/* * 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 "GrContextOptions.h" #include "GrGLContext.h" #include "GrGLRenderTarget.h" #include "GrGLTexture.h" #include "GrShaderCaps.h" #include "GrSurfaceProxyPriv.h" #include "SkJSONWriter.h" #include "SkTSearch.h" #include "SkTSort.h" GrGLCaps::GrGLCaps(const GrContextOptions& contextOptions, const GrGLContextInfo& ctxInfo, const GrGLInterface* glInterface) : INHERITED(contextOptions) { fStandard = ctxInfo.standard(); fStencilFormats.reset(); fMSFBOType = kNone_MSFBOType; fInvalidateFBType = kNone_InvalidateFBType; fMapBufferType = kNone_MapBufferType; fTransferBufferType = kNone_TransferBufferType; fMaxFragmentUniformVectors = 0; fUnpackRowLengthSupport = false; fUnpackFlipYSupport = false; fPackRowLengthSupport = false; fPackFlipYSupport = false; fTextureUsageSupport = false; fAlpha8IsRenderable = false; fImagingSupport = false; fVertexArrayObjectSupport = false; fDebugSupport = false; fES2CompatibilitySupport = false; fDrawIndirectSupport = false; fMultiDrawIndirectSupport = false; fBaseInstanceSupport = false; fIsCoreProfile = false; fBindFragDataLocationSupport = false; fRectangleTextureSupport = false; fTextureSwizzleSupport = false; fRGBA8888PixelsOpsAreSlow = false; fPartialFBOReadIsSlow = false; fMipMapLevelAndLodControlSupport = false; fRGBAToBGRAReadbackConversionsAreSlow = false; fUseBufferDataNullHint = SkToBool(GR_GL_USE_BUFFER_DATA_NULL_HINT); fDoManualMipmapping = false; fSRGBDecodeDisableAffectsMipmaps = false; fClearToBoundaryValuesIsBroken = false; fClearTextureSupport = false; fDrawArraysBaseVertexIsBroken = false; fUseDrawToClearColor = false; fUseDrawToClearStencilClip = false; fDisallowTexSubImageForUnormConfigTexturesEverBoundToFBO = false; fUseDrawInsteadOfAllRenderTargetWrites = false; fRequiresCullFaceEnableDisableWhenDrawingLinesAfterNonLines = false; fProgramBinarySupport = false; fBlitFramebufferFlags = kNoSupport_BlitFramebufferFlag; fMaxInstancesPerDrawArraysWithoutCrashing = 0; fShaderCaps.reset(new GrShaderCaps(contextOptions)); this->init(contextOptions, ctxInfo, glInterface); } void GrGLCaps::init(const GrContextOptions& contextOptions, const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) { GrGLStandard standard = ctxInfo.standard(); GrGLVersion version = ctxInfo.version(); if (kGLES_GrGLStandard == standard) { GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_VECTORS, &fMaxFragmentUniformVectors); } else { SkASSERT(kGL_GrGLStandard == standard); GrGLint max; GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, &max); fMaxFragmentUniformVectors = max / 4; if (version >= GR_GL_VER(3, 2)) { GrGLint profileMask; GR_GL_GetIntegerv(gli, GR_GL_CONTEXT_PROFILE_MASK, &profileMask); fIsCoreProfile = SkToBool(profileMask & GR_GL_CONTEXT_CORE_PROFILE_BIT); } } GR_GL_GetIntegerv(gli, GR_GL_MAX_VERTEX_ATTRIBS, &fMaxVertexAttributes); if (kGL_GrGLStandard == standard) { fUnpackRowLengthSupport = true; fUnpackFlipYSupport = false; fPackRowLengthSupport = true; fPackFlipYSupport = false; } else { fUnpackRowLengthSupport = version >= GR_GL_VER(3,0) || ctxInfo.hasExtension("GL_EXT_unpack_subimage"); fUnpackFlipYSupport = ctxInfo.hasExtension("GL_CHROMIUM_flipy"); fPackRowLengthSupport = version >= GR_GL_VER(3,0) || ctxInfo.hasExtension("GL_NV_pack_subimage"); fPackFlipYSupport = ctxInfo.hasExtension("GL_ANGLE_pack_reverse_row_order"); } fTextureUsageSupport = (kGLES_GrGLStandard == standard) && ctxInfo.hasExtension("GL_ANGLE_texture_usage"); if (kGL_GrGLStandard == standard) { fTextureBarrierSupport = version >= GR_GL_VER(4,5) || ctxInfo.hasExtension("GL_ARB_texture_barrier") || ctxInfo.hasExtension("GL_NV_texture_barrier"); } else { fTextureBarrierSupport = ctxInfo.hasExtension("GL_NV_texture_barrier"); } if (kGL_GrGLStandard == standard) { fSampleLocationsSupport = version >= GR_GL_VER(3,2) || ctxInfo.hasExtension("GL_ARB_texture_multisample"); } else { fSampleLocationsSupport = version >= GR_GL_VER(3,1); } fImagingSupport = kGL_GrGLStandard == standard && ctxInfo.hasExtension("GL_ARB_imaging"); if (((kGL_GrGLStandard == standard && version >= GR_GL_VER(4,3)) || (kGLES_GrGLStandard == standard && version >= GR_GL_VER(3,0)) || ctxInfo.hasExtension("GL_ARB_invalidate_subdata"))) { fDiscardRenderTargetSupport = true; fInvalidateFBType = kInvalidate_InvalidateFBType; } else if (ctxInfo.hasExtension("GL_EXT_discard_framebuffer")) { fDiscardRenderTargetSupport = true; fInvalidateFBType = kDiscard_InvalidateFBType; } // For future reference on Desktop GL, GL_PRIMITIVE_RESTART_FIXED_INDEX appears in 4.3, and // GL_PRIMITIVE_RESTART (where the client must call glPrimitiveRestartIndex) appears in 3.1. if (kGLES_GrGLStandard == standard) { // Primitive restart can cause a 3x slowdown on Adreno. Enable conservatively. // TODO: Evaluate on PowerVR. // FIXME: Primitive restart would likely be a win on iOS if we had an enum value for it. if (kARM_GrGLVendor == ctxInfo.vendor()) { fUsePrimitiveRestart = version >= GR_GL_VER(3,0); } } if (kARM_GrGLVendor == ctxInfo.vendor() || kImagination_GrGLVendor == ctxInfo.vendor() || kQualcomm_GrGLVendor == ctxInfo.vendor() ) { fPreferFullscreenClears = true; } if (kGL_GrGLStandard == standard) { fVertexArrayObjectSupport = version >= GR_GL_VER(3, 0) || ctxInfo.hasExtension("GL_ARB_vertex_array_object") || ctxInfo.hasExtension("GL_APPLE_vertex_array_object"); } else { fVertexArrayObjectSupport = version >= GR_GL_VER(3, 0) || ctxInfo.hasExtension("GL_OES_vertex_array_object"); } if (kGL_GrGLStandard == standard && version >= GR_GL_VER(4,3)) { fDebugSupport = true; } else { fDebugSupport = ctxInfo.hasExtension("GL_KHR_debug"); } if (kGL_GrGLStandard == standard) { fES2CompatibilitySupport = ctxInfo.hasExtension("GL_ARB_ES2_compatibility"); } else { fES2CompatibilitySupport = true; } if (kGL_GrGLStandard == standard) { fMultisampleDisableSupport = true; } else { fMultisampleDisableSupport = ctxInfo.hasExtension("GL_EXT_multisample_compatibility"); } if (kGL_GrGLStandard == standard) { // 3.1 has draw_instanced but not instanced_arrays, for the time being we only care about // instanced arrays, but we could make this more granular if we wanted fInstanceAttribSupport = version >= GR_GL_VER(3, 2) || (ctxInfo.hasExtension("GL_ARB_draw_instanced") && ctxInfo.hasExtension("GL_ARB_instanced_arrays")); } else { fInstanceAttribSupport = version >= GR_GL_VER(3, 0) || (ctxInfo.hasExtension("GL_EXT_draw_instanced") && ctxInfo.hasExtension("GL_EXT_instanced_arrays")); } if (kGL_GrGLStandard == standard) { if (version >= GR_GL_VER(3, 0)) { fBindFragDataLocationSupport = true; } } else { if (version >= GR_GL_VER(3, 0) && ctxInfo.hasExtension("GL_EXT_blend_func_extended")) { fBindFragDataLocationSupport = true; } } fBindUniformLocationSupport = ctxInfo.hasExtension("GL_CHROMIUM_bind_uniform_location"); if (kGL_GrGLStandard == standard) { if (version >= GR_GL_VER(3, 1) || ctxInfo.hasExtension("GL_ARB_texture_rectangle")) { // We also require textureSize() support for rectangle 2D samplers which was added in // GLSL 1.40. if (ctxInfo.glslGeneration() >= k140_GrGLSLGeneration) { fRectangleTextureSupport = true; } } } else { // Command buffer exposes this in GL ES context for Chromium reasons, // but it should not be used. Also, at the time of writing command buffer // lacks TexImage2D support and ANGLE lacks GL ES 3.0 support. } if (kGL_GrGLStandard == standard) { if (version >= GR_GL_VER(3,3) || ctxInfo.hasExtension("GL_ARB_texture_swizzle")) { fTextureSwizzleSupport = true; } } else { if (version >= GR_GL_VER(3,0)) { fTextureSwizzleSupport = true; } } if (kGL_GrGLStandard == standard) { fMipMapLevelAndLodControlSupport = true; } else if (kGLES_GrGLStandard == standard) { if (version >= GR_GL_VER(3,0)) { fMipMapLevelAndLodControlSupport = true; } } #ifdef SK_BUILD_FOR_WIN // We're assuming that on Windows Chromium we're using ANGLE. bool isANGLE = kANGLE_GrGLDriver == ctxInfo.driver() || kChromium_GrGLDriver == ctxInfo.driver(); // Angle has slow read/write pixel paths for 32bit RGBA (but fast for BGRA). fRGBA8888PixelsOpsAreSlow = isANGLE; // On DX9 ANGLE reading a partial FBO is slow. TODO: Check whether this is still true and // check DX11 ANGLE. fPartialFBOReadIsSlow = isANGLE; #endif bool isMESA = kMesa_GrGLDriver == ctxInfo.driver(); bool isMAC = false; #ifdef SK_BUILD_FOR_MAC isMAC = true; #endif // Both mesa and mac have reduced performance if reading back an RGBA framebuffer as BGRA or // vis-versa. fRGBAToBGRAReadbackConversionsAreSlow = isMESA || isMAC; if (GrContextOptions::Enable::kNo == contextOptions.fUseGLBufferDataNullHint) { fUseBufferDataNullHint = false; } else if (GrContextOptions::Enable::kYes == contextOptions.fUseGLBufferDataNullHint) { fUseBufferDataNullHint = true; } if (kGL_GrGLStandard == standard) { if (version >= GR_GL_VER(4,4) || ctxInfo.hasExtension("GL_ARB_clear_texture")) { fClearTextureSupport = true; } } else if (ctxInfo.hasExtension("GL_EXT_clear_texture")) { fClearTextureSupport = true; } /************************************************************************** * GrShaderCaps fields **************************************************************************/ // This must be called after fCoreProfile is set on the GrGLCaps this->initGLSL(ctxInfo, gli); GrShaderCaps* shaderCaps = fShaderCaps.get(); shaderCaps->fPathRenderingSupport = this->hasPathRenderingSupport(ctxInfo, gli); #if GR_TEST_UTILS if (contextOptions.fSuppressPathRendering) { shaderCaps->fPathRenderingSupport = false; } #endif // Enable supported shader-related caps if (kGL_GrGLStandard == standard) { shaderCaps->fDualSourceBlendingSupport = (ctxInfo.version() >= GR_GL_VER(3, 3) || ctxInfo.hasExtension("GL_ARB_blend_func_extended")) && GrGLSLSupportsNamedFragmentShaderOutputs(ctxInfo.glslGeneration()); shaderCaps->fShaderDerivativeSupport = true; // we don't support GL_ARB_geometry_shader4, just GL 3.2+ GS shaderCaps->fGeometryShaderSupport = ctxInfo.version() >= GR_GL_VER(3, 2) && ctxInfo.glslGeneration() >= k150_GrGLSLGeneration; if (shaderCaps->fGeometryShaderSupport) { if (ctxInfo.glslGeneration() >= k400_GrGLSLGeneration) { shaderCaps->fGSInvocationsSupport = true; } else if (ctxInfo.hasExtension("GL_ARB_gpu_shader5")) { shaderCaps->fGSInvocationsSupport = true; shaderCaps->fGSInvocationsExtensionString = "GL_ARB_gpu_shader5"; } } shaderCaps->fIntegerSupport = ctxInfo.version() >= GR_GL_VER(3, 0) && ctxInfo.glslGeneration() >= k130_GrGLSLGeneration; } else { shaderCaps->fDualSourceBlendingSupport = ctxInfo.hasExtension("GL_EXT_blend_func_extended"); shaderCaps->fShaderDerivativeSupport = ctxInfo.version() >= GR_GL_VER(3, 0) || ctxInfo.hasExtension("GL_OES_standard_derivatives"); // Mali has support for geometry shaders, but in practice with ccpr they are slower than the // backup impl that only uses vertex shaders. if (kARM_GrGLVendor != ctxInfo.vendor()) { if (ctxInfo.version() >= GR_GL_VER(3,2)) { shaderCaps->fGeometryShaderSupport = true; } else if (ctxInfo.hasExtension("GL_EXT_geometry_shader")) { shaderCaps->fGeometryShaderSupport = true; shaderCaps->fGeometryShaderExtensionString = "GL_EXT_geometry_shader"; } shaderCaps->fGSInvocationsSupport = shaderCaps->fGeometryShaderSupport; } shaderCaps->fIntegerSupport = ctxInfo.version() >= GR_GL_VER(3, 0) && ctxInfo.glslGeneration() >= k330_GrGLSLGeneration; // We use this value for GLSL ES 3.0. } // Protect ourselves against tracking huge amounts of texture state. static const uint8_t kMaxSaneSamplers = 32; GrGLint maxSamplers; GR_GL_GetIntegerv(gli, GR_GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS, &maxSamplers); shaderCaps->fMaxVertexSamplers = SkTMin(kMaxSaneSamplers, maxSamplers); if (shaderCaps->fGeometryShaderSupport) { GR_GL_GetIntegerv(gli, GR_GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS, &maxSamplers); shaderCaps->fMaxGeometrySamplers = SkTMin(kMaxSaneSamplers, maxSamplers); } GR_GL_GetIntegerv(gli, GR_GL_MAX_TEXTURE_IMAGE_UNITS, &maxSamplers); shaderCaps->fMaxFragmentSamplers = SkTMin(kMaxSaneSamplers, maxSamplers); GR_GL_GetIntegerv(gli, GR_GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &maxSamplers); shaderCaps->fMaxCombinedSamplers = SkTMin(kMaxSaneSamplers, maxSamplers); // This is all *very* approximate. switch (ctxInfo.vendor()) { case kNVIDIA_GrGLVendor: // We've seen a range from 100 x 100 (TegraK1, GTX660) up to 300 x 300 (GTX 1070) // but it doesn't clearly align with Pascal vs Maxwell vs Kepler. fShaderCaps->fDisableImageMultitexturingDstRectAreaThreshold = 150 * 150; break; case kImagination_GrGLVendor: // Two PowerVR Rogues, Nexus Player and Chromebook Cb5-312T (PowerVR GX6250), show that // it is always a win to use multitexturing. if (kPowerVRRogue_GrGLRenderer == ctxInfo.renderer()) { fShaderCaps->fDisableImageMultitexturingDstRectAreaThreshold = std::numeric_limits::max(); } break; case kATI_GrGLVendor: // So far no AMD GPU shows a performance difference. A tie goes to disabling // multitexturing for simplicity's sake. fShaderCaps->fDisableImageMultitexturingDstRectAreaThreshold = 0; break; default: break; } // SGX and Mali GPUs that are based on a tiled-deferred architecture that have trouble with // frequently changing VBOs. We've measured a performance increase using non-VBO vertex // data for dynamic content on these