int xdamage_hint_skip(int y) {
static sraRegionPtr scanline = NULL;
static sraRegionPtr tmpl_y = NULL;
int fast_tmpl = 1;
sraRegionPtr reg, tmpl;
int ret, i, n, nreg;
#ifndef NO_NCACHE
static int ncache_no_skip = 0;
static double last_ncache_no_skip = 0.0;
static double last_ncache_no_skip_long = 0.0, ncache_fac = 0.25;
#endif
if (! xdamage_present || ! use_xdamage) {
return 0; /* cannot skip */
}
if (! xdamage_regions) {
return 0; /* cannot skip */
}
if (! scanline) {
/* keep it around to avoid malloc etc, recreate */
scanline = sraRgnCreate();
}
if (! tmpl_y) {
tmpl_y = sraRgnCreateRect(0, 0, dpy_x, 1);
}
nreg = (xdamage_memory * NSCAN) + 1;
#ifndef NO_NCACHE
if (ncache > 0) {
if (ncache_no_skip == 0) {
double now = g_now;
if (now > last_ncache_no_skip + 8.0) {
ncache_no_skip = 1;
} else if (now < last_bs_restore + 0.5) {
ncache_no_skip = 1;
} else if (now < last_su_restore + 0.5) {
ncache_no_skip = 1;
} else if (now < last_copyrect + 0.5) {
ncache_no_skip = 1;
}
if (ncache_no_skip) {
last_ncache_no_skip = dnow();
if (now > last_ncache_no_skip_long + 60.0) {
ncache_fac = 2.0;
last_ncache_no_skip_long = now;
} else {
ncache_fac = 0.25;
}
return 0;
}
} else {
if (ncache_no_skip++ >= ncache_fac*nreg + 4) {
ncache_no_skip = 0;
} else {
return 0;
}
}
}
#endif
if (fast_tmpl) {
sraRgnOffset(tmpl_y, 0, y);
tmpl = tmpl_y;
} else {
tmpl = sraRgnCreateRect(0, y, dpy_x, y+1);
}
ret = 1;
for (i=0; i<nreg; i++) {
/* go back thru the history starting at most recent */
n = (xdamage_ticker + nreg - i) % nreg;
reg = xdamage_regions[n];
if (reg == NULL) {
continue;
}
if (sraRgnEmpty(reg)) {
/* checking for emptiness is very fast */
continue;
}
sraRgnMakeEmpty(scanline);
sraRgnOr(scanline, tmpl);
if (sraRgnAnd(scanline, reg)) {
ret = 0;
break;
}
}
if (fast_tmpl) {
sraRgnOffset(tmpl_y, 0, -y);
} else {
sraRgnDestroy(tmpl);
}
if (0) fprintf(stderr, "xdamage_hint_skip: %d -> %d\n", y, ret);
return ret;
}
void rfbScheduleCopyRegion(rfbScreenInfoPtr rfbScreen,sraRegionPtr copyRegion,int dx,int dy)
{
rfbClientIteratorPtr iterator;
rfbClientPtr cl;
iterator=rfbGetClientIterator(rfbScreen);
while((cl=rfbClientIteratorNext(iterator))) {
LOCK(cl->updateMutex);
if(cl->useCopyRect) {
sraRegionPtr modifiedRegionBackup;
if(!sraRgnEmpty(cl->copyRegion)) {
if(cl->copyDX!=dx || cl->copyDY!=dy) {
/* if a copyRegion was not yet executed, treat it as a
* modifiedRegion. The idea: in this case it could be
* source of the new copyRect or modified anyway. */
sraRgnOr(cl->modifiedRegion,cl->copyRegion);
sraRgnMakeEmpty(cl->copyRegion);
} else {
/* we have to set the intersection of the source of the copy
* and the old copy to modified. */
modifiedRegionBackup=sraRgnCreateRgn(copyRegion);
sraRgnOffset(modifiedRegionBackup,-dx,-dy);
sraRgnAnd(modifiedRegionBackup,cl->copyRegion);
sraRgnOr(cl->modifiedRegion,modifiedRegionBackup);
sraRgnDestroy(modifiedRegionBackup);
}
}
sraRgnOr(cl->copyRegion,copyRegion);
cl->copyDX = dx;
cl->copyDY = dy;
/* if there were modified regions, which are now copied,
* mark them as modified, because the source of these can be overlapped
* either by new modified or now copied regions. */
modifiedRegionBackup=sraRgnCreateRgn(cl->modifiedRegion);
sraRgnOffset(modifiedRegionBackup,dx,dy);
sraRgnAnd(modifiedRegionBackup,cl->copyRegion);
sraRgnOr(cl->modifiedRegion,modifiedRegionBackup);
sraRgnDestroy(modifiedRegionBackup);
if(!cl->enableCursorShapeUpdates) {
/*
* n.b. (dx, dy) is the vector pointing in the direction the
* copyrect displacement will take place. copyRegion is the
* destination rectangle (say), not the source rectangle.
