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wiredfool 2017-02-23 02:20:25 -08:00
parent c2cd5fe3d1
commit 38f43c1e5f
4 changed files with 14 additions and 15 deletions
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2
PIL/ImageFile.py
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@ -619,7 +619,7 @@ class PyDecoder(object):
self.state.ysize = y1 - y0 self.state.ysize = y1 - y0
if self.state.xsize <= 0 or self.state.ysize <= 0: if self.state.xsize <= 0 or self.state.ysize <= 0:
raise ValueError("Size Cannot be Negative") raise ValueError("Size cannot be negative")
if (self.state.xsize + self.state.xoff > self.im.size[0] or if (self.state.xsize + self.state.xoff > self.im.size[0] or
self.state.ysize + self.state.yoff > self.im.size[1]): self.state.ysize + self.state.yoff > self.im.size[1]):

1
PIL/MspImagePlugin.py
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@ -113,7 +113,6 @@ class MspDecoder(ImageFile.PyDecoder):
img = io.BytesIO() img = io.BytesIO()
blank_line = bytearray((0xff,)*((self.state.xsize+7)//8)) blank_line = bytearray((0xff,)*((self.state.xsize+7)//8))
try: try:
last_pos = 0
self.fd.seek(32) self.fd.seek(32)
rowmap = struct.unpack_from("<%dH" % (self.state.ysize), rowmap = struct.unpack_from("<%dH" % (self.state.ysize),
self.fd.read(self.state.ysize*2)) self.fd.read(self.state.ysize*2))

2
Tests/test_file_msp.py
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@ -1,6 +1,6 @@
from helper import unittest, PillowTestCase, hopper from helper import unittest, PillowTestCase, hopper
from PIL import Image, ImageFile, MspImagePlugin from PIL import Image, MspImagePlugin
import os import os

8
docs/handbook/writing-your-own-file-decoder.rst
View File

@ -26,14 +26,14 @@ Pillow decodes files in 2 stages:
called, which sets up a decoder for each tile and feeds the data to called, which sets up a decoder for each tile and feeds the data to
it. it.
A image plug-in should contain a format handler derived from the An image plug-in should contain a format handler derived from the
:py:class:`PIL.ImageFile.ImageFile` base class. This class should :py:class:`PIL.ImageFile.ImageFile` base class. This class should
provide an :py:meth:`_open` method, which reads the file header and provide an :py:meth:`_open` method, which reads the file header and
sets up at least the :py:attr:`~PIL.Image.Image.mode` and sets up at least the :py:attr:`~PIL.Image.Image.mode` and
:py:attr:`~PIL.Image.Image.size` attributes. To be able to load the :py:attr:`~PIL.Image.Image.size` attributes. To be able to load the
file, the method must also create a list of :py:attr:`tile` file, the method must also create a list of :py:attr:`tile`
descriptors, which contain a decoder name, extents of the tile, and descriptors, which contain a decoder name, extents of the tile, and
any decoder specific data. The format handler class must be explicitly any decoder-specific data. The format handler class must be explicitly
registered, via a call to the :py:mod:`~PIL.Image` module. registered, via a call to the :py:mod:`~PIL.Image` module.
.. note:: For performance reasons, it is important that the .. note:: For performance reasons, it is important that the
@ -403,8 +403,8 @@ Python file decoders should derive from
:py:class:`PIL.ImageFile.PyDecoder` and should at least override the :py:class:`PIL.ImageFile.PyDecoder` and should at least override the
decode method. File decoders should be registered using decode method. File decoders should be registered using
:py:meth:`PIL.Image.register_decoder`. As in the C implementation of :py:meth:`PIL.Image.register_decoder`. As in the C implementation of
the file decoders, there are three stages in the lifetime of a Python the file decoders, there are three stages in the lifetime of a
based file decoder: Python-based file decoder:
1. Setup: Pillow looks for the decoder in the registry, then 1. Setup: Pillow looks for the decoder in the registry, then
instantiates the class. instantiates the class.