mirror of
https://github.com/python-pillow/Pillow.git
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Merge 74514fa1f5 into 958397ae02
This commit is contained in:
Hugo
commit
971b6dc1e1
192
PIL/Image.py
192
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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@ -52,7 +53,7 @@ try:
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# directly; import Image and use the Image.core variable instead.
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from PIL import _imaging as core
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if PILLOW_VERSION != getattr(core, 'PILLOW_VERSION', None):
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raise ImportError("The _imaging extension was built for another "
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raise ImportError("The _imaging extension was built for another "
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" version of Pillow or PIL")
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except ImportError as v:
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@ -91,22 +92,26 @@ except ImportError:
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builtins = __builtin__
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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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from PIL._binary import i8
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from PIL._util import isPath
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from PIL._util import isStringType
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from PIL._util import 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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import numbers
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# works everywhere, win for pypy, not cpython
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USE_CFFI_ACCESS = hasattr(sys, 'pypy_version_info')
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USE_CFFI_ACCESS = hasattr(sys, 'pypy_version_info')
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try:
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import cffi
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HAS_CFFI=True
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HAS_CFFI = True
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except:
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HAS_CFFI=False
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HAS_CFFI = False
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def isImageType(t):
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"""
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@ -148,16 +153,16 @@ MESH = 4
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# resampling filters
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NONE = 0
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NEAREST = 0
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ANTIALIAS = 1 # 3-lobed lanczos
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ANTIALIAS = 1 # 3-lobed lanczos
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LINEAR = BILINEAR = 2
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CUBIC = BICUBIC = 3
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# dithers
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NONE = 0
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NEAREST = 0
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ORDERED = 1 # Not yet implemented
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RASTERIZE = 2 # Not yet implemented
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FLOYDSTEINBERG = 3 # default
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ORDERED = 1 # Not yet implemented
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RASTERIZE = 2 # Not yet implemented
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FLOYDSTEINBERG = 3 # default
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# palettes/quantizers
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WEB = 0
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@ -222,7 +227,7 @@ else:
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_MODE_CONV = {
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# official modes
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"1": ('|b1', None), # broken
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"1": ('|b1', None), # broken
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"L": ('|u1', None),
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"I": (_ENDIAN + 'i4', None),
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"F": (_ENDIAN + 'f4', None),
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@ -232,8 +237,8 @@ _MODE_CONV = {
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"RGBA": ('|u1', 4),
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"CMYK": ('|u1', 4),
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"YCbCr": ('|u1', 3),
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"LAB": ('|u1', 3), # UNDONE - unsigned |u1i1i1
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# I;16 == I;16L, and I;32 == I;32L
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"LAB": ('|u1', 3), # UNDONE - unsigned |u1i1i1
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# I;16 == I;16L, and I;32 == I;32L
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"I;16": ('<u2', None),
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"I;16B": ('>u2', None),
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"I;16L": ('<u2', None),
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@ -248,6 +253,7 @@ _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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@ -368,8 +374,8 @@ def init():
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for plugin in _plugins:
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try:
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if DEBUG:
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print ("Importing %s"%plugin)
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__import__("PIL.%s"%plugin, globals(), locals(), [])
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print ("Importing %s" % plugin)
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__import__("PIL.%s" % plugin, globals(), locals(), [])
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except ImportError:
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if DEBUG:
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print("Image: failed to import", end=' ')
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@ -379,6 +385,7 @@ 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 +405,7 @@ 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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@ -421,30 +429,36 @@ 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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try:
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(a, b, c) = data # simplified syntax
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(a, b, c) = data # simplified syntax
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if (a is stub and b == "__mul__" and isinstance(c, numbers.Number)):
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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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((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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@ -495,14 +509,15 @@ class Image:
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new.info[k] = v
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return new
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_makeself = _new # compatibility
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_makeself = _new # compatibility
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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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def close(self):
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"""
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Closes the file pointer, if possible.
