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 #include <vector>
  10
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/time/time.h"
  13 #include "cc/base/cc_export.h"
  14 #include "cc/debug/debug_rect_history.h"
  15 #include "cc/layers/layer_impl.h"
  16 #include "cc/resources/memory_history.h"
  17 #include "cc/resources/scoped_resource.h"
  18
  19 class SkCanvas;
  20 class SkPaint;
  21 class SkTypeface;
  22 struct SkRect;
  23
  24 namespace cc {
  25
  26 class FrameRateCounter;
  27 class PaintTimeCounter;
  28
  29 class CC_EXPORT HeadsUpDisplayLayerImpl : public LayerImpl {
  30  public:
  31   static scoped_ptr<HeadsUpDisplayLayerImpl> Create(LayerTreeImpl* tree_impl,
  32                                                     int id) {
  33     return make_scoped_ptr(new HeadsUpDisplayLayerImpl(tree_impl, id));
  34   }
  35   virtual ~HeadsUpDisplayLayerImpl();
  36
  37   virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
  38       OVERRIDE;
  39
  40   virtual bool WillDraw(DrawMode draw_mode,
  41                         ResourceProvider* resource_provider) OVERRIDE;
  42   virtual void AppendQuads(RenderPass* render_pass,
  43                            const OcclusionTracker<LayerImpl>& occlusion_tracker,
  44                            AppendQuadsData* append_quads_data) OVERRIDE;
  45   void UpdateHudTexture(DrawMode draw_mode,
  46                         ResourceProvider* resource_provider);
  47
  48   virtual void ReleaseResources() OVERRIDE;
  49
  50   bool IsAnimatingHUDContents() const { return fade_step_ > 0; }
  51
  52  private:
  53   class Graph {
  54    public:
  55     Graph(double indicator_value, double start_upper_bound);
  56
  57     // Eases the upper bound, which limits what is currently visible in the
  58     // graph, so that the graph always scales to either it's max or
  59     // default_upper_bound.
  60     double UpdateUpperBound();
  61
  62     double value;
  63     double min;
  64     double max;
  65
  66     double current_upper_bound;
  67     const double default_upper_bound;
  68     const double indicator;
  69   };
  70
  71   HeadsUpDisplayLayerImpl(LayerTreeImpl* tree_impl, int id);
  72
  73   virtual const char* LayerTypeAsString() const OVERRIDE;
  74
  75   virtual void AsValueInto(base::debug::TracedValue* dict) const OVERRIDE;
  76
  77   void UpdateHudContents();
  78   void DrawHudContents(SkCanvas* canvas);
  79
  80   void DrawText(SkCanvas* canvas,
  81                 SkPaint* paint,
  82                 const std::string& text,
  83                 SkPaint::Align align,
  84                 int size,
  85                 int x,
  86                 int y) const;
  87   void DrawText(SkCanvas* canvas,
  88                 SkPaint* paint,
  89                 const std::string& text,
  90                 SkPaint::Align align,
  91                 int size,
  92                 const SkPoint& pos) const;
  93   void DrawGraphBackground(SkCanvas* canvas,
  94                            SkPaint* paint,
  95                            const SkRect& bounds) const;
  96   void DrawGraphLines(SkCanvas* canvas,
  97                       SkPaint* paint,
  98                       const SkRect& bounds,
  99                       const Graph& graph) const;
 100
 101   SkRect DrawFPSDisplay(SkCanvas* canvas,
 102                         const FrameRateCounter* fps_counter,
 103                         int right,
 104                         int top) const;
 105   SkRect DrawMemoryDisplay(SkCanvas* canvas,
 106                            int top,
 107                            int right,
 108                            int width) const;
 109   SkRect DrawPaintTimeDisplay(SkCanvas* canvas,
 110                               const PaintTimeCounter* paint_time_counter,
 111                               int top,
 112                               int right) const;
 113   void DrawDebugRect(SkCanvas* canvas,
 114                      SkPaint* paint,
 115                      const DebugRect& rect,
 116                      SkColor stroke_color,
 117                      SkColor fill_color,
 118                      float stroke_width,
 119                      const std::string& label_text) const;
 120   void DrawDebugRects(SkCanvas* canvas, DebugRectHistory* debug_rect_history);
 121
 122   void AcquireResource(ResourceProvider* resource_provider);
 123   void ReleaseUnmatchedSizeResources(ResourceProvider* resource_provider);
 124
 125   ScopedPtrVector<ScopedResource> resources_;
 126   scoped_ptr<SkCanvas> hud_canvas_;
 127
 128   skia::RefPtr<SkTypeface> typeface_;
 129
 130   Graph fps_graph_;
 131   Graph paint_time_graph_;
 132   MemoryHistory::Entry memory_entry_;
 133   int fade_step_;
 134   std::vector<DebugRect> paint_rects_;
 135
 136   base::TimeTicks time_of_last_graph_update_;
 137
 138   DISALLOW_COPY_AND_ASSIGN(HeadsUpDisplayLayerImpl);
 139 };
 140
 141 }  // namespace cc
 142
 143 #endif  // CC_LAYERS_HEADS_UP_DISPLAY_LAYER_IMPL_H_