344 lines
12 KiB
C++
344 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 20; 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_GFX_POINT_H_
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#define MOZILLA_GFX_POINT_H_
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#include "mozilla/Attributes.h"
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#include "Types.h"
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#include "Coord.h"
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#include "BaseCoord.h"
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#include "BasePoint.h"
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#include "BasePoint3D.h"
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#include "BasePoint4D.h"
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#include "BaseSize.h"
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#include "mozilla/TypeTraits.h"
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#include <cmath>
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namespace mozilla {
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template <typename> struct IsPixel;
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namespace gfx {
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// This should only be used by the typedefs below.
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struct UnknownUnits {};
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} // namespace gfx
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template<> struct IsPixel<gfx::UnknownUnits> : TrueType {};
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namespace gfx {
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/// Use this for parameters of functions to allow implicit conversions to
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/// integer types but not floating point types.
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/// We use this wrapper to prevent IntSize and IntPoint's constructors to
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/// take foating point values as parameters, and not require their constructors
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/// to have implementations for each permutation of integer types.
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template<typename T>
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struct IntParam {
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constexpr MOZ_IMPLICIT IntParam(char val) : value(val) {}
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constexpr MOZ_IMPLICIT IntParam(unsigned char val) : value(val) {}
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constexpr MOZ_IMPLICIT IntParam(short val) : value(val) {}
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constexpr MOZ_IMPLICIT IntParam(unsigned short val) : value(val) {}
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constexpr MOZ_IMPLICIT IntParam(int val) : value(val) {}
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constexpr MOZ_IMPLICIT IntParam(unsigned int val) : value(val) {}
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constexpr MOZ_IMPLICIT IntParam(long val) : value(val) {}
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constexpr MOZ_IMPLICIT IntParam(unsigned long val) : value(val) {}
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constexpr MOZ_IMPLICIT IntParam(long long val) : value(val) {}
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constexpr MOZ_IMPLICIT IntParam(unsigned long long val) : value(val) {}
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template<typename Unit>
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constexpr MOZ_IMPLICIT IntParam(IntCoordTyped<Unit> val) : value(val) {}
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// Disable the evil ones!
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MOZ_IMPLICIT IntParam(float val) = delete;
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MOZ_IMPLICIT IntParam(double val) = delete;
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T value;
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};
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template<class units, class> struct PointTyped;
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template<class units, class> struct SizeTyped;
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template<class units>
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struct IntPointTyped :
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public BasePoint< int32_t, IntPointTyped<units>, IntCoordTyped<units> >,
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public units {
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static_assert(IsPixel<units>::value,
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"'units' must be a coordinate system tag");
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typedef IntParam<int32_t> ToInt;
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typedef IntCoordTyped<units> Coord;
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typedef BasePoint< int32_t, IntPointTyped<units>, IntCoordTyped<units> > Super;
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constexpr IntPointTyped() : Super() {}
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constexpr IntPointTyped(ToInt aX, ToInt aY) : Super(Coord(aX.value), Coord(aY.value)) {}
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static IntPointTyped<units> Round(float aX, float aY) {
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return IntPointTyped(int32_t(floorf(aX + 0.5)), int32_t(floorf(aY + 0.5)));
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}
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static IntPointTyped<units> Ceil(float aX, float aY) {
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return IntPointTyped(int32_t(ceil(aX)), int32_t(ceil(aY)));
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}
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static IntPointTyped<units> Floor(float aX, float aY) {
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return IntPointTyped(int32_t(floorf(aX)), int32_t(floorf(aY)));
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}
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static IntPointTyped<units> Truncate(float aX, float aY) {
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return IntPointTyped(int32_t(aX), int32_t(aY));
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}
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static IntPointTyped<units> Round(const PointTyped<units, float>& aPoint);
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static IntPointTyped<units> Ceil(const PointTyped<units, float>& aPoint);
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static IntPointTyped<units> Floor(const PointTyped<units, float>& aPoint);
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static IntPointTyped<units> Truncate(const PointTyped<units, float>& aPoint);
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// XXX When all of the code is ported, the following functions to convert to and from
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// unknown types should be removed.
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static IntPointTyped<units> FromUnknownPoint(const IntPointTyped<UnknownUnits>& aPoint) {
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return IntPointTyped<units>(aPoint.x, aPoint.y);
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}
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IntPointTyped<UnknownUnits> ToUnknownPoint() const {
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return IntPointTyped<UnknownUnits>(this->x, this->y);
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}
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};
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typedef IntPointTyped<UnknownUnits> IntPoint;
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template<class units, class F = Float>
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struct PointTyped :
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public BasePoint< F, PointTyped<units, F>, CoordTyped<units, F> >,
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public units {
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static_assert(IsPixel<units>::value,
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"'units' must be a coordinate system tag");
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typedef CoordTyped<units, F> Coord;
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typedef BasePoint< F, PointTyped<units, F>, CoordTyped<units, F> > Super;
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constexpr PointTyped() : Super() {}
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constexpr PointTyped(F aX, F aY) : Super(Coord(aX), Coord(aY)) {}
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// The mixed-type constructors (Float, Coord) and (Coord, Float) are needed to
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// avoid ambiguities because Coord is implicitly convertible to Float.
