Mesa (master): st/mesa: add support for viewport index semantic

[Dave Airlie]

Module: Mesa
Branch: master
Commit: c116ee604260faca75aaf2b0d8bbbd78b9c71154
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=c116ee604260faca75aaf2b0d8bbbd78b9c71154

Author: Dave Airlie <airlied at redhat.com>
Date:   Tue Jan 21 14:55:59 2014 +1000

st/mesa: add support for viewport index semantic

This adds GS output and FS input support, even though FS input
support isn't supported until GLSL 4.30 from what I can see.

Signed-off-by: Dave Airlie <airlied at redhat.com>

---

 src/mesa/state_tracker/st_program.c |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/mesa/state_tracker/st_program.c b/src/mesa/state_tracker/st_program.c
index cadbe17..438d52c 100644
--- a/src/mesa/state_tracker/st_program.c
+++ b/src/mesa/state_tracker/st_program.c
@@ -572,6 +572,11 @@ st_translate_fragment_program(struct st_context *st,
             input_semantic_index[slot] = 0;
             interpMode[slot] = TGSI_INTERPOLATE_CONSTANT;
             break;
+         case VARYING_SLOT_VIEWPORT:
+            input_semantic_name[slot] = TGSI_SEMANTIC_VIEWPORT_INDEX;
+            input_semantic_index[slot] = 0;
+            interpMode[slot] = TGSI_INTERPOLATE_CONSTANT;
+            break;
          case VARYING_SLOT_CLIP_DIST0:
             input_semantic_name[slot] = TGSI_SEMANTIC_CLIPDIST;
             input_semantic_index[slot] = 0;
@@ -1027,6 +1032,10 @@ st_translate_geometry_program(struct st_context *st,
             gs_output_semantic_name[slot] = TGSI_SEMANTIC_PRIMID;
             gs_output_semantic_index[slot] = 0;
             break;
+         case VARYING_SLOT_VIEWPORT:
+            gs_output_semantic_name[slot] = TGSI_SEMANTIC_VIEWPORT_INDEX;
+            gs_output_semantic_index[slot] = 0;
+            break;
          case VARYING_SLOT_TEX0:
          case VARYING_SLOT_TEX1:
          case VARYING_SLOT_TEX2: