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// Copyright (c) 2010 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_SHADER_MANAGER_H_
#define GPU_COMMAND_BUFFER_SERVICE_SHADER_MANAGER_H_
#include <map>
#include <string>
#include "base/basictypes.h"
#include "base/ref_counted.h"
#include "gpu/command_buffer/service/gl_utils.h"
namespace gpu {
namespace gles2 {
// Tracks the Shaders.
//
// NOTE: To support shared resources an instance of this class will
// need to be shared by multiple GLES2Decoders.
class ShaderManager {
public:
// This is used to keep the source code for a shader. This is because in order
// to emluate GLES2 the shaders will have to be re-written before passed to
// the underlying OpenGL. But, when the user calls glGetShaderSource they
// should get the source they passed in, not the re-written source.
class ShaderInfo : public base::RefCounted<ShaderInfo> {
public:
typedef scoped_refptr<ShaderInfo> Ref;
explicit ShaderInfo(GLuint shader_id)
: shader_id_(shader_id) {
}
void Update(const std::string& source) {
source_ = source;
}
const std::string& source() {
return source_;
}
bool IsDeleted() {
return shader_id_ == 0;
}
private:
friend class base::RefCounted<ShaderInfo>;
friend class ShaderManager;
~ShaderInfo() { }
void MarkAsDeleted() {
shader_id_ = 0;
}
// The shader this ShaderInfo is tracking.
GLuint shader_id_;
// The shader source as passed to glShaderSource.
std::string source_;
};
ShaderManager() {
}
// Creates a shader info for the given shader ID.
void CreateShaderInfo(GLuint shader_id);
// Gets an existing shader info for the given shader ID. Returns NULL if none
// exists.
ShaderInfo* GetShaderInfo(GLuint shader_id);
// Deletes the shader info for the given shader.
void RemoveShaderInfo(GLuint shader_id);
private:
// Info for each shader by service side shader Id.
typedef std::map<GLuint, ShaderInfo::Ref> ShaderInfoMap;
ShaderInfoMap shader_infos_;
DISALLOW_COPY_AND_ASSIGN(ShaderManager);
};
} // namespace gles2
} // namespace gpu
#endif // GPU_COMMAND_BUFFER_SERVICE_SHADER_MANAGER_H_
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