From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- image/Orientation.h | 111 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 111 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 0000000000..e36a468372 --- /dev/null +++ b/image/Orientation.h @@ -0,0 +1,111 @@ +/* -*- 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 +#include "mozilla/gfx/Rect.h" + +namespace mozilla { + +// Pixel values in an image considering orientation metadata, such as the size +// of an image as seen by consumers of the image. +// +// Any public methods on RasterImage that use untyped units are interpreted as +// oriented pixels. +struct OrientedPixel {}; +template <> +struct IsPixel : std::true_type {}; +typedef gfx::IntPointTyped OrientedIntPoint; +typedef gfx::IntSizeTyped OrientedIntSize; +typedef gfx::IntRectTyped OrientedIntRect; + +// Pixel values in an image ignoring orientation metadata, such as are stored +// in surfaces and the raw pixel data in the image. +struct UnorientedPixel {}; +template <> +struct IsPixel : std::true_type {}; +typedef gfx::IntPointTyped UnorientedIntPoint; +typedef gfx::IntSizeTyped UnorientedIntSize; +typedef gfx::IntRectTyped UnorientedIntRect; + +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. + * + * When flipFirst = true, this indicates that the reflection is applied before + * the rotation. (This is used by OrientedImage to represent the inverse of an + * underlying image's Orientation.) + */ +struct Orientation { + explicit Orientation(Angle aRotation = Angle::D0, + Flip aFlip = Flip::Unflipped, bool aFlipFirst = false) + : rotation(aRotation), flip(aFlip), flipFirst(aFlipFirst) {} + + Orientation Reversed() const { + return Orientation(InvertAngle(rotation), flip, !flipFirst); + } + + 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 && + flipFirst == aOther.flipFirst; + } + + bool operator!=(const Orientation& aOther) const { + return !(*this == aOther); + } + + OrientedIntSize ToOriented(const UnorientedIntSize& aSize) const { + if (SwapsWidthAndHeight()) { + return OrientedIntSize(aSize.height, aSize.width); + } else { + return OrientedIntSize(aSize.width, aSize.height); + } + } + + UnorientedIntSize ToUnoriented(const OrientedIntSize& aSize) const { + if (SwapsWidthAndHeight()) { + return UnorientedIntSize(aSize.height, aSize.width); + } else { + return UnorientedIntSize(aSize.width, aSize.height); + } + } + + static Angle InvertAngle(Angle aAngle) { + switch (aAngle) { + case Angle::D90: + return Angle::D270; + case Angle::D270: + return Angle::D90; + default: + return aAngle; + } + } + + Angle rotation; + Flip flip; + bool flipFirst; +}; + +} // namespace image +} // namespace mozilla + +#endif // mozilla_image_Orientation_h -- cgit v1.2.3