# GraphicsMagick News

This file was last updated on January 6, 2009.

This release is a bug-fix release made from a stable maintenance branch and does not contain current new features.

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.

- 1.2.10 (January 6, 2010)
- 1.2.9 (September 16, 2009)
- 1.2.8 (September 4, 2009)
- 1.2.7 (January 16, 2009)
- 1.2.6 (November 17, 2008)
- 1.2.5 (July 26, 2008)
- 1.2.4 (June 29, 2008)
- 1.2.3 (June 5, 2008)
- 1.2.2 (May 28, 2008)
- 1.2.1 (May 5, 2008)
- 1.2 (April 29, 2008)
- 1.1 (Released April 4, 2004)
- 1.0 (Released in May, 2003)

# 1.2.10 (January 6, 2010)

Security Fixes:

> - Fix for CVE-2009-1882 "Integer overflow in the XMakeImage function".
> - Eliminate lockup due to hanging in loop while parsing malformed sub-image specification (SourceForge issue 2886560).
> - libltdl: Update libltdl to 2.2.6b in order to fix security issue. Resolves CVE-2009-3736 as it pertains to GraphicsMagick.

Bug fixes:

> - The pixel cache was not working properly for large pixel cache files (>2GB) under Linux. This limited the maximum image size which could be handled by a 32-bit application.
> - -convolve: Convolve does not accept an argument which looks like a geometry. Resolves SourceForge issue #2890923 "Different handling of -convolve between convert and mogrify".
> - -convolve: In the Q32 build, convolution kernel size was estimated incorrectly for large sigmas on 32-bit systems
> - -draw: Eliminate read access beyond end of array.
> - IPTC: Returned IPTC string values were one character too short.
> - JPEG: Work properly with IJG JPEG library version 7.
> - Magick++: Implementation fix for STL shadeImage function object.

Feature improvements:

> - TextureImage(): Matte channel indication is disabled if a texture is rendered under the image.
> - JPEG 2000: Fix reading/writing 12-bit JPEG 2000. Support ".j2k" as a file extension.
> - X11 display: If an image is TrueColor and has an opacity channel, then render it on top of a grid image to make the transparency more apparent.
> - Added MagickLibInterfaceNewest and MagickLibInterfaceOldest preprocessor defines so that applications may easily test for library versions while compiling.

Performance improvments:

> - None

# 1.2.9 (September 16, 2009)

Security Fixes:

> - None

Bug fixes:

> - Large embedded profiles (>32k, >64K, depending on writing software) read from JPEG files were being corrupted. This problem originated in GraphicsMagick 1.2.

Feature improvements:

> - None

Performance improvments:

> - None

# 1.2.8 (September 4, 2009)

Security Fixes:

> - BMP: Fix assertion thrown for BMP files with negative image height values. Resolves SF issue 2523536 "bug in bmp coder".
> - DIB: Fix assertion thrown for DIB files with negative image height values.
> - PCX: Detect improper rows, columns, or depth. Fixes CVE-2008-1097 "Memory corruption in ImageMagick's PCX coder".
> - SVG/rendering: Avoid access beyond end of array. Resolves SourceForge issue 2832125 "Crash on SVG conversion".
> - Random number generator initialization was insufficient, leading
> - to predictable temporary file names.

Bug fixes:

> - DPX: Fix leak of chroma image when subsampling to 4:2:2.
> - EPT, PDF, PS: PDF bounding box is sometimes incorrect or not globally applicable so don't specify bounding box when reading PDF files. Postscript files do need the bounding box so make sure that it is still supplied. Resolves SF tracker issue 2487651 "convert from pdf chops off rhs".
> - PNG: Ensure that opacity channel is properly initialized. Resolves SourceForge issue 2831240 "Possible alpha channel issue with PNG w/palette and tRNS".
> - TIFF: In some cases, RowsPerStrip needs to be a multiple of 16 for JPEG in TIFF so ensure that RowsPerStrip is a multiple of 16.
> - WMF: Eliminate memory leaks.
> - GetImageBoundingBox(): If we fail to find a smaller bounding box, then the returned bounding box is the entire image.
> - ReadMETAImage(): Fix memory leak of profile blob.
> - Magick++: Don't install Magick++ headers if Magick++ is disabled.
> - PerlMagick: Fix Ping of blob.
> - Utilities all: Input wildcard file specifications with a subdirectory component such as `"subdir/*.dpx"` were not working. Expand `@filename` to a list of arguments.
> - RPM spec file: The module .la files need to be installed as part of the base install or else the modules will fail to load.

Feature improvements:

> - -resize: When resizing a non-opaque image, attenuate the influence of surrounding colors based on their degree of transparency in order to avoid "halos" around objects caused by colors which are transparent and therefore not part of the visible image. Patch contributed by Pavel Merdin via SourceForge Tracker #2792322.

