[cairo] Clipping bug in image surface

Søren Sandmann sandmann at cs.au.dk
Thu Sep 27 01:30:09 PDT 2012

This program:


demonstrates a bug that is present at least in master and 1.12.2. 

The program draws two rectangles, paints them white, and then clips to
those rectangles. Then it draws a green quadrilateral, which is supposed
to be clipped to the white area. By resizing the window you can see that
this is not the case in some situations.

If you set the "const int image" variable to 0, the program will use the
X backend. The bug does not appear in that case.


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