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The Python Imaging Library
$Id: CHANGES 2934 2006-12-03 12:14:00Z fredrik $
ACKNOWLEDGEMENTS: PIL wouldn't be what it is without the help of,
among others: David Ascher, Phil Austin, Douglas Bagnall, Larry Bates,
Anthony Baxter, William Baxter, Denis Benoit, Jan Blom, Duncan Booth,
Jeff Breidenbach, Roger Burnham, Gene Cash, Kevin Cazabon, Fred Clare,
Greg Coats, Chris Cogdon, Greg Couch, Bill Crutchfield, Abel Deuring,
Tim Docker, Fred Drake, Graham Dumpleton, Matthew Ellis, Eric
Etheridge, Robin Friedrich, Pier Paolo Glave, Federico Di Gregorio,
Markus Gritsch, Daniel Haertle, Greg Hamilton, Mark Hammond, Bernhard
Herzog, Rob Hooft, Bob Ippolito, Jack Jansen, Bill Janssen, Edward
Jones, Richard Jones, Håkan Karlsson, Robert Kern, David Kirtley, Bob
Klimek, Matthias Klose, Andrew Kuchling, Magnus Källström, Victor
Lacina, Ben Last, Hamish Lawson, Cesare Leonardi, Andrew MacIntyre,
Jan Matejek, Naveen Michaud-Agrawal, Gordon McMillan, Skip Montanaro,
Fredrik Nehr, Russell Nelson, Luciano Nocera, Travis Oliphant, Piet
van Oostrum, Richard Oudkerk, Paul Pharr, Andres Polit, Eric Raymond,
Victor Reijs, Bertil Reinhammar, Nicholas Riley, Don Rozenberg, Toby
Sargeant, Barry Scott, Les Schaffer, Joel Shprentz, Klamer Shutte,
Gene Skonicki, Niki Spahiev, D. Alan Stewart, Perry Stoll, Paul
Svensson, Ulrik Svensson, Miki Tebeka, Ivan Tkatchev, Dan Torop, Adam
Twardoch, Rune Uhlin, Dmitry Vasiliev, Sasha Voynow, Charles Waldman,
Dan Wolfe, and Ka-Ping Yee.
*** Changes from release 1.1.5 to 1.1.6 ***
(1.1.6 released)
+ Fixed some 64-bit compatibility warnings for Python 2.5.
+ Added threading support for the Sane driver (from Abel Deuring).
(1.1.6b2 released)
+ Added experimental "floodfill" function to the ImageDraw module
(based on code by Eric Raymond).
+ The default arguments for "frombuffer" doesn't match "fromstring"
and the documentation; this is a bug, and will most likely be fixed
in a future version. In this release, PIL prints a warning message
instead. To silence the warning, change any calls of the form
"frombuffer(mode, size, data)" to
frombuffer(mode, size, data, "raw", mode, 0, 1)
+ Added "fromarray" function, which takes an object implementing the
NumPy array interface and creates a PIL Image from it. (from Travis
Oliphant).
+ Added NumPy array interface support (__array_interface__) to the
Image class (based on code by Travis Oliphant).
This allows you to easily convert between PIL image memories and
NumPy arrays:
import numpy, Image
im = Image.open('lena.jpg')
a = numpy.asarray(im) # a is readonly
im = Image.fromarray(a)
+ Fixed CMYK polarity for JPEG images, by treating all images as
"Adobe CMYK" images. (thanks to Cesare Leonardi and Kevin Cazabon
for samples, debugging, and patches).
(1.1.6b1 released)
+ Added 'expand' option to the Image 'rotate' method. If true, the
output image is made large enough to hold the entire rotated image.
+ Changed the ImageDraw 'line' method to always draw the last pixel in
a polyline, independent of line angle.
+ Fixed bearing calculation and clipping in the ImageFont truetype
renderer; this could lead to clipped text, or crashes in the low-
level _imagingft module. (based on input from Adam Twardoch and
others).
+ Added ImageQt wrapper module, for converting PIL Image objects to
QImage objects in an efficient way.
+ Fixed 'getmodebands' to return the number of bands also for "PA"
and "LA" modes. Added 'getmodebandnames' helper that return the
band names.
(1.1.6a2 released)
+ Added float/double support to the TIFF loader (from Russell
Nelson).
+ Fixed broken use of realloc() in path.c (from Jan Matejek)
+ Added save support for Spider images (from William Baxter).
