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119 lines
3.6 KiB
C++
119 lines
3.6 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef GPU_COMMAND_BUFFER_SERVICE_PROGRAM_CACHE_H_
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#define GPU_COMMAND_BUFFER_SERVICE_PROGRAM_CACHE_H_
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#include <map>
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#include <string>
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#include "base/containers/hash_tables.h"
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#include "base/sha1.h"
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#include "gpu/command_buffer/common/gles2_cmd_format.h"
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#include "gpu/command_buffer/service/gles2_cmd_decoder.h"
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#include "gpu/command_buffer/service/shader_manager.h"
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namespace gpu {
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namespace gles2 {
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class Shader;
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// Program cache base class for caching linked gpu programs
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class GPU_EXPORT ProgramCache {
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public:
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static const size_t kHashLength = base::kSHA1Length;
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typedef std::map<std::string, GLint> LocationMap;
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enum LinkedProgramStatus {
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LINK_UNKNOWN,
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LINK_SUCCEEDED
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};
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enum ProgramLoadResult {
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PROGRAM_LOAD_FAILURE,
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PROGRAM_LOAD_SUCCESS
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};
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ProgramCache();
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virtual ~ProgramCache();
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LinkedProgramStatus GetLinkedProgramStatus(
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const std::string& shader_signature_a,
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const std::string& shader_signature_b,
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const LocationMap* bind_attrib_location_map,
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const std::vector<std::string>& transform_feedback_varyings,
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GLenum transform_feedback_buffer_mode) const;
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// Loads the linked program from the cache. If the program is not found or
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// there was an error, PROGRAM_LOAD_FAILURE should be returned.
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virtual ProgramLoadResult LoadLinkedProgram(
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GLuint program,
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Shader* shader_a,
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Shader* shader_b,
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const LocationMap* bind_attrib_location_map,
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const std::vector<std::string>& transform_feedback_varyings,
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GLenum transform_feedback_buffer_mode,
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const ShaderCacheCallback& shader_callback) = 0;
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// Saves the program into the cache. If successful, the implementation should
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// call LinkedProgramCacheSuccess.
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virtual void SaveLinkedProgram(
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GLuint program,
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const Shader* shader_a,
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const Shader* shader_b,
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const LocationMap* bind_attrib_location_map,
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const std::vector<std::string>& transform_feedback_varyings,
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GLenum transform_feedback_buffer_mode,
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const ShaderCacheCallback& shader_callback) = 0;
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virtual void LoadProgram(const std::string& program) = 0;
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// clears the cache
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void Clear();
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// Only for testing
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void LinkedProgramCacheSuccess(const std::string& shader_signature_a,
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const std::string& shader_signature_b,
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const LocationMap* bind_attrib_location_map,
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const std::vector<std::string>& transform_feedback_varyings,
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GLenum transform_feedback_buffer_mode);
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protected:
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// called by implementing class after a shader was successfully cached
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void LinkedProgramCacheSuccess(const std::string& program_hash);
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// result is not null terminated
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void ComputeShaderHash(const std::string& shader,
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char* result) const;
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// result is not null terminated. hashed shaders are expected to be
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// kHashLength in length
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void ComputeProgramHash(
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const char* hashed_shader_0,
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const char* hashed_shader_1,
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const LocationMap* bind_attrib_location_map,
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const std::vector<std::string>& transform_feedback_varyings,
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GLenum transform_feedback_buffer_mode,
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char* result) const;
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void Evict(const std::string& program_hash);
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private:
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typedef base::hash_map<std::string,
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LinkedProgramStatus> LinkStatusMap;
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// called to clear the backend cache
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virtual void ClearBackend() = 0;
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LinkStatusMap link_status_;
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DISALLOW_COPY_AND_ASSIGN(ProgramCache);
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};
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} // namespace gles2
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} // namespace gpu
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#endif // GPU_COMMAND_BUFFER_SERVICE_PROGRAM_CACHE_H_
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