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@ -518,13 +533,12 @@ class Image:
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self.fp.close()
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except Exception as msg:
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if Image.DEBUG:
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print ("Error closing: %s" %msg)
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print ("Error closing: %s" % msg)
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# Instead of simply setting to None, we're setting up a
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# deferred error that will better explain that the core 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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@ -533,14 +547,15 @@ 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 os
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import tempfile
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suffix = ''
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if format:
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suffix = '.'+format
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if not file:
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f, file = tempfile.mkstemp(suffix)
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os.close(f)
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self.load()
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if not format or format == "PPM":
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self.im.save_ppm(file)
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@ -591,7 +606,7 @@ class Image:
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e = _getencoder(self.mode, encoder_name, args)
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e.setimage(self.im)
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bufsize = max(65536, self.size[0] * 4) # see RawEncode.c
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bufsize = max(65536, self.size[0] * 4) # see RawEncode.c
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data = []
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while True:
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@ -663,7 +678,9 @@ 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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@ -672,7 +689,7 @@ class Image:
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normal cases, you don't need to call this method, since the
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Image class automatically loads an opened image when it is
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accessed for the first time. This method will close the file
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associated with the image.
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associated with the image.
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:returns: An image access object.
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"""
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@ -777,33 +794,32 @@ class Image:
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if "transparency" in self.info and 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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# color to an alpha channel.
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return self._new(self.im.convert_transparent(
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mode, self.info['transparency']))
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mode, self.info['transparency']))
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elif self.mode in ('L', 'RGB', 'P') and mode in ('L', 'RGB', 'P'):
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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('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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# get the new transparency color.
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# use existing conversions
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trns_im = Image()._new(core.new(self.mode, (1,1)))
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trns_im = Image()._new(core.new(self.mode, (1, 1)))
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if self.mode == 'P':
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trns_im.putpalette(self.palette)
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trns_im.putpixel((0,0), t)
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trns_im.putpixel((0, 0), t)
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if mode in ('L','RGB'):
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if mode in ('L', 'RGB'):
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trns_im = trns_im.convert(mode)
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else:
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# can't just retrieve the palette number, got to do it
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# after quantization.
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# after quantization.
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trns_im = trns_im.convert('RGB')
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trns = trns_im.getpixel((0,0))
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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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@ -811,7 +827,7 @@ class Image:
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new.palette = ImagePalette.raw("RGB", new.im.getpalette("RGB"))
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if delete_trns:
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# This could possibly happen if we requantize to fewer colors.
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# The transparency would be totally off in that case.
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# The transparency would be totally off in that case.
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del(new.info['transparency'])
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if trns is not None:
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try:
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|
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@ -826,7 +842,7 @@ class Image:
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# colorspace conversion
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if dither is None:
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dither = FLOYDSTEINBERG
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try:
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im = self.im.convert(mode, dither)
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except ValueError:
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|
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@ -839,7 +855,7 @@ class Image:
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new_im = self._new(im)
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if delete_trns:
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#crash fail if we leave a bytes transparency in an rgb/l mode.
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# crash fail if we leave a bytes transparency in an rgb/l mode.
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del(new_im.info['transparency'])
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if trns is not None:
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if new_im.mode == 'P':
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|
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@ -863,7 +879,7 @@ class Image:
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# quantizer interface in a later version of PIL.
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self.load()
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|
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if method is None:
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# defaults:
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method = 0
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|
|
@ -871,10 +887,10 @@ class Image:
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method = 2
|
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|
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if self.mode == 'RGBA' and method != 2:
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# Caller specified an invalid mode.
|
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# Caller specified an invalid mode.