+ Fixed broken 'paste' and 'resize' operations in pildriver
(from Bill Janssen).
+ Added support for duplex scanning to the Sane interface (Abel
Deuring).
(1.1.6a1 released)
+ Fixed a memory leak in "convert(mode)", when converting from
L to P.
+ Added pixel access object. The "load" method now returns a
access object that can be used to directly get and set pixel
values, using ordinary [x, y] notation:
pixel = im.load()
v = pixel[x, y]
pixel[x, y] = v
If you're accessing more than a few pixels, this is a lot
faster than using getpixel/putpixel.
+ Fixed building on Cygwin (from Miki Tebeka).
+ Fixed "point(callable)" on unloaded images (reported by Håkan
Karlsson).
+ Fixed size bug in ImageWin.ImageWindow constructor (from Victor
Reijs)
+ Fixed ImageMath float() and int() operations for Python 2.4
(reported by Don Rozenberg).
+ Fixed "RuntimeError: encoder error -8 in tostring" problem for
wide "RGB", "I", and "F" images.
+ Fixed line width calculation.
(1.1.6a0 released)
+ Fixed byte order issue in Image.paste(ink) (from Ka-Ping Yee).
+ Fixed off-by-0.5 errors in the ANTIALIAS code (based on input
from Douglas Bagnall).
+ Added buffer interface support to the Path constructor. If
a buffer is provided, it is assumed to contain a flat array
of float coordinates (e.g. array.array('f', seq)).
+ Added new ImageMath module.
+ Fixed ImageOps.equalize when used with a small number of distinct
values (reported by David Kirtley).
+ Fixed potential integer division in PSDraw.image (from Eric Etheridge).
*** Changes from release 1.1 to 1.1.5 ***
(1.1.5c2 and 1.1.5 final released)
+ Added experimental PERSPECTIVE transform method (from Jeff Breiden-
bach).
(1.1.5c1 released)
+ Make sure "thumbnail" never generates zero-wide or zero-high images
(reported by Gene Skonicki)
+ Fixed a "getcolors" bug that could result in a zero count for some
colors (reported by Richard Oudkerk).
+ Changed default "convert" palette to avoid "rounding errors" when
round-tripping white source pixels (reported by Henryk Gerlach and
Jeff Epler).
(1.1.5b3 released)
+ Don't crash in "quantize" method if the number of colors requested
is larger than 256. This release raises a ValueError exception;
future versions may return a mode "RGB" image instead (reported
by Richard Oudkerk).
+ Added WBMP read/write support (based on code by Duncan Booth).
(1.1.5b2 released)
+ Added DPI read/write support to the PNG codec. The decoder sets
the info["dpi"] attribute for PNG files with appropriate resolution
settings. The encoder uses the "dpi" option (based on code by Niki
Spahiev).
+ Added limited support for "point" mappings from mode "I" to mode "L".
Only 16-bit values are supported (other values are clipped), the lookup
table must contain exactly 65536 entries, and the mode argument must be
set to "L".
+ Added support for Mac OS X icns files (based on code by Bob Ippolito).
+ Added "ModeFilter" support to the ImageFilter module.
+ Added support for Spider images (from William Baxter). See the
comments in PIL/SpiderImagePlugin.py for more information on this
format.
(1.1.5b1 released)
+ Added new Sane release (from Ralph Heinkel). See the Sane/README
and Sane/CHANGES files for more information.
+ Added experimental PngInfo chunk container to the PngImageFile
module. This can be used to add arbitrary chunks to a PNG file.
Create a PngInfo instance, use "add" or "add_text" to add chunks,
and pass the instance as the "pnginfo" option when saving the
file.
+ Added "getpalette" method. This returns the palette as a list,
or None if the image has no palette. To modify the palette, use
"getpalette" to fetch the current palette, modify the list, and
put it back using "putpalette".
+ Added optional flattening to the ImagePath "tolist" method.
tolist() or tolist(0) returns a list of 2-tuples, as before.
tolist(1) returns a flattened list instead.
(1.1.5a5 released)
+ Fixed BILINEAR/BICUBIC/ANTIALIAS filtering for mode "LA".
+ Added "getcolors()" method. This is similar to the existing histo-
gram method, but looks at color values instead of individual layers,
and returns an unsorted list of (count, color) tuples.
By default, the method returns None if finds more than 256 colors.
