@@ -101,6 +101,7 @@ uxnemu orca.rom | shim

 - `F4` reboot

 - `F5` soft reboot

 - `F11` toggle fullscreen

+- `F12` toggle decorations

 ### GUI Buttons

@@ -56,7 +56,7 @@ static SDL_Thread *stdin_thread;

 /* devices */

 static int window_created = 0;

-static int fullscreen = 0;

+static int fullscreen = 0, borderless = 0;

 static Uint32 stdin_event, audio0_event, zoom = 1;

 static Uint64 exec_deadline, deadline_interval, ms_interval;

@@ -189,9 +189,9 @@ set_zoom(Uint8 z, int win)

 }

 static void

-set_fullscreen(int new_fullscreen, int win)

+set_fullscreen(int value, int win)

 {

-	fullscreen = new_fullscreen;

+	fullscreen = value;

 	Uint32 flags = 0; /* windowed mode; SDL2 has no constant for this */

 	if(fullscreen) {

 		flags = SDL_WINDOW_FULLSCREEN_DESKTOP;

@@ -200,6 +200,13 @@ set_fullscreen(int new_fullscreen, int win)

 		SDL_SetWindowFullscreen(emu_window, flags);

 }

+static void

+set_borderless(int value)

+{

+	borderless = value;

+	SDL_SetWindowBordered(emu_window, !value);

+}

+

 /* emulator primitives */

 int

@@ -405,6 +412,8 @@ handle_events(Uxn *u)

 				emu_restart(u, boot_rom, 1);

 			else if(event.key.keysym.sym == SDLK_F11)

 				set_fullscreen(!fullscreen, 1);

+			else if(event.key.keysym.sym == SDLK_F12)

+				set_borderless(!borderless);

 			ksym = event.key.keysym.sym;

 			if(SDL_PeepEvents(&event, 1, SDL_PEEKEVENT, SDL_KEYUP, SDL_KEYUP) == 1 && ksym == event.key.keysym.sym)

 				return 1;