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xserver/present/present_scmd.c

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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.
*/
#include "present_priv.h"
#include <misync.h>
#include <misyncstr.h>
#ifdef MONOTONIC_CLOCK
#include <time.h>
#endif
/*
* Screen flip mode
*
* Provides the default mode for drivers, that do not
* support flips and the full screen flip mode.
*
*/
static uint64_t present_event_id;
static struct xorg_list present_exec_queue;
static struct xorg_list present_flip_queue;
static void
present_execute(present_vblank_ptr vblank, uint64_t ust, uint64_t crtc_msc);
static void
present_scmd_create_event_id(present_window_priv_ptr window_priv,
present_vblank_ptr vblank)
{
vblank->event_id = ++present_event_id;
}
static inline PixmapPtr
present_flip_pending_pixmap(ScreenPtr screen)
{
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
if (!screen_priv)
return NULL;
if (!screen_priv->flip_pending)
return NULL;
return screen_priv->flip_pending->pixmap;
}
static Bool
present_check_flip(RRCrtcPtr crtc,
WindowPtr window,
PixmapPtr pixmap,
Bool sync_flip,
RegionPtr valid,
int16_t x_off,
int16_t y_off,
PresentFlipReason *reason)
{
ScreenPtr screen = window->drawable.pScreen;
PixmapPtr window_pixmap;
WindowPtr root = screen->root;
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
if (reason)
*reason = PRESENT_FLIP_REASON_UNKNOWN;
if (!screen_priv)
return FALSE;
if (!screen_priv->info)
return FALSE;
if (!crtc)
return FALSE;
/* Check to see if the driver supports flips at all */
if (!screen_priv->info->flip)
return FALSE;
/* Make sure the window hasn't been redirected with Composite */
window_pixmap = screen->GetWindowPixmap(window);
if (window_pixmap != screen->GetScreenPixmap(screen) &&
window_pixmap != screen_priv->flip_pixmap &&
window_pixmap != present_flip_pending_pixmap(screen))
return FALSE;
/* Check for full-screen window */
if (!RegionEqual(&window->clipList, &root->winSize)) {
return FALSE;
}
/* Source pixmap must align with window exactly */
if (x_off || y_off) {
return FALSE;
}
/* Make sure the area marked as valid fills the screen */
if (valid && !RegionEqual(valid, &root->winSize)) {
return FALSE;
}
/* Does the window match the pixmap exactly? */
if (window->drawable.x != 0 || window->drawable.y != 0 ||
#ifdef COMPOSITE
window->drawable.x != pixmap->screen_x || window->drawable.y != pixmap->screen_y ||
#endif
window->drawable.width != pixmap->drawable.width ||
window->drawable.height != pixmap->drawable.height) {
return FALSE;
}
/* Ask the driver for permission */
if (screen_priv->info->version >= 1 && screen_priv->info->check_flip2) {
if (!(*screen_priv->info->check_flip2) (crtc, window, pixmap, sync_flip, reason)) {
DebugPresent(("\td %08" PRIx32 " -> %08" PRIx32 "\n", window->drawable.id, pixmap ? pixmap->drawable.id : 0));
return FALSE;
}
} else if (screen_priv->info->check_flip) {
if (!(*screen_priv->info->check_flip) (crtc, window, pixmap, sync_flip)) {
DebugPresent(("\td %08" PRIx32 " -> %08" PRIx32 "\n", window->drawable.id, pixmap ? pixmap->drawable.id : 0));
return FALSE;
}
}
return TRUE;
}
static Bool
present_flip(RRCrtcPtr crtc,
uint64_t event_id,
uint64_t target_msc,
PixmapPtr pixmap,
Bool sync_flip)
{
ScreenPtr screen = crtc->pScreen;
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
