2 * Copyright (C) 2011 Google Inc. All rights reserved.
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27 #ifndef LayerTextureUpdater_h
28 #define LayerTextureUpdater_h
30 #if USE(ACCELERATED_COMPOSITING)
32 #include "GraphicsTypes3D.h"
33 #include <wtf/Noncopyable.h>
37 class GraphicsContext3D;
42 class LayerTextureUpdater {
43 WTF_MAKE_NONCOPYABLE(LayerTextureUpdater);
45 LayerTextureUpdater() { }
46 virtual ~LayerTextureUpdater() { }
53 enum SampledTexelFormat {
54 SampledTexelFormatRGBA,
55 SampledTexelFormatBGRA,
56 SampledTexelFormatInvalid,
58 // Returns the orientation of the texture uploaded by this interface.
59 virtual Orientation orientation() = 0;
60 // Returns the format of the texel uploaded by this interface.
61 // This format should not be confused by texture internal format.
62 // This format specifies the component order in the sampled texel.
63 // If the format is TexelFormatBGRA, vec4.x is blue and vec4.z is red.
64 virtual SampledTexelFormat sampledTexelFormat(GC3Denum textureFormat) = 0;
65 virtual void prepareToUpdate(const IntRect& contentRect, const IntSize& tileSize, int borderTexels) = 0;
66 virtual void updateTextureRect(GraphicsContext3D*, ManagedTexture*, const IntRect& sourceRect, const IntRect& destRect) = 0;
69 } // namespace WebCore
70 #endif // USE(ACCELERATED_COMPOSITING)
71 #endif // LayerTextureUpdater_h