zink: expose demote when supported

This enables GL_EXT_demote_to_helper_invocation on Zink.

Reviewed-by: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18272>

diff --git a/src/gallium/drivers/zink/zink_screen.c b/src/gallium/drivers/zink/zink_screen.c
index 3da79e2..20d081d 100644 (file)
--- a/src/gallium/drivers/zink/zink_screen.c
+++ b/src/gallium/drivers/zink/zink_screen.c
@@ -577,6 +577,10 @@ zink_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
       if (screen->info.have_EXT_shader_subgroup_ballot)
          return true;
       return false;
+
+   case PIPE_CAP_DEMOTE_TO_HELPER_INVOCATION:
+      return screen->info.have_EXT_shader_demote_to_helper_invocation;
+
    case PIPE_CAP_SAMPLE_SHADING:
       return screen->info.feats.features.sampleRateShading;