diff options
| -rw-r--r-- | src/gui/painting/qpaintengine_blitter.cpp | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/src/gui/painting/qpaintengine_blitter.cpp b/src/gui/painting/qpaintengine_blitter.cpp index c2cab0c..d4eb619 100644 --- a/src/gui/painting/qpaintengine_blitter.cpp +++ b/src/gui/painting/qpaintengine_blitter.cpp @@ -330,11 +330,23 @@ void QBlitterPaintEnginePrivate::clipAndDrawPixmap(const QRectF &clip, const QRe return; QRectF source = sr; if (intersectedRect.size() != target.size()) { - qreal deltaTop = target.top() - intersectedRect.top(); - qreal deltaLeft = target.left() - intersectedRect.left(); - qreal deltaBottom = target.bottom() - intersectedRect.bottom(); - qreal deltaRight = target.right() - intersectedRect.right(); - source.adjust(-deltaLeft, -deltaTop, -deltaRight, -deltaBottom); + if (sr.size() == target.size()) { + // no resize + qreal deltaTop = target.top() - intersectedRect.top(); + qreal deltaLeft = target.left() - intersectedRect.left(); + qreal deltaBottom = target.bottom() - intersectedRect.bottom(); + qreal deltaRight = target.right() - intersectedRect.right(); + source.adjust(-deltaLeft, -deltaTop, -deltaRight, -deltaBottom); + } else { + // resize case + qreal hFactor = sr.size().width() / target.size().width(); + qreal vFactor = sr.size().height() / target.size().height(); + qreal deltaTop = (target.top() - intersectedRect.top()) * vFactor; + qreal deltaLeft = (target.left() - intersectedRect.left()) * hFactor; + qreal deltaBottom = (target.bottom() - intersectedRect.bottom()) * vFactor; + qreal deltaRight = (target.right() - intersectedRect.right()) * hFactor; + source.adjust(-deltaLeft, -deltaTop, -deltaRight, -deltaBottom); + } } pmData->unmarkRasterOverlay(intersectedRect); pmData->blittable()->drawPixmap(intersectedRect, pm, source); |