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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef GPU_COMMAND_BUFFER_SERVICE_SHADER_TRANSLATOR_CACHE_H_
#define GPU_COMMAND_BUFFER_SERVICE_SHADER_TRANSLATOR_CACHE_H_
#include <string.h>
#include <map>
#include "base/memory/ref_counted.h"
#include "gpu/command_buffer/service/shader_translator.h"
#include "gpu/config/gpu_preferences.h"
#include "third_party/angle/include/GLSLANG/ShaderLang.h"
namespace gpu {
struct GpuPreferences;
namespace gles2 {
// This class is not thread safe and can only be created and destroyed
// on a single thread. But it is safe to use two independent instances on two
// threads without synchronization.
//
// TODO(backer): Investigate using glReleaseShaderCompiler as an alternative to
// to this cache.
class GPU_GLES2_EXPORT ShaderTranslatorCache
: public ShaderTranslator::DestructionObserver {
public:
explicit ShaderTranslatorCache(const GpuPreferences& gpu_preferences);
ShaderTranslatorCache(const ShaderTranslatorCache&) = delete;
ShaderTranslatorCache& operator=(const ShaderTranslatorCache&) = delete;
~ShaderTranslatorCache() override;
// ShaderTranslator::DestructionObserver implementation
void OnDestruct(ShaderTranslator* translator) override;
scoped_refptr<ShaderTranslator> GetTranslator(
sh::GLenum shader_type,
ShShaderSpec shader_spec,
const ShBuiltInResources* resources,
ShShaderOutput shader_output_language,
const ShCompileOptions& driver_bug_workarounds);
private:
friend class ShaderTranslatorCacheTest_InitParamComparable_Test;
// Parameters passed into ShaderTranslator::Init
struct ShaderTranslatorInitParams {
sh::GLenum shader_type;
ShShaderSpec shader_spec;
ShBuiltInResources resources;
ShShaderOutput shader_output_language;
ShCompileOptions driver_bug_workarounds;
ShaderTranslatorInitParams(sh::GLenum shader_type,
ShShaderSpec shader_spec,
const ShBuiltInResources& resources,
ShShaderOutput shader_output_language,
const ShCompileOptions& driver_bug_workarounds) {
memset(this, 0, sizeof(*this));
this->shader_type = shader_type;
this->shader_spec = shader_spec;
this->resources = resources;
this->shader_output_language = shader_output_language;
this->driver_bug_workarounds = driver_bug_workarounds;
}
ShaderTranslatorInitParams(const ShaderTranslatorInitParams& params) {
memcpy(this, ¶ms, sizeof(*this));
}
bool operator== (const ShaderTranslatorInitParams& params) const {
return memcmp(¶ms, this, sizeof(*this)) == 0;
}
bool operator< (const ShaderTranslatorInitParams& params) const {
return memcmp(¶ms, this, sizeof(*this)) < 0;
}
private:
ShaderTranslatorInitParams() = delete;
ShaderTranslatorInitParams& operator=(const ShaderTranslatorInitParams&) =
delete;
};
const GpuPreferences gpu_preferences_;
typedef std::map<ShaderTranslatorInitParams, ShaderTranslator* > Cache;
Cache cache_;
};
} // namespace gles2
} // namespace gpu
#endif // GPU_COMMAND_BUFFER_SERVICE_SHADER_TRANSLATOR_CACHE_H_
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