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0001 September 17, 2019: Release 1.16 0002 0003 This release consists of bugfixes and minor portability improvements. 0004 A potential arithmetic overflow was fixed. Rotation angles are now 0005 normalized to between -180 and 180. We now use binary file I/O on the 0006 OS/2 platform. The test suite tolerances were adjusted. The 0007 configuration option --enable-local-getopt was renamed as 0008 --with-included-getopt. Some build system improvements. Thanks to 0009 Henri Salo and Dave Yeo for reporting bugs and suggesting 0010 improvements. 0011 0012 August 5, 2017: Release 1.15 0013 0014 This release consists of bugfixes and minor portability improvements. 0015 Some potential buffer overflows and arithmetic overflows were fixed, 0016 including CVE-2017-12067. A bug triggered by very large bitmaps has 0017 been fixed. A new configuration option --enable-local-getopt was 0018 added. Thanks to Agostino Sarubbo, Daniel Macks, and Michael Voříšek 0019 for reporting bugs and suggesting improvements. 0020 0021 February 19, 2017: Release 1.14 0022 0023 This release consists of bugfixes and minor portability improvements. 0024 A number of bugs triggered by malformed BMP files have been fixed, 0025 including CVE-2016-8685 and CVE-2016-8686. Error reporting has been 0026 improved. The image size is now truncated when the bitmap data ends 0027 prematurely. It is now possible to use negative dy in bitmap 0028 data. Portability has been improved to encompass C++11. The default 0029 compiler is now clang if available. Thanks to Nelson Beebe and Martin 0030 Gieseking for reporting portability issues, and to Agostino Sarubbo 0031 for reporting bugs. 0032 0033 October 22, 2015: Release 1.13 0034 0035 Some critical bugs in the processing of BMP files were fixed. These 0036 bugs allowed the program to be crashed, or potentially to be abused 0037 in other ways, by feeding it specially crafted BMP files. Thanks to 0038 Tomasz Buchert and Agostino Sarubbo for reporting these bugs. 0039 Portability was improved for C99 and for MSVC++. Thanks to Peter 0040 Breitenlohner, Nelson Beebe, and Martin Gieseking for reporting 0041 portability issues. 0042 0043 March 24, 2015: Release 1.12 0044 0045 Fixed memory overflow bug triggered by very large bitmaps. Fixed 0046 binary file mode on 64-bit Windows. Portability improvements. 0047 0048 February 19, 2013: Release 1.11 0049 0050 A GeoJSON backend was added; thanks to Christoph Hormann for 0051 contributing this. Support for bitfields in the BMP format was 0052 added. A minor change was made to the behavior of the alphamax 0053 parameter; a value of 0 now gives a true polygon. 0054 0055 August 19, 2011: Release 1.10 0056 0057 A DXF backend was added. The output is in the drawing interchange 0058 format used by computer aided design software. Thanks to Jonas 0059 Benedett Dorr for testing. The Gimppath backend was changed to be 0060 compatible with current versions of Gimp. The EPS, PDF, and SVG 0061 backends now use high-resolution bounding boxes. The default scaling 0062 of the EPS, PDF, and SVG backends is now fixed at 72dpi. A new option 0063 --flat was added to the SVG backend. A new option --tight was added 0064 to remove whitespace around the input image before calculating its 0065 scaling and placement. 0066 0067 December 21, 2010: Release 1.9 0068 0069 The xfig and eps backends were improved, and a fixed pagesize PDF 0070 backend was added. Support for BMP version 4 and version 5 files, as 0071 well as top-down BMP files, was added. Minor speed improvements to 0072 Potrace and major speed improvements to mkbitmap. A Gaussian blur 0073 option was added to mkbitmap. Libtool is now used to build and 0074 optionally install the Potrace library. An optional simplified 0075 progress bar was added for dumb terminals. This release also contains 0076 some portability improvements, cross-compilation improvements, and 0077 minor bug fixes. 0078 0079 April 9, 2007: Release 1.8 0080 0081 This release contains minor bugfixes and portability improvements. 0082 Rotation is now implemented in the PDF backend. 0083 0084 March 6, 2005: Release 1.7 0085 0086 This is a bugfix release. A bug in the progress bar code, which 0087 caused arithmetic exceptions on some 64-bit architectures, has been 0088 fixed. 0089 0090 February 27, 2005: Release 1.6 0091 0092 This release contains an algorithm improvement that leads to a 0093 speedup of 20-60% over previous versions of Potrace. A new PDF 0094 backend was added, courtesy of Tor Andersson. An option --progress 0095 was added for displaying a progress bar. The Windows version of 0096 Potrace now uses MinGW instead of Cygwin, eliminating the need to 0097 install a special DLL alongside the executable programs, and solving 0098 some problems with wildcards and executable PostScript files. Some 0099 spurious "premature end of file" messages were eliminated. The 0100 core functionality of Potrace was separated into a library with a 0101 documented API, making it easier for developers to incorporate 0102 Potrace into other GPL-licensed software. 0103 0104 July 8, 2004: Release 1.5 0105 0106 The LZW patent has finally expired in Canada. Therefore, postscript 0107 level 2 compression can now be implemented directly within Potrace, 0108 without having to rely on the external "compress" program. This 0109 release makes the necessary corrections. 0110 0111 March 6, 2004: Release 1.4 0112 0113 This is a bugfix release. Fixed the bug which sometimes caused 0114 Potrace to "hang" on large input files. Also fixed some bugs in the 0115 compression code. The presence of the "compress" program is now 0116 determined at run-time, rather than compile-time. No new features or 0117 command line options were added. 0118 0119 January 15, 2004: Release 1.3 0120 0121 This is primarily a bugfix release. Version 1.2 fatally crashed when 0122 applied to an empty (all white) bitmap. The options -2 and -3 are now 0123 ignored when unsupported, rather than causing an error. There were 0124 some improvements to the test suite, autoconfiguration, and 0125 portability. The bounding box in the xfig backend was fixed, and the 0126 postscript output now has better page encapsulation. Bitmaps of 0127 dimension 0 are now tolerated better. 0128 0129 December 23, 2003: Release 1.2 0130 0131 New experimental Gimppath and XFig backends were added. A separate 0132 program mkbitmap was added, which can be used as a preprocessor to 0133 Potrace. It turns greyscale or color images into high-quality 0134 bitmaps with optional scaling and filtering. New options --opaque, 0135 --group, and --fillcolor were added for greater flexibility in 0136 generating editable PostScript and SVG output. The bitmap 0137 decomposition algorithm was improved and can now take advantage of 0138 64-bit platforms. Portability and autoconfiguration were vastly 0139 improved, and a test suite was added. Runlength encoded BMP files can 0140 now be read. Some bugs in command line options were fixed. 0141 0142 August 18, 2003: Release 1.1 0143 0144 The most important new feature of this release is an SVG (scalable 0145 vector graphics) backend. This file format can be read by vector 0146 graphics manipulation programs such as sodipodi, as well as web 0147 browsers with an SVG plugin. I also added PGM, PPM, and BMP as 0148 additional input file formats. The new --blacklevel and --invert 0149 options control how non-black-and-white images are converted to 0150 bitmaps before being processed by Potrace. The implementation of a 0151 critical function has been improved to make Potrace even faster on 0152 large input files; this results in speedups of up to factor 3.3 0153 relative to Potrace 1.0. Autoconfiguration was improved, and the code 0154 was polished to compile on more different architectures. The error 0155 messages for wrong file formats were also improved. 0156 0157 August 10, 2003: Release 1.0 0158 0159 First public release.