[cairo] Cairo double buffer example

[Davide Calaminici]

Hello everyone,

i'm trying to make a simple screensaver in cairo. The problem that cairo -
for the system i use - is not yet hardware accelerated and the drawing
result very slow. There is an example, somewhere, that explain how to create
and use a double buffer? Draw in a buffer, then swap to the main buffer on
video. I hope this can increase the speed.


Thank you very much,

Best regards
Davide Calaminici
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