Add a `--fullscreen` CLI option

src/pc/cliopts.c

@@ -6,7 +6,8 @@ struct PCCLIOptions gCLIOpts;
 void parse_cli_opts(int argc, char* argv[])
 {
 	// Initialize options with false values. 
-	gCLIOpts.SkipIntro = 0;
+	gCLIOpts.SkipIntro  = 0;
+    gCLIOpts.FullScreen = 0;
 
 	// Scan arguments for options
 	if (argc > 1)
@@ -16,6 +17,9 @@ void parse_cli_opts(int argc, char* argv[])
 		{
 			if (strcmp(argv[i], "--skip-intro") == 0) // Skip Peach Intro
 				gCLIOpts.SkipIntro = 1;
+
+            if (strcmp(argv[i], "--fullscreen") == 0) // Open game in fullscreen
+                gCLIOpts.FullScreen = 1;            
 		}
 	}
 }

src/pc/cliopts.h

@@ -3,8 +3,9 @@
 struct PCCLIOptions 
 {
 	u8 SkipIntro;
+    u8 FullScreen;
 };
 
 extern struct PCCLIOptions gCLIOpts;
 
-void parse_cli_opts(int argc, char* argv[]);
+void parse_cli_opts(int argc, char* argv[]);

src/pc/gfx/gfx_sdl2.c

@@ -19,6 +19,7 @@
 #include "gfx_window_manager_api.h"
 #include "gfx_screen_config.h"
 #include "../configfile.h"
+#include "../cliopts.h"
 
 #include "src/pc/controller/controller_keyboard.h"
 
@@ -113,6 +114,10 @@ static void gfx_sdl_init(void) {
 
     window_flags = SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE;
 
+    if (gCLIOpts.FullScreen) {
+        configFullscreen = true;
+    }
+
     if (configFullscreen) {
         window_flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
     }