mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-11 08:13:35 +00:00
a8939590de
The bulk of this commit was generated by running:
run-clang-tidy.py \
-checks='-*,llvm-namespace-comment' \
-header-filter=^/.../mozilla-central/.* \
-fix
86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
/* -*- Mode: C++; tab-width: 20; 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_GFX_SCALEFACTOR_H_
|
|
#define MOZILLA_GFX_SCALEFACTOR_H_
|
|
|
|
#include "mozilla/Attributes.h"
|
|
|
|
#include "gfxPoint.h"
|
|
|
|
namespace mozilla {
|
|
namespace gfx {
|
|
|
|
/*
|
|
* This class represents a scaling factor between two different pixel unit
|
|
* systems. This is effectively a type-safe float, intended to be used in
|
|
* combination with the known-type instances of gfx::Point, gfx::Rect, etc.
|
|
*
|
|
* This class is meant to be used in cases where a single scale applies to
|
|
* both the x and y axes. For cases where two diferent scales apply, use
|
|
* ScaleFactors2D.
|
|
*/
|
|
template<class src, class dst>
|
|
struct ScaleFactor {
|
|
float scale;
|
|
|
|
MOZ_CONSTEXPR ScaleFactor() : scale(1.0) {}
|
|
MOZ_CONSTEXPR ScaleFactor(const ScaleFactor<src, dst>& aCopy) : scale(aCopy.scale) {}
|
|
explicit MOZ_CONSTEXPR ScaleFactor(float aScale) : scale(aScale) {}
|
|
|
|
ScaleFactor<dst, src> Inverse() {
|
|
return ScaleFactor<dst, src>(1 / scale);
|
|
}
|
|
|
|
bool operator==(const ScaleFactor<src, dst>& aOther) const {
|
|
return scale == aOther.scale;
|
|
}
|
|
|
|
bool operator!=(const ScaleFactor<src, dst>& aOther) const {
|
|
return !(*this == aOther);
|
|
}
|
|
|
|
bool operator<(const ScaleFactor<src, dst>& aOther) const {
|
|
return scale < aOther.scale;
|
|
}
|
|
|
|
bool operator<=(const ScaleFactor<src, dst>& aOther) const {
|
|
return scale <= aOther.scale;
|
|
}
|
|
|
|
bool operator>(const ScaleFactor<src, dst>& aOther) const {
|
|
return scale > aOther.scale;
|
|
}
|
|
|
|
bool operator>=(const ScaleFactor<src, dst>& aOther) const {
|
|
return scale >= aOther.scale;
|
|
}
|
|
|
|
template<class other>
|
|
ScaleFactor<other, dst> operator/(const ScaleFactor<src, other>& aOther) const {
|
|
return ScaleFactor<other, dst>(scale / aOther.scale);
|
|
}
|
|
|
|
template<class other>
|
|
ScaleFactor<src, other> operator/(const ScaleFactor<other, dst>& aOther) const {
|
|
return ScaleFactor<src, other>(scale / aOther.scale);
|
|
}
|
|
|
|
template<class other>
|
|
ScaleFactor<src, other> operator*(const ScaleFactor<dst, other>& aOther) const {
|
|
return ScaleFactor<src, other>(scale * aOther.scale);
|
|
}
|
|
|
|
template<class other>
|
|
ScaleFactor<other, dst> operator*(const ScaleFactor<other, src>& aOther) const {
|
|
return ScaleFactor<other, dst>(scale * aOther.scale);
|
|
}
|
|
};
|
|
|
|
} // namespace gfx
|
|
} // namespace mozilla
|
|
|
|
#endif /* MOZILLA_GFX_SCALEFACTOR_H_ */
|