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   virtual void SetBackgroundColor(SkColor background_color) OVERRIDE;
  28
  29  protected:
  30   ContentLayerUpdater(scoped_ptr<LayerPainter> painter,
  31                       RenderingStatsInstrumentation* stats_instrumentation,
  32                       int layer_id);
  33   virtual ~ContentLayerUpdater();
  34
  35   // Paints the contents. |content_size| size of the underlying layer in
  36   // layer's content space. |paint_rect| bounds to paint in content space of the
  37   // layer. Both |content_size| and |paint_rect| are in pixels.
  38   void PaintContents(SkCanvas* canvas,
  39                      const gfx::Size& layer_content_size,
  40                      const gfx::Rect& paint_rect,
  41                      float contents_width_scale,
  42                      float contents_height_scale);
  43   gfx::Rect paint_rect() const { return paint_rect_; }
  44
  45   bool layer_is_opaque() const { return layer_is_opaque_; }
  46   bool layer_fills_bounds_completely() const {
  47     return layer_fills_bounds_completely_;
  48   }
  49
  50   SkColor background_color() const { return background_color_; }
  51
  52   RenderingStatsInstrumentation* rendering_stats_instrumentation_;
  53   int layer_id_;
  54
  55   // True when it is known that all output pixels will be opaque.
  56   bool layer_is_opaque_;
  57   // True when it is known that all output pixels will be filled.
  58   bool layer_fills_bounds_completely_;
  59
  60  private:
  61   gfx::Rect paint_rect_;
  62   scoped_ptr<LayerPainter> painter_;
  63   SkColor background_color_;
  64
  65   DISALLOW_COPY_AND_ASSIGN(ContentLayerUpdater);
  66 };
  67
  68 }  // namespace cc
  69
  70 #endif  // CC_RESOURCES_CONTENT_LAYER_UPDATER_H_