Merge pull request #4850 from nulano/docs-codefmt

docs/handbook/image-file-formats.rst

@@ -257,6 +257,9 @@ Using the :py:meth:`~PIL.Image.Image.draft` method, you can speed things up by
 converting ``RGB`` images to ``L``, and resize images to 1/2, 1/4 or 1/8 of
 their original size while loading them.
 
+By default Pillow doesn't allow loading of truncated JPEG files, set
+:data:`.ImageFile.LOAD_TRUNCATED_IMAGES` to override this.
+
 The :py:meth:`~PIL.Image.open` method may set the following
 :py:attr:`~PIL.Image.Image.info` properties if available:
 
@@ -473,6 +476,9 @@ image formats, EXIF data is not guaranteed to be present in
 :py:attr:`~PIL.Image.Image.info` until :py:meth:`~PIL.Image.Image.load` has been
 called.
 
+By default Pillow doesn't allow loading of truncated PNG files, set
+:data:`.ImageFile.LOAD_TRUNCATED_IMAGES` to override this.
+
 The :py:func:`~PIL.Image.open` function sets the following
 :py:attr:`~PIL.Image.Image.info` properties, when appropriate:
 

docs/handbook/writing-your-own-file-decoder.rst

@@ -365,7 +365,7 @@ interest in this object are:
   The target image, will be set by Pillow.
 
 **state**
-  An ImagingCodecStateInstance, will be set by Pillow. The **context**
+  An ImagingCodecStateInstance, will be set by Pillow. The ``context``
   member is an opaque struct that can be used by the decoder to store
   any format specific state or options.
 

docs/reference/ImageChops.rst

@@ -39,12 +39,7 @@ operations in this module).
 .. autofunction:: PIL.ImageChops.soft_light
 .. autofunction:: PIL.ImageChops.hard_light
 .. autofunction:: PIL.ImageChops.overlay
-.. py:method:: PIL.ImageChops.offset(image, xoffset, yoffset=None)
-
-    Returns a copy of the image where data has been offset by the given
-    distances. Data wraps around the edges. If **yoffset** is omitted, it
-    is assumed to be equal to **xoffset**.
-
+.. autofunction:: PIL.ImageChops.offset
 .. autofunction:: PIL.ImageChops.screen
 .. autofunction:: PIL.ImageChops.subtract
 .. autofunction:: PIL.ImageChops.subtract_modulo

docs/reference/ImageFile.rst

@@ -52,3 +52,10 @@ Classes
 .. autoclass:: PIL.ImageFile.StubImageFile()
     :members:
     :show-inheritance:
+
+Constants
+---------
+
+.. autodata:: PIL.ImageFile.LOAD_TRUNCATED_IMAGES
+.. autodata:: PIL.ImageFile.ERRORS
+    :annotation:

docs/reference/ImageFont.rst

@@ -56,3 +56,19 @@ Methods
 
 .. autoclass:: PIL.ImageFont.TransposedFont
     :members:
+
+Constants
+---------
+
+.. data:: PIL.ImageFont.LAYOUT_BASIC
+
+    Use basic text layout for TrueType font.
+    Advanced features such as text direction are not supported.
+
+.. data:: PIL.ImageFont.LAYOUT_RAQM
+
+    Use Raqm text layout for TrueType font.
+    Advanced features are supported.
+
+    Requires Raqm, you can check support using
+    :py:func:`PIL.features.check_feature` with ``feature="raqm"``.

docs/reference/ImagePath.rst

@@ -33,7 +33,7 @@ vector data. Path objects can be passed to the methods on the
     method modifies the path in place, and returns the number of points left in
     the path.
 
-    **distance** is measured as `Manhattan distance`_ and defaults to two
+    ``distance`` is measured as `Manhattan distance`_ and defaults to two
     pixels.
 
