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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_BUFFER_MANAGER_H_
#define GPU_COMMAND_BUFFER_SERVICE_BUFFER_MANAGER_H_
#include <map>
#include "base/basictypes.h"
#include "base/ref_counted.h"
#include "gpu/command_buffer/service/gl_utils.h"
namespace gpu {
namespace gles2 {
// This class keeps track of the buffers and their sizes so we can do
// bounds checking.
//
// NOTE: To support shared resources an instance of this class will need to be
// shared by multiple GLES2Decoders.
class BufferManager {
public:
// Info about Buffers currently in the system.
class BufferInfo : public base::RefCounted<BufferInfo> {
public:
typedef scoped_refptr<BufferInfo> Ref;
explicit BufferInfo(GLuint buffer_id)
: buffer_id_(buffer_id),
size_(0) {
}
GLuint buffer_id() const {
return buffer_id_;
}
GLsizeiptr size() const {
return size_;
}
void set_size(GLsizeiptr size) {
size_ = size;
}
// Returns the maximum value in the buffer for the given range
// interpreted as the given type.
GLuint GetMaxValueForRange(GLuint offset, GLsizei count, GLenum type);
bool IsDeleted() {
return buffer_id_ == 0;
}
private:
friend class BufferManager;
friend class base::RefCounted<BufferInfo>;
~BufferInfo() { }
void MarkAsDeleted() {
buffer_id_ = 0;
}
GLuint buffer_id_;
GLsizeiptr size_;
};
BufferManager() { }
// Creates a BufferInfo for the given buffer.
void CreateBufferInfo(GLuint buffer_id);
// Gets the buffer info for the given buffer.
BufferInfo* GetBufferInfo(GLuint buffer_id);
// Removes a buffer info for the given buffer.
void RemoveBufferInfo(GLuint buffer_id);
private:
// Info for each buffer in the system.
// TODO(gman): Choose a faster container.
typedef std::map<GLuint, BufferInfo::Ref> BufferInfoMap;
BufferInfoMap buffer_infos_;
DISALLOW_COPY_AND_ASSIGN(BufferManager);
};
} // namespace gles2
} // namespace gpu
#endif // GPU_COMMAND_BUFFER_SERVICE_BUFFER_MANAGER_H_
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