Allow enabling specific gfx backends via program args

Makefile

@@ -491,7 +491,7 @@ PLATFORM_CFLAGS += -DNO_SEGMENTED_MEMORY -DUSE_SYSTEM_MALLOC
 # Compiler and linker flags for graphics backend
 ifeq ($(ENABLE_OPENGL),1)
   # TODO: right now the opengl and vulkan backends are linked, will seperate later...
-  GFX_CFLAGS  := -DENABLE_OPENGL -DENABLE_VULKAN
+  GFX_CFLAGS  := -DENABLE_OPENGL -DENABLE_VULKAN -DENABLE_GFX_DUMMY
   GFX_LDFLAGS :=
   ifeq ($(TARGET_WINDOWS),1)
     GFX_CFLAGS  += $(shell sdl2-config --cflags) -DGLEW_STATIC

src/pc/gfx/gfx_dummy.c

@@ -151,6 +151,10 @@ static void gfx_dummy_renderer_end_frame(void) {
 static void gfx_dummy_renderer_finish_render(void) {
 }
 
+const char* gfx_dummy_get_name(void) {
+    return "Dummy";
+}
+
 struct GfxWindowManagerAPI gfx_dummy_wm_api = {
     gfx_dummy_wm_init,
     gfx_dummy_wm_set_keyboard_callbacks,
@@ -187,6 +191,7 @@ struct GfxRenderingAPI gfx_dummy_renderer_api = {
     gfx_dummy_renderer_on_resize,
     gfx_dummy_renderer_start_frame,
     gfx_dummy_renderer_end_frame,
-    gfx_dummy_renderer_finish_render
+    gfx_dummy_renderer_finish_render,
+    gfx_dummy_get_name
 };
 #endif

src/pc/pc_main.c

@@ -1,4 +1,5 @@
 #include <stdlib.h>
+#include <string.h>
 
 #ifdef TARGET_WEB
 #include <emscripten.h>
@@ -100,39 +101,6 @@ void produce_one_frame(void) {
     gfx_end_frame();
 }
 
-#ifdef TARGET_WEB
-static void em_main_loop(void) {
-}
-
-static void request_anim_frame(void (*func)(double time)) {
-    EM_ASM(requestAnimationFrame(function(time) {
-        dynCall("vd", $0, [time]);
-    }), func);
-}
-
-static void on_anim_frame(double time) {
-    static double target_time;
-
-    time *= 0.03; // milliseconds to frame count (33.333 ms -> 1)
-
-    if (time >= target_time + 10.0) {
-        // We are lagging 10 frames behind, probably due to coming back after inactivity,
-        // so reset, with a small margin to avoid potential jitter later.
-        target_time = time - 0.010;
-    }
-
-    for (int i = 0; i < 2; i++) {
-        // If refresh rate is 15 Hz or something we might need to generate two frames
-        if (time >= target_time) {
-            produce_one_frame();
-            target_time = target_time + 1.0;
-        }
-    }
-
-    request_anim_frame(on_anim_frame);
-}
-#endif
-
 static void save_config(void) {
     configfile_save(CONFIG_FILE);
 }
@@ -141,7 +109,7 @@ static void on_fullscreen_changed(bool is_now_fullscreen) {
     configFullscreen = is_now_fullscreen;
 }
 
-void main_func(void) {
+int main(int argc, char *argv[]) {
 #ifdef USE_SYSTEM_MALLOC
     main_pool_init();
     gGfxAllocOnlyPool = alloc_only_pool_init();
@@ -154,35 +122,48 @@ void main_func(void) {
     configfile_load(CONFIG_FILE);
     atexit(save_config);
 
-#ifdef TARGET_WEB
-    emscripten_set_main_loop(em_main_loop, 0, 0);
-    request_anim_frame(on_anim_frame);
-#endif
+    int ogl_vulkan_dummy = 0;
+
+    for(int i = 1; i < argc; i++) {
+        if(strcmp(argv[i], "-opengl") == 0) {
+            ogl_vulkan_dummy = 0;
+        }
+
+        if(strcmp(argv[i], "-vulkan") == 0) {
+            ogl_vulkan_dummy = 1;
+        }
+
+        if(strcmp(argv[i], "-dummy") == 0) {
+            ogl_vulkan_dummy = 2;
+        }
+    }
 
-#if defined(ENABLE_DX12)
-    rendering_api = &gfx_direct3d12_api;
-    wm_api = &gfx_dxgi_api;
-#elif defined(ENABLE_DX11)
-    rendering_api = &gfx_direct3d11_api;
-    wm_api = &gfx_dxgi_api;
-#elif defined(ENABLE_OPENGL)
-    rendering_api = &gfx_vulkan_api;
     wm_api = &gfx_sdl;
-#elif defined(ENABLE_GFX_DUMMY)
-    rendering_api = &gfx_dummy_renderer_api;
-    wm_api = &gfx_dummy_wm_api;
-#endif
 
-    gfx_init(wm_api, rendering_api, "Super Mario 64 PC-Port", configFullscreen);
-    
+    switch(ogl_vulkan_dummy) {
+        case 0:
+        {
+            rendering_api = &gfx_opengl_api;
+        }
+            break;
+        case 1:
+        {
+            rendering_api = &gfx_vulkan_api;
+        }
+            break;
+        case 2:
+        {
+            rendering_api = &gfx_dummy_renderer_api;
+        }
+            break;
+    }
+
+
+    gfx_init(wm_api, rendering_api, "Super Mario 64", configFullscreen);
+
     wm_api->set_fullscreen_changed_callback(on_fullscreen_changed);
     wm_api->set_keyboard_callbacks(keyboard_on_key_down, keyboard_on_key_up, keyboard_on_all_keys_up);
-    
-#if HAVE_WASAPI
-    if (audio_api == NULL && audio_wasapi.init()) {
-        audio_api = &audio_wasapi;
-    }
-#endif
+
 #if HAVE_PULSE_AUDIO
     if (audio_api == NULL && audio_pulse.init()) {
         audio_api = &audio_pulse;
@@ -193,11 +174,7 @@ void main_func(void) {
         audio_api = &audio_alsa;
     }
 #endif
-#ifdef TARGET_WEB
-    if (audio_api == NULL && audio_sdl.init()) {
-        audio_api = &audio_sdl;
-    }
-#endif
+
     if (audio_api == NULL) {
         audio_api = &audio_null;
     }
@@ -206,28 +183,10 @@ void main_func(void) {
     sound_init();
 
     thread5_game_loop(NULL);
-#ifdef TARGET_WEB
-    /*for (int i = 0; i < atoi(argv[1]); i++) {
-        game_loop_one_iteration();
-    }*/
-    inited = 1;
-#else
     inited = 1;
     while (1) {
         wm_api->main_loop(produce_one_frame);
     }
-#endif
-}
 
-#if defined(_WIN32) || defined(_WIN64)
-#include <windows.h>
-int WINAPI WinMain(UNUSED HINSTANCE hInstance, UNUSED HINSTANCE hPrevInstance, UNUSED LPSTR pCmdLine, UNUSED int nCmdShow) {
-    main_func();
     return 0;
-}
-#else
-int main(UNUSED int argc, UNUSED char *argv[]) {
-    main_func();
-    return 0;
-}
-#endif
+}