This is a cool set of tests so I've pushed this. If there happens to be anything wrong with it, we'll fix it. Marek <div class="gmail_quote">On Thu, Aug 26, 2010 at 5:19 PM, Luca Barbieri <<a href="mailto:luca@luca-barbieri.com">luca@luca-barbieri.com</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">This in an updated version of the test I posted, now split into 8 tests sharing a common header file. It now features testing of multiple render targets and fog. Test output logs and results on GeForce 8xxx, GTX 2xx or ideally GTX 4xx with the proprietary drivers would be really welcome. The files are put in "spec/arb_color_buffer_float" with the idea of starting a convention of writing testsuites for each new extension to be implemented in Mesa, putting it in "spec/<extension_name>". The tests now fail on any bugs in the default mode. If "-xfail" is passed, then known bugs on ATI and nVidia will be ignored, and all tests will then succeed. The driver bugs don't seem due (solely) to hardware limitations, but may be due to software fallbacks being improperly implemented. There are two areas where the specification seems unclear, as far as I understand it. I'm not sure what the process to ask for clarification is, and suggestions would be welcome here. This first issue is whether, when fragment clamping is set to FIXED_ONLY and the FBO has some fixed-point and some floating-point buffers attached, gl_FragData[n] is never clamped, or is clamped only for the fixed point buffers. Note that while blending on fixed-point clamps the color anyway, alpha test and polygon smoothing happen before blending, and should be affected by whether gl_FragData[n] is clamped or not.