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// 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_ID_MANAGER_H_
#define GPU_COMMAND_BUFFER_SERVICE_ID_MANAGER_H_
#include "base/basictypes.h"
#include "base/containers/hash_tables.h"
#include "gpu/command_buffer/service/gl_utils.h"
#include "gpu/gpu_export.h"
namespace gpu {
namespace gles2 {
// This class maps one set of ids to another.
//
// NOTE: To support shared resources an instance of this class will
// need to be shared by multiple GLES2Decoders.
class GPU_EXPORT IdManager {
public:
IdManager();
~IdManager();
// Maps a client_id to a service_id. Return false if the client_id or
// service_id are already mapped to something else.
bool AddMapping(GLuint client_id, GLuint service_id);
// Unmaps a pair of ids. Returns false if the pair were not previously mapped.
bool RemoveMapping(GLuint client_id, GLuint service_id);
// Gets the corresponding service_id for the given client_id.
// Returns false if there is no corresponding service_id.
bool GetServiceId(GLuint client_id, GLuint* service_id);
// Gets the corresponding client_id for the given service_id.
// Returns false if there is no corresponding client_id.
bool GetClientId(GLuint service_id, GLuint* client_id);
private:
typedef base::hash_map<GLuint, GLuint> MapType;
MapType id_map_;
DISALLOW_COPY_AND_ASSIGN(IdManager);
};
} // namespace gles2
} // namespace gpu
#endif // GPU_COMMAND_BUFFER_SERVICE_ID_MANAGER_H_
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