1 files changed, 68 insertions, 22 deletions

diff --git a/src/mesa/tnl/t_vertex.c b/src/mesa/tnl/t_vertex.c
index b661524c87..fe4209ae57 100644
--- a/src/mesa/tnl/t_vertex.c
+++ b/src/mesa/tnl/t_vertex.c
@@ -376,6 +376,22 @@ void _tnl_notify_pipeline_output_change( GLcontext *ctx )
    invalidate_funcs(vtx);
 }
 
+
+static void adjust_input_ptrs( GLcontext *ctx, GLint diff)
+{
+   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
+   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
+   struct tnl_clipspace_attr *a = vtx->attr;
+   const GLuint count = vtx->attr_count;
+   int j;
+
+   diff -= 1;
+   for (j=0; j<count; ++j) {
+           register GLvector4f *vptr = VB->AttribPtr[a->attrib];
+	   (a++)->inputptr += diff*vptr->stride;
+   }
+}
+
 static void update_input_ptrs( GLcontext *ctx, GLuint start )
 {
    struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
@@ -431,13 +447,40 @@ void *_tnl_emit_vertices_to_buffer( GLcontext *ctx,
    struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
 
    update_input_ptrs(ctx, start);
-
    /* Note: dest should not be adjusted for non-zero 'start' values:
     */
    vtx->emit( ctx, end - start, (GLubyte*) dest );	
    return (void *)((GLubyte *)dest + vtx->vertex_size * (end - start));
 }
 
+/* Emit indexed VB vertices start..end to dest.  Note that VB vertex at
+ * postion start will be emitted to dest at position zero.
+ */
+
+void *_tnl_emit_indexed_vertices_to_buffer( GLcontext *ctx,
+					    const GLuint *elts,
+					    GLuint start,
+					    GLuint end,
+					    void *dest )
+{
+   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
+   GLuint oldIndex;
+   GLubyte *cdest = dest;
+
+   update_input_ptrs(ctx, oldIndex = elts[start++]);
+   vtx->emit( ctx, 1, cdest );
+   cdest += vtx->vertex_size;
+
+   for (; start < end; ++start) {
+      adjust_input_ptrs(ctx, elts[start] - oldIndex);
+      oldIndex = elts[start];
+      vtx->emit( ctx, 1, cdest);
+      cdest += vtx->vertex_size;
+   }
+
+   return (void *) cdest;
+}
+
 
 void _tnl_init_vertices( GLcontext *ctx, 
 			GLuint vb_size,
@@ -492,27 +535,30 @@ void _tnl_init_vertices( GLcontext *ctx,
 
 void _tnl_free_vertices( GLcontext *ctx )
 {
-   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
-   struct tnl_clipspace_fastpath *fp, *tmp;
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   if (tnl) {
+      struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
+      struct tnl_clipspace_fastpath *fp, *tmp;
 
-   if (vtx->vertex_buf) {
-      ALIGN_FREE(vtx->vertex_buf);
-      vtx->vertex_buf = NULL;
-   }
-   
-   for (fp = vtx->fastpath ; fp ; fp = tmp) {
-      tmp = fp->next;
-      FREE(fp->attr);
-
-      /* KW: At the moment, fp->func is constrained to be allocated by
-       * _mesa_exec_alloc(), as the hardwired fastpaths in
-       * t_vertex_generic.c are handled specially.  It would be nice
-       * to unify them, but this probably won't change until this
-       * module gets another overhaul.
-       */
-      _mesa_exec_free((void *) fp->func);
-      FREE(fp);
+      if (vtx->vertex_buf) {
+         ALIGN_FREE(vtx->vertex_buf);
+         vtx->vertex_buf = NULL;
+      }
+
+      for (fp = vtx->fastpath ; fp ; fp = tmp) {
+         tmp = fp->next;
+         FREE(fp->attr);
+
+         /* KW: At the moment, fp->func is constrained to be allocated by
+          * _mesa_exec_alloc(), as the hardwired fastpaths in
+          * t_vertex_generic.c are handled specially.  It would be nice
+          * to unify them, but this probably won't change until this
+          * module gets another overhaul.
+          */
+         _mesa_exec_free((void *) fp->func);
+         FREE(fp);
+      }
+
+      vtx->fastpath = NULL;
    }
-   
-   vtx->fastpath = NULL;
 }