diff options
Diffstat (limited to 'src/gallium/auxiliary/draw/draw_pipe_vbuf.c')
| -rw-r--r-- | src/gallium/auxiliary/draw/draw_pipe_vbuf.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/src/gallium/auxiliary/draw/draw_pipe_vbuf.c b/src/gallium/auxiliary/draw/draw_pipe_vbuf.c index a5d840b96ea..1a5269c0de9 100644 --- a/src/gallium/auxiliary/draw/draw_pipe_vbuf.c +++ b/src/gallium/auxiliary/draw/draw_pipe_vbuf.c @@ -159,8 +159,19 @@ vbuf_tri( struct draw_stage *stage, check_space( vbuf, 3 ); - for (i = 0; i < 3; i++) { - vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[i] ); + if (vbuf->stage.draw->rasterizer->flatshade_first) { + /* Put provoking vertex in position expected by the driver. + * Emit last provoking vertex in first pos. + * Swap verts 0 & 1 to preserve polygon winding. + */ + vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[2] ); + vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[0] ); + vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[1] ); + } + else { + for (i = 0; i < 3; i++) { + vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[i] ); + } } } |