cc/resources/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_CONTENT_LAYER_UPDATER_H_
   6 #define CC_RESOURCES_CONTENT_LAYER_UPDATER_H_
   7
   8 #include "cc/base/cc_export.h"
   9 #include "cc/resources/layer_updater.h"
  10 #include "ui/gfx/rect.h"
  11
  12 class SkCanvas;
  13
  14 namespace cc {
  15
  16 class LayerPainter;
  17 class RenderingStatsInstrumentation;
  18
  19 // Base class for BitmapContentLayerUpdater and
  20 // SkPictureContentLayerUpdater that reduces code duplication between
  21 // their respective PaintContents implementations.
  22 class CC_EXPORT ContentLayerUpdater : public LayerUpdater {
  23  public:
  24   void set_rendering_stats_instrumentation(RenderingStatsInstrumentation* rsi);
  25   virtual void SetOpaque(bool opaque) OVERRIDE;
  26   virtual void SetFillsBoundsCompletely(bool fills_bounds) OVERRIDE;
  27
  28  protected:
  29   ContentLayerUpdater(scoped_ptr<LayerPainter> painter,
  30                       RenderingStatsInstrumentation* stats_instrumentation,
  31                       int layer_id);
  32   virtual ~ContentLayerUpdater();
  33
  34   void PaintContents(SkCanvas* canvas,
  35                      const gfx::Rect& content_rect,
  36                      float contents_width_scale,
  37                      float contents_height_scale,
  38                      gfx::Rect* resulting_opaque_rect);
  39   gfx::Rect content_rect() const { return content_rect_; }
  40
  41   bool layer_is_opaque() const { return layer_is_opaque_; }
  42   bool layer_fills_bounds_completely() const {
  43     return layer_fills_bounds_completely_;
  44   }
  45
  46   RenderingStatsInstrumentation* rendering_stats_instrumentation_;
  47   int layer_id_;
  48
  49   // True when it is known that all output pixels will be opaque.
  50   bool layer_is_opaque_;
  51   // True when it is known that all output pixels will be filled.
  52   bool layer_fills_bounds_completely_;
  53
  54  private:
  55   gfx::Rect content_rect_;
  56   scoped_ptr<LayerPainter> painter_;
  57
  58   DISALLOW_COPY_AND_ASSIGN(ContentLayerUpdater);
  59 };
  60
  61 }  // namespace cc
  62
  63 #endif  // CC_RESOURCES_CONTENT_LAYER_UPDATER_H_