return (*screen_priv->info->flip) (crtc, event_id, target_msc, pixmap, sync_flip);
}
static RRCrtcPtr
present_scmd_get_crtc(present_screen_priv_ptr screen_priv, WindowPtr window)
{
if (!screen_priv->info)
return NULL;
return (*screen_priv->info->get_crtc)(window);
}
static uint32_t
present_scmd_query_capabilities(present_screen_priv_ptr screen_priv)
{
if (!screen_priv->info)
return 0;
return screen_priv->info->capabilities;
}
static int
present_get_ust_msc(ScreenPtr screen, RRCrtcPtr crtc, uint64_t *ust, uint64_t *msc)
{
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
if (crtc == NULL)
return present_fake_get_ust_msc(screen, ust, msc);
else
return (*screen_priv->info->get_ust_msc)(crtc, ust, msc);
}
static void
present_flush(WindowPtr window)
{
ScreenPtr screen = window->drawable.pScreen;
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
if (!screen_priv)
return;
if (!screen_priv->info)
return;
(*screen_priv->info->flush) (window);
}
static int
present_queue_vblank(ScreenPtr screen,
WindowPtr window,
RRCrtcPtr crtc,
uint64_t event_id,
uint64_t msc)
{
Bool ret;
if (crtc == NULL)
ret = present_fake_queue_vblank(screen, event_id, msc);
else
{
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
ret = (*screen_priv->info->queue_vblank) (crtc, event_id, msc);
}
return ret;
}
/*
* When the wait fence or previous flip is completed, it's time
* to re-try the request
*/
static void
present_re_execute(present_vblank_ptr vblank)
{
uint64_t ust = 0, crtc_msc = 0;
if (vblank->crtc)
(void) present_get_ust_msc(vblank->screen, vblank->crtc, &ust, &crtc_msc);
present_execute(vblank, ust, crtc_msc);
}
static void
present_flip_try_ready(ScreenPtr screen)
{
present_vblank_ptr vblank;
xorg_list_for_each_entry(vblank, &present_flip_queue, event_queue) {
if (vblank->queued) {
present_re_execute(vblank);
return;
}
}
}
static void
present_flip_idle(ScreenPtr screen)
{
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
if (screen_priv->flip_pixmap) {
present_pixmap_idle(screen_priv->flip_pixmap, screen_priv->flip_window,
screen_priv->flip_serial, screen_priv->flip_idle_fence);
if (screen_priv->flip_idle_fence)
present_fence_destroy(screen_priv->flip_idle_fence);
dixDestroyPixmap(screen_priv->flip_pixmap, screen_priv->flip_pixmap->drawable.id);
screen_priv->flip_crtc = NULL;
screen_priv->flip_window = NULL;
screen_priv->flip_serial = 0;
screen_priv->flip_pixmap = NULL;
screen_priv->flip_idle_fence = NULL;
}
}
void
present_restore_screen_pixmap(ScreenPtr screen)
{
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
PixmapPtr screen_pixmap = (*screen->GetScreenPixmap)(screen);
PixmapPtr flip_pixmap;
WindowPtr flip_window;
if (screen_priv->flip_pending) {
flip_window = screen_priv->flip_pending->window;
flip_pixmap = screen_priv->flip_pending->pixmap;
} else {
flip_window = screen_priv->flip_window;
flip_pixmap = screen_priv->flip_pixmap;
}
assert (flip_pixmap);
/* Update the screen pixmap with the current flip pixmap contents
* Only do this the first time for a particular unflip operation, or
* we'll probably scribble over other windows
*/
if (screen->root && screen->GetWindowPixmap(screen->root) == flip_pixmap)
present_copy_region(&screen_pixmap->drawable, flip_pixmap, NULL, 0, 0);
/* Switch back to using the screen pixmap now to avoid
* 2D applications drawing to the wrong pixmap.
