Implements core logic for Pixel Canvas

ui/compositor/canvas_painter.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_COMPOSITOR_CANVAS_PAINTER_H_
 #define UI_COMPOSITOR_CANVAS_PAINTER_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "ui/compositor/compositor_export.h"
@@ skipping 11 matching lines @@
 // CanvasPainter, the context() can be used to do painting using the normal
 // composited paint paths.  When the painter is destroyed, any painting done
 // with the context() will be rastered into the provided output bitmap.
 //
 // TODO(enne): rename this class to be PaintContextRasterizer or some such.
 class COMPOSITOR_EXPORT CanvasPainter {
  public:
   CanvasPainter(SkBitmap* output,
                 const gfx::Size& paint_size,
                 float raster_scale,
-                SkColor clear_color);
+                SkColor clear_color,
+                bool is_pixel_canvas);
   ~CanvasPainter();
 
   const PaintContext& context() const { return context_; }
 
  private:
   SkBitmap* const output_;
   const gfx::Size paint_size_;
   const float raster_scale_;
   const SkColor clear_color_;
   scoped_refptr<cc::DisplayItemList> list_;
   PaintContext context_;
 
   DISALLOW_COPY_AND_ASSIGN(CanvasPainter);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_CANVAS_PAINTER_H_