public unsafe static RECT[] GetRectsFromRegion(Gdi32.RGNDATAHEADER *regionData)
{
int count;
if (regionData is null || (count = (int)regionData->nCount) == 0)
{
return(Array.Empty <RECT>());
}
var regionRects = new RECT[count];
Span <RECT> sourceRects = new Span <RECT>((byte *)regionData + regionData->dwSize, count);
sourceRects.CopyTo(regionRects.AsSpan());
return(regionRects);
}