*/
if (flip_window)
present_set_tree_pixmap(flip_window, flip_pixmap, screen_pixmap);
if (screen->root)
present_set_tree_pixmap(screen->root, NULL, screen_pixmap);
}
void
present_set_abort_flip(ScreenPtr screen)
{
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
if (!screen_priv->flip_pending->abort_flip) {
present_restore_screen_pixmap(screen);
screen_priv->flip_pending->abort_flip = TRUE;
}
}
static void
present_unflip(ScreenPtr screen)
{
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
assert (!screen_priv->unflip_event_id);
assert (!screen_priv->flip_pending);
present_restore_screen_pixmap(screen);
screen_priv->unflip_event_id = ++present_event_id;
DebugPresent(("u %" PRIu64 "\n", screen_priv->unflip_event_id));
(*screen_priv->info->unflip) (screen, screen_priv->unflip_event_id);
}
static void
present_flip_notify(present_vblank_ptr vblank, uint64_t ust, uint64_t crtc_msc)
{
ScreenPtr screen = vblank->screen;
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
DebugPresent(("\tn %" PRIu64 " %p %" PRIu64 " %" PRIu64 ": %08" PRIx32 " -> %08" PRIx32 "\n",
vblank->event_id, vblank, vblank->exec_msc, vblank->target_msc,
vblank->pixmap ? vblank->pixmap->drawable.id : 0,
vblank->window ? vblank->window->drawable.id : 0));
assert (vblank == screen_priv->flip_pending);
present_flip_idle(screen);
xorg_list_del(&vblank->event_queue);
/* Transfer reference for pixmap and fence from vblank to screen_priv */
screen_priv->flip_crtc = vblank->crtc;
screen_priv->flip_window = vblank->window;
screen_priv->flip_serial = vblank->serial;
screen_priv->flip_pixmap = vblank->pixmap;
screen_priv->flip_sync = vblank->sync_flip;
screen_priv->flip_idle_fence = vblank->idle_fence;
vblank->pixmap = NULL;
vblank->idle_fence = NULL;
screen_priv->flip_pending = NULL;
if (vblank->abort_flip)
present_unflip(screen);
present_vblank_notify(vblank, PresentCompleteKindPixmap, PresentCompleteModeFlip, ust, crtc_msc);
present_vblank_destroy(vblank);
present_flip_try_ready(screen);
}
void
present_event_notify(uint64_t event_id, uint64_t ust, uint64_t msc)
{
present_vblank_ptr vblank;
int s;
if (!event_id)
return;
DebugPresent(("\te %" PRIu64 " ust %" PRIu64 " msc %" PRIu64 "\n", event_id, ust, msc));
xorg_list_for_each_entry(vblank, &present_exec_queue, event_queue) {
int64_t match = event_id - vblank->event_id;
if (match == 0) {
present_execute(vblank, ust, msc);
return;
}
}
xorg_list_for_each_entry(vblank, &present_flip_queue, event_queue) {
if (vblank->event_id == event_id) {
if (vblank->queued)
present_execute(vblank, ust, msc);
else
present_flip_notify(vblank, ust, msc);
return;
}
}
for (s = 0; s < screenInfo.numScreens; s++) {
ScreenPtr screen = screenInfo.screens[s];
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
if (event_id == screen_priv->unflip_event_id) {
DebugPresent(("\tun %" PRIu64 "\n", event_id));
screen_priv->unflip_event_id = 0;
present_flip_idle(screen);
present_flip_try_ready(screen);
return;
}
}
}
/*
* 'window' is being reconfigured. Check to see if it is involved
* in flipping and clean up as necessary
*/
static void
present_check_flip_window (WindowPtr window)
{
ScreenPtr screen = window->drawable.pScreen;
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
present_window_priv_ptr window_priv = present_window_priv(window);
present_vblank_ptr flip_pending = screen_priv->flip_pending;
present_vblank_ptr vblank;
PresentFlipReason reason;