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constexpr PointTyped(F aX, Coord aY) : Super(Coord(aX), aY) {}
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constexpr PointTyped(Coord aX, F aY) : Super(aX, Coord(aY)) {}
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constexpr PointTyped(Coord aX, Coord aY) : Super(aX.value, aY.value) {}
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constexpr MOZ_IMPLICIT PointTyped(const IntPointTyped<units>& point) : Super(F(point.x), F(point.y)) {}
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// XXX When all of the code is ported, the following functions to convert to and from
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// unknown types should be removed.
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static PointTyped<units, F> FromUnknownPoint(const PointTyped<UnknownUnits, F>& aPoint) {
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return PointTyped<units, F>(aPoint.x, aPoint.y);
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}
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PointTyped<UnknownUnits, F> ToUnknownPoint() const {
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return PointTyped<UnknownUnits, F>(this->x, this->y);
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}
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};
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typedef PointTyped<UnknownUnits> Point;
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typedef PointTyped<UnknownUnits, double> PointDouble;
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template<class units>
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IntPointTyped<units> RoundedToInt(const PointTyped<units>& aPoint) {
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return IntPointTyped<units>::Round(aPoint.x, aPoint.y);
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}
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template<class units>
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IntPointTyped<units> TruncatedToInt(const PointTyped<units>& aPoint) {
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return IntPointTyped<units>::Truncate(aPoint.x, aPoint.y);
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}
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template<class units, class F = Float>
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struct Point3DTyped :
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public BasePoint3D< F, Point3DTyped<units, F> > {
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static_assert(IsPixel<units>::value,
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"'units' must be a coordinate system tag");
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typedef BasePoint3D< F, Point3DTyped<units, F> > Super;
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Point3DTyped() : Super() {}
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Point3DTyped(F aX, F aY, F aZ) : Super(aX, aY, aZ) {}
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// XXX When all of the code is ported, the following functions to convert to and from
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// unknown types should be removed.
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static Point3DTyped<units, F> FromUnknownPoint(const Point3DTyped<UnknownUnits, F>& aPoint) {
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return Point3DTyped<units, F>(aPoint.x, aPoint.y, aPoint.z);
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}
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Point3DTyped<UnknownUnits, F> ToUnknownPoint() const {
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return Point3DTyped<UnknownUnits, F>(this->x, this->y, this->z);
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}
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};
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typedef Point3DTyped<UnknownUnits> Point3D;
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typedef Point3DTyped<UnknownUnits, double> PointDouble3D;
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template<typename units>
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IntPointTyped<units>
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IntPointTyped<units>::Round(const PointTyped<units, float>& aPoint)
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{
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return IntPointTyped::Round(aPoint.x, aPoint.y);
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}
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template<typename units>
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IntPointTyped<units>
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IntPointTyped<units>::Ceil(const PointTyped<units, float>& aPoint)
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{
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return IntPointTyped::Ceil(aPoint.x, aPoint.y);
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}
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template<typename units>
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IntPointTyped<units>
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IntPointTyped<units>::Floor(const PointTyped<units, float>& aPoint)
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{
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return IntPointTyped::Floor(aPoint.x, aPoint.y);
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}
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template<typename units>
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IntPointTyped<units>
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IntPointTyped<units>::Truncate(const PointTyped<units, float>& aPoint)
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{
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return IntPointTyped::Truncate(aPoint.x, aPoint.y);
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}
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template<class units, class F = Float>
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struct Point4DTyped :
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public BasePoint4D< F, Point4DTyped<units, F> > {
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static_assert(IsPixel<units>::value,
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"'units' must be a coordinate system tag");
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typedef BasePoint4D< F, Point4DTyped<units, F> > Super;
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Point4DTyped() : Super() {}
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Point4DTyped(F aX, F aY, F aZ, F aW) : Super(aX, aY, aZ, aW) {}
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// XXX When all of the code is ported, the following functions to convert to and from
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// unknown types should be removed.
