Make GDNative DLLs work on UWP

1 files changed, 45 insertions, 0 deletions

diff --git a/platform/uwp/os_uwp.cpp b/platform/uwp/os_uwp.cpp
index 3018ac0bef..15bb6fbcf2 100644
--- a/platform/uwp/os_uwp.cpp
+++ b/platform/uwp/os_uwp.cpp
@@ -745,6 +745,51 @@ void OSUWP::hide_virtual_keyboard() {
 	pane->TryHide();
 }
 
+static String format_error_message(DWORD id) {
+
+	LPWSTR messageBuffer = NULL;
+	size_t size = FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
+			NULL, id, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPWSTR)&messageBuffer, 0, NULL);
+
+	String msg = "Error " + itos(id) + ": " + String(messageBuffer, size);
+
+	LocalFree(messageBuffer);
+
+	return msg;
+}
+
+Error OSUWP::open_dynamic_library(const String p_path, void *&p_library_handle, bool p_also_set_library_path) {
+
+	String full_path = "game/" + p_path;
+	p_library_handle = (void *)LoadPackagedLibrary(full_path.c_str(), 0);
+
+	if (!p_library_handle) {
+		ERR_EXPLAIN("Can't open dynamic library: " + full_path + ". Error: " + format_error_message(GetLastError()));
+		ERR_FAIL_V(ERR_CANT_OPEN);
+	}
+	return OK;
+}
+
+Error OSUWP::close_dynamic_library(void *p_library_handle) {
+	if (!FreeLibrary((HMODULE)p_library_handle)) {
+		return FAILED;
+	}
+	return OK;
+}
+
+Error OSUWP::get_dynamic_library_symbol_handle(void *p_library_handle, const String p_name, void *&p_symbol_handle, bool p_optional) {
+	p_symbol_handle = (void *)GetProcAddress((HMODULE)p_library_handle, p_name.utf8().get_data());
+	if (!p_symbol_handle) {
+		if (!p_optional) {
+			ERR_EXPLAIN("Can't resolve symbol " + p_name + ". Error: " + String::num(GetLastError()));
+			ERR_FAIL_V(ERR_CANT_RESOLVE);
+		} else {
+			return ERR_CANT_RESOLVE;
+		}
+	}
+	return OK;
+}
+
 void OSUWP::run() {
 
 	if (!main_loop)