/* If this window hasn't ever been used with Present, it can't be
* flipping
*/
if (!window_priv)
return;
if (screen_priv->unflip_event_id)
return;
if (flip_pending) {
/*
* Check pending flip
*/
if (flip_pending->window == window) {
if (!present_check_flip(flip_pending->crtc, window, flip_pending->pixmap,
flip_pending->sync_flip, NULL, 0, 0, NULL))
present_set_abort_flip(screen);
}
} else {
/*
* Check current flip
*/
if (window == screen_priv->flip_window) {
if (!present_check_flip(screen_priv->flip_crtc, window, screen_priv->flip_pixmap, screen_priv->flip_sync, NULL, 0, 0, NULL))
present_unflip(screen);
}
}
/* Now check any queued vblanks */
xorg_list_for_each_entry(vblank, &window_priv->vblank, window_list) {
if (vblank->queued && vblank->flip && !present_check_flip(vblank->crtc, window, vblank->pixmap, vblank->sync_flip, NULL, 0, 0, &reason)) {
vblank->flip = FALSE;
vblank->reason = reason;
if (vblank->sync_flip)
vblank->exec_msc = vblank->target_msc;
}
}
}
static Bool
present_scmd_can_window_flip(WindowPtr window)
{
ScreenPtr screen = window->drawable.pScreen;
PixmapPtr window_pixmap;
WindowPtr root = screen->root;
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
if (!screen_priv)
return FALSE;
if (!screen_priv->info)
return FALSE;
/* Check to see if the driver supports flips at all */
if (!screen_priv->info->flip)
return FALSE;
/* Make sure the window hasn't been redirected with Composite */
window_pixmap = screen->GetWindowPixmap(window);
if (window_pixmap != screen->GetScreenPixmap(screen) &&
window_pixmap != screen_priv->flip_pixmap &&
window_pixmap != present_flip_pending_pixmap(screen))
return FALSE;
/* Check for full-screen window */
if (!RegionEqual(&window->clipList, &root->winSize)) {
return FALSE;
}
/* Does the window match the pixmap exactly? */
if (window->drawable.x != 0 || window->drawable.y != 0) {
return FALSE;
}
return TRUE;
}
/*
* Once the required MSC has been reached, execute the pending request.
*
* For requests to actually present something, either blt contents to
* the screen or queue a frame buffer swap.
*
* For requests to just get the current MSC/UST combo, skip that part and
* go straight to event delivery
*/
static void
present_execute(present_vblank_ptr vblank, uint64_t ust, uint64_t crtc_msc)
{
WindowPtr window = vblank->window;
ScreenPtr screen = window->drawable.pScreen;
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
if (present_execute_wait(vblank, crtc_msc))
return;
if (vblank->flip && vblank->pixmap && vblank->window) {
if (screen_priv->flip_pending || screen_priv->unflip_event_id) {
DebugPresent(("\tr %" PRIu64 " %p (pending %p unflip %" PRIu64 ")\n",
vblank->event_id, vblank,
screen_priv->flip_pending, screen_priv->unflip_event_id));
xorg_list_del(&vblank->event_queue);
xorg_list_append(&vblank->event_queue, &present_flip_queue);
vblank->flip_ready = TRUE;
return;
}
}
xorg_list_del(&vblank->event_queue);
xorg_list_del(&vblank->window_list);
vblank->queued = FALSE;
if (vblank->pixmap && vblank->window) {
if (vblank->flip) {
DebugPresent(("\tf %" PRIu64 " %p %" PRIu64 ": %08" PRIx32 " -> %08" PRIx32 "\n",
vblank->event_id, vblank, crtc_msc,
vblank->pixmap->drawable.id, vblank->window->drawable.id));
/* Prepare to flip by placing it in the flip queue and
* and sticking it into the flip_pending field
*/
screen_priv->flip_pending = vblank;
xorg_list_add(&vblank->event_queue, &present_flip_queue);
/* Try to flip
*/
