X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;ds=sidebyside;f=src%2Fgallium%2Fdrivers%2Fsoftpipe%2Fsp_prim_vbuf.c;h=7f573aef3c361dd781c7c33877a3e9f89825791b;hb=5184b02b0793136a15b7edf309d79a1efe1bc73d;hp=425e13cd28383fada11b785db5bcc196c3eea7a2;hpb=81c862205e32b163a9f5ecf3f59e4cdcccee36c6;p=mesa.git

diff --git a/src/gallium/drivers/softpipe/sp_prim_vbuf.c b/src/gallium/drivers/softpipe/sp_prim_vbuf.c
index 425e13cd283..7f573aef3c3 100644
--- a/src/gallium/drivers/softpipe/sp_prim_vbuf.c
+++ b/src/gallium/drivers/softpipe/sp_prim_vbuf.c
@@ -26,10 +26,10 @@
  **************************************************************************/
 
 /**
- * Post-transform vertex buffering.  This is an optional part of the
- * softpipe rendering pipeline.
- * Probably not desired in general, but useful for testing/debuggin.
- * Enabled/Disabled with SP_VBUF env var.
+ * Interface between 'draw' module's output and the softpipe rasterizer/setup
+ * code.  When the 'draw' module has finished filling a vertex buffer, the
+ * draw_arrays() functions below will be called.  Loop over the vertices and
+ * call the point/line/tri setup functions.
  *
  * Authors
  *  Brian Paul
@@ -37,13 +37,13 @@
 
 
 #include "sp_context.h"
+#include "sp_setup.h"
 #include "sp_state.h"
 #include "sp_prim_vbuf.h"
-#include "sp_prim_setup.h"
-#include "sp_setup.h"
 #include "draw/draw_context.h"
 #include "draw/draw_vbuf.h"
 #include "util/u_memory.h"
+#include "util/u_prim.h"
 
 
 #define SP_MAX_VBUF_INDEXES 1024
@@ -58,8 +58,12 @@ struct softpipe_vbuf_render
 {
    struct vbuf_render base;
    struct softpipe_context *softpipe;
+   struct setup_context *setup;
+
    uint prim;
    uint vertex_size;
+   uint nr_vertices;
+   uint vertex_buffer_size;
    void *vertex_buffer;
 };
 
@@ -72,6 +76,11 @@ softpipe_vbuf_render(struct vbuf_render *vbr)
 }
 
 
+
+
+
+
+
 static const struct vertex_info *
 sp_vbuf_get_vertex_info(struct vbuf_render *vbr)
 {
@@ -80,26 +89,47 @@ sp_vbuf_get_vertex_info(struct vbuf_render *vbr)
 }
 
 
-static void *
+static boolean
 sp_vbuf_allocate_vertices(struct vbuf_render *vbr,
-                            ushort vertex_size, ushort nr_vertices)
+                          ushort vertex_size, ushort nr_vertices)
 {
    struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
-   assert(!cvbr->vertex_buffer);
-   cvbr->vertex_buffer = align_malloc(vertex_size * nr_vertices, 16);
+   unsigned size = vertex_size * nr_vertices;
+
+   if (cvbr->vertex_buffer_size < size) {
+      align_free(cvbr->vertex_buffer);
+      cvbr->vertex_buffer = align_malloc(size, 16);
+      cvbr->vertex_buffer_size = size;
+   }
+
    cvbr->vertex_size = vertex_size;
-   return cvbr->vertex_buffer;
+   cvbr->nr_vertices = nr_vertices;
+   
+   return cvbr->vertex_buffer != NULL;
 }
 
-
 static void
-sp_vbuf_release_vertices(struct vbuf_render *vbr, void *vertices,
-                           unsigned vertex_size, unsigned vertices_used)
+sp_vbuf_release_vertices(struct vbuf_render *vbr)
+{
+   /* keep the old allocation for next time */
+}
+
+static void *
+sp_vbuf_map_vertices(struct vbuf_render *vbr)
 {
    struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
-   align_free(vertices);
-   assert(vertices == cvbr->vertex_buffer);
-   cvbr->vertex_buffer = NULL;
+   return cvbr->vertex_buffer;
+}
+
+static void 
+sp_vbuf_unmap_vertices(struct vbuf_render *vbr, 
+                       ushort min_index,
+                       ushort max_index )
+{
+   struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
+   assert( cvbr->vertex_buffer_size >= (max_index+1) * cvbr->vertex_size );
+   (void) cvbr;
+   /* do nothing */
 }
 
