gecko-dev/image/ImageMetadata.h
Seth Fowler 973fa019ef Bug 1187386 (Part 5) - Merge Decoder::SetSizeOnImage() into ImageMetadata::SetOnImage(). r=tn
--HG--
extra : rebase_source : 5da2023b266e44970fd0fff7442ad8eea4939379
2015-07-31 07:29:12 -07:00

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1.8 KiB
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_image_ImageMetadata_h
#define mozilla_image_ImageMetadata_h
#include <stdint.h>
#include "mozilla/Maybe.h"
#include "nsSize.h"
#include "Orientation.h"
namespace mozilla {
namespace image {
class RasterImage;
// The metadata about an image that decoders accumulate as they decode.
class ImageMetadata
{
public:
ImageMetadata()
: mHotspotX(-1)
, mHotspotY(-1)
, mLoopCount(-1)
{ }
// Set the metadata this object represents on an image.
nsresult SetOnImage(RasterImage* aImage);
void SetHotspot(uint16_t hotspotx, uint16_t hotspoty)
{
mHotspotX = hotspotx;
mHotspotY = hotspoty;
}
void SetLoopCount(int32_t loopcount)
{
mLoopCount = loopcount;
}
void SetSize(int32_t width, int32_t height, Orientation orientation)
{
if (!HasSize()) {
mSize.emplace(nsIntSize(width, height));
mOrientation.emplace(orientation);
}
}
bool HasSize() const { return mSize.isSome(); }
bool HasOrientation() const { return mOrientation.isSome(); }
int32_t GetWidth() const { return mSize->width; }
int32_t GetHeight() const { return mSize->height; }
nsIntSize GetSize() const { return *mSize; }
Orientation GetOrientation() const { return *mOrientation; }
private:
// The hotspot found on cursors, or -1 if none was found.
int32_t mHotspotX;
int32_t mHotspotY;
// The loop count for animated images, or -1 for infinite loop.
int32_t mLoopCount;
Maybe<nsIntSize> mSize;
Maybe<Orientation> mOrientation;
};
} // namespace image
} // namespace mozilla
#endif // mozilla_image_ImageMetadata_h