On Tue, Jan 19, 2010 at 10:21 AM, Younes Manton <youne...@gmail.com> wrote: > On Mon, Jan 18, 2010 at 9:10 PM, Chia-I Wu <olva...@gmail.com> wrote: >> On Tue, Jan 19, 2010 at 7:58 AM, Luca Barbieri <l...@luca-barbieri.com> >> wrote: >>> The XImage backend keeps a transfer permanently and map/unmaps to do >>> modifications. >>> However, Gallium transfers can be implemented by making and keeping a >>> copy of the surface, flushing it back on transfer destruction. >>> Thus, it should be fixed to create and destroy a transfer every time >>> it maps the surface. >> Thanks, that should be an easy fix. >> But I do wonder if a pipe transfer is always supposed to be temporary? Its >> operations, transfer_map and transfer_unmap, kind of hinted me that the pipe >> transfer can be used repeatedly. > It was my understanding that the transfer happened on destroy and that > was how the nouveau implementations were written. You can probably > find the original thread, IIRC it was Michael Danzer that did the > interface and softpipe. The ximage backend uses only softpipe and that is why I didn't notice that. softpipe seems to work well with permanent pipe transfers, but I think it is vital to use the interface correctly.
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