 
@@ -107,16 +137,11 @@ static boolean
 sp_vbuf_set_primitive(struct vbuf_render *vbr, unsigned prim)
 {
    struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
-
-   /* XXX: break this dependency - make setup_context live under
-    * softpipe, rename the old "setup" draw stage to something else.
-    */
-   struct setup_context *setup_ctx = sp_draw_setup_context(cvbr->softpipe->setup);
+   struct setup_context *setup_ctx = cvbr->setup;
    
-   setup_prepare( setup_ctx );
-
-
+   sp_setup_prepare( setup_ctx );
 
+   cvbr->softpipe->reduced_prim = u_reduced_prim(prim);
    cvbr->prim = prim;
    return TRUE;
 
@@ -131,33 +156,30 @@ static INLINE cptrf4 get_vert( const void *vertex_buffer,
 }
 
 
+/**
+ * draw elements / indexed primitives
+ */
 static void
 sp_vbuf_draw(struct vbuf_render *vbr, const ushort *indices, uint nr)
 {
    struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
    struct softpipe_context *softpipe = cvbr->softpipe;
-   unsigned stride = softpipe->vertex_info_vbuf.size * sizeof(float);
-   unsigned i;
+   const unsigned stride = softpipe->vertex_info_vbuf.size * sizeof(float);
    const void *vertex_buffer = cvbr->vertex_buffer;
-
-   /* XXX: break this dependency - make setup_context live under
-    * softpipe, rename the old "setup" draw stage to something else.
-    */
-   struct draw_stage *setup = softpipe->setup;
-   struct setup_context *setup_ctx = sp_draw_setup_context(softpipe->setup);
-
+   struct setup_context *setup_ctx = cvbr->setup;
+   unsigned i;
 
    switch (cvbr->prim) {
    case PIPE_PRIM_POINTS:
       for (i = 0; i < nr; i++) {
-         setup_point( setup_ctx,
+         sp_setup_point( setup_ctx,
                       get_vert(vertex_buffer, indices[i-0], stride) );
       }
       break;
 
    case PIPE_PRIM_LINES:
       for (i = 1; i < nr; i += 2) {
-         setup_line( setup_ctx,
+         sp_setup_line( setup_ctx,
                      get_vert(vertex_buffer, indices[i-1], stride),
                      get_vert(vertex_buffer, indices[i-0], stride) );
       }
@@ -165,7 +187,7 @@ sp_vbuf_draw(struct vbuf_render *vbr, const ushort *indices, uint nr)
 
    case PIPE_PRIM_LINE_STRIP:
       for (i = 1; i < nr; i ++) {
-         setup_line( setup_ctx,
+         sp_setup_line( setup_ctx,
                      get_vert(vertex_buffer, indices[i-1], stride),
                      get_vert(vertex_buffer, indices[i-0], stride) );
       }
@@ -173,79 +195,146 @@ sp_vbuf_draw(struct vbuf_render *vbr, const ushort *indices, uint nr)
 
    case PIPE_PRIM_LINE_LOOP:
       for (i = 1; i < nr; i ++) {
-         setup_line( setup_ctx,
+         sp_setup_line( setup_ctx,
                      get_vert(vertex_buffer, indices[i-1], stride),
                      get_vert(vertex_buffer, indices[i-0], stride) );
       }
       if (nr) {
-         setup_line( setup_ctx,
+         sp_setup_line( setup_ctx,
                      get_vert(vertex_buffer, indices[nr-1], stride),
                      get_vert(vertex_buffer, indices[0], stride) );
       }
       break;
 
-
    case PIPE_PRIM_TRIANGLES:
-      for (i = 2; i < nr; i += 3) {
-         setup_tri( setup_ctx,
-                    get_vert(vertex_buffer, indices[i-2], stride),
-                    get_vert(vertex_buffer, indices[i-1], stride),
-                    get_vert(vertex_buffer, indices[i-0], stride));
+      if (softpipe->rasterizer->flatshade_first) {
+         for (i = 2; i < nr; i += 3) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, indices[i-1], stride),
+                       get_vert(vertex_buffer, indices[i-0], stride),
+                       get_vert(vertex_buffer, indices[i-2], stride) );
+         }
+      }
+      else {
+         for (i = 2; i < nr; i += 3) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, indices[i-2], stride),
+                       get_vert(vertex_buffer, indices[i-1], stride),
+                       get_vert(vertex_buffer, indices[i-0], stride) );
+         }
       }
       break;
 
