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/*
* Copyright (C) 2011 Google Inc. 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 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 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 LayerTextureUpdater_h
#define LayerTextureUpdater_h
#if USE(ACCELERATED_COMPOSITING)
#include "GraphicsTypes3D.h"
#include "cc/CCPrioritizedTexture.h"
#include <wtf/RefCounted.h>
namespace WebCore {
class IntRect;
class IntSize;
class TextureManager;
class LayerTextureUpdater : public RefCounted<LayerTextureUpdater> {
public:
// Allows texture uploaders to store per-tile resources.
class Texture {
public:
virtual ~Texture() { }
CCPrioritizedTexture* texture() { return m_texture.get(); }
void swapTextureWith(OwnPtr<CCPrioritizedTexture>& texture) { m_texture.swap(texture); }
virtual void prepareRect(const IntRect& /* sourceRect */) { }
virtual void updateRect(CCResourceProvider*, const IntRect& sourceRect, const IntRect& destRect) = 0;
protected:
explicit Texture(PassOwnPtr<CCPrioritizedTexture> texture) : m_texture(texture) { }
private:
OwnPtr<CCPrioritizedTexture> m_texture;
};
virtual ~LayerTextureUpdater() { }
enum SampledTexelFormat {
SampledTexelFormatRGBA,
SampledTexelFormatBGRA,
SampledTexelFormatInvalid,
};
virtual PassOwnPtr<Texture> createTexture(CCPrioritizedTextureManager*) = 0;
// Returns the format of the texel uploaded by this interface.
// This format should not be confused by texture internal format.
// This format specifies the component order in the sampled texel.
// If the format is TexelFormatBGRA, vec4.x is blue and vec4.z is red.
virtual SampledTexelFormat sampledTexelFormat(GC3Denum textureFormat) = 0;
// The |resultingOpaqueRect| gives back a region of the layer that was painted opaque. If the layer is marked opaque in the updater,
// then this region should be ignored in preference for the entire layer's area.
virtual void prepareToUpdate(const IntRect& contentRect, const IntSize& tileSize, float contentsWidthScale, float contentsHeightScale, IntRect& resultingOpaqueRect) { }
// Set true by the layer when it is known that the entire output is going to be opaque.
virtual void setOpaque(bool) { }
};
} // namespace WebCore
#endif // USE(ACCELERATED_COMPOSITING)
#endif // LayerTextureUpdater_h
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