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// Copyright 2011 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 LayerTextureUpdater_h
#define LayerTextureUpdater_h
#if USE(ACCELERATED_COMPOSITING)
#include "CCPrioritizedTexture.h"
#include "GraphicsTypes3D.h"
#include <wtf/RefCounted.h>
namespace cc {
class IntRect;
class IntSize;
class TextureManager;
struct CCRenderingStats;
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 */, CCRenderingStats&) { }
virtual void updateRect(CCResourceProvider*, const IntRect& sourceRect, const IntSize& destOffset) = 0;
protected:
explicit Texture(PassOwnPtr<CCPrioritizedTexture> texture) : m_texture(texture) { }
private:
OwnPtr<CCPrioritizedTexture> m_texture;
};
LayerTextureUpdater()
{
turnOffVerifier(); // In the component build we don't have WTF threading initialized in this DLL so the thread verifier explodes.
}
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, CCRenderingStats&) { }
// Set true by the layer when it is known that the entire output is going to be opaque.
virtual void setOpaque(bool) { }
};
} // namespace cc
#endif // USE(ACCELERATED_COMPOSITING)
#endif // LayerTextureUpdater_h
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