if (present_flip(vblank->crtc, vblank->event_id, vblank->target_msc, vblank->pixmap, vblank->sync_flip)) {
RegionPtr damage;
/* Fix window pixmaps:
* 1) Restore previous flip window pixmap
* 2) Set current flip window pixmap to the new pixmap
*/
if (screen_priv->flip_window && screen_priv->flip_window != window)
present_set_tree_pixmap(screen_priv->flip_window,
screen_priv->flip_pixmap,
(*screen->GetScreenPixmap)(screen));
present_set_tree_pixmap(vblank->window, NULL, vblank->pixmap);
present_set_tree_pixmap(screen->root, NULL, vblank->pixmap);
/* Report update region as damaged
*/
if (vblank->update) {
damage = vblank->update;
RegionIntersect(damage, damage, &window->clipList);
} else
damage = &window->clipList;
DamageDamageRegion(&vblank->window->drawable, damage);
return;
}
xorg_list_del(&vblank->event_queue);
/* Oops, flip failed. Clear the flip_pending field
*/
screen_priv->flip_pending = NULL;
vblank->flip = FALSE;
vblank->exec_msc = vblank->target_msc;
}
DebugPresent(("\tc %p %" PRIu64 ": %08" PRIx32 " -> %08" PRIx32 "\n",
vblank, crtc_msc, vblank->pixmap->drawable.id, vblank->window->drawable.id));
if (screen_priv->flip_pending) {
/* Check pending flip
*/
if (window == screen_priv->flip_pending->window)
present_set_abort_flip(screen);
} else if (!screen_priv->unflip_event_id) {
/* Check current flip
*/
if (window == screen_priv->flip_window)
present_unflip(screen);
}
present_execute_copy(vblank, crtc_msc);
if (vblank->queued) {
xorg_list_add(&vblank->event_queue, &present_exec_queue);
xorg_list_append(&vblank->window_list,
&present_get_window_priv(window, TRUE)->vblank);
return;
}
}
present_execute_post(vblank, ust, crtc_msc);
}
static void
present_scmd_update_window_crtc(WindowPtr window, RRCrtcPtr crtc, uint64_t new_msc)
{
present_window_priv_ptr window_priv = present_get_window_priv(window, TRUE);
uint64_t old_ust, old_msc;
/* Crtc unchanged, no offset. */
if (crtc == window_priv->crtc)
return;
/* No crtc earlier to offset against, just set the crtc. */
if (window_priv->crtc == PresentCrtcNeverSet) {
window_priv->crtc = crtc;
return;
}
/* Crtc may have been turned off, just use whatever previous MSC we'd seen from this CRTC. */
if (present_get_ust_msc(window->drawable.pScreen, window_priv->crtc, &old_ust, &old_msc) != Success)
old_msc = window_priv->msc;
window_priv->msc_offset += new_msc - old_msc;
window_priv->crtc = crtc;
}
static int
present_scmd_pixmap(WindowPtr window,
PixmapPtr pixmap,
CARD32 serial,
RegionPtr valid,
RegionPtr update,
int16_t x_off,
int16_t y_off,
RRCrtcPtr target_crtc,
SyncFence *wait_fence,
SyncFence *idle_fence,
uint32_t options,
uint64_t target_window_msc,
uint64_t divisor,
uint64_t remainder,
present_notify_ptr notifies,
int num_notifies)
{
uint64_t ust = 0;
uint64_t target_msc;
uint64_t crtc_msc = 0;
int ret;
present_vblank_ptr vblank, tmp;
ScreenPtr screen = window->drawable.pScreen;
present_window_priv_ptr window_priv = present_get_window_priv(window, TRUE);
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
if (!window_priv)
return BadAlloc;
if (!screen_priv || !screen_priv->info)
target_crtc = NULL;
else if (!target_crtc) {
/* Update the CRTC if we have a pixmap or we don't have a CRTC
*/
if (!pixmap)
target_crtc = window_priv->crtc;
if (!target_crtc || target_crtc == PresentCrtcNeverSet)
target_crtc = present_get_crtc(window);
}
ret = present_get_ust_msc(screen, target_crtc, &ust, &crtc_msc);
