cc/resources/skpicture_content_layer_updater.h

   1 // Copyright 2011 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_SKPICTURE_CONTENT_LAYER_UPDATER_H_
   6 #define CC_RESOURCES_SKPICTURE_CONTENT_LAYER_UPDATER_H_
   7
   8 #include "cc/resources/content_layer_updater.h"
   9 #include "skia/ext/refptr.h"
  10 #include "third_party/skia/include/core/SkPicture.h"
  11
  12 class SkCanvas;
  13
  14 namespace cc {
  15
  16 class LayerPainter;
  17
  18 // This class records the content_rect into an SkPicture. Subclass provides
  19 // SkCanvas to DrawPicture() for tile updating based on this recorded picture.
  20 class SkPictureContentLayerUpdater : public ContentLayerUpdater {
  21  protected:
  22   SkPictureContentLayerUpdater(
  23       scoped_ptr<LayerPainter> painter,
  24       int layer_id);
  25   ~SkPictureContentLayerUpdater() override;
  26
  27   void PrepareToUpdate(const gfx::Size& content_size,
  28                        const gfx::Rect& paint_rect,
  29                        const gfx::Size& tile_size,
  30                        float contents_width_scale,
  31                        float contents_height_scale) override;
  32   void DrawPicture(SkCanvas* canvas);
  33
  34  private:
  35   skia::RefPtr<SkPicture> picture_;
  36
  37   DISALLOW_COPY_AND_ASSIGN(SkPictureContentLayerUpdater);
  38 };
  39
  40 }  // namespace cc
  41
  42 #endif  // CC_RESOURCES_SKPICTURE_CONTENT_LAYER_UPDATER_H_