); |
| int count = fStencilFormats.count(); |
| // we expect a really small number of possible formats so linear search |
| // should be OK |
| GrAssert(count < 16); |
| for (int i = 0; i < count; ++i) { |
| if (format.fInternalFormat == |
| fStencilFormats[i].fInternalFormat) { |
| return fStencilVerifiedColorConfigs[i].isVerified(config); |
| } |
| } |
| GrCrash("Why are we seeing a stencil format that " |
| "GLCaps doesn't know about."); |
| return false; |
| } |
| |
| void GrGLCaps::print() const { |
| for (int i = 0; i < fStencilFormats.count(); ++i) { |
| GrPrintf("Stencil Format %d, stencil bits: %02d, total bits: %02d\n", |
| i, |
| fStencilFormats[i].fStencilBits, |
| fStencilFormats[i].fTotalBits); |
| } |
| |
| GR_STATIC_ASSERT(0 == kNone_MSFBOType); |
| GR_STATIC_ASSERT(1 == kDesktopARB_MSFBOType); |
| GR_STATIC_ASSERT(2 == kDesktopEXT_MSFBOType); |
| GR_STATIC_ASSERT(3 == kAppleES_MSFBOType); |
| static const char* gMSFBOExtStr[] = { |
| "None", |
| "ARB", |
| "EXT", |
| "Apple", |
| }; |
| GrPrintf("MSAA Type: %s\n", gMSFBOExtStr[fMSFBOType]); |
| GrPrintf("Max FS Uniform Vectors: %d\n", fMaxFragmentUniformVectors); |
| GrPrintf("Support RGBA8 Render Buffer: %s\n", |
| (fRGBA8RenderbufferSupport ? "YES": "NO")); |
| GrPrintf("BGRA is an internal format: %s\n", |
| (fBGRAIsInternalFormat ? "YES": "NO")); |
| GrPrintf("Support texture swizzle: %s\n", |
| (fTextureSwizzleSupport ? "YES": "NO")); |
| GrPrintf("Unpack Row length support: %s\n", |
| (fUnpackRowLengthSupport ? "YES": "NO")); |
| GrPrintf("Unpack Flip Y support: %s\n", |
| (fUnpackFlipYSupport ? "YES": "NO")); |
| GrPrintf("Pack Row length support: %s\n", |
| (fPackRowLengthSupport ? "YES": "NO")); |
| GrPrintf("Pack Flip Y support: %s\n", |
| (fPackFlipYSupport ? "YES": "NO")); |
| GrPrintf("Two Format Limit: %s\n", (fTwoFormatLimit ? "YES": "NO")); |
| GrPrintf("Fragment coord conventions support: %s\n", (fFragCoordsConventionSupport ? "YES": "NO")); |
| } |