present_scmd_update_window_crtc(window, target_crtc, crtc_msc);
if (ret == Success) {
/* Stash the current MSC away in case we need it later
*/
window_priv->msc = crtc_msc;
}
target_msc = present_get_target_msc(target_window_msc + window_priv->msc_offset,
crtc_msc,
divisor,
remainder,
options);
/*
* Look for a matching presentation already on the list and
* don't bother doing the previous one if this one will overwrite it
* in the same frame
*/
if (!update && pixmap) {
xorg_list_for_each_entry_safe(vblank, tmp, &window_priv->vblank, window_list) {
if (!vblank->pixmap)
continue;
if (!vblank->queued)
continue;
if (vblank->crtc != target_crtc || vblank->target_msc != target_msc)
continue;
present_vblank_scrap(vblank);
if (vblank->flip_ready)
present_re_execute(vblank);
}
}
vblank = present_vblank_create(window,
pixmap,
serial,
valid,
update,
x_off,
y_off,
target_crtc,
wait_fence,
idle_fence,
options,
screen_priv->info ? &screen_priv->info->capabilities : NULL,
notifies,
num_notifies,
target_msc,
crtc_msc);
if (!vblank)
return BadAlloc;
if (vblank->flip && vblank->sync_flip)
vblank->exec_msc--;
xorg_list_append(&vblank->event_queue, &present_exec_queue);
vblank->queued = TRUE;
if (msc_is_after(vblank->exec_msc, crtc_msc)) {
ret = present_queue_vblank(screen, window, target_crtc, vblank->event_id, vblank->exec_msc);
if (ret == Success)
return Success;
DebugPresent(("present_queue_vblank failed\n"));
}
present_execute(vblank, ust, crtc_msc);
return Success;
}
static void
present_scmd_abort_vblank(ScreenPtr screen, WindowPtr window, RRCrtcPtr crtc, uint64_t event_id, uint64_t msc)
{
present_vblank_ptr vblank;
if (crtc == NULL)
present_fake_abort_vblank(screen, event_id, msc);
else
{
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
(*screen_priv->info->abort_vblank) (crtc, event_id, msc);
}
xorg_list_for_each_entry(vblank, &present_exec_queue, event_queue) {
int64_t match = event_id - vblank->event_id;
if (match == 0) {
xorg_list_del(&vblank->event_queue);
vblank->queued = FALSE;
return;
}
}
xorg_list_for_each_entry(vblank, &present_flip_queue, event_queue) {
if (vblank->event_id == event_id) {
xorg_list_del(&vblank->event_queue);
vblank->queued = FALSE;
return;
}
}
}
static void
present_scmd_flip_destroy(ScreenPtr screen)
{
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
/* Reset window pixmaps back to the screen pixmap */
if (screen_priv->flip_pending)
present_set_abort_flip(screen);
/* Drop reference to any pending flip or unflip pixmaps. */
present_flip_idle(screen);
}
void
present_scmd_init_mode_hooks(present_screen_priv_ptr screen_priv)
{
screen_priv->query_capabilities = &present_scmd_query_capabilities;
screen_priv->get_crtc = &present_scmd_get_crtc;
screen_priv->check_flip = &present_check_flip;
screen_priv->check_flip_window = &present_check_flip_window;
screen_priv->can_window_flip = &present_scmd_can_window_flip;
screen_priv->present_pixmap = &present_scmd_pixmap;
screen_priv->create_event_id = &present_scmd_create_event_id;
screen_priv->queue_vblank = &present_queue_vblank;
screen_priv->flush = &present_flush;
screen_priv->re_execute = &present_re_execute;
screen_priv->abort_vblank = &present_scmd_abort_vblank;
screen_priv->flip_destroy = &present_scmd_flip_destroy;
}
Bool
present_init(void)
{
xorg_list_init(&present_exec_queue);
xorg_list_init(&present_flip_queue);
present_fake_queue_init();
return TRUE;
}
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