Mesa (master): draw: initialize vertex header

[Zack Rusin]

Module: Mesa
Branch: master
Commit: 5cf1921e6d7ba36e6e882094d3280e3cd363df61
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=5cf1921e6d7ba36e6e882094d3280e3cd363df61

Author: Zack Rusin <zackr at vmware.com>
Date:   Wed Jun 23 18:13:25 2010 -0400

draw: initialize vertex header

---

 src/gallium/auxiliary/draw/draw_pipe.c       |    2 +-
 src/gallium/auxiliary/draw/draw_pt_fetch.c   |   44 +++-----------------------
 src/gallium/auxiliary/draw/draw_pt_post_vs.c |   13 ++++++--
 3 files changed, 16 insertions(+), 43 deletions(-)

diff --git a/src/gallium/auxiliary/draw/draw_pipe.c b/src/gallium/auxiliary/draw/draw_pipe.c
index a8b9dc6..8cd75ec 100644
--- a/src/gallium/auxiliary/draw/draw_pipe.c
+++ b/src/gallium/auxiliary/draw/draw_pipe.c
@@ -260,7 +260,7 @@ void draw_pipeline_run( struct draw_context *draw,
                         const struct draw_prim_info *prim_info)
 {
    unsigned i, start;
-   
+
    draw->pipeline.verts = (char *)vert_info->verts;
    draw->pipeline.vertex_stride = vert_info->stride;
    draw->pipeline.vertex_count = vert_info->count;
diff --git a/src/gallium/auxiliary/draw/draw_pt_fetch.c b/src/gallium/auxiliary/draw/draw_pt_fetch.c
index bf799db..ae12ee2 100644
--- a/src/gallium/auxiliary/draw/draw_pt_fetch.c
+++ b/src/gallium/auxiliary/draw/draw_pt_fetch.c
@@ -68,31 +68,12 @@ void draw_pt_fetch_prepare( struct pt_fetch *fetch,
 
    fetch->vertex_size = vertex_size;
 
-   /* Always emit/leave space for a vertex header.
-    *
-    * It's worth considering whether the vertex headers should contain
-    * a pointer to the 'data', rather than having it inline.
-    * Something to look at after we've fully switched over to the pt
-    * paths.
+   /* Leave the clipmask/edgeflags/pad/vertex_id untouched
     */
-   {
-      /* Need to set header->vertex_id = 0xffff somehow.
-       */
-      key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
-      key.element[nr].input_format = PIPE_FORMAT_R32_FLOAT;
-      key.element[nr].input_buffer = draw->pt.nr_vertex_buffers;
-      key.element[nr].input_offset = 0;
-      key.element[nr].instance_divisor = 0;
-      key.element[nr].output_format = PIPE_FORMAT_R32_FLOAT;
-      key.element[nr].output_offset = dst_offset;
-      dst_offset += 1 * sizeof(float);
-      nr++;
-
-
-      /* Just leave the clip[] array untouched.
-       */
-      dst_offset += 4 * sizeof(float);
-   }
+   dst_offset += 1 * sizeof(float);
+   /* Just leave the clip[] array untouched.
+    */
+   dst_offset += 4 * sizeof(float);
 
    if (instance_id_index != ~0) {
       num_extra_inputs++;
@@ -131,26 +112,11 @@ void draw_pt_fetch_prepare( struct pt_fetch *fetch,
    key.nr_elements = nr;
    key.output_stride = vertex_size;
 
-
    if (!fetch->translate ||
        translate_key_compare(&fetch->translate->key, &key) != 0)
    {
       translate_key_sanitize(&key);
       fetch->translate = translate_cache_find(fetch->cache, &key);
-
-      {
-         static struct vertex_header vh = { 0,
-                                            1,
-                                            0,
-                                            UNDEFINED_VERTEX_ID,
-                                            { .0f, .0f, .0f, .0f } };
-
-	 fetch->translate->set_buffer(fetch->translate,
-				      draw->pt.nr_vertex_buffers,
-				      &vh,
-				      0,
-				      ~0);
-      }
    }
 
 }
diff --git a/src/gallium/auxiliary/draw/draw_pt_post_vs.c b/src/gallium/auxiliary/draw/draw_pt_post_vs.c
index 112be50..fb92bd8 100644
--- a/src/gallium/auxiliary/draw/draw_pt_post_vs.c
+++ b/src/gallium/auxiliary/draw/draw_pt_post_vs.c
@@ -38,7 +38,14 @@ struct pt_post_vs {
                    struct draw_vertex_info *info );
 };
 
-
+static INLINE void
+initialize_vertex_header(struct vertex_header *header)
+{
+   header->clipmask = 0;
+   header->edgeflag = 1;
+   header->pad = 0;
+   header->vertex_id = UNDEFINED_VERTEX_ID;
+}
 
 static INLINE float
 dot4(const float *a, const float *b)
@@ -49,8 +56,6 @@ dot4(const float *a, const float *b)
            a[3]*b[3]);
 }
 
-
-
 static INLINE unsigned
 compute_clipmask_gl(const float *clip, /*const*/ float plane[][4], unsigned nr)
 {
@@ -103,6 +108,7 @@ static boolean post_vs_cliptest_viewport_gl( struct pt_post_vs *pvs,
    for (j = 0; j < info->count; j++) {
       float *position = out->data[pos];
 
+      initialize_vertex_header(out);
 #if 0
       debug_printf("%d) io = %p, data = %p = [%f, %f, %f, %f]\n",
                    j, out, position, position[0], position[1], position[2], position[3]);
@@ -192,6 +198,7 @@ static boolean post_vs_viewport( struct pt_post_vs *pvs,
    for (j = 0; j < info->count; j++) {
       float *position = out->data[pos];
 
+      initialize_vertex_header(out);
       /* Viewport mapping only, no cliptest/rhw divide
        */
       position[0] = position[0] * scale[0] + trans[0];