Mesa (master): draw: revert using correct order for prim decomposition.

[Roland Scheidegger]

Module: Mesa
Branch: master
Commit: f97b731c82afb06cfd6ffebc90a3e098a9a1b308
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=f97b731c82afb06cfd6ffebc90a3e098a9a1b308

Author: Roland Scheidegger <sroland at vmware.com>
Date:   Wed Dec 17 20:16:07 2014 +0100

draw: revert using correct order for prim decomposition.

This reverts db3dfcfe90a3d27e6020e0d3642f8ab0330e57be.
The commit was correct but we've got some precision problems later in
llvmpipe (or possibly in draw clip) due to the vertices coming in in
different order, causing some internal test failures. So revert for now.
(Will only affect drivers which actually support constant-interpolated
attributes and not just flatshading.)

---

 src/gallium/auxiliary/draw/draw_pt_decompose.h |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/gallium/auxiliary/draw/draw_pt_decompose.h b/src/gallium/auxiliary/draw/draw_pt_decompose.h
index 0b2522c..c4fab65 100644
--- a/src/gallium/auxiliary/draw/draw_pt_decompose.h
+++ b/src/gallium/auxiliary/draw/draw_pt_decompose.h
@@ -3,6 +3,8 @@
    const boolean quads_flatshade_last =      \
       draw->quads_always_flatshade_last;     \
    const boolean last_vertex_last =          \
-      !draw->rasterizer->flatshade_first;
+      !(draw->rasterizer->flatshade &&       \
+        draw->rasterizer->flatshade_first);
+/* FIXME: the draw->rasterizer->flatshade part is really wrong */
 
 #include "draw_decompose_tmp.h"