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pep8
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hugovk
parent
adfbe8323a
commit
a3edb45f08
88
PIL/Image.py
88
PIL/Image.py
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@ -30,6 +30,7 @@ from PIL import VERSION, PILLOW_VERSION, _plugins
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import warnings
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class _imaging_not_installed:
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# module placeholder
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def __getattr__(self, id):
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@ -94,7 +95,8 @@ from PIL import ImageMode
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from PIL._binary import i8, o8
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from PIL._util import isPath, isStringType, deferred_error
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import os, sys
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import os
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import sys
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# type stuff
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import collections
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@ -108,6 +110,7 @@ try:
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except:
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HAS_CFFI = False
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def isImageType(t):
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"""
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Checks if an object is an image object.
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@ -248,6 +251,7 @@ _MODE_CONV = {
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"I;32LS": ('<i4', None),
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}
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def _conv_type_shape(im):
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shape = im.size[1], im.size[0]
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typ, extra = _MODE_CONV[im.mode]
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@ -379,6 +383,7 @@ def init():
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_initialized = 2
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return 1
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# --------------------------------------------------------------------
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# Codec factories (used by tobytes/frombytes and ImageFile.load)
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@ -398,6 +403,7 @@ def _getdecoder(mode, decoder_name, args, extra=()):
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except AttributeError:
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raise IOError("decoder %s not available" % decoder_name)
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def _getencoder(mode, encoder_name, args, extra=()):
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# tweak arguments
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@ -421,14 +427,18 @@ def _getencoder(mode, encoder_name, args, extra=()):
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def coerce_e(value):
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return value if isinstance(value, _E) else _E(value)
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class _E:
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def __init__(self, data):
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self.data = data
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def __add__(self, other):
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return _E((self.data, "__add__", coerce_e(other).data))
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def __mul__(self, other):
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return _E((self.data, "__mul__", coerce_e(other).data))
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def _getscaleoffset(expr):
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stub = ["stub"]
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data = expr(_E(stub)).data
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@ -438,13 +448,15 @@ def _getscaleoffset(expr):
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return c, 0.0
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if (a is stub and b == "__add__" and isinstance(c, numbers.Number)):
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return 1.0, c
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except TypeError: pass
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except TypeError:
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pass
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try:
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((a, b, c), d, e) = data # full syntax
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if (a is stub and b == "__mul__" and isinstance(c, numbers.Number) and
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d == "__add__" and isinstance(e, numbers.Number)):
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return c, e
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except TypeError: pass
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except TypeError:
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pass
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raise ValueError("illegal expression")
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@ -500,6 +512,7 @@ class Image:
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# Context Manager Support
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def __enter__(self):
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return self
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def __exit__(self, *args):
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self.close()
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@ -525,7 +538,6 @@ class Image:
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# object is gone.
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self.im = deferred_error(ValueError("Operation on closed image"))
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def _copy(self):
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self.load()
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self.im = self.im.copy()
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@ -533,7 +545,8 @@ class Image:
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self.readonly = 0
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def _dump(self, file=None, format=None):
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import tempfile, os
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import tempfile
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import os
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suffix = ''
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if format:
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suffix = '.'+format
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@ -637,9 +650,11 @@ class Image:
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if self.mode != "1":
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raise ValueError("not a bitmap")
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data = self.tobytes("xbm")
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return b"".join([("#define %s_width %d\n" % (name, self.size[0])).encode('ascii'),
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return b"".join([
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("#define %s_width %d\n" % (name, self.size[0])).encode('ascii'),
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("#define %s_height %d\n" % (name, self.size[1])).encode('ascii'),
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("static char %s_bits[] = {\n" % name).encode('ascii'), data, b"};"])
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("static char %s_bits[] = {\n" % name).encode('ascii'), data, b"};"
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])
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def frombytes(self, data, decoder_name="raw", *args):
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"""
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@ -672,7 +687,9 @@ class Image:
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.. deprecated:: 2.0
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"""
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warnings.warn('fromstring() is deprecated. Please call frombytes() instead.', DeprecationWarning)
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warnings.warn(
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'fromstring() is deprecated. Please call frombytes() instead.',
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DeprecationWarning)
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return self.frombytes(*args, **kw)
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def load(self):
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@ -783,7 +800,8 @@ class Image:
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trns = None
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delete_trns = False
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# transparency handling
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if "transparency" in self.info and self.info['transparency'] is not None:
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if "transparency" in self.info and \
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self.info['transparency'] is not None:
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if self.mode in ('L', 'RGB') and mode == 'RGBA':
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# Use transparent conversion to promote from transparent
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# color to an alpha channel.
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@ -793,7 +811,8 @@ class Image:
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t = self.info['transparency']
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if isinstance(t, bytes):
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# Dragons. This can't be represented by a single color
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warnings.warn('Palette images with Transparency expressed '+
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warnings.warn(
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'Palette images with Transparency expressed ' +
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' in bytes should be converted to RGBA images')
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delete_trns = True
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else:
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@ -812,7 +831,6 @@ class Image:
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trns_im = trns_im.convert('RGB')
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trns = trns_im.getpixel((0, 0))
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if mode == "P" and palette == ADAPTIVE:
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im = self.im.quantize(colors)
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new = self._new(im)
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@ -829,7 +847,8 @@ class Image:
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# if we can't make a transparent color, don't leave the old
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# transparency hanging around to mess us up.
