Introduces ImageSkia::GetRepresentations() for Mac

ui/gfx/image/image_skia.h

 // Copyright (c) 2012 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_GFX_IMAGE_IMAGE_SKIA_H_
 #define UI_GFX_IMAGE_IMAGE_SKIA_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 55 matching lines @@
   operator SkBitmap&() const;
 
   ~ImageSkia();
 
   // Adds |image_rep| to the image reps contained by this object.
   void AddRepresentation(const gfx::ImageSkiaRep& image_rep);
 
   // Removes the image rep of |scale_factor| if present.
   void RemoveRepresentation(ui::ScaleFactor scale_factor);
 
-  // Returns true if the object owns a image rep whose density matches
+  // Returns true if the object owns an image rep whose density matches
   // |scale_factor| exactly.
-  bool HasRepresentation(ui::ScaleFactor scale_factor);
+  bool HasRepresentation(ui::ScaleFactor scale_factor) const;
 
   // Returns the image rep whose density best matches
   // |scale_factor|.
   // Returns a null image rep if the object contains no image reps.
   const gfx::ImageSkiaRep& GetRepresentation(
       ui::ScaleFactor scale_factor) const;
 
+  // Returns the image reps contained by this object.
+  // If the image has a source, this method will attempt to generate
+  // representations from the source for all supported scale factors.
+  std::vector<ImageSkiaRep> GetRepresentations() const;
+
   // Returns true if object is null or its size is empty.
   bool empty() const;
 
   // Returns true if this is a null object.
   // TODO(pkotwicz): Merge this function into empty().
   bool isNull() const { return storage_ == NULL; }
 
   // Width and height of image in DIP coordinate system.
   int width() const;
   int height() const;
   gfx::Size size() const;
 
-  // Wrapper function for SkBitmap::extractBitmap.
   // Operates on each stored image rep. Note that it may not have
   // all image reps for supported scale factors.
   // TODO(oshima|pkotwicz): Investigate if this can be eliminated
   // after ImageSkiaSource conversion.
   bool extractSubset(ImageSkia* dst, const SkIRect& subset) const;
 
-  // Returns pointer to an SkBitmap contained by this object.
-  // TODO(pkotwicz): This is temporary till conversion to gfx::ImageSkia is
-  // done.
+  // Returns pointer to 1x bitmap contained by this object. If there is no 1x
+  // bitmap, the bitmap whose scale factor is closest to 1x is returned.
+  // This function should only be used in unittests and on platforms which do
+  // not support scale factors other than 1x.
+  // TODO(pkotwicz): Return null SkBitmap when the object has no 1x bitmap.
   const SkBitmap* bitmap() const;
 
   // Returns a vector with the image reps contained in this object.
   // There is no guarantee that this will return all images rep for
   // supported scale factors.
   // TODO(oshima): Update all use of this API and make this to fail
   // when source is used.
   std::vector<gfx::ImageSkiaRep> image_reps() const;
 
  private:
   // Initialize ImageSkiaStorage with passed in parameters.
   // If the image rep's bitmap is empty, ImageStorage is set to NULL.
   void Init(const gfx::ImageSkiaRep& image_rep);
 
   // A refptr so that ImageRepSkia can be copied cheaply.
   scoped_refptr<internal::ImageSkiaStorage> storage_;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_IMAGE_IMAGE_SKIA_H_