зеркало из https://github.com/mozilla/gecko-dev.git
52 строки
1.4 KiB
C++
52 строки
1.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_image_Orientation_h
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#define mozilla_image_Orientation_h
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#include <stdint.h>
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namespace mozilla {
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namespace image {
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enum class Angle : uint8_t { D0, D90, D180, D270 };
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enum class Flip : uint8_t { Unflipped, Horizontal };
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/**
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* A struct that describes an image's orientation as a rotation optionally
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* followed by a reflection. This may be used to be indicate an image's inherent
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* orientation or a desired orientation for the image.
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*/
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struct Orientation {
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explicit Orientation(Angle aRotation = Angle::D0,
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Flip mFlip = Flip::Unflipped)
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: rotation(aRotation), flip(mFlip) {}
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bool IsIdentity() const {
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return (rotation == Angle::D0) && (flip == Flip::Unflipped);
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}
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bool SwapsWidthAndHeight() const {
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return (rotation == Angle::D90) || (rotation == Angle::D270);
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}
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bool operator==(const Orientation& aOther) const {
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return (rotation == aOther.rotation) && (flip == aOther.flip);
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}
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bool operator!=(const Orientation& aOther) const {
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return !(*this == aOther);
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}
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Angle rotation;
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Flip flip;
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};
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} // namespace image
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} // namespace mozilla
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#endif // mozilla_image_Orientation_h
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