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
34namespace WebCore {
35
36class GeometryBinding;
37class GraphicsContext3D;
38class LayerRendererChromium;
39class LayerTexture;
40
41// Class that handles drawing of composited render layers using GL.
42class CCHeadsUpDisplay {
43    WTF_MAKE_NONCOPYABLE(CCHeadsUpDisplay);
44public:
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
65private:
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