Mesa (master): draw: setup instance ID for VS interpreter

[Brian Paul]

Module: Mesa
Branch: master
Commit: 0be042cb4d256393750f7060d79bdaa2cd47d72e
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=0be042cb4d256393750f7060d79bdaa2cd47d72e

Author: Brian Paul <brianp at vmware.com>
Date:   Wed Dec  8 19:00:32 2010 -0700

draw: setup instance ID for VS interpreter

---

 src/gallium/auxiliary/draw/draw_vs_exec.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/src/gallium/auxiliary/draw/draw_vs_exec.c b/src/gallium/auxiliary/draw/draw_vs_exec.c
index dab3eb1..08608b4 100644
--- a/src/gallium/auxiliary/draw/draw_vs_exec.c
+++ b/src/gallium/auxiliary/draw/draw_vs_exec.c
@@ -99,6 +99,12 @@ vs_exec_run_linear( struct draw_vertex_shader *shader,
    tgsi_exec_set_constant_buffers(machine, PIPE_MAX_CONSTANT_BUFFERS,
                                   constants, const_size);
 
+   if (shader->info.uses_instanceid) {
+      unsigned i = machine->SysSemanticToIndex[TGSI_SEMANTIC_INSTANCEID];
+      assert(i < Elements(machine->SystemValue));
+      machine->SystemValue[i][0] = shader->draw->instance_id;
+   }
+
    for (i = 0; i < count; i += MAX_TGSI_VERTICES) {
       unsigned int max_vertices = MIN2(MAX_TGSI_VERTICES, count - i);