1 // Copyright 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
6 #ifndef LayerTextureUpdater_h
7 #define LayerTextureUpdater_h
9 #if USE(ACCELERATED_COMPOSITING)
11 #include "CCPrioritizedTexture.h"
12 #include "GraphicsTypes3D.h"
13 #include <wtf/RefCounted.h>
20 struct CCRenderingStats
;
22 class LayerTextureUpdater
: public RefCounted
<LayerTextureUpdater
> {
24 // Allows texture uploaders to store per-tile resources.
29 CCPrioritizedTexture
* texture() { return m_texture
.get(); }
30 void swapTextureWith(scoped_ptr
<CCPrioritizedTexture
>& texture
) { m_texture
.swap(texture
); }
31 virtual void prepareRect(const IntRect
& /* sourceRect */, CCRenderingStats
&) { }
32 virtual void updateRect(CCResourceProvider
*, const IntRect
& sourceRect
, const IntSize
& destOffset
) = 0;
33 virtual bool backingResourceWasEvicted() const;
35 explicit Texture(scoped_ptr
<CCPrioritizedTexture
> texture
);
38 scoped_ptr
<CCPrioritizedTexture
> m_texture
;
43 turnOffVerifier(); // In the component build we don't have WTF threading initialized in this DLL so the thread verifier explodes.
46 virtual ~LayerTextureUpdater() { }
48 enum SampledTexelFormat
{
49 SampledTexelFormatRGBA
,
50 SampledTexelFormatBGRA
,
51 SampledTexelFormatInvalid
,
53 virtual PassOwnPtr
<Texture
> createTexture(CCPrioritizedTextureManager
*) = 0;
54 // Returns the format of the texel uploaded by this interface.
55 // This format should not be confused by texture internal format.
56 // This format specifies the component order in the sampled texel.
57 // If the format is TexelFormatBGRA, vec4.x is blue and vec4.z is red.
58 virtual SampledTexelFormat
sampledTexelFormat(GC3Denum textureFormat
) = 0;
59 // The |resultingOpaqueRect| gives back a region of the layer that was painted opaque. If the layer is marked opaque in the updater,
60 // then this region should be ignored in preference for the entire layer's area.
61 virtual void prepareToUpdate(const IntRect
& contentRect
, const IntSize
& tileSize
, float contentsWidthScale
, float contentsHeightScale
, IntRect
& resultingOpaqueRect
, CCRenderingStats
&) { }
63 // Set true by the layer when it is known that the entire output is going to be opaque.
64 virtual void setOpaque(bool) { }
68 #endif // USE(ACCELERATED_COMPOSITING)
69 #endif // LayerTextureUpdater_h