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Cocoa: reimplement QPlatformBackingStore::scroll() 

Use qt_scrollImageInRect() from QtGui to accelerate scrolling in the
Cocoa plugin.

Change-Id: I8ad1377ed3307345f72d17c72049cec5472c97d3
Reviewed-by: Morten Johan Sørvig <morten.sorvig@nokia.com>
bb10
Bradley T. Hughes 2012-03-20 13:27:07 +01:00 committed by Qt by Nokia
parent b2363a935c
commit eac97c5830
2 changed files with 13 additions and 0 deletions
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1
src/plugins/platforms/cocoa/qcocoabackingstore.h
View File

@ -60,6 +60,7 @@ public:
QPaintDevice *paintDevice();
void flush(QWindow *widget, const QRegion &region, const QPoint &offset);
void resize (const QSize &size, const QRegion &);
bool scroll(const QRegion &area, int dx, int dy);
private:
QCocoaWindow *m_cocoaWindow;

12
src/plugins/platforms/cocoa/qcocoabackingstore.mm
View File

@ -97,4 +97,16 @@ void QCocoaBackingStore::resize(const QSize &size, const QRegion &)
[static_cast<QNSView *>(m_cocoaWindow->m_contentView) setImage:m_image];
}
bool QCocoaBackingStore::scroll(const QRegion &area, int dx, int dy)
{
extern void qt_scrollRectInImage(QImage &img, const QRect &rect, const QPoint &offset);
QPoint qpoint(dx, dy);
const QVector<QRect> qrects = area.rects();
for (int i = 0; i < qrects.count(); ++i) {
const QRect &qrect = qrects.at(i);
qt_scrollRectInImage(*m_image, qrect, qpoint);
}
return true;
}
QT_END_NAMESPACE