If you need to look for more colors, you can pass in a limit (this
is used to allocate internal tables, so you probably don't want to
pass in too large values).
+ Build improvements: Fixed building under AIX, improved detection of
FreeType2 and Mac OS X framework libraries, and more. Many thanks
to everyone who helped test the new "setup.py" script!
(1.1.5a4 released)
+ The "save" method now looks for a file format driver before
creating the file.
+ Don't use antialiased truetype fonts when drawing in mode "P", "I",
and "F" images.
+ Rewrote the "setup.py" file. The new version scans for available
support libraries, and configures both the libImaging core library
and the bindings in one step.
To use specific versions of the libraries, edit the ROOT variables
in the setup.py file.
+ Removed threaded "show" viewer; use the old "show" implementation
instead (Windows).
+ Added deprecation warnings to Image.offset, ImageDraw.setink, and
ImageDraw.setfill.
+ Added width option to ImageDraw.line(). The current implementation
works best for straight lines; it does not support line joins, so
polylines won't look good.
+ ImageDraw.Draw is now a factory function instead of a class. If
you need to create custom draw classes, inherit from the ImageDraw
class. All other code should use the factory function.
+ Fixed loading of certain PCX files (problem reported by Greg
Hamilton, who also provided samples).
+ Changed _imagingft.c to require FreeType 2.1 or newer. The
module can still be built with earlier versions; see comments
in _imagingft.c for details.
(1.1.5a3 released)
+ Added 'getim' method, which returns a PyCObject wrapping an
Imaging pointer. The description string is set to IMAGING_MAGIC.
See Imaging.h for pointer and string declarations.
+ Fixed reading of TIFF JPEG images (problem reported by Ulrik
Svensson).
+ Made ImageColor work under Python 1.5.2
+ Fixed division by zero "equalize" on very small images (from
Douglas Bagnall).
(1.1.5a2 released)
+ The "paste" method now supports the alternative "paste(im, mask)"
syntax (in this case, the box defaults to im's bounding box).
+ The "ImageFile.Parser" class now works also for PNG files with
more than one IDAT block.
+ Added DPI read/write to the TIFF codec, and fixed writing of
rational values. The decoder sets the info["dpi"] attribute
for TIFF files with appropriate resolution settings. The
encoder uses the "dpi" option.
+ Disable interlacing for small (or narrow) GIF images, to
work around what appears to be a hard-to-find bug in PIL's
GIF encoder.
+ Fixed writing of mode "P" PDF images. Made mode "1" PDF
images smaller.
+ Made the XBM reader a bit more robust; the file may now start
with a few whitespace characters.
+ Added support for enhanced metafiles to the WMF driver. The
separate PILWMF kit lets you render both placeable WMF files
and EMF files as raster images. See
http://effbot.org/downloads#pilwmf
(1.1.5a1 released)
+ Replaced broken WMF driver with a WMF stub plugin (see below).
+ Fixed writing of mode "1", "L", and "CMYK" PDF images (based on
input from Nicholas Riley and others).
+ Fixed adaptive palette conversion for zero-width or zero-height
images (from Chris Cogdon)
+ Fixed reading of PNG images from QuickTime 6 (from Paul Pharr)
+ Added support for StubImageFile plugins, including stub plugins
for BUFR, FITS, GRIB, and HDF5 files. A stub plugin can identify
a given file format, but relies on application code to open and
save files in that format.
+ Added optional "encoding" argument to the ImageFont.truetype
factory. This argument can be used to specify non-Unicode character
maps for fonts that support that. For example, to draw text using
the Microsoft Symbol font, use:
font = ImageFont.truetype("symbol.ttf", 16, encoding="symb")
draw.text((0, 0), unichr(0xF000 + 0xAA))
(note that the symbol font uses characters in the 0xF000-0xF0FF
range)
Common encodings are "unic" (Unicode), "symb" (Microsoft Symbol),
"ADOB" (Adobe Standard), "ADBE" (Adobe Expert), and "armn" (Apple
Roman). See the FreeType documentation for more information.
+ Made "putalpha" a bit more robust; you can now attach an alpha
layer to a plain "L" or "RGB" image, and you can also specify
constant alphas instead of alpha layers (using integers or colour
names).
+ Added experimental "LA" mode support.
An "LA" image is an "L" image with an attached transparency layer.
Note that support for "LA" is not complete; some operations may
fail or produce unexpected results.
