зеркало из https://github.com/mozilla/gecko-dev.git
80 строки
2.6 KiB
C
80 строки
2.6 KiB
C
/* -*- 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 NSPOINT_H
|
|
#define NSPOINT_H
|
|
|
|
#include "nsCoord.h"
|
|
#include "mozilla/gfx/BaseSize.h"
|
|
#include "mozilla/gfx/BasePoint.h"
|
|
#include "nsSize.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() : Super() {}
|
|
nsPoint(const nsPoint& aPoint) : Super(aPoint) {}
|
|
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
|
|
*/
|
|
MOZ_WARN_UNUSED_RESULT inline nsPoint
|
|
ScaleToOtherAppUnits(int32_t aFromAPP, int32_t aToAPP) 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;
|
|
}
|
|
|
|
// 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 */
|