X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fgallium%2Fauxiliary%2Fdraw%2Fdraw_pt_decompose.h;h=3c44f7c11eec0c216fa9c1217ea87dd95f0cbe89;hb=2b8db4ce156fbd4d094f46fad0b8b3291b057fff;hp=3fb0695687892abd977a43e800c7d800683a953e;hpb=dace236c5fffa29d59e4d12fa865889bbecbdd24;p=mesa.git

diff --git a/src/gallium/auxiliary/draw/draw_pt_decompose.h b/src/gallium/auxiliary/draw/draw_pt_decompose.h
index 3fb06956878..3c44f7c11ee 100644
--- a/src/gallium/auxiliary/draw/draw_pt_decompose.h
+++ b/src/gallium/auxiliary/draw/draw_pt_decompose.h
@@ -47,10 +47,19 @@ static void FUNC( ARGS,
 
    case PIPE_PRIM_TRIANGLES:
       for (i = 0; i+2 < count; i += 3) {
-         TRIANGLE( DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL,
-                   (i + 0),
-                   (i + 1),
-                   (i + 2 ));
+         if (flatfirst) {
+            /* put provoking vertex in last pos for clipper */
+            TRIANGLE( DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL,
+                      (i + 1),
+                      (i + 2),
+                      (i + 0 ));
+         }
+         else {
+            TRIANGLE( DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL,
+                      (i + 0),
+                      (i + 1),
+                      (i + 2 ));
+         }
       }
       break;
 
@@ -58,9 +67,9 @@ static void FUNC( ARGS,
       if (flatfirst) {
          for (i = 0; i+2 < count; i++) {
             TRIANGLE( DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL,
-                      (i + 0),
                       (i + 1 + (i&1)),
-                      (i + 2 - (i&1)));
+                      (i + 2 - (i&1)),
+                      (i + 0) );
          }
       }
       else {
@@ -78,9 +87,9 @@ static void FUNC( ARGS,
          if (flatfirst) {
             for (i = 0; i+2 < count; i++) {
                TRIANGLE( DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL,
-                         (i + 1),
                          (i + 2),
-                         (0 ));
+                         0,
+                         (i + 1) );
             }
          }
          else {