Local salient image storage for enhanced bookmark experiment.

components/enhanced_bookmarks/image_store_util.cc

+// Copyright 2014 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.
+
+#include "components/enhanced_bookmarks/image_store_util.h"
+
+#include "ui/gfx/image/image_skia.h"
+#include "ui/gfx/image/image_util.h"
+
+namespace {
+const int kJpegEncodingQuality = 70;
+}  // namespace
+
+namespace enhanced_bookmarks {
+
+scoped_refptr<base::RefCountedMemory> BytesForImage(const gfx::Image& image) {
+  DCHECK(image.AsImageSkia().image_reps().size() == 1);
+  DCHECK(image.AsImageSkia().image_reps().begin()->scale() == 1.0f);
+
+  std::vector<unsigned char> data;
+  bool succeeded =
+      gfx::JPEG1xEncodedDataFromImage(image, kJpegEncodingQuality, &data);
+
+  if (!succeeded)
+    return scoped_refptr<base::RefCountedMemory>();
+
+  return scoped_refptr<base::RefCountedMemory>(new base::RefCountedBytes(data));
+}
+
+gfx::Image ImageForBytes(const scoped_refptr<base::RefCountedMemory>& bytes) {
+  return gfx::ImageFrom1xJPEGEncodedData(bytes->front(), bytes->size());
+}
+}