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# GraphicsMagick News

This file was last updated on July 25, 2009

Please note that this file records news for the associated development branch and that each development branch has its own NEWS file. See the ChangeLog file for full details.

- 1.3.6 (July 25, 2009)
- 1.3.5 (January 26, 2009)
- 1.3.4 (January 13, 2009)
- 1.3.3 (December 9, 2008)
- 1.3.2 (November 29, 2008)
- 1.3.1 (November 17, 2008)
- 1.3 (November 9, 2008)
- 1.2 (April 29, 2008)
- 1.1 (Released April 4, 2004)
- 1.0 (Released in May, 2003)

# 1.3.6 (July 25, 2009)

Security Fixes:

> - None.

Bug fixes:

> - Composition was failing when the change image overlaps off the left side of the canvas.
> - EPT, PDF, PS: PDF bounding box is sometimes incorrect or not globally applicable so don't specify bounding box when reading PDF files.
> - OpenMP: Fix (benign) multi-thread cross-contentions (detected by valgrind's Helgrind).
> - TIFF: Fix problem with reading one bit per sample RGB images.
> - TIFF: Writer was using rows-per-strip of 8 when writing JPEG-compressed TIFF. This does not work for vertical subsampling, and some TIFF readers insist on 16. The rows-per-strip is now required to be a multiple of 16.
> - TIFF: In some cases, the TIFF reader and writer were accessing planar TIFF in row-order rather than plane-order, which resulted in sever buffering problems in libtiff, and failure when compression was used.
> - -write now works usefully as documented.
> - Temporary file name generator was not random enough, resulting in some file name collisions for GraphicsMagick processes started at the same time.
> - PerlMagick: Fixed Ping on a BLOB.
> - GetImageDepth was leaking memory.
> - Convert/mogrify -mask option was leaking memory.
> - Mogrify -output-directory option was leaking memory.
> - DPX: Fixed memory leak encountered when subsampling to 4:2:2.
> - DPX: Values read received insuficient scaling, which round-tripped correctly, but rounded-down excessively if any image processing was applied.

New Features:

> - Added HRS reader for slow scan TV (contributed by Fojtik Jaroslav).
> - Pthreads (POSIX threads) API may now be used under the WIN32 API.
> - New access confirmation facility (MagickConfirmAccess) to allow the API user to monitor and/or block access to files and URLs. This allows the API user to implement a security policy based on actual accesses.
> - New color matrix function (ColorMatrixImage) to apply a color matrix similar to Adobe Flash Flash.filters.colorMatrixFilter(), and Windows GDI+ ColorMatrix class, (order up to 5x5) to the image pixels. This is accessible via the -recolor command option.
> - Added an IDENTITY coder to return a Hald identity CLUT image of specified order (e.g. "identity:8").
> - Added a Hald CLUT capability as described at http://www.quelsolaar.com/technology/clut.html. This allows a color transformation to be easily created and replicated on any number of images. The algorithm is accessed by the -hald-clut option of 'convert' and 'mogrify'. Original algorithm by Eskil Steenberg and adapted for GraphicsMagick by Clément Follet, with additional work by Bob Friesenhahn.
> - Added support for the ASC CDL transform. Available as -asc-cdl via the 'convert' and 'mogrify' subcommands. Original implementation by Clément Follet but considerably re-worked by Bob Friesenhahn. Implementation passes the +/- 1 count accuracy requirement required by the ASC CDL SOP tests.
> - Added support for reading CALS Type 1 format (contributed by John Sergeant). CALS is a standard raster format used by the US Department of Defense for storing blueprint images.
> - Added a random number generation system based on George Marsaglia's multiply-with-carry generator. Somewhat slower than rand() but produces better random numbers with a period >2^60. This is a much better random number generator than the C library rand() and the algorithm is integrated in a way which maximizes multi-thread performance.
> - The 'compare' command now supports a -maximum-error option to specify the maximum image error so that it may be used to support boolean logic in automated test scripts.
> - For OpenMP-builds, the '-list resource' output now indicates the number of threads which will be used.

Feature improvements:

> - Image resize now avoids adding "halos" around objects when resizing an image which contains transparency (patch contributed by Pavel Merdin).
> - DICOM: The DICOM reader is completely re-written and is much more functional now. A few features (e.g. RLE compression) are still missing. This work is contributed by John Sergeant.
> - EXIF: Unprintable characters in EXIF attribute strings are now returned using three-digit octal notation. Unknown tags are identified via their four-character hex value.
> - PCL: PCL writer is rewritten to fix many bugs, add support for compression, add support for 8 bit PseudoClass images, and dramatically improve usability (work contributed by John Sergeant).
> - TIFF: Allow the user to force the returned image to be TrueColor type for min-is-white and min-is-black TIFF files.
> - TIFF: User can now specify the predictor using syntax like '-define tiff:predictor=2'.
> - TIFF: User can now specify the rows-per-strip value when using JPEG compression.
> - TXT: The TXT reader is now capable of reading image files written by the TXT writer, as well continuing to render ASCII text into an image (work contributed by Fojtik Jaroslav).
> - Utilities @file.txt syntax for including a list of files to use as an argument now really works as expected. This may be used to inject any other text into the command line as well. As a result, the 'mogrify' utility may be invoked on thousands of files at once while obtaining the list of files to process from a text file.
> - The 'mogrify' utility now caches argument images so that they are loaded only once when mogrify is used to process multiple image files.

