Mesa (master): ureg: support centroid interpolation

[Luca Barbieri]

Module: Mesa
Branch: master
Commit: ff531c5b05cb4c078b42c6b14e707646d3d158c9
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=ff531c5b05cb4c078b42c6b14e707646d3d158c9

Author: Luca Barbieri <luca at luca-barbieri.com>
Date:   Mon Sep 27 18:07:45 2010 +0200

ureg: support centroid interpolation

---

 src/gallium/auxiliary/tgsi/tgsi_ureg.c |   16 +++++++++++-----
 src/gallium/auxiliary/tgsi/tgsi_ureg.h |   24 ++++++++++++++++++++----
 2 files changed, 31 insertions(+), 9 deletions(-)

diff --git a/src/gallium/auxiliary/tgsi/tgsi_ureg.c b/src/gallium/auxiliary/tgsi/tgsi_ureg.c
index 3cf6893..7d13a17 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_ureg.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_ureg.c
@@ -96,7 +96,8 @@ struct ureg_program
       unsigned semantic_name;
       unsigned semantic_index;
       unsigned interp;
-      unsigned cylindrical_wrap;
+      unsigned char cylindrical_wrap;
+      unsigned char centroid;
    } fs_input[UREG_MAX_INPUT];
    unsigned nr_fs_inputs;
 
@@ -286,11 +287,12 @@ ureg_property_fs_coord_pixel_center(struct ureg_program *ureg,
 
 
 struct ureg_src
-ureg_DECL_fs_input_cyl(struct ureg_program *ureg,
+ureg_DECL_fs_input_cyl_centroid(struct ureg_program *ureg,
                        unsigned semantic_name,
                        unsigned semantic_index,
                        unsigned interp_mode,
-                       unsigned cylindrical_wrap)
+                       unsigned cylindrical_wrap,
+                       unsigned centroid)
 {
    unsigned i;
 
@@ -306,6 +308,7 @@ ureg_DECL_fs_input_cyl(struct ureg_program *ureg,
       ureg->fs_input[i].semantic_index = semantic_index;
       ureg->fs_input[i].interp = interp_mode;
       ureg->fs_input[i].cylindrical_wrap = cylindrical_wrap;
+      ureg->fs_input[i].centroid = centroid;
       ureg->nr_fs_inputs++;
    } else {
       set_bad(ureg);
@@ -1126,7 +1129,8 @@ emit_decl_fs(struct ureg_program *ureg,
              unsigned semantic_name,
              unsigned semantic_index,
              unsigned interpolate,
-             unsigned cylindrical_wrap)
+             unsigned cylindrical_wrap,
+             unsigned centroid)
 {
    union tgsi_any_token *out = get_tokens(ureg, DOMAIN_DECL, 3);
 
@@ -1138,6 +1142,7 @@ emit_decl_fs(struct ureg_program *ureg,
    out[0].decl.Interpolate = interpolate;
    out[0].decl.Semantic = 1;
    out[0].decl.CylindricalWrap = cylindrical_wrap;
+   out[0].decl.Centroid = centroid;
 
    out[1].value = 0;
    out[1].decl_range.First = index;
@@ -1287,7 +1292,8 @@ static void emit_decls( struct ureg_program *ureg )
                       ureg->fs_input[i].semantic_name,
                       ureg->fs_input[i].semantic_index,
                       ureg->fs_input[i].interp,
-                      ureg->fs_input[i].cylindrical_wrap);
+                      ureg->fs_input[i].cylindrical_wrap,
+                      ureg->fs_input[i].centroid);
       }
    } else {
       for (i = 0; i < ureg->nr_gs_inputs; i++) {
diff --git a/src/gallium/auxiliary/tgsi/tgsi_ureg.h b/src/gallium/auxiliary/tgsi/tgsi_ureg.h
index 07fb01a..acc4632 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_ureg.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_ureg.h
@@ -158,11 +158,27 @@ ureg_property_fs_coord_pixel_center(struct ureg_program *ureg,
  */
 
 struct ureg_src
-ureg_DECL_fs_input_cyl(struct ureg_program *,
+ureg_DECL_fs_input_cyl_centroid(struct ureg_program *,
                        unsigned semantic_name,
                        unsigned semantic_index,
                        unsigned interp_mode,
-                       unsigned cylindrical_wrap);
+                       unsigned cylindrical_wrap,
+                       unsigned centroid);
+
+static INLINE struct ureg_src
+ureg_DECL_fs_input_cyl(struct ureg_program *ureg,
+                       unsigned semantic_name,
+                       unsigned semantic_index,
+                       unsigned interp_mode,
+                       unsigned cylindrical_wrap)
+{
+   return ureg_DECL_fs_input_cyl_centroid(ureg,
+                                 semantic_name,
+                                 semantic_index,
+                                 interp_mode,
+                                 cylindrical_wrap,
+                                 0);
+}
 
 static INLINE struct ureg_src
 ureg_DECL_fs_input(struct ureg_program *ureg,
@@ -170,11 +186,11 @@ ureg_DECL_fs_input(struct ureg_program *ureg,
                    unsigned semantic_index,
                    unsigned interp_mode)
 {
-   return ureg_DECL_fs_input_cyl(ureg,
+   return ureg_DECL_fs_input_cyl_centroid(ureg,
                                  semantic_name,
                                  semantic_index,
                                  interp_mode,
-                                 0);
+                                 0, 0);
 }
 
 struct ureg_src