[cairo] Possible Memory Leak Using Glitz Surfaces

[Charles Tuckey]

Hi,

I have found an extremely large memory leak that occurs when using cairo 
with glitz surfaces. I have attached a very simple program that 
demonstrates the leak. I've run the program (and demonstrated the leak) 
against two different video cards: one is an NVidia card using the 
latest NVidia driver and the other is a Matrox card using an Xi Graphics 
driver. The NVidia card is on a RedHat 9 system and the Matrox card is 
on a Redhat Enterprise 2.1 system.

The leak does not occur using pixman surfaces. Also, if the glitz 
surfaces are destroyed after each use, instead of using the same glitz 
surface all the time, the leak slows down by several orders of magnitude 
but is still quite noticeable.

I used valgrind to try and track down the source of the leak on the 
NVidia system. It does not appear to be in either cairo or glitz but in 
the GL driver supplied by NVidia for the video card. This makes me 
wonder if it is in fact a leak, or if I am using glitz incorrectly.

Any help or advice on this issue would be appreciated.

charlie
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