diff options
| -rw-r--r-- | src/gui/painting/qtransform.cpp | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/src/gui/painting/qtransform.cpp b/src/gui/painting/qtransform.cpp index 385fde1..7ca3b79 100644 --- a/src/gui/painting/qtransform.cpp +++ b/src/gui/painting/qtransform.cpp @@ -76,7 +76,9 @@ QT_BEGIN_NAMESPACE nx = affine._m11 * FX_ + affine._m21 * FY_ + affine._dx; \ ny = affine._m12 * FX_ + affine._m22 * FY_ + affine._dy; \ if (t == TxProject) { \ - qreal w = 1./(m_13 * FX_ + m_23 * FY_ + m_33); \ + qreal w = (m_13 * FX_ + m_23 * FY_ + m_33); \ + if (w < Q_NEAR_CLIP) w = Q_NEAR_CLIP; \ + w = 1./w; \ nx *= w; \ ny *= w; \ } \ @@ -1800,7 +1802,7 @@ QRect QTransform::mapRect(const QRect &rect) const y -= h; } return QRect(x, y, w, h); - } else if (t < TxProject) { + } else { // see mapToPolygon for explanations of the algorithm. qreal x = 0, y = 0; MAP(rect.left(), rect.top(), x, y); @@ -1824,10 +1826,6 @@ QRect QTransform::mapRect(const QRect &rect) const xmax = qMax(xmax, x); ymax = qMax(ymax, y); return QRect(qRound(xmin), qRound(ymin), qRound(xmax)-qRound(xmin), qRound(ymax)-qRound(ymin)); - } else { - QPainterPath path; - path.addRect(rect); - return map(path).boundingRect().toRect(); } } @@ -1870,7 +1868,7 @@ QRectF QTransform::mapRect(const QRectF &rect) const y -= h; } return QRectF(x, y, w, h); - } else if (t < TxProject) { + } else { qreal x = 0, y = 0; MAP(rect.x(), rect.y(), x, y); qreal xmin = x; @@ -1893,10 +1891,6 @@ QRectF QTransform::mapRect(const QRectF &rect) const xmax = qMax(xmax, x); ymax = qMax(ymax, y); return QRectF(xmin, ymin, xmax-xmin, ymax - ymin); - } else { - QPainterPath path; - path.addRect(rect); - return map(path).boundingRect(); } } |