Hi Jim, > I don't understand. You are checking to see if the line is inside the clip, > but your test will think that something is inside the clip when it is not so > the "fast path" code will be used for lines outside the clip. If the case > can handle lines outside the clip then why test at all?
The xrender pipeline uses bresenham to transform diagonal lines into a lists of rectangles, without clipping it was possible with large line-coordinates to cause an OOM because of the huge amount of rectangles generated. The corner-case of a complex clip where both line end-points are contained would cause unnecessary rectangles to be generated, but still only a few thanks to the component clip. The unnecessary rects would be clipped away by the XServer later. - Clemens
