From cf1ecc82ab84dbfb4b6eea02c329bf9c2aa856ec Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Thu, 12 Mar 2015 12:51:13 +0100 Subject: console: delayed ui_info guest notification So we don't flood the guest with display change notifications while the user resizes the window. Signed-off-by: Gerd Hoffmann --- ui/console.c | 22 +++++++++++++++++++--- 1 file changed, 19 insertions(+), 3 deletions(-) (limited to 'ui/console.c') diff --git a/ui/console.c b/ui/console.c index f5295c4688..248dd605f1 100644 --- a/ui/console.c +++ b/ui/console.c @@ -126,6 +126,7 @@ struct QemuConsole { Object *device; uint32_t head; QemuUIInfo ui_info; + QEMUTimer *ui_timer; const GraphicHwOps *hw_ops; void *hw; @@ -1383,14 +1384,28 @@ void unregister_displaychangelistener(DisplayChangeListener *dcl) gui_setup_refresh(ds); } +static void dpy_set_ui_info_timer(void *opaque) +{ + QemuConsole *con = opaque; + + con->hw_ops->ui_info(con->hw, con->head, &con->ui_info); +} + int dpy_set_ui_info(QemuConsole *con, QemuUIInfo *info) { assert(con != NULL); con->ui_info = *info; - if (con->hw_ops->ui_info) { - return con->hw_ops->ui_info(con->hw, con->head, info); + if (!con->hw_ops->ui_info) { + return -1; } - return -1; + + /* + * Typically we get a flood of these as the user resizes the window. + * Wait until the dust has settled (one second without updates), then + * go notify the guest. + */ + timer_mod(con->ui_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + 1000); + return 0; } void dpy_gfx_update(QemuConsole *con, int x, int y, int w, int h) @@ -1724,6 +1739,7 @@ QemuConsole *graphic_console_init(DeviceState *dev, uint32_t head, ds = get_alloc_displaystate(); trace_console_gfx_new(); s = new_console(ds, GRAPHIC_CONSOLE, head); + s->ui_timer = timer_new_ms(QEMU_CLOCK_REALTIME, dpy_set_ui_info_timer, s); graphic_console_set_hwops(s, hw_ops, opaque); if (dev) { object_property_set_link(OBJECT(s), OBJECT(dev), "device", -- cgit v1.2.3