Performance Improvements:

> - -median and -noise now see reliable linear speedup as threads are added.

Behavior Changes:

> - PerlMagick is configured but no longer built by default.
> - Use '-interlace Line' to produce an interlaced GIF, PNG, or progressive JPEG.

# 1.3.5 (January 26, 2009)

Security Fixes:

> - BMP and DIB formats were throwing an assertion for negative height values. This caused the process to crash.

Bug fixes:

> - Don't install Magick++ headers if C++ is disabled.
> - Linux RPM SPEC file needs to always install the loadable module .la files or else the modules won't load.
> - Windows runtime DLLs were for the wrong compiler version, resulting in failure to execute if the correct runtime DLLs are not available.

New Features:

> - None

Feature improvements:

> - FITS: Parsing is more robust.

Performance Improvements:

> - None

# 1.3.4 (January 13, 2009)

Security Fixes:

> - None.

Bug fixes:

> - Now runs under Windows Vista (as a 32-bit application).
> - Fix for colorspace transform math overflow in Q32 build.

New Features:

> - Windows build supports OpenMP and requires Windows 2000 or later (source code still supports Windows '98).
> - Support large files under Windows.
> - Support reading/writing 16 and 24 bit float TIFF files.
> - Support reading/writing 64 bit integer TIFF files.
> - Added "Log", "Max", "Min", and "Pow" options to -operator.

Feature improvements:

> - Debug logging now properly prints 64-bit offset values.

Performance Improvements:

> - Improve resource estimation for Microsoft Windows systems.

# 1.3.3 (December 9, 2008)

Security Fixes:

> - None.

Bug fixes:

> - 'identify' was throwing an assertion when used on colormapped files (this bug was introduced by 1.3.2).
> - With the -segment option, eliminate trashing the image colors when used on huge images.
> - 'identify -format "%c"' now reports the entire comment regardless of size.
> - Argument to -convolve is no longer arbitrarily truncated so huge convolution kernels may now be specified from the command line.

Performance Improvements:

> - Image segmentation (-segment) is now accelerated using OpenMP and uses several other tactics to improve execution performance.
> - 'identify "*"' now successfully works in a 32-bit application when used in a directory containing a million files.
> - 'identify' now executes quickly when used on TIFF files.

# 1.3.2 (November 29, 2008)

Security Fixes:

> - None.

Bug fixes:

> - -roll was failing for colormapped images.
> - VID: Memory leak fix.
> - PREVIEW: Solarize parameter was wrong.
> - Delegates previously using 'spawn' needed an ampersand so that starting the child process does not hang the GUI.

Feature improvements:

> - +profile now supports an exclusion syntax. For example `+profile '!icm,*'` removes all of the profiles except for the ICM profile. The new syntax also allows multiple profiles to be listed at once.

Performance Improvements:

> - AdaptiveThreshold, Blur, Convolve, and MotionBlur no longer process the opacity channel unless the image has one.

# 1.3.1 (November 17, 2008)

Security Fixes:

> - None.

Bug fixes:

> - RPM build, Fixes to successfully build binary RPMs for Red Hat Linux 4.
> - MSL/conjure, Fix bug with attributes becoming appended to themselves. Fix memory leaks.

Feature improvements:

> - New --disable-openmp-slow configure option for disabling use of OpenMP for algorithms which may run slower on operating systems with crummy thread libraries.
> - JPEG, Allow user to specify DCT encoding method via jpeg:dct-method define. Also allow control over whether huffman encoding is used via jpeg:optimize-coding define.

Performance Improvements:

> - OpenMP (parallel processing) improvements for these functions:
>   - Rotate by 90 and 270 degrees (-rotate)

# 1.3 (November 9, 2008)

Security fixes:

> - AVI reader: Re-worked to be more robust against crash or DOS.
> - AVS reader: Re-worked to be more robust against crash or DOS.
> - DCM reader: Re-worked to be more robust against crash or DOS.
> - EPT reader: Re-worked to be more robust against crash or DOS.
> - FITS reader: Re-worked to be more robust against crash or DOS.
> - MTV reader: Re-worked to be more robust against crash or DOS.
> - PALM reader: Re-worked to be more robust against crash or DOS.
> - RLA reader: Re-worked to be more robust against crash or DOS.
> - TGA reader: Re-worked to be more robust against crash or DOS.
> - Avoid possible crash in GetImageCharacteristics() when substituting text in comment read from file.
> - Cineon reader: Fixed crash with broken file from Sami Liedes.
> - Palm reader: Fixed crash with broken files from Sami Liedes.
> - PICT reader: Fixed crash with broken files from Sami Liedes.
> - DPX reader: Validate file data better to avoid improper operation with intentionally (or accidentally) defective files.
> - XCF reader: Fixed crash with broken files from Sami Liedes.

Bug fixes:

> - Libbz2 is now detected for MinGW.
> - Install documentation under /usr/local/share/doc/GraphicsMagick by default, according to GNU conventions.
> - In PerlMagick, Dissolve composition was not working right.
> - FITS: Ensure that written format conforms to specification.
> - TIFF:
>   - Don't accidentially convert CMYK images to RGB.
>   - Eliminated a memory leak in the codec support detection code.
> - JPEG: Removed over-write of image->client_data.
> - PDF: Try to properly deal with reading rotated PDFs.
> - PNG: Fixed crash when writing PNG images with transparency and either optimize is requested, or the image is colormapped.
> - Configure: Fixed the --enable-magick-compat configure option, which had stopped working.
> - Configure: Fixed --without-magick-plus-plus so that it works again. This stopped working in the 1.2 release cycle.
> - Configure: Fixed MagickLibVersion text string generation so that it is now correct when a component of the release number exceeds '9'. Now components can safely count up to '99' before there is a problem.

