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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrGLBufferImpl_DEFINED
#define GrGLBufferImpl_DEFINED
#include "GrNoncopyable.h"
#include "gl/GrGLFunctions.h"
class GrGpuGL;
/**
* This class serves as the implementation of GrGL*Buffer classes. It was written to avoid code
* duplication in those classes.
*/
class GrGLBufferImpl : public GrNoncopyable {
public:
struct Desc {
bool fIsWrapped;
GrGLuint fID; // set to 0 to indicate buffer is CPU-backed and not a VBO.
size_t fSizeInBytes;
bool fDynamic;
};
GrGLBufferImpl(GrGpuGL*, const Desc&, GrGLenum bufferType);
~GrGLBufferImpl() {
// either release or abandon should have been called by the owner of this object.
GrAssert(0 == fDesc.fID);
}
void abandon();
void release(GrGpuGL* gpu);
GrGLuint bufferID() const { return fDesc.fID; }
size_t baseOffset() const { return reinterpret_cast<size_t>(fCPUData); }
void bind(GrGpuGL* gpu) const;
void* lock(GrGpuGL* gpu);
void* lockPtr() const { return fLockPtr; }
void unlock(GrGpuGL* gpu);
bool isLocked() const;
bool updateData(GrGpuGL* gpu, const void* src, size_t srcSizeInBytes);
private:
void validate() const;
Desc fDesc;
GrGLenum fBufferType; // GL_ARRAY_BUFFER or GL_ELEMENT_ARRAY_BUFFER
void* fCPUData;
void* fLockPtr;
typedef GrNoncopyable INHERITED;
};
#endif
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