+static DisplayType select_display(const char *p)
+{
+ const char *opts;
+ DisplayType display = DT_DEFAULT;
+
+ if (strstart(p, "sdl", &opts)) {
+#ifdef CONFIG_SDL
+ display = DT_SDL;
+ while (*opts) {
+ const char *nextopt;
+
+ if (strstart(opts, ",frame=", &nextopt)) {
+ opts = nextopt;
+ if (strstart(opts, "on", &nextopt)) {
+ no_frame = 0;
+ } else if (strstart(opts, "off", &nextopt)) {
+ no_frame = 1;
+ } else {
+ goto invalid_sdl_args;
+ }
+ } else if (strstart(opts, ",alt_grab=", &nextopt)) {
+ opts = nextopt;
+ if (strstart(opts, "on", &nextopt)) {
+ alt_grab = 1;
+ } else if (strstart(opts, "off", &nextopt)) {
+ alt_grab = 0;
+ } else {
+ goto invalid_sdl_args;
+ }
+ } else if (strstart(opts, ",ctrl_grab=", &nextopt)) {
+ opts = nextopt;
+ if (strstart(opts, "on", &nextopt)) {
+ ctrl_grab = 1;
+ } else if (strstart(opts, "off", &nextopt)) {
+ ctrl_grab = 0;
+ } else {
+ goto invalid_sdl_args;
+ }
+ } else if (strstart(opts, ",window_close=", &nextopt)) {
+ opts = nextopt;
+ if (strstart(opts, "on", &nextopt)) {
+ no_quit = 0;
+ } else if (strstart(opts, "off", &nextopt)) {
+ no_quit = 1;
+ } else {
+ goto invalid_sdl_args;
+ }
+ } else {
+ invalid_sdl_args:
+ fprintf(stderr, "Invalid SDL option string: %s\n", p);
+ exit(1);
+ }
+ opts = nextopt;
+ }
+#else
+ fprintf(stderr, "SDL support is disabled\n");
+ exit(1);
+#endif
+ } else if (strstart(p, "vnc", &opts)) {
+#ifdef CONFIG_VNC
+ display_remote++;
+
+ if (*opts) {
+ const char *nextopt;
+
+ if (strstart(opts, "=", &nextopt)) {
+ vnc_display = nextopt;
+ }
+ }
+ if (!vnc_display) {
+ fprintf(stderr, "VNC requires a display argument vnc=<display>\n");
+ exit(1);
+ }
+#else
+ fprintf(stderr, "VNC support is disabled\n");
+ exit(1);
+#endif
+ } else if (strstart(p, "curses", &opts)) {
+#ifdef CONFIG_CURSES
+ display = DT_CURSES;
+#else
+ fprintf(stderr, "Curses support is disabled\n");
+ exit(1);
+#endif
+ } else if (strstart(p, "none", &opts)) {
+ display = DT_NONE;
+ } else {
+ fprintf(stderr, "Unknown display type: %s\n", p);
+ exit(1);
+ }
+
+ return display;
+}
+