GPU Program Caching

gpu/command_buffer/service/memory_program_cache.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// 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_MEMORY_program_cache_H_
+#define GPU_COMMAND_BUFFER_SERVICE_MEMORY_program_cache_H_
+
+#include "base/hash_tables.h"
+#include "gpu/command_buffer/service/program_cache.h"
+#include "gpu/command_buffer/service/program_cache_lru_helper.h"
+#include "gpu/command_buffer/service/shader_translator.h"
+#include "net/disk_cache/disk_cache.h"
+
+namespace {
+static const size_t kMaxMemoryCacheSizeBytes = 6*1024*1024;
+typedef std::map<std::string, GLint> BindAttribMap;
+} // anonymous namespace
+
+namespace gpu {
+namespace gles2 {
+
+// Program cache that stores binaries completely in-memory
+class GPU_EXPORT MemoryProgramCache : public ProgramCache {
+ public:
+  MemoryProgramCache()
+      : max_size_bytes_(kMaxMemoryCacheSizeBytes),
+        curr_size_bytes_(0) {}
+  virtual ~MemoryProgramCache();
+
+  bool LoadLinkedProgram(
+      const GLuint program,
+      ShaderManager::ShaderInfo* shader_a,
+      ShaderManager::ShaderInfo* shader_b,
+      const BindAttribMap* bind_attrib_location_map) const;
+  void SaveLinkedProgram(
+      const GLuint program,
+      const ShaderManager::ShaderInfo* shader_a,
+      const ShaderManager::ShaderInfo* shader_b,
+      const BindAttribMap* bind_attrib_location_map);
+
+ private:
+  void ClearBackend();
+
+  struct StoreValue {
+    StoreValue() : length(0), format(0), data(NULL) { }
+    StoreValue(GLsizei _length,
+               GLenum _format,
+               const GLvoid* _data,
+               const char* _shader_0_hash,
+               const ShaderTranslator::VariableMap& _attrib_map_0,
+               const ShaderTranslator::VariableMap& _uniform_map_0,
+               const char* _shader_1_hash,
+               const ShaderTranslator::VariableMap& _attrib_map_1,
+               const ShaderTranslator::VariableMap& _uniform_map_1)
+        : length(_length),
+          format(_format),
+          data(_data),
+          shader_0_hash(_shader_0_hash, kHashLength),
+          attrib_map_0(_attrib_map_0),
+          uniform_map_0(_uniform_map_0),
+          shader_1_hash(_shader_1_hash, kHashLength),
+          attrib_map_1(_attrib_map_1),
+          uniform_map_1(_uniform_map_1) { }
+    GLsizei length;
+    GLenum format;
+    const GLvoid* data;
+    std::string shader_0_hash;
+    ShaderTranslator::VariableMap attrib_map_0;
+    ShaderTranslator::VariableMap uniform_map_0;
+    std::string shader_1_hash;
+    ShaderTranslator::VariableMap attrib_map_1;
+    ShaderTranslator::VariableMap uniform_map_1;
+  };
+
+  typedef base::hash_map<std::string,
+                         StoreValue> StoreMap;
+
+  const size_t max_size_bytes_;
+  size_t curr_size_bytes_;
+  StoreMap store_;
+  ProgramCacheLruHelper lru_helper_;
+
+  DISALLOW_COPY_AND_ASSIGN(MemoryProgramCache);
+};
+
+} // namespace gles2
+} // namespace gpu
+
+#endif /* GPU_COMMAND_BUFFER_SERVICE_MEMORY_program_cache_H_ */