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/geometry/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 SetOpaque(bool opaque) override;
  25   void SetFillsBoundsCompletely(bool fills_bounds) override;
  26   void SetBackgroundColor(SkColor background_color) override;
  27
  28  protected:
  29   ContentLayerUpdater(scoped_ptr<LayerPainter> painter, int layer_id);
  30   ~ContentLayerUpdater() override;
  31
  32   // Paints the contents. |content_size| size of the underlying layer in
  33   // layer's content space. |paint_rect| bounds to paint in content space of the
  34   // layer. Both |content_size| and |paint_rect| are in pixels.
  35   void PaintContents(SkCanvas* canvas,
  36                      const gfx::Size& layer_content_size,
  37                      const gfx::Rect& paint_rect,
  38                      float contents_width_scale,
  39                      float contents_height_scale);
  40   gfx::Rect paint_rect() const { return paint_rect_; }
  41
  42   bool layer_is_opaque() const { return layer_is_opaque_; }
  43   bool layer_fills_bounds_completely() const {
  44     return layer_fills_bounds_completely_;
  45   }
  46
  47   SkColor background_color() const { return background_color_; }
  48
  49   int layer_id_;
  50
  51   // True when it is known that all output pixels will be opaque.
  52   bool layer_is_opaque_;
  53   // True when it is known that all output pixels will be filled.
  54   bool layer_fills_bounds_completely_;
  55
  56  private:
  57   gfx::Rect paint_rect_;
  58   scoped_ptr<LayerPainter> painter_;
  59   SkColor background_color_;
  60
  61   DISALLOW_COPY_AND_ASSIGN(ContentLayerUpdater);
  62 };
  63
  64 }  // namespace cc
  65
  66 #endif  // CC_RESOURCES_CONTENT_LAYER_UPDATER_H_