+ Added "RankFilter", "MinFilter", "MedianFilter", and "MaxFilter"
classes to the ImageFilter module.
+ Improved support for applications using multiple threads; PIL
now releases the global interpreter lock for many CPU-intensive
operations (based on work by Kevin Cazabon).
+ Ignore Unicode characters in the PCF loader (from Andres Polit)
+ Fixed typo in OleFileIO.loadfat, which could affect loading of
FlashPix and Image Composer images (Daniel Haertle)
+ Fixed building on platforms that have Freetype but don't have
Tcl/Tk (Jack Jansen, Luciano Nocera, Piet van Oostrum and others)
+ Added EXIF GPSInfo read support for JPEG files. To extract
GPSInfo information, open the file, extract the exif dictionary,
and check for the key 0x8825 (GPSInfo). If present, it contains
a dictionary mapping GPS keys to GPS values. For a list of keys,
see the EXIF specification.
The "ExifTags" module contains a GPSTAGS dictionary mapping GPS
tags to tag names.
+ Added DPI read support to the PCX and DCX codecs (info["dpi"]).
+ The "show" methods now uses a built-in image viewer on Windows.
This viewer creates an instance of the ImageWindow class (see
below) and keeps it running in a separate thread. NOTE: This
was disabled in 1.1.5a4.
+ Added experimental "Window" and "ImageWindow" classes to the
ImageWin module. These classes allow you to create a WCK-style
toplevel window, and use it to display raster data.
+ Fixed some Python 1.5.2 issues (to build under 1.5.2, use the
Makefile.pre.in/Setup.in approach)
+ Added support for the TIFF FillOrder tag. PIL can read mode "1",
"L", "P" and "RGB" images with non-standard FillOrder (based on
input from Jeff Breidenbach).
(1.1.4 final released)
+ Fixed ImageTk build problem on Unix.
(1.1.4b2 released)
+ Improved building on Mac OS X (from Jack Jansen).
+ Improved building on Windows with MinGW (from Klamer Shutte).
+ If no font is specified, ImageDraw now uses the embedded default
font. Use the "load" or "truetype" methods to load a real font.
+ Added embedded default font to the ImageFont module (currently
an 8-pixel Courier font, taken from the X window distribution).
(1.1.4b1 released)
+ Added experimental EXIF support for JPEG files. To extract EXIF
information from a JPEG file, open the file as usual, and call the
"_getexif" method. If successful, this method returns a dictionary
mapping EXIF TIFF tags to values. If the file does not contain EXIF
data, the "_getexif" method returns None.
The "ExifTags" module contains a dictionary mapping tags to tag
names.
This interface will most likely change in future versions.
+ Fixed a bug when using the "transparency" option with the GIF
writer.
+ Added limited support for "bitfield compression" in BMP files
and DIB buffers, for 15-bit, 16-bit, and 32-bit images. This
also fixes a problem with ImageGrab module when copying screen-
dumps from the clipboard on 15/16/32-bit displays.
+ Added experimental WAL (Quake 2 textures) loader. To use this
loader, import WalImageFile and call the "open" method in that
module.
(1.1.4a4 released)
+ Added updated SANE driver (Andrew Kuchling, Abel Deuring)
+ Use Python's "mmap" module on non-Windows platforms to read some
uncompressed formats using memory mapping. Also added a "frombuffer"
function that allows you to access the contents of an existing string
or buffer object as if it were an image object.
+ Fixed a memory leak that could appear when processing mode "P"
images (from Pier Paolo Glave)
+ Ignore Unicode characters in the BDF loader (from Graham Dumpleton)
(1.1.4a3 released; windows only)
+ Added experimental RGBA-on-RGB drawing support. To use RGBA
colours on an RGB image, pass "RGBA" as the second string to
the ImageDraw.Draw constructor.
+ Added support for non-ASCII strings (Latin-1) and Unicode
to the truetype font renderer.
+ The ImageWin "Dib" object can now be constructed directly from
an image object.
+ The ImageWin module now allows you use window handles as well
as device contexts. To use a window handle, wrap the handle in
an ImageWin.HWND object, and pass in this object instead of the
device context.
(1.1.4a2 released)
+ Improved support for 16-bit unsigned integer images (mode "I;16").
This includes TIFF reader support, and support for "getextrema"
and "point" (from Klamer Shutte).
