[cairo] Crash with very large image surface

[Federico Mena Quintero]

On Tue, 2006-05-23 at 10:32 -0400, Laszlo Pandy wrote:

> How can we use a matrix so shift the image surface? We want to keep the 
> waveform cached so we don't have to redraw it all the time. Is there any way 
> we can show only part of the cached image without using 
> cairo_set_source_surface() and cairo_paint() , which causes a crash?

Just paint the area you need; don't paint the whole waveform if you are
zoomed in.

If redrawing is slow, fix that, instead of patching a symptom.

  Federico