/*
* Periodic update of display.
* Also transmit the refresh interval to the frontend.
*
* Never ever do any qemu display operations
* (resize, screen update) outside this function.
* Our screen might be inactive. When asked for
* an update we know it is active.
*/
static void xenfb_update(void *opaque)
{
struct XenFB *xenfb = opaque;
DisplaySurface *surface;
int i;
if (xenfb->c.xendev.be_state != XenbusStateConnected)
return;
if (!xenfb->feature_update) {
/* we don't get update notifications, thus use the
* sledge hammer approach ... */
xenfb->up_fullscreen = 1;
}
/* resize if needed */
if (xenfb->do_resize) {
pixman_format_code_t format;
xenfb->do_resize = 0;
switch (xenfb->depth) {
case 16:
case 32:
/* console.c supported depth -> buffer can be used directly */
format = qemu_default_pixman_format(xenfb->depth, true);
surface = qemu_create_displaysurface_from
(xenfb->width, xenfb->height, format,
xenfb->row_stride, xenfb->pixels + xenfb->offset);
break;
default:
/* we must convert stuff */
surface = qemu_create_displaysurface(xenfb->width, xenfb->height);
break;
}
dpy_gfx_replace_surface(xenfb->c.con, surface);
xen_be_printf(&xenfb->c.xendev, 1, "update: resizing: %dx%d @ %d bpp%s\n",
xenfb->width, xenfb->height, xenfb->depth,
is_buffer_shared(surface) ? " (shared)" : "");
xenfb->up_fullscreen = 1;
}
/* run queued updates */
if (xenfb->up_fullscreen) {
xen_be_printf(&xenfb->c.xendev, 3, "update: fullscreen\n");
xenfb_guest_copy(xenfb, 0, 0, xenfb->width, xenfb->height);
} else if (xenfb->up_count) {
xen_be_printf(&xenfb->c.xendev, 3, "update: %d rects\n", xenfb->up_count);
for (i = 0; i < xenfb->up_count; i++)
xenfb_guest_copy(xenfb,
xenfb->up_rects[i].x,
xenfb->up_rects[i].y,
xenfb->up_rects[i].w,
xenfb->up_rects[i].h);
} else {
xen_be_printf(&xenfb->c.xendev, 3, "update: nothing\n");
}
xenfb->up_count = 0;
xenfb->up_fullscreen = 0;
}
static void xenfb_on_fb_event(struct xenfb *xenfb)
{
uint32_t prod, cons;
struct xenfb_page *page = xenfb->fb.page;
prod = page->out_prod;
if (prod == page->out_cons)
return;
xen_rmb(); /* ensure we see ring contents up to prod */
for (cons = page->out_cons; cons != prod; cons++) {
union xenfb_out_event *event = &XENFB_OUT_RING_REF(page, cons);
int x, y, w, h;
switch (event->type) {
case XENFB_TYPE_UPDATE:
x = MAX(event->update.x, 0);
y = MAX(event->update.y, 0);
w = MIN(event->update.width, xenfb->width - x);
h = MIN(event->update.height, xenfb->height - y);
if (w < 0 || h < 0) {
fprintf(stderr, "%s bogus update ignored\n",
xenfb->fb.nodename);
break;
}
if (x != event->update.x || y != event->update.y
|| w != event->update.width
|| h != event->update.height) {
fprintf(stderr, "%s bogus update clipped\n",
xenfb->fb.nodename);
}
xenfb_guest_copy(xenfb, x, y, w, h);
break;
case XENFB_TYPE_RESIZE:
if (xenfb_configure_fb(xenfb, xenfb->fb_len,
event->resize.width,
event->resize.height,
event->resize.depth,
xenfb->fb_len,
event->resize.offset,
event->resize.stride) < 0)
break;
if (xenfb->ds->dpy_resize_shared)
dpy_resize_shared(xenfb->ds, xenfb->width, xenfb->height, xenfb->depth, xenfb->row_stride, xenfb->pixels + xenfb->offset);
else
dpy_resize(xenfb->ds, xenfb->width, xenfb->height);
xenfb_invalidate(xenfb);
break;
}
}
xen_mb(); /* ensure we're done with ring contents */
page->out_cons = cons;
xc_evtchn_notify(xenfb->evt_xch, xenfb->fb.port);
}
static void xenfb_on_fb_event(struct xenfb *xenfb)
{
uint32_t prod, cons;
struct xenfb_page *page = xenfb->fb.page;
prod = page->out_prod;
if (prod == page->out_cons)
return;
rmb(); /* ensure we see ring contents up to prod */
for (cons = page->out_cons; cons != prod; cons++) {
union xenfb_out_event *event = &XENFB_OUT_RING_REF(page, cons);
int x, y, w, h;
switch (event->type) {
case XENFB_TYPE_UPDATE:
x = MAX(event->update.x, 0);
y = MAX(event->update.y, 0);
w = MIN(event->update.width, xenfb->width - x);
h = MIN(event->update.height, xenfb->height - y);
if (w < 0 || h < 0) {
fprintf(stderr, "%s bogus update ignored\n",
xenfb->fb.nodename);
break;
}
if (x != event->update.x || y != event->update.y
|| w != event->update.width
|| h != event->update.height) {
fprintf(stderr, "%s bogus update clipped\n",
xenfb->fb.nodename);
break;
}
xenfb_guest_copy(xenfb, x, y, w, h);
break;
}
}
mb(); /* ensure we're done with ring contents */
page->out_cons = cons;
xc_evtchn_notify(xenfb->evt_xch, xenfb->fb.port);
}
/*
* Periodic update of display.
