gecko-dev/gfx/thebes/gfxPoint.h

51 строка
1.7 KiB
C

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* 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 GFX_POINT_H
#define GFX_POINT_H
#include "nsMathUtils.h"
#include "mozilla/gfx/BaseSize.h"
#include "mozilla/gfx/BasePoint.h"
#include "nsSize.h"
#include "nsPoint.h"
#include "gfxTypes.h"
typedef nsIntSize gfxIntSize;
struct THEBES_API gfxSize : public mozilla::gfx::BaseSize<gfxFloat, gfxSize> {
typedef mozilla::gfx::BaseSize<gfxFloat, gfxSize> Super;
gfxSize() : Super() {}
gfxSize(gfxFloat aWidth, gfxFloat aHeight) : Super(aWidth, aHeight) {}
gfxSize(const nsIntSize& aSize) : Super(aSize.width, aSize.height) {}
};
struct THEBES_API gfxPoint : public mozilla::gfx::BasePoint<gfxFloat, gfxPoint> {
typedef mozilla::gfx::BasePoint<gfxFloat, gfxPoint> Super;
gfxPoint() : Super() {}
gfxPoint(gfxFloat aX, gfxFloat aY) : Super(aX, aY) {}
gfxPoint(const nsIntPoint& aPoint) : Super(aPoint.x, aPoint.y) {}
// Round() is *not* rounding to nearest integer if the values are negative.
// They are always rounding as floor(n + 0.5).
// See https://bugzilla.mozilla.org/show_bug.cgi?id=410748#c14
// And if you need similar method which is using NS_round(), you should
// create new |RoundAwayFromZero()| method.
gfxPoint& Round() {
x = floor(x + 0.5);
y = floor(y + 0.5);
return *this;
}
bool WithinEpsilonOf(const gfxPoint& aPoint, gfxFloat aEpsilon) {
return fabs(aPoint.x - x) < aEpsilon && fabs(aPoint.y - y) < aEpsilon;
}
};
#endif /* GFX_POINT_H */