On 23 Jul, this message from Guido Fiala echoed through cyberspace: >> moving YUV across the bus, but it should use no CPU. > > Yes, so i thought. But that would mean, that the XServer loads it's data > directly from the v4l device itself (mmap-io or direct write into AGP-memory?) > The latter should work if the ximage is a contigous array in AGP memory only.
No, it's the video input hardware that pushes the data with DMA to an off-screen VRAM memory area, and the graphic chip then copies and color-converts on the fly to the visible window. Cheers Michel ------------------------------------------------------------------------- Michel Lanners | " Read Philosophy. Study Art. 23, Rue Paul Henkes | Ask Questions. Make Mistakes. L-1710 Luxembourg | email [EMAIL PROTECTED] | http://www.cpu.lu/~mlan | Learn Always. " _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert
