cso_set_stream_outputs(cso, 0, NULL, NULL);
cso_set_sample_mask(cso, ~0);
cso_set_min_samples(cso, 1);
+ st->clear.raster.multisample = st->state.fb_num_samples > 1;
cso_set_rasterizer(cso, &st->clear.raster);
/* viewport state: viewport matching window dims */