Add Nintendo Switch support

- Bundle resources folder through romfs
- Added Switch-exclusive romfs init/exit code
- Add icon for NRO
- Add Switch-exclusive CMake code for NACP/NRO generation
- Add GitHub Actions Switch workflow

.github/workflows/switch.yml

@@ -0,0 +1,27 @@
+name: Nintendo Switch Build
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    container: devkitpro/devkita64:latest
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: true
+
+    - name: Build
+      run: |
+        mkdir -p out/switch
+        cd out/switch
+        /opt/devkitpro/portlibs/switch/bin/aarch64-none-elf-cmake -DCMAKE_BUILD_TYPE=Release ../../src/
+        make
+        mkdir system3
+        mv system3.* system3/
+
+    - name: Upload artifacts
+      uses: actions/upload-artifact@v2
+      with:
+        name: system3-switch
+        path: out/switch/system3

src/CMakeLists.txt

@@ -178,6 +178,22 @@ target_sources(system3 PRIVATE
   sys/nact_sys3.cpp
   )
 
+if(NINTENDO_SWITCH)
+  set(RESOURCE_PATH romfs:/)
+
+  nx_generate_nacp(system3.nacp
+    NAME "system3"
+    AUTHOR "kichikuou"
+    VERSION "0.8.0"
+  )
+
+  nx_create_nro(system3
+    NACP system3.nacp
+    ICON "../switch/icon.jpg"
+    ROMFS "../resources"
+  )
+endif()
+
 target_compile_definitions(system3 PRIVATE
   $<$<CONFIG:Debug>:_DEBUG_CONSOLE>
   RESOURCE_PATH="${RESOURCE_PATH}")

src/sdlmain.cpp

@@ -13,6 +13,9 @@
 #include <emscripten.h>
 #include <emscripten/html5.h>
 #endif
+#ifdef __SWITCH__
+#include <switch.h>
+#endif
 
 SDL_Window* g_window;
 SDL_Renderer* g_renderer;
@@ -20,6 +23,9 @@ NACT* g_nact;
 
 int main(int argc, char *argv[])
 {
+#ifdef __SWITCH__
+	romfsInit();
+#endif
 	Config config(argc, argv);
 
 	if (!config.timidity_cfg.empty()) {
@@ -94,6 +100,10 @@ int main(int argc, char *argv[])
 	SDL_DestroyWindow(g_window);
 	SDL_Quit();
 
+#ifdef __SWITCH__
+	romfsExit();
+#endif
+
     return 0;
 }