+ Made the BdfFontFile reader a bit more robust (from Kevin Cazabon
and Dmitry Vasiliev)
+ Changed TIFF writer to always write Compression tag, even when
using the default compression (from Greg Couch).
+ Added "show" support for Mac OS X (from Dan Wolfe).
+ Added clipboard support to the "ImageGrab" module (Windows only).
The "grabclipboard" function returns an Image object, a list of
filenames (not in 1.1.4), or None if neither was found.
(1.1.4a1 released)
+ Improved support for drawing RGB data in palette images. You can
now use RGB tuples or colour names (see below) when drawing in a
mode "P" image. The drawing layer automatically assigns color
indexes, as long as you don't use more than 256 unique colours.
+ Moved self test from MiniTest/test.py to ./selftest.py.
+ Added support for CSS3-style color strings to most places that
accept colour codes/tuples. This includes the "ImageDraw" module,
the Image "new" function, and the Image "paste" method.
Colour strings can use one of the following formats: "#f00",
"#ff0000", "rgb(255,0,0)", "rgb(100%,0%,0%)", "hsl(0, 100%, 50%)",
or "red" (most X11-style colour names are supported). See the
documentation for the "ImageColor" module for more information.
+ Fixed DCX decoder (based on input from Larry Bates)
+ Added "IptcImagePlugin.getiptcinfo" helper to extract IPTC/NAA
newsphoto properties from JPEG, TIFF, or IPTC files.
+ Support for TrueType/OpenType fonts has been added to
the standard distribution. You need the freetype 2.0
library.
+ Made the PCX reader a bit more robust when reading 2-bit
and 4-bit PCX images with odd image sizes.
+ Added "Kernel" class to the ImageFilter module. This class
allows you to filter images with user-defined 3x3 and 5x5
convolution kernels.
+ Added "putdata" support for mode "I", "F" and "RGB".
+ The GIF writer now supports the transparency option (from
Denis Benoit).
+ A HTML version of the module documentation is now shipped
with the source code distribution. You'll find the files in
the Doc subdirectory.
+ Added support for Palm pixmaps (from Bill Janssen). This
change was listed for 1.1.3, but the "PalmImagePlugin" driver
didn't make it into the distribution.
+ Improved decoder error messages.
(1.1.3 final released)
+ Made setup.py look for old versions of zlib. For some back-
ground, see: http://www.gzip.org/zlib/advisory-2002-03-11.txt
(1.1.3c2 released)
+ Added setup.py file (tested on Unix and Windows). You still
need to build libImaging/imaging.lib in the traditional way,
but the setup.py script takes care of the rest.
The old Setup.in/Makefile.pre.in build method is still
supported.
+ Fixed segmentation violation in ANTIALIAS filter (an internal
buffer wasn't properly allocated).
(1.1.3c1 released)
+ Added ANTIALIAS downsampling filter for high-quality "resize"
and "thumbnail" operations. Also added filter option to the
"thumbnail" operation; the default value is NEAREST, but this
will most likely change in future versions.
+ Fixed plugin loader to be more robust if the __file__
variable isn't set.
+ Added seek/tell support (for layers) to the PhotoShop
loader. Layer 0 is the main image.
+ Added new (but experimental) "ImageOps" module, which provides
shortcuts for commonly used operations on entire images.
+ Don't mess up when loading PNG images if the decoder leaves
data in the output buffer. This could cause internal errors
on some PNG images, with some versions of ZLIB. (Bug report
and patch provided by Bernhard Herzog.)
+ Don't mess up on Unicode filenames.
+ Don't mess up when drawing on big endian platforms.
+ Made the TIFF loader a bit more robust; it can now read some
more slightly broken TIFF files (based on input from Ted Wright,
Bob Klimek, and D. Alan Stewart)
+ Added OS/2 EMX build files (from Andrew MacIntyre)
+ Change "ImageFont" to reject image files if they don't have the
right mode. Older versions could leak memory for "P" images.
(Bug reported by Markus Gritsch).
+ Renamed some internal functions to avoid potential build
problem on Mac OS X.
+ Added DL_EXPORT where relevant (for Cygwin, based on input
from Robert Yodlowski)
+ (re)moved bogus __init__ call in BdfFontFile (bug spotted
by Fred Clare)
+ Added "ImageGrab" support (Windows only)
+ Added support for XBM hotspots (based on code contributed by
Bernhard Herzog).
