Ah yes, good point... Keith ________________________________________ From: Roland Scheidegger [srol...@vmware.com] Sent: Monday, December 21, 2009 11:05 AM To: Keith Whitwell Cc: Alex Deucher; tom fogal; Mesa3D-Development Subject: Re: [Mesa3d-dev] Yet more r300g fear and loathing...
The draw module approach can only work if the texcoords are used directly for texture lookups, not for calculated coords (it should be possible to detect these cases though). Roland On 21.12.2009 19:32, Keith Whitwell wrote: > Faking those wrap modes is something that could be done either in the > draw module (by decomposing triangles and adjusting the texcoords) or > in the pixel shader (by adding logic to adjust the texcoord on a > per-pixel basis). Probably the draw-module approach is the easiest > to implement and is appropriate for an infrequently used path - you > still get hardware rasterization speeds, just a more expensive vertex > path. > > Keith ________________________________________ From: Alex Deucher > [alexdeuc...@gmail.com] Sent: Monday, December 21, 2009 10:18 AM To: > tom fogal Cc: Mesa3D-Development Subject: Re: [Mesa3d-dev] Yet more > r300g fear and loathing... > >> I work on real-time visualization apps; the one in particular I'm >> thinking of does texture sampling of potentially-NPOT textures via >> GLSL. If sampling a NPOT texture is not going to run in hardware, >> the app is useless. Further, our app keeps track of the amount of >> GL memory allocated for textures, FBOs and the like. If a texture >> is going to be silently extended, that messes with our management >> routines [1]. >> > > The hardware supports rectangular texture sampling. What's missing > is support for certain wrap modes and mipmaps with npot textures. > Neither of which are used that often. > > ------------------------------------------------------------------------------ > This SF.Net email is sponsored by the Verizon Developer Community > Take advantage of Verizon's best-in-class app development support A > streamlined, 14 day to market process makes app distribution fast and > easy Join now and get one step closer to millions of Verizon > customers http://p.sf.net/sfu/verizon-dev2dev > _______________________________________________ Mesa3d-dev mailing > list Mesa3d-dev@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/mesa3d-dev ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ Mesa3d-dev mailing list Mesa3d-dev@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mesa3d-dev
