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// Copyright (c) 2011 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.
// An Image wraps an image any flavor, be it platform-native GdkBitmap/NSImage,
// or a SkBitmap. This also provides easy conversion to other image types
// through operator overloading. It will cache the converted representations
// internally to prevent double-conversion.
//
// The lifetime of both the initial representation and any converted ones are
// tied to the lifetime of the Image object itself.
#ifndef UI_GFX_IMAGE_H_
#define UI_GFX_IMAGE_H_
#pragma once
#include <map>
#include "base/basictypes.h"
#include "base/gtest_prod_util.h"
#include "build/build_config.h"
#include "ui/gfx/native_widget_types.h" // Forward-declares GdkPixbuf and NSImage.
class SkBitmap;
namespace {
class ImageTest;
}
namespace gfx {
namespace internal {
class ImageRep;
}
class Image {
public:
enum RepresentationType {
kGdkPixbufRep,
kNSImageRep,
kSkBitmapRep,
};
// Creates a new image with the default representation. The object will take
// ownership of the image.
explicit Image(const SkBitmap* bitmap);
#if defined(OS_LINUX)
// Does not increase |pixbuf|'s reference count; expects to take ownership.
explicit Image(GdkPixbuf* pixbuf);
#elif defined(OS_MACOSX)
// Does not retain |image|; expects to take ownership.
explicit Image(NSImage* image);
#endif
// Deletes the image and all of its cached representations.
~Image();
// Conversion handlers.
operator const SkBitmap*();
operator const SkBitmap&();
#if defined(OS_LINUX)
operator GdkPixbuf*();
#elif defined(OS_MACOSX)
operator NSImage*();
#endif
// Inspects the representations map to see if the given type exists.
bool HasRepresentation(RepresentationType type);
// Swaps this image's internal representations with |other|.
void SwapRepresentations(gfx::Image* other);
private:
typedef std::map<RepresentationType, internal::ImageRep*> RepresentationMap;
// Returns the ImageRep for the default representation.
internal::ImageRep* DefaultRepresentation();
// Returns a ImageRep for the given representation type, converting and
// caching if necessary.
internal::ImageRep* GetRepresentation(RepresentationType rep);
// Stores a representation into the map.
void AddRepresentation(internal::ImageRep* rep);
// The type of image that was passed to the constructor. This key will always
// exist in the |representations_| map.
RepresentationType default_representation_;
// All the representations of an Image. Size will always be at least one, with
// more for any converted representations.
RepresentationMap representations_;
friend class ::ImageTest;
DISALLOW_COPY_AND_ASSIGN(Image);
};
} // namespace gfx
#endif // UI_GFX_IMAGE_H_
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