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del(new.info['transparency'])
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warnings.warn("Couldn't allocate palette entry for transparency")
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warnings.warn("Couldn't allocate palette entry " +
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"for transparency")
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return new
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# colorspace conversion
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@ -856,7 +875,8 @@ class Image:
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new_im.info['transparency'] = new_im.palette.getcolor(trns)
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except:
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del(new_im.info['transparency'])
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warnings.warn("Couldn't allocate palette entry for transparency")
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warnings.warn("Couldn't allocate palette entry " +
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"for transparency")
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else:
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new_im.info['transparency'] = trns
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return new_im
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@ -972,7 +992,8 @@ class Image:
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if isinstance(filter, collections.Callable):
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filter = filter()
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if not hasattr(filter, "filter"):
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raise TypeError("filter argument should be ImageFilter.Filter instance or class")
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raise TypeError("filter argument should be ImageFilter.Filter " +
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"instance or class")
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if self.im.bands == 1:
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return self._new(filter.filter(self.im))
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@ -1079,7 +1100,6 @@ class Image:
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self.load()
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return self.im.ptr
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def getpalette(self):
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"""
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Returns the image palette as a list.
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@ -1097,7 +1117,6 @@ class Image:
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except ValueError:
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return None # no palette
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def getpixel(self, xy):
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"""
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Returns the pixel value at a given position.
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@ -1218,7 +1237,8 @@ class Image:
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if isImageType(box) and mask is None:
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# abbreviated paste(im, mask) syntax
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mask = box; box = None
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mask = box
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box = None
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if box is None:
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# cover all of self
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@ -1501,6 +1521,7 @@ class Image:
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math.cos(angle), math.sin(angle), 0.0,
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-math.sin(angle), math.cos(angle), 0.0
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]
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def transform(x, y, matrix=matrix):
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(a, b, c, d, e, f) = matrix
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return a*x + b*y + c, d*x + e*y + f
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@ -1691,8 +1712,9 @@ class Image:
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important than quality.
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Also note that this function modifies the :py:class:`~PIL.Image.Image`
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object in place. If you need to use the full resolution image as well, apply
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this method to a :py:meth:`~PIL.Image.Image.copy` of the original image.
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object in place. If you need to use the full resolution image as well,
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apply this method to a :py:meth:`~PIL.Image.Image.copy` of the
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original image.
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:param size: Requested size.
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:param resample: Optional resampling filter. This can be one
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@ -1709,8 +1731,12 @@ class Image:
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# preserve aspect ratio
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x, y = self.size
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if x > size[0]: y = int(max(y * size[0] / x, 1)); x = int(size[0])
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if y > size[1]: x = int(max(x * size[1] / y, 1)); y = int(size[1])
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if x > size[0]:
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y = int(max(y * size[0] / x, 1))
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x = int(size[0])
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if y > size[1]:
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x = int(max(x * size[1] / y, 1))
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y = int(size[1])
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size = x, y
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if size == self.size:
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@ -1761,7 +1787,8 @@ class Image:
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"""
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if self.mode == 'RGBA':
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return self.convert('RGBa').transform(size, method, data, resample, fill).convert('RGBA')
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return self.convert('RGBa').transform(
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size, method, data, resample, fill).convert('RGBA')
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if isinstance(method, ImageTransformHandler):
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return method.transform(size, self, resample=resample, fill=fill)
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@ -1808,8 +1835,13 @@ class Image:
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elif method == QUAD:
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# quadrilateral warp. data specifies the four corners
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# given as NW, SW, SE, and NE.
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nw = data[0:2]; sw = data[2:4]; se = data[4:6]; ne = data[6:8]
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x0, y0 = nw; As = 1.0 / w; At = 1.0 / h
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nw = data[0:2]
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sw = data[2:4]
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se = data[4:6]
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ne = data[6:8]
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x0, y0 = nw
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As = 1.0 / w
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At = 1.0 / h
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data = (x0, (ne[0]-x0)*As, (sw[0]-x0)*At,
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(se[0]-sw[0]-ne[0]+x0)*As*At,
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y0, (ne[1]-y0)*As, (sw[1]-y0)*At,
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@ -1843,6 +1875,7 @@ class Image:
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im = self.im.transpose(method)
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return self._new(im)
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# --------------------------------------------------------------------
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# Lazy operations
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@ -1878,6 +1911,7 @@ class _ImageCrop(Image):
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# FIXME: future versions should optimize crop/paste
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# sequences!
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# --------------------------------------------------------------------
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# Abstract handlers.
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@ -1885,10 +1919,12 @@ class ImagePointHandler:
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# used as a mixin by point transforms (for use with im.point)
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pass
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class ImageTransformHandler:
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# used as a mixin by geometry transforms (for use with im.transform)
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pass
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# --------------------------------------------------------------------
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# Factories
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@ -1964,6 +2000,7 @@ def frombytes(mode, size, data, decoder_name="raw", *args):
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im.frombytes(data, decoder_name, args)
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return im
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def fromstring(*args, **kw):
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"""Deprecated alias to frombytes.
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@ -2168,6 +2205,7 @@ def open(fp, mode="r"):
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raise IOError("cannot identify image file %r"
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% (filename if filename else fp))
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#
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# Image processing.
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@ -2266,6 +2304,7 @@ def merge(mode, bands):
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im.putband(bands[i].im, i)
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return bands[0]._new(im)
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# --------------------------------------------------------------------
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# Plugin registry
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@ -2324,6 +2363,7 @@ def _show(image, **options):
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# override me, as necessary
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_showxv(image, **options)
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def _showxv(image, title=None, **options):
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from PIL import ImageShow
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ImageShow.show(image, title, **options)
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