cc/debug/debug_rect_history.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_DEBUG_DEBUG_RECT_HISTORY_H_
   6 #define CC_DEBUG_DEBUG_RECT_HISTORY_H_
   7
   8 #include <vector>
   9 #include "base/basictypes.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "cc/layers/layer_lists.h"
  12 #include "ui/gfx/geometry/rect.h"
  13
  14 namespace cc {
  15
  16 class LayerImpl;
  17 class LayerTreeDebugState;
  18
  19 // There are currently six types of debug rects:
  20 //
  21 // - Paint rects (update rects): regions of a layer that needed to be
  22 // re-uploaded to the texture resource; in most cases implying that they had to
  23 // be repainted, too.
  24 //
  25 // - Property-changed rects: enclosing bounds of layers that cause changes to
  26 // the screen even if the layer did not change internally. (For example, if the
  27 // layer's opacity or position changes.)
  28 //
  29 // - Surface damage rects: the aggregate damage on a target surface that is
  30 // caused by all layers and surfaces that contribute to it. This includes (1)
  31 // paint rects, (2) property- changed rects, and (3) newly exposed areas.
  32 //
  33 // - Screen space rects: this is the region the contents occupy in screen space.
  34 //
  35 // - Replica screen space rects: this is the region the replica's contents
  36 // occupy in screen space.
  37 //
  38 // - Occluding rects: these are the regions that contribute to the occluded
  39 // region.
  40 //
  41 // - Non-Occluding rects: these are the regions of composited layers that do not
  42 //   contribute to the occluded region.
  43 //
  44 enum DebugRectType {
  45   PAINT_RECT_TYPE,
  46   PROPERTY_CHANGED_RECT_TYPE,
  47   SURFACE_DAMAGE_RECT_TYPE,
  48   SCREEN_SPACE_RECT_TYPE,
  49   REPLICA_SCREEN_SPACE_RECT_TYPE,
  50   OCCLUDING_RECT_TYPE,
  51   NONOCCLUDING_RECT_TYPE,
  52   TOUCH_EVENT_HANDLER_RECT_TYPE,
  53   WHEEL_EVENT_HANDLER_RECT_TYPE,
  54   SCROLL_EVENT_HANDLER_RECT_TYPE,
  55   NON_FAST_SCROLLABLE_RECT_TYPE,
  56   ANIMATION_BOUNDS_RECT_TYPE,
  57 };
  58
  59 struct DebugRect {
  60   DebugRect(DebugRectType new_type, const gfx::Rect& new_rect)
  61       : type(new_type), rect(new_rect) {}
  62
  63   DebugRectType type;
  64   gfx::Rect rect;
  65 };
  66
  67 // This class maintains a history of rects of various types that can be used
  68 // for debugging purposes. The overhead of collecting rects is performed only if
  69 // the appropriate LayerTreeSettings are enabled.
  70 class DebugRectHistory {
  71  public:
  72   static scoped_ptr<DebugRectHistory> Create();
  73
  74   ~DebugRectHistory();
  75
  76   // Note: Saving debug rects must happen before layers' change tracking is
  77   // reset.
  78   void SaveDebugRectsForCurrentFrame(
  79       LayerImpl* root_layer,
  80       LayerImpl* hud_layer,
  81       const LayerImplList& render_surface_layer_list,
  82       const std::vector<gfx::Rect>& occluding_screen_space_rects,
  83       const std::vector<gfx::Rect>& non_occluding_screen_space_rects,
  84       const LayerTreeDebugState& debug_state);
  85
  86   const std::vector<DebugRect>& debug_rects() { return debug_rects_; }
  87
  88  private:
  89   DebugRectHistory();
  90
  91   void SavePaintRects(LayerImpl* layer);
  92   void SavePropertyChangedRects(const LayerImplList& render_surface_layer_list,
  93                                 LayerImpl* hud_layer);
  94   void SaveSurfaceDamageRects(
  95       const LayerImplList& render_surface_layer_list);
  96   void SaveScreenSpaceRects(
  97       const LayerImplList& render_surface_layer_list);
  98   void SaveOccludingRects(
  99       const std::vector<gfx::Rect>& occluding_screen_space_rects);
 100   void SaveNonOccludingRects(
 101       const std::vector<gfx::Rect>& non_occluding_screen_space_rects);
 102   void SaveTouchEventHandlerRects(LayerImpl* layer);
 103   void SaveTouchEventHandlerRectsCallback(LayerImpl* layer);
 104   void SaveWheelEventHandlerRects(LayerImpl* layer);
 105   void SaveWheelEventHandlerRectsCallback(LayerImpl* layer);
 106   void SaveScrollEventHandlerRects(LayerImpl* layer);
 107   void SaveScrollEventHandlerRectsCallback(LayerImpl* layer);
 108   void SaveNonFastScrollableRects(LayerImpl* layer);
 109   void SaveNonFastScrollableRectsCallback(LayerImpl* layer);
 110   void SaveLayerAnimationBoundsRects(
 111       const LayerImplList& render_surface_layer_list);
 112
 113   std::vector<DebugRect> debug_rects_;
 114
 115   DISALLOW_COPY_AND_ASSIGN(DebugRectHistory);
 116 };
 117
 118 }  // namespace cc
 119
 120 #endif  // CC_DEBUG_DEBUG_RECT_HISTORY_H_