 .. _Manhattan distance: https://en.wikipedia.org/wiki/Manhattan_distance
@@ -55,7 +55,7 @@ vector data. Path objects can be passed to the methods on the
     :param flat: By default, this function returns a list of 2-tuples
                  [(x, y), ...].  If this argument is ``True``, it
                  returns a flat list [x, y, ...] instead.
-    :return: A list of coordinates. See **flat**.
+    :return: A list of coordinates. See ``flat``.
 
 .. py:method:: PIL.ImagePath.Path.transform(matrix)
 

src/PIL/Image.py

@@ -855,7 +855,7 @@ class Image:
         and the palette can be represented without a palette.
 
         The current version supports all possible conversions between
-        "L", "RGB" and "CMYK." The **matrix** argument only supports "L"
+        "L", "RGB" and "CMYK." The ``matrix`` argument only supports "L"
         and "RGB".
 
         When translating a color image to greyscale (mode "L"),
@@ -870,9 +870,9 @@ class Image:
         all other values to 0 (black). To use other thresholds, use the
         :py:meth:`~PIL.Image.Image.point` method.
 
-        When converting from "RGBA" to "P" without a **matrix** argument,
+        When converting from "RGBA" to "P" without a ``matrix`` argument,
         this passes the operation to :py:meth:`~PIL.Image.Image.quantize`,
-        and **dither** and **palette** are ignored.
+        and ``dither`` and ``palette`` are ignored.
 
         :param mode: The requested mode. See: :ref:`concept-modes`.
         :param matrix: An optional conversion matrix.  If given, this
@@ -880,7 +880,7 @@ class Image:
         :param dither: Dithering method, used when converting from
            mode "RGB" to "P" or from "RGB" or "L" to "1".
            Available methods are :data:`NONE` or :data:`FLOYDSTEINBERG` (default).
-           Note that this is not used when **matrix** is supplied.
+           Note that this is not used when ``matrix`` is supplied.
         :param palette: Palette to use when converting from mode "RGB"
            to "P".  Available palettes are :data:`WEB` or :data:`ADAPTIVE`.
         :param colors: Number of colors to use for the :data:`ADAPTIVE` palette.
@@ -1205,7 +1205,7 @@ class Image:
     def getbands(self):
         """
         Returns a tuple containing the name of each band in this image.
-        For example, **getbands** on an RGB image returns ("R", "G", "B").
+        For example, ``getbands`` on an RGB image returns ("R", "G", "B").
 
         :returns: A tuple containing band names.
         :rtype: tuple
@@ -1259,7 +1259,7 @@ class Image:
         Note that the sequence object returned by this method is an
         internal PIL data type, which only supports certain sequence
         operations.  To convert it to an ordinary sequence (e.g. for
-        printing), use **list(im.getdata())**.
+        printing), use ``list(im.getdata())``.
 
         :param band: What band to return.  The default is to return
            all bands.  To return a single band, pass in the index
@@ -1740,7 +1740,7 @@ class Image:
         Rewrites the image to reorder the palette.
 
         :param dest_map: A list of indexes into the original palette.
-           e.g. [1,0] would swap a two item palette, and list(range(256))
+           e.g. ``[1,0]`` would swap a two item palette, and ``list(range(256))``
            is the identity transform.
         :param source_palette: Bytes or None.
         :returns:  An :py:class:`~PIL.Image.Image` object.
@@ -1922,16 +1922,16 @@ class Image:
 
     def reduce(self, factor, box=None):
         """
-        Returns a copy of the image reduced by `factor` times.
-        If the size of the image is not dividable by the `factor`,
+        Returns a copy of the image reduced ``factor`` times.
+        If the size of the image is not dividable by ``factor``,
         the resulting size will be rounded up.
 