    case PIPE_PRIM_TRIANGLE_STRIP:
-      for (i = 2; i < nr; i += 1) {
-         setup_tri( setup_ctx,
-                    get_vert(vertex_buffer, indices[i+(i&1)-2], stride),
-                    get_vert(vertex_buffer, indices[i-(i&1)-1], stride),
-                    get_vert(vertex_buffer, indices[i-0], stride));
+      if (softpipe->rasterizer->flatshade_first) {
+         for (i = 2; i < nr; i += 1) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, indices[i+(i&1)-1], stride),
+                       get_vert(vertex_buffer, indices[i-(i&1)], stride),
+                       get_vert(vertex_buffer, indices[i-2], stride) );
+         }
+      }
+      else {
+         for (i = 2; i < nr; i += 1) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, indices[i+(i&1)-2], stride),
+                       get_vert(vertex_buffer, indices[i-(i&1)-1], stride),
+                       get_vert(vertex_buffer, indices[i-0], stride) );
+         }
       }
       break;
 
    case PIPE_PRIM_TRIANGLE_FAN:
-   case PIPE_PRIM_POLYGON:
-      for (i = 2; i < nr; i += 1) {
-         setup_tri( setup_ctx,
-                    get_vert(vertex_buffer, indices[0], stride),
-                    get_vert(vertex_buffer, indices[i-1], stride),
-                    get_vert(vertex_buffer, indices[i-0], stride));
+      if (softpipe->rasterizer->flatshade_first) {
+         for (i = 2; i < nr; i += 1) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, indices[i-0], stride),
+                       get_vert(vertex_buffer, indices[0], stride),
+                       get_vert(vertex_buffer, indices[i-1], stride) );
+         }
+      }
+      else {
+         for (i = 2; i < nr; i += 1) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, indices[0], stride),
+                       get_vert(vertex_buffer, indices[i-1], stride),
+                       get_vert(vertex_buffer, indices[i-0], stride) );
+         }
       }
       break;
+
    case PIPE_PRIM_QUADS:
-      for (i = 3; i < nr; i += 4) {
-         setup_tri( setup_ctx,
-                    get_vert(vertex_buffer, indices[i-3], stride),
-                    get_vert(vertex_buffer, indices[i-2], stride),
-                    get_vert(vertex_buffer, indices[i-0], stride));
-
-         setup_tri( setup_ctx,
-                    get_vert(vertex_buffer, indices[i-2], stride),
-                    get_vert(vertex_buffer, indices[i-1], stride),
-                    get_vert(vertex_buffer, indices[i-0], stride));
+      if (softpipe->rasterizer->flatshade_first) {
+         for (i = 3; i < nr; i += 4) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, indices[i-2], stride),
+                       get_vert(vertex_buffer, indices[i-1], stride),
+                       get_vert(vertex_buffer, indices[i-3], stride) );
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, indices[i-1], stride),
+                       get_vert(vertex_buffer, indices[i-0], stride),
+                       get_vert(vertex_buffer, indices[i-3], stride) );
+         }
+      }
+      else {
+         for (i = 3; i < nr; i += 4) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, indices[i-3], stride),
+                       get_vert(vertex_buffer, indices[i-2], stride),
+                       get_vert(vertex_buffer, indices[i-0], stride) );
+
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, indices[i-2], stride),
+                       get_vert(vertex_buffer, indices[i-1], stride),
+                       get_vert(vertex_buffer, indices[i-0], stride) );
+         }
       }
       break;
+
    case PIPE_PRIM_QUAD_STRIP:
-      for (i = 3; i < nr; i += 2) {
-         setup_tri( setup_ctx,
-                    get_vert(vertex_buffer, indices[i-3], stride),
-                    get_vert(vertex_buffer, indices[i-2], stride),
-                    get_vert(vertex_buffer, indices[i-0], stride));
+      if (softpipe->rasterizer->flatshade_first) {
+         for (i = 3; i < nr; i += 2) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, indices[i-0], stride),
+                       get_vert(vertex_buffer, indices[i-1], stride),
+                       get_vert(vertex_buffer, indices[i-3], stride));
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, indices[i-2], stride),
+                       get_vert(vertex_buffer, indices[i-0], stride),
+                       get_vert(vertex_buffer, indices[i-3], stride) );
+         }
+      }
+      else {
+         for (i = 3; i < nr; i += 2) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, indices[i-3], stride),
+                       get_vert(vertex_buffer, indices[i-2], stride),
+                       get_vert(vertex_buffer, indices[i-0], stride) );
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, indices[i-1], stride),
+                       get_vert(vertex_buffer, indices[i-3], stride),
+                       get_vert(vertex_buffer, indices[i-0], stride) );
+         }
+      }
+      break;
 
