gecko/gfx/2d/Point.h

129 lines
4.0 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_POINT_H_
#define MOZILLA_GFX_POINT_H_
#include "mozilla/Attributes.h"
#include "Types.h"
#include "BasePoint.h"
#include "BaseSize.h"
#include <cmath>
namespace mozilla {
namespace gfx {
// This should only be used by the typedefs below.
struct UnknownUnits {};
template<class units>
struct IntPointTyped :
public BasePoint< int32_t, IntPointTyped<units> >,
public units {
typedef BasePoint< int32_t, IntPointTyped<units> > Super;
IntPointTyped() : Super() {}
MOZ_CONSTEXPR IntPointTyped(int32_t aX, int32_t aY) : Super(aX, aY) {}
// XXX When all of the code is ported, the following functions to convert to and from
// unknown types should be removed.
static IntPointTyped<units> FromUnknownPoint(const IntPointTyped<UnknownUnits>& aPoint) {
return IntPointTyped<units>(aPoint.x, aPoint.y);
}
IntPointTyped<UnknownUnits> ToUnknownPoint() const {
return IntPointTyped<UnknownUnits>(this->x, this->y);
}
};
typedef IntPointTyped<UnknownUnits> IntPoint;
template<class units>
struct PointTyped :
public BasePoint< Float, PointTyped<units> >,
public units {
typedef BasePoint< Float, PointTyped<units> > Super;
PointTyped() : Super() {}
PointTyped(Float aX, Float aY) : Super(aX, aY) {}
PointTyped(const IntPointTyped<units>& point) : Super(float(point.x), float(point.y)) {}
// XXX When all of the code is ported, the following functions to convert to and from
// unknown types should be removed.
static PointTyped<units> FromUnknownPoint(const PointTyped<UnknownUnits>& aPoint) {
return PointTyped<units>(aPoint.x, aPoint.y);
}
PointTyped<UnknownUnits> ToUnknownPoint() const {
return PointTyped<UnknownUnits>(this->x, this->y);
}
};
typedef PointTyped<UnknownUnits> Point;
template<class units>
IntPointTyped<units> RoundedToInt(const PointTyped<units>& aPoint) {
return IntPointTyped<units>(int32_t(floorf(aPoint.x + 0.5f)),
int32_t(floorf(aPoint.y + 0.5f)));
}
template<class units>
struct IntSizeTyped :
public BaseSize< int32_t, IntSizeTyped<units> >,
public units {
typedef BaseSize< int32_t, IntSizeTyped<units> > Super;
MOZ_CONSTEXPR IntSizeTyped() : Super() {}
MOZ_CONSTEXPR IntSizeTyped(int32_t aWidth, int32_t aHeight) : Super(aWidth, aHeight) {}
// XXX When all of the code is ported, the following functions to convert to and from
// unknown types should be removed.
static IntSizeTyped<units> FromUnknownSize(const IntSizeTyped<UnknownUnits>& aSize) {
return IntSizeTyped<units>(aSize.width, aSize.height);
}
IntSizeTyped<UnknownUnits> ToUnknownSize() const {
return IntSizeTyped<UnknownUnits>(this->width, this->height);
}
};
typedef IntSizeTyped<UnknownUnits> IntSize;
template<class units>
struct SizeTyped :
public BaseSize< Float, SizeTyped<units> >,
public units {
typedef BaseSize< Float, SizeTyped<units> > Super;
SizeTyped() : Super() {}
SizeTyped(Float aWidth, Float aHeight) : Super(aWidth, aHeight) {}
explicit SizeTyped(const IntSizeTyped<units>& size) :
Super(float(size.width), float(size.height)) {}
// XXX When all of the code is ported, the following functions to convert to and from
// unknown types should be removed.
static SizeTyped<units> FromUnknownSize(const SizeTyped<UnknownUnits>& aSize) {
return SizeTyped<units>(aSize.width, aSize.height);
}
SizeTyped<UnknownUnits> ToUnknownSize() const {
return SizeTyped<UnknownUnits>(this->width, this->height);
}
};
typedef SizeTyped<UnknownUnits> Size;
template<class units>
IntSizeTyped<units> RoundedToInt(const SizeTyped<units>& aSize) {
return IntSizeTyped<units>(int32_t(floorf(aSize.width + 0.5f)),
int32_t(floorf(aSize.height + 0.5f)));
}
}
}
#endif /* MOZILLA_GFX_POINT_H_ */