|
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raise ValueError('Fast Octree (method == 2) is the ' +
|
||||
' only valid method for quantizing RGBA images')
|
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|
||||
|
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if palette:
|
||||
# use palette from reference image
|
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palette.load()
|
||||
|
|
@ -928,7 +944,7 @@ class Image:
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|||
def draft(self, mode, size):
|
||||
"""
|
||||
NYI
|
||||
|
||||
|
||||
Configures the image file loader so it returns a version of the
|
||||
image that as closely as possible matches the given mode and
|
||||
size. For example, you can use this method to convert a color
|
||||
|
|
@ -1019,7 +1035,7 @@ class Image:
|
|||
return out
|
||||
return self.im.getcolors(maxcolors)
|
||||
|
||||
def getdata(self, band = None):
|
||||
def getdata(self, band=None):
|
||||
"""
|
||||
Returns the contents of this image as a sequence object
|
||||
containing pixel values. The sequence object is flattened, so
|
||||
|
|
@ -1040,7 +1056,7 @@ class Image:
|
|||
self.load()
|
||||
if band is not None:
|
||||
return self.im.getband(band)
|
||||
return self.im # could be abused
|
||||
return self.im # could be abused
|
||||
|
||||
def getextrema(self):
|
||||
"""
|
||||
|
|
@ -1070,7 +1086,6 @@ class Image:
|
|||
self.load()
|
||||
return self.im.ptr
|
||||
|
||||
|
||||
def getpalette(self):
|
||||
"""
|
||||
Returns the image palette as a list.
|
||||
|
|
@ -1086,8 +1101,7 @@ class Image:
|
|||
else:
|
||||
return list(self.im.getpalette())
|
||||
except ValueError:
|
||||
return None # no palette
|
||||
|
||||
return None # no palette
|
||||
|
||||
def getpixel(self, xy):
|
||||
"""
|
||||
|
|
@ -1209,7 +1223,8 @@ class Image:
|
|||
|
||||
if isImageType(box) and mask is None:
|
||||
# abbreviated paste(im, mask) syntax
|
||||
mask = box; box = None
|
||||
mask = box
|
||||
box = None
|
||||
|
||||
if box is None:
|
||||
# cover all of self
|
||||
|
|
@ -1277,7 +1292,7 @@ class Image:
|
|||
if self.mode in ("I", "I;16", "F"):
|
||||
# check if the function can be used with point_transform
|
||||
# UNDONE wiredfool -- I think this prevents us from ever doing
|
||||
# a gamma function point transform on > 8bit images.
|
||||
# a gamma function point transform on > 8bit images.
|
||||
scale, offset = _getscaleoffset(lut)
|
||||
return self._new(self.im.point_transform(scale, offset))
|
||||
# for other modes, convert the function to a table
|
||||
|
|
@ -1315,7 +1330,7 @@ class Image:
|
|||
# do things the hard way
|
||||
im = self.im.convert(mode)
|
||||
if im.mode not in ("LA", "RGBA"):
|
||||
raise ValueError # sanity check
|
||||
raise ValueError # sanity check
|
||||
self.im = im
|
||||
self.pyaccess = None
|
||||
self.mode = self.im.mode
|
||||
|
|
@ -1393,7 +1408,7 @@ class Image:
|
|||
self.mode = "P"
|
||||
self.palette = palette
|
||||
self.palette.mode = "RGB"
|
||||
self.load() # install new palette
|
||||
self.load() # install new palette
|
||||
|
||||
def putpixel(self, xy, value):
|
||||
"""
|
||||
|
|
@ -1420,9 +1435,9 @@ class Image:
|
|||
self._copy()
|
||||
self.pyaccess = None
|
||||
self.load()
|
||||
|
||||
if self.pyaccess:
|
||||
return self.pyaccess.putpixel(xy,value)
|
||||
|
||||
if self.pyaccess:
|
||||
return self.pyaccess.putpixel(xy, value)
|
||||
return self.im.putpixel(xy, value)
|
||||
|
||||
def resize(self, size, resample=NEAREST):
|
||||
|
|
@ -1492,6 +1507,7 @@ class Image:
|
|||
math.cos(angle), math.sin(angle), 0.0,
|
||||
-math.sin(angle), math.cos(angle), 0.0
|
||||
]
|
||||
|
||||
def transform(x, y, matrix=matrix):
|
||||
(a, b, c, d, e, f) = matrix
|
||||
return a*x + b*y + c, d*x + e*y + f
|
||||
|
|
@ -1579,13 +1595,13 @@ class Image:
|
|||
try:
|
||||
format = EXTENSION[ext]
|
||||
except KeyError:
|
||||
raise KeyError(ext) # unknown extension
|
||||
raise KeyError(ext) # unknown extension
|
||||
|
||||
try:
|
||||
save_handler = SAVE[format.upper()]
|
||||
except KeyError:
|
||||
init()
|
||||
save_handler = SAVE[format.upper()] # unknown format
|
||||
save_handler = SAVE[format.upper()] # unknown format
|
||||
|
||||
if isPath(fp):
|
||||
fp = builtins.open(fp, "wb")
|
||||
|
|
@ -1667,7 +1683,7 @@ class Image:
|
|||
"""
|
||||
return 0
|
||||
|
||||
def thumbnail(self, size, resample=NEAREST):
|
||||
def thumbnail(self, size, resample=ANTIALIAS):
|
||||
"""
|
||||
Make this image into a thumbnail. This method modifies the
|
||||
image to contain a thumbnail version of itself, no larger than
|
||||
|
|
@ -1682,26 +1698,27 @@ class Image:
|
|||
important than quality.
