Metal: enable for betsy and lightmapper modules

To support this, the rendering_context_driver_metal.h header was updated
to recognise when it is included in non-Objective-C source files.

1 files changed, 12 insertions, 0 deletions

diff --git a/servers/display_server.cpp b/servers/display_server.cpp
index 8cb3e560ac..12456fc828 100644
--- a/servers/display_server.cpp
+++ b/servers/display_server.cpp
@@ -41,6 +41,9 @@
 #if defined(D3D12_ENABLED)
 #include "drivers/d3d12/rendering_context_driver_d3d12.h"
 #endif
+#if defined(METAL_ENABLED)
+#include "drivers/metal/rendering_context_driver_metal.h"
+#endif
 
 DisplayServer *DisplayServer::singleton = nullptr;
 
@@ -1232,6 +1235,15 @@ bool DisplayServer::can_create_rendering_device() {
 		rcd = memnew(RenderingContextDriverD3D12);
 	}
 #endif
+#ifdef METAL_ENABLED
+	if (rcd == nullptr) {
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunguarded-availability"
+		// Eliminate "RenderingContextDriverMetal is only available on iOS 14.0 or newer".
+		rcd = memnew(RenderingContextDriverMetal);
+#pragma clang diagnostic pop
+	}
+#endif
 
 	if (rcd != nullptr) {
 		err = rcd->initialize();