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