diff options
Diffstat (limited to 'src/glsl/ast_to_hir.cpp')
| -rw-r--r-- | src/glsl/ast_to_hir.cpp | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp index 2c63de095b9..acb5c763c43 100644 --- a/src/glsl/ast_to_hir.cpp +++ b/src/glsl/ast_to_hir.cpp @@ -4205,6 +4205,27 @@ ast_function::hir(exec_list *instructions, emit_function(state, f); } + /* From GLSL ES 3.0 spec, chapter 6.1 "Function Definitions", page 71: + * + * "A shader cannot redefine or overload built-in functions." + * + * While in GLSL ES 1.0 specification, chapter 8 "Built-in Functions": + * + * "User code can overload the built-in functions but cannot redefine + * them." + */ + if (state->es_shader && state->language_version >= 300) { + /* Local shader has no exact candidates; check the built-ins. */ + _mesa_glsl_initialize_builtin_functions(); + if (_mesa_glsl_find_builtin_function_by_name(state, name)) { + YYLTYPE loc = this->get_location(); + _mesa_glsl_error(& loc, state, + "A shader cannot redefine or overload built-in " + "function `%s' in GLSL ES 3.00", name); + return NULL; + } + } + /* Verify that this function's signature either doesn't match a previously * seen signature for a function with the same name, or, if a match is found, * that the previously seen signature does not have an associated definition. |