draw/gs: preserve leading vertex info for gs

We need to handle the leading vertex information when
assembling primitives for the geometry shader otherwise
the resulting triangles will have vertices at incorrect
input locations.

Signed-off-by: Zack Rusin <zackr@vmware.com>
Reviewed-by: José Fonseca <jfonseca@vmware.com>

diff --git a/src/gallium/auxiliary/draw/draw_gs_tmp.h b/src/gallium/auxiliary/draw/draw_gs_tmp.h
index 92b6fb7..b10bbc4 100644 (file)
--- a/src/gallium/auxiliary/draw/draw_gs_tmp.h
+++ b/src/gallium/auxiliary/draw/draw_gs_tmp.h
@@ -10,7 +10,7 @@
    const unsigned prim_flags = input_prims->flags;                \
    const unsigned count = input_prims->count;                     \
    const boolean quads_flatshade_last = FALSE;                    \
-   const boolean last_vertex_last = TRUE;                         \
+   const boolean last_vertex_last = !gs->draw->rasterizer->flatshade_first;  \
    do {                                                           \
       debug_assert(input_prims->primitive_count == 1);            \
       switch (prim) {                                             \