diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vs.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vs.c b/src/mesa/drivers/dri/i965/brw_vs.c index be1ed001a44..7fc7dcca5a3 100644 --- a/src/mesa/drivers/dri/i965/brw_vs.c +++ b/src/mesa/drivers/dri/i965/brw_vs.c @@ -139,14 +139,17 @@ brw_compute_vue_map(struct brw_vue_map *vue_map, * assign them contiguously. Don't reassign outputs that already have a * slot. * - * Also, don't assign a slot for VERT_RESULT_CLIP_VERTEX, since it is - * unsupported in pre-GEN6, and in GEN6+ the vertex shader converts it into - * clip distances. + * Also, prior to Gen6, don't assign a slot for VERT_RESULT_CLIP_VERTEX, + * since it is unsupported. In Gen6 and above, VERT_RESULT_CLIP_VERTEX may + * be needed for transform feedback; since we don't want to have to + * recompute the VUE map (and everything that depends on it) when transform + * feedback is enabled or disabled, just go ahead and assign a slot for it. */ for (int i = 0; i < VERT_RESULT_MAX; ++i) { + if (intel->gen < 6 && i == VERT_RESULT_CLIP_VERTEX) + continue; if ((outputs_written & BITFIELD64_BIT(i)) && - vue_map->vert_result_to_slot[i] == -1 && - i != VERT_RESULT_CLIP_VERTEX) { + vue_map->vert_result_to_slot[i] == -1) { assign_vue_slot(vue_map, i); } } |