Fix slowdown regression in QGraphicsItem::ItemCoordinateCache

Right before Qt 4.5.0 was released, Alexis and I submitted change
7e9b000ee418ef2d9c8fadb2c6b8870e0335bd5e, which accidentally introduced
a rounding error causing items whose bounding rect contains fractional
numbers (e.g., QRectF(-0.5, -0.5, 11, 11)), to always be drawn with a
one-pixel strech even if otherwise untransformed. This caused a
significant slowdown for pixmap items and any shape item that uses
almost any pen width != 0, if they enable ItemCoordinateCache.

The fix is to consistently use the aligned rectangle both when generating
the cache pixmap and when drawing it.

Reviewed-by: Alexis

0 files changed, 0 insertions, 0 deletions