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      1 /*
      2  * Copyright (C) 2011 Google Inc. All rights reserved.
      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  * 1.  Redistributions of source code must retain the above copyright
      8  *     notice, this list of conditions and the following disclaimer.
      9  * 2.  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 APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     16  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     17  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     18  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     19  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
     20  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     22  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     23  */
     24 
     25 #ifndef CCHeadsUpDisplay_h
     26 #define CCHeadsUpDisplay_h
     27 
     28 #if USE(ACCELERATED_COMPOSITING)
     29 
     30 #include "Font.h"
     31 #include "ProgramBinding.h"
     32 #include "ShaderChromium.h"
     33 
     34 namespace WebCore {
     35 
     36 class GeometryBinding;
     37 class GraphicsContext3D;
     38 class LayerRendererChromium;
     39 class LayerTexture;
     40 
     41 // Class that handles drawing of composited render layers using GL.
     42 class CCHeadsUpDisplay {
     43     WTF_MAKE_NONCOPYABLE(CCHeadsUpDisplay);
     44 public:
     45     static PassOwnPtr<CCHeadsUpDisplay> create(LayerRendererChromium* owner)
     46     {
     47         return adoptPtr(new CCHeadsUpDisplay(owner));
     48     }
     49 
     50     ~CCHeadsUpDisplay();
     51 
     52     void onPresent();
     53 
     54     void setShowFPSCounter(bool enable) { m_showFPSCounter = enable; }
     55     bool showFPSCounter() const { return m_showFPSCounter; }
     56 
     57     void setShowPlatformLayerTree(bool enable) { m_showPlatformLayerTree = enable; }
     58     bool showPlatformLayerTree() const { return m_showPlatformLayerTree; }
     59 
     60     bool enabled() const { return m_showPlatformLayerTree || m_showFPSCounter; }
     61     void draw();
     62 
     63     typedef ProgramBinding<VertexShaderPosTex, FragmentShaderBGRATexAlpha> Program;
     64 
     65 private:
     66     explicit CCHeadsUpDisplay(LayerRendererChromium* owner);
     67     void drawHudContents(GraphicsContext*, const IntSize& hudSize);
     68     void drawFPSCounter(GraphicsContext*, int top, int height);
     69     void drawPlatformLayerTree(GraphicsContext*, int top);
     70 
     71 
     72     int m_currentFrameNumber;
     73 
     74     double m_filteredFrameTime;
     75 
     76     OwnPtr<LayerTexture> m_hudTexture;
     77 
     78     LayerRendererChromium* m_layerRenderer;
     79 
     80     static const int kPresentHistorySize = 64;
     81     double m_presentTimeHistoryInSec[kPresentHistorySize];
     82 
     83     bool m_showFPSCounter;
     84     bool m_showPlatformLayerTree;
     85 
     86     OwnPtr<Font> m_smallFont;
     87     OwnPtr<Font> m_mediumFont;
     88 };
     89 
     90 }
     91 
     92 #endif // USE(ACCELERATED_COMPOSITING)
     93 
     94 #endif
     95