We already print availabled devices with "-device help", or available
backends with "-netdev help" or "-chardev help". Let's provide a way
for the users to query the available display backends, too.
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-id:
20200108144702.29969-1-thuth@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
bool qemu_display_find_default(DisplayOptions *opts);
void qemu_display_early_init(DisplayOptions *opts);
void qemu_display_init(DisplayState *ds, DisplayOptions *opts);
+void qemu_display_help(void);
/* vnc.c */
void vnc_display_init(const char *id, Error **errp);
@item -display @var{type}
@findex -display
Select type of display to use. This option is a replacement for the
-old style -sdl/-curses/... options. Valid values for @var{type} are
+old style -sdl/-curses/... options. Use @code{-display help} to list
+the available display types. Valid values for @var{type} are
@table @option
@item sdl
Display video output via SDL (usually in a separate graphics
dpys[opts->type]->init(ds, opts);
}
+void qemu_display_help(void)
+{
+ int idx;
+
+ printf("Available display backend types:\n");
+ for (idx = DISPLAY_TYPE_NONE; idx < DISPLAY_TYPE__MAX; idx++) {
+ if (!dpys[idx]) {
+ ui_module_load_one(DisplayType_str(idx));
+ }
+ if (dpys[idx]) {
+ printf("%s\n", DisplayType_str(dpys[idx]->type));
+ }
+ }
+}
+
void qemu_chr_parse_vc(QemuOpts *opts, ChardevBackend *backend, Error **errp)
{
int val;
{
const char *opts;
+ if (is_help_option(p)) {
+ qemu_display_help();
+ exit(0);
+ }
+
if (strstart(p, "sdl", &opts)) {
/*
* sdl DisplayType needs hand-crafted parser instead of