Outputs that are linked to inputs in the next stage must be output to stream 0,
otherwise we should fail to link.
---
src/glsl/link_varyings.cpp | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/src/glsl/link_varyings.cpp b/src/glsl/link_varyings.cpp
index 9725a43..3b20594 100644
--- a/src/glsl/link_varyings.cpp
+++ b/src/glsl/link_varyings.cpp
@@ -1345,6 +1345,14 @@ assign_varying_locations(struct gl_context *ctx,
if (input_var || (prog->SeparateShader && consumer == NULL)) {
matches.record(output_var, input_var);
}
+
+ /* Only stream 0 outputs can be consumed in the next stage */
+ if (input_var && output_var->data.stream != 0) {
+ linker_error(prog, "output %s is assigned to stream=%d but "
+ "is linked to an input, which requires stream=0",
+ output_var->name, output_var->data.stream);
+ return false;
+ }
}
} else {
/* If there's no producer stage, then this must be a separable program.
--
1.9.1
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