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69 lines
2.3 KiB
ReStructuredText
69 lines
2.3 KiB
ReStructuredText
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.. py:module:: PIL.ImagePath
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.. py:currentmodule:: PIL.ImagePath
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:py:mod:`ImagePath` Module
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==========================
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The :py:mod:`ImagePath` module is used to store and manipulate 2-dimensional
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vector data. Path objects can be passed to the methods on the
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:py:mod:`~PIL.ImageDraw` module.
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.. py:class:: PIL.ImagePath.Path
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A path object. The coordinate list can be any sequence object containing
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either 2-tuples [(x, y), …] or numeric values [x, y, …].
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You can also create a path object from another path object.
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In 1.1.6 and later, you can also pass in any object that implements
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Python’s buffer API. The buffer should provide read access, and contain C
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floats in machine byte order.
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The path object implements most parts of the Python sequence interface, and
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behaves like a list of (x, y) pairs. You can use len(), item access, and
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slicing as usual. However, the current version does not support slice
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assignment, or item and slice deletion.
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:param xy: A sequence. The sequence can contain 2-tuples [(x, y), ...]
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or a flat list of numbers [x, y, ...].
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.. py:method:: PIL.ImagePath.Path.compact(distance=2)
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Compacts the path, by removing points that are close to each other. This
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method modifies the path in place, and returns the number of points left in
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the path.
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**distance** is measured as `Manhattan distance`_ and defaults to two
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pixels.
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.. _Manhattan distance: http://en.wikipedia.org/wiki/Manhattan_distance
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.. py:method:: PIL.ImagePath.Path.getbbox()
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Gets the bounding box of the path.
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:return: ``(x0, y0, x1, y1)``
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.. py:method:: PIL.ImagePath.Path.map(function)
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Maps the path through a function.
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.. py:method:: PIL.ImagePath.Path.tolist(flat=0)
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Converts the path to a Python list [(x, y), …].
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:param flat: By default, this function returns a list of 2-tuples
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[(x, y), ...]. If this argument is :keyword:`True`, it
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returns a flat list [x, y, ...] instead.
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:return: A list of coordinates. See **flat**.
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.. py:method:: PIL.ImagePath.Path.transform(matrix)
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Transforms the path in place, using an affine transform. The matrix is a
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6-tuple (a, b, c, d, e, f), and each point is mapped as follows:
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.. code-block:: python
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xOut = xIn * a + yIn * b + c
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yOut = xIn * d + yIn * e + f
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