* Also transmit the refresh interval to the frontend.
*
* Never ever do any qemu display operations
* (resize, screen update) outside this function.
* Our screen might be inactive. When asked for
* an update we know it is active.
*/
static void xenfb_update(void *opaque)
{
struct XenFB *xenfb = opaque;
struct DisplayChangeListener *l;
int i;
if (xenfb->c.xendev.be_state != XenbusStateConnected)
return;
if (xenfb->feature_update) {
#ifdef XENFB_TYPE_REFRESH_PERIOD
int period = 99999999;
int idle = 1;
if (xenfb_queue_full(xenfb))
return;
for (l = xenfb->c.ds->listeners; l != NULL; l = l->next) {
if (l->idle)
continue;
idle = 0;
if (!l->gui_timer_interval) {
if (period > GUI_REFRESH_INTERVAL)
period = GUI_REFRESH_INTERVAL;
} else {
if (period > l->gui_timer_interval)
period = l->gui_timer_interval;
}
}
if (idle)
period = XENFB_NO_REFRESH;
if (xenfb->refresh_period != period) {
xenfb_send_refresh_period(xenfb, period);
xenfb->refresh_period = period;
xen_be_printf(&xenfb->c.xendev, 1, "refresh period: %d\n", period);
}
#else
; /* nothing */
#endif
} else {
/* we don't get update notifications, thus use the
* sledge hammer approach ... */
xenfb->up_fullscreen = 1;
}
/* resize if needed */
if (xenfb->do_resize) {
xenfb->do_resize = 0;
switch (xenfb->depth) {
case 16:
case 32:
/* console.c supported depth -> buffer can be used directly */
qemu_free_displaysurface(xenfb->c.ds);
xenfb->c.ds->surface = qemu_create_displaysurface_from
(xenfb->width, xenfb->height, xenfb->depth,
xenfb->row_stride, xenfb->pixels + xenfb->offset);
break;
default:
/* we must convert stuff */
qemu_resize_displaysurface(xenfb->c.ds, xenfb->width, xenfb->height);
break;
}
xen_be_printf(&xenfb->c.xendev, 1, "update: resizing: %dx%d @ %d bpp%s\n",
xenfb->width, xenfb->height, xenfb->depth,
is_buffer_shared(xenfb->c.ds->surface) ? " (shared)" : "");
dpy_resize(xenfb->c.ds);
xenfb->up_fullscreen = 1;
}
/* run queued updates */
if (xenfb->up_fullscreen) {
xen_be_printf(&xenfb->c.xendev, 3, "update: fullscreen\n");
xenfb_guest_copy(xenfb, 0, 0, xenfb->width, xenfb->height);
} else if (xenfb->up_count) {
xen_be_printf(&xenfb->c.xendev, 3, "update: %d rects\n", xenfb->up_count);
for (i = 0; i < xenfb->up_count; i++)
xenfb_guest_copy(xenfb,
xenfb->up_rects[i].x,
xenfb->up_rects[i].y,
xenfb->up_rects[i].w,
xenfb->up_rects[i].h);
} else {
xen_be_printf(&xenfb->c.xendev, 3, "update: nothing\n");
}
xenfb->up_count = 0;
xenfb->up_fullscreen = 0;
}
/* QEMU display state changed, so refresh the framebuffer copy */
static void xenfb_invalidate(void *opaque)
{
struct xenfb *xenfb = opaque;
xenfb_guest_copy(xenfb, 0, 0, xenfb->width, xenfb->height);
}
