draw: Add flags to draw_prim_info.

A primitive may be splitted in frontends.  The splitted primitives
should convey certain flag bits so that the decomposer can correctly
decide the stipple or edge flags.

This commit adds flags to draw_prim_info and updates the decomposer to
honor the flags.  Frontends and middle ends will be updated later.

1 files changed, 16 insertions, 10 deletions

diff --git a/src/gallium/auxiliary/draw/draw_decompose_tmp.h b/src/gallium/auxiliary/draw/draw_decompose_tmp.h
index a52d2b5058..be3a997c3d 100644
--- a/src/gallium/auxiliary/draw/draw_decompose_tmp.h
+++ b/src/gallium/auxiliary/draw/draw_decompose_tmp.h
@@ -54,10 +54,10 @@ FUNC(FUNC_VARS)
 
    FUNC_ENTER;
 
-   /* prim, count, and last_vertex_last should have been defined */
+   /* prim, prim_flags, count, and last_vertex_last should have been defined */
    if (0) {
-      debug_printf("%s: prim 0x%x, count %d, last_vertex_last %d\n",
-            __FUNCTION__, prim, count, last_vertex_last);
+      debug_printf("%s: prim 0x%x, prim_flags 0x%x, count %d, last_vertex_last %d\n",
+            __FUNCTION__, prim, prim_flags, count, last_vertex_last);
    }
 
    switch (prim) {
@@ -80,7 +80,7 @@ FUNC(FUNC_VARS)
    case PIPE_PRIM_LINE_LOOP:
    case PIPE_PRIM_LINE_STRIP:
       if (count >= 2) {
-         flags = DRAW_PIPE_RESET_STIPPLE;
+         flags = (prim_flags & DRAW_SPLIT_BEFORE) ? 0 : DRAW_PIPE_RESET_STIPPLE;
          idx[1] = GET_ELT(0);
          idx[2] = idx[1];
 
@@ -90,7 +90,7 @@ FUNC(FUNC_VARS)
             LINE(flags, idx[0], idx[1]);
          }
          /* close the loop */
-         if (prim == PIPE_PRIM_LINE_LOOP)
+         if (prim == PIPE_PRIM_LINE_LOOP && !prim_flags)
             LINE(flags, idx[1], idx[2]);
       }
       break;
@@ -255,17 +255,23 @@ FUNC(FUNC_VARS)
 
          if (last_vertex_last) {
             flags = (DRAW_PIPE_RESET_STIPPLE |
-                     DRAW_PIPE_EDGE_FLAG_2 |
                      DRAW_PIPE_EDGE_FLAG_0);
+            if (!(prim_flags & DRAW_SPLIT_BEFORE))
+               flags |= DRAW_PIPE_EDGE_FLAG_1;
+
             edge_next = DRAW_PIPE_EDGE_FLAG_0;
-            edge_finish = DRAW_PIPE_EDGE_FLAG_1;
+            edge_finish =
+               (prim_flags & DRAW_SPLIT_AFTER) ? 0 : DRAW_PIPE_EDGE_FLAG_1;
          }
          else {
             flags = (DRAW_PIPE_RESET_STIPPLE |
-                     DRAW_PIPE_EDGE_FLAG_0 |
                      DRAW_PIPE_EDGE_FLAG_1);
+            if (!(prim_flags & DRAW_SPLIT_BEFORE))
+               flags |= DRAW_PIPE_EDGE_FLAG_0;
+
             edge_next = DRAW_PIPE_EDGE_FLAG_1;
-            edge_finish = DRAW_PIPE_EDGE_FLAG_2;
+            edge_finish =
+               (prim_flags & DRAW_SPLIT_AFTER) ? 0 : DRAW_PIPE_EDGE_FLAG_2;
          }
 
          idx[0] = GET_ELT(0);
@@ -300,7 +306,7 @@ FUNC(FUNC_VARS)
 
    case PIPE_PRIM_LINE_STRIP_ADJACENCY:
       if (count >= 4) {
-         flags = DRAW_PIPE_RESET_STIPPLE;
+         flags = (prim_flags & DRAW_SPLIT_BEFORE) ? 0 : DRAW_PIPE_RESET_STIPPLE;
          idx[1] = GET_ELT(0);
          idx[2] = GET_ELT(1);
          idx[3] = GET_ELT(2);