Performance Improvements:

> - OpenMP (parallel processing) improvements for these functions:
>   - Affine transform (-affine -transform)
>   - Average images (-average)
>   - Add noise (+noise)
>   - Black threshold (-black-threshold)
>   - Blur (-blur)
>   - Border (-border)
>   - Channel import, export, and depth-setting (-channel, -depth)
>   - Clip path
>   - Coalesce (-coalesce)
>   - Colorize (-colorize)
>   - Colorspace transformation (-colorspace)
>   - Compare images ('compare' command)
>   - Composition ('composite' command)
>   - Convolution (-convolve, -edge, -emboss, -gaussian, -sharpen)
>   - Contrast adjust (-contrast)
>   - Crop (-crop)
>   - CycleColormap (-cycle)
>   - Depth setting (-depth, -operator depth)
>   - Despeckle (-despeckle)
>   - Enhance (-enhance)
>   - Equalize (-equalize)
>   - Flatten (-flatten)
>   - Flip (-flip)
>   - Flop (-flop)
>   - Frame (-frame)
>   - Gamma adjust (-gamma, -operator gamma)
>   - Gradient
>   - Implode (-implode)
>   - Levels adjust image (-level)
>   - Local adaptive threshold (-lat)
>   - Median filter (-median)
>   - Minify image (-minify)
>   - Modulate image (-modulate)
>   - Morph image (-morph)
>   - Mosiac (-mosaic)
>   - Motion blur (-motion-blur)
>   - Negate image (-negate)
>   - Noise filter (-noise)
>   - Normalize image (-normalize)
>   - Oil Paint (-paint)
>   - Opaque (-opaque)
>   - Ordered dither (-ordered-dither)
>   - Operators (-operator)
>   - Profile adjust (ICC) (-profile)
>   - Random threshold (-random-threshold)
>   - Resize image (-resize)
>   - Raise image (-raise)
>   - Roll image (-roll)
>   - Rotate image (-rotate)
>   - Shade image (-shade)
>   - Shear image (-shear)
>   - Shave (-shave)
>   - Solarize image (-solarize)
>   - Spread image (-spread)
>   - Statistics computation (identify -verbose)
>   - Swirl (-swirl)
>   - Threshold channel (-threshold, -operator threshold)
>   - Threshold image (-threshold)
>   - Transparent (-transparent)
>   - Trim image (-trim)
>   - UnsharpMaskImage (-unsharp)
>   - Wave (-wave)
>   - White threshold (-white-threshold)
> - Improved coder management performance.
> - XCF (GIMP) reader is much faster.

New Features:

> - Use MAGICK_CODER_STABILITY environment variable to enable a subset of the coders based on their stability classification.
> - Use MAGICK_IO_FSYNC environment variable to cause written file to be synchronized to disk to avoid possible data loss on power fail.
> - Added 'compare' command to statistically or visually compare two image files.
> - Added new channel operators (-operator):
>   - Assign
>   - Gamma
>   - Depth
>   - Negate
>   - Noise-Gaussian
>   - Noise-Impulse
>   - Noise-Laplacian
>   - Noise-Multiplicative
>   - Noise-Poisson
>   - Noise-Uniform
>   - Threshold
>   - ThresholdBlack
>   - ThresholdWhite
> - New composition operators (-compose):
>   - CopyBlack
>   - CopyCyan
>   - CopyMagenta
>   - CopyYellow
>   - Divide
> - Added -motion-blur to motion blur the image.
> - Mogrify and convert now support -black-threshold and -white-threshold.
> - MAT: Now supports reading compressed files.
> - FITS: Now supports 8, 16, 32 bit integer, float, and double images and writes correct FITS format.
> - DCRAW: Coder proxy module allows reading digital camera files as if they were natively supported.
> - New C API functions:
>   - AddNoiseImageChannel(), add noise to an image channel.
>   - BlurImageChannel(), blur an image channel.
>   - GaussianBlurImageChannel(), gaussian blur an image channel.
>   - ImportImageChannelsMasked(), import selected image channels.
>   - SharpenImageChannel(), sharpen an image channel.
>   - UnsharpMaskImageChannel(), unsharpmask an image channel.
>   - New cache view interfaces to correct shortcommings of original ones. New interfaces are AcquireCacheViewPixels(), AcquireOneCacheViewPixel(), AcquireCacheViewIndexes(), GetCacheViewPixels(), SetCacheViewPixels(), and SyncCacheViewPixels(). The deprecated functions are AcquireCacheView(), GetCacheView(), SetCacheView(), and SyncCacheView().
>   - GetCacheViewRegion() reports region bounded by a cache view.
>   - GetCacheViewArea() reports area bounded by a cache view.
>   - ExportViewPixelArea() exports a cache view as formatted pixels.
>   - ImportViewPixelArea imports formatted pixels into a cache view.
> - Removed C API functions:
>   - ReadStream()
>   - WriteStream()
> - Magick++ C++ API improvements
>   - Color class no longer considers transparent black to be an invalid color.
>   - New Image methods addNoiseChannel(), blurChannel(), gaussianBlurChannel(), motionBlur(), randomThresholdChannel(), randomThresholdChannel(), sharpenChannel(), unsharpmaskChannel().