+ Added write support for more TIFF tags, namely the Artist,
Copyright, DateTime, ResolutionUnit, Software, XResolution and
YResolution tags (from Greg Couch)
+ Added TransposedFont wrapper to ImageFont module
+ Added "optimize" flag to GIF encoder. If optimize is present
and non-zero, PIL will work harder to create a small file.
+ Raise "EOFError" (not IndexError) when reading beyond the
end of a TIFF sequence.
+ Support rewind ("seek(0)") for GIF and TIFF sequences.
+ Load grayscale GIF images as mode "L"
+ Added DPI read/write support to the JPEG codec. The decoder
sets the info["dpi"] attribute for JPEG files with JFIF dpi
settings. The encoder uses the "dpi" option:
im = Image.open("file.jpg")
dpi = im.info["dpi"] # raises KeyError if DPI not known
im.save("out.jpg", dpi=dpi)
Note that PIL doesn't always preserve the "info" attribute
for normal image operations.
(1.1.2c1 and 1.1.2 final released)
+ Adapted to Python 2.1. Among other things, all uses of the
"regex" module has been repleased with "re".
+ Fixed attribute error when reading large PNG files (this bug
was introduced in maintenance code released after the 1.1.1
release)
+ Ignore non-string objects in sys.path
+ Fixed Image.transform(EXTENT) for negative xoffsets
+ Fixed loading of image plugins if PIL is installed as a package.
(The plugin loader now always looks in the directory where the
Image.py module itself is found, even if that directory isn't on
the standard search path)
+ The Png plugin has been added to the list of preloaded standard
formats
+ Fixed bitmap/text drawing in fill mode.
+ Fixed "getextrema" to work also for multiband images.
+ Added transparency support for L and P images to the PNG codec.
+ Improved support for read-only images. The "load" method now
sets the "readonly" attribute for memory-mapped images. Operations
that modifies an image in place (such as "paste" and drawing operations)
creates an in-memory copy of the image, if necessary. (before this
change, any attempt to modify a memory-mapped image resulted in a
core dump...)
+ Added special cases for lists everywhere PIL expects a sequence.
This should speed up things like "putdata" and drawing operations.
+ The Image.offset method is deprecated. Use the ImageChops.offset
function instead.
+ Changed ImageChops operators to copy palette and info dictionary
from the first image argument.
(1.1.1 released)
+ Additional fixes for Python 1.6/2.0, including TIFF "save" bug.
+ Changed "init" to properly load plugins when PIL is used as a
package.
+ Fixed broken "show" method (on Unix)
*** Changes from release 1.0 to 1.1 ***
+ Adapted to Python 1.6 ("append" and other method changes)
+ Fixed Image.paste when pasting with solid colour and matte
layers ("L" or "RGBA" masks) (bug reported by Robert Kern)
+ To make it easier to distribute prebuilt versions of PIL,
the tkinit binding stuff has been moved to a separate
extension module, named "_imagingtk".
*** Changes from release 0.3b2 to 1.0 final ***
+ If there's no 16-bit integer (like on a Cray T3E), set
INT16 to the smallest integer available. Most of the
library works just fine anyway (from Bill Crutchfield)
+ Tweaks to make drawing work on big-endian platforms.
(1.0c2 released)
+ If PIL is built with the WITH_TKINTER flag, ImageTk can
automatically hook into a standard Tkinter build. You
no longer need to build your own Tkinter to use the
ImageTk module.
The old way still works, though. For more information,
see Tk/install.txt.
+ Some tweaks to ImageTk to support multiple Tk interpreters
(from Greg Couch).
+ ImageFont "load_path" now scans directory mentioned in .pth
files (from Richard Jones).
(1.0c1 released)
+ The TIFF plugin has been rewritten. The new plugin fully
supports all major PIL image modes (including F and I).
+ The ImageFile module now includes a Parser class, which can
be used to incrementally decode an image file (while down-
loading it from the net, for example). See the handbook for
details.
+ "show" now converts non-standard modes to "L" or "RGB" (as
appropriate), rather than writing weird things to disk for
"xv" to choke upon. (bug reported by Les Schaffer).
(1.0b2 released)
+ Major speedups for rotate, transform(EXTENT), and transform(AFFINE)
when using nearest neighbour resampling.
+ Modified ImageDraw to be compatible with the Arrow graphics
interface. See the handbook for details.