*/
sraRegionPtr cursorRegion;
int x = cl->cursorX - cl->screen->cursor->xhot;
int y = cl->cursorY - cl->screen->cursor->yhot;
int w = cl->screen->cursor->width;
int h = cl->screen->cursor->height;
cursorRegion = sraRgnCreateRect(x, y, x + w, y + h);
sraRgnAnd(cursorRegion, cl->copyRegion);
if(!sraRgnEmpty(cursorRegion)) {
/*
* current cursor rect overlaps with the copy region *dest*,
* mark it as modified since we won't copy-rect stuff to it.
*/
sraRgnOr(cl->modifiedRegion, cursorRegion);
}
sraRgnDestroy(cursorRegion);
cursorRegion = sraRgnCreateRect(x, y, x + w, y + h);
/* displace it to check for overlap with copy region source: */
sraRgnOffset(cursorRegion, dx, dy);
sraRgnAnd(cursorRegion, cl->copyRegion);
if(!sraRgnEmpty(cursorRegion)) {
/*
* current cursor rect overlaps with the copy region *source*,
* mark the *displaced* cursorRegion as modified since we
* won't copyrect stuff to it.
*/
sraRgnOr(cl->modifiedRegion, cursorRegion);
}
sraRgnDestroy(cursorRegion);
}
} else {
sraRgnOr(cl->modifiedRegion,copyRegion);
}
TSIGNAL(cl->updateCond);
UNLOCK(cl->updateMutex);
}
rfbReleaseClientIterator(iterator);
}
void rfbScheduleCopyRegion(rfbScreenInfoPtr rfbScreen,sraRegionPtr copyRegion,int dx,int dy)
{
rfbClientIteratorPtr iterator;
rfbClientPtr cl;
iterator=rfbGetClientIterator(rfbScreen);
while((cl=rfbClientIteratorNext(iterator))) {
LOCK(cl->updateMutex);
if(cl->useCopyRect) {
sraRegionPtr modifiedRegionBackup;
if(!sraRgnEmpty(cl->copyRegion)) {
if(cl->copyDX!=dx || cl->copyDY!=dy) {
/* if a copyRegion was not yet executed, treat it as a
* modifiedRegion. The idea: in this case it could be
* source of the new copyRect or modified anyway. */
sraRgnOr(cl->modifiedRegion,cl->copyRegion);
sraRgnMakeEmpty(cl->copyRegion);
} else {
/* we have to set the intersection of the source of the copy
* and the old copy to modified. */
modifiedRegionBackup=sraRgnCreateRgn(copyRegion);
sraRgnOffset(modifiedRegionBackup,-dx,-dy);
sraRgnAnd(modifiedRegionBackup,cl->copyRegion);
sraRgnOr(cl->modifiedRegion,modifiedRegionBackup);
sraRgnDestroy(modifiedRegionBackup);
}
}
sraRgnOr(cl->copyRegion,copyRegion);
cl->copyDX = dx;
cl->copyDY = dy;
/* if there were modified regions, which are now copied,
* mark them as modified, because the source of these can be overlapped
* either by new modified or now copied regions. */
modifiedRegionBackup=sraRgnCreateRgn(cl->modifiedRegion);
sraRgnOffset(modifiedRegionBackup,dx,dy);
sraRgnAnd(modifiedRegionBackup,cl->copyRegion);
sraRgnOr(cl->modifiedRegion,modifiedRegionBackup);
sraRgnDestroy(modifiedRegionBackup);
#if 0
/* TODO: is this needed? Or does it mess up deferring? */
/* while(!sraRgnEmpty(cl->copyRegion)) */ {
{
sraRegionPtr updateRegion = sraRgnCreateRgn(cl->modifiedRegion);
sraRgnOr(updateRegion,cl->copyRegion);
UNLOCK(cl->updateMutex);
rfbSendFramebufferUpdate(cl,updateRegion);
sraRgnDestroy(updateRegion);
continue;
}
}
#endif
} else {
sraRgnOr(cl->modifiedRegion,copyRegion);
}
UNLOCK(cl->updateMutex);
}
rfbReleaseClientIterator(iterator);
}
