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// 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"
#import <UIKit/UIKit.h>
#include "base/mac/scoped_cftyperef.h"
#include "base/mac/scoped_nsobject.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/gfx/color_analysis.h"
namespace {
// An implementation of RefCountedMemory, where the bytes are stored in a
// NSData. This class assumes the NSData is non mutable to avoid a copy.
class RefCountedNSDataMemory : public base::RefCountedMemory {
public:
explicit RefCountedNSDataMemory(NSData* memory) : data_([memory retain]) {}
const unsigned char* front() const override {
return reinterpret_cast<const unsigned char*>([data_ bytes]);
}
size_t size() const override { return [data_ length]; }
private:
~RefCountedNSDataMemory() override {}
base::scoped_nsobject<NSData> data_;
DISALLOW_COPY_AND_ASSIGN(RefCountedNSDataMemory);
};
} // namespace
namespace enhanced_bookmarks {
// Encodes the UIImage representation of a gfx::Image.
scoped_refptr<base::RefCountedMemory> BytesForImage(const gfx::Image& image) {
DCHECK(image.HasRepresentation(gfx::Image::kImageRepCocoaTouch));
return scoped_refptr<RefCountedNSDataMemory>(new RefCountedNSDataMemory(
[NSKeyedArchiver archivedDataWithRootObject:image.ToUIImage()]));
}
// Decodes the UIImage in the bytes and returns a gfx::Image.
gfx::Image ImageForBytes(const scoped_refptr<base::RefCountedMemory>& data) {
return gfx::Image([[NSKeyedUnarchiver unarchiveObjectWithData:
[NSData dataWithBytes:data->front() length:data->size()]] retain]);
}
SkColor DominantColorForImage(const gfx::Image& image) {
return color_utils::CalculateKMeanColorOfBitmap(*image.ToSkBitmap());
}
} // namespace enhanced_bookmarks
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