Performance improvments:

> - None

# 1.2.7 (January 16, 2009)

Security Fixes:

> - None.

Bug fixes:

> - VID: Eliminate memory leak.
> - montage: Eliminate use of freed memory.
> - delegates.mgk: Fix hang when co-process is invoked.
> - identify: Return comment text of any size.
> - ConvolveImage: Correctly log the convolution kernel used.

Feature improvements:

> - Convert: Re-implement -write so that it works in a useful fashion.

Performance improvments:

> - TIFF: Ping mode ('identify') is now really fast.

# 1.2.6 (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 composite gravity handling. Fix memory leaks. Fix return status.
> - Fix client name growth bug in benchmark command.
> - Add progress indication for rotations of 90 and 270 degrees.
> - +page now resets page offsets as one would expect.
> - The Magick++ build was supposed to be optional, now it really is.
> - Fix computation of MAGICK_LIB_VERSION so that it does not produce wrong results when a field becomes greater than '9'.
> - JP2: Leak a bit less memory. Does not fix existing leak in libJasper itself.

Feature improvements:

> - Resource listing output is more complete.

Performance improvments:

> - Removed a poorly-placed memset() which considerably diminished the performance of some algorithms.
> - Fixed FuzzyColorMatch() so that it does not waste CPU time. Should speed 'trim' and floodfill.

# 1.2.5 (July 26, 2008)

Security Fixes:

> - None.

Bug fixes:

> - TIFF: Eliminated a memory leak in the codec support detection code.
> - JPEG: Removed over-write of image->client_data.
> - PNG: Fixed crash when writing PNG images with transparency and either optimize is requested, or the image is colormapped.

Feature improvements:

> - A file extension proxy module is used to automatically map from common camera raw format extensions to dcraw so that camera RAW images are loaded automatically using 'dcraw' or similar program as defined via the 'dcraw' entry in delegates.mgk.
> - ThresholdImage() uses a new implementation backported from the development version which attempts to avoid unnecessary image updates.

# 1.2.4 (June 29, 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.

Bug fixes:

> - Magick++ Image Quantize was not supporting error measurement properly and was wasting time with redundant SyncImage().
> - The --enable-magick-compat configure option was not being respected by the Makefiles (SourceForge bug 2005883).

# 1.2.3 (June 5, 2008)

Security Fixes:

> - 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.

Security Issue Not Fixed:

> - JP2/JPC reader: Several JPEG-2000 files from Sami Liedes "broken" collection cause crashes in Jasper. This is not GraphicsMagick's fault.

Bug fixes:

> - Noise generators were only working properly for Q8 build.

# 1.2.2 (May 28, 2008)

Bug fixes:

> - Documentation is now installed according to the conventions established by the configure script. This results in documentation being installed under /usr/local/share/doc/GraphicsMagick by default.
> - HWB colorspace now works correctly.
> - Composition with CopyOpacity now produces an image with transparency (as expected).
> - Composition now preserves the canvas colorspace.
> - Composition with a displacement map (-displace) no longer leaks an image.
> - Composition now handles CopyBlack properly for CMYK images.
> - Alpha composition now works as expected when both pixels involved include transparency.
> - -gamma multiple channel syntax now works as documented.
> - PerlMagick: Dissolve composition with Opacity now works correctly.
> - TIFF: Was accidentially converting CMYK images to RGB.
> - TIFF: Reject JPEG compression when writing CMYK images.
> - Should now compile with Visual C++ 2008.
> - Detects libbz2 and libxml2 and builds properly with them in a MinGW build.

Performance improvments:

> - Exploratory support for OpenMP in the image resize code. Can result in significant performance improvement when significantly reducing the image size on multi-core systems, but little to no improvement when the input and output images are close to the same size. Add --enable-openmp to the configure options to enable using OpenMP.

Feature improvements:

> - Composition now supports CopyCyan, CopyMagenta, CopyYellow, and CopyBlack in order to copy CMYK channels into an image. CMYK copy composition operators automatically set the image colorspace to CMYK so that everything just works.

# 1.2.1 (May 5, 2008)

Bug fixes:

> - MAT: Provide a correct error report when the Pixels limit has been exceeded.
> - RPM Spec file: Fixed naming of NEWS file. Use included libltdl (--with-included-ltdl option) in order to avoid possible issues with system libltdl.
> - GraphicsMagick-config script should now output correct dependency information for --libs when libltdl is needed.
> - GraphicsMagick++-config no longer depends on GraphicsMagick-config to be in the executable search path.

Performance improvments:

> - Module loading and execution performance are improved considerably for the modules build. On some systems, the modules build is considerably faster than the static or shared builds.

Feature improvements:

> - Updated to libtool 1.2.4.

# 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.