Feature improvements:

> - -ordered-dither and -random-threshold may now be used to individually dither any named channel.
> - Mogrify and convert now support -minify to halve the image size.
> - Mogrify and convert now support -magnify to double the image size.

# 1.2 (April 29, 2008)

Security fixes:

> - Fixes for CERT security alert TA04-217A described at "http://www.us-cert.gov/cas/techalerts/TA04-217A.html".
> - AVI, BMP, & DIB security fixes.
> - PSD security fixes.
> - P7 format security fix.
> - Fix EXIF IFD stack overflow vulnerability.
> - SGI security fix for RLE encoding (CVE-2006-4144)
> - XCF security fix (CVE-2006-3743)
> - PALM heap overflow fix (CVE-2006-5456)
> - DCM security fix (CVE-2006-5456)
> - Fix for shell command injection in delegate code via file names) (CVE-2005-4601). Delegate execution is much more secure now.
> - Don't use filenames as printf specifications (CVE-2006-0082).
> - Fix integer overflow in DCM coder (CVE-2007-1797).
> - XWD integer overflow fix (CVE-2007-1797).
> - Implementation has replaced usage of strcpy, strcat, and strncat with the more security conscious strlcat and strlcpy.
> - DCM, DIB, XCF, XBM, and XWD security fix for integer overflow vulnerability (IDefense 09.19.07).
> - Do not access X11 or invoke convenience or stealth delegate programs based on the file extension. In particular, these file extensions are rejected for consideration as a format specifier: 'autotrace', 'browse', 'dcraw', 'edit', 'gs-color', 'gs-color+alpha', 'gs-gray', 'gs-mono', 'launch', 'mpeg-encode', 'print', 'scan', 'show', 'win', 'xc', and 'x'.

Bug fixes:

> - The configure script now searches for a web browser in the order mozilla, firefox, and finally netscape.
> - When the user specifies the -units option, the current image resolution values are now re-scaled to match the new units.
> - Properly determine Ghostscript font location for Ghostscript 8.0 and later.
> - GraphicsMagick now successfully builds and passes all tests under Digital Unix 5.1, using the vendor compiler.
> - Ghostscript sometimes displays an error message and fails, yet it returns a success error code to GraphicsMagick. Verify that Ghostscript has updated the output file before attempting to use it.
> - Fixed a configure script syntax error when testing for trio.
> - When requesting a list of formats, all of the modules in the module search path are considered. Previously only the modules in the same directory as the LOGO module were listed.
> - Ensure that an image clip mask is respected by the negate algorithm.
> - The BMP writer was sometimes writing incorrect BMP v4 files.
> - Support reading and writing large PCX files.
> - The Red Hat source RPM was failing to install the -config scripts with execute permissions.
> - Fixed a bug which could cause possible truncation while cloning the image cache.
> - Ensure that MIFF files indicate the compression which was actually used.
> - Properly handle errors from libtiff so that corrupted images are not output.
> - Fix for stripped-TIFF reader. Discard extra samples beyond alpha in scanline TIFFs.
> - Endian option now controls TIFF byte-order rather than bit-order.
> - TIFF writer can now write to pipes and other non-seekable output destinations.
> - JBIG writer was writing empty files for some libjbig releases.
> - Improved handling of corrupt GIF files.
> - Handle large SUN format images.
> - Properly compute image depth for 16-bit SGI image files.
> - For the gmdisplay program, ensure that only RGB data is sent to Windows.
> - Many memory leak fixes.
> - PDF writer is fixed so that Ghoscript 8.5 doesn't warn about the output.
> - PDF writer now writes proper output with CCITT compression.
> - Properly use fseeko() and ftello() if they are available.
> - Fixed a infinite loop bug in the XWD reader.
> - Fix minor memory leak in ProfileImage().
> - Fixed -level command parsing when a percent symbol is supplied within the argument rather than at the end.
> - Fix pixel scaling problem caused by floating point rounding error (noticed under AIX).
> - Fixed a memory leak in the GIF coder in the error return path.
> - Fix for SourceForge bug id 1353744 "MagickGetQuantumDepth doesn't work".
> - Fix for SourceForge bug id 1315109 "segfault in InitializeMagick(NULL)".
> - Fix for SourceForge bug id 1391421 "problem doing resize on 273x1 JPEG".
> - Fix for SourceForge bug id 1510075 "Failed to write PDF with JPEG compression".
> - Fix for SourceForge bug id 1572357 "GetOnePixel definition appears incorrect".
> - Fix for SourceForge bug id 1576616 Fix includedir variable in pkg-config files".
> - Fix for SourceForge bug id 1173713 "segfault in ModifyCache".
> - Fix for SourceForge bug id 1431805 "clip art wpg files cause access violation in graphics magick".
> - Fix for SourceForge bug id 1743141 "Affine matrix option parsing".
> - Fix for SourceForge bug id 1625477 "Memory leak reading layered PSD Image".
> - Fix for SourceForge bug id 1878992 "literal square brackets in file name cause large delay and bug id 1783209 "converting runs slowly when subimage is specified".
> - Fix for SourceForge bug id 1883527 "compression of tiff-file has no effect".
> - Successfully read files in the form "file[123]".
> - Fix reading 12-bit grayscale JPEG.
> - Set image depth appropriately when importing image from X11 display.
> - Fix map resource tracking.
> - Fix reading recent variants of ImageMagick's MIFF format.
> - Output bilevel TIFF meeting the TIFF Class F specification.

