Use scancodes instead of keycodes for locale independence.

ONLY US KEYBOARDS SUPPORTED! THAT'S HOW WE DO IT IN AMURRICA

src/sdl/i_video.c

@@ -278,8 +278,157 @@ static void SDLSetMode(INT32 width, INT32 height, SDL_bool fullscreen)
 	}
 }
 
+static INT32 Impl_SDL_Scancode_To_Keycode(SDL_Scancode code)
+{
+	if (code >= SDL_SCANCODE_A && code <= SDL_SCANCODE_Z)
+	{
+		// get lowercase ASCII
+		return code - SDL_SCANCODE_A + 'a';
+	}
+	if (code >= SDL_SCANCODE_1 && code <= SDL_SCANCODE_9)
+	{
+		return code - SDL_SCANCODE_1 + '1';
+	}
+	else if (code == SDL_SCANCODE_0)
+	{
+		return '0';
+	}
+	if (code >= SDL_SCANCODE_F1 && code <= SDL_SCANCODE_F12)
+	{
+		return KEY_F1 + (code - SDL_SCANCODE_F1);
+	}
+	switch (code)
+	{
+		case SDL_SCANCODE_KP_0:
+			return KEY_KEYPAD0;
+		case SDL_SCANCODE_KP_1:
+			return KEY_KEYPAD1;
+		case SDL_SCANCODE_KP_2:
+			return KEY_KEYPAD2;
+		case SDL_SCANCODE_KP_3:
+			return KEY_KEYPAD3;
+		case SDL_SCANCODE_KP_4:
+			return KEY_KEYPAD4;
+		case SDL_SCANCODE_KP_5:
+			return KEY_KEYPAD5;
+		case SDL_SCANCODE_KP_6:
+			return KEY_KEYPAD6;
+		case SDL_SCANCODE_KP_7:
+			return KEY_KEYPAD7;
+		case SDL_SCANCODE_KP_8:
+			return KEY_KEYPAD8;
+		case SDL_SCANCODE_KP_9:
+			return KEY_KEYPAD9;
+
+		case SDL_SCANCODE_RETURN:
+			return KEY_ENTER;
+		case SDL_SCANCODE_ESCAPE:
+			return KEY_ESCAPE;
+		case SDL_SCANCODE_BACKSPACE:
+			return KEY_BACKSPACE;
+		case SDL_SCANCODE_TAB:
+			return KEY_TAB;
+		case SDL_SCANCODE_SPACE:
+			return KEY_SPACE;
+		case SDL_SCANCODE_MINUS:
+			return KEY_MINUS;
+		case SDL_SCANCODE_EQUALS:
+			return KEY_EQUALS;
+		case SDL_SCANCODE_LEFTBRACKET:
+			return '[';
+		case SDL_SCANCODE_RIGHTBRACKET:
+			return ']';
+		case SDL_SCANCODE_BACKSLASH:
+			return '\\';
+		case SDL_SCANCODE_NONUSHASH:
+			return '#';
+		case SDL_SCANCODE_SEMICOLON:
+			return ';';
+		case SDL_SCANCODE_APOSTROPHE:
+			return '\'';
+		case SDL_SCANCODE_GRAVE:
+			return '`';
+		case SDL_SCANCODE_COMMA:
+			return ',';
+		case SDL_SCANCODE_PERIOD:
+			return '.';
+		case SDL_SCANCODE_SLASH:
+			return '/';
+		case SDL_SCANCODE_CAPSLOCK:
+			return KEY_CAPSLOCK;
+		case SDL_SCANCODE_PRINTSCREEN:
+			return 0; // undefined?
+		case SDL_SCANCODE_SCROLLLOCK:
+			return KEY_SCROLLLOCK;
+		case SDL_SCANCODE_PAUSE:
+			return KEY_PAUSE;
+		case SDL_SCANCODE_INSERT:
+			return KEY_INS;
+		case SDL_SCANCODE_HOME:
+			return KEY_HOME;
+		case SDL_SCANCODE_PAGEUP:
+			return KEY_PGUP;
+		case SDL_SCANCODE_DELETE:
+			return KEY_DEL;
+		case SDL_SCANCODE_END:
+			return KEY_END;
+		case SDL_SCANCODE_PAGEDOWN:
+			return KEY_PGDN;
+		case SDL_SCANCODE_RIGHT:
+			return KEY_RIGHTARROW;
+		case SDL_SCANCODE_LEFT:
+			return KEY_LEFTARROW;
+		case SDL_SCANCODE_DOWN:
+			return KEY_DOWNARROW;
+		case SDL_SCANCODE_UP:
+			return KEY_UPARROW;
+		case SDL_SCANCODE_NUMLOCKCLEAR:
+			return KEY_NUMLOCK;
+		case SDL_SCANCODE_KP_DIVIDE:
+			return KEY_KPADSLASH;
+		case SDL_SCANCODE_KP_MULTIPLY:
+			return '*'; // undefined?
+		case SDL_SCANCODE_KP_MINUS:
+			return KEY_MINUSPAD;
+		case SDL_SCANCODE_KP_PLUS:
+			return KEY_PLUSPAD;
+		case SDL_SCANCODE_KP_ENTER:
+			return KEY_ENTER;
+		case SDL_SCANCODE_KP_PERIOD:
+			return KEY_KPADDEL;
+		case SDL_SCANCODE_NONUSBACKSLASH:
+			return '\\';
+
+		case SDL_SCANCODE_LSHIFT:
+			return KEY_LSHIFT;
+		case SDL_SCANCODE_RSHIFT:
+			return KEY_RSHIFT;
+		case SDL_SCANCODE_LCTRL:
+			return KEY_LCTRL;
+		case SDL_SCANCODE_RCTRL:
+			return KEY_RCTRL;
+		case SDL_SCANCODE_LALT:
+			return KEY_LALT;
+		case SDL_SCANCODE_RALT:
+			return KEY_RALT;
+		case SDL_SCANCODE_LGUI:
+			return KEY_LEFTWIN;
+		case SDL_SCANCODE_RGUI:
+			return KEY_RIGHTWIN;
+		default:
+			break;
+	}
+	DBG_Printf("Unknown incoming scancode: %d, represented %c\n",
+				code,
+				SDL_GetKeyName(SDL_GetKeyFromScancode(code)));
+	return 0;
+}
+
 //
-//  Translates the SDL key into SRB2 key
+//  Translates the SDL scancode into SRB2 key
+//
+//  Deprecated: keycodes in SDL2 are not scancode based.
+//  They do not work with non-US keyboards anymore.
 //
 
 static INT32 SDLatekey(SDL_Keycode sym)
@@ -809,7 +958,7 @@ static void Impl_HandleKeyboardEvent(SDL_KeyboardEvent evt, Uint32 type)
 	{
 		return;
 	}
-	event.data1 = SDLatekey(evt.keysym.sym);
+	event.data1 = Impl_SDL_Scancode_To_Keycode(evt.keysym.scancode);
 	if (event.data1) D_PostEvent(&event);
 }