         :param factor: A greater than 0 integer or tuple of two integers
            for width and height separately.
         :param box: An optional 4-tuple of ints providing
            the source image region to be reduced.
-           The values must be within (0, 0, width, height) rectangle.
-           If omitted or None, the entire source is used.
+           The values must be within ``(0, 0, width, height)`` rectangle.
+           If omitted or ``None``, the entire source is used.
         """
         if not isinstance(factor, (list, tuple)):
             factor = (factor, factor)
@@ -2354,7 +2354,7 @@ class Image:
                     # Return result
 
           It may also be an object with a ``method.getdata`` method
-          that returns a tuple supplying new **method** and **data** values::
+          that returns a tuple supplying new ``method`` and ``data`` values::
 
             class Example:
                 def getdata(self):
@@ -2369,7 +2369,7 @@ class Image:
            interpolation in a 4x4 environment). If omitted, or if the image
            has mode "1" or "P", it is set to :py:data:`PIL.Image.NEAREST`.
            See: :ref:`concept-filters`.
-        :param fill: If **method** is an
+        :param fill: If ``method`` is an
           :py:class:`~PIL.Image.ImageTransformHandler` object, this is one of
           the arguments passed to it. Otherwise, it is unused.
         :param fillcolor: Optional fill color for the area outside the
@@ -2668,7 +2668,7 @@ def frombuffer(mode, size, data, decoder_name="raw", *args):
 
     Note that this function decodes pixel data only, not entire images.
     If you have an entire image file in a string, wrap it in a
-    **BytesIO** object, and use :py:func:`~PIL.Image.open` to load it.
+    :py:class:`~io.BytesIO` object, and use :py:func:`~PIL.Image.open` to load it.
 
     In the current version, the default parameters used for the "raw" decoder
     differs from that used for :py:func:`~PIL.Image.frombytes`.  This is a
@@ -2715,7 +2715,7 @@ def fromarray(obj, mode=None):
     Creates an image memory from an object exporting the array interface
     (using the buffer protocol).
 
-    If **obj** is not contiguous, then the tobytes method is called
+    If ``obj`` is not contiguous, then the ``tobytes`` method is called
     and :py:func:`~PIL.Image.frombuffer` is used.
 
     If you have an image in NumPy::

src/PIL/ImageChops.py

@@ -313,8 +313,8 @@ def composite(image1, image2, mask):
 
 def offset(image, xoffset, yoffset=None):
     """Returns a copy of the image where data has been offset by the given
-    distances. Data wraps around the edges. If **yoffset** is omitted, it
-    is assumed to be equal to **xoffset**.
+    distances. Data wraps around the edges. If ``yoffset`` is omitted, it
+    is assumed to be equal to ``xoffset``.
 
     :param xoffset: The horizontal distance.
     :param yoffset: The vertical distance.  If omitted, both

src/PIL/ImageCms.py

@@ -250,7 +250,9 @@ class ImageCmsTransform(Image.ImagePointHandler):
 
 
 def get_display_profile(handle=None):
-    """ (experimental) Fetches the profile for the current display device.
+    """
+    (experimental) Fetches the profile for the current display device.
+
     :returns: ``None`` if the profile is not known.
     """
 
@@ -624,7 +626,7 @@ def applyTransform(im, transform, inPlace=False):
     :param im: An :py:class:`~PIL.Image.Image` object, and im.mode must be the same
         as the ``inMode`` supported by the transform.
     :param transform: A valid CmsTransform class object
-    :param inPlace: Bool.  If ``True``, ``im` is modified in place and ``None`` is
+    :param inPlace: Bool.  If ``True``, ``im`` is modified in place and ``None`` is
         returned, if ``False``, a new :py:class:`~PIL.Image.Image` object with the
         transform applied is returned (and ``im`` is not changed). The default is
         ``False``.

src/PIL/ImageFile.py

@@ -40,6 +40,7 @@ MAXBLOCK = 65536
 SAFEBLOCK = 1024 * 1024
 
 LOAD_TRUNCATED_IMAGES = False
+"""Whether or not to load truncated image files. User code may change this."""
 
 ERRORS = {
     -1: "image buffer overrun error",
@@ -48,6 +49,7 @@ ERRORS = {
     -8: "bad configuration",
     -9: "out of memory error",
 }
+"""Dict of known error codes returned from :meth:`.PyDecoder.decode`."""
 
