1 // Copyright 2017 The Dawn Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef DAWNNATIVE_OPENGL_SHADERMODULEGL_H_ 16 #define DAWNNATIVE_OPENGL_SHADERMODULEGL_H_ 17 18 #include "dawn_native/ShaderModule.h" 19 20 #include "dawn_native/opengl/opengl_platform.h" 21 22 namespace dawn_native { namespace opengl { 23 24 class Device; 25 class PipelineLayout; 26 27 std::string GetBindingName(BindGroupIndex group, BindingNumber bindingNumber); 28 29 struct BindingLocation { 30 BindGroupIndex group; 31 BindingNumber binding; 32 }; 33 bool operator<(const BindingLocation& a, const BindingLocation& b); 34 35 struct CombinedSampler { 36 BindingLocation samplerLocation; 37 BindingLocation textureLocation; 38 // OpenGL requires a sampler with texelFetch. If this is true, the developer did not provide 39 // one and Dawn should bind a dummy non-filtering sampler. |samplerLocation| is unused. 40 bool useDummySampler; 41 std::string GetName() const; 42 }; 43 bool operator<(const CombinedSampler& a, const CombinedSampler& b); 44 45 using CombinedSamplerInfo = std::vector<CombinedSampler>; 46 47 using BindingInfoArrayTable = 48 std::unordered_map<std::string, std::unique_ptr<BindingInfoArray>>; 49 50 class ShaderModule final : public ShaderModuleBase { 51 public: 52 static ResultOrError<Ref<ShaderModule>> Create(Device* device, 53 const ShaderModuleDescriptor* descriptor, 54 ShaderModuleParseResult* parseResult); 55 56 ResultOrError<std::string> TranslateToGLSL(const char* entryPointName, 57 SingleShaderStage stage, 58 CombinedSamplerInfo* combinedSamplers, 59 const PipelineLayout* layout, 60 bool* needsDummySampler) const; 61 62 private: 63 ShaderModule(Device* device, const ShaderModuleDescriptor* descriptor); 64 ~ShaderModule() override = default; 65 MaybeError Initialize(ShaderModuleParseResult* parseResult); 66 static ResultOrError<BindingInfoArrayTable> ReflectShaderUsingSPIRVCross( 67 DeviceBase* device, 68 const std::vector<uint32_t>& spirv); 69 70 BindingInfoArrayTable mGLBindings; 71 }; 72 73 }} // namespace dawn_native::opengl 74 75 #endif // DAWNNATIVE_OPENGL_SHADERMODULEGL_H_ 76