servers/app/Desktop.cpp

1489 	// the dirty region starts with the visible area of the window being moved
1504 	// construct the region that is possible to be blitted
1509 		// newDirtyRegion == the windows old visible region
1511 	// include the the new visible region of the window being
1512 	// moved into the dirty region (for now)
1522 	// in the dirty region, exclude the parts that we
1561 	// The dirty region for the inside of the window is constructed by the window itself in
1564 	// Track the dirty region outside the window in case it is shrunk in "previouslyOccupiedRegion"
1566 	// Track the region that was drawn in previous update sessions, so we can compute the newly
1567 	// exposed areas by excluding this from the update region.
1582 	// we just care for the region outside the window
1586 	// its visible region...
1591 	// calculate old expose region as window visible region difference
1594 	// ...and new expose region as window content visible region difference
2185 		// send redraw messages to all windows intersecting the dirty region
3178 	// region anymore, so we need to remember
3442 	// the available region on screen starts with the entire screen area
3460 			// that windows region is not available on screen anymore
3470 	// send redraw messages to all windows intersecting the dirty region
3484 	// in the clipping region rebuild, but it is
3488 	// remember the region not covered by any windows
3516 	// take care about restricting our dirty region.
3536 			// that windows region is not available on screen anymore
3603 	// update our cached screen region
3614 	// figure out dirty region
3769 	// build region of windows that are no longer visible in the new workspace
3801 	// Show windows, and include them in the changed region - but only
3840 			// We need to remember the previous visible region of the
3842 			ObjectDeleter<BRegion> region(new (std::nothrow)
3844 			if (region.IsSet()) {
3845 				if (previousRegions.AddItem(region.Detach()))
3886 		BRegion* region = (BRegion*)previousRegions.ItemAt(i);
3887 		region->ExclusiveInclude(&window->VisibleRegion());
3888 		dirty.Include(region);
3889 		delete region;