 
 #
@@ -583,7 +585,7 @@ class PyCodecState:
 class PyDecoder:
     """
     Python implementation of a format decoder. Override this class and
-    add the decoding logic in the `decode` method.
+    add the decoding logic in the :meth:`decode` method.
 
     See :ref:`Writing Your Own File Decoder in Python<file-decoders-py>`
     """
@@ -615,9 +617,9 @@ class PyDecoder:
         Override to perform the decoding process.
 
         :param buffer: A bytes object with the data to be decoded.
-        :returns: A tuple of (bytes consumed, errcode).
+        :returns: A tuple of ``(bytes consumed, errcode)``.
             If finished with decoding return <0 for the bytes consumed.
-            Err codes are from `ERRORS`
+            Err codes are from :data:`.ImageFile.ERRORS`.
         """
         raise NotImplementedError()
 

src/PIL/ImageFilter.py

@@ -69,7 +69,7 @@ class Kernel(BuiltinFilter):
 class RankFilter(Filter):
     """
     Create a rank filter.  The rank filter sorts all pixels in
-    a window of the given size, and returns the **rank**'th value.
+    a window of the given size, and returns the ``rank``'th value.
 
     :param size: The kernel size, in pixels.
     :param rank: What pixel value to pick.  Use 0 for a min filter,

src/PIL/ImageFont.py

@@ -638,7 +638,7 @@ def truetype(font=None, size=10, index=0, encoding="", layout_engine=None):
                      This specifies the character set to use. It does not alter the
                      encoding of any text provided in subsequent operations.
     :param layout_engine: Which layout engine to use, if available:
-                     `ImageFont.LAYOUT_BASIC` or `ImageFont.LAYOUT_RAQM`.
+                     :data:`.ImageFont.LAYOUT_BASIC` or :data:`.ImageFont.LAYOUT_RAQM`.
 
                      You can check support for Raqm layout using
                      :py:func:`PIL.features.check_feature` with ``feature="raqm"``.

src/PIL/ImageOps.py

@@ -64,7 +64,7 @@ def _lut(image, lut):
 def autocontrast(image, cutoff=0, ignore=None):
     """
     Maximize (normalize) image contrast. This function calculates a
-    histogram of the input image, removes **cutoff** percent of the
+    histogram of the input image, removes ``cutoff`` percent of the
     lightest and darkest pixels from the histogram, and remaps the image
     so that the darkest pixel becomes black (0), and the lightest
     becomes white (255).
@@ -146,14 +146,14 @@ def colorize(image, black, white, mid=None, blackpoint=0, whitepoint=255, midpoi
     Colorize grayscale image.
     This function calculates a color wedge which maps all black pixels in
     the source image to the first color and all white pixels to the
-    second color. If **mid** is specified, it uses three-color mapping.
-    The **black** and **white** arguments should be RGB tuples or color names;
-    optionally you can use three-color mapping by also specifying **mid**.
+    second color. If ``mid`` is specified, it uses three-color mapping.
+    The ``black`` and ``white`` arguments should be RGB tuples or color names;
+    optionally you can use three-color mapping by also specifying ``mid``.
     Mapping positions for any of the colors can be specified
-    (e.g. **blackpoint**), where these parameters are the integer
+    (e.g. ``blackpoint``), where these parameters are the integer
     value corresponding to where the corresponding color should be mapped.
     These parameters must have logical order, such that
-    **blackpoint** <= **midpoint** <= **whitepoint** (if **mid** is specified).
+    ``blackpoint <= midpoint <= whitepoint`` (if ``mid`` is specified).
 
     :param image: The image to colorize.
     :param black: The color to use for black input pixels.
@@ -312,7 +312,7 @@ def deform(image, deformer, resample=Image.BILINEAR):
 
     :param image: The image to deform.
     :param deformer: A deformer object.  Any object that implements a
-                    **getmesh** method can be used.
+                    ``getmesh`` method can be used.
     :param resample: An optional resampling filter. Same values possible as
        in the PIL.Image.transform function.
     :return: An image.

src/PIL/ImageTk.py

@@ -69,7 +69,7 @@ class PhotoImage:
     image, pixels having alpha 0 are treated as transparent.
 