GPUs. Perhaps we should read the renderer string and // limit this decision to specific GPU families rather than basing it on the vendor alone. if (!GR_GL_MUST_USE_VBO && !fIsCoreProfile && (kARM_GrGLVendor == ctxInfo.vendor() || kImagination_GrGLVendor == ctxInfo.vendor() || kQualcomm_GrGLVendor == ctxInfo.vendor())) { fPreferClientSideDynamicBuffers = true; } if (!contextOptions.fAvoidStencilBuffers) { // To reduce surface area, if we avoid stencil buffers, we also disable MSAA. this->initFSAASupport(contextOptions, ctxInfo, gli); this->initStencilSupport(ctxInfo); } // Setup blit framebuffer if (kGL_GrGLStandard != ctxInfo.standard()) { if (ctxInfo.version() >= GR_GL_VER(3, 0)) { fBlitFramebufferFlags = kNoFormatConversionForMSAASrc_BlitFramebufferFlag | kNoMSAADst_BlitFramebufferFlag | kRectsMustMatchForMSAASrc_BlitFramebufferFlag; } else if (ctxInfo.hasExtension("GL_CHROMIUM_framebuffer_multisample") || ctxInfo.hasExtension("GL_ANGLE_framebuffer_blit")) { // The CHROMIUM extension uses the ANGLE version of glBlitFramebuffer and includes its // limitations. fBlitFramebufferFlags = kNoScalingOrMirroring_BlitFramebufferFlag | kResolveMustBeFull_BlitFrambufferFlag | kNoMSAADst_BlitFramebufferFlag | kNoFormatConversion_BlitFramebufferFlag | kRectsMustMatchForMSAASrc_BlitFramebufferFlag; } } else { if (fUsesMixedSamples || ctxInfo.version() >= GR_GL_VER(3,0) || ctxInfo.hasExtension("GL_ARB_framebuffer_object") || ctxInfo.hasExtension("GL_EXT_framebuffer_blit")) { fBlitFramebufferFlags = 0; } } this->initBlendEqationSupport(ctxInfo); if (kGL_GrGLStandard == standard) { fMapBufferFlags = kCanMap_MapFlag; // we require VBO support and the desktop VBO // extension includes glMapBuffer. if (version >= GR_GL_VER(3, 0) || ctxInfo.hasExtension("GL_ARB_map_buffer_range")) { fMapBufferFlags |= kSubset_MapFlag; fMapBufferType = kMapBufferRange_MapBufferType; } else { fMapBufferType = kMapBuffer_MapBufferType; } } else { // Unextended GLES2 doesn't have any buffer mapping. fMapBufferFlags = kNone_MapBufferType; if (ctxInfo.hasExtension("GL_CHROMIUM_map_sub")) { fMapBufferFlags = kCanMap_MapFlag | kSubset_MapFlag; fMapBufferType = kChromium_MapBufferType; } else if (version >= GR_GL_VER(3, 0) || ctxInfo.hasExtension("GL_EXT_map_buffer_range")) { fMapBufferFlags = kCanMap_MapFlag | kSubset_MapFlag; fMapBufferType = kMapBufferRange_MapBufferType; } else if (ctxInfo.hasExtension("GL_OES_mapbuffer")) { fMapBufferFlags = kCanMap_MapFlag; fMapBufferType = kMapBuffer_MapBufferType; } } if (kGL_GrGLStandard == standard) { if (version >= GR_GL_VER(3, 0) || ctxInfo.hasExtension("GL_ARB_pixel_buffer_object")) { fTransferBufferType = kPBO_TransferBufferType; } } else { if (version >= GR_GL_VER(3, 0) || (ctxInfo.hasExtension("GL_NV_pixel_buffer_object") && // GL_EXT_unpack_subimage needed to support subtexture rectangles ctxInfo.hasExtension("GL_EXT_unpack_subimage"))) { fTransferBufferType = kPBO_TransferBufferType; // TODO: get transfer buffers working in Chrome // } else if (ctxInfo.hasExtension("GL_CHROMIUM_pixel_transfer_buffer_object")) { // fTransferBufferType = kChromium_TransferBufferType; } } // On many GPUs, map memory is very expensive, so we effectively disable it here by setting the // threshold to the maximum unless the client gives us a hint that map memory is cheap. if (fBufferMapThreshold < 0) { #if 0 // We think mapping on Chromium will be cheaper once we know ahead of time how much space // we will use for all GrMeshDrawOps. Right now we might wind up mapping a large buffer and // using a small subset. fBufferMapThreshold = kChromium_GrGLDriver == ctxInfo.driver() ? 0 : SK_MaxS32; #else fBufferMapThreshold = SK_MaxS32; #endif } if (kGL_GrGLStandard == standard) { fNPOTTextureTileSupport = true; fMipMapSupport = true; } else { // Unextended ES2 supports NPOT textures with clamp_to_edge and non-mip filters only // ES3 has no limitations. fNPOTTextureTileSupport = ctxInfo.version() >= GR_GL_VER(3,0) || ctxInfo.hasExtension("GL_OES_texture_npot"); // ES2 supports MIP mapping for POT textures but our caps don't allow for limited MIP // support. The OES extension or ES 3.0 allow for MIPS on NPOT textures. So, apparently, // does the undocumented GL_IMG_texture_npot extension. This extension does not seem to // to alllow arbitrary wrap modes, however. fMipMapSupport = fNPOTTextureTileSupport || ctxInfo.hasExtension("GL_IMG_texture_npot"); } GR_GL_GetIntegerv(gli, GR_GL_MAX_TEXTURE_SIZE, &fMaxTextureSize); GR_GL_GetIntegerv(gli, GR_GL_MAX_RENDERBUFFER_SIZE, &fMaxRenderTargetSize); // Our render targets are always created with textures as the color // attachment, hence this min: fMaxRenderTargetSize = SkTMin(fMaxTextureSize, fMaxRenderTargetSize); fMaxPreferredRenderTargetSize = fMaxRenderTargetSize; if (kARM_GrGLVendor == ctxInfo.vendor()) { // On Mali G71, RT's above 4k have been observed to incur a performance cost. fMaxPreferredRenderTargetSize = SkTMin(4096, fMaxPreferredRenderTargetSize); } fGpuTracingSupport = ctxInfo.hasExtension("GL_EXT_debug_marker"); // Disable scratch texture reuse on Mali and Adreno devices fReuseScratchTextures = kARM_GrGLVendor != ctxInfo.vendor(); #if 0 fReuseScratchBuffers = kARM_GrGLVendor != ctxInfo.vendor() && kQualcomm_GrGLVendor != ctxInfo.vendor(); #endif if (ctxInfo.hasExtension("GL_EXT_window_rectangles")) { GR_GL_GetIntegerv(gli, GR_GL_MAX_WINDOW_RECTANGLES, &fMaxWindowRectangles); } #ifdef SK_BUILD_FOR_WIN // On ANGLE deferring flushes can lead to GPU starvation fPreferVRAMUseOverFlushes = !isANGLE; #endif if (kChromium_GrGLDriver == ctxInfo.driver()) { fMustClearUploadedBufferData = true; } if (kGL_GrGLStandard == standard) { // ARB allows mixed size FBO attachments, EXT does not. if (ctxInfo.version() >= GR_GL_VER(3, 0) || ctxInfo.hasExtension("GL_ARB_framebuffer_object")) { fOversizedStencilSupport = true; } else { SkASSERT(ctxInfo.hasExtension("GL_EXT_framebuffer_object")); } } else { // ES 3.0 supports mixed size FBO attachments, 2.0 does not. fOversizedStencilSupport = ctxInfo.version() >= GR_GL_VER(3, 0); } if (kGL_GrGLStandard == standard) { fDrawIndirectSupport = version >= GR_GL_VER(4,0) || ctxInfo.hasExtension("GL_ARB_draw_indirect"); fBaseInstanceSupport = version >= GR_GL_VER(4,2); fMultiDrawIndirectSupport = version >= GR_GL_VER(4,3) || (fDrawIndirectSupport && !fBaseInstanceSupport && // The ARB extension has no base inst. ctxInfo.hasExtension("GL_ARB_multi_draw_indirect")); fDrawRangeElementsSupport = version >= GR_GL_VER(2,0); } else { fDrawIndirectSupport = version >= GR_GL_VER(3,1); fMultiDrawIndirectSupport = fDrawIndirectSupport && ctxInfo.hasExtension("GL_EXT_multi_draw_indirect"); fBaseInstanceSupport = fDrawIndirectSupport && ctxInfo.hasExtension("GL_EXT_base_instance"); fDrawRangeElementsSupport = version >= GR_GL_VER(3,0); } if (kGL_GrGLStandard == standard) { if ((version >= GR_GL_VER(4, 0) || ctxInfo.hasExtension("GL_ARB_sample_shading"))) { fSampleShadingSupport = true; } } else if (ctxInfo.hasExtension("GL_OES_sample_shading")) { fSampleShadingSupport = true; } // TODO: support CHROMIUM_sync_point and maybe KHR_fence_sync if (kGL_GrGLStandard == standard) { if (version >= GR_GL_VER(3, 2) || ctxInfo.hasExtension("GL_ARB_sync")) { fFenceSyncSupport = true; } } else if (version >= GR_GL_VER(3, 0) || ctxInfo.hasExtension("GL_APPLE_sync")) { fFenceSyncSupport = true; } // Safely moving textures between contexts requires fences. fCrossContextTextureSupport = fFenceSyncSupport; fSRGBDecodeDisableSupport = ctxInfo.hasExtension("GL_EXT_texture_sRGB_decode"); fSRGBDecodeDisableAffectsMipmaps = fSRGBDecodeDisableSupport && kChromium_GrGLDriver != ctxInfo.driver(); if (kGL_GrGLStandard == standard) { if (version >= GR_GL_VER(4, 1)) { fProgramBinarySupport = true; } } else if (version >= GR_GL_VER(3, 0)) { fProgramBinarySupport = true; } if (fProgramBinarySupport) { GrGLint count; GR_GL_GetIntegerv(gli, GR_GL_NUM_SHADER_BINARY_FORMATS, &count); fProgramBinarySupport = count > 0; } // Requires fTextureRedSupport, fTextureSwizzleSupport, msaa support, ES compatibility have // already been detected. this->initConfigTable(contextOptions, ctxInfo, gli, shaderCaps); if (!contextOptions.fDisableDriverCorrectnessWorkarounds) { this->applyDriverCorrectnessWorkarounds(ctxInfo, contextOptions, shaderCaps); } this->applyOptionsOverrides(contextOptions); shaderCaps->applyOptionsOverrides(contextOptions); // For now these two are equivalent but we could have dst read in shader via some other method. shaderCaps->fDstReadInShaderSupport = shaderCaps->fFBFetchSupport; } const char* get_glsl_version_decl_string(GrGLStandard standard, GrGLSLGeneration generation, bool isCoreProfile) { switch (generation) { case k110_GrGLSLGeneration: if (kGLES_GrGLStandard == standard) { // ES2s shader language is based on version 1.20 but is version // 1.00 of the ES language. return "#version 100\n"; } else { SkASSERT(kGL_GrGLStandard == standard); return "#version 110\n"; } case k130_GrGLSLGeneration: SkASSERT(kGL_GrGLStandard == standard); return "#version 130\n"; case k140_GrGLSLGeneration: SkASSERT(kGL_GrGLStandard == standard); return "#version 140\n"; case k150_GrGLSLGeneration: SkASSERT(kGL_GrGLStandard == standard); if (isCoreProfile) { return "#version 150\n"; } else { return "#version 150 compatibility\n"; } case k330_GrGLSLGeneration: if (kGLES_GrGLStandard == standard) { return "#version 300 es\n"; } else { SkASSERT(kGL_GrGLStandard == standard); if (isCoreProfile) { return "#version 330\n"; } else { return "#version 330 compatibility\n"; } } case k400_GrGLSLGeneration: SkASSERT(kGL_GrGLStandard == standard); if (isCoreProfile) { return "#version 400\n"; } else { return "#version 400 compatibility\n"; } case k420_GrGLSLGeneration: SkASSERT(kGL_GrGLStandard == standard); if (isCoreProfile) { return "#version 420\n"; } else { return "#version 420 compatibility\n"; } case k310es_GrGLSLGeneration: SkASSERT(kGLES_GrGLStandard == standard); return "#version 310 es\n"; case k320es_GrGLSLGeneration: SkASSERT(kGLES_GrGLStandard == standard); return "#version 320 es\n"; } return ""; } bool is_float_fp32(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli, GrGLenum precision) { if (kGLES_GrGLStandard != ctxInfo.standard() && ctxInfo.version() < GR_GL_VER(4,1) && !ctxInfo.hasExtension("GL_ARB_ES2_compatibility")) { // We're on a desktop GL that doesn't have precision info. Assume they're all 32bit float. return true; } // glGetShaderPrecisionFormat doesn't accept GL_GEOMETRY_SHADER as a shader type. Hopefully the // geometry shaders don't have lower precision than vertex and fragment. for (GrGLenum shader : {GR_GL_FRAGMENT_SHADER, GR_GL_VERTEX_SHADER}) { GrGLint range[2]; GrGLint bits; GR_GL_GetShaderPrecisionFormat(gli, shader, precision, range, &bits); if (range[0] < 127 || range[1] < 127 || bits < 23) { return false; } } return true; } void GrGLCaps::initGLSL(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) { GrGLStandard standard = ctxInfo.standard(); GrGLVersion version = ctxInfo.version(); /************************************************************************** * Caps specific to GrShaderCaps **************************************************************************/ GrShaderCaps* shaderCaps = fShaderCaps.get(); shaderCaps->fGLSLGeneration = ctxInfo.glslGeneration(); if (kGLES_GrGLStandard == standard) { if (ctxInfo.hasExtension("GL_EXT_shader_framebuffer_fetch")) { shaderCaps->fFBFetchNeedsCustomOutput = (version >= GR_GL_VER(3, 0)); shaderCaps->fFBFetchSupport = true; shaderCaps->fFBFetchColorName = "gl_LastFragData[0]"; shaderCaps->fFBFetchExtensionString = "GL_EXT_shader_framebuffer_fetch"; } else if (ctxInfo.hasExtension("GL_NV_shader_framebuffer_fetch")) { // Actually, we haven't seen an ES3.0 device with this extension yet, so we don't know shaderCaps->fFBFetchNeedsCustomOutput = false; shaderCaps->fFBFetchSupport = true; shaderCaps->fFBFetchColorName = "gl_LastFragData[0]"; shaderCaps->fFBFetchExtensionString = "GL_NV_shader_framebuffer_fetch"; } else if (ctxInfo.hasExtension("GL_ARM_shader_framebuffer_fetch")) { // The arm extension also requires an additional flag which we will set onResetContext shaderCaps->fFBFetchNeedsCustomOutput = false; shaderCaps->fFBFetchSupport = true; shaderCaps->fFBFetchColorName = "gl_LastFragColorARM"; shaderCaps->fFBFetchExtensionString = "GL_ARM_shader_framebuffer_fetch"; } shaderCaps->fUsesPrecisionModifiers = true; } if (kGL_GrGLStandard == standard) { shaderCaps->fFlatInterpolationSupport = ctxInfo.glslGeneration() >= k130_GrGLSLGeneration; } else { shaderCaps->fFlatInterpolationSupport = ctxInfo.glslGeneration() >= k330_GrGLSLGeneration; // This is the value for GLSL ES 3.0. } // Flat interpolation appears to be slow on Qualcomm GPUs (tested Adreno 405 and 530). shaderCaps->fPreferFlatInterpolation = shaderCaps->fFlatInterpolationSupport && kQualcomm_GrGLVendor != ctxInfo.vendor(); if (kGL_GrGLStandard == standard) { shaderCaps->fNoPerspectiveInterpolationSupport = ctxInfo.glslGeneration() >= k130_GrGLSLGeneration; } else { if (ctxInfo.hasExtension("GL_NV_shader_noperspective_interpolation")) { shaderCaps->fNoPerspectiveInterpolationSupport = true; shaderCaps->fNoPerspectiveInterpolationExtensionString = "GL_NV_shader_noperspective_interpolation"; } } shaderCaps->fVersionDeclString = get_glsl_version_decl_string(standard, shaderCaps->fGLSLGeneration, fIsCoreProfile); if (kGLES_GrGLStandard == standard && k110_GrGLSLGeneration == shaderCaps->fGLSLGeneration) { shaderCaps->fShaderDerivativeExtensionString = "GL_OES_standard_derivatives"; } // Frag Coords Convention support is not part of ES if (kGLES_GrGLStandard != standard && (ctxInfo.glslGeneration() >= k150_GrGLSLGeneration || ctxInfo.hasExtension("GL_ARB_fragment_coord_conventions"))) { shaderCaps->fFragCoordConventionsExtensionString = "GL_ARB_fragment_coord_conventions"; } if (kGLES_GrGLStandard == standard) { shaderCaps->fSecondaryOutputExtensionString = "GL_EXT_blend_func_extended"; } if (ctxInfo.hasExtension("GL_OES_EGL_image_external")) { if (ctxInfo.glslGeneration() == k110_GrGLSLGeneration) { shaderCaps->fExternalTextureSupport = true; shaderCaps->fExternalTextureExtensionString = "GL_OES_EGL_image_external"; } else if (ctxInfo.hasExtension("GL_OES_EGL_image_external_essl3") || ctxInfo.hasExtension("OES_EGL_image_external_essl3")) { // At least one driver has been found that has this extension without the "GL_" prefix. shaderCaps->fExternalTextureSupport = true; shaderCaps->fExternalTextureExtensionString = "GL_OES_EGL_image_external_essl3"; } } if (kGL_GrGLStandard == standard) { shaderCaps->fTexelFetchSupport = ctxInfo.glslGeneration() >= k130_GrGLSLGeneration; } else { shaderCaps->fTexelFetchSupport = ctxInfo.glslGeneration() >= k330_GrGLSLGeneration; // We use this value for GLSL ES 3.0. } if (shaderCaps->fTexelFetchSupport) { if (kGL_GrGLStandard == standard) { shaderCaps->fTexelBufferSupport = ctxInfo.version() >= GR_GL_VER(3, 1) && ctxInfo.glslGeneration() >= k330_GrGLSLGeneration; } else { if (ctxInfo.version() >= GR_GL_VER(3, 2) && ctxInfo.glslGeneration() >= k320es_GrGLSLGeneration) { shaderCaps->fTexelBufferSupport = true; } else if (ctxInfo.hasExtension("GL_OES_texture_buffer")) { shaderCaps->fTexelBufferSupport = true; shaderCaps->fTexelBufferExtensionString = "GL_OES_texture_buffer"; } else if (ctxInfo.hasExtension("GL_EXT_texture_buffer")) { shaderCaps->fTexelBufferSupport = true; shaderCaps->fTexelBufferExtensionString = "GL_EXT_texture_buffer"; } } } if (kGL_GrGLStandard == standard) { shaderCaps->fVertexIDSupport = true; } else { // Desktop GLSL 3.30 == ES GLSL 3.00. shaderCaps->fVertexIDSupport = ctxInfo.glslGeneration() >= k330_GrGLSLGeneration; } if (kGL_GrGLStandard == standard) { shaderCaps->fFPManipulationSupport = ctxInfo.glslGeneration() >= k400_GrGLSLGeneration; } else { shaderCaps->fFPManipulationSupport = ctxInfo.glslGeneration() >= k310es_GrGLSLGeneration; } shaderCaps->fFloatIs32Bits = is_float_fp32(ctxInfo, gli, GR_GL_HIGH_FLOAT); shaderCaps->fHalfIs32Bits = is_float_fp32(ctxInfo, gli, GR_GL_MEDIUM_FLOAT); } bool GrGLCaps::hasPathRenderingSupport(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) { bool hasChromiumPathRendering = ctxInfo.hasExtension("GL_CHROMIUM_path_rendering"); if (!(ctxInfo.hasExtension("GL_NV_path_rendering") || hasChromiumPathRendering)) { return false; } if (kGL_GrGLStandard == ctxInfo.standard()) { if (ctxInfo.version() < GR_GL_VER(4, 3) && !ctxInfo.hasExtension("GL_ARB_program_interface_query")) { return false; } } else { if (!hasChromiumPathRendering && ctxInfo.version() < GR_GL_VER(3, 1)) { return false; } } // We only support v1.3+ of GL_NV_path_rendering which allows us to // set individual fragment inputs with ProgramPathFragmentInputGen. The API // additions are detected by checking the existence of the function. // We also use *Then* functions that not all drivers might have. Check // them for consistency. if (!gli->fFunctions.fStencilThenCoverFillPath || !gli->fFunctions.fStencilThenCoverStrokePath || !gli->fFunctions.fStencilThenCoverFillPathInstanced || !gli->fFunctions.fStencilThenCoverStrokePathInstanced || !gli->fFunctions.fProgramPathFragmentInputGen) { return false; } return true; } bool GrGLCaps::readPixelsSupported(GrPixelConfig surfaceConfig, GrPixelConfig readConfig, std::function getIntegerv, std::function bindRenderTarget, std::function unbindRenderTarget) const { // If it's not possible to even have a color attachment of surfaceConfig then read pixels is // not supported regardless of readConfig. if (!this->canConfigBeFBOColorAttachment(surfaceConfig)) { return false; } GrGLenum readFormat; GrGLenum readType; if (!this->getReadPixelsFormat(surfaceConfig, readConfig, &readFormat, &readType)) { return false; } if (kGL_GrGLStandard == fStandard) { // Some OpenGL implementations allow GL_ALPHA as a format to glReadPixels. However, // the manual (https://www.opengl.org/sdk/docs/man/) says only these formats are allowed: // GL_STENCIL_INDEX, GL_DEPTH_COMPONENT, GL_DEPTH_STENCIL, GL_RED, GL_GREEN, GL_BLUE, // GL_RGB, GL_BGR, GL_RGBA, and GL_BGRA. We check for the subset that we would use. // The manual does not seem to fully match the spec as the spec allows integer formats // when the bound color buffer is an integer buffer. It doesn't specify which integer // formats are allowed, so perhaps all of them are. We only use GL_RGBA_INTEGER currently. if (readFormat != GR_GL_RED && readFormat != GR_GL_RG && readFormat != GR_GL_RGB && readFormat != GR_GL_RGBA && readFormat != GR_GL_BGRA && readFormat != GR_GL_RGBA_INTEGER) { return false; } // There is also a set of allowed types, but all the types we use are in the set: // GL_UNSIGNED_BYTE, GL_BYTE, GL_UNSIGNED_SHORT, GL_SHORT, GL_UNSIGNED_INT, GL_INT, // GL_HALF_FLOAT, GL_FLOAT, GL_UNSIGNED_BYTE_3_3_2, GL_UNSIGNED_BYTE_2_3_3_REV, // GL_UNSIGNED_SHORT_5_6_5, GL_UNSIGNED_SHORT_5_6_5_REV, GL_UNSIGNED_SHORT_4_4_4_4, // GL_UNSIGNED_SHORT_4_4_4_4_REV, GL_UNSIGNED_SHORT_5_5_5_1, GL_UNSIGNED_SHORT_1_5_5_5_REV, // GL_UNSIGNED_INT_8_8_8_8, GL_UNSIGNED_INT_8_8_8_8_REV,GL_UNSIGNED_INT_10_10_10_2, // GL_UNSIGNED_INT_2_10_10_10_REV, GL_UNSIGNED_INT_24_8, GL_UNSIGNED_INT_10F_11F_11F_REV, // GL_UNSIGNED_INT_5_9_9_9_REV, or GL_FLOAT_32_UNSIGNED_INT_24_8_REV. return true; } // See Section 16.1.2 in the ES 3.2 specification. switch (fConfigTable[surfaceConfig].fFormatType) { case kNormalizedFixedPoint_FormatType: if (GR_GL_RGBA == readFormat && GR_GL_UNSIGNED_BYTE == readType) { return true; } break; case kFloat_FormatType: if (GR_GL_RGBA == readFormat && GR_GL_FLOAT == readType) { return true; } break; } if (0 == fConfigTable[surfaceConfig].fSecondReadPixelsFormat.fFormat) { ReadPixelsFormat* rpFormat = const_cast(&fConfigTable[surfaceConfig].fSecondReadPixelsFormat); GrGLint format = 0, type = 0; if (!bindRenderTarget()) { return false; } getIntegerv(GR_GL_IMPLEMENTATION_COLOR_READ_FORMAT, &format); getIntegerv(GR_GL_IMPLEMENTATION_COLOR_READ_TYPE, &type); rpFormat->fFormat = format; rpFormat->fType = type; unbindRenderTarget(); } return fConfigTable[surfaceConfig].fSecondReadPixelsFormat.fFormat == readFormat && fConfigTable[surfaceConfig].fSecondReadPixelsFormat.fType == readType; } void GrGLCaps::initFSAASupport(const GrContextOptions& contextOptions, const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) { // We need dual source blending and the ability to disable multisample in order to support mixed // samples in every corner case. We only use mixed samples if the stencil-and-cover path // renderer is available and enabled; no other path renderers support this feature. if (fMultisampleDisableSupport && this->shaderCaps()->dualSourceBlendingSupport() && this->shaderCaps()->pathRenderingSupport() #if GR_TEST_UTILS && (contextOptions.fGpuPathRenderers & GpuPathRenderers::kStencilAndCover) #endif ) { fUsesMixedSamples = ctxInfo.hasExtension("GL_NV_framebuffer_mixed_samples") || ctxInfo.hasExtension("GL_CHROMIUM_framebuffer_mixed_samples"); } if (kGL_GrGLStandard != ctxInfo.standard()) { if (ctxInfo.version() >= GR_GL_VER(3,0) && ctxInfo.renderer() != kGalliumLLVM_GrGLRenderer) { // The gallium llvmpipe renderer for es3.0 does not have textureRed support even though // it is part of the spec. Thus alpha8 will not be renderable for those devices. fAlpha8IsRenderable = true; } // We prefer multisampled-render-to-texture extensions over ES3 MSAA because we've observed // ES3 driver bugs on at least one device with a tiled GPU (N10). However, if we're using // mixed samples we can't use multisampled-render-to-texture. if (fUsesMixedSamples) { fMSFBOType = kMixedSamples_MSFBOType; } else if (ctxInfo.hasExtension("GL_EXT_multisampled_render_to_texture")) { fMSFBOType = kES_EXT_MsToTexture_MSFBOType; } else if (ctxInfo.hasExtension("GL_IMG_multisampled_render_to_texture")) { fMSFBOType = kES_IMG_MsToTexture_MSFBOType; } else if (ctxInfo.version() >= GR_GL_VER(3,0)) { fMSFBOType = kStandard_MSFBOType; } else if (ctxInfo.hasExtension("GL_CHROMIUM_framebuffer_multisample")) { fMSFBOType = kStandard_MSFBOType; } else if (ctxInfo.hasExtension("GL_ANGLE_framebuffer_multisample")) { fMSFBOType = kStandard_MSFBOType; } else if (ctxInfo.hasExtension("GL_APPLE_framebuffer_multisample")) { fMSFBOType = kES_Apple_MSFBOType; } } else { if (fUsesMixedSamples) { fMSFBOType = kMixedSamples_MSFBOType; } else if (ctxInfo.version() >= GR_GL_VER(3,0) || ctxInfo.hasExtension("GL_ARB_framebuffer_object")) { fMSFBOType = kStandard_MSFBOType; if (!fIsCoreProfile && ctxInfo.renderer() != kOSMesa_GrGLRenderer) { // Core profile removes ALPHA8 support. // OpenGL 3.0+ (and GL_ARB_framebuffer_object) supports ALPHA8 as renderable. // However, osmesa fails if it is used even when GL_ARB_framebuffer_object is // present. fAlpha8IsRenderable = true; } } else if (ctxInfo.hasExtension("GL_EXT_framebuffer_multisample") && ctxInfo.hasExtension("GL_EXT_framebuffer_blit")) { fMSFBOType = kStandard_MSFBOType; } } // We disable MSAA across the board for Intel GPUs for performance reasons. if (kIntel_GrGLVendor == ctxInfo.vendor()) { fMSFBOType = kNone_MSFBOType; } // We only have a use for raster multisample if there is coverage modulation from mixed samples. if (fUsesMixedSamples && ctxInfo.hasExtension("GL_EXT_raster_multisample")) { GR_GL_GetIntegerv(gli, GR_GL_MAX_RASTER_SAMPLES, &fMaxRasterSamples); } } void GrGLCaps::initBlendEqationSupport(const GrGLContextInfo& ctxInfo) { GrShaderCaps* shaderCaps = static_cast(fShaderCaps.get()); bool layoutQualifierSupport = false; if ((kGL_GrGLStandard == fStandard && shaderCaps->generation() >= k140_GrGLSLGeneration) || (kGLES_GrGLStandard == fStandard && shaderCaps->generation() >= k330_GrGLSLGeneration)) { layoutQualifierSupport = true; } if (ctxInfo.hasExtension("GL_NV_blend_equation_advanced_coherent")) { fBlendEquationSupport = kAdvancedCoherent_BlendEquationSupport; shaderCaps->fAdvBlendEqInteraction = GrShaderCaps::kAutomatic_AdvBlendEqInteraction; } else if (ctxInfo.hasExtension("GL_KHR_blend_equation_advanced_coherent") && layoutQualifierSupport) { fBlendEquationSupport = kAdvancedCoherent_BlendEquationSupport; shaderCaps->fAdvBlendEqInteraction = GrShaderCaps::kGeneralEnable_AdvBlendEqInteraction; } else if (ctxInfo.hasExtension("GL_NV_blend_equation_advanced")) { fBlendEquationSupport = kAdvanced_BlendEquationSupport; shaderCaps->fAdvBlendEqInteraction = GrShaderCaps::kAutomatic_AdvBlendEqInteraction; } else if (ctxInfo.hasExtension("GL_KHR_blend_equation_advanced") && layoutQualifierSupport) { fBlendEquationSupport = kAdvanced_BlendEquationSupport; shaderCaps->fAdvBlendEqInteraction = GrShaderCaps::kGeneralEnable_AdvBlendEqInteraction; // TODO: Use kSpecificEnables_AdvBlendEqInteraction if "blend_support_all_equations" is // slow on a particular platform. } } namespace { const GrGLuint kUnknownBitCount = GrGLStencilAttachment::kUnknownBitCount; } void GrGLCaps::initStencilSupport(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 (kGL_GrGLStandard == ctxInfo.standard()) { 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.version() >= GR_GL_VER(3,0) || ctxInfo.hasExtension("GL_OES_packed_depth_stencil")) { fStencilFormats.push_back() = gD24S8; } if (ctxInfo.hasExtension("GL_OES_stencil4")) { fStencilFormats.push_back() = gS4; } } } void GrGLCaps::onDumpJSON(SkJSONWriter* writer) const { // We are called by the base class, which has already called beginObject(). We choose to nest // all of our caps information in a named sub-object. writer->beginObject("GL caps"); writer->beginArray("Stencil Formats"); for (int i = 0; i < fStencilFormats.count(); ++i) { writer->beginObject(nullptr, false); writer->appendS32("stencil bits", fStencilFormats[i].fStencilBits); writer->appendS32("total bits", fStencilFormats[i].fTotalBits); writer->endObject(); } writer->endArray(); static const char* kMSFBOExtStr[] = { "None", "Standard", "Apple", "IMG MS To Texture", "EXT MS To Texture", "MixedSamples", }; GR_STATIC_ASSERT(0 == kNone_MSFBOType); GR_STATIC_ASSERT(1 == kStandard_MSFBOType); GR_STATIC_ASSERT(2 == kES_Apple_MSFBOType); GR_STATIC_ASSERT(3 == kES_IMG_MsToTexture_MSFBOType); GR_STATIC_ASSERT(4 == kES_EXT_MsToTexture_MSFBOType); GR_STATIC_ASSERT(5 == kMixedSamples_MSFBOType); GR_STATIC_ASSERT(SK_ARRAY_COUNT(kMSFBOExtStr) == kLast_MSFBOType + 1); static const char* kInvalidateFBTypeStr[] = { "None", "Discard", "Invalidate", }; GR_STATIC_ASSERT(0 == kNone_InvalidateFBType); GR_STATIC_ASSERT(1 == kDiscard_InvalidateFBType); GR_STATIC_ASSERT(2 == kInvalidate_InvalidateFBType); GR_STATIC_ASSERT(SK_ARRAY_COUNT(kInvalidateFBTypeStr) == kLast_InvalidateFBType + 1); static const char* kMapBufferTypeStr[] = { "None", "MapBuffer", "MapBufferRange", "Chromium", }; GR_STATIC_ASSERT(0 == kNone_MapBufferType); GR_STATIC_ASSERT(1 == kMapBuffer_MapBufferType); GR_STATIC_ASSERT(2 == kMapBufferRange_MapBufferType); GR_STATIC_ASSERT(3 == kChromium_MapBufferType); GR_STATIC_ASSERT(SK_ARRAY_COUNT(kMapBufferTypeStr) == kLast_MapBufferType + 1); writer->appendBool("Core Profile", fIsCoreProfile); writer->appendString("MSAA Type", kMSFBOExtStr[fMSFBOType]); writer->appendString("Invalidate FB Type", kInvalidateFBTypeStr[fInvalidateFBType]); writer->appendString("Map Buffer Type", kMapBufferTypeStr[fMapBufferType]); writer->appendS32("Max FS Uniform Vectors", fMaxFragmentUniformVectors); writer->appendBool("Unpack Row length support", fUnpackRowLengthSupport); writer->appendBool("Unpack Flip Y support", fUnpackFlipYSupport); writer->appendBool("Pack Row length support", fPackRowLengthSupport); writer->appendBool("Pack Flip Y support", fPackFlipYSupport); writer->appendBool("Texture Usage support", fTextureUsageSupport); writer->appendBool("Alpha8 is renderable", fAlpha8IsRenderable); writer->appendBool("GL_ARB_imaging support", fImagingSupport); writer->appendBool("Vertex array object support", fVertexArrayObjectSupport); writer->appendBool("Debug support", fDebugSupport); writer->appendBool("Draw indirect support", fDrawIndirectSupport); writer->appendBool("Multi draw indirect support", fMultiDrawIndirectSupport); writer->appendBool("Base instance support", fBaseInstanceSupport); writer->appendBool("RGBA 8888 pixel ops are slow", fRGBA8888PixelsOpsAreSlow); writer->appendBool("Partial FBO read is slow", fPartialFBOReadIsSlow); writer->appendBool("Bind uniform location support", fBindUniformLocationSupport); writer->appendBool("Rectangle texture support", fRectangleTextureSupport); writer->appendBool("Texture swizzle support", fTextureSwizzleSupport); writer->appendBool("BGRA to RGBA readback conversions are slow", fRGBAToBGRAReadbackConversionsAreSlow); writer->appendBool("Use buffer data null hint", fUseBufferDataNullHint); writer->appendBool("Draw To clear color", fUseDrawToClearColor); writer->appendBool("Draw To clear stencil clip", fUseDrawToClearStencilClip); writer->appendBool("Intermediate texture for partial updates of unorm textures ever bound to FBOs", fDisallowTexSubImageForUnormConfigTexturesEverBoundToFBO); writer->appendBool("Intermediate texture for all updates of textures bound to FBOs", fUseDrawInsteadOfAllRenderTargetWrites); writer->appendBool("Max instances per glDrawArraysInstanced without crashing (or zero)", fMaxInstancesPerDrawArraysWithoutCrashing); writer->beginArray("configs"); for (int i = 0; i < kGrPixelConfigCnt; ++i) { writer->beginObject(nullptr, false); writer->appendHexU32("flags", fConfigTable[i].fFlags); writer->appendHexU32("b_internal", fConfigTable[i].fFormats.fBaseInternalFormat); writer->appendHexU32("s_internal", fConfigTable[i].fFormats.fSizedInternalFormat); writer->appendHexU32("e_format_read_pixels", fConfigTable[i].fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage]); writer->appendHexU32( "e_format_teximage", fConfigTable[i].fFormats.fExternalFormat[kTexImage_ExternalFormatUsage]); writer->appendHexU32("e_type", fConfigTable[i].fFormats.fExternalType); writer->appendHexU32("i_for_teximage", fConfigTable[i].fFormats.fInternalFormatTexImage); writer->appendHexU32("i_for_renderbuffer", fConfigTable[i].fFormats.fInternalFormatRenderbuffer); writer->endObject(); } writer->endArray(); writer->endObject(); } bool GrGLCaps::bgraIsInternalFormat() const { return fConfigTable[kBGRA_8888_GrPixelConfig].fFormats.fBaseInternalFormat == GR_GL_BGRA; } bool GrGLCaps::getTexImageFormats(GrPixelConfig surfaceConfig, GrPixelConfig externalConfig, GrGLenum* internalFormat, GrGLenum* externalFormat, GrGLenum* externalType) const { if (!this->getExternalFormat(surfaceConfig, externalConfig, kTexImage_ExternalFormatUsage, externalFormat, externalType)) { return false; } *internalFormat = fConfigTable[surfaceConfig].fFormats.fInternalFormatTexImage; return true; } bool GrGLCaps::getReadPixelsFormat(GrPixelConfig surfaceConfig, GrPixelConfig externalConfig, GrGLenum* externalFormat, GrGLenum* externalType) const { if (!this->getExternalFormat(surfaceConfig, externalConfig, kReadPixels_ExternalFormatUsage, externalFormat, externalType)) { return false; } return true; } bool GrGLCaps::getRenderbufferFormat(GrPixelConfig config, GrGLenum* internalFormat) const { *internalFormat = fConfigTable[config].fFormats.fInternalFormatRenderbuffer; return true; } bool GrGLCaps::getExternalFormat(GrPixelConfig surfaceConfig, GrPixelConfig memoryConfig, ExternalFormatUsage usage, GrGLenum* externalFormat, GrGLenum* externalType) const { SkASSERT(externalFormat && externalType); bool surfaceIsAlphaOnly = GrPixelConfigIsAlphaOnly(surfaceConfig); bool memoryIsAlphaOnly = GrPixelConfigIsAlphaOnly(memoryConfig); // We don't currently support moving RGBA data into and out of ALPHA surfaces. It could be // made to work. However, this is complicated by the use of GL_RED for alpha-only textures but // is not needed currently. if (surfaceIsAlphaOnly && !memoryIsAlphaOnly) { return false; } *externalFormat = fConfigTable[memoryConfig].fFormats.fExternalFormat[usage]; *externalType = fConfigTable[memoryConfig].fFormats.fExternalType; // When GL_RED is supported as a texture format, our alpha-only textures are stored using // GL_RED and we swizzle in order to map all components to 'r'. However, in this case the // surface is not alpha-only and we want alpha to really mean the alpha component of the // texture, not the red component. if (memoryIsAlphaOnly && !surfaceIsAlphaOnly) { if (GR_GL_RED == *externalFormat) { *externalFormat = GR_GL_ALPHA; } } return true; } void GrGLCaps::initConfigTable(const GrContextOptions& contextOptions, const GrGLContextInfo& ctxInfo, const GrGLInterface* gli, GrShaderCaps* shaderCaps) { /* Comments on renderability of configs on various GL versions. OpenGL < 3.0: no built in support for render targets. GL_EXT_framebuffer_object adds possible support for any sized format with base internal format RGB, RGBA and NV float formats we don't use. This is the following: R3_G3_B2, RGB4, RGB5, RGB8, RGB10, RGB12, RGB16, RGBA2, RGBA4, RGB5_A1, RGBA8 RGB10_A2, RGBA12,RGBA16 Though, it is hard to believe the more obscure formats such as RGBA12 would work since they aren't required by later standards and the driver can simply return FRAMEBUFFER_UNSUPPORTED for anything it doesn't allow. GL_ARB_framebuffer_object adds everything added by the EXT extension and additionally any sized internal format with a base internal format of ALPHA, LUMINANCE, LUMINANCE_ALPHA, INTENSITY, RED, and RG. This adds a lot of additional renderable sized formats, including ALPHA8. The GL_ARB_texture_rg brings in the RED and RG formats (8, 8I, 8UI, 16, 16I, 16UI, 16F, 32I, 32UI, and 32F variants). Again, the driver has an escape hatch via FRAMEBUFFER_UNSUPPORTED. For both the above extensions we limit ourselves to those that are also required by OpenGL 3.0. OpenGL 3.0: Any format with base internal format ALPHA, RED, RG, RGB or RGBA is "color-renderable" but are not required to be supported as renderable textures/renderbuffer. Required renderable color formats: - RGBA32F, RGBA32I, RGBA32UI, RGBA16, RGBA16F, RGBA16I, RGBA16UI, RGBA8, RGBA8I, RGBA8UI, SRGB8_ALPHA8, and RGB10_A2. - R11F_G11F_B10F. - RG32F, RG32I, RG32UI, RG16, RG16F, RG16I, RG16UI, RG8, RG8I, and RG8UI. - R32F, R32I, R32UI, R16F, R16I, R16UI, R16, R8, R8I, and R8UI. - ALPHA8 OpenGL 3.1, 3.2, 3.3 Same as 3.0 except ALPHA8 requires GL_ARB_compatibility/compatibility profile. OpengGL 3.3, 4.0, 4.1 Adds RGB10_A2UI. OpengGL 4.2 Adds - RGB5_A1, RGBA4 - RGB565 OpenGL 4.4 Does away with the separate list and adds a column to the sized internal color format table. However, no new formats become required color renderable. ES 2.0 color renderable: RGBA4, RGB5_A1, RGB565 GL_EXT_texture_rg adds support for R8, RG5 as a color render target GL_OES_rgb8_rgba8 adds support for RGB8 and RGBA8 GL_ARM_rgba8 adds support for RGBA8 (but not RGB8) GL_EXT_texture_format_BGRA8888 does not add renderbuffer support GL_CHROMIUM_renderbuffer_format_BGRA8888 adds BGRA8 as color-renderable GL_APPLE_texture_format_BGRA8888 does not add renderbuffer support ES 3.0 - RGBA32I, RGBA32UI, RGBA16I, RGBA16UI, RGBA8, RGBA8I, RGBA8UI, SRGB8_ALPHA8, RGB10_A2, RGB10_A2UI, RGBA4, and RGB5_A1. - RGB8 and RGB565. - RG32I, RG32UI, RG16I, RG16UI, RG8, RG8I, and RG8UI. - R32I, R32UI, R16I, R16UI, R8, R8I, and R8UI ES 3.1 Adds RGB10_A2, RGB10_A2UI, ES 3.2 Adds R16F, RG16F, RGBA16F, R32F, RG32F, RGBA32F, R11F_G11F_B10F. */ // Correctness workarounds. bool disableTextureRedForMesa = false; bool disableSRGBForX86PowerVR = false; bool disableSRGBWriteControlForAdreno4xx = false; bool disableR8TexStorageForANGLEGL = false; bool disableSRGBRenderWithMSAAForMacAMD = false; bool disableRGB8ForMali400 = false; if (!contextOptions.fDisableDriverCorrectnessWorkarounds) { // ARB_texture_rg is part of OpenGL 3.0, but osmesa doesn't support GL_RED // and GL_RG on FBO textures. disableTextureRedForMesa = kOSMesa_GrGLRenderer == ctxInfo.renderer(); bool isX86PowerVR = false; #if defined(SK_CPU_X86) if (kPowerVRRogue_GrGLRenderer == ctxInfo.renderer()) { isX86PowerVR = true; } #endif // NexusPlayer has strange bugs with sRGB (skbug.com/4148). This is a targeted fix to // blacklist that device (and any others that might be sharing the same driver). disableSRGBForX86PowerVR = isX86PowerVR; disableSRGBWriteControlForAdreno4xx = kAdreno4xx_GrGLRenderer == ctxInfo.renderer(); // Angle with es2->GL has a bug where it will hang trying to call TexSubImage on GL_R8 // formats on miplevels > 0. We already disable texturing on gles > 2.0 so just need to // check that we are not going to OpenGL. disableR8TexStorageForANGLEGL = GrGLANGLEBackend::kOpenGL == ctxInfo.angleBackend(); // MacPro devices with AMD cards fail to create MSAA sRGB render buffers. #if defined(SK_BUILD_FOR_MAC) disableSRGBRenderWithMSAAForMacAMD = kATI_GrGLVendor == ctxInfo.vendor(); #endif // Mali-400 fails ReadPixels tests, mostly with non-0xFF alpha values when read as GL_RGBA8. disableRGB8ForMali400 = kMali4xx_GrGLRenderer == ctxInfo.renderer(); } uint32_t nonMSAARenderFlags = ConfigInfo::kRenderable_Flag | ConfigInfo::kFBOColorAttachment_Flag; uint32_t allRenderFlags = nonMSAARenderFlags; if (kNone_MSFBOType != fMSFBOType) { allRenderFlags |= ConfigInfo::kRenderableWithMSAA_Flag; } GrGLStandard standard = ctxInfo.standard(); GrGLVersion version = ctxInfo.version(); bool texStorageSupported = false; if (kGL_GrGLStandard == standard) { // The EXT version can apply to either GL or GLES. texStorageSupported = version >= GR_GL_VER(4,2) || ctxInfo.hasExtension("GL_ARB_texture_storage") || ctxInfo.hasExtension("GL_EXT_texture_storage"); } else { texStorageSupported = version >= GR_GL_VER(3,0) || ctxInfo.hasExtension("GL_EXT_texture_storage"); } bool texelBufferSupport = this->shaderCaps()->texelBufferSupport(); bool textureRedSupport = false; if (!disableTextureRedForMesa) { if (kGL_GrGLStandard == standard) { textureRedSupport = version >= GR_GL_VER(3, 0) || ctxInfo.hasExtension("GL_ARB_texture_rg"); } else { textureRedSupport = version >= GR_GL_VER(3, 0) || ctxInfo.hasExtension("GL_EXT_texture_rg"); } } fConfigTable[kUnknown_GrPixelConfig].fFormats.fBaseInternalFormat = 0; fConfigTable[kUnknown_GrPixelConfig].fFormats.fSizedInternalFormat = 0; fConfigTable[kUnknown_GrPixelConfig].fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage] = 0; fConfigTable[kUnknown_GrPixelConfig].fFormats.fExternalType = 0; fConfigTable[kUnknown_GrPixelConfig].fFormatType = kNormalizedFixedPoint_FormatType; fConfigTable[kUnknown_GrPixelConfig].fSwizzle = GrSwizzle::RGBA(); fConfigTable[kRGBA_8888_GrPixelConfig].fFormats.fBaseInternalFormat = GR_GL_RGBA; fConfigTable[kRGBA_8888_GrPixelConfig].fFormats.fSizedInternalFormat = GR_GL_RGBA8; fConfigTable[kRGBA_8888_GrPixelConfig].fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage] = GR_GL_RGBA; fConfigTable[kRGBA_8888_GrPixelConfig].fFormats.fExternalType = GR_GL_UNSIGNED_BYTE; fConfigTable[kRGBA_8888_GrPixelConfig].fFormatType = kNormalizedFixedPoint_FormatType; fConfigTable[kRGBA_8888_GrPixelConfig].fFlags = ConfigInfo::kTextureable_Flag; if (kGL_GrGLStandard == standard) { // We require some form of FBO support and all GLs with FBO support can render to RGBA8 fConfigTable[kRGBA_8888_GrPixelConfig].fFlags |= allRenderFlags; } else { if (version >= GR_GL_VER(3,0) || ctxInfo.hasExtension("GL_OES_rgb8_rgba8") || ctxInfo.hasExtension("GL_ARM_rgba8")) { fConfigTable[kRGBA_8888_GrPixelConfig].fFlags |= allRenderFlags; } } if (texStorageSupported) { fConfigTable[kRGBA_8888_GrPixelConfig].fFlags |= ConfigInfo::kCanUseTexStorage_Flag; } if (texelBufferSupport) { fConfigTable[kRGBA_8888_GrPixelConfig].fFlags |= ConfigInfo::kCanUseWithTexelBuffer_Flag; } fConfigTable[kRGBA_8888_GrPixelConfig].fSwizzle = GrSwizzle::RGBA(); fConfigTable[kRGB_888_GrPixelConfig].fFormats.fBaseInternalFormat = GR_GL_RGB; fConfigTable[kRGB_888_GrPixelConfig].fFormats.fSizedInternalFormat = GR_GL_RGB8; // Our external RGB data always has a byte where alpha would be. When calling read pixels we // want to read to kRGB_888x color type and ensure that gets 0xFF written. Using GL_RGB would // read back unaligned 24bit RGB color values. Note that this all a bit moot as we don't // currently expect to ever read back GrColorType::kRGB_888x because our implementation of // supportedReadPixelsColorType never returns it. fConfigTable[kRGB_888_GrPixelConfig].fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage] = GR_GL_RGBA; fConfigTable[kRGB_888_GrPixelConfig].fFormats.fExternalType = GR_GL_UNSIGNED_BYTE; fConfigTable[kRGB_888_GrPixelConfig].fFormatType = kNormalizedFixedPoint_FormatType; fConfigTable[kRGB_888_GrPixelConfig].fFlags = ConfigInfo::kTextureable_Flag; if (kGL_GrGLStandard == standard) { // Even in OpenGL 4.6 GL_RGB8 is required to be color renderable but not required to be a // supported render buffer format. Since we usually use render buffers for MSAA on non-ES GL // we don't support MSAA for GL_RGB8. On 4.2+ we could check using // glGetInternalFormativ(GL_RENDERBUFFER, GL_RGB8, GL_INTERNALFORMAT_SUPPORTED, ...) if this // becomes an issue. // This also would probably work in mixed-samples mode where there is no MSAA color buffer // but we don't support that just for simplicity's sake. fConfigTable[kRGB_888_GrPixelConfig].fFlags |= nonMSAARenderFlags; } else { // 3.0 and the extension support this as a render buffer format. if (version >= GR_GL_VER(3, 0) || ctxInfo.hasExtension("GL_OES_rgb8_rgba8")) { fConfigTable[kRGB_888_GrPixelConfig].fFlags |= allRenderFlags; } } if (texStorageSupported) { fConfigTable[kRGB_888_GrPixelConfig].fFlags |= ConfigInfo::kCanUseTexStorage_Flag; } fConfigTable[kRGB_888_GrPixelConfig].fSwizzle = GrSwizzle::RGBA(); if (disableRGB8ForMali400) { fConfigTable[kRGB_888_GrPixelConfig].fFlags = 0; } fConfigTable[kBGRA_8888_GrPixelConfig].fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage] = GR_GL_BGRA; fConfigTable[kBGRA_8888_GrPixelConfig].fFormats.fExternalType = GR_GL_UNSIGNED_BYTE; fConfigTable[kBGRA_8888_GrPixelConfig].fFormatType = kNormalizedFixedPoint_FormatType; // TexStorage requires using a sized internal format and BGRA8 is only supported if we have the // GL_APPLE_texture_format_BGRA8888 extension or if we have GL_EXT_texutre_storage and // GL_EXT_texture_format_BGRA8888. bool supportsBGRATexStorage = false; if (kGL_GrGLStandard == standard) { fConfigTable[kBGRA_8888_GrPixelConfig].fFormats.fBaseInternalFormat = GR_GL_RGBA; fConfigTable[kBGRA_8888_GrPixelConfig].fFormats.fSizedInternalFormat = GR_GL_RGBA8; if (version >= GR_GL_VER(1, 2) || ctxInfo.hasExtension("GL_EXT_bgra")) { // Since the internal format is RGBA8, it is also renderable. fConfigTable[kBGRA_8888_GrPixelConfig].fFlags = ConfigInfo::kTextureable_Flag | allRenderFlags; } // Since we are using RGBA8 we can use tex storage. supportsBGRATexStorage = true; } else { fConfigTable[kBGRA_8888_GrPixelConfig].fFormats.fBaseInternalFormat = GR_GL_BGRA; fConfigTable[kBGRA_8888_GrPixelConfig].fFormats.fSizedInternalFormat = GR_GL_BGRA8; if (ctxInfo.hasExtension("GL_EXT_texture_format_BGRA8888")) { fConfigTable[kBGRA_8888_GrPixelConfig].fFlags = ConfigInfo::kTextureable_Flag | nonMSAARenderFlags; if (ctxInfo.hasExtension("GL_EXT_texture_storage")) { supportsBGRATexStorage = true; } if (ctxInfo.hasExtension("GL_CHROMIUM_renderbuffer_format_BGRA8888") && (this->usesMSAARenderBuffers() || this->fMSFBOType == kMixedSamples_MSFBOType)) { fConfigTable[kBGRA_8888_GrPixelConfig].fFlags |= ConfigInfo::kRenderableWithMSAA_Flag; } } else if (ctxInfo.hasExtension("GL_APPLE_texture_format_BGRA8888")) { // This APPLE extension introduces complexity on ES2. It leaves the internal format // as RGBA, but allows BGRA as the external format. From testing, it appears that the // driver remembers the external format when the texture is created (with TexImage). // If you then try to upload data in the other swizzle (with TexSubImage), it fails. // We could work around this, but it adds even more state tracking to code that is // already too tricky. Instead, we opt not to support BGRA on ES2 with this extension. // This also side-steps some ambiguous interactions with the texture storage extension. if (version >= GR_GL_VER(3,0)) { // The APPLE extension doesn't make this renderable. fConfigTable[kBGRA_8888_GrPixelConfig].fFlags = ConfigInfo::kTextureable_Flag; supportsBGRATexStorage = true; } } } if (texStorageSupported && supportsBGRATexStorage) { fConfigTable[kBGRA_8888_GrPixelConfig].fFlags |= ConfigInfo::kCanUseTexStorage_Flag; } fConfigTable[kBGRA_8888_GrPixelConfig].fSwizzle = GrSwizzle::RGBA(); // We only enable srgb support if both textures and FBOs support srgb, // *and* we can disable sRGB decode-on-read, to support "legacy" mode. if (kGL_GrGLStandard == standard) { if (ctxInfo.version() >= GR_GL_VER(3,0)) { fSRGBSupport = true; } else if (ctxInfo.hasExtension("GL_EXT_texture_sRGB")) { if (ctxInfo.hasExtension("GL_ARB_framebuffer_sRGB") || ctxInfo.hasExtension("GL_EXT_framebuffer_sRGB")) { fSRGBSupport = true; } } // All the above srgb extensions support toggling srgb writes if (fSRGBSupport) { fSRGBWriteControl = true; } } else { fSRGBSupport = ctxInfo.version() >= GR_GL_VER(3,0) || ctxInfo.hasExtension("GL_EXT_sRGB"); if (disableSRGBForX86PowerVR) { fSRGBSupport = false; } // ES through 3.1 requires EXT_srgb_write_control to support toggling // sRGB writing for destinations. // See https://bug.skia.org/5329 for Adreno4xx issue. fSRGBWriteControl = !disableSRGBWriteControlForAdreno4xx && ctxInfo.hasExtension("GL_EXT_sRGB_write_control"); } if (contextOptions.fRequireDecodeDisableForSRGB && !fSRGBDecodeDisableSupport) { // To support "legacy" L32 mode, we require the ability to turn off sRGB decode. Clients // can opt-out of that requirement, if they intend to always do linear blending. fSRGBSupport = false; } // This is very conservative, if we're on a platform where N32 is BGRA, and using ES, disable // all sRGB support. Too much code relies on creating surfaces with N32 + sRGB colorspace, // and sBGRA is basically impossible to support on any version of ES (with our current code). // In particular, ES2 doesn't support sBGRA at all, and even in ES3, there is no valid pair // of formats that can be used for TexImage calls to upload BGRA data to sRGBA (which is what // we *have* to use as the internal format, because sBGRA doesn't exist). This primarily // affects Windows. if (kSkia8888_GrPixelConfig == kBGRA_8888_GrPixelConfig && kGLES_GrGLStandard == standard) { fSRGBSupport = false; } // ES2 Command Buffer has several TexStorage restrictions. It appears to fail for any format // not explicitly allowed by GL_EXT_texture_storage, particularly those from other extensions. bool isCommandBufferES2 = kChromium_GrGLDriver == ctxInfo.driver() && version < GR_GL_VER(3, 0); uint32_t srgbRenderFlags = allRenderFlags; if (disableSRGBRenderWithMSAAForMacAMD) { srgbRenderFlags &= ~ConfigInfo::kRenderableWithMSAA_Flag; } fConfigTable[kSRGBA_8888_GrPixelConfig].fFormats.fBaseInternalFormat = GR_GL_SRGB_ALPHA; fConfigTable[kSRGBA_8888_GrPixelConfig].fFormats.fSizedInternalFormat = GR_GL_SRGB8_ALPHA8; // GL does not do srgb<->rgb conversions when transferring between cpu and gpu. Thus, the // external format is GL_RGBA. See below for note about ES2.0 and glTex[Sub]Image. fConfigTable[kSRGBA_8888_GrPixelConfig].fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage] = GR_GL_RGBA; fConfigTable[kSRGBA_8888_GrPixelConfig].fFormats.fExternalType = GR_GL_UNSIGNED_BYTE; fConfigTable[kSRGBA_8888_GrPixelConfig].fFormatType = kNormalizedFixedPoint_FormatType; if (fSRGBSupport) { fConfigTable[kSRGBA_8888_GrPixelConfig].fFlags = ConfigInfo::kTextureable_Flag | srgbRenderFlags; } // ES2 Command Buffer does not allow TexStorage with SRGB8_ALPHA8_EXT if (texStorageSupported && !isCommandBufferES2) { fConfigTable[kSRGBA_8888_GrPixelConfig].fFlags |= ConfigInfo::kCanUseTexStorage_Flag; } fConfigTable[kSRGBA_8888_GrPixelConfig].fSwizzle = GrSwizzle::RGBA(); // sBGRA is not a "real" thing in OpenGL, but GPUs support it, and on platforms where // kN32 == BGRA, we need some way to work with it. (The default framebuffer on Windows // is in this format, for example). fConfigTable[kSBGRA_8888_GrPixelConfig].fFormats.fBaseInternalFormat = GR_GL_SRGB_ALPHA; fConfigTable[kSBGRA_8888_GrPixelConfig].fFormats.fSizedInternalFormat = GR_GL_SRGB8_ALPHA8; // GL does not do srgb<->rgb conversions when transferring between cpu and gpu. Thus, the // external format is GL_BGRA. fConfigTable[kSBGRA_8888_GrPixelConfig].fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage] = GR_GL_BGRA; fConfigTable[kSBGRA_8888_GrPixelConfig].fFormats.fExternalType = GR_GL_UNSIGNED_BYTE; fConfigTable[kSBGRA_8888_GrPixelConfig].fFormatType = kNormalizedFixedPoint_FormatType; if (fSRGBSupport && kGL_GrGLStandard == standard) { fConfigTable[kSBGRA_8888_GrPixelConfig].fFlags = ConfigInfo::kTextureable_Flag | srgbRenderFlags; } if (texStorageSupported) { fConfigTable[kSBGRA_8888_GrPixelConfig].fFlags |= ConfigInfo::kCanUseTexStorage_Flag; } fConfigTable[kSBGRA_8888_GrPixelConfig].fSwizzle = GrSwizzle::RGBA(); fConfigTable[kRGB_565_GrPixelConfig].fFormats.fBaseInternalFormat = GR_GL_RGB; if (this->ES2CompatibilitySupport()) { fConfigTable[kRGB_565_GrPixelConfig].fFormats.fSizedInternalFormat = GR_GL_RGB565; } else { fConfigTable[kRGB_565_GrPixelConfig].fFormats.fSizedInternalFormat = GR_GL_RGB5; } fConfigTable[kRGB_565_GrPixelConfig].fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage] = GR_GL_RGB; fConfigTable[kRGB_565_GrPixelConfig].fFormats.fExternalType = GR_GL_UNSIGNED_SHORT_5_6_5; fConfigTable[kRGB_565_GrPixelConfig].fFormatType = kNormalizedFixedPoint_FormatType; fConfigTable[kRGB_565_GrPixelConfig].fFlags = ConfigInfo::kTextureable_Flag; if (kGL_GrGLStandard == standard) { if (version >= GR_GL_VER(4, 2) || ctxInfo.hasExtension("GL_ARB_ES2_compatibility")) { fConfigTable[kRGB_565_GrPixelConfig].fFlags |= allRenderFlags; } } else { fConfigTable[kRGB_565_GrPixelConfig].fFlags |= allRenderFlags; } // 565 is not a sized internal format on desktop GL. So on desktop with // 565 we always use an unsized internal format to let the system pick // the best sized format to convert the 565 data to. Since TexStorage // only allows sized internal formats we disallow it. // // TODO: As of 4.2, regular GL supports 565. This logic is due for an // update. if (texStorageSupported && kGL_GrGLStandard != standard) { fConfigTable[kRGB_565_GrPixelConfig].fFlags |= ConfigInfo::kCanUseTexStorage_Flag; } fConfigTable[kRGB_565_GrPixelConfig].fSwizzle = GrSwizzle::RGBA(); fConfigTable[kRGBA_4444_GrPixelConfig].fFormats.fBaseInternalFormat = GR_GL_RGBA; fConfigTable[kRGBA_4444_GrPixelConfig].fFormats.fSizedInternalFormat = GR_GL_RGBA4; fConfigTable[kRGBA_4444_GrPixelConfig].fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage] = GR_GL_RGBA; fConfigTable[kRGBA_4444_GrPixelConfig].fFormats.fExternalType = GR_GL_UNSIGNED_SHORT_4_4_4_4; fConfigTable[kRGBA_4444_GrPixelConfig].fFormatType = kNormalizedFixedPoint_FormatType; fConfigTable[kRGBA_4444_GrPixelConfig].fFlags = ConfigInfo::kTextureable_Flag; if (kGL_GrGLStandard == standard) { if (version >= GR_GL_VER(4, 2)) { fConfigTable[kRGBA_4444_GrPixelConfig].fFlags |= allRenderFlags; } } else { fConfigTable[kRGBA_4444_GrPixelConfig].fFlags |= allRenderFlags; } if (texStorageSupported) { fConfigTable[kRGBA_4444_GrPixelConfig].fFlags |= ConfigInfo::kCanUseTexStorage_Flag; } fConfigTable[kRGBA_4444_GrPixelConfig].fSwizzle = GrSwizzle::RGBA(); fConfigTable[kRGBA_1010102_GrPixelConfig].fFormats.fBaseInternalFormat = GR_GL_RGBA; fConfigTable[kRGBA_1010102_GrPixelConfig].fFormats.fSizedInternalFormat = GR_GL_RGB10_A2; fConfigTable[kRGBA_1010102_GrPixelConfig].fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage] = GR_GL_RGBA; fConfigTable[kRGBA_1010102_GrPixelConfig].fFormats.fExternalType = GR_GL_UNSIGNED_INT_2_10_10_10_REV; fConfigTable[kRGBA_1010102_GrPixelConfig].fFormatType = kNormalizedFixedPoint_FormatType; if (kGL_GrGLStandard == standard || version >= GR_GL_VER(3, 0)) { fConfigTable[kRGBA_1010102_GrPixelConfig].fFlags = ConfigInfo::kTextureable_Flag | allRenderFlags; } if (texStorageSupported) { fConfigTable[kRGBA_1010102_GrPixelConfig].fFlags |= ConfigInfo::kCanUseTexStorage_Flag; } if (texelBufferSupport) { fConfigTable[kRGBA_1010102_GrPixelConfig].fFlags |= ConfigInfo::kCanUseWithTexelBuffer_Flag; } fConfigTable[kRGBA_1010102_GrPixelConfig].fSwizzle = GrSwizzle::RGBA(); bool alpha8IsValidForGL = kGL_GrGLStandard == standard && (!fIsCoreProfile || version <= GR_GL_VER(3, 0)); ConfigInfo& alphaInfo = fConfigTable[kAlpha_8_as_Alpha_GrPixelConfig]; alphaInfo.fFormats.fExternalType = GR_GL_UNSIGNED_BYTE; alphaInfo.fFormatType = kNormalizedFixedPoint_FormatType; if (alpha8IsValidForGL || (kGL_GrGLStandard != standard && version < GR_GL_VER(3, 0))) { alphaInfo.fFlags = ConfigInfo::kTextureable_Flag; } alphaInfo.fFormats.fBaseInternalFormat = GR_GL_ALPHA; alphaInfo.fFormats.fSizedInternalFormat = GR_GL_ALPHA8; alphaInfo.fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage] = GR_GL_ALPHA; alphaInfo.fSwizzle = GrSwizzle::AAAA(); if (fAlpha8IsRenderable && alpha8IsValidForGL) { alphaInfo.fFlags |= allRenderFlags; } ConfigInfo& redInfo = fConfigTable[kAlpha_8_as_Red_GrPixelConfig]; redInfo.fFormats.fExternalType = GR_GL_UNSIGNED_BYTE; redInfo.fFormatType = kNormalizedFixedPoint_FormatType; redInfo.fFormats.fBaseInternalFormat = GR_GL_RED; redInfo.fFormats.fSizedInternalFormat = GR_GL_R8; redInfo.fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage] = GR_GL_RED; redInfo.fSwizzle = GrSwizzle::RRRR(); // ES2 Command Buffer does not allow TexStorage with R8_EXT (so Alpha_8 and Gray_8) if (texStorageSupported && !isCommandBufferES2) { if (!disableR8TexStorageForANGLEGL) { alphaInfo.fFlags |= ConfigInfo::kCanUseTexStorage_Flag; } redInfo.fFlags |= ConfigInfo::kCanUseTexStorage_Flag; } if (textureRedSupport) { redInfo.fFlags |= ConfigInfo::kTextureable_Flag | allRenderFlags; if (texelBufferSupport) { redInfo.fFlags |= ConfigInfo::kCanUseWithTexelBuffer_Flag; } fConfigTable[kAlpha_8_GrPixelConfig] = redInfo; } else { redInfo.fFlags = 0; fConfigTable[kAlpha_8_GrPixelConfig] = alphaInfo; } ConfigInfo& grayLumInfo = fConfigTable[kGray_8_as_Lum_GrPixelConfig]; grayLumInfo.fFormats.fExternalType = GR_GL_UNSIGNED_BYTE; grayLumInfo.fFormatType = kNormalizedFixedPoint_FormatType; grayLumInfo.fFormats.fBaseInternalFormat = GR_GL_LUMINANCE; grayLumInfo.fFormats.fSizedInternalFormat = GR_GL_LUMINANCE8; grayLumInfo.fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage] = GR_GL_LUMINANCE; grayLumInfo.fSwizzle = GrSwizzle::RGBA(); if ((standard == kGL_GrGLStandard && version <= GR_GL_VER(3, 0)) || (standard == kGLES_GrGLStandard && version < GR_GL_VER(3, 0))) { grayLumInfo.fFlags = ConfigInfo::kTextureable_Flag; } ConfigInfo& grayRedInfo = fConfigTable[kGray_8_as_Red_GrPixelConfig]; grayRedInfo.fFormats.fExternalType = GR_GL_UNSIGNED_BYTE; grayRedInfo.fFormatType = kNormalizedFixedPoint_FormatType; grayRedInfo.fFormats.fBaseInternalFormat = GR_GL_RED; grayRedInfo.fFormats.fSizedInternalFormat = GR_GL_R8; grayRedInfo.fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage] = GR_GL_RED; grayRedInfo.fSwizzle = GrSwizzle::RRRA(); grayRedInfo.fFlags = ConfigInfo::kTextureable_Flag; #if 0 // Leaving Gray8 as non-renderable, to keep things simple and match raster. Needs to be // updated to support Gray8_as_Lum and Gray8_as_red if this is ever enabled. if (this->textureRedSupport() || (kDesktop_ARB_MSFBOType == this->msFBOType() && ctxInfo.renderer() != kOSMesa_GrGLRenderer)) { // desktop ARB extension/3.0+ supports LUMINANCE8 as renderable. // However, osmesa fails if it used even when GL_ARB_framebuffer_object is present. // Core profile removes LUMINANCE8 support, but we should have chosen R8 in that case. fConfigTable[kGray_8_GrPixelConfig].fFlags |= allRenderFlags; } #endif if (texStorageSupported && !isCommandBufferES2) { if (!disableR8TexStorageForANGLEGL) { grayLumInfo.fFlags |= ConfigInfo::kCanUseTexStorage_Flag; } grayRedInfo.fFlags |= ConfigInfo::kCanUseTexStorage_Flag; } if (textureRedSupport) { if (texelBufferSupport) { grayRedInfo.fFlags |= ConfigInfo::kCanUseWithTexelBuffer_Flag; } fConfigTable[kGray_8_GrPixelConfig] = grayRedInfo; } else { grayRedInfo.fFlags = 0; fConfigTable[kGray_8_GrPixelConfig] = grayLumInfo; } // Check for [half] floating point texture support // NOTE: We disallow floating point textures on ES devices if linear filtering modes are not // supported. This is for simplicity, but a more granular approach is possible. Coincidentally, // [half] floating point textures became part of the standard in ES3.1 / OGL 3.0. bool hasFPTextures = false; bool hasHalfFPTextures = false; bool rgIsTexturable = false; // for now we don't support floating point MSAA on ES uint32_t fpRenderFlags = (kGL_GrGLStandard == standard) ? allRenderFlags : nonMSAARenderFlags; if (kGL_GrGLStandard == standard) { if (version >= GR_GL_VER(3, 0)) { hasFPTextures = true; hasHalfFPTextures = true; rgIsTexturable = true; } } else { if (version >= GR_GL_VER(3, 0)) { hasFPTextures = true; hasHalfFPTextures = true; rgIsTexturable = true; } else { if (ctxInfo.hasExtension("GL_OES_texture_float_linear") && ctxInfo.hasExtension("GL_OES_texture_float")) { hasFPTextures = true; } if (ctxInfo.hasExtension("GL_OES_texture_half_float_linear") && ctxInfo.hasExtension("GL_OES_texture_half_float")) { hasHalfFPTextures = true; } } } for (auto fpconfig : {kRGBA_float_GrPixelConfig, kRG_float_GrPixelConfig}) { const GrGLenum format = kRGBA_float_GrPixelConfig == fpconfig ? GR_GL_RGBA : GR_GL_RG; fConfigTable[fpconfig].fFormats.fBaseInternalFormat = format; fConfigTable[fpconfig].fFormats.fSizedInternalFormat = kRGBA_float_GrPixelConfig == fpconfig ? GR_GL_RGBA32F : GR_GL_RG32F; fConfigTable[fpconfig].fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage] = format; fConfigTable[fpconfig].fFormats.fExternalType = GR_GL_FLOAT; fConfigTable[fpconfig].fFormatType = kFloat_FormatType; if (hasFPTextures) { fConfigTable[fpconfig].fFlags = rgIsTexturable ? ConfigInfo::kTextureable_Flag : 0; // For now we only enable rendering to float on desktop, because on ES we'd have to // solve many precision issues and no clients actually want this yet. if (kGL_GrGLStandard == standard /* || version >= GR_GL_VER(3,2) || ctxInfo.hasExtension("GL_EXT_color_buffer_float")*/) { fConfigTable[fpconfig].fFlags |= fpRenderFlags; } } if (texStorageSupported) { fConfigTable[fpconfig].fFlags |= ConfigInfo::kCanUseTexStorage_Flag; } if (texelBufferSupport) { fConfigTable[fpconfig].fFlags |= ConfigInfo::kCanUseWithTexelBuffer_Flag; } fConfigTable[fpconfig].fSwizzle = GrSwizzle::RGBA(); } GrGLenum redHalfExternalType; if (kGL_GrGLStandard == ctxInfo.standard() || ctxInfo.version() >= GR_GL_VER(3, 0)) { redHalfExternalType = GR_GL_HALF_FLOAT; } else { redHalfExternalType = GR_GL_HALF_FLOAT_OES; } ConfigInfo& redHalf = fConfigTable[kAlpha_half_as_Red_GrPixelConfig]; redHalf.fFormats.fExternalType = redHalfExternalType; redHalf.fFormatType = kFloat_FormatType; redHalf.fFormats.fBaseInternalFormat = GR_GL_RED; redHalf.fFormats.fSizedInternalFormat = GR_GL_R16F; redHalf.fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage] = GR_GL_RED; redHalf.fSwizzle = GrSwizzle::RRRR(); if (textureRedSupport && hasHalfFPTextures) { redHalf.fFlags = ConfigInfo::kTextureable_Flag; if (kGL_GrGLStandard == standard || version >= GR_GL_VER(3, 2) || (textureRedSupport && ctxInfo.hasExtension("GL_EXT_color_buffer_half_float"))) { redHalf.fFlags |= fpRenderFlags; } if (texStorageSupported && !isCommandBufferES2) { redHalf.fFlags |= ConfigInfo::kCanUseTexStorage_Flag; } if (texelBufferSupport) { redHalf.fFlags |= ConfigInfo::kCanUseWithTexelBuffer_Flag; } } fConfigTable[kAlpha_half_GrPixelConfig] = redHalf; fConfigTable[kRGBA_half_GrPixelConfig].fFormats.fBaseInternalFormat = GR_GL_RGBA; fConfigTable[kRGBA_half_GrPixelConfig].fFormats.fSizedInternalFormat = GR_GL_RGBA16F; fConfigTable[kRGBA_half_GrPixelConfig].fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage] = GR_GL_RGBA; if (kGL_GrGLStandard == ctxInfo.standard() || ctxInfo.version() >= GR_GL_VER(3, 0)) { fConfigTable[kRGBA_half_GrPixelConfig].fFormats.fExternalType = GR_GL_HALF_FLOAT; } else { fConfigTable[kRGBA_half_GrPixelConfig].fFormats.fExternalType = GR_GL_HALF_FLOAT_OES; } fConfigTable[kRGBA_half_GrPixelConfig].fFormatType = kFloat_FormatType; if (hasHalfFPTextures) { fConfigTable[kRGBA_half_GrPixelConfig].fFlags = ConfigInfo::kTextureable_Flag; // ES requires 3.2 or EXT_color_buffer_half_float. if (kGL_GrGLStandard == standard || version >= GR_GL_VER(3,2) || ctxInfo.hasExtension("GL_EXT_color_buffer_half_float")) { fConfigTable[kRGBA_half_GrPixelConfig].fFlags |= fpRenderFlags; } } if (texStorageSupported) { fConfigTable[kRGBA_half_GrPixelConfig].fFlags |= ConfigInfo::kCanUseTexStorage_Flag; } if (texelBufferSupport) { fConfigTable[kRGBA_half_GrPixelConfig].fFlags |= ConfigInfo::kCanUseWithTexelBuffer_Flag; } fConfigTable[kRGBA_half_GrPixelConfig].fSwizzle = GrSwizzle::RGBA(); // Bulk populate the texture internal/external formats here and then deal with exceptions below. // ES 2.0 requires that the internal/external formats match. bool useSizedTexFormats = (kGL_GrGLStandard == ctxInfo.standard() || ctxInfo.version() >= GR_GL_VER(3,0)); // All ES versions (thus far) require sized internal formats for render buffers. // TODO: Always use sized internal format? bool useSizedRbFormats = kGLES_GrGLStandard == ctxInfo.standard(); for (int i = 0; i < kGrPixelConfigCnt; ++i) { // Almost always we want to pass fExternalFormat[kReadPixels_ExternalFormatUsage] as the // param to glTex[Sub]Image. fConfigTable[i].fFormats.fExternalFormat[kTexImage_ExternalFormatUsage] = fConfigTable[i].fFormats.fExternalFormat[kReadPixels_ExternalFormatUsage]; fConfigTable[i].fFormats.fInternalFormatTexImage = useSizedTexFormats ? fConfigTable[i].fFormats.fSizedInternalFormat : fConfigTable[i].fFormats.fBaseInternalFormat; fConfigTable[i].fFormats.fInternalFormatRenderbuffer = useSizedRbFormats ? fConfigTable[i].fFormats.fSizedInternalFormat : fConfigTable[i].fFormats.fBaseInternalFormat; } // If we're on ES 3.0+ but because of a driver workaround selected GL_ALPHA to implement the // kAlpha_8_GrPixelConfig then we actually have to use a base internal format rather than a // sized internal format. This is because there is no valid 8 bit alpha sized internal format // in ES. if (useSizedTexFormats && kGLES_GrGLStandard == ctxInfo.standard() && !textureRedSupport) { SkASSERT(fConfigTable[kAlpha_8_GrPixelConfig].fFormats.fBaseInternalFormat == GR_GL_ALPHA8); SkASSERT(fConfigTable[kAlpha_8_as_Alpha_GrPixelConfig].fFormats.fBaseInternalFormat == GR_GL_ALPHA8); fConfigTable[kAlpha_8_GrPixelConfig].fFormats.fInternalFormatTexImage = fConfigTable[kAlpha_8_GrPixelConfig].fFormats.fBaseInternalFormat; fConfigTable[kAlpha_8_as_Alpha_GrPixelConfig].fFormats.fInternalFormatTexImage = fConfigTable[kAlpha_8_as_Alpha_GrPixelConfig].fFormats.fBaseInternalFormat; } // OpenGL ES 2.0 + GL_EXT_sRGB allows GL_SRGB_ALPHA to be specified as the // param to Tex(Sub)Image. ES 2.0 requires the and params to match. // Thus, on ES 2.0 we will use GL_SRGB_ALPHA as the param. // On OpenGL and ES 3.0+ GL_SRGB_ALPHA does not work for the param to glTexImage. if (ctxInfo.standard() == kGLES_GrGLStandard && ctxInfo.version() == GR_GL_VER(2,0)) { fConfigTable[kSRGBA_8888_GrPixelConfig].fFormats.fExternalFormat[kTexImage_ExternalFormatUsage] = GR_GL_SRGB_ALPHA; // Additionally, because we had to "invent" sBGRA, there is no way to make it work // in ES 2.0, because there is no we can use. So just make that format // unsupported. (If we have no sRGB support at all, this will get overwritten below). fConfigTable[kSBGRA_8888_GrPixelConfig].fFlags = 0; } // On ES 2.0 we have to use GL_RGB with glTexImage as the internal/external formats must // be the same. Moreover, if we write kRGB_888x data to a texture format on non-ES2 we want to // be sure that we write 1 for alpha not whatever happens to be in the client provided the 'x' // slot. fConfigTable[kRGB_888_GrPixelConfig].fFormats.fExternalFormat[kTexImage_ExternalFormatUsage] = GR_GL_RGB; // If BGRA is supported as an internal format it must always be specified to glTex[Sub]Image // as a base format. // GL_EXT_texture_format_BGRA8888: // This extension GL_BGRA as an unsized internal format. However, it is written against ES // 2.0 and therefore doesn't define a value for GL_BGRA8 as ES 2.0 uses unsized internal // formats. // GL_APPLE_texture_format_BGRA8888: // ES 2.0: the extension makes BGRA an external format but not an internal format. // ES 3.0: the extension explicitly states GL_BGRA8 is not a valid internal format for // glTexImage (just for glTexStorage). if (useSizedTexFormats && this->bgraIsInternalFormat()) { fConfigTable[kBGRA_8888_GrPixelConfig].fFormats.fInternalFormatTexImage = GR_GL_BGRA; } // If we don't have texture swizzle support then the shader generator must insert the // swizzle into shader code. if (!this->textureSwizzleSupport()) { for (int i = 0; i < kGrPixelConfigCnt; ++i) { shaderCaps->fConfigTextureSwizzle[i] = fConfigTable[i].fSwizzle; } } // Shader output swizzles will default to RGBA. When we've use GL_RED instead of GL_ALPHA to // implement kAlpha_8_GrPixelConfig we need to swizzle the shader outputs so the alpha channel // gets written to the single component. if (textureRedSupport) { for (int i = 0; i < kGrPixelConfigCnt; ++i) { GrPixelConfig config = static_cast(i); if (GrPixelConfigIsAlphaOnly(config) && fConfigTable[i].fFormats.fBaseInternalFormat == GR_GL_RED) { shaderCaps->fConfigOutputSwizzle[i] = GrSwizzle::AAAA(); } } } for (int i = 0; i < kGrPixelConfigCnt; ++i) { if (ConfigInfo::kRenderableWithMSAA_Flag & fConfigTable[i].fFlags) { // We assume that MSAA rendering is supported only if we support non-MSAA rendering. SkASSERT(ConfigInfo::kRenderable_Flag & fConfigTable[i].fFlags); if ((kGL_GrGLStandard == ctxInfo.standard() && (ctxInfo.version() >= GR_GL_VER(4,2) || ctxInfo.hasExtension("GL_ARB_internalformat_query"))) || (kGLES_GrGLStandard == ctxInfo.standard() && ctxInfo.version() >= GR_GL_VER(3,0))) { int count; GrGLenum format = fConfigTable[i].fFormats.fInternalFormatRenderbuffer; GR_GL_GetInternalformativ(gli, GR_GL_RENDERBUFFER, format, GR_GL_NUM_SAMPLE_COUNTS, 1, &count); if (count) { int* temp = new int[count]; GR_GL_GetInternalformativ(gli, GR_GL_RENDERBUFFER, format, GR_GL_SAMPLES, count, temp); // GL has a concept of MSAA rasterization with a single sample but we do not. if (count && temp[count - 1] == 1) { --count; SkASSERT(!count || temp[count -1] > 1); } fConfigTable[i].fColorSampleCounts.setCount(count+1); // We initialize our supported values with 1 (no msaa) and reverse the order // returned by GL so that the array is ascending. fConfigTable[i].fColorSampleCounts[0] = 1; for (int j = 0; j < count; ++j) { fConfigTable[i].fColorSampleCounts[j+1] = temp[count - j - 1]; } delete[] temp; } } else { // Fake out the table using some semi-standard counts up to the max allowed sample // count. int maxSampleCnt = 1; if (GrGLCaps::kES_IMG_MsToTexture_MSFBOType == fMSFBOType) { GR_GL_GetIntegerv(gli, GR_GL_MAX_SAMPLES_IMG, &maxSampleCnt); } else if (GrGLCaps::kNone_MSFBOType != fMSFBOType) { GR_GL_GetIntegerv(gli, GR_GL_MAX_SAMPLES, &maxSampleCnt); } // Chrome has a mock GL implementation that returns 0. maxSampleCnt = SkTMax(1, maxSampleCnt); static constexpr int kDefaultSamples[] = {1, 2, 4, 8}; int count = SK_ARRAY_COUNT(kDefaultSamples); for (; count > 0; --count) { if (kDefaultSamples[count - 1] <= maxSampleCnt) { break; } } if (count > 0) { fConfigTable[i].fColorSampleCounts.append(count, kDefaultSamples); } } } else if (ConfigInfo::kRenderable_Flag & fConfigTable[i].fFlags) { fConfigTable[i].fColorSampleCounts.setCount(1); fConfigTable[i].fColorSampleCounts[0] = 1; } } #ifdef SK_DEBUG // Make sure we initialized everything. ConfigInfo defaultEntry; for (int i = 0; i < kGrPixelConfigCnt; ++i) { // Make sure we didn't set renderable and not blittable or renderable with msaa and not // renderable. SkASSERT(!