From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- image/Orientation.h | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 image/Orientation.h (limited to 'image/Orientation.h') diff --git a/image/Orientation.h b/image/Orientation.h new file mode 100644 index 000000000..a0f2e1b75 --- /dev/null +++ b/image/Orientation.h @@ -0,0 +1,62 @@ +/* -*- 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 + +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 -- cgit v1.2.3