mirror of
https://github.com/classilla/tenfourfox.git
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107 lines
3.3 KiB
C
107 lines
3.3 KiB
C
/* -*- Mode: C++; tab-width: 2; 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 NSPOINT_H
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#define NSPOINT_H
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#include "nsCoord.h"
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#include "mozilla/gfx/BaseSize.h"
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#include "mozilla/gfx/BasePoint.h"
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#include "nsSize.h"
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#include "mozilla/gfx/Point.h"
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// nsIntPoint represents a point in one of the types of pixels.
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// Uses of nsIntPoint should eventually be converted to CSSIntPoint,
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// LayoutDeviceIntPoint, etc. (see layout/base/Units.h).
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typedef mozilla::gfx::IntPoint nsIntPoint;
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// nsPoint represents a point in app units.
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struct nsPoint : public mozilla::gfx::BasePoint<nscoord, nsPoint> {
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typedef mozilla::gfx::BasePoint<nscoord, nsPoint> Super;
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nsPoint() : Super() {}
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nsPoint(const nsPoint& aPoint) : Super(aPoint) {}
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nsPoint(nscoord aX, nscoord aY) : Super(aX, aY) {}
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inline nsIntPoint ScaleToNearestPixels(float aXScale, float aYScale,
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nscoord aAppUnitsPerPixel) const;
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inline nsIntPoint ToNearestPixels(nscoord aAppUnitsPerPixel) const;
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/**
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* Return this point scaled to a different appunits per pixel (APP) ratio.
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* @param aFromAPP the APP to scale from
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* @param aToAPP the APP to scale to
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*/
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MOZ_WARN_UNUSED_RESULT inline nsPoint
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ScaleToOtherAppUnits(int32_t aFromAPP, int32_t aToAPP) const;
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MOZ_WARN_UNUSED_RESULT inline nsPoint
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RemoveResolution(const float resolution) const;
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MOZ_WARN_UNUSED_RESULT inline nsPoint
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ApplyResolution(const float resolution) const;
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};
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inline nsPoint ToAppUnits(const nsIntPoint& aPoint, nscoord aAppUnitsPerPixel);
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inline nsIntPoint
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nsPoint::ScaleToNearestPixels(float aXScale, float aYScale,
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nscoord aAppUnitsPerPixel) const
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{
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return nsIntPoint(
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NSToIntRoundUp(NSAppUnitsToDoublePixels(x, aAppUnitsPerPixel) * aXScale),
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NSToIntRoundUp(NSAppUnitsToDoublePixels(y, aAppUnitsPerPixel) * aYScale));
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}
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inline nsIntPoint
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nsPoint::ToNearestPixels(nscoord aAppUnitsPerPixel) const
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{
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return ScaleToNearestPixels(1.0f, 1.0f, aAppUnitsPerPixel);
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}
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inline nsPoint
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nsPoint::ScaleToOtherAppUnits(int32_t aFromAPP, int32_t aToAPP) const
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{
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if (aFromAPP != aToAPP) {
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nsPoint point;
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point.x = NSToCoordRound(NSCoordScale(x, aFromAPP, aToAPP));
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point.y = NSToCoordRound(NSCoordScale(y, aFromAPP, aToAPP));
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return point;
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}
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return *this;
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}
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inline nsPoint
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nsPoint::RemoveResolution(const float resolution) const {
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if (resolution != 1.0f) {
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nsPoint point;
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point.x = NSToCoordRound(NSCoordToFloat(x) / resolution);
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point.y = NSToCoordRound(NSCoordToFloat(y) / resolution);
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return point;
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}
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return *this;
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}
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inline nsPoint
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nsPoint::ApplyResolution(const float resolution) const {
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if (resolution != 1.0f) {
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nsPoint point;
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point.x = NSToCoordRound(NSCoordToFloat(x) * resolution);
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point.y = NSToCoordRound(NSCoordToFloat(y) * resolution);
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return point;
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}
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return *this;
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}
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// app units are integer multiples of pixels, so no rounding needed
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inline nsPoint
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ToAppUnits(const nsIntPoint& aPoint, nscoord aAppUnitsPerPixel)
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{
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return nsPoint(NSIntPixelsToAppUnits(aPoint.x, aAppUnitsPerPixel),
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NSIntPixelsToAppUnits(aPoint.y, aAppUnitsPerPixel));
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}
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#endif /* NSPOINT_H */
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