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Diffstat (limited to 'src/gui/painting/qtransform.h')
| -rw-r--r-- | src/gui/painting/qtransform.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/gui/painting/qtransform.h b/src/gui/painting/qtransform.h index de7ebcd01f..c76409b232 100644 --- a/src/gui/painting/qtransform.h +++ b/src/gui/painting/qtransform.h @@ -257,6 +257,8 @@ inline qreal QTransform::dy() const inline QTransform &QTransform::operator*=(qreal num) { + if (num == 1.) + return *this; affine._m11 *= num; affine._m12 *= num; m_13 *= num; @@ -271,11 +273,15 @@ inline QTransform &QTransform::operator*=(qreal num) } inline QTransform &QTransform::operator/=(qreal div) { + if (div == 0) + return *this; div = 1/div; return operator*=(div); } inline QTransform &QTransform::operator+=(qreal num) { + if (num == 0) + return *this; affine._m11 += num; affine._m12 += num; m_13 += num; @@ -290,6 +296,8 @@ inline QTransform &QTransform::operator+=(qreal num) } inline QTransform &QTransform::operator-=(qreal num) { + if (num == 0) + return *this; affine._m11 -= num; affine._m12 -= num; m_13 -= num; |