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put the to pixmap in the center if the two pixmap have a different size

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svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=866779
This commit is contained in:
Marco Martin 2008-10-01 21:40:08 +00:00
parent 9d616e85b8
commit 7d9e7a74cb
1 changed files with 7 additions and 3 deletions
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10
paintutils.cpp
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@ -127,6 +127,10 @@ QPixmap transition(const QPixmap &from, const QPixmap &to, qreal amount)
QColor color;
color.setAlphaF(amount);
//paint to in the center of from
QRect toRect = to.rect();
toRect.moveCenter(from.rect().center());
// If the native paint engine supports Porter/Duff compositing and CompositionMode_Plus
if (from.paintEngine()->hasFeature(QPaintEngine::PorterDuff) &&
from.paintEngine()->hasFeature(QPaintEngine::BlendModes)) {
@ -143,7 +147,7 @@ QPixmap transition(const QPixmap &from, const QPixmap &to, qreal amount)
p.setCompositionMode(QPainter::CompositionMode_DestinationOut);
p.fillRect(under.rect(), color);
p.setCompositionMode(QPainter::CompositionMode_Plus);
p.drawPixmap(0, 0, over);
p.drawPixmap(toRect.topLeft(), over);
p.end();
return under;
@ -190,7 +194,7 @@ QPixmap transition(const QPixmap &from, const QPixmap &to, qreal amount)
// Add source * opacity to the destination
XRenderComposite(dpy, PictOpAdd, source.x11PictureHandle(), alpha,
destination.x11PictureHandle(),
0, 0, 0, 0, 0, 0, destination.width(), destination.height());
toRect.x(), toRect.y(), 0, 0, 0, 0, destination.width(), destination.height());
XRenderFreePicture(dpy, alpha);
return destination;
@ -211,7 +215,7 @@ QPixmap transition(const QPixmap &from, const QPixmap &to, qreal amount)
p.setCompositionMode(QPainter::CompositionMode_DestinationOut);
p.fillRect(under.rect(), color);
p.setCompositionMode(QPainter::CompositionMode_Plus);
p.drawImage(0, 0, over);
p.drawImage(toRect.topLeft(), over);
p.end();
return QPixmap::fromImage(under);