components/enhanced_bookmarks/image_store_util.h

   1 // Copyright 2014 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 COMPONENTS_ENHANCED_BOOKMARKS_IMAGE_STORE_UTIL_H_
   6 #define COMPONENTS_ENHANCED_BOOKMARKS_IMAGE_STORE_UTIL_H_
   7
   8 #include "base/memory/ref_counted_memory.h"
   9 #include "third_party/skia/include/core/SkColor.h"
  10 #include "ui/gfx/geometry/size.h"
  11 #include "ui/gfx/image/image.h"
  12
  13 namespace enhanced_bookmarks {
  14 // The two methods below archive and unarchive an image to and from a bag of
  15 // bytes. There is no API on gfx::Image capable of doing it while preserving the
  16 // scale of the image.
  17
  18 // Encode |image| to bytes, that can be decoded using the below |ImageForBytes|
  19 // function. If encoding fails, then returned scoped_refptr has NULL.
  20 scoped_refptr<base::RefCountedMemory> BytesForImage(const gfx::Image& image);
  21
  22 // Decode the image bytes encoded by the above |BytesForImage| function and
  23 // returns a gfx::Image. If decoding fails, returns an empty image.
  24 gfx::Image ImageForBytes(const scoped_refptr<base::RefCountedMemory>& data);
  25
  26 // Returns the dominant color for |image|. This method can be slow on very large
  27 // images.
  28 SkColor DominantColorForImage(const gfx::Image& image);
  29 }
  30
  31 #endif  // COMPONENTS_ENHANCED_BOOKMARKS_IMAGE_STORE_UTIL_H_