/**
* Vertically invert a region.
*/
static void
InvertRegion(RegionPtr reg, int height)
{
const BoxPtr b = REGION_RECTS(reg);
const int n = REGION_NUM_RECTS(reg);
int i;
RegionRec newRegion;
miRegionInit(&newRegion, NULL, 0);
CRASSERT(miValidRegion(reg));
for (i = 0; i < n; i++) {
BoxRec invBox;
RegionRec invReg;
invBox.x1 = b[i].x1;
invBox.y1 = height - b[i].y2;
invBox.x2 = b[i].x2;
invBox.y2 = height - b[i].y1;
CRASSERT(invBox.y1 <= invBox.y2);
miRegionInit(&invReg, &invBox, 1);
REGION_UNION(&newRegion, &newRegion, &invReg);
REGION_UNINIT(&invReg);
}
CRASSERT(miValidRegion(&newRegion));
REGION_COPY(reg, &newRegion);
REGION_UNINIT(&newRegion);
}
// FIXME: Make BoxRec and Rect identical to get rid of conversions.
Region::Region(const Rect *rect)
{
if (!rect->isEmpty()) {
BoxRec box;
box.x1 = rect->left;
box.x2 = rect->right;
box.y1 = rect->top;
box.y2 = rect->bottom;
miRegionInit(&m_reg, &box, 0);
} else {
miRegionInit(&m_reg, NullBox, 0);
}
}
/**
* 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 */
}
Region::Region(const Region &src)
{
miRegionInit(&m_reg, NullBox, 0);
set(&src);
}
Region::Region()
{
miRegionInit(&m_reg, NullBox, 0);
}
