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-rw-r--r--src/mesa/state_tracker/st_extensions.c2
-rw-r--r--src/mesa/state_tracker/st_program.c4
2 files changed, 6 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index 982413568a4..b8b3d504a76 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -816,6 +816,8 @@ void st_init_extensions(struct st_context *st)
ctx->Const.ViewportBounds.Max = 16384.0;
ctx->Extensions.ARB_viewport_array = GL_TRUE;
ctx->Extensions.ARB_fragment_layer_viewport = GL_TRUE;
+ if (ctx->Extensions.AMD_vertex_shader_layer)
+ ctx->Extensions.AMD_vertex_shader_viewport_index = GL_TRUE;
}
}
if (ctx->Const.MaxProgramTextureGatherComponents > 0)
diff --git a/src/mesa/state_tracker/st_program.c b/src/mesa/state_tracker/st_program.c
index 1df411c3b87..3570557fee6 100644
--- a/src/mesa/state_tracker/st_program.c
+++ b/src/mesa/state_tracker/st_program.c
@@ -262,6 +262,10 @@ st_prepare_vertex_program(struct gl_context *ctx,
stvp->output_semantic_name[slot] = TGSI_SEMANTIC_LAYER;
stvp->output_semantic_index[slot] = 0;
break;
+ case VARYING_SLOT_VIEWPORT:
+ stvp->output_semantic_name[slot] = TGSI_SEMANTIC_VIEWPORT_INDEX;
+ stvp->output_semantic_index[slot] = 0;
+ break;
case VARYING_SLOT_TEX0:
case VARYING_SLOT_TEX1: