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/*
* Copyright © 2013 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include "present_priv.h"
#include "list.h"
static struct xorg_list fake_vblank_queue;
typedef struct present_fake_vblank {
struct xorg_list list;
uint64_t event_id;
OsTimerPtr timer;
ScreenPtr screen;
} present_fake_vblank_rec, *present_fake_vblank_ptr;
int
present_fake_get_ust_msc(ScreenPtr screen, uint64_t *ust, uint64_t *msc)
{
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
*ust = GetTimeInMicros();
*msc = (*ust + screen_priv->fake_interval / 2) / screen_priv->fake_interval;
return Success;
}
static void
present_fake_notify(ScreenPtr screen, uint64_t event_id)
{
uint64_t ust, msc;
present_fake_get_ust_msc(screen, &ust, &msc);
present_event_notify(event_id, ust, msc);
}
static CARD32
present_fake_do_timer(OsTimerPtr timer,
CARD32 time,
void *arg)
{
present_fake_vblank_ptr fake_vblank = arg;
present_fake_notify(fake_vblank->screen, fake_vblank->event_id);
xorg_list_del(&fake_vblank->list);
free(fake_vblank);
return 0;
}
void
present_fake_abort_vblank(ScreenPtr screen, uint64_t event_id, uint64_t msc)
{
present_fake_vblank_ptr fake_vblank, tmp;
xorg_list_for_each_entry_safe(fake_vblank, tmp, &fake_vblank_queue, list) {
if (fake_vblank->event_id == event_id) {
TimerCancel(fake_vblank->timer);
xorg_list_del(&fake_vblank->list);
free (fake_vblank);
break;
}
}
}
int
present_fake_queue_vblank(ScreenPtr screen,
uint64_t event_id,
uint64_t msc)
{
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
uint64_t ust = msc * screen_priv->fake_interval;
uint64_t now = GetTimeInMicros();
INT32 delay = ((int64_t) (ust - now)) / 1000;
present_fake_vblank_ptr fake_vblank;
if (delay <= 0) {
present_fake_notify(screen, event_id);
return Success;
}
fake_vblank = calloc (1, sizeof (present_fake_vblank_rec));
if (!fake_vblank)
return BadAlloc;
fake_vblank->screen = screen;
fake_vblank->event_id = event_id;
fake_vblank->timer = TimerSet(NULL, 0, delay, present_fake_do_timer, fake_vblank);
if (!fake_vblank->timer) {
free(fake_vblank);
return BadAlloc;
}
xorg_list_add(&fake_vblank->list, &fake_vblank_queue);
return Success;
}
void
present_fake_screen_init(ScreenPtr screen)
{
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
/* For screens with hardware vblank support, the fake code
* will be used for off-screen windows and while screens are blanked,
* in which case we want a slow interval here
*
* Otherwise, pretend that the screen runs at 60Hz
*/
if (screen_priv->info && screen_priv->info->get_crtc)
screen_priv->fake_interval = 1000000;
else
screen_priv->fake_interval = 16667;
}
void
present_fake_queue_init(void)
{
xorg_list_init(&fake_vblank_queue);
}
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