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assume scale argument is not null in qt_scaleForTransform()

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Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
This commit is contained in:
Ivailo Monev 2021-08-23 02:29:39 +03:00
parent e5cbe2e47e
commit 16c05a6d9a
1 changed files with 4 additions and 6 deletions
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10
src/gui/painting/qtransform.cpp
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@ -1531,16 +1531,15 @@ static inline bool lineTo_clipped(QPainterPath &path, const QTransform &transfor
Q_GUI_EXPORT
bool qt_scaleForTransform(const QTransform &transform, qreal *scale)
{
Q_ASSERT(scale);
const QTransform::TransformationType type = transform.type();
if (type <= QTransform::TxTranslate) {
if (scale)
*scale = 1;
*scale = 1;
return true;
} else if (type == QTransform::TxScale) {
const qreal xScale = qAbs(transform.m11());
const qreal yScale = qAbs(transform.m22());
if (scale)
*scale = qMax(xScale, yScale);
*scale = qMax(xScale, yScale);
return qFuzzyCompare(xScale, yScale);
}
@ -1548,8 +1547,7 @@ bool qt_scaleForTransform(const QTransform &transform, qreal *scale)
+ transform.m21() * transform.m21();
const qreal yScale = transform.m12() * transform.m12()
+ transform.m22() * transform.m22();
if (scale)
*scale = qSqrt(qMax(xScale, yScale));
*scale = qSqrt(qMax(xScale, yScale));
return type == QTransform::TxRotate && qFuzzyCompare(xScale, yScale);
}
static inline bool cubicTo_clipped(QPainterPath &path, const QTransform &transform, const QPointF &a, const QPointF &b, const QPointF &c, const QPointF &d, bool needsMoveTo)