+ PIL now automatically loads file codecs when used as a package
(from The Dragon De Monsyne). Also included an __init__.py file
in the standard distribution.
+ The GIF encoder has been modified to produce much smaller files.
PIL now uses a run-length encoding method to encode GIF files.
On a random selection of GIF images grabbed from the web, this
version makes the images about twice as large as the original
LZW files, where the earlier version made them over 5 times
larger. YMMV, of course.
+ Added PCX write support (works with "1", "P", "L", and "RGB")
+ Added "bitmap" and "textsize" methods to ImageDraw.
+ Improved font rendering code. Fixed a bug or two, and moved
most of the time critical stuff to C.
+ Removed "bdf2pil.py". Use "pilfont.py" instead!
+ Improved 16-bit support (still experimental, though).
The following methods now support "I;16" and "I;16B" images:
"getpixel", "copy", "convert" (to and from mode "I"), "resize",
"rotate", and "transform" with nearest neighbour filters, and
"save" using the IM format. The "new" and "open" functions
also work as expected. On Windows, 16-bit files are memory
mapped.
NOTE: ALL other operations are still UNDEFINED on 16-bit images.
+ The "paste" method now supports constant sources.
Just pass a colour value (a number or a tuple, depending on
the target image mode) instead of the source image.
This was in fact implemented in an inefficient way in
earlier versions (the "paste" method generated a temporary
source image if you passed it a colour instead of an image).
In this version, this is handled on the C level instead.
+ Added experimental "RGBa" mode support.
An "RGBa" image is an RGBA image where the colour components
have have been premultipled with the alpha value. PIL allows
you to convert an RGBA image to an RGBa image, and to paste
RGBa images on top of RGB images. Since this saves a bunch
of multiplications and shifts, it is typically about twice
as fast an ordinary RGBA paste.
+ Eliminated extra conversion step when pasting "RGBA" or "RGBa"
images on top of "RGB" images.
+ Fixed Image.BICUBIC resampling for "RGB" images.
+ Fixed PCX image file handler to properly read 8-bit PCX
files (bug introduced in 1.0b1, reported by Bernhard
Herzog)
+ Fixed PSDraw "image" method to restore the coordinate
system.
+ Fixed "blend" problem when applied to images that was
not already loaded (reported by Edward C. Jones)
+ Fixed -f option to "pilconvert.py" (from Anthony Baxter)
(1.0b1 released)
+ Added Toby J. Sargeant's quantization package. To enable
quantization, use the "palette" option to "convert":
imOut = im.convert("P", palette=Image.ADAPTIVE)
This can be used with "L", "P", and "RGB" images. In this
version, dithering cannot be used with adaptive palettes.
Note: ADAPTIVE currently maps to median cut quantization
with 256 colours. The quantization package also contains
a maximum coverage quantizer, which will be supported by
future versions of PIL.
+ Added Eric S. Raymond's "pildriver" image calculator to the
distribution. See the docstring for more information.
+ The "offset" method no longer dumps core if given positive
offsets (from Charles Waldman).
+ Fixed a resource leak that could cause ImageWin to run out of
GDI resources (from Roger Burnham).
+ Added "arc", "chord", and "pieslice" methods to ImageDraw (inspired
by code contributed by Richard Jones).
+ Added experimental 16-bit support, via modes "I;16" (little endian
data) and "I;16B" (big endian). Only a few methods properly support
such images (see above).
+ Added XV thumbnail file handler (from Gene Cash).
+ Fixed BMP image file handler to handle palette images with small
palettes (from Rob Hooft).
+ Fixed Sun raster file handler for palette images (from Charles
Waldman).
+ Improved various internal error messages.
+ Fixed Path constructor to handle arbitrary sequence objects. This
also affects the ImageDraw class (from Richard Jones).
+ Fixed a bug in JpegDecode that caused PIL to report "decoder error
-2" for some progressive JPEG files (reported by Magnus Källström,
who also provided samples).
+ Fixed a bug in JpegImagePlugin that caused PIL to hang when loading
JPEG files using 16-bit quantization tables.
+ The Image "transform" method now supports Image.QUAD transforms.
The data argument is an 8-tuple giving the upper left, lower
left, lower right, and upper right corner of the source quadri-
lateral. Also added Image.MESH transform which takes a list
of quadrilaterals.
+ The Image "resize", "rotate", and "transform" methods now support
Image.BILINEAR (2x2) and Image.BICUBIC (4x4) resampling filters.
