| 1 | /* |
| 2 | * Copyright © 2013 Keith Packard |
| 3 | * |
| 4 | * Permission to use, copy, modify, distribute, and sell this software and its |
| 5 | * documentation for any purpose is hereby granted without fee, provided that |
| 6 | * the above copyright notice appear in all copies and that both that copyright |
| 7 | * notice and this permission notice appear in supporting documentation, and |
| 8 | * that the name of the copyright holders not be used in advertising or |
| 9 | * publicity pertaining to distribution of the software without specific, |
| 10 | * written prior permission. The copyright holders make no representations |
| 11 | * about the suitability of this software for any purpose. It is provided "as |
| 12 | * is" without express or implied warranty. |
| 13 | * |
| 14 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
| 15 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO |
| 16 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
| 17 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, |
| 18 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 19 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
| 20 | * OF THIS SOFTWARE. |
| 21 | */ |
| 22 | |
| 23 | #ifdef HAVE_XORG_CONFIG_H |
| 24 | #include <xorg-config.h> |
| 25 | #endif |
| 26 | |
| 27 | #include "present_priv.h" |
| 28 | #include "list.h" |
| 29 | |
| 30 | static struct xorg_list fake_vblank_queue; |
| 31 | |
| 32 | typedef struct present_fake_vblank { |
| 33 | struct xorg_list list; |
| 34 | uint64_t event_id; |
| 35 | OsTimerPtr timer; |
| 36 | ScreenPtr screen; |
| 37 | } present_fake_vblank_rec, *present_fake_vblank_ptr; |
| 38 | |
| 39 | int |
| 40 | present_fake_get_ust_msc(ScreenPtr screen, uint64_t *ust, uint64_t *msc) |
| 41 | { |
| 42 | present_screen_priv_ptr screen_priv = present_screen_priv(screen); |
| 43 | |
| 44 | *ust = GetTimeInMicros(); |
| 45 | *msc = (*ust + screen_priv->fake_interval / 2) / screen_priv->fake_interval; |
| 46 | return Success; |
| 47 | } |
| 48 | |
| 49 | static void |
| 50 | present_fake_notify(ScreenPtr screen, uint64_t event_id) |
| 51 | { |
| 52 | uint64_t ust, msc; |
| 53 | |
| 54 | present_fake_get_ust_msc(screen, &ust, &msc); |
| 55 | present_event_notify(event_id, ust, msc); |
| 56 | } |
| 57 | |
| 58 | static CARD32 |
| 59 | present_fake_do_timer(OsTimerPtr timer, |
| 60 | CARD32 time, |
| 61 | pointer arg) |
| 62 | { |
| 63 | present_fake_vblank_ptr fake_vblank = arg; |
| 64 | |
| 65 | present_fake_notify(fake_vblank->screen, fake_vblank->event_id); |
| 66 | xorg_list_del(&fake_vblank->list); |
| 67 | free(fake_vblank); |
| 68 | return 0; |
| 69 | } |
| 70 | |
| 71 | void |
| 72 | present_fake_abort_vblank(ScreenPtr screen, uint64_t event_id, uint64_t msc) |
| 73 | { |
| 74 | present_fake_vblank_ptr fake_vblank, tmp; |
| 75 | |
| 76 | xorg_list_for_each_entry_safe(fake_vblank, tmp, &fake_vblank_queue, list) { |
| 77 | if (fake_vblank->event_id == event_id) { |
| 78 | TimerCancel(fake_vblank->timer); |
| 79 | xorg_list_del(&fake_vblank->list); |
| 80 | free (fake_vblank); |
| 81 | break; |
| 82 | } |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | int |
| 87 | present_fake_queue_vblank(ScreenPtr screen, |
| 88 | uint64_t event_id, |
| 89 | uint64_t msc) |
| 90 | { |
| 91 | present_screen_priv_ptr screen_priv = present_screen_priv(screen); |
| 92 | uint64_t ust = msc * screen_priv->fake_interval; |
| 93 | uint64_t now = GetTimeInMicros(); |
| 94 | INT32 delay = ((int64_t) (ust - now)) / 1000; |
| 95 | present_fake_vblank_ptr fake_vblank; |
| 96 | |
| 97 | if (delay <= 0) { |
| 98 | present_fake_notify(screen, event_id); |
| 99 | return Success; |
| 100 | } |
| 101 | |
| 102 | fake_vblank = calloc (1, sizeof (present_fake_vblank_rec)); |
| 103 | if (!fake_vblank) |
| 104 | return BadAlloc; |
| 105 | |
| 106 | fake_vblank->screen = screen; |
| 107 | fake_vblank->event_id = event_id; |
| 108 | fake_vblank->timer = TimerSet(NULL, 0, delay, present_fake_do_timer, fake_vblank); |
| 109 | if (!fake_vblank->timer) { |
| 110 | free(fake_vblank); |
| 111 | return BadAlloc; |
| 112 | } |
| 113 | |
| 114 | xorg_list_add(&fake_vblank->list, &fake_vblank_queue); |
| 115 | |
| 116 | return Success; |
| 117 | } |
| 118 | |
| 119 | void |
| 120 | present_fake_screen_init(ScreenPtr screen) |
| 121 | { |
| 122 | present_screen_priv_ptr screen_priv = present_screen_priv(screen); |
| 123 | |
| 124 | /* For screens with hardware vblank support, the fake code |
| 125 | * will be used for off-screen windows and while screens are blanked, |
| 126 | * in which case we want a slow interval here |
| 127 | * |
| 128 | * Otherwise, pretend that the screen runs at 60Hz |
| 129 | */ |
| 130 | if (screen_priv->info && screen_priv->info->get_crtc) |
| 131 | screen_priv->fake_interval = 1000000; |
| 132 | else |
| 133 | screen_priv->fake_interval = 16667; |
| 134 | } |
| 135 | |
| 136 | void |
| 137 | present_fake_queue_init(void) |
| 138 | { |
| 139 | xorg_list_init(&fake_vblank_queue); |
| 140 | } |