From 41643e268e318d62ca6e7f9d16c12dc2dbba74c6 Mon Sep 17 00:00:00 2001
From: Yuri Roubinsky <chaosus89@gmail.com>
Date: Thu, 13 Feb 2020 21:02:47 +0300
Subject: [PATCH] Prevent usage 'out' modifier on opaque shader types (textures
 currently)

---
 servers/visual/shader_language.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/servers/visual/shader_language.cpp b/servers/visual/shader_language.cpp
index 61664893024..76348373c92 100644
--- a/servers/visual/shader_language.cpp
+++ b/servers/visual/shader_language.cpp
@@ -6273,6 +6273,13 @@ Error ShaderLanguage::_parse_shader(const Map<StringName, FunctionInfo> &p_funct
 						return ERR_PARSE_ERROR;
 					}
 
+					if (qualifier == ARGUMENT_QUALIFIER_OUT || qualifier == ARGUMENT_QUALIFIER_INOUT) {
+						if (is_sampler_type(get_token_datatype(tk.type))) {
+							_set_error("Opaque types cannot be output parameters.");
+							return ERR_PARSE_ERROR;
+						}
+					}
+
 					if (is_struct) {
 						ptype = TYPE_STRUCT;
 					} else {