|
||||
|
||||
Also note that this function modifies the :py:class:`~PIL.Image.Image`
|
||||
object in place. If you need to use the full resolution image as well, apply
|
||||
this method to a :py:meth:`~PIL.Image.Image.copy` of the original image.
|
||||
object in place. If you need to use the full resolution image as well,
|
||||
apply this method to a :py:meth:`~PIL.Image.Image.copy` of the original
|
||||
image.
|
||||
|
||||
:param size: Requested size.
|
||||
:param resample: Optional resampling filter. This can be one
|
||||
of :py:attr:`PIL.Image.NEAREST`, :py:attr:`PIL.Image.BILINEAR`,
|
||||
:py:attr:`PIL.Image.BICUBIC`, or :py:attr:`PIL.Image.ANTIALIAS`
|
||||
(best quality). If omitted, it defaults to
|
||||
:py:attr:`PIL.Image.NEAREST` (this will be changed to ANTIALIAS in a
|
||||
future version).
|
||||
:py:attr:`PIL.Image.ANTIALIAS`.
|
||||
:returns: None
|
||||
"""
|
||||
|
||||
# FIXME: the default resampling filter will be changed
|
||||
# to ANTIALIAS in future versions
|
||||
|
||||
# preserve aspect ratio
|
||||
x, y = self.size
|
||||
if x > size[0]: y = int(max(y * size[0] / x, 1)); x = int(size[0])
|
||||
if y > size[1]: x = int(max(x * size[1] / y, 1)); y = int(size[1])
|
||||
if x > size[0]:
|
||||
y = int(max(y * size[0] / x, 1))
|
||||
x = int(size[0])
|
||||
if y > size[1]:
|
||||
x = int(max(x * size[1] / y, 1))
|
||||
y = int(size[1])
|
||||
size = x, y
|
||||
|
||||
if size == self.size:
|
||||
|
|
@ -1716,7 +1733,7 @@ class Image:
|
|||
except ValueError:
|
||||
if resample != ANTIALIAS:
|
||||
raise
|
||||
im = self.resize(size, NEAREST) # fallback
|
||||
im = self.resize(size, NEAREST) # fallback
|
||||
|
||||
self.im = im.im
|
||||
self.mode = im.mode
|
||||
|
|
@ -1752,7 +1769,9 @@ class Image:
|
|||
"""
|
||||
|
||||
if self.mode == 'RGBA':
|
||||
return self.convert('RGBa').transform(size, method, data, resample, fill).convert('RGBA')
|
||||
return self.convert('RGBa') \
|
||||
.transform(size, method, data, resample, fill) \
|
||||
.convert('RGBA')
|
||||
|
||||
if isinstance(method, ImageTransformHandler):
|
||||
return method.transform(size, self, resample=resample, fill=fill)
|
||||
|
|
@ -1799,8 +1818,13 @@ class Image:
|
|||
elif method == QUAD:
