From 6ff60049a4ab1abac46e5c8e317b0dd842e088c2 Mon Sep 17 00:00:00 2001
From: Keith Whitwell <keith@tungstengraphics.com>
Date: Wed, 3 Dec 2003 10:15:17 +0000
Subject: Ensure PRIM_BEGIN marker isn't lost when incomplete primitives are
 wrapped.

---
 src/mesa/tnl/t_save_api.c      | 22 +++++++++++++++++-----
 src/mesa/tnl/t_save_playback.c |  2 --
 src/mesa/tnl/t_vtx_api.c       | 17 ++++++++++-------
 3 files changed, 27 insertions(+), 14 deletions(-)

(limited to 'src')

diff --git a/src/mesa/tnl/t_save_api.c b/src/mesa/tnl/t_save_api.c
index 1fe2ff6d44..92fd336953 100644
--- a/src/mesa/tnl/t_save_api.c
+++ b/src/mesa/tnl/t_save_api.c
@@ -306,6 +306,7 @@ static void _save_wrap_buffers( GLcontext *ctx )
    TNLcontext *tnl = TNL_CONTEXT(ctx);
    GLint i = tnl->save.prim_count - 1;
    GLenum mode;
+   GLuint count;
 
    assert(i < (GLint) tnl->save.prim_max);
    assert(i >= 0);
@@ -314,7 +315,9 @@ static void _save_wrap_buffers( GLcontext *ctx )
     */
    tnl->save.prim[i].count = ((tnl->save.initial_counter - tnl->save.counter) - 
 			     tnl->save.prim[i].start);
-   mode = tnl->save.prim[i].mode & ~(PRIM_BEGIN|PRIM_END);
+   count = tnl->save.prim[i].count;
+   mode = tnl->save.prim[i].mode;
+
    
    /* store the copied vertices, and allocate a new list.
     */
@@ -322,10 +325,19 @@ static void _save_wrap_buffers( GLcontext *ctx )
 
    /* Restart interrupted primitive
     */
-   tnl->save.prim[0].mode = mode;
-   tnl->save.prim[0].start = 0;
-   tnl->save.prim[0].count = 0;
-   tnl->save.prim_count = 1;
+   if (!(mode & PRIM_END)) {
+
+      if (count == tnl->save.copied.nr) 
+	 tnl->save.prim[0].mode = mode;
+      else
+	 tnl->save.prim[0].mode = mode & ~PRIM_BEGIN;
+
+      tnl->save.prim[0].start = 0;
+      tnl->save.prim[0].count = 0;
+      tnl->save.prim_count = 1;
+   }
+   else
+      tnl->save.prim_count = 0;
 }
 
 
diff --git a/src/mesa/tnl/t_save_playback.c b/src/mesa/tnl/t_save_playback.c
index 27fe2fe162..5a44401444 100644
--- a/src/mesa/tnl/t_save_playback.c
+++ b/src/mesa/tnl/t_save_playback.c
@@ -187,8 +187,6 @@ void _tnl_playback_vertex_list( GLcontext *ctx, void *data )
 	 /* Degenerate case: list references current data and would
 	  * require fixup.  Take the easier option & loop it back.
 	  */
-	 _mesa_debug(ctx,
-                     "tnl_playback_vertex_list: loopback dangling attr ref\n");
 	 _tnl_loopback_vertex_list( ctx, (struct tnl_vertex_list *) data );
 	 return;
       }
diff --git a/src/mesa/tnl/t_vtx_api.c b/src/mesa/tnl/t_vtx_api.c
index 73849a4dc5..34a77ec40a 100644
--- a/src/mesa/tnl/t_vtx_api.c
+++ b/src/mesa/tnl/t_vtx_api.c
@@ -51,6 +51,8 @@ static void init_attrfv( TNLcontext *tnl );
 static void _tnl_wrap_buffers( GLcontext *ctx )
 {
    TNLcontext *tnl = TNL_CONTEXT(ctx);
+   GLuint last_prim = tnl->vtx.prim[tnl->vtx.prim_count-1].mode;
+   GLuint last_count = tnl->vtx.prim[tnl->vtx.prim_count-1].count;
 
    if (ctx->Driver.CurrentExecPrimitive != GL_POLYGON+1) {
       GLint i = tnl->vtx.prim_count - 1;
@@ -72,6 +74,9 @@ static void _tnl_wrap_buffers( GLcontext *ctx )
       tnl->vtx.prim[0].start = 0;
       tnl->vtx.prim[0].count = 0;
       tnl->vtx.prim_count++;
+      
+      if (tnl->vtx.copied.nr == last_count)
+	 tnl->vtx.prim[0].mode |= last_prim & PRIM_BEGIN;
    }
 }
 
@@ -1008,18 +1013,16 @@ static void _tnl_End( void )
 
       ctx->Driver.CurrentExecPrimitive = GL_POLYGON+1;
 
+      /* Two choices which effect the way vertex attributes are
+       * carried over (or not) between adjacent primitives.
+       */
 #if 0
-      if (tnl->vtx.counter * 2 > tnl->vtx.initial_counter)
-	 _tnl_FlushVertices( ctx, ~0 );
-#endif
-
-      if (tnl->vtx.prim_count == TNL_MAX_PRIM) {
-#if 0
+      if (tnl->vtx.prim_count == TNL_MAX_PRIM) 
 	 _tnl_FlushVertices( ctx, ~0 );
 #else
+      if (tnl->vtx.prim_count == TNL_MAX_PRIM)
 	 _tnl_flush_vtx( ctx );	
 #endif
-      }
 
    }
    else 
-- 
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