void
miWindowExposures(WindowPtr pWin, RegionPtr prgn)
{
RegionPtr exposures = prgn;
if (prgn && !RegionNil(prgn)) {
RegionRec expRec;
int clientInterested =
(pWin->eventMask | wOtherEventMasks(pWin)) & ExposureMask;
if (clientInterested && (RegionNumRects(prgn) > RECTLIMIT)) {
/*
* If we have LOTS of rectangles, we decide to take the extents
* and force an exposure on that. This should require much less
* work overall, on both client and server. This is cheating, but
* isn't prohibited by the protocol ("spontaneous combustion" :-).
*/
BoxRec box = *RegionExtents(prgn);
exposures = &expRec;
RegionInit(exposures, &box, 1);
RegionReset(prgn, &box);
/* miPaintWindow doesn't clip, so we have to */
RegionIntersect(prgn, prgn, &pWin->clipList);
}
pWin->drawable.pScreen->PaintWindow(pWin, prgn, PW_BACKGROUND);
if (clientInterested)
miSendExposures(pWin, exposures,
pWin->drawable.x, pWin->drawable.y);
if (exposures == &expRec)
RegionUninit(exposures);
RegionEmpty(prgn);
}
}
static void expose_1 (WindowPtr pWin) {
WindowPtr pChild;
if (!pWin->realized)
return;
miPaintWindow(pWin, &pWin->borderClip, PW_BACKGROUND);
/* FIXME: comments in windowstr.h indicate that borderClip doesn't
include subwindow visibility. But I'm not so sure.. so we may
be exposing too much.. */
miSendExposures (pWin, &pWin->borderClip,
pWin->drawable.x, pWin->drawable.y);
for (pChild = pWin->firstChild; pChild != NULL; pChild = pChild->nextSib)
expose_1 (pChild);
}
void
xnestCollectExposures(void)
{
XEvent X;
WindowPtr pWin;
RegionRec Rgn;
BoxRec Box;
while (XCheckIfEvent(xnestDisplay, &X, xnestExposurePredicate, NULL)) {
pWin = xnestWindowPtr(X.xexpose.window);
if (pWin && X.xexpose.width && X.xexpose.height) {
Box.x1 = pWin->drawable.x + wBorderWidth(pWin) + X.xexpose.x;
Box.y1 = pWin->drawable.y + wBorderWidth(pWin) + X.xexpose.y;
Box.x2 = Box.x1 + X.xexpose.width;
Box.y2 = Box.y1 + X.xexpose.height;
RegionInit(&Rgn, &Box, 1);
miSendExposures(pWin, &Rgn, Box.x2, Box.y2);
}
}
}
