/**
* Union the window's accum-dirty and prev-accum-dirty regions with the
* incoming region.
* Called by crHashtableWalk() via vncspuGetScreenRects().
*/
static void
WindowDirtyUnionCB(unsigned long key, void *windowData, void *regionData)
{
WindowInfo *window = (WindowInfo *) windowData;
RegionPtr regionUnion = (RegionPtr) regionData;
RegionRec accumScrn; /* accumulated region, in screen coords */
Bool overlap;
miRegionInit(&accumScrn, NULL, 0); /* init local var */
CRASSERT(miValidRegion(&window->accumDirtyRegion));
CRASSERT(miValidRegion(&window->prevAccumDirtyRegion));
/*
crDebug("accum area: %d prev accum: %d",
miRegionArea(&window->accumDirtyRegion),
miRegionArea(&window->prevAccumDirtyRegion));
*/
/* at first, accumScrn region is in window coords */
REGION_UNION(&accumScrn,
&window->accumDirtyRegion,
&window->prevAccumDirtyRegion);
/* intersect with window bounds */
REGION_INTERSECT(&accumScrn,
&accumScrn,
&window->clipRegion);
REGION_VALIDATE(&accumScrn, &overlap);
/* change y=0=bottom to y=0=top */
InvertRegion(&accumScrn, window->height ? window->height : 1);
if (REGION_NUM_RECTS(&accumScrn) == 1 &&
accumScrn.extents.x1 == 0 &&
accumScrn.extents.y1 == 0 &&
accumScrn.extents.x2 == 1 &&
accumScrn.extents.y2 == 1) {
/* empty / sentinal region */
}
else {
/* add window offset */
miTranslateRegion(&accumScrn, window->xPos, window->yPos);
}
/* now, accumScrn region is in screen coords */
REGION_UNION(regionUnion, regionUnion, &accumScrn);
REGION_UNINIT(&accumScrn); /* done with local var */
}
void Region::translate(int dx, int dy)
{
miTranslateRegion(&m_reg, dx, dy);
}