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// Copyright (c) 2009 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 CHROME_BROWSER_ICON_LOADER_H_
#define CHROME_BROWSER_ICON_LOADER_H_
#include <string>
#include "base/basictypes.h"
#include "base/file_path.h"
#include "base/ref_counted.h"
class SkBitmap;
////////////////////////////////////////////////////////////////////////////////
//
// A facility to read a file containing an icon asynchronously in the IO
// thread. Returns the icon in the form of an SkBitmap.
//
////////////////////////////////////////////////////////////////////////////////
class IconLoader : public base::RefCountedThreadSafe<IconLoader> {
public:
enum IconSize {
SMALL = 0, // 16x16
NORMAL, // 32x32
LARGE
};
class Delegate {
public:
// Invoked when an icon has been read. |source| is the IconLoader. If the
// icon has been successfully loaded, result is non-null. This method must
// return true if it is taking ownership of the returned bitmap.
virtual bool OnBitmapLoaded(IconLoader* source, SkBitmap* result) = 0;
};
IconLoader() { }
virtual ~IconLoader() { }
// Start reading the icon on the file thread.
virtual void Start() = 0;
// Factory method for returning a platform specific IconLoad.
static IconLoader* Create(const FilePath& path, IconSize size,
Delegate* delegate);
private:
DISALLOW_COPY_AND_ASSIGN(IconLoader);
};
#endif // CHROME_BROWSER_ICON_LOADER_H_
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