/// <summary>
/// 1 This is buggy. It seems to locate watersheds that are
/// duplicates. The watershed extraction after complete fill
/// grabs some regions belonging to existing watersheds.
/// See prog/watershedtest.c for testing.
/// </summary>
/// <param name="wshed">generated from wshedCreate()</param>
/// <returns>false if OK, true on error</returns>
public static bool wshedApply(this L_WShed wshed)
{
if (null == wshed)
{
throw new ArgumentNullException("wshed cannot be null.");
}
return(Native.DllImports.wshedApply((HandleRef)wshed));
}
// Output
/// <summary>
///
/// </summary>
/// <param name="wshed"></param>
/// <param name="ppixa">[optional] mask of watershed basins</param>
/// <param name="pnalevels">[optional] watershed levels</param>
/// <returns>false if OK, true on error</returns>
public static bool wshedBasins(this L_WShed wshed, ref Pixa ppixa, ref Numa pnalevels)
{
if (null == wshed)
{
throw new ArgumentNullException("wshed cannot be null.");
}
IntPtr ppixaPtr = (IntPtr)ppixa;
IntPtr pnalevelsPtr = (IntPtr)pnalevels;
return(Native.DllImports.wshedBasins((HandleRef)wshed, ref ppixaPtr, ref pnalevelsPtr));
}
/// <summary>
///
/// </summary>
/// <param name="pwshed">will be set to null before returning</param>
public static void wshedDestroy(this L_WShed pwshed)
{
if (null == pwshed)
{
throw new ArgumentNullException("pwshed cannot be null");
}
var pointer = (IntPtr)pwshed;
Native.DllImports.wshedDestroy(ref pointer);
pwshed = null;
}
/// <summary>
///
/// </summary>
/// <param name="wshed"></param>
/// <returns>pixd initial image with all basins filled, or NULL on error</returns>
public static Pix wshedRenderColors(this L_WShed wshed)
{
if (null == wshed)
{
throw new ArgumentNullException("wshed cannot be null.");
}
var pointer = Native.DllImports.wshedRenderColors((HandleRef)wshed);
if (IntPtr.Zero == pointer)
{
return(null);
}
else
{
return(new Pix(pointer));
}
}