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Diffstat (limited to 'Source/WebCore/platform/graphics/android/SurfaceBacking.h')
-rw-r--r-- | Source/WebCore/platform/graphics/android/SurfaceBacking.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/Source/WebCore/platform/graphics/android/SurfaceBacking.h b/Source/WebCore/platform/graphics/android/SurfaceBacking.h new file mode 100644 index 0000000..b04e462 --- /dev/null +++ b/Source/WebCore/platform/graphics/android/SurfaceBacking.h @@ -0,0 +1,86 @@ +/* + * Copyright 2011, The Android Open Source Project + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * 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 THE COPYRIGHT HOLDERS ``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 THE COPYRIGHT OWNER OR + * 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 SurfaceBacking_h +#define SurfaceBacking_h + +#include "SkRefCnt.h" +#include "TileGrid.h" + +namespace WebCore { + +class LayerAndroid; +class TexturesResult; +class TilePainter; + +class SurfaceBacking : public SkRefCnt { +// TODO: investigate webkit threadsafe ref counting +public: + SurfaceBacking(bool isBaseSurface); + ~SurfaceBacking(); + void prepareGL(GLWebViewState* state, bool allowZoom, + const IntRect& prepareArea, const IntRect& unclippedArea, + TilePainter* painter, bool aggressiveRendering); + void swapTiles(); + void drawGL(const IntRect& visibleArea, float opacity, + const TransformationMatrix* transform, bool aggressiveRendering, + const Color* background); + void markAsDirty(const SkRegion& dirtyArea); + void computeTexturesAmount(TexturesResult* result, LayerAndroid* layer); + void discardTextures() + { + m_frontTexture->discardTextures(); + m_backTexture->discardTextures(); + } + bool isReady() + { + return !m_zooming && m_frontTexture->isReady() && m_scale > 0; + } + + int nbTextures(IntRect& area, float scale) + { + // TODO: consider the zooming case for the backTexture + if (!m_frontTexture) + return 0; + return m_frontTexture->nbTextures(area, scale); + } + +private: + void swapTileGrids(); + + // Delay before we schedule a new tile at the new scale factor + static const double s_zoomUpdateDelay = 0.2; // 200 ms + + TileGrid* m_frontTexture; + TileGrid* m_backTexture; + float m_scale; + float m_futureScale; + double m_zoomUpdateTime; + bool m_zooming; +}; + +} // namespace WebCore + +#endif // SurfaceBacking_h |