diff options
Diffstat (limited to 'src/gui/painting/qregion_mac.cpp')
| -rw-r--r-- | src/gui/painting/qregion_mac.cpp | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/gui/painting/qregion_mac.cpp b/src/gui/painting/qregion_mac.cpp index b57f23453..9b0e99fd1 100644 --- a/src/gui/painting/qregion_mac.cpp +++ b/src/gui/painting/qregion_mac.cpp @@ -155,6 +155,44 @@ RgnHandle QRegion::toQDRgn() const } return rgnHandle; } + +/*! + \internal + Create's a RegionHandle, it's the caller's responsibility to release. + Returns 0 if the QRegion overflows. +*/ +RgnHandle QRegion::toQDRgnForUpdate_sys() const +{ + RgnHandle rgnHandle = qt_mac_get_rgn(); + if(d->qt_rgn && d->qt_rgn->numRects) { + RgnHandle tmp_rgn = qt_mac_get_rgn(); + int n = d->qt_rgn->numRects; + const QRect *qt_r = (n == 1) ? &d->qt_rgn->extents : d->qt_rgn->rects.constData(); + while (n--) { + + // detect overflow. Tested for use with HIViewSetNeedsDisplayInRegion + // in QWidgetPrivate::update_sys(). + enum { HIViewSetNeedsDisplayInRegionOverflow = 10000 }; // empirically determined conservative value + qDebug() << qt_r->x() << qt_r->y() << qt_r->right() << qt_r->bottom(); + if (qt_r->right() > HIViewSetNeedsDisplayInRegionOverflow || qt_r->bottom() > HIViewSetNeedsDisplayInRegionOverflow) { + qt_mac_dispose_rgn(tmp_rgn); + qt_mac_dispose_rgn(rgnHandle); + return 0; + } + + SetRectRgn(tmp_rgn, + qMax(SHRT_MIN, qt_r->x()), + qMax(SHRT_MIN, qt_r->y()), + qMin(SHRT_MAX, qt_r->right() + 1), + qMin(SHRT_MAX, qt_r->bottom() + 1)); + UnionRgn(rgnHandle, tmp_rgn, rgnHandle); + ++qt_r; + } + qt_mac_dispose_rgn(tmp_rgn); + } + return rgnHandle; +} + #endif #if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5) |