text: // Copyright 2017 The Dawn Authors
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  #ifndef DAWNNATIVE_OPENGL_SHADERMODULEGL_H_
  #define DAWNNATIVE_OPENGL_SHADERMODULEGL_H_
  
  #include "dawn/native/ShaderModule.h"
  
  #include "dawn/native/opengl/opengl_platform.h"
  
  namespace dawn::native::opengl {
  
      class Device;
      class PipelineLayout;
  
      std::string GetBindingName(BindGroupIndex group, BindingNumber bindingNumber);
  
      struct BindingLocation {
          BindGroupIndex group;
          BindingNumber binding;
      };
      bool operator<(const BindingLocation& a, const BindingLocation& b);
  
      struct CombinedSampler {
          BindingLocation samplerLocation;
          BindingLocation textureLocation;
          // OpenGL requires a sampler with texelFetch. If this is true, the developer did not provide
          // one and Dawn should bind a dummy non-filtering sampler. |samplerLocation| is unused.
          bool useDummySampler;
          std::string GetName() const;
      };
      bool operator<(const CombinedSampler& a, const CombinedSampler& b);
  
      using CombinedSamplerInfo = std::vector<CombinedSampler>;
  
      using BindingInfoArrayTable =
          std::unordered_map<std::string, std::unique_ptr<BindingInfoArray>>;
  
      class ShaderModule final : public ShaderModuleBase {
        public:
          static ResultOrError<Ref<ShaderModule>> Create(Device* device,
                                                         const ShaderModuleDescriptor* descriptor,
                                                         ShaderModuleParseResult* parseResult);
  
          ResultOrError<std::string> TranslateToGLSL(const char* entryPointName,
                                                     SingleShaderStage stage,
                                                     CombinedSamplerInfo* combinedSamplers,
                                                     const PipelineLayout* layout,
                                                     bool* needsDummySampler) const;
  
        private:
          ShaderModule(Device* device, const ShaderModuleDescriptor* descriptor);
          ~ShaderModule() override = default;
          MaybeError Initialize(ShaderModuleParseResult* parseResult);
      };
  
  }  // namespace dawn::native::opengl
  
  #endif  // DAWNNATIVE_OPENGL_SHADERMODULEGL_H_
  