> GL_MAX_SAMPLES tells you how many samples you can ask for from a > multisample renderbuffer (GL 3.0 spec page 285), while to ask about > the > number of samples in a particular GLX visuals you have to check the > GLX_SAMPLE_BUFFERS_ARB of the visual (GL_ARB_multisample spec). We > currently expose GL_MAX_SAMPLES of 4 (GL 3.0 spec page 391), but > that's > a lie and if you ask for a 4-sample renderbuffer we don't actually > multisample it. We don't expose any GLX visuals with nonzero > GLX_SAMPLE_BUFFERS_ARB, which is conformant but disappointing.
Thanks for that information. WebGL antialiasing relies in multisample renderbuffers (ARB_framebuffer_multisample), not on multisample GLX visuals. So GL_MAX_SAMPLES is really what we care about. If the value returned by Mesa for getIntegerv(GL_MAX_SAMPLES) can't be used to tell whether multisample renderbuffers are actually supported, then how can we determine that? Benoit _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
