From 93c263953956490c30e3604578d6eb0b5440264b Mon Sep 17 00:00:00 2001
From: Joshua Goins <josh@redstrate.com>
Date: Tue, 15 Feb 2022 11:29:56 -0500
Subject: [PATCH] Enable Metal by default on SDL backend

---
 platforms/sdl/CMakeLists.txt |  7 +++++++
 platforms/sdl/main.cpp.in    | 14 +++++++++++++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/platforms/sdl/CMakeLists.txt b/platforms/sdl/CMakeLists.txt
index e88f259..3d1cd78 100644
--- a/platforms/sdl/CMakeLists.txt
+++ b/platforms/sdl/CMakeLists.txt
@@ -1,5 +1,11 @@
 include(../../cmake/AddPlatformExecutable.cmake)
 
+if(ENABLE_MACOS)
+    find_library(METAL Metal)
+
+    set(EXTRA_LIBRARIES ${METAL})
+endif()
+
 add_platform(
         SRC ${CMAKE_CURRENT_SOURCE_DIR}/file.cpp
         MAIN_FILE
@@ -12,6 +18,7 @@ add_platform(
         Core
         GFXVulkan
         GFXMetal
+        ${EXTRA_LIBRARIES}
 )
 
 function(add_platform_commands target)
diff --git a/platforms/sdl/main.cpp.in b/platforms/sdl/main.cpp.in
index 26f78e2..0525733 100644
--- a/platforms/sdl/main.cpp.in
+++ b/platforms/sdl/main.cpp.in
@@ -87,7 +87,11 @@ bool platform::supports_feature(const PlatformFeature feature) {
 platform::window_ptr platform::open_window(const std::string_view title, const prism::Rectangle rect, const WindowFlags flags) {
     auto& win = windows.emplace_back();
 
-    int sdl_flags = SDL_WINDOW_VULKAN | SDL_WINDOW_ALLOW_HIGHDPI;
+    int sdl_flags = SDL_WINDOW_ALLOW_HIGHDPI;
+    #ifndef ENABLE_METAL
+    sdl_flags |= SDL_WINDOW_VULKAN;
+    #endif
+
     if(flags & WindowFlags::Borderless)
         sdl_flags |= SDL_WINDOW_BORDERLESS;
 
@@ -299,6 +303,10 @@ void platform::end_text_input() {
 int main(int argc, char* argv[]) {
     SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER);
 
+#ifdef ENABLE_METAL
+    SDL_setenv("METAL_DEVICE_WRAPPER_TYPE", "1", 0);
+#endif
+
     engine = new prism::engine(argc, argv);
 
     app = new @APP_CLASS@();
@@ -306,7 +314,11 @@ int main(int argc, char* argv[]) {
 
     GFXCreateInfo info = {};
 
+#ifdef ENABLE_METAL
+    gfx_interface = new GFXMetal();
+#else
     gfx_interface = new GFXVulkan();
+#endif
     if(gfx_interface->initialize(info)) {
         engine->set_gfx(gfx_interface);
     } else {