internal static int TranslateCombinationMode(RegionCombinationMode mode, string parameterName = null)
{
switch (mode)
{
case RegionCombinationMode.Intersect: return(1);
case RegionCombinationMode.Union: return(2);
case RegionCombinationMode.UnionExceptOverlap: return(3);
default: throw new ArgumentException("Unrecognized regionCombinationMode", parameterName ?? nameof(mode));
}
}
public int SetClippingRegion(Region region, RegionCombinationMode combinationMode)
{
return(NativeMethods.ExtSelectClipRgn(Handle, region.Handle,
Region.TranslateCombinationMode(combinationMode, nameof(combinationMode))));
}
public void Combine(Region other, RegionCombinationMode mode)
{
NativeMethods.CombineRgn(Handle, Handle, other.Handle, TranslateCombinationMode(mode, nameof(mode)));
}
