On Fri, Oct 10, 2003 at 12:24:56PM +0100, Keith Whitwell wrote: | | >No. No preservation is done. We need to invalidate everything. | | That's a problem, as the only way we can do things like accelerated | CopyTexSubImage() and single-copy textures is if the FB contents are | guarenteed to be preserved.
Yes, it's extremely important. Besides performance loss and memory bloat, the lack of framebuffer memory preservation on Windows has forced some new extensions to have ugly semantics. See the vertex buffer object extension http://oss.sgi.com/projects/ogl-sample/registry/ARB/vertex_buffer_object.txt for one example. This is one more case in which the Windows people did the wrong thing, and an opportunity for other systems to be better. Allen ------------------------------------------------------- This SF.net email is sponsored by: SF.net Giveback Program. SourceForge.net hosts over 70,000 Open Source Projects. See the people who have HELPED US provide better services: Click here: http://sourceforge.net/supporters.php _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