New Utilities:

> - A 'benchmark' subcommand is now available to benchmark the performance of any other arbitrary subcommand (e.g. 'convert').

Feature improvements:

> - LZW compression is now enabled by default.
> - Support industry-standard subsampling notation like "4:2:2".
> - If gm is executed under a traditional alternate name (e.g. convert), it will invoke the appropriate sub-command. This allows use of hard links, symbolic links, or just copying 'gm' to the desired sub-command name in order to achieve 100% ImageMagick 5.5.2 utility compatibility.
> - Provide the --enable-magick-compat option when configuring to install ImageMagick utilities compatibility links.
> - Identify -verbose output includes normalized (0.0-1.0) statistics.
> - Identify and convert now print "pixels per second" rates to help evaluate performance.
> - Added the identify +ping option to force reading the complete file.
> - The display program now supports the +progress option to disable any visual progress indication (and hourglass cursor) while loading images.
> - Support writing grayscale TGA files.
> - Provide explicit support for Rec 601 and Rec 709 grayscale spaces.
> - Include some support for a log RGB space based on the 2.048 density range as defined for the Cineon Digital Film System.
> - Added utilities command-line support for industry standard subsampling notation like 4:4:4 and 4:2:2.
> - Use MAGICK_IOBUF_SIZE to tune the size of the I/O buffer.
> - Use -type Bilevel, Grayscale, TrueColor, or TrueColorMatte to influence the type of image that Ghostscript returns.
> - Use '-define tiff:fill-order={msb2lsb|lsb2msb}' to control TIFF bit fill order.
> - The -version option now dumps a feature list as well as the build options.
> - The -endian option now supports the option 'native'.
> - A -monitor is added to enable progress monitoring for the command line utilities.
> - Use the -output-directory option to 'mogrify' to send output files to the specified directory.
> - Use the -create-directories option in conjunction with -output-directory and 'mogrify' to create any necessary subdirectories.
> - A Pixels resource limit is added. Use '-limit Pixels value' to limit the maximum number of pixels in an image to 'value'.
> - The already supported option '-type Optimize' is now honored by formats that need to choose a subformat based on the properties of the image. Grueling tests of many/all pixels are not performed unless '-type Optimize' is supplied.
> - Added a a -set option to the composite, convert, display, mogrify, import commands in order to allow setting an image attribute.
> - Display utility no longer defaults to reading from standard input if stdin is not a tty.
> - May now be configured to use the umem memory allocation library available in Solaris 9, Update 3 and later, or from the portable umem project.

Coder additions/improvements:

> - Replaced existing DPX "support" with all-new DPX support conforming to the SMPTE 268M-2003 standard.
> - Cineon reader completely rewritten.
> - TIFF coder is completely re-written. Now supports reading and writing RGB, CMYK, and grayscale, scanline-oriented TIFF images with arbitrary (1 to 32 bits) depth. Includes support for tiled TIFF, floating point TIFF, LogLuv TIFF, BigTIFF, arbitrary depths, and associated alpha.
> - TIFF coder now supports retrieving and saving XMP profiles.
> - MATLAB support is much improved and supports writing as well.
> - WPG reader now supports CTM translations.
> - ART format now supports writing.
> - Support 32-bit raw RGB images.
> - Support 32-bit raw CMYK images.
> - Support 32-bit raw gray images.
> - JP2 coder reads images in YCbCr colorspace and retrieves an embedded ICC ICM color profile if present.

API enhancements:

> - Added ExportImageChannel() and ImportImageChannel() APIs to support exporting and importing pixel regions with an arbitary range of (1 to 32) bits per quantum.
> - Added image leveling methods for Magick++.
> - Generalized GetImageAttribute() support for retrieving wildcarded attributes so that an identify -format specification like `"%[dpx:*]"` works as expected.
> - Incorporated changes changes necessary so that GraphicsMagick can work with the Ch C/C++ interpreter from SoftIntegration at http://www.softintegration.com/.
> - Added MagickAllocFunctions() to allow the API user to replace the underlying memory allocator functions.
> - Added MagickMalloc() and deprecated AcquireMemory().
> - Added MagickCloneMemory() and deprecated CloneMemory().
> - Added MagickMallocArray() to safely allocate N items of size S.
> - Added MagickRealloc() and deprecated ReacquireMemory().
> - Added MagickFree() and deprecated LiberateMemory().

Performance improvments:

> - The DispatchImage() and ConstituteImage() functions incorporate special case code for BGR, BGRO, BGRP, RGB, RGBO, and I formats (8 bit only) in order to improve performance dramatically.
> - When writing very large JPEG images, don't enable Huffman compression since doing so requires libjpeg to buffer the entire image in memory.
> - When using the 'identify' -verbose option, -verbose must be specified twice in order to obtain the color count. This makes normal use of -verbose much faster.
> - Significantly improved read/write speed for bilevel and gray images.
> - TIFF I/O is considerably faster.
> - Postscript writer is 10-15X faster.
> - PNM formats writer is 10-100X faster.
> - Rotate by 90 or 270 degrees is 2-9X faster.

Windows-specific improvements/changes:

> - For the MinGW and Cygwin builds, the Magick++ library is forced to build as a static library since otherwise C++ exceptions don't work.
> - MinGW cross-build is available from a Linux or FreeBSD host.
> - Determine location of Ghostscript fonts only once in order to improve performance.
> - Updated bzip2 to 1.0.4.
> - Updated Jasper library to version 1.900.1.
> - Updated jbigkit to 1.6
> - Updated lcms to 1.17
> - Updated libpng to 1.2.27.
> - Updated libtiff to 3.8.2
> - Updated zlib to 1.2.3.
> - Libtiff supports LZW compression.
> - X11 is no longer part of the default build and will not be included in the distributed install packages (but can still be built).
> - Find latest Ghostscript which idenfies itself as "GPL Ghostscript".
> - Use GlobalMemoryStatusEx(), if available, to determine how much physical memory is available. Important for large-memory machines.
> - Fixed NTreaddir() so that it does not write beyond its buffer.
> - Fixed opendir() emulation function so it can't overwrite the stack.
> - FlashPIX library sources are no longer distributed in the Windows source package and building FlashPIX is disabled by default. FlashPIX may still be built by adding the library (separately distributed).
> - Fix bitmap handle leak in CropImageToHBITMAP() and ImageToHBITMAP().

# 1.1 (Released April 4, 2004)

Bug fixes:

> - Semaphore fix which is necessary for proper multi-threaded operation.
> - Configure script fix to ensure that -lfpx is not supplied to the C compiler during subsequent tests since this fails on some systems.
> - Fix for East and West gravity computations.
> - System error reports (errno) associated with an exception are now correctly obtained from the context existing when the exception was thrown rather than the context of the reporting function.
> - JNG encoder fix. Files were being written with incorrect alpha_sample_value in the header. These can be repaired by reading them into GM 1.1 and rewriting them.
> - XPM fix to module registration.
> - PSD fix for index calculation when QuantumDepth>8.
> - Validate that geometry specifications only include allowed characters.
> - SGI fix to save compression type while writing.
> - EXIF attributes were not being retrieved when requested.
> - Fix for bug when reading an image via a user-provided file descriptor.
> - The reported image magick string is now always that of the original input file (it was sometimes being reported as the format produced by an intermediate delegate program).
> - Fixes to color profiling of CMYK images.
> - Memory leak fixed in DrawClipPath().
> - Arc drawing is fixed.
> - Command-line parsing bug under Linux due to Linux's sscanfs inability to parse strings like "0x1" as "%fx%f" is fixed.
> - Scaling of 5 and 6-bit colors was slightly incorrect in BMP, AVI, DIB, and TIM datastreams.
> - GM utility now reports an error rather than silently returning if an unsupported sub-command is provided.
> - TIFF coder was writing 16-bit per sample RGB images incorrectly on little-endian CPUs.

Performance improvements:

> - Texture tiling is now 7X faster.
> - Color profile processing speed improvements for colormapped images.

Utilities enhancements:

> - For Unix, 'gm version' now includes a dump of the configure and build parameters.
> - Logging of thrown exceptions is now supported. Use '-debug exception'. This is useful to learn when and where errors are reported.
> - The -define option is added in order to support supplying additional options to coders without needing to add additional command line options or structure members.
> - The output of 'gm identify -verbose' now provides a nice dump of EXIF data.
> - The -sampling-factor option now accepts as many HxV pairs as there are JPEG components. Omitted ones default to 1x1.
> - The convert and montage commands now support an -operator command to perform arithmetic and bitwise operations on specified image channels.

Coder additions/improvements

> - The META coder supports wide characters for the IPTC and 8BIM formats.
> - The XTRN coder now supports wide characters.
> - An "IMAGE" coder is provided which provides access to a large number of images (derived from XFig) suitable for use as patterns, or as test images.
> - The "PATTERN" coder now returns an image pattern tiled to size (equivalent results to TILE:IMAGE:pattern). This is for ImageMagick compatibility.
> - The CINEON coder now supports reading and writing images in CINEON "CIN" linear gray and RGB formats. The read support is still very weak, but it works for common images.
> - The JPEG coder now estimates the original JPEG quality and sampling factors and will reuse these options when writing JPEG if the image is of the same type and the option "-define JPEG:preserve-settings" is supplied.
> - The JPEG-2000 coder now supports all Jasper library arguments using command line syntax similar to '-define jp2:rate=0.5'.
> - Reading and writting compressed SVG (SVGZ) is now supported.
> - The TXT coder now observes depth when writing.
> - The TIFF coder now outputs colormapped images with 1, 2, 4, and 8 bits per sample in order to provide much smaller file sizes for images with very few colors.
> - Many TIFF coder enhancements. Now reads colormapped and grayscale images at arbitrary (even odd) bits-per-sample sizes. Now properly supports an opacity channel (at any bits-per-sample value) for grayscale images. Bilevel grayscale images are treated similar to any other grayscale image unless CCITT FAX3/FAX4 compression is requested. Now allows the user to specify an arbitrary bits-per-sample value for grayscale images (even odd values) using "-define tiff:bits-per-sample=value". Now automatically stores the image as TrueColor RGB pixels if the image compression is set to JPEG. TIFF files are now written in using the TIFF library's default endian order rather than always big endian.
> - The WPG coder now renders embedded WMFs.
> - The PS3 coder is completely re-written to work much better and support more features (see ChangeLog).

