| | |
| 5075 | 5075 | } |
| 5076 | 5076 | |
| 5077 | 5077 | /*! |
| \internal |
|
| Scrolls \a rect in \a pix by \a dx, \a dy. |
|
| ### This can be done much more efficiently by using XCopyArea on X11 with |
| the same dst and src, and through moving pixels in the raster engine. It |
| can probably also be done much better on the other paint engines. |
| */ |
| void _q_scrollPixmap(QPixmap *pix, const QRect &rect, int dx, int dy) |
| { |
| #if 0 |
| QPainter painter(pix); |
| painter.setClipRect(rect); |
| painter.drawPixmap(rect.translated(dx, dy), *pix, rect); |
| painter.end(); |
| #elif defined Q_WS_X11 |
| GC gc = XCreateGC(X11->display, pix->handle(), 0, 0); |
|
| XRectangle xrect; |
| xrect.x = rect.x(); |
| xrect.y = rect.y(); |
| xrect.width = rect.width(); |
| xrect.height = rect.height(); |
| XSetClipRectangles(X11->display, gc, 0, 0, &xrect, 1, YXBanded); |
|
| XCopyArea(X11->display, pix->handle(), pix->handle(), gc, |
| rect.x(), rect.y(), rect.width(), rect.height(), |
| rect.x()+dx, rect.y()+dy); |
| XFreeGC(X11->display, gc); |
| #else |
| QPixmap newPix = *pix; |
| QPainter painter(&newPix); |
| painter.setClipRect(rect); |
| painter.drawPixmap(rect.translated(dx, dy), *pix, rect); |
| painter.end(); |
| *pix = newPix; |
| #endif |
| } |
|
| /*! |
| 5118 | 5078 | \since 4.4 |
| 5119 | 5079 | Scrolls the contents of \a rect by \a dx, \a dy. If \a rect is a null rect |
| 5120 | 5080 | (the default), the item's bounding rect is scrolled. |
| … | … | |
| 5114 | 5114 | QRectF br = boundingRect().adjusted(-adjust, -adjust, adjust, adjust); |
| 5115 | 5115 | QRect irect = rect.toRect().translated(-br.x(), -br.y()); |
| 5116 | 5116 | |
| _q_scrollPixmap(&pix, irect, dx, dy); |
| pix.scroll(dx, dy, irect); |
| 5118 | 5118 | |
| 5119 | 5119 | QPixmapCache::replace(c->key, pix); |
| 5120 | 5120 | |
