u_vbuf: Mark vbufs incompatible if more were requested than HW supports

More vertex buffers are used than the hardware supports.  In
principle, we only need to make sure that less vertex buffers are
used, and mark some of the latter vertex buffers as incompatible.
For now, mark all vertex buffers as incompatible.

Signed-off-by: Paul Cercueil <[email protected]>
Reviewed-by: Marek Olšák <[email protected]>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/2807>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/util/u_vbuf.c b/src/gallium/auxiliary/util/u_vbuf.c
index e69e9fd20a0..67c82a56ecd 100644
--- a/src/gallium/auxiliary/util/u_vbuf.c
+++ b/src/gallium/auxiliary/util/u_vbuf.c
@@ -788,6 +788,17 @@ u_vbuf_create_vertex_elements(struct u_vbuf *mgr, unsigned count,
       }
    }
 
+   if (used_buffers & ~mgr->allowed_vb_mask) {
+      /* More vertex buffers are used than the hardware supports.  In
+       * principle, we only need to make sure that less vertex buffers are
+       * used, and mark some of the latter vertex buffers as incompatible.
+       * For now, mark all vertex buffers as incompatible.
+       */
+      ve->incompatible_vb_mask_any = used_buffers;
+      ve->compatible_vb_mask_any = 0;
+      ve->incompatible_elem_mask = u_bit_consecutive(0, count);
+   }
+
    ve->used_vb_mask = used_buffers;
    ve->compatible_vb_mask_all = ~ve->incompatible_vb_mask_any & used_buffers;
    ve->incompatible_vb_mask_all = ~ve->compatible_vb_mask_any & used_buffers;