1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/src/nsPoint.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,82 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef NSPOINT_H
1.10 +#define NSPOINT_H
1.11 +
1.12 +#include "nsCoord.h"
1.13 +#include "mozilla/gfx/BaseSize.h"
1.14 +#include "mozilla/gfx/BasePoint.h"
1.15 +#include "nsSize.h"
1.16 +
1.17 +struct nsIntPoint;
1.18 +
1.19 +// nsPoint represents a point in app units.
1.20 +
1.21 +struct nsPoint : public mozilla::gfx::BasePoint<nscoord, nsPoint> {
1.22 + typedef mozilla::gfx::BasePoint<nscoord, nsPoint> Super;
1.23 +
1.24 + nsPoint() : Super() {}
1.25 + nsPoint(const nsPoint& aPoint) : Super(aPoint) {}
1.26 + nsPoint(nscoord aX, nscoord aY) : Super(aX, aY) {}
1.27 +
1.28 + inline nsIntPoint ScaleToNearestPixels(float aXScale, float aYScale,
1.29 + nscoord aAppUnitsPerPixel) const;
1.30 + inline nsIntPoint ToNearestPixels(nscoord aAppUnitsPerPixel) const;
1.31 +
1.32 + // Converts this point from aFromAPP, an appunits per pixel ratio, to aToAPP.
1.33 + inline nsPoint ConvertAppUnits(int32_t aFromAPP, int32_t aToAPP) const;
1.34 +};
1.35 +
1.36 +// nsIntPoint represents a point in one of the types of pixels.
1.37 +// Uses of nsIntPoint should eventually be converted to CSSIntPoint,
1.38 +// LayoutDeviceIntPoint, etc. (see layout/base/Units.h).
1.39 +
1.40 +struct nsIntPoint : public mozilla::gfx::BasePoint<int32_t, nsIntPoint> {
1.41 + typedef mozilla::gfx::BasePoint<int32_t, nsIntPoint> Super;
1.42 +
1.43 + nsIntPoint() : Super() {}
1.44 + nsIntPoint(const nsIntPoint& aPoint) : Super(aPoint) {}
1.45 + nsIntPoint(int32_t aX, int32_t aY) : Super(aX, aY) {}
1.46 +
1.47 + inline nsPoint ToAppUnits(nscoord aAppUnitsPerPixel) const;
1.48 +};
1.49 +
1.50 +inline nsIntPoint
1.51 +nsPoint::ScaleToNearestPixels(float aXScale, float aYScale,
1.52 + nscoord aAppUnitsPerPixel) const
1.53 +{
1.54 + return nsIntPoint(
1.55 + NSToIntRoundUp(NSAppUnitsToDoublePixels(x, aAppUnitsPerPixel) * aXScale),
1.56 + NSToIntRoundUp(NSAppUnitsToDoublePixels(y, aAppUnitsPerPixel) * aYScale));
1.57 +}
1.58 +
1.59 +inline nsIntPoint
1.60 +nsPoint::ToNearestPixels(nscoord aAppUnitsPerPixel) const
1.61 +{
1.62 + return ScaleToNearestPixels(1.0f, 1.0f, aAppUnitsPerPixel);
1.63 +}
1.64 +
1.65 +inline nsPoint
1.66 +nsPoint::ConvertAppUnits(int32_t aFromAPP, int32_t aToAPP) const
1.67 +{
1.68 + if (aFromAPP != aToAPP) {
1.69 + nsPoint point;
1.70 + point.x = NSToCoordRound(NSCoordScale(x, aFromAPP, aToAPP));
1.71 + point.y = NSToCoordRound(NSCoordScale(y, aFromAPP, aToAPP));
1.72 + return point;
1.73 + }
1.74 + return *this;
1.75 +}
1.76 +
1.77 +// app units are integer multiples of pixels, so no rounding needed
1.78 +inline nsPoint
1.79 +nsIntPoint::ToAppUnits(nscoord aAppUnitsPerPixel) const
1.80 +{
1.81 + return nsPoint(NSIntPixelsToAppUnits(x, aAppUnitsPerPixel),
1.82 + NSIntPixelsToAppUnits(y, aAppUnitsPerPixel));
1.83 +}
1.84 +
1.85 +#endif /* NSPOINT_H */
