Commit c388f408 authored by Thomas Huth's avatar Thomas Huth Committed by Gerd Hoffmann
Browse files

ui: Print available display backends with '-display help' 



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: default avatarPhilippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: default avatarPhilippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: default avatarThomas Huth <thuth@redhat.com>
Message-id: 20200108144702.29969-1-thuth@redhat.com
Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
parent 3c8a6575

include/ui/console.h

+1 −0
Original line number Diff line number Diff line
@@ -442,6 +442,7 @@ void qemu_display_register(QemuDisplay *ui); 
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);

qemu-options.hx

+2 −1
Original line number Diff line number Diff line
@@ -1669,7 +1669,8 @@ STEXI 
@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

ui/console.c

+15 −0
Original line number Diff line number Diff line
@@ -2333,6 +2333,21 @@ void qemu_display_init(DisplayState *ds, DisplayOptions *opts) 
    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;

vl.c

+5 −0
Original line number Diff line number Diff line
@@ -1869,6 +1869,11 @@ static void parse_display(const char *p) 
{

    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