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-rw-r--r--src/glsl/ast_to_hir.cpp19
1 files changed, 19 insertions, 0 deletions
diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp
index 6770eed343..67202dfc3c 100644
--- a/src/glsl/ast_to_hir.cpp
+++ b/src/glsl/ast_to_hir.cpp
@@ -2158,6 +2158,25 @@ ast_declarator_list::hir(exec_list *instructions,
}
}
+ /* Integer vertex outputs must be qualified with 'flat'.
+ *
+ * From section 4.3.6 of the GLSL 1.30 spec:
+ * "If a vertex output is a signed or unsigned integer or integer
+ * vector, then it must be qualified with the interpolation qualifier
+ * flat."
+ */
+ if (state->language_version >= 130
+ && state->target == vertex_shader
+ && state->current_function == NULL
+ && var->type->is_integer()
+ && var->mode == ir_var_out
+ && var->interpolation != ir_var_flat) {
+
+ _mesa_glsl_error(&loc, state, "If a vertex output is an integer, "
+ "then it must be qualified with 'flat'");
+ }
+
+
/* Process the initializer and add its instructions to a temporary
* list. This list will be added to the instruction stream (below) after
* the declaration is added. This is done because in some cases (such as