glsl: Allow overloading of built-ins without hiding in GLSL ES.

The rules are explicitly different from desktop GLSL.

diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp
index b8a01b8..8322dbf 100644 (file)
--- a/src/glsl/ast_to_hir.cpp
+++ b/src/glsl/ast_to_hir.cpp
@@ -2279,7 +2279,7 @@ ast_function::hir(exec_list *instructions,
     * that the previously seen signature does not have an associated definition.
     */
    f = state->symbols->get_function(name);
-   if (f != NULL && !f->has_builtin_signature()) {
+   if (f != NULL && (state->es_shader || !f->has_builtin_signature())) {
       sig = f->exact_matching_signature(&hir_parameters);
       if (sig != NULL) {
         const char *badvar = sig->qualifiers_match(&hir_parameters);