Hi, Dave, Dave Airlie wrote: > Hey, > > So I've been playing with radeon FBOs and have run into a problem with how > to allow apps to get an FBOs that isn't swrast fallback :-) > > radeons can by default render to ARGB8888, ARGB4444, RGB565 mostly, now in > this case when the app asks for a texture format of GL_RGBA, > GL_UNSIGNED_BYTE, we return by default a texture format, of > &_mesa_texformat_rgba8888_rev > > This allows us to do memcpy texture uploads in theory, however > when it comes time to render to that texture, I have to go hit a sw > fallback which sucks badly. > > I see my options as > a) apps are smart, ignore problem and move on. > b) pick FBO friendly texture formats by default at the expense of textures > c) magically change the texture format when I realise something is > rendering to it (is this possible any ideas?) > d) at least for r300, hack up the fragment shader to swizzle the outputs > though I think for dest blending this might not work like I think it > would. > > hopes nobody tells me the FBO spec covers this and I'm lazy :) > > Openchrome implements a), as most apps we've worked with so far hasn't seen this problem. I'm not completely sure what the Intel drivers do (Brian can perhaps fill in on this), but I think b).
/Thomas > Dave. > > ------------------------------------------------------------------------------ > Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are > powering Web 2.0 with engaging, cross-platform capabilities. Quickly and > easily build your RIAs with Flex Builder, the Eclipse(TM)based development > software that enables intelligent coding and step-through debugging. > Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com > _______________________________________________ > Mesa3d-dev mailing list > Mesa3d-dev@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/mesa3d-dev > ------------------------------------------------------------------------------ Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com _______________________________________________ Mesa3d-dev mailing list Mesa3d-dev@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mesa3d-dev
