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// Copyright 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 TextureCopier_h
#define TextureCopier_h
#include "base/basictypes.h"
#include "GraphicsContext3D.h"
#include "ProgramBinding.h"
#include "ShaderChromium.h"
#include <wtf/OwnPtr.h>
#include <wtf/PassOwnPtr.h>
namespace WebKit {
class WebGraphicsContext3D;
}
namespace cc {
class IntSize;
class TextureCopier {
public:
struct Parameters {
unsigned sourceTexture;
unsigned destTexture;
IntSize size;
};
// Copy the base level contents of |sourceTexture| to |destTexture|. Both texture objects
// must be complete and have a base level of |size| dimensions. The color formats do not need
// to match, but |destTexture| must have a renderable format.
virtual void copyTexture(Parameters) = 0;
virtual void flush() = 0;
virtual ~TextureCopier() { }
};
class AcceleratedTextureCopier : public TextureCopier {
public:
static PassOwnPtr<AcceleratedTextureCopier> create(WebKit::WebGraphicsContext3D* context, bool usingBindUniforms)
{
return adoptPtr(new AcceleratedTextureCopier(context, usingBindUniforms));
}
virtual ~AcceleratedTextureCopier();
virtual void copyTexture(Parameters) OVERRIDE;
virtual void flush() OVERRIDE;
protected:
AcceleratedTextureCopier(WebKit::WebGraphicsContext3D*, bool usingBindUniforms);
private:
typedef ProgramBinding<VertexShaderPosTexIdentity, FragmentShaderRGBATex> BlitProgram;
WebKit::WebGraphicsContext3D* m_context;
Platform3DObject m_fbo;
Platform3DObject m_positionBuffer;
OwnPtr<BlitProgram> m_blitProgram;
bool m_usingBindUniforms;
DISALLOW_COPY_AND_ASSIGN(AcceleratedTextureCopier);
};
}
#endif
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