st/mesa: only enable ARB_enhanced_layouts if there are xfb buffers

It really doesn't make sense without any xfb support. One could limp
along, but our validation does not work as-is. Doesn't seem important to
support this use-case.

This disables GL_ARB_enhanced_layouts on crocus with gen4/5.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14869>

diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index b9dee08..f9dd228 100644 (file)
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -1199,7 +1199,8 @@ void st_init_extensions(struct pipe_screen *screen,
       extensions->EXT_gpu_shader4 = GL_TRUE;
       extensions->EXT_texture_buffer_object = GL_TRUE;
 
-      if (screen->get_param(screen, PIPE_CAP_TGSI_ARRAY_COMPONENTS))
+      if (consts->MaxTransformFeedbackBuffers &&
+          screen->get_param(screen, PIPE_CAP_TGSI_ARRAY_COMPONENTS))
          extensions->ARB_enhanced_layouts = GL_TRUE;
    }