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      1 /*
      2  * Copyright 2011, The Android Open Source Project
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *  * Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  *  * Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef BaseRenderer_h
     27 #define BaseRenderer_h
     28 
     29 #if USE(ACCELERATED_COMPOSITING)
     30 
     31 #include "Color.h"
     32 #include "SkRect.h"
     33 #include <wtf/text/StringHash.h>
     34 
     35 class SkCanvas;
     36 class SkDevice;
     37 
     38 namespace WebCore {
     39 
     40 class TextureInfo;
     41 class TilePainter;
     42 class Tile;
     43 
     44 struct TileRenderInfo {
     45     // coordinates of the tile
     46     int x;
     47     int y;
     48 
     49     // current scale factor
     50     float scale;
     51 
     52     // the expected size of the tile
     53     SkSize tileSize;
     54 
     55     // the painter object in charge of drawing our content
     56     TilePainter* tilePainter;
     57 
     58     // the base tile calling us
     59     Tile* baseTile;
     60 
     61     // info about the texture that we are to render into
     62     TextureInfo* textureInfo;
     63 
     64     bool isPureColor;
     65     Color pureColor;
     66 };
     67 
     68 /**
     69  *
     70  */
     71 class BaseRenderer {
     72 public:
     73     enum RendererType { Raster, Ganesh };
     74     BaseRenderer(RendererType type) : m_type(type) {}
     75     virtual ~BaseRenderer() {}
     76 
     77     void renderTiledContent(TileRenderInfo& renderInfo);
     78 
     79     RendererType getType() { return m_type; }
     80 
     81     static BaseRenderer* createRenderer();
     82     static void swapRendererIfNeeded(BaseRenderer*& renderer);
     83     static RendererType getCurrentRendererType() { return g_currentType; }
     84     static void setCurrentRendererType(RendererType type) { g_currentType = type; }
     85 
     86 protected:
     87 
     88     virtual void setupCanvas(const TileRenderInfo& renderInfo, SkCanvas* canvas) = 0;
     89     virtual void renderingComplete(const TileRenderInfo& renderInfo, SkCanvas* canvas) = 0;
     90     virtual void checkForPureColor(TileRenderInfo& renderInfo, SkCanvas* canvas) = 0;
     91 
     92     void drawTileInfo(SkCanvas* canvas, const TileRenderInfo& renderInfo,
     93             int updateCount, double renderDuration);
     94 
     95 private:
     96     RendererType m_type;
     97     static RendererType g_currentType;
     98 };
     99 
    100 } // namespace WebCore
    101 
    102 #endif // USE(ACCELERATED_COMPOSITING)
    103 #endif // BaseRenderer_h
    104