Adam Richter <[EMAIL PROTECTED]> writes: > I want to suggest a way we could eliminate a substantial > amount of data copying when playing video on X servers that do not > provide hardware video windows, including servers that offer the X > shared memory extension. In common situations, I suspect that this > could reduce memory bus utilization for playing video by more than a > factor of two.
It is not a bad idea, and I agree it would be useful in some common cases. A straigtforward implementation would be to simply add YUV support to the XRender extension. I believe there is consensus that this would be a useful thing to have. Pixman, the software implementation of XRender already has support for YUV formats, so all that is really required is to just export YUV picture formats through the XRender protocol. One issue is that it is somewhat unclear how you can *write* to the YUV formats, but XRender already other types of read-only pictures, so maybe a YUV picture should just be source-only. The software implementation is quite slow currently, but there is MMX code somewhere, that could be dusted off and made to work. Søren _______________________________________________ xorg mailing list xorg@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/xorg
