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