cc/layers/content_layer_client.h

   1 // Copyright 2012 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_LAYERS_CONTENT_LAYER_CLIENT_H_
   6 #define CC_LAYERS_CONTENT_LAYER_CLIENT_H_
   7
   8 #include "cc/base/cc_export.h"
   9
  10 class SkCanvas;
  11
  12 namespace gfx {
  13 class Rect;
  14 class RectF;
  15 }
  16
  17 namespace cc {
  18
  19 class CC_EXPORT ContentLayerClient {
  20  public:
  21   enum GraphicsContextStatus {
  22     GRAPHICS_CONTEXT_DISABLED,
  23     GRAPHICS_CONTEXT_ENABLED
  24   };
  25
  26   virtual void PaintContents(SkCanvas* canvas,
  27                              const gfx::Rect& clip,
  28                              GraphicsContextStatus gc_status) = 0;
  29
  30   // Called by the content layer during the update phase.
  31   // If the client paints LCD text, it may want to invalidate the layer.
  32   virtual void DidChangeLayerCanUseLCDText() = 0;
  33
  34   // If true the layer may skip clearing the background before rasterizing,
  35   // because it will cover any uncleared data with content.
  36   virtual bool FillsBoundsCompletely() const = 0;
  37
  38  protected:
  39   virtual ~ContentLayerClient() {}
  40 };
  41
  42 }  // namespace cc
  43
  44 #endif  // CC_LAYERS_CONTENT_LAYER_CLIENT_H_