cc/resources/transparency_display_item.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_TRANSPARENCY_DISPLAY_ITEM_H_
   6 #define CC_RESOURCES_TRANSPARENCY_DISPLAY_ITEM_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "cc/base/cc_export.h"
  10 #include "cc/resources/display_item.h"
  11 #include "skia/ext/refptr.h"
  12 #include "third_party/skia/include/core/SkXfermode.h"
  13 #include "ui/gfx/geometry/rect_f.h"
  14
  15 class SkCanvas;
  16 class SkDrawPictureCallback;
  17
  18 namespace cc {
  19
  20 class CC_EXPORT TransparencyDisplayItem : public DisplayItem {
  21  public:
  22   ~TransparencyDisplayItem() override;
  23
  24   static scoped_ptr<TransparencyDisplayItem> Create(
  25       float opacity,
  26       SkXfermode::Mode blend_mode) {
  27     return make_scoped_ptr(new TransparencyDisplayItem(opacity, blend_mode));
  28   }
  29
  30   void Raster(SkCanvas* canvas, SkDrawPictureCallback* callback) const override;
  31
  32   bool IsSuitableForGpuRasterization() const override;
  33   int ApproximateOpCount() const override;
  34   size_t PictureMemoryUsage() const override;
  35   void AsValueInto(base::debug::TracedValue* array) const override;
  36
  37  protected:
  38   TransparencyDisplayItem(float opacity, SkXfermode::Mode blend_mode);
  39
  40  private:
  41   float opacity_;
  42   SkXfermode::Mode blend_mode_;
  43 };
  44
  45 class CC_EXPORT EndTransparencyDisplayItem : public DisplayItem {
  46  public:
  47   ~EndTransparencyDisplayItem() override;
  48
  49   static scoped_ptr<EndTransparencyDisplayItem> Create() {
  50     return make_scoped_ptr(new EndTransparencyDisplayItem());
  51   }
  52
  53   void Raster(SkCanvas* canvas, SkDrawPictureCallback* callback) const override;
  54
  55   bool IsSuitableForGpuRasterization() const override;
  56   int ApproximateOpCount() const override;
  57   size_t PictureMemoryUsage() const override;
  58   void AsValueInto(base::debug::TracedValue* array) const override;
  59
  60  protected:
  61   EndTransparencyDisplayItem();
  62 };
  63
  64 }  // namespace cc
  65
  66 #endif  // CC_RESOURCES_TRANSPARENCY_DISPLAY_ITEM_H_