-         setup_tri( setup_ctx,
+   case PIPE_PRIM_POLYGON:
+      /* Almost same as tri fan but the _first_ vertex specifies the flat
+       * shading color.  Note that the first polygon vertex is passed as
+       * the last triangle vertex here.
+       * flatshade_first state makes no difference.
+       */
+      for (i = 2; i < nr; i += 1) {
+         sp_setup_tri( setup_ctx,
+                    get_vert(vertex_buffer, indices[i-0], stride),
                     get_vert(vertex_buffer, indices[i-1], stride),
-                    get_vert(vertex_buffer, indices[i-3], stride),
-                    get_vert(vertex_buffer, indices[i-0], stride));
+                    get_vert(vertex_buffer, indices[0], stride) );
       }
       break;
+
    default:
       assert(0);
    }
-
-   /* XXX: why are we calling this???  If we had to call something, it
-    * would be a function in sp_setup.c:
-    */
-   sp_draw_flush( setup );
 }
 
 
@@ -258,25 +347,23 @@ sp_vbuf_draw_arrays(struct vbuf_render *vbr, uint start, uint nr)
 {
    struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
    struct softpipe_context *softpipe = cvbr->softpipe;
-   struct draw_stage *setup = softpipe->setup;
-   const void *vertex_buffer = NULL;
+   struct setup_context *setup_ctx = cvbr->setup;
    const unsigned stride = softpipe->vertex_info_vbuf.size * sizeof(float);
+   const void *vertex_buffer =
+      (void *) get_vert(cvbr->vertex_buffer, start, stride);
    unsigned i;
-   struct setup_context *setup_ctx = sp_draw_setup_context(setup);
-
-   vertex_buffer = (void *)get_vert(cvbr->vertex_buffer, start, stride);
 
    switch (cvbr->prim) {
    case PIPE_PRIM_POINTS:
       for (i = 0; i < nr; i++) {
-         setup_point( setup_ctx,
+         sp_setup_point( setup_ctx,
                       get_vert(vertex_buffer, i-0, stride) );
       }
       break;
 
    case PIPE_PRIM_LINES:
       for (i = 1; i < nr; i += 2) {
-         setup_line( setup_ctx,
+         sp_setup_line( setup_ctx,
                      get_vert(vertex_buffer, i-1, stride),
                      get_vert(vertex_buffer, i-0, stride) );
       }
@@ -284,7 +371,7 @@ sp_vbuf_draw_arrays(struct vbuf_render *vbr, uint start, uint nr)
 
    case PIPE_PRIM_LINE_STRIP:
       for (i = 1; i < nr; i ++) {
-         setup_line( setup_ctx,
+         sp_setup_line( setup_ctx,
                      get_vert(vertex_buffer, i-1, stride),
                      get_vert(vertex_buffer, i-0, stride) );
       }
@@ -292,71 +379,142 @@ sp_vbuf_draw_arrays(struct vbuf_render *vbr, uint start, uint nr)
 
    case PIPE_PRIM_LINE_LOOP:
       for (i = 1; i < nr; i ++) {
-         setup_line( setup_ctx,
+         sp_setup_line( setup_ctx,
                      get_vert(vertex_buffer, i-1, stride),
                      get_vert(vertex_buffer, i-0, stride) );
       }
       if (nr) {
-         setup_line( setup_ctx,
+         sp_setup_line( setup_ctx,
                      get_vert(vertex_buffer, nr-1, stride),
                      get_vert(vertex_buffer, 0, stride) );
       }
       break;
 
