1 /* 2 * Copyright 2019 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef GrSPIRVUniformHandler_DEFINED 9 #define GrSPIRVUniformHandler_DEFINED 10 11 #include "src/core/SkTBlockList.h" 12 #include "src/gpu/glsl/GrGLSLUniformHandler.h" 13 14 /* 15 * This class can be used for basic SPIR-V uniform handling. It will make a single uniform buffer 16 * for all the uniforms and will be placed in the first set and binding. Textures and samplers are 17 * placed in the second set and kept as separate objects. They are interleaved as sampler texture 18 * pairs with each object in the next binding slot. 19 */ 20 class GrSPIRVUniformHandler : public GrGLSLUniformHandler { 21 public: 22 static const int kUniformsPerBlock = 8; 23 24 const GrShaderVar& getUniformVariable(UniformHandle u) const override; 25 const char* getUniformCStr(UniformHandle u) const override; 26 27 struct SPIRVUniformInfo : public UniformInfo { 28 int fUBOOffset; 29 }; 30 typedef SkTBlockList<SPIRVUniformInfo> UniformInfoArray; 31 enum { 32 kUniformBinding = 0, 33 kUniformDescriptorSet = 0, 34 kSamplerTextureDescriptorSet = 1, 35 }; 36 uint32_t getRTFlipOffset() const; 37 numUniforms()38 int numUniforms() const override { 39 return fUniforms.count(); 40 } 41 uniform(int idx)42 UniformInfo& uniform(int idx) override { 43 return fUniforms.item(idx); 44 } uniform(int idx)45 const UniformInfo& uniform(int idx) const override { 46 return fUniforms.item(idx); 47 } 48 49 private: 50 explicit GrSPIRVUniformHandler(GrGLSLProgramBuilder* program); 51 52 SamplerHandle addSampler(const GrBackendFormat&, GrSamplerState, const GrSwizzle&, 53 const char* name, const GrShaderCaps*) override; 54 const char* samplerVariable(SamplerHandle handle) const override; 55 GrSwizzle samplerSwizzle(SamplerHandle handle) const override; 56 void appendUniformDecls(GrShaderFlags visibility, SkString*) const override; 57 UniformHandle internalAddUniformArray(const GrFragmentProcessor* owner, 58 uint32_t visibility, 59 GrSLType type, 60 const char* name, 61 bool mangleName, 62 int arrayCount, 63 const char** outName) override; 64 65 UniformInfoArray fUniforms; 66 UniformInfoArray fSamplers; 67 UniformInfoArray fTextures; 68 SkTArray<GrSwizzle> fSamplerSwizzles; 69 SkTArray<SkString> fSamplerReferences; 70 71 uint32_t fCurrentUBOOffset = 0; 72 uint32_t fRTFlipOffset = 0; 73 74 friend class GrD3DPipelineStateBuilder; 75 friend class GrDawnProgramBuilder; 76 77 using INHERITED = GrGLSLUniformHandler; 78 }; 79 80 #endif 81