Code structure enhancements:

> - Error handling has been improved and validated through testing. Some errors were being lost, unnecessarily ignored, or reported as something else entirely.
> - The number of error text messages to be maintained has been reduced by consolidating similar messages.
> - The memory allocator functions have been replaced with similar macros in order to eliminate warnings with GCC 3.3, avoid accidentally casting away const, and allow memory debuggers to report memory allocations and frees against the correct functions. The previously-used functions remain in the library for the purpose of compatibility.
> - <magick/xwindow.h> no longer depends on magick_config.h defines.
> - The text string localization code has been replaced with a simpler version written by Bill Radcliffe.
> - Added key,value "map" APIs (somewhat similar to C++'s <map>) for internal use.

API enhancements:

> - Incorporated John Cristy's Wand API's in a new GraphicsMagickWand library.
> - API definition is no longer dependent on types which vary in size (e.g. size_t) depending on large file compilation options. This means that applications may now be compiled without any special large file options and still work properly with the library.
> - Thrown exceptions (ExceptionInfo structure) now include source file, source line, function name, and current system error number.
> - The GetMagickInfoArray() function is added to replace use of GetMagickInfo() for code which needs to access the coder list. This is necessary since invoking GetMagickInfo() may re-order the coder list, causing problems for code which traverses the list. Using GetMagickInfo() to access individual list elements is safe.
> - Added the CopyException function to support copying exception info from one structure to another.
> - Added the ReplaceImageInList function to replace an image in an image list.
> - Added the DrawPeekGraphicContext function to access the current DrawInfo structure in the drawing context stack. Use of this function is not recommended since it voilates proper programming practices. It is added to support the Wand API's.
> - GetImageDepth() now returns an integral value between 1 and QuantumDepth and is no longer limited to the values 8, 16, and 32.
> - SetImageDepth() supports setting the image modulus depth to any integral value between 1 and QuantumDepth. This effects the effective numeric precision, not the storage depth, since the quantum storage type is still a Quantum.
> - GetImageChannelDepth() supports retrieving the modulus depth for a specified channel.
> - SetImageChannelDepth() supports setting the modulus depth for a specified channel.
> - ProfileImage is updated to handle alpha channels and grayscale images.
> - Added GetImageProfile() to retrieve a CMS profile from an image.
> - Added SetImageProfile() to attach a CMS profile to an image without adjusting the image pixels.
> - Added DeleteImageProfile() to remove a CMS profile from an image.
> - ConstituteImage() and DispatchImage() now support 'T' (transparency), 'O' (opacity), and 'P' (pad) options.
> - CompositeImage() now supports CopyCyanCompositeOp, CopyMagentaCompositeOp, CopyYellowCompositeOp, and CopyBlackCompositeOp, composition operators.
> - GetColorHistogram() obtains a color histogram for the image.
> - QuantumOperatorImage() and QuantumOperatorRegionImage() support arithmetic and bitwise operations on specified image channels.
> - The semaphore.h header is no longer installed or included in the API headers since these functions are private interfaces.
> - Configure using --enable-symbol-prefix or define PREFIX_MAGICK_SYMBOLS to use the C preprocessor to prefix all library symbols with "Gm". This prevents library symbol conflicts with other libraries.

PerlMagick fixes:

> - Adjusted a number of function option names so that they match the documentation.
> - Memory leak fixed.
> - Reading files (e.g. GIF) via a file descriptor is fixed.

Build improvements:

> - The TRIO library may be used to provide a replacement for vsnprintf if the C library doesn't provide it. This improves security on old systems.
> - Configure only configures for C & C++ languages.
> - Configure now does a better job of figuring out how to build a thread-safe library across multiple operating systems.
> - Configure incorporates a new mmap() test which tests the functionality which is needed so that mmap() is not unnecessarily rejected on a number of systems. This improves performance for large files on those systems.
> - Configure/build fixes for IBM's AIX operating system.

Windows-specific improvements:

> - The static install package now uses the "uninstalled" configuration so that it does not depend on the Windows registry in order to run. This allows files from the static install package to be copied to another computer without running an installer.
> - The executable search path is extended at run-time to include the directory where the CORE DLLs reside in order to ensure that they are found.
> - Adding the -t option to VisualMagick configure enables building all of the coders into one library in order to save build time and simplify linkage.
> - The XTRN coder now supports wide characters.
> - LCMS library updated to version 1.10.
> - GMDisplay displays a checkerboard pattern behind transparent images.
> - Support is provided for issuing log messages to the Windows standard logging system.
> - Project files are now provided for use with Borland C++ Builder 6.0.
> - Updated LCMS version to 1.12.
> - Updated FreeType version to 2.1.5.
> - Updated JBIG-KIT to version 1.5.
> - Updated libpng to version 1.2.5.
> - Updated libwmf to version 0.2.8.2.
> - Updates zlib to version 1.2.1.
> - ActivePerl 5.8.1 Build 807 now supported.
> - GraphicsMagick now compiles using Visual Studio .NET 2003.

# 1.0 (Released in May, 2003)

GraphicsMagick support services:

> - Master web site at "http://www.GraphicsMagick.org/".
> - Mailing lists, bug tracking, and forums available via "http://sourceforge.net/projects/graphicsmagick/".
> - CVSWeb via "http://cvs.graphicsmagick.org/cgi-bin/cvsweb.cgi/".
> - CVS via cvs.graphicsmagick.org (find instructions at "http://www.graphicsmagick.org/www/cvs.html").
> - FTP via "ftp://ftp.graphicsmagick.org/pub/GraphicsMagick".