-
    case PIPE_PRIM_TRIANGLES:
-      for (i = 2; i < nr; i += 3) {
-         setup_tri( setup_ctx,
-                    get_vert(vertex_buffer, i-2, stride),
-                    get_vert(vertex_buffer, i-1, stride),
-                    get_vert(vertex_buffer, i-0, stride));
+      if (softpipe->rasterizer->flatshade_first) {
+         for (i = 2; i < nr; i += 3) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, i-1, stride),
+                       get_vert(vertex_buffer, i-0, stride),
+                       get_vert(vertex_buffer, i-2, stride) );
+         }
+      }
+      else {
+         for (i = 2; i < nr; i += 3) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, i-2, stride),
+                       get_vert(vertex_buffer, i-1, stride),
+                       get_vert(vertex_buffer, i-0, stride) );
+         }
       }
       break;
 
    case PIPE_PRIM_TRIANGLE_STRIP:
-      for (i = 2; i < nr; i += 1) {
-         setup_tri( setup_ctx,
-                    get_vert(vertex_buffer, i+(i&1)-2, stride),
-                    get_vert(vertex_buffer, i-(i&1)-1, stride),
-                    get_vert(vertex_buffer, i-0, stride));
+      if (softpipe->rasterizer->flatshade_first) {
+         for (i = 2; i < nr; i++) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, i+(i&1)-1, stride),
+                       get_vert(vertex_buffer, i-(i&1), stride),
+                       get_vert(vertex_buffer, i-2, stride) );
+         }
+      }
+      else {
+         for (i = 2; i < nr; i++) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, i+(i&1)-2, stride),
+                       get_vert(vertex_buffer, i-(i&1)-1, stride),
+                       get_vert(vertex_buffer, i-0, stride) );
+         }
       }
       break;
 
    case PIPE_PRIM_TRIANGLE_FAN:
-   case PIPE_PRIM_POLYGON:
-      for (i = 2; i < nr; i += 1) {
-         setup_tri( setup_ctx,
-                    get_vert(vertex_buffer, 0, stride),
-                    get_vert(vertex_buffer, i-1, stride),
-                    get_vert(vertex_buffer, i-0, stride));
+      if (softpipe->rasterizer->flatshade_first) {
+         for (i = 2; i < nr; i += 1) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, i-0, stride),
+                       get_vert(vertex_buffer, 0, stride),
+                       get_vert(vertex_buffer, i-1, stride) );
+         }
+      }
+      else {
+         for (i = 2; i < nr; i += 1) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, 0, stride),
+                       get_vert(vertex_buffer, i-1, stride),
+                       get_vert(vertex_buffer, i-0, stride) );
+         }
       }
       break;
+
    case PIPE_PRIM_QUADS:
-      for (i = 3; i < nr; i += 4) {
-         setup_tri( setup_ctx,
-                    get_vert(vertex_buffer, i-3, stride),
-                    get_vert(vertex_buffer, i-2, stride),
-                    get_vert(vertex_buffer, i-0, stride));
-
-         setup_tri( setup_ctx,
-                    get_vert(vertex_buffer, i-2, stride),
-                    get_vert(vertex_buffer, i-1, stride),
-                    get_vert(vertex_buffer, i-0, stride));
+      if (softpipe->rasterizer->flatshade_first) {
+         for (i = 3; i < nr; i += 4) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, i-2, stride),
+                       get_vert(vertex_buffer, i-1, stride),
+                       get_vert(vertex_buffer, i-3, stride) );
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, i-1, stride),
+                       get_vert(vertex_buffer, i-0, stride),
+                       get_vert(vertex_buffer, i-3, stride) );
+         }
+      }
+      else {
+         for (i = 3; i < nr; i += 4) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, i-3, stride),
+                       get_vert(vertex_buffer, i-2, stride),
+                       get_vert(vertex_buffer, i-0, stride) );
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, i-2, stride),
+                       get_vert(vertex_buffer, i-1, stride),
+                       get_vert(vertex_buffer, i-0, stride) );
+         }
       }
       break;
+
    case PIPE_PRIM_QUAD_STRIP:
-      for (i = 3; i < nr; i += 2) {
-         setup_tri( setup_ctx,
-                    get_vert(vertex_buffer, i-3, stride),
-                    get_vert(vertex_buffer, i-2, stride),
-                    get_vert(vertex_buffer, i-0, stride));
+      if (softpipe->rasterizer->flatshade_first) {
+         for (i = 3; i < nr; i += 2) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, i-0, stride),
+                       get_vert(vertex_buffer, i-1, stride),
+                       get_vert(vertex_buffer, i-3, stride) );
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, i-2, stride),
+                       get_vert(vertex_buffer, i-0, stride),
+                       get_vert(vertex_buffer, i-3, stride) );
+         }
+      }
+      else {
+         for (i = 3; i < nr; i += 2) {
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, i-3, stride),
+                       get_vert(vertex_buffer, i-2, stride),
+                       get_vert(vertex_buffer, i-0, stride) );
+            sp_setup_tri( setup_ctx,
+                       get_vert(vertex_buffer, i-1, stride),
+                       get_vert(vertex_buffer, i-3, stride),
+                       get_vert(vertex_buffer, i-0, stride) );
+         }
+      }
+      break;
 
