draw: fixes for vertex shaders outputting layer or viewport index

[mesa.git] / src / gallium / auxiliary / draw / draw_vs.c

diff --git a/src/gallium/auxiliary/draw/draw_vs.c b/src/gallium/auxiliary/draw/draw_vs.c
index dc50870b267f645979da70e1f50147a2bc40d0c0..f24354e9d5164f906f09bc80ba92fe90e5413df0 100644 (file)
--- a/src/gallium/auxiliary/draw/draw_vs.c
+++ b/src/gallium/auxiliary/draw/draw_vs.c
@@ -85,7 +85,9 @@ draw_create_vertex_shader(struct draw_context *draw,
                   vs->info.output_semantic_index[i] == 0) {
             found_clipvertex = TRUE;
             vs->clipvertex_output = i;
-         } else if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_CLIPDIST) {
+         } else if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_VIEWPORT_INDEX)
+            vs->viewport_index_output = i;
+         else if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_CLIPDIST) {
             debug_assert(vs->info.output_semantic_index[i] <
                          PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT);
             vs->clipdistance_output[vs->info.output_semantic_index[i]] = i;