nsSize.h
/* -*- 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 NSSIZE_H
#define NSSIZE_H
#include "nsCoord.h"
#include "mozilla/gfx/BaseSize.h"
// Maximum allowable size
#define NS_MAXSIZE nscoord_MAX
struct nsIntSize;
struct nsSize : public mozilla::gfx::BaseSize<nscoord, nsSize> {
typedef mozilla::gfx::BaseSize<nscoord, nsSize> Super;
nsSize() : Super() {}
nsSize(nscoord aWidth, nscoord aHeight) : Super(aWidth, aHeight) {}
inline nsIntSize ScaleToNearestPixels(float aXScale, float aYScale,
nscoord aAppUnitsPerPixel) const;
inline nsIntSize ToNearestPixels(nscoord aAppUnitsPerPixel) const;
// Converts this size from aFromAPP, an appunits per pixel ratio, to aToAPP.
inline nsSize ConvertAppUnits(int32_t aFromAPP, int32_t aToAPP) const;
};
struct nsIntSize : public mozilla::gfx::BaseSize<int32_t, nsIntSize> {
typedef mozilla::gfx::BaseSize<int32_t, nsIntSize> Super;
nsIntSize() : Super() {}
nsIntSize(int32_t aWidth, int32_t aHeight) : Super(aWidth, aHeight) {}
inline nsSize ToAppUnits(nscoord aAppUnitsPerPixel) const;
};
inline nsIntSize
nsSize::ScaleToNearestPixels(float aXScale, float aYScale,
nscoord aAppUnitsPerPixel) const
{
return nsIntSize(
NSToIntRoundUp(NSAppUnitsToDoublePixels(width, aAppUnitsPerPixel) * aXScale),
NSToIntRoundUp(NSAppUnitsToDoublePixels(height, aAppUnitsPerPixel) * aYScale));
}
inline nsIntSize
nsSize::ToNearestPixels(nscoord aAppUnitsPerPixel) const
{
return ScaleToNearestPixels(1.0f, 1.0f, aAppUnitsPerPixel);
}
inline nsSize
nsSize::ConvertAppUnits(int32_t aFromAPP, int32_t aToAPP) const {
if (aFromAPP != aToAPP) {
nsSize size;
size.width = NSToCoordRound(NSCoordScale(width, aFromAPP, aToAPP));
size.height = NSToCoordRound(NSCoordScale(height, aFromAPP, aToAPP));
return size;
}
return *this;
}
inline nsSize
nsIntSize::ToAppUnits(nscoord aAppUnitsPerPixel) const
{
return nsSize(NSIntPixelsToAppUnits(width, aAppUnitsPerPixel),
NSIntPixelsToAppUnits(height, aAppUnitsPerPixel));
}
#endif /* NSSIZE_H */