src/cc/layers/heads_up_display_layer_impl.h

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CC_LAYERS_HEADS_UP_DISPLAY_LAYER_IMPL_H_
   6 #define CC_LAYERS_HEADS_UP_DISPLAY_LAYER_IMPL_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/time/time.h"
  12 #include "cc/base/cc_export.h"
  13 #include "cc/layers/layer_impl.h"
  14 #include "cc/resources/memory_history.h"
  15 #include "cc/resources/scoped_resource.h"
  16
  17 class SkCanvas;
  18 class SkPaint;
  19 class SkTypeface;
  20 struct SkRect;
  21
  22 namespace cc {
  23
  24 class DebugRectHistory;
  25 class FrameRateCounter;
  26 class PaintTimeCounter;
  27
  28 class CC_EXPORT HeadsUpDisplayLayerImpl : public LayerImpl {
  29  public:
  30   static scoped_ptr<HeadsUpDisplayLayerImpl> Create(LayerTreeImpl* tree_impl,
  31                                                     int id) {
  32     return make_scoped_ptr(new HeadsUpDisplayLayerImpl(tree_impl, id));
  33   }
  34   virtual ~HeadsUpDisplayLayerImpl();
  35
  36   virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
  37       OVERRIDE;
  38
  39   virtual bool WillDraw(DrawMode draw_mode,
  40                         ResourceProvider* resource_provider) OVERRIDE;
  41   virtual void AppendQuads(QuadSink* quad_sink,
  42                            AppendQuadsData* append_quads_data) OVERRIDE;
  43   void UpdateHudTexture(DrawMode draw_mode,
  44                         ResourceProvider* resource_provider);
  45
  46   virtual void DidLoseOutputSurface() OVERRIDE;
  47
  48   virtual bool LayerIsAlwaysDamaged() const OVERRIDE;
  49
  50  private:
  51   class Graph {
  52    public:
  53     Graph(double indicator_value, double start_upper_bound);
  54
  55     // Eases the upper bound, which limits what is currently visible in the
  56     // graph, so that the graph always scales to either it's max or
  57     // default_upper_bound.
  58     double UpdateUpperBound();
  59
  60     double value;
  61     double min;
  62     double max;
  63
  64     double current_upper_bound;
  65     const double default_upper_bound;
  66     const double indicator;
  67   };
  68
  69   HeadsUpDisplayLayerImpl(LayerTreeImpl* tree_impl, int id);
  70
  71   virtual const char* LayerTypeAsString() const OVERRIDE;
  72
  73   void UpdateHudContents();
  74   void DrawHudContents(SkCanvas* canvas) const;
  75
  76   void DrawText(SkCanvas* canvas,
  77                 SkPaint* paint,
  78                 const std::string& text,
  79                 SkPaint::Align align,
  80                 int size,
  81                 int x,
  82                 int y) const;
  83   void DrawText(SkCanvas* canvas,
  84                 SkPaint* paint,
  85                 const std::string& text,
  86                 SkPaint::Align align,
  87                 int size,
  88                 const SkPoint& pos) const;
  89   void DrawGraphBackground(SkCanvas* canvas,
  90                            SkPaint* paint,
  91                            const SkRect& bounds) const;
  92   void DrawGraphLines(SkCanvas* canvas,
  93                       SkPaint* paint,
  94                       const SkRect& bounds,
  95                       const Graph& graph) const;
  96
  97   SkRect DrawFPSDisplay(SkCanvas* canvas,
  98                         const FrameRateCounter* fps_counter,
  99                         int right,
 100                         int top) const;
 101   SkRect DrawMemoryDisplay(SkCanvas* canvas,
 102                            int top,
 103                            int right,
 104                            int width) const;
 105   SkRect DrawPaintTimeDisplay(SkCanvas* canvas,
 106                               const PaintTimeCounter* paint_time_counter,
 107                               int top,
 108                               int right) const;
 109   void DrawDebugRects(SkCanvas* canvas,
 110                       DebugRectHistory* debug_rect_history) const;
 111
 112   scoped_ptr<ScopedResource> hud_resource_;
 113   scoped_ptr<SkCanvas> hud_canvas_;
 114
 115   skia::RefPtr<SkTypeface> typeface_;
 116
 117   Graph fps_graph_;
 118   Graph paint_time_graph_;
 119   MemoryHistory::Entry memory_entry_;
 120
 121   base::TimeTicks time_of_last_graph_update_;
 122
 123   DISALLOW_COPY_AND_ASSIGN(HeadsUpDisplayLayerImpl);
 124 };
 125
 126 }  // namespace cc
 127
 128 #endif  // CC_LAYERS_HEADS_UP_DISPLAY_LAYER_IMPL_H_