diff options
| -rw-r--r-- | src/gallium/auxiliary/draw/draw_pipe_ia.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/draw/draw_pipe_ia.c b/src/gallium/auxiliary/draw/draw_pipe_ia.c index ecbb23397dc..d64f19b38cb 100644 --- a/src/gallium/auxiliary/draw/draw_pipe_ia.c +++ b/src/gallium/auxiliary/draw/draw_pipe_ia.c @@ -68,6 +68,15 @@ inject_primid(struct draw_stage *stage, for (i = 0; i < num_verts; ++i) { struct vertex_header *v = header->v[i]; + /* We have to reset the vertex_id because it's used by + * vbuf to figure out if the vertex had already been + * emitted. For line/tri strips the first vertex of + * subsequent primitives would already be emitted, + * but since we're changing the primitive id on the vertex + * we want to make sure it's reemitted with the correct + * data. + */ + v->vertex_id = UNDEFINED_VERTEX_ID; memcpy(&v->data[slot][0], &primid, sizeof(primid)); memcpy(&v->data[slot][1], &primid, sizeof(primid)); memcpy(&v->data[slot][2], &primid, sizeof(primid)); |