draw: nuke the interp parameter from vertex_info

draw emit couldn't care less what the interpolation mode is...
This somehow looked like it would matter, all drivers more or less
dutifully filled that in correctly. But this is only used for emit,
if draw needs to know about interpolation mode (for clipping for instance)
it will get that information from the vs anyway.
softpipe actually used to depend on that interpolation parameter, as it
abused that structure quite a bit but no longer.

Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>

1 files changed, 1 insertions, 16 deletions

diff --git a/src/gallium/auxiliary/draw/draw_vertex.h b/src/gallium/auxiliary/draw/draw_vertex.h
index ae207e2..c7b1afe 100644
--- a/src/gallium/auxiliary/draw/draw_vertex.h
+++ b/src/gallium/auxiliary/draw/draw_vertex.h
@@ -62,18 +62,6 @@ enum attrib_emit {
 
 
 /**
- * Attribute interpolation mode
- */
-enum interp_mode {
-   INTERP_NONE,      /**< never interpolate vertex header info */
-   INTERP_POS,       /**< special case for frag position */
-   INTERP_CONSTANT,
-   INTERP_LINEAR,
-   INTERP_PERSPECTIVE
-};
-
-
-/**
  * Information about hardware/rasterization vertex layout.
  */
 struct vertex_info
@@ -86,8 +74,7 @@ struct vertex_info
     * memcmp() comparisons.
     */
    struct {
-      unsigned interp_mode:4;      /**< INTERP_x */
-      unsigned emit:4;             /**< EMIT_x */
+      unsigned emit:8;             /**< EMIT_x */
       unsigned src_index:8;          /**< map to post-xform attribs */
    } attrib[PIPE_MAX_SHADER_OUTPUTS];
 };
@@ -125,7 +112,6 @@ draw_vinfo_copy( struct vertex_info *dst,
 static inline uint
 draw_emit_vertex_attr(struct vertex_info *vinfo,
                       enum attrib_emit emit, 
-                      enum interp_mode interp, /* only used by softpipe??? */
                       int src_index)
 {
    const uint n = vinfo->num_attribs;
@@ -138,7 +124,6 @@ draw_emit_vertex_attr(struct vertex_info *vinfo,
 
    assert(n < Elements(vinfo->attrib));
    vinfo->attrib[n].emit = emit;
-   vinfo->attrib[n].interp_mode = interp;
    vinfo->attrib[n].src_index = src_index;
    vinfo->num_attribs++;
    return n;