((fConfigTable[i].fFlags & ConfigInfo::kRenderable_Flag) && !(fConfigTable[i].fFlags & ConfigInfo::kFBOColorAttachment_Flag))); SkASSERT(!((fConfigTable[i].fFlags & ConfigInfo::kRenderableWithMSAA_Flag) && !(fConfigTable[i].fFlags & ConfigInfo::kRenderable_Flag))); SkASSERT(defaultEntry.fFormats.fBaseInternalFormat != fConfigTable[i].fFormats.fBaseInternalFormat); SkASSERT(defaultEntry.fFormats.fSizedInternalFormat != fConfigTable[i].fFormats.fSizedInternalFormat); for (int j = 0; j < kExternalFormatUsageCnt; ++j) { SkASSERT(defaultEntry.fFormats.fExternalFormat[j] != fConfigTable[i].fFormats.fExternalFormat[j]); } SkASSERT(defaultEntry.fFormats.fExternalType != fConfigTable[i].fFormats.fExternalType); } #endif } bool GrGLCaps::initDescForDstCopy(const GrRenderTargetProxy* src, GrSurfaceDesc* desc, GrSurfaceOrigin* origin, bool* rectsMustMatch, bool* disallowSubrect) const { // By default, we don't require rects to match. *rectsMustMatch = false; // By default, we allow subrects. *disallowSubrect = false; // If the src is a texture, we can implement the blit as a draw assuming the config is // renderable. if (src->asTextureProxy() && !this->isConfigRenderable(src->config())) { *origin = kBottomLeft_GrSurfaceOrigin; desc->fFlags = kRenderTarget_GrSurfaceFlag; desc->fConfig = src->config(); return true; } { // The only way we could see a non-GR_GL_TEXTURE_2D texture would be if it were // wrapped. In that case the proxy would already be instantiated. const GrTexture* srcTexture = src->priv().peekTexture(); const GrGLTexture* glSrcTexture = static_cast(srcTexture); if (glSrcTexture && glSrcTexture->target() != GR_GL_TEXTURE_2D) { // Not supported for FBO blit or CopyTexSubImage return false; } } // We look for opportunities to use CopyTexSubImage, or fbo blit. If neither are // possible and we return false to fallback to creating a render target dst for render-to- // texture. This code prefers CopyTexSubImage to fbo blit and avoids triggering temporary fbo // creation. It isn't clear that avoiding temporary fbo creation is actually optimal. GrSurfaceOrigin originForBlitFramebuffer = kTopLeft_GrSurfaceOrigin; bool rectsMustMatchForBlitFramebuffer = false; bool disallowSubrectForBlitFramebuffer = false; if (src->numColorSamples() > 1 && (this->blitFramebufferSupportFlags() & kResolveMustBeFull_BlitFrambufferFlag)) { rectsMustMatchForBlitFramebuffer = true; disallowSubrectForBlitFramebuffer = true; // Mirroring causes rects to mismatch later, don't allow it. originForBlitFramebuffer = src->origin(); } else if (src->numColorSamples() > 1 && (this->blitFramebufferSupportFlags() & kRectsMustMatchForMSAASrc_BlitFramebufferFlag)) { rectsMustMatchForBlitFramebuffer = true; // Mirroring causes rects to mismatch later, don't allow it. originForBlitFramebuffer = src->origin(); } else if (this->blitFramebufferSupportFlags() & kNoScalingOrMirroring_BlitFramebufferFlag) { originForBlitFramebuffer = src->origin(); } // Check for format issues with glCopyTexSubImage2D if (this->bgraIsInternalFormat() && kBGRA_8888_GrPixelConfig == src->config()) { // glCopyTexSubImage2D doesn't work with this config. If the bgra can be used with fbo blit // then we set up for that, otherwise fail. if (this->canConfigBeFBOColorAttachment(kBGRA_8888_GrPixelConfig)) { *origin = originForBlitFramebuffer; desc->fConfig = kBGRA_8888_GrPixelConfig; *rectsMustMatch = rectsMustMatchForBlitFramebuffer; *disallowSubrect = disallowSubrectForBlitFramebuffer; return true; } return false; } { bool srcIsMSAARenderbuffer = GrFSAAType::kUnifiedMSAA == src->fsaaType() && this->usesMSAARenderBuffers(); if (srcIsMSAARenderbuffer) { // It's illegal to call CopyTexSubImage2D on a MSAA renderbuffer. Set up for FBO // blit or fail. if (this->canConfigBeFBOColorAttachment(src->config())) { *origin = originForBlitFramebuffer; desc->fConfig = src->config(); *rectsMustMatch = rectsMustMatchForBlitFramebuffer; *disallowSubrect = disallowSubrectForBlitFramebuffer; return true; } return false; } } // We'll do a CopyTexSubImage. Make the dst a plain old texture. *origin = src->origin(); desc->fConfig = src->config(); desc->fFlags = kNone_GrSurfaceFlags; return true; } void GrGLCaps::applyDriverCorrectnessWorkarounds(const GrGLContextInfo& ctxInfo, const GrContextOptions& contextOptions, GrShaderCaps* shaderCaps) { // A driver but on the nexus 6 causes incorrect dst copies when invalidate is called beforehand. // Thus we are blacklisting this extension for now on Adreno4xx devices. if (kAdreno4xx_GrGLRenderer == ctxInfo.renderer()) { fDiscardRenderTargetSupport = false; fInvalidateFBType = kNone_InvalidateFBType; } // glClearTexImage seems to have a bug in NVIDIA drivers that was fixed sometime between // 340.96 and 367.57. if (kGL_GrGLStandard == ctxInfo.standard() && ctxInfo.driver() == kNVIDIA_GrGLDriver && ctxInfo.driverVersion() < GR_GL_DRIVER_VER(367, 57, 0)) { fClearTextureSupport = false; } // Calling glClearTexImage crashes on the NexusPlayer. if (kPowerVRRogue_GrGLRenderer == ctxInfo.renderer()) { fClearTextureSupport = false; } // On at least some MacBooks, GLSL 4.0 geometry shaders break if we use invocations. #ifdef SK_BUILD_FOR_MAC if (shaderCaps->fGeometryShaderSupport) { shaderCaps->fGSInvocationsSupport = false; } #endif // Qualcomm driver @103.0 has been observed to crash compiling ccpr geometry // shaders. @127.0 is the earliest verified driver to not crash. if (kQualcomm_GrGLDriver == ctxInfo.driver() && ctxInfo.driverVersion() < GR_GL_DRIVER_VER(127, 0, 0)) { shaderCaps->fGeometryShaderSupport = false; } #if defined(__has_feature) #if defined(SK_BUILD_FOR_MAC) && __has_feature(thread_sanitizer) // See skbug.com/7058 fMapBufferType = kNone_MapBufferType; fMapBufferFlags = kNone_MapFlags; #endif #endif // We found that the Galaxy J5 with an Adreno 306 running 6.0.1 has a bug where // GL_INVALID_OPERATION thrown by glDrawArrays when using a buffer that was mapped. The same bug // did not reproduce on a Nexus7 2013 with a 320 running Android M with driver 127.0. It's // unclear whether this really affects a wide range of devices. if (ctxInfo.renderer() == kAdreno3xx_GrGLRenderer && ctxInfo.driverVersion() > GR_GL_DRIVER_VER(127, 0, 0)) { fMapBufferType = kNone_MapBufferType; fMapBufferFlags = kNone_MapFlags; } // TODO: re-enable for ANGLE if (kANGLE_GrGLDriver == ctxInfo.driver()) { fTransferBufferType = kNone_TransferBufferType; } // Using MIPs on this GPU seems to be a source of trouble. if (kPowerVR54x_GrGLRenderer == ctxInfo.renderer()) { fMipMapSupport = false; } if (kPowerVRRogue_GrGLRenderer == ctxInfo.renderer()) { // Temporarily disabling clip analytic fragments processors on Nexus player while we work // around a driver bug related to gl_FragCoord. // https://bugs.chromium.org/p/skia/issues/detail?id=7286 fMaxClipAnalyticFPs = 0; } #ifndef SK_BUILD_FOR_IOS if (kPowerVR54x_GrGLRenderer == ctxInfo.renderer() || kPowerVRRogue_GrGLRenderer == ctxInfo.renderer() || (kAdreno3xx_GrGLRenderer == ctxInfo.renderer() && ctxInfo.driver() != kChromium_GrGLDriver)) { fUseDrawToClearColor = true; } #endif // A lot of GPUs have trouble with full screen clears (skbug.com/7195) if (kAMDRadeonHD7xxx_GrGLRenderer == ctxInfo.renderer() || kAMDRadeonR9M4xx_GrGLRenderer == ctxInfo.renderer()) { fUseDrawToClearColor = true; } #ifdef SK_BUILD_FOR_MAC // crbug.com/768134 - On MacBook Pros, the Intel Iris Pro doesn't always perform // full screen clears // crbug.com/773107 - On MacBook Pros, a wide range of Intel GPUs don't always // perform full screen clears. // Update on 4/4/2018 - This appears to be fixed on driver 10.30.12 on a macOS 10.13.2 on a // Retina MBP Early 2015 with Iris 6100. It is possibly fixed on earlier drivers as well. if (kIntel_GrGLVendor == ctxInfo.vendor() && ctxInfo.driverVersion() < GR_GL_DRIVER_VER(10, 30, 12)) { fUseDrawToClearColor = true; } #endif // See crbug.com/755871. This could probably be narrowed to just partial clears as the driver // bugs seems to involve clearing too much and not skipping the clear. // See crbug.com/768134. This is also needed for full clears and was seen on an nVidia K620 // but only for D3D11 ANGLE. if (GrGLANGLEBackend::kD3D11 == ctxInfo.angleBackend()) { fUseDrawToClearColor = true; } if (kAdreno4xx_GrGLRenderer == ctxInfo.renderer()) { // This is known to be fixed sometime between driver 145.0 and 219.0 if (ctxInfo.driverVersion() <= GR_GL_DRIVER_VER(219, 0, 0)) { fUseDrawToClearStencilClip = true; } fDisallowTexSubImageForUnormConfigTexturesEverBoundToFBO = true; } // This was reproduced on the following configurations: // - A Galaxy J5 (Adreno 306) running Android 6 with driver 140.0 // - A Nexus 7 2013 (Adreno 320) running Android 5 with driver 104.0 // - A Nexus 7 2013 (Adreno 320) running Android 6 with driver 127.0 // - A Nexus 5 (Adreno 330) running Android 6 with driver 127.0 // and not produced on: // - A Nexus 7 2013 (Adreno 320) running Android 4 with driver 53.0 // The particular lines that get dropped from test images varies across different devices. if (kAdreno3xx_GrGLRenderer == ctxInfo.renderer() && ctxInfo.driverVersion() > GR_GL_DRIVER_VER(53, 0, 0)) { fRequiresCullFaceEnableDisableWhenDrawingLinesAfterNonLines = true; } // Our Chromebook with kPowerVRRogue_GrGLRenderer seems to crash when glDrawArraysInstanced is // given 1 << 15 or more instances. if (kPowerVRRogue_GrGLRenderer == ctxInfo.renderer()) { fMaxInstancesPerDrawArraysWithoutCrashing = 0x7fff; } // Texture uploads sometimes seem to be ignored to textures bound to FBOS on Tegra3. if (kTegra_PreK1_GrGLRenderer == ctxInfo.renderer()) { fDisallowTexSubImageForUnormConfigTexturesEverBoundToFBO = true; fUseDrawInsteadOfAllRenderTargetWrites = true; } if (kGL_GrGLStandard == ctxInfo.standard() && kIntel_GrGLVendor == ctxInfo.vendor() ) { fSampleShadingSupport = false; } #ifdef SK_BUILD_FOR_MAC static constexpr bool isMAC = true; #else static constexpr bool isMAC = false; #endif // We support manual mip-map generation (via iterative downsampling draw calls). This fixes // bugs on some cards/drivers that produce incorrect mip-maps for sRGB textures when using // glGenerateMipmap. Our implementation requires mip-level sampling control. Additionally, // it can be much slower (especially on mobile GPUs), so we opt-in only when necessary: if (fMipMapLevelAndLodControlSupport && (contextOptions.fDoManualMipmapping || (kIntel_GrGLVendor == ctxInfo.vendor()) || (kNVIDIA_GrGLDriver == ctxInfo.driver() && isMAC) || (kATI_GrGLVendor == ctxInfo.vendor()))) { fDoManualMipmapping = true; } // See http://crbug.com/710443 #ifdef SK_BUILD_FOR_MAC if (kIntel6xxx_GrGLRenderer == ctxInfo.renderer()) { fClearToBoundaryValuesIsBroken = true; } #endif if (kQualcomm_GrGLVendor == ctxInfo.vendor()) { fDrawArraysBaseVertexIsBroken = true; } // The ccpr vertex-shader implementation does not work on this platform. Only allow CCPR with // GS. if (kANGLE_GrGLRenderer == ctxInfo.renderer() && GrGLANGLERenderer::kSkylake == ctxInfo.angleRenderer()) { bool gsSupport = fShaderCaps->geometryShaderSupport(); #if GR_TEST_UTILS gsSupport &= !contextOptions.fSuppressGeometryShaders; #endif fBlacklistCoverageCounting = !gsSupport; } // Currently the extension is advertised but fb fetch is broken on 500 series Adrenos like the // Galaxy S7. // TODO: Once this is fixed we can update the check here to look at a driver version number too. if (kAdreno5xx_GrGLRenderer == ctxInfo.renderer()) { shaderCaps->fFBFetchSupport = false; } // Adreno GPUs have a tendency to drop tiles when there is a divide-by-zero in a shader shaderCaps->fDropsTileOnZeroDivide = kQualcomm_GrGLVendor == ctxInfo.vendor(); // On the NexusS and GalaxyNexus, the use of 'any' causes the compilation error "Calls to any // function that may require a gradient calculation inside a conditional block may return // undefined results". This appears to be an issue with the 'any' call since even the simple // "result=black; if (any()) result=white;" code fails to compile. This issue comes into play // from our GrTextureDomain processor. shaderCaps->fCanUseAnyFunctionInShader = kImagination_GrGLVendor != ctxInfo.vendor(); // Known issue on at least some Intel platforms: // http://code.google.com/p/skia/issues/detail?id=946 if (kIntel_GrGLVendor == ctxInfo.vendor()) { shaderCaps->fFragCoordConventionsExtensionString = nullptr; } if (kTegra_PreK1_GrGLRenderer == ctxInfo.renderer()) { // The Tegra3 compiler will sometimes never return if we have min(abs(x), 1.0), // so we must do the abs first in a separate expression. shaderCaps->fCanUseMinAndAbsTogether = false; // Tegra3 fract() seems to trigger undefined behavior for negative values, so we // must avoid this condition. shaderCaps->fCanUseFractForNegativeValues = false; } // On Intel GPU there is an issue where it reads the second argument to atan "- %s.x" as an int // thus must us -1.0 * %s.x to work correctly if (kIntel_GrGLVendor == ctxInfo.vendor()) { shaderCaps->fMustForceNegatedAtanParamToFloat = true; } // On some Intel GPUs there is an issue where the driver outputs bogus values in the shader // when floor and abs are called on the same line. Thus we must execute an Op between them to // make sure the compiler doesn't re-inline them even if we break the calls apart. if (kIntel_GrGLVendor == ctxInfo.vendor()) { shaderCaps->fMustDoOpBetweenFloorAndAbs = true; } // On Adreno devices with framebuffer fetch support, there is a bug where they always return // the original dst color when reading the outColor even after being written to. By using a // local outColor we can work around this bug. if (shaderCaps->fFBFetchSupport && kQualcomm_GrGLVendor == ctxInfo.vendor()) { shaderCaps->fRequiresLocalOutputColorForFBFetch = true; } // Newer Mali GPUs do incorrect static analysis in specific situations: If there is uniform // color, and that uniform contains an opaque color, and the output of the shader is only based // on that uniform plus soemthing un-trackable (like a texture read), the compiler will deduce // that the shader always outputs opaque values. In that case, it appears to remove the shader // based blending code it normally injects, turning SrcOver into Src. To fix this, we always // insert an extra bit of math on the uniform that confuses the compiler just enough... if (kMaliT_GrGLRenderer == ctxInfo.renderer()) { shaderCaps->fMustObfuscateUniformColor = true; } #ifdef SK_BUILD_FOR_WIN // Check for ANGLE on Windows, so we can workaround a bug in D3D itself (anglebug.com/2098). // // Basically, if a shader has a construct like: // // float x = someCondition ? someValue : 0; // float2 result = (0 == x) ? float2(x, x) // : float2(2 * x / x, 0); // // ... the compiler will produce an error 'NaN and infinity literals not allowed', even though // we've explicitly guarded the division with a check against zero. This manifests in much // more complex ways in some of our shaders, so we use this caps bit to add an epsilon value // to the denominator of divisions, even when we've added checks that the denominator isn't 0. if (kANGLE_GrGLDriver == ctxInfo.driver() || kChromium_GrGLDriver == ctxInfo.driver()) { shaderCaps->fMustGuardDivisionEvenAfterExplicitZeroCheck = true; } #endif // We've seen Adreno 3xx devices produce incorrect (flipped) values for gl_FragCoord, in some // (rare) situations. It's sporadic, and mostly on older drivers. It also seems to be the case // that the interpolation of vertex shader outputs is quite inaccurate. if (kAdreno3xx_GrGLRenderer == ctxInfo.renderer()) { shaderCaps->fCanUseFragCoord = false; shaderCaps->fInterpolantsAreInaccurate = true; } // gl_FragCoord has an incorrect subpixel offset on legacy Tegra hardware. if (kTegra_PreK1_GrGLRenderer == ctxInfo.renderer()) { shaderCaps->fCanUseFragCoord = false; } // On Mali G71, mediump ints don't appear capable of representing every integer beyond +/-2048. // (Are they implemented with fp16?) if (kARM_GrGLVendor == ctxInfo.vendor()) { shaderCaps->fIncompleteShortIntPrecision = true; } // Disabling advanced blend on various platforms with major known issues. We also block Chrome // for now until its own blacklists can be updated. if (kAdreno4xx_GrGLRenderer == ctxInfo.renderer() || kAdreno5xx_GrGLRenderer == ctxInfo.renderer() || kIntel_GrGLDriver == ctxInfo.driver() || kChromium_GrGLDriver == ctxInfo.driver()) { fBlendEquationSupport = kBasic_BlendEquationSupport; shaderCaps->fAdvBlendEqInteraction = GrShaderCaps::kNotSupported_AdvBlendEqInteraction; } // Non-coherent advanced blend has an issue on NVIDIA pre 337.00. if (kNVIDIA_GrGLDriver == ctxInfo.driver() && ctxInfo.driverVersion() < GR_GL_DRIVER_VER(337, 00, 0) && kAdvanced_BlendEquationSupport == fBlendEquationSupport) { fBlendEquationSupport = kBasic_BlendEquationSupport; shaderCaps->fAdvBlendEqInteraction = GrShaderCaps::kNotSupported_AdvBlendEqInteraction; } if (this->advancedBlendEquationSupport()) { if (kNVIDIA_GrGLDriver == ctxInfo.driver() && ctxInfo.driverVersion() < GR_GL_DRIVER_VER(355, 00, 0)) { // Blacklist color-dodge and color-burn on pre-355.00 NVIDIA. fAdvBlendEqBlacklist |= (1 << kColorDodge_GrBlendEquation) | (1 << kColorBurn_GrBlendEquation); } if (kARM_GrGLVendor == ctxInfo.vendor()) { // Blacklist color-burn on ARM until the fix is released. fAdvBlendEqBlacklist |= (1 << kColorBurn_GrBlendEquation); } } // Workaround NVIDIA bug related to glInvalidateFramebuffer and mixed samples. if (fMultisampleDisableSupport && this->shaderCaps()->dualSourceBlendingSupport() && this->shaderCaps()->pathRenderingSupport() && fUsesMixedSamples && #if GR_TEST_UTILS (contextOptions.fGpuPathRenderers & GpuPathRenderers::kStencilAndCover) && #endif (kNVIDIA_GrGLDriver == ctxInfo.driver() || kChromium_GrGLDriver == ctxInfo.driver())) { fDiscardRenderTargetSupport = false; fInvalidateFBType = kNone_InvalidateFBType; } // Various Samsung devices (Note4, S7, ...) don't advertise the image_external_essl3 extension, // (only the base image_external extension), but do support it, and require that it be enabled // to work with ESSL3. This has been seen on both Mali and Adreno devices. skbug.com/7713 if (ctxInfo.hasExtension("GL_OES_EGL_image_external") && ctxInfo.glslGeneration() >= k330_GrGLSLGeneration && !shaderCaps->fExternalTextureSupport && // i.e. Missing the _essl3 extension (kARM_GrGLVendor == ctxInfo.vendor() || kQualcomm_GrGLVendor == ctxInfo.vendor())) { shaderCaps->fExternalTextureSupport = true; shaderCaps->fExternalTextureExtensionString = "GL_OES_EGL_image_external_essl3"; } } void GrGLCaps::onApplyOptionsOverrides(const GrContextOptions& options) { if (options.fDisableDriverCorrectnessWorkarounds) { SkASSERT(!fDoManualMipmapping); SkASSERT(!fClearToBoundaryValuesIsBroken); SkASSERT(0 == fMaxInstancesPerDrawArraysWithoutCrashing); SkASSERT(!fDrawArraysBaseVertexIsBroken); SkASSERT(!fUseDrawToClearColor); SkASSERT(!fUseDrawToClearStencilClip); SkASSERT(!fDisallowTexSubImageForUnormConfigTexturesEverBoundToFBO); SkASSERT(!fUseDrawInsteadOfAllRenderTargetWrites); SkASSERT(!fRequiresCullFaceEnableDisableWhenDrawingLinesAfterNonLines); } if (GrContextOptions::Enable::kNo == options.fUseDrawInsteadOfGLClear) { fUseDrawToClearColor = false; } else if (GrContextOptions::Enable::kYes == options.fUseDrawInsteadOfGLClear) { fUseDrawToClearColor = true; } if (options.fDoManualMipmapping) { fDoManualMipmapping = true; } } bool GrGLCaps::surfaceSupportsWritePixels(const GrSurface* surface) const { if (fDisallowTexSubImageForUnormConfigTexturesEverBoundToFBO) { if (auto tex = static_cast(surface->asTexture())) { if (tex->hasBaseLevelBeenBoundToFBO()) { return false; } } } if (auto rt = surface->asRenderTarget()) { if (fUseDrawInsteadOfAllRenderTargetWrites) { return false; } if (rt->numColorSamples() > 1 && this->usesMSAARenderBuffers()) { return false; } return SkToBool(surface->asTexture()); } return true; } bool GrGLCaps::surfaceSupportsReadPixels(const GrSurface* surface) const { if (auto tex = static_cast(surface->asTexture())) { // We don't support reading pixels directly from EXTERNAL textures as it would require // binding the texture to a FBO. if (tex->target() == GR_GL_TEXTURE_EXTERNAL) { return false; } } return true; } GrColorType GrGLCaps::supportedReadPixelsColorType(GrPixelConfig config, GrColorType dstColorType) const { // For now, we mostly report the read back format that is required by the ES spec without // checking for implementation allowed formats or consider laxer rules in non-ES GL. TODO: Relax // this as makes sense to increase performance and correctness. switch (fConfigTable[config].fFormatType) { case kNormalizedFixedPoint_FormatType: return GrColorType::kRGBA_8888; case kFloat_FormatType: // We cheat a little here and allow F16 read back if the src and dst match. if (kRGBA_half_GrPixelConfig == config && GrColorType::kRGBA_F16 == dstColorType) { return GrColorType::kRGBA_F16; } if ((kAlpha_half_GrPixelConfig == config || kAlpha_half_as_Red_GrPixelConfig == config) && GrColorType::kAlpha_F16 == dstColorType) { return GrColorType::kAlpha_F16; } // And similar for full float RG. if (kRG_float_GrPixelConfig == config && GrColorType::kRG_F32 == dstColorType) { return GrColorType::kRG_F32; } return GrColorType::kRGBA_F32; } return GrColorType::kUnknown; } bool GrGLCaps::onIsWindowRectanglesSupportedForRT(const GrBackendRenderTarget& backendRT) const { const GrGLFramebufferInfo* fbInfo = backendRT.getGLFramebufferInfo(); SkASSERT(fbInfo); // Window Rectangles are not supported for FBO 0; return fbInfo->fFBOID != 0; } int GrGLCaps::getRenderTargetSampleCount(int requestedCount, GrPixelConfig config) const { requestedCount = SkTMax(1, requestedCount); int count = fConfigTable[config].fColorSampleCounts.count(); if (!count) { return 0; } if (1 == requestedCount) { return fConfigTable[config].fColorSampleCounts[0] == 1 ? 1 : 0; } for (int i = 0; i < count; ++i) { if (fConfigTable[config].fColorSampleCounts[i] >= requestedCount) { return fConfigTable[config].fColorSampleCounts[i]; } } return 0; } int GrGLCaps::maxRenderTargetSampleCount(GrPixelConfig config) const { const auto& table = fConfigTable[config].fColorSampleCounts; if (!table.count()) { return 0; } return table[table.count() - 1]; } bool validate_sized_format(GrGLenum format, SkColorType ct, GrPixelConfig* config, GrGLStandard standard) { *config = kUnknown_GrPixelConfig; switch (ct) { case kUnknown_SkColorType: return false; case kAlpha_8_SkColorType: if (GR_GL_ALPHA8 == format) { *config = kAlpha_8_as_Alpha_GrPixelConfig; } else if (GR_GL_R8 == format) { *config = kAlpha_8_as_Red_GrPixelConfig; } break; case kRGB_565_SkColorType: if (GR_GL_RGB565 == format) { *config = kRGB_565_GrPixelConfig; } break; case kARGB_4444_SkColorType: if (GR_GL_RGBA4 == format) { *config = kRGBA_4444_GrPixelConfig; } break; case kRGBA_8888_SkColorType: if (GR_GL_RGBA8 == format) { *config = kRGBA_8888_GrPixelConfig; } else if (GR_GL_SRGB8_ALPHA8 == format) { *config = kSRGBA_8888_GrPixelConfig; } break; case kRGB_888x_SkColorType: if (GR_GL_RGB8 == format) { *config = kRGB_888_GrPixelConfig; } break; case kBGRA_8888_SkColorType: if (GR_GL_RGBA8 == format) { if (kGL_GrGLStandard == standard) { *config = kBGRA_8888_GrPixelConfig; } } else if (GR_GL_BGRA8 == format) { if (kGLES_GrGLStandard == standard) { *config = kBGRA_8888_GrPixelConfig; } } else if (GR_GL_SRGB8_ALPHA8 == format) { *config = kSBGRA_8888_GrPixelConfig; } break; case kRGBA_1010102_SkColorType: if (GR_GL_RGB10_A2 == format) { *config = kRGBA_1010102_GrPixelConfig; } break; case kRGB_101010x_SkColorType: return false; case kGray_8_SkColorType: if (GR_GL_LUMINANCE8 == format) { *config = kGray_8_as_Lum_GrPixelConfig; } else if (GR_GL_R8 == format) { *config = kGray_8_as_Red_GrPixelConfig; } break; case kRGBA_F16_SkColorType: if (GR_GL_RGBA16F == format) { *config = kRGBA_half_GrPixelConfig; } break; } return kUnknown_GrPixelConfig != *config; } bool GrGLCaps::validateBackendTexture(const GrBackendTexture& tex, SkColorType ct, GrPixelConfig* config) const { const GrGLTextureInfo* texInfo = tex.getGLTextureInfo(); if (!texInfo) { return false; } return validate_sized_format(texInfo->fFormat, ct, config, fStandard); } bool GrGLCaps::validateBackendRenderTarget(const GrBackendRenderTarget& rt, SkColorType ct, GrPixelConfig* config) const { const GrGLFramebufferInfo* fbInfo = rt.getGLFramebufferInfo(); if (!fbInfo) { return false; } return validate_sized_format(fbInfo->fFormat, ct, config, fStandard); } bool GrGLCaps::getConfigFromBackendFormat(const GrBackendFormat& format, SkColorType ct, GrPixelConfig* config) const { const GrGLenum* glFormat = format.getGLFormat(); if (!glFormat) { return false; } return validate_sized_format(*glFormat, ct, config, fStandard); }