|
||||
# quadrilateral warp. data specifies the four corners
|
||||
# given as NW, SW, SE, and NE.
|
||||
nw = data[0:2]; sw = data[2:4]; se = data[4:6]; ne = data[6:8]
|
||||
x0, y0 = nw; As = 1.0 / w; At = 1.0 / h
|
||||
nw = data[0:2]
|
||||
sw = data[2:4]
|
||||
se = data[4:6]
|
||||
ne = data[6:8]
|
||||
x0, y0 = nw
|
||||
As = 1.0 / w
|
||||
At = 1.0 / h
|
||||
data = (x0, (ne[0]-x0)*As, (sw[0]-x0)*At,
|
||||
(se[0]-sw[0]-ne[0]+x0)*As*At,
|
||||
y0, (ne[1]-y0)*As, (sw[1]-y0)*At,
|
||||
|
|
@ -1834,6 +1858,7 @@ class Image:
|
|||
im = self.im.transpose(method)
|
||||
return self._new(im)
|
||||
|
||||
|
||||
# --------------------------------------------------------------------
|
||||
# Lazy operations
|
||||
|
||||
|
|
@ -1869,6 +1894,7 @@ class _ImageCrop(Image):
|
|||
# FIXME: future versions should optimize crop/paste
|
||||
# sequences!
|
||||
|
||||
|
||||
# --------------------------------------------------------------------
|
||||
# Abstract handlers.
|
||||
|
||||
|
|
@ -1876,10 +1902,12 @@ class ImagePointHandler:
|
|||
# used as a mixin by point transforms (for use with im.point)
|
||||
pass
|
||||
|
||||
|
||||
class ImageTransformHandler:
|
||||
# used as a mixin by geometry transforms (for use with im.transform)
|
||||
pass
|
||||
|
||||
|
||||
# --------------------------------------------------------------------
|
||||
# Factories
|
||||
|
||||
|
|
@ -1955,6 +1983,7 @@ def frombytes(mode, size, data, decoder_name="raw", *args):
|
|||
im.frombytes(data, decoder_name, args)
|
||||
return im
|
||||
|
||||
|
||||
def fromstring(*args, **kw):
|
||||
"""Deprecated alias to frombytes.
|
||||
|
||||
|
|
@ -2017,9 +2046,9 @@ def frombuffer(mode, size, data, decoder_name="raw", *args):
|
|||
" frombuffer(mode, size, data, 'raw', mode, 0, 1)",
|
||||
RuntimeWarning, stacklevel=2
|
||||
)
|
||||
args = mode, 0, -1 # may change to (mode, 0, 1) post-1.1.6
|
||||
args = mode, 0, -1 # may change to (mode, 0, 1) post-1.1.6
|
||||
if args[0] in _MAPMODES:
|
||||
im = new(mode, (1,1))
|
||||
im = new(mode, (1, 1))
|
||||
im = im._new(
|
||||
core.map_buffer(data, size, decoder_name, None, 0, args)
|
||||
)
|
||||
|
|
@ -2139,8 +2168,8 @@ def open(fp, mode="r"):
|
|||
fp.seek(0)
|
||||
return factory(fp, filename)
|
||||
except (SyntaxError, IndexError, TypeError):
|
||||
#import traceback
|
||||
#traceback.print_exc()
|
||||
# import traceback
|
||||
# traceback.print_exc()
|
||||
pass
|
||||
|
||||
if init():
|
||||
|
|
@ -2152,13 +2181,14 @@ def open(fp, mode="r"):
|
|||
fp.seek(0)
|
||||
return factory(fp, filename)
|
||||
except (SyntaxError, IndexError, TypeError):
|
||||
#import traceback
|
||||
#traceback.print_exc()
|
||||
# import traceback
|
||||
# traceback.print_exc()
|
||||
pass
|
||||
|
||||
raise IOError("cannot identify image file %r"
|
||||
% (filename if filename else fp))
|
||||
|
||||
|
||||
#
|
||||
# Image processing.
|
||||
|
||||
|
|
@ -2257,6 +2287,7 @@ def merge(mode, bands):
|
|||
im.putband(bands[i].im, i)
|
||||
return bands[0]._new(im)
|
||||
|
||||
|
||||
# --------------------------------------------------------------------
|
||||
# Plugin registry
|
||||
|
||||
|
|
@ -2315,6 +2346,7 @@ def _show(image, **options):
|
|||
# override me, as necessary
|
||||
_showxv(image, **options)
|
||||
|
||||
|
||||
def _showxv(image, title=None, **options):
|
||||
from PIL import ImageShow
|
||||
ImageShow.show(image, title, **options)
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user