fix headless import attempting to load graphics driver

2 files changed, 8 insertions, 1 deletions

diff --git a/servers/display_server.cpp b/servers/display_server.cpp
index ce0d6cb996..dd976c4b26 100644
--- a/servers/display_server.cpp
+++ b/servers/display_server.cpp
@@ -1229,6 +1229,10 @@ void DisplayServer::_input_set_custom_mouse_cursor_func(const Ref<Resource> &p_i
 }
 
 bool DisplayServer::can_create_rendering_device() {
+	if (get_singleton()->get_name() == "headless") {
+		return false;
+	}
+
 #if defined(RD_ENABLED)
 	RenderingDevice *device = RenderingDevice::get_singleton();
 	if (device) {
diff --git a/servers/rendering/rendering_device_binds.cpp b/servers/rendering/rendering_device_binds.cpp
index d9ca286b15..e41a56b0a3 100644
--- a/servers/rendering/rendering_device_binds.cpp
+++ b/servers/rendering/rendering_device_binds.cpp
@@ -31,7 +31,10 @@
 #include "rendering_device_binds.h"
 
 Error RDShaderFile::parse_versions_from_text(const String &p_text, const String p_defines, OpenIncludeFunction p_include_func, void *p_include_func_userdata) {
-	ERR_FAIL_NULL_V(RenderingDevice::get_singleton(), ERR_UNAVAILABLE);
+	ERR_FAIL_NULL_V_MSG(
+			RenderingDevice::get_singleton(),
+			ERR_UNAVAILABLE,
+			"Cannot import custom .glsl shaders when running without a RenderingDevice. This can happen if you are using the headless more or the Compatibility backend.");
 
 	Vector<String> lines = p_text.split("\n");