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      1 /*
      2  * Copyright 2010, 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 BaseLayerAndroid_h
     27 #define BaseLayerAndroid_h
     28 
     29 #include "Color.h"
     30 #include "GLWebViewState.h"
     31 #include "IntRect.h"
     32 #include "Layer.h"
     33 #include "PictureSet.h"
     34 #include "SkPicture.h"
     35 
     36 namespace WebCore {
     37 
     38 class BaseLayerAndroid : public Layer {
     39 
     40 public:
     41     enum ScrollState {
     42         NotScrolling = 0,
     43         Scrolling = 1,
     44         ScrollingFinishPaint = 2
     45     };
     46 
     47     BaseLayerAndroid();
     48     virtual ~BaseLayerAndroid();
     49 
     50 #if USE(ACCELERATED_COMPOSITING)
     51     void setBackgroundColor(Color& color) { m_color = color; }
     52     Color getBackgroundColor() { return m_color; }
     53 #endif
     54     void setContent(const android::PictureSet& src);
     55     android::PictureSet* content() { return &m_content; }
     56     // This method will paint using the current PictureSet onto
     57     // the passed canvas. We used it to paint the GL tiles as well as
     58     // WebView::copyBaseContentToPicture(), so a lock is necessary as
     59     // we are running in different threads.
     60     virtual bool drawCanvas(SkCanvas* canvas);
     61 
     62     void updateLayerPositions(SkRect& visibleRect);
     63     bool prepare(double currentTime, IntRect& viewRect,
     64                  SkRect& visibleRect, float scale);
     65     bool drawGL(IntRect& viewRect, SkRect& visibleRect, float scale);
     66 
     67     // rendering asset management
     68     void swapTiles();
     69     void setIsDrawing(bool isDrawing);
     70     void setIsPainting(Layer* drawingTree);
     71     void mergeInvalsInto(Layer* replacementTree);
     72     bool isReady();
     73 
     74 private:
     75 #if USE(ACCELERATED_COMPOSITING)
     76     void prefetchBasePicture(SkRect& viewport, float currentScale,
     77                              TiledPage* prefetchTiledPage, bool draw);
     78     bool prepareBasePictureInGL(SkRect& viewport, float scale, double currentTime);
     79     void drawBasePictureInGL();
     80 
     81     android::Mutex m_drawLock;
     82     Color m_color;
     83 #endif
     84     android::PictureSet m_content;
     85 
     86     ScrollState m_scrollState;
     87 };
     88 
     89 } // namespace WebCore
     90 
     91 #endif // BaseLayerAndroid_h
     92