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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 NSPOINT_H
#define NSPOINT_H
#include <cstdint>
#include "nsCoord.h"
#include "mozilla/gfx/BasePoint.h"
#include "mozilla/gfx/Point.h"
// nsIntPoint represents a point in one of the types of pixels.
// Uses of nsIntPoint should eventually be converted to CSSIntPoint,
// LayoutDeviceIntPoint, etc. (see layout/base/Units.h).
typedef mozilla::gfx::IntPoint nsIntPoint;
// nsPoint represents a point in app units.
struct nsPoint : public mozilla::gfx::BasePoint<nscoord, nsPoint> {
typedef mozilla::gfx::BasePoint<nscoord, nsPoint> Super;
nsPoint() = default;
nsPoint(const nsPoint& aPoint) = default;
nsPoint(nscoord aX, nscoord aY) : Super(aX, aY) {}
inline nsIntPoint ScaleToNearestPixels(float aXScale, float aYScale,
nscoord aAppUnitsPerPixel) const;
inline nsIntPoint ToNearestPixels(nscoord aAppUnitsPerPixel) const;
/**
* Return this point scaled to a different appunits per pixel (APP) ratio.
* @param aFromAPP the APP to scale from
* @param aToAPP the APP to scale to
*/
[[nodiscard]] inline nsPoint ScaleToOtherAppUnits(int32_t aFromAPP,
int32_t aToAPP) const;
[[nodiscard]] inline nsPoint RemoveResolution(const float resolution) const;
[[nodiscard]] inline nsPoint ApplyResolution(const float resolution) const;
};
inline nsPoint ToAppUnits(const nsIntPoint& aPoint, nscoord aAppUnitsPerPixel);
inline nsIntPoint nsPoint::ScaleToNearestPixels(
float aXScale, float aYScale, nscoord aAppUnitsPerPixel) const {
return nsIntPoint(
NSToIntRoundUp(NSAppUnitsToDoublePixels(x, aAppUnitsPerPixel) * aXScale),
NSToIntRoundUp(NSAppUnitsToDoublePixels(y, aAppUnitsPerPixel) * aYScale));
}
inline nsIntPoint nsPoint::ToNearestPixels(nscoord aAppUnitsPerPixel) const {
return ScaleToNearestPixels(1.0f, 1.0f, aAppUnitsPerPixel);
}
inline nsPoint nsPoint::ScaleToOtherAppUnits(int32_t aFromAPP,
int32_t aToAPP) const {
if (aFromAPP != aToAPP) {
nsPoint point;
point.x = NSToCoordRound(NSCoordScale(x, aFromAPP, aToAPP));
point.y = NSToCoordRound(NSCoordScale(y, aFromAPP, aToAPP));
return point;
}
return *this;
}
inline nsPoint nsPoint::RemoveResolution(const float resolution) const {
if (resolution != 1.0f) {
nsPoint point;
point.x = NSToCoordRound(NSCoordToFloat(x) / resolution);
point.y = NSToCoordRound(NSCoordToFloat(y) / resolution);
return point;
}
return *this;
}
inline nsPoint nsPoint::ApplyResolution(const float resolution) const {
if (resolution != 1.0f) {
nsPoint point;
point.x = NSToCoordRound(NSCoordToFloat(x) * resolution);
point.y = NSToCoordRound(NSCoordToFloat(y) * resolution);
return point;
}
return *this;
}
// app units are integer multiples of pixels, so no rounding needed
inline nsPoint ToAppUnits(const nsIntPoint& aPoint, nscoord aAppUnitsPerPixel) {
return nsPoint(NSIntPixelsToAppUnits(aPoint.x, aAppUnitsPerPixel),
NSIntPixelsToAppUnits(aPoint.y, aAppUnitsPerPixel));
}
#endif /* NSPOINT_H */
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