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static Point4DTyped<units, F> FromUnknownPoint(const Point4DTyped<UnknownUnits, F>& aPoint) {
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return Point4DTyped<units, F>(aPoint.x, aPoint.y, aPoint.z, aPoint.w);
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}
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Point4DTyped<UnknownUnits, F> ToUnknownPoint() const {
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return Point4DTyped<UnknownUnits, F>(this->x, this->y, this->z, this->w);
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}
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PointTyped<units, F> As2DPoint() {
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return PointTyped<units, F>(this->x / this->w, this->y / this->w);
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}
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};
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typedef Point4DTyped<UnknownUnits> Point4D;
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typedef Point4DTyped<UnknownUnits, double> PointDouble4D;
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template<class units>
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struct IntSizeTyped :
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public BaseSize< int32_t, IntSizeTyped<units> >,
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public units {
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static_assert(IsPixel<units>::value,
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"'units' must be a coordinate system tag");
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typedef IntParam<int32_t> ToInt;
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typedef BaseSize< int32_t, IntSizeTyped<units> > Super;
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constexpr IntSizeTyped() : Super() {}
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constexpr IntSizeTyped(ToInt aWidth, ToInt aHeight) : Super(aWidth.value, aHeight.value) {}
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static IntSizeTyped<units> Round(float aWidth, float aHeight) {
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return IntSizeTyped(int32_t(floorf(aWidth + 0.5)), int32_t(floorf(aHeight + 0.5)));
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}
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static IntSizeTyped<units> Truncate(float aWidth, float aHeight) {
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return IntSizeTyped(int32_t(aWidth), int32_t(aHeight));
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}
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static IntSizeTyped<units> Ceil(float aWidth, float aHeight) {
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return IntSizeTyped(int32_t(ceil(aWidth)), int32_t(ceil(aHeight)));
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}
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static IntSizeTyped<units> Floor(float aWidth, float aHeight) {
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return IntSizeTyped(int32_t(floorf(aWidth)), int32_t(floorf(aHeight)));
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}
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static IntSizeTyped<units> Round(const SizeTyped<units, float>& aSize);
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static IntSizeTyped<units> Ceil(const SizeTyped<units, float>& aSize);
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static IntSizeTyped<units> Floor(const SizeTyped<units, float>& aSize);
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static IntSizeTyped<units> Truncate(const SizeTyped<units, float>& aSize);
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// XXX When all of the code is ported, the following functions to convert to and from
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// unknown types should be removed.
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static IntSizeTyped<units> FromUnknownSize(const IntSizeTyped<UnknownUnits>& aSize) {
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return IntSizeTyped<units>(aSize.width, aSize.height);
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}
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IntSizeTyped<UnknownUnits> ToUnknownSize() const {
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return IntSizeTyped<UnknownUnits>(this->width, this->height);
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}
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};
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typedef IntSizeTyped<UnknownUnits> IntSize;
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template<class units, class F = Float>
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struct SizeTyped :
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public BaseSize< F, SizeTyped<units> >,
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public units {
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static_assert(IsPixel<units>::value,
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"'units' must be a coordinate system tag");
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typedef BaseSize< F, SizeTyped<units, F> > Super;
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constexpr SizeTyped() : Super() {}
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constexpr SizeTyped(F aWidth, F aHeight) : Super(aWidth, aHeight) {}
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explicit SizeTyped(const IntSizeTyped<units>& size) :
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Super(F(size.width), F(size.height)) {}
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// XXX When all of the code is ported, the following functions to convert to and from
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// unknown types should be removed.
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static SizeTyped<units, F> FromUnknownSize(const SizeTyped<UnknownUnits, F>& aSize) {
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return SizeTyped<units, F>(aSize.width, aSize.height);
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}
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SizeTyped<UnknownUnits, F> ToUnknownSize() const {
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return SizeTyped<UnknownUnits, F>(this->width, this->height);
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}
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};
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typedef SizeTyped<UnknownUnits> Size;
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typedef SizeTyped<UnknownUnits, double> SizeDouble;
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template<class units>
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IntSizeTyped<units> RoundedToInt(const SizeTyped<units>& aSize) {
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return IntSizeTyped<units>(int32_t(floorf(aSize.width + 0.5f)),
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int32_t(floorf(aSize.height + 0.5f)));
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}
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template<typename units> IntSizeTyped<units>
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IntSizeTyped<units>::Round(const SizeTyped<units, float>& aSize) {
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return IntSizeTyped::Round(aSize.width, aSize.height);
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}
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template<typename units> IntSizeTyped<units>
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IntSizeTyped<units>::Ceil(const SizeTyped<units, float>& aSize) {
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return IntSizeTyped::Ceil(aSize.width, aSize.height);
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}
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template<typename units> IntSizeTyped<units>
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IntSizeTyped<units>::Floor(const SizeTyped<units, float>& aSize) {
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return IntSizeTyped::Floor(aSize.width, aSize.height);
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}
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template<typename units> IntSizeTyped<units>
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IntSizeTyped<units>::Truncate(const SizeTyped<units, float>& aSize) {
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return IntSizeTyped::Truncate(aSize.width, aSize.height);
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}
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} // namespace gfx
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} // namespace mozilla
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#endif /* MOZILLA_GFX_POINT_H_ */
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