cc/resources/display_item_list.h

   1 // Copyright 2014 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_RESOURCES_DISPLAY_ITEM_LIST_H_
   6 #define CC_RESOURCES_DISPLAY_ITEM_LIST_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/trace_event/trace_event.h"
  11 #include "cc/base/cc_export.h"
  12 #include "cc/base/scoped_ptr_vector.h"
  13 #include "cc/resources/display_item.h"
  14 #include "cc/resources/pixel_ref_map.h"
  15 #include "skia/ext/refptr.h"
  16 #include "third_party/skia/include/core/SkPicture.h"
  17 #include "ui/gfx/geometry/rect.h"
  18
  19 class SkCanvas;
  20 class SkDrawPictureCallback;
  21 class SkPictureRecorder;
  22
  23 namespace cc {
  24
  25 class CC_EXPORT DisplayItemList
  26     : public base::RefCountedThreadSafe<DisplayItemList> {
  27  public:
  28   static scoped_refptr<DisplayItemList> Create(gfx::Rect layer_rect,
  29                                                bool use_cached_picture);
  30
  31   void Raster(SkCanvas* canvas,
  32               SkDrawPictureCallback* callback,
  33               float contents_scale) const;
  34
  35   void AppendItem(scoped_ptr<DisplayItem> item);
  36
  37   void CreateAndCacheSkPicture();
  38
  39   bool IsSuitableForGpuRasterization() const;
  40   int ApproximateOpCount() const;
  41   size_t PictureMemoryUsage() const;
  42
  43   scoped_refptr<base::trace_event::ConvertableToTraceFormat> AsValue() const;
  44
  45   void EmitTraceSnapshot() const;
  46
  47   void GatherPixelRefs(const gfx::Size& grid_cell_size);
  48
  49  private:
  50   DisplayItemList(gfx::Rect layer_rect, bool use_cached_picture);
  51   ~DisplayItemList();
  52   ScopedPtrVector<DisplayItem> items_;
  53   skia::RefPtr<SkPicture> picture_;
  54
  55   scoped_ptr<SkPictureRecorder> recorder_;
  56   skia::RefPtr<SkCanvas> canvas_;
  57   bool use_cached_picture_;
  58   bool retain_individual_display_items_;
  59
  60   gfx::Rect layer_rect_;
  61   bool is_suitable_for_gpu_rasterization_;
  62   int approximate_op_count_;
  63
  64   scoped_ptr<PixelRefMap> pixel_refs_;
  65
  66   friend class base::RefCountedThreadSafe<DisplayItemList>;
  67   friend class PixelRefMap::Iterator;
  68   DISALLOW_COPY_AND_ASSIGN(DisplayItemList);
  69 };
  70
  71 }  // namespace cc
  72
  73 #endif  // CC_RESOURCES_DISPLAY_ITEM_LIST_H_