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path: root/src/gallium/auxiliary/draw/draw_vs_exec.c
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Diffstat (limited to 'src/gallium/auxiliary/draw/draw_vs_exec.c')
-rw-r--r--src/gallium/auxiliary/draw/draw_vs_exec.c6
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 667eb50785..c41d7c42a0 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);