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/*
* Copyright (C) 2012 Intel Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef GLPlatformSurface_h
#define GLPlatformSurface_h
#if USE(ACCELERATED_COMPOSITING)
#include "GLDefs.h"
#include "IntRect.h"
#include <wtf/Noncopyable.h>
// Encapsulates a surface that can be rendered to with GL, hiding platform
// specific management.
namespace WebCore {
class GLPlatformSurface {
WTF_MAKE_NONCOPYABLE(GLPlatformSurface);
public:
enum Attributes {
Default = 0x00, // No Alpha channel. Only R,G,B values set.
SupportAlpha = 0x01,
DoubleBuffered = 0x02
};
typedef unsigned SurfaceAttributes;
// Creates a GL surface used for offscreen rendering.
static PassOwnPtr<GLPlatformSurface> createOffScreenSurface(SurfaceAttributes = GLPlatformSurface::Default);
virtual ~GLPlatformSurface();
const IntRect& geometry() const;
// Get the underlying platform specific buffer handle.
// The handle will be null if surface doesn't support
// buffer sharing.
PlatformBufferHandle handle() const;
PlatformDrawable drawable() const;
PlatformDisplay sharedDisplay() const;
virtual SurfaceAttributes attributes() const;
virtual void swapBuffers();
virtual bool isCurrentDrawable() const;
virtual void onMakeCurrent();
// Convenience Function to update surface backbuffer with texture contents.
// Note that the function doesn't track or restore any GL states.
// Function does the following(in order):
// a) Blits texture contents to back buffer.
// b) Calls Swap Buffers.
virtual void updateContents(const uint32_t);
virtual void setGeometry(const IntRect&);
virtual PlatformSurfaceConfig configuration();
virtual void destroy();
protected:
GLPlatformSurface(SurfaceAttributes);
PlatformDisplay m_sharedDisplay;
PlatformDrawable m_drawable;
PlatformBufferHandle m_bufferHandle;
IntRect m_rect;
};
}
#endif
#endif
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