63 lines
1.4 KiB
C++
63 lines
1.4 KiB
C++
/* -*- 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
|