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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_Orientation_h
#define mozilla_image_Orientation_h
#include <stdint.h>
namespace mozilla {
namespace image {
enum class Angle : uint8_t {
D0,
D90,
D180,
D270
};
enum class Flip : uint8_t {
Unflipped,
Horizontal
};
/**
* A struct that describes an image's orientation as a rotation optionally
* followed by a reflection. This may be used to be indicate an image's inherent
* orientation or a desired orientation for the image.
*/
struct Orientation
{
explicit Orientation(Angle aRotation = Angle::D0,
Flip mFlip = Flip::Unflipped)
: rotation(aRotation)
, flip(mFlip)
{ }
bool IsIdentity() const {
return (rotation == Angle::D0) && (flip == Flip::Unflipped);
}
bool SwapsWidthAndHeight() const {
return (rotation == Angle::D90) || (rotation == Angle::D270);
}
bool operator==(const Orientation& aOther) const {
return (rotation == aOther.rotation) && (flip == aOther.flip);
}
bool operator!=(const Orientation& aOther) const {
return !(*this == aOther);
}
Angle rotation;
Flip flip;
};
} // namespace image
} // namespace mozilla
#endif // mozilla_image_Orientation_h
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