# This file was automatically generated by SWIG (http://www.swig.org).
# Version 4.0.1
#
# Do not make changes to this file unless you know what you are doing--modify
# the SWIG interface file instead.

from sys import version_info as _swig_python_version_info
if _swig_python_version_info < (2, 7, 0):
    raise RuntimeError("Python 2.7 or later required")

# Import the low-level C/C++ module
if __package__ or "." in __name__:
    from . import _trace_skeleton
else:
    import _trace_skeleton

try:
    import builtins as __builtin__
except ImportError:
    import __builtin__

def _swig_repr(self):
    try:
        strthis = "proxy of " + self.this.__repr__()
    except __builtin__.Exception:
        strthis = ""
    return "<%s.%s; %s >" % (self.__class__.__module__, self.__class__.__name__, strthis,)


def _swig_setattr_nondynamic_instance_variable(set):
    def set_instance_attr(self, name, value):
        if name == "thisown":
            self.this.own(value)
        elif name == "this":
            set(self, name, value)
        elif hasattr(self, name) and isinstance(getattr(type(self), name), property):
            set(self, name, value)
        else:
            raise AttributeError("You cannot add instance attributes to %s" % self)
    return set_instance_attr


def _swig_setattr_nondynamic_class_variable(set):
    def set_class_attr(cls, name, value):
        if hasattr(cls, name) and not isinstance(getattr(cls, name), property):
            set(cls, name, value)
        else:
            raise AttributeError("You cannot add class attributes to %s" % cls)
    return set_class_attr


def _swig_add_metaclass(metaclass):
    """Class decorator for adding a metaclass to a SWIG wrapped class - a slimmed down version of six.add_metaclass"""
    def wrapper(cls):
        return metaclass(cls.__name__, cls.__bases__, cls.__dict__.copy())
    return wrapper


class _SwigNonDynamicMeta(type):
    """Meta class to enforce nondynamic attributes (no new attributes) for a class"""
    __setattr__ = _swig_setattr_nondynamic_class_variable(type.__setattr__)



def trace(im, w, h, csize, maxIter):
    return _trace_skeleton.trace(im, w, h, csize, maxIter)

def pop_point():
    return _trace_skeleton.pop_point()

def len_polyline():
    return _trace_skeleton.len_polyline()

csizeDefault = 10
maxIterDefault = 999

def from_list(arr, w, h, csize=csizeDefault, maxIter=maxIterDefault):
	im = str(bytes(arr), 'ascii')
	trace(im, w, h, csize, maxIter)
	P = [];
	while (len_polyline() != -1):
		P.append([])
		n = len_polyline();
		for i in range(0,n):
			idx = pop_point()
			x = idx % w;
			y = idx //w;
			P[-1].append((x,y))
	return P

def from_list2d(arr, csize=csizeDefault, maxIter=maxIterDefault):
	if (len(arr) == 0):
		return []
	flatten = lambda l: [item for sublist in l for item in sublist]
	return from_list(flatten(arr), len(arr[0]), len(arr), csize, maxIter)

def from_numpy(arr, csize=csizeDefault, maxIter=maxIterDefault):
	w = arr.shape[1]
	h = arr.shape[0]
	arr[arr > 0] = 1
	return from_list(arr.flatten().tolist(), w, h, csize, maxIter)