1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef GPU_COMMAND_BUFFER_SERVICE_SHADER_TRANSLATOR_CACHE_H_ 6 #define GPU_COMMAND_BUFFER_SERVICE_SHADER_TRANSLATOR_CACHE_H_ 7 8 #include <string.h> 9 10 #include <map> 11 12 #include "base/memory/ref_counted.h" 13 #include "gpu/command_buffer/service/shader_translator.h" 14 #include "third_party/angle/include/GLSLANG/ShaderLang.h" 15 16 namespace gpu { 17 namespace gles2 { 18 19 // This class is not thread safe and can only be created and destroyed 20 // on a single thread. But it is safe to use two independent instances on two 21 // threads without synchronization. 22 // 23 // TODO(backer): Investigate using glReleaseShaderCompiler as an alternative to 24 // to this cache. 25 class GPU_EXPORT ShaderTranslatorCache 26 : public base::RefCounted<ShaderTranslatorCache>, 27 public NON_EXPORTED_BASE(ShaderTranslator::DestructionObserver) { 28 public: 29 ShaderTranslatorCache(); 30 31 // ShaderTranslator::DestructionObserver implementation 32 virtual void OnDestruct(ShaderTranslator* translator) OVERRIDE; 33 34 scoped_refptr<ShaderTranslator> GetTranslator( 35 ShShaderType shader_type, 36 ShShaderSpec shader_spec, 37 const ShBuiltInResources* resources, 38 ShaderTranslatorInterface::GlslImplementationType 39 glsl_implementation_type, 40 ShCompileOptions driver_bug_workarounds); 41 42 private: 43 friend class base::RefCounted<ShaderTranslatorCache>; 44 virtual ~ShaderTranslatorCache(); 45 46 // Parameters passed into ShaderTranslator::Init 47 struct ShaderTranslatorInitParams { 48 ShShaderType shader_type; 49 ShShaderSpec shader_spec; 50 ShBuiltInResources resources; 51 ShaderTranslatorInterface::GlslImplementationType 52 glsl_implementation_type; 53 ShCompileOptions driver_bug_workarounds; 54 ShaderTranslatorInitParamsShaderTranslatorInitParams55 ShaderTranslatorInitParams( 56 ShShaderType shader_type, 57 ShShaderSpec shader_spec, 58 const ShBuiltInResources& resources, 59 ShaderTranslatorInterface::GlslImplementationType 60 glsl_implementation_type, 61 ShCompileOptions driver_bug_workarounds) 62 : shader_type(shader_type), 63 shader_spec(shader_spec), 64 resources(resources), 65 glsl_implementation_type(glsl_implementation_type), 66 driver_bug_workarounds(driver_bug_workarounds) { 67 } 68 ShaderTranslatorInitParamsShaderTranslatorInitParams69 ShaderTranslatorInitParams(const ShaderTranslatorInitParams& params) { 70 memcpy(this, ¶ms, sizeof(*this)); 71 } 72 73 bool operator== (const ShaderTranslatorInitParams& params) const { 74 return memcmp(¶ms, this, sizeof(*this)) == 0; 75 } 76 77 bool operator< (const ShaderTranslatorInitParams& params) const { 78 return memcmp(¶ms, this, sizeof(*this)) < 0; 79 } 80 }; 81 82 typedef std::map<ShaderTranslatorInitParams, ShaderTranslator* > Cache; 83 Cache cache_; 84 85 DISALLOW_COPY_AND_ASSIGN(ShaderTranslatorCache); 86 }; 87 88 } // namespace gles2 89 } // namespace gpu 90 91 #endif // GPU_COMMAND_BUFFER_SERVICE_SHADER_TRANSLATOR_CACHE_H_ 92