Yeah, the sample positions in the fragment shader are always set correctly even if there is no multisample buffer. It's implemented in the patch which adds support for SAMPLEPOS.
Marek On Wed, May 7, 2014 at 4:12 PM, Ilia Mirkin <[email protected]> wrote: > On Wed, May 7, 2014 at 10:00 AM, Marek Olšák <[email protected]> wrote: >> +static void si_set_min_samples(struct pipe_context *ctx, unsigned >> min_samples) >> +{ >> + struct si_context *sctx = (struct si_context *)ctx; >> + >> + if (sctx->ps_iter_samples == min_samples) >> + return; >> + >> + sctx->ps_iter_samples = min_samples; >> + >> + if (sctx->framebuffer.nr_samples > 1) >> + sctx->msaa_config.dirty = true; >> } > > I don't know your HW, but keep in mind that there's nothing preventing > one from using gl_SamplePosition/etc without a MS framebuffer. With > the piglit tests, that's passing '1' or '0' as the arguments for the > number of samples. > > -ilia _______________________________________________ mesa-dev mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-dev