     The constructor takes either a PIL image, or a mode and a size.
-    Alternatively, you can use the **file** or **data** options to initialize
+    Alternatively, you can use the ``file`` or ``data`` options to initialize
     the photo image object.
 
     :param image: Either a PIL image, or a mode string.  If a mode string is
@@ -210,7 +210,7 @@ class BitmapImage:
 
     The given image must have mode "1".  Pixels having value 0 are treated as
     transparent.  Options, if any, are passed on to Tkinter.  The most commonly
-    used option is **foreground**, which is used to specify the color for the
+    used option is ``foreground``, which is used to specify the color for the
     non-transparent parts.  See the Tkinter documentation for information on
     how to specify colours.
 

src/PIL/ImageWin.py

@@ -59,7 +59,7 @@ class Dib:
     with 20 greylevels.
 
     To make sure that palettes work properly under Windows, you must call the
-    **palette** method upon certain events from Windows.
+    ``palette`` method upon certain events from Windows.
 
     :param image: Either a PIL image, or a mode string. If a mode string is
                   used, a size must also be given.  The mode can be one of "1",

src/PIL/JpegPresets.py

@@ -34,7 +34,7 @@ Possible subsampling values are 0, 1 and 2 that correspond to 4:4:4, 4:2:2 and
 4:2:0.
 
 You can get the subsampling of a JPEG with the
-`JpegImagePlugin.get_sampling(im)` function.
+:func:`.JpegImagePlugin.get_sampling` function.
 
 In JPEG compressed data a JPEG marker is used instead of an EXIF tag.
 (ref.: https://www.exiv2.org/tags.html)
@@ -64,7 +64,7 @@ The tables format between im.quantization and quantization in presets differ in
 3. The zigzag order is remove in the preset (needed by libjpeg >= 6a).
 
 You can convert the dict format to the preset format with the
-`JpegImagePlugin.convert_dict_qtables(dict_qtables)` function.
+:func:`.JpegImagePlugin.convert_dict_qtables()` function.
 
 Libjpeg ref.:
 https://web.archive.org/web/20120328125543/http://www.jpegcameras.com/libjpeg/libjpeg-3.html

src/PIL/PSDraw.py

@@ -25,7 +25,7 @@ from . import EpsImagePlugin
 
 class PSDraw:
     """
-    Sets up printing to the given file. If **fp** is omitted,
+    Sets up printing to the given file. If ``fp`` is omitted,
     :py:data:`sys.stdout` is assumed.
     """
 

src/PIL/TiffImagePlugin.py

@@ -414,7 +414,7 @@ class ImageFileDirectory_v2(MutableMapping):
 
     The tiff metadata type of each item is stored in a dictionary of
     tag types in
-    `~PIL.TiffImagePlugin.ImageFileDirectory_v2.tagtype`. The types
+    :attr:`~PIL.TiffImagePlugin.ImageFileDirectory_v2.tagtype`. The types
     are read from a tiff file, guessed from the type added, or added
     manually.
 
@@ -885,7 +885,7 @@ class ImageFileDirectory_v1(ImageFileDirectory_v2):
         ('Some Data',)
 
     Also contains a dictionary of tag types as read from the tiff image file,
-    `~PIL.TiffImagePlugin.ImageFileDirectory_v1.tagtype`.
+    :attr:`~PIL.TiffImagePlugin.ImageFileDirectory_v1.tagtype`.
 
     Values are returned as a tuple.
 
@@ -899,6 +899,10 @@ class ImageFileDirectory_v1(ImageFileDirectory_v2):
     tags = property(lambda self: self._tags_v1)
     tagdata = property(lambda self: self._tagdata)
 
+    # defined in ImageFileDirectory_v2
+    tagtype: dict
+    """Dictionary of tag types"""
+
     @classmethod
     def from_v2(cls, original):
         """ Returns an