-         setup_tri( setup_ctx,
+   case PIPE_PRIM_POLYGON:
+      /* Almost same as tri fan but the _first_ vertex specifies the flat
+       * shading color.  Note that the first polygon vertex is passed as
+       * the last triangle vertex here.
+       * flatshade_first state makes no difference.
+       */
+      for (i = 2; i < nr; i += 1) {
+         sp_setup_tri( setup_ctx,
                     get_vert(vertex_buffer, i-1, stride),
-                    get_vert(vertex_buffer, i-3, stride),
-                    get_vert(vertex_buffer, i-0, stride));
+                    get_vert(vertex_buffer, i-0, stride),
+                    get_vert(vertex_buffer, 0, stride) );
       }
       break;
+
    default:
       assert(0);
    }
@@ -368,38 +526,38 @@ static void
 sp_vbuf_destroy(struct vbuf_render *vbr)
 {
    struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
-   cvbr->softpipe->vbuf_render = NULL;
+   sp_setup_destroy_context(cvbr->setup);
    FREE(cvbr);
 }
 
 
 /**
- * Initialize the post-transform vertex buffer information for the given
- * context.
+ * Create the post-transform vertex handler for the given context.
  */
-void
-sp_init_vbuf(struct softpipe_context *sp)
+struct vbuf_render *
+sp_create_vbuf_backend(struct softpipe_context *sp)
 {
-   assert(sp->draw);
+   struct softpipe_vbuf_render *cvbr = CALLOC_STRUCT(softpipe_vbuf_render);
 
-   sp->vbuf_render = CALLOC_STRUCT(softpipe_vbuf_render);
+   assert(sp->draw);
 
-   sp->vbuf_render->base.max_indices = SP_MAX_VBUF_INDEXES;
-   sp->vbuf_render->base.max_vertex_buffer_bytes = SP_MAX_VBUF_SIZE;
 
-   sp->vbuf_render->base.get_vertex_info = sp_vbuf_get_vertex_info;
-   sp->vbuf_render->base.allocate_vertices = sp_vbuf_allocate_vertices;
-   sp->vbuf_render->base.set_primitive = sp_vbuf_set_primitive;
-   sp->vbuf_render->base.draw = sp_vbuf_draw;
-   sp->vbuf_render->base.draw_arrays = sp_vbuf_draw_arrays;
-   sp->vbuf_render->base.release_vertices = sp_vbuf_release_vertices;
-   sp->vbuf_render->base.destroy = sp_vbuf_destroy;
+   cvbr->base.max_indices = SP_MAX_VBUF_INDEXES;
+   cvbr->base.max_vertex_buffer_bytes = SP_MAX_VBUF_SIZE;
 
-   sp->vbuf_render->softpipe = sp;
+   cvbr->base.get_vertex_info = sp_vbuf_get_vertex_info;
+   cvbr->base.allocate_vertices = sp_vbuf_allocate_vertices;
+   cvbr->base.map_vertices = sp_vbuf_map_vertices;
+   cvbr->base.unmap_vertices = sp_vbuf_unmap_vertices;
+   cvbr->base.set_primitive = sp_vbuf_set_primitive;
+   cvbr->base.draw = sp_vbuf_draw;
+   cvbr->base.draw_arrays = sp_vbuf_draw_arrays;
+   cvbr->base.release_vertices = sp_vbuf_release_vertices;
+   cvbr->base.destroy = sp_vbuf_destroy;
 
-   sp->vbuf = draw_vbuf_stage(sp->draw, &sp->vbuf_render->base);
+   cvbr->softpipe = sp;
 
-   draw_set_rasterize_stage(sp->draw, sp->vbuf);
+   cvbr->setup = sp_setup_create_context(cvbr->softpipe);
 
-   draw_set_render(sp->draw, &sp->vbuf_render->base);
+   return &cvbr->base;
 }