On Sun, 13 Aug 2006 02:17:40 +0200 Rune Petersen <[EMAIL PROTECTED]> wrote:
> Roland Scheidegger wrote: > > Rune Petersen wrote: > >> Roland Scheidegger wrote: > >>> Adam K Kirchhoff wrote: > >>>> Just thought I'd post some updated benchmarks of Doom3. These > >>>> were all run with the first timedemo at 640x480, and (for the > >>>> open source drivers) with ColorTiling turned on in the xorg.conf > >>>> file. I'll list all tests with the open source drivers first: > >>>> > >>>> x700 + r300 (with arb renderer) - 5.5 FPS (There's not much point > >>>> in testing it with the r200 or arb2 renderers at the moment.) > >>> What's the problem with arb2? > >> > >> fragment.position input is not implemented yet. fglrx driver parses > >> it from VP to FP via a texcoord route. I've been hitting my head on > >> this for some time. Only got as far as only getting a soft lockup > >> which isn't very useful. > > That kinda makes sense. On r200 you could already pass vertex data > > to the fragment registers (but you couldn't use position as input), > > so the data was interpolated by the texcoord interpolator but > > texture lookup was disabled (see the ATI_fs spec / r200 dri > > implementation). At first sight looks like a similar mechanism > > might be used by r300 I guess, interpolating position or texcoords > > isn't too different is it? > > > > I've had been looking into this, and the vertex shader is supplying > the position to the fragment shader as a texcoord, the only apparent > difference in shader setup between a position and a real texcoord, is > a real texcoord is supplied as input for the vertex shader. > > > I would really like to capture the vertex program of > program/fp/tri-depth and the fglrx driver. > > But I'm betting the vertex shader is capable of writing to a texcoord. > All I need is a safe way for the vertex shader code to know if the > fragment shader needs the position. > > Any help with this would be great. Bug #8056 patch can do this. Take a look at r300_select_vertex_shader(). -- Aapo Tahkola ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
