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71 lines
2.3 KiB
C
71 lines
2.3 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 NSSIZE_H
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#define NSSIZE_H
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#include "nsCoord.h"
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#include "mozilla/gfx/BaseSize.h"
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#include "mozilla/gfx/Point.h"
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// Maximum allowable size
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#define NS_MAXSIZE nscoord_MAX
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typedef mozilla::gfx::IntSize nsIntSize;
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struct nsSize : public mozilla::gfx::BaseSize<nscoord, nsSize> {
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typedef mozilla::gfx::BaseSize<nscoord, nsSize> Super;
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nsSize() : Super() {}
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nsSize(nscoord aWidth, nscoord aHeight) : Super(aWidth, aHeight) {}
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inline mozilla::gfx::IntSize ScaleToNearestPixels(float aXScale, float aYScale,
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nscoord aAppUnitsPerPixel) const;
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inline mozilla::gfx::IntSize ToNearestPixels(nscoord aAppUnitsPerPixel) const;
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/**
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* Return this size 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 nsSize
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ScaleToOtherAppUnits(int32_t aFromAPP, int32_t aToAPP) const;
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};
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inline mozilla::gfx::IntSize
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nsSize::ScaleToNearestPixels(float aXScale, float aYScale,
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nscoord aAppUnitsPerPixel) const
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{
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return mozilla::gfx::IntSize(
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NSToIntRoundUp(NSAppUnitsToDoublePixels(width, aAppUnitsPerPixel) * aXScale),
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NSToIntRoundUp(NSAppUnitsToDoublePixels(height, aAppUnitsPerPixel) * aYScale));
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}
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inline mozilla::gfx::IntSize
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nsSize::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 nsSize
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nsSize::ScaleToOtherAppUnits(int32_t aFromAPP, int32_t aToAPP) const {
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if (aFromAPP != aToAPP) {
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nsSize size;
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size.width = NSToCoordRound(NSCoordScale(width, aFromAPP, aToAPP));
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size.height = NSToCoordRound(NSCoordScale(height, aFromAPP, aToAPP));
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return size;
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}
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return *this;
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}
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inline nsSize
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IntSizeToAppUnits(mozilla::gfx::IntSize aSize, nscoord aAppUnitsPerPixel)
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{
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return nsSize(NSIntPixelsToAppUnits(aSize.width, aAppUnitsPerPixel),
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NSIntPixelsToAppUnits(aSize.height, aAppUnitsPerPixel));
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}
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#endif /* NSSIZE_H */
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