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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 "PerformanceMonitor.h"
     32 #include "SkRect.h"
     33 
     34 class SkCanvas;
     35 class SkDevice;
     36 
     37 namespace WebCore {
     38 
     39 class TextureInfo;
     40 class TilePainter;
     41 class BaseTile;
     42 
     43 struct TileRenderInfo {
     44     // coordinates of the tile
     45     int x;
     46     int y;
     47 
     48     // current scale factor
     49     float scale;
     50 
     51     // inval rectangle with coordinates in the tile's coordinate space
     52     SkIRect* invalRect;
     53 
     54     // the expected size of the tile
     55     SkSize tileSize;
     56 
     57     // the painter object in charge of drawing our content
     58     TilePainter* tilePainter;
     59 
     60     // the base tile calling us
     61     BaseTile* baseTile;
     62 
     63     // info about the texture that we are to render into
     64     TextureInfo* textureInfo;
     65 
     66     // specifies whether or not to measure the rendering performance
     67     bool measurePerf;
     68 };
     69 
     70 /**
     71  *
     72  */
     73 class BaseRenderer {
     74 public:
     75     enum RendererType { Raster, Ganesh };
     76     BaseRenderer(RendererType type) : m_type(type) {}
     77     virtual ~BaseRenderer() {}
     78 
     79     int renderTiledContent(const TileRenderInfo& renderInfo);
     80 
     81     RendererType getType() { return m_type; }
     82 
     83     static BaseRenderer* createRenderer();
     84     static void swapRendererIfNeeded(BaseRenderer*& renderer);
     85     static RendererType getCurrentRendererType() { return g_currentType; }
     86     static void setCurrentRendererType(RendererType type) { g_currentType = type; }
     87 
     88 protected:
     89 
     90     virtual void setupCanvas(const TileRenderInfo& renderInfo, SkCanvas* canvas) = 0;
     91     virtual void setupPartialInval(const TileRenderInfo& renderInfo, SkCanvas* canvas) {}
     92     virtual void renderingComplete(const TileRenderInfo& renderInfo, SkCanvas* canvas) = 0;
     93 
     94     void drawTileInfo(SkCanvas* canvas, const TileRenderInfo& renderInfo,
     95             int pictureCount);
     96 
     97     virtual const String* getPerformanceTags(int& tagCount) = 0;
     98 
     99     // Performance tracking
    100     PerformanceMonitor m_perfMon;
    101 
    102 private:
    103     RendererType m_type;
    104     static RendererType g_currentType;
    105 };
    106 
    107 } // namespace WebCore
    108 
    109 #endif // USE(ACCELERATED_COMPOSITING)
    110 #endif // BaseRenderer_h
    111