Filters can be used with all transform methods.
+ The ImageDraw "rectangle" method now includes both the right
and the bottom edges when drawing filled rectangles.
+ The TGA decoder now works properly for runlength encoded images
which have more than one byte per pixel.
+ "getbands" on an YCbCr image now returns ("Y", "Cb", "Cr")
+ Some file drivers didn't handle the optional "modify" argument
to the load method. This resulted in exceptions when you used
"paste" (and other methods that modify an image in place) on a
newly opened file.
*** Changes from release 0.2 (b5) to 0.3 (b2) ***
(0.3b2 released)
The test suite includes 825 individual tests.
+ An Image "getbands" method has been added. It returns a tuple
containing the individual band names for this image. To figure
out how many bands an image has, use "len(im.getbands())".
+ An Image "putpixel" method has been added.
+ The Image "point" method can now be used to convert "L" images
to any other format, via a lookup table. That table should
contain 256 values for each band in the output image.
+ Some file drivers (including FLI/FLC, GIF, and IM) accidently
overwrote the offset method with an internal attribute. All
drivers have been updated to use private attributes where
possible.
+ The Image "histogram" method now works for "I" and "F" images.
For these modes, PIL divides the range between the min and
max values used in the image into 256 bins. You can also
pass in your own min and max values via the "extrema" option:
h = im.histogram(extrema=(0, 255))
+ An Image "getextrema" method has been added. It returns the
min and max values used in the image. In this release, this
works for single band images only.
+ Changed the PNG driver to load and save mode "I" images as
16-bit images. When saving, values outside the range 0..65535
are clipped.
+ Fixed ImageFont.py to work with the new "pilfont" compiler.
+ Added JPEG "save" and "draft" support for mode "YCbCr" images.
Note that if you save an "YCbCr" image as a JPEG file and read
it back, it is read as an RGB file. To get around this, you
can use the "draft" method:
im = Image.open("color.jpg")
im.draft("YCbCr", im.size)
+ Read "RGBA" TGA images. Also fixed the orientation bug; all
images should now come out the right way.
+ Changed mode name (and internal representation) from "YCrCb"
to "YCbCr" (!)
*** WARNING: MAY BREAK EXISTING CODE ***
(0.3b1 released)
The test suite includes 750 individual tests.
+ The "pilfont" package is now included in the standard PIL
distribution. The pilfont utility can be used to convert
X BDF and PCF raster font files to a format understood by
the ImageFont module.
+ GIF files are now interlaced by default. To write a
non-interlaced file, pass interlace=0 to the "save"
method.
+ The default string format has changed for the "fromstring"
and "tostring" methods.
*** WARNING: MAY BREAK EXISTING CODE ***
NOTE: If no extra arguments are given, the first line in
the string buffer is the top line of the image, instead of
the bottom line. For RGB images, the string now contains
3 bytes per pixel instead of 4. These changes were made
to make the methods compatible with the "fromstring"
factory function.
To get the old behaviour, use the following syntax:
data = im.tostring("raw", "RGBX", 0, -1)
im.fromstring(data, "raw", "RGBX", 0, -1)
+ "new" no longer gives a MemoryError if the width or height
is zero (this only happened on platforms where malloc(0)
or calloc(0) returns NULL).
+ "new" now adds a default palette object to "P" images.
+ You can now convert directly between all modes supported by
PIL. When converting colour images to "P", PIL defaults to
a "web" palette and dithering. When converting greyscale
images to "1", PIL uses a thresholding and dithering.
+ Added a "dither" option to "convert". By default, "convert"
uses floyd-steinberg error diffusion for "P" and "1" targets,
so this option is only used to *disable* dithering. Allowed
values are NONE (no dithering) or FLOYDSTEINBERG (default).
imOut = im.convert("P", dither=Image.NONE)
+ Added a full set of "I" decoders. You can use "fromstring"
(and file decoders) to read any standard integer type as an
"I" image.
+ Added some support for "YCbCr" images (creation, conversion
from/to "L" and "RGB", IM YCC load/save)
+ "getpixel" now works properly with fractional coordinates.
+ ImageDraw "setink" now works with "I", "F", "RGB", "RGBA",
"RGBX", "CMYK", and "YCbCr" images.
+ ImImagePlugin no longer attaches palettes to "RGB" images.
+ Various minor fixes.