Project maintenance improvements:

> - ChangeLog conforms to the GNU standard and all CVS commits include useful log messages.
> - CVS commit messages posted to graphicsmagick-commit mail list.
> - CVS commit messages contain CVSWeb URL references.

Footprint changes from ImageMagick:

> - Library -lMagick renamed to -lGraphicsMagick.
> - Library -lMagick++ renamed to -lGraphicsMagick++.
> - Utilities consolidated into a single 'gm' utility (e.g. use 'gm convert').
> - Script Magick-config renamed to GraphicsMagick-config.
> - Script Magick++-config renamed to GraphicsMagick++-config.
> - Headers installed under ${PREFIX}/include/GraphicsMagick.
> - PerlMagick namespace renamed from "Image::Magick" to "Graphics::Magick".
> - Pkgconfig files GraphicsMagick.pc and GraphicsMagick++.pc are installed in $libdir/pkgconfig to assist pkg-config users.
> - Coder modules installed to lib/GraphicsMagick-1.0/modules-Q8/coders.
> - Filter modules installed to lib/GraphicsMagick-1.0/modules-Q8/filters.

Many performance enhancements:

> - Default QuantumDepth is 8 since this is adequate for most purposes and more efficient than 16.
> - The Magick++ demo (compiled with QuantumDepth=8 and -O2) runs about 1.8X faster under SPARC/Solaris than the same demo with ImageMagick 5.5.4.
> - Colorspace transformations are much faster.
> - Grayscale/monochrome image handling is much faster.
> - PseudoClass image handling is faster.
> - Text annotations using FreeType are much faster.
> - Image file I/O is much faster.
> - RLE-compressed MIFF reading much faster.

Code structure enhancements:

> - All utility support functions moved to magick/command.c in order to significantly reduce link dependencies, allowing statically-linked programs to be smaller.
> - Use of MogrifyImage() elminated except for by utilities.
> - Re-builds due to changes to <magick/image.h> reduced by splitting the header into multiple headers.
> - ISO C '99 typedefs (gm_int16_t, gm_uint16_t, gm_int32_t, gm_uint32_t, gm_int64_t, gm_uint64_t) are available for use.

Feature enhancements:

> - Module loader always enabled for shared builds to allow extension.
> - Loading of arbitrary filter modules (via -process option) supported under Unix as well as Windows.
> - SVG coder allows specifying size and initial background color.
> - JPEG-2000 coder (JP2) updated to work with Jasper 1.7.
> - HWB and HSL image colorspace translation support.
> - JNG/MNG/PNG format support tracks ImageMagick version.
> - BMP encoder can write 16-color indexed BMPs now as well as 2-color BMPs (not restricted to monochrome).
> - TIFF decoder now includes optimized support for tiled and stripped TIFF.
> - The -random-threshold option (RandomThresholdImage()) is added to threshold an image to bilevel using random thresholding.

Major bug fixes:

> - 100% successful test completion at all quantum depths (8/16/32).
> - A temporary file management subsystem is added to ensure that all temporary files are removed before program exit. Temporary files are created and used in a secure fashion to avoid the possibility that a "trojan" temporary file (e.g. a symbolic link, or a file containing unsafe content) is created before a delegate has the chance to write to it. The environment variable MAGICK_TMPDIR allows the user to specify where temporary files are created without altering where other programs create their temporary files. Temporary filenames are created in 8+3 format to hopefully be more acceptable to ralcgm.
> - When dithering is disabled, don't dither when converting to a PseudoClass, grayscale, or monochrome image. Disabling dithering may cause these translations to be much faster.
> - PICON format works with BLOBs.
> - No longer removes input file when pinging a FlashPIX file.
> - Arc drawing and texture fill fixes from ImageMagick.
> - Sample, scale and affine fixes from ImageMagick.
> - MIFF colormaps are now scaled properly while reading.
> - CMYK translation works for QuantumDepth=32.
> - ConstituteImage now works properly for grayscale images.
> - Built-in tilde expansion and filename globbing now works properly.
> - InitializeMagick now registers signal handlers to ensure that resources are released before program exit. This helps avoid temporary file leaks due to the user using "CONTROL-C".
> - The installed <magick/magick_config.h> header now only contains the few definitions required by the API headers. This should significantly reduce or eliminate conflicts with other package headers.

Windows platform enhancements:

> - Configure updated for Visual C++ 7.0.
> - OLE object (ImageMagickObject) re-written to work with Visual C++ 7.0
> - New function, CropImageToHBITMAP(), to return a region of the image as a Windows HBITMAP.
> - Use vsnprintf to format strings under Windows (safer).

On November 19, 2002, GraphicsMagick was created as a fork of ImageMagick, several days before the ImageMagick 5.5.2 release.

The objectives of GraphicsMagick are to:

> - Use an open development model.
> - Encourage new developers to join the project.
> - Avoid unnecessary source code "churn".
> - Establish and preserve a stable API.
> - Use efficient coding practices which result in fast code.
> - Improve memory efficiency.
> - Use a release process which assures a working product.
> - Maintain an accurate ChangeLog.

Copyright (C) 2003 - 2009 GraphicsMagick Group

This program is covered by multiple licenses, which are described in Copyright.txt. You should have received a copy of Copyright.txt with this package; otherwise see http://www.graphicsmagick.org/www/Copyright.html.