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OVERVIEW -------- GNU Unifont is an official GNU package. It is a dual-width bitmap font, 16 pixels tall by 8 or 16 pixels wide. Experimental use of 24 and 32 pixel wide glyphs is also supported by some utility programs; consult the man pages and texinfo documentation. Unifont is designed to provide coverage for all of Unicode Plane 0, the Basic Multilingual Plane (BMP). GNU Unifont has a glyph for each visible code point in the Unicode Basic Multilingual Plane (Plane 0) and some glyphs in the Supplemental Multilingual Plane (Plane 1). This version also includes many glyphs in Michael Everson's ConScript Unicode Registry (CSUR). Unifont only provides a single glyph for each character, making it impossible to handle any language properly that needs context-dependent character shaping. It is supplied in the form of a hex file, with a converter to convert it to BDF. See http://czyborra.com/unifont/ or http://unifoundry.com/unifont.html for more information. The BDF font is converted to PCF, and the hex file is converted to a TrueType font. This is the unifoundry.com collection of utilities for GNU Unifont, assembled by Paul Hardy with the encouragement of the font's creator, Roman Czyborra. This archive contains the following directories and files: ChangeLog Log of changes made to each GNU release COPYING Full text of GPL version 2 doc Documentation in Texinfo format font The font source file with scripts for building hangul Standalone font sources to build hangul-syllables.hex INSTALL Instructions for font and software installation Makefile The "make" file man Unix man pages NEWS Summary of what's new with each GNU release README This file src Source programs, in Perl and C The "font/precompiled" directory contains prebuilt font-related files: coverage.txt Percentage coverage of Plane 0 scripts unifont-<version>.hex Hex string source of glyphs to build Unifont unifont-<version>.bdf.gz BDF version of Unifont unifont-<version>.pcf.gz PCF version of Unifont unifont-<version>.ttf TrueType version of Unifont unifont_jp-<version>.* Version of Unifont with Japanese glyphs mapped from Plane 1 and Plane 2 of the JIS X 0213 standard to Unicode. The TrueType version includes those Unicode Plane 2 glyphs that appear in JIS X 0213. unifont_sample-<version>.hex Hex string source of all Plane 0 glyphs (except those for U+FFFE and U+FFFF), including nonprinting and PUA glyphs, with combining circles unifont_sample-<version>.bdf.gz BDF font version of the above .hex file unifont_sample-<version>.ttf SBIT font version of the above .hex file unifont_csur-<version>.* Fonts containing Plane 0 Unifont glyphs plus glyphs for Michael Everson's ConScript Unicode Registry (CSUR) for the Plane 0 Private Use Area unifont_upper-<version>.* Fonts containing glyphs from Unicode Plane 1 through Plane 14, inclusive unifont_upper_csur-<version>.* Fonts containing glyphs from Unifont Upper plus glyphs from Michael Everson's ConScript Unicode Registry (CSUR) that are in the Private Use Area in Plane 15 Unifont-APL8x16-<version>.psf.gz Monospace console font for using APL (GNU APL, etc.) in single-user mode. unifont-<version>.bmp The entire Plane 0 Unifont font with combining circles, built from the files font/plane00/*.hex, showing combining circles The directory that was originally named "font/hexsrc" has been renamed to "font/plane00" now that Unifont supports glyphs beyond Plane 0. Higher plane glyphs appear in "font/plane01" through "font/plane0F". Currently there is no "font/plane10" directory (the highest Unicode plane is Plane 17, or 0x10). This release incorporates all glyph errata issued by The Unicode Consortium from Unicode 1.0 errata to the latest. BUILDING -------- See the "INSTALL" file in this directory for building instructions. src/ AUTHORS ------------ Roman Czyborra wrote all the Perl files in the src directory except "hex2sfd", "hexkinya", "unifontchojung", "unifontksx", "unihex2png", and "unipng2hex". In the case of "johab2ucs2", Jungshik Shin wrote the orignial version; he then gave it to Roman. Paul Hardy made further changes to "johab2ucs2". Roman originally named the "src/hexbraille" script as simply "braille". Paul Hardy thought there was too great a chance of a name conflict with other utilities, and so renamed it. Luis Alejandro Gonzalez Miranda wrote the original "hex2sfd" Perl script, as well as a "howto-build.sh" shell script that Paul Hardy converted into "./font/ttfsrc/Makefile". Paul Hardy wrote "unifontchojung" and "unifontksx" for extracting subsets of Hangul glyphs, as an aid in creating a new Hangul Syllables block. Andrew Miller wrote "hexkinya". He also wrote "unihex2png" and "unipng2hex" based upon Paul Hardy's "unihex2bmp" and "unibmp2hex" programs. Last but not least, he wrote the "unifont-viewer" Perl script to graphically view a Unifont hex file dynamically. Paul Hardy wrote all the C programs. Unifont AUTHORS --------------- Roman Czyborra created the original GNU Unifont, including the .hex format. For greater detail, see the HISTORY section below. David Starner aggregated many glyphs contributed by others and incorporated these into pre-2004 Unifont releases. Qianqian Fang began his Wen Quan Yi font in 2004, by which time work on Unifont had stopped. Most of the almost 30,000 CJK ideographs in Unifont versions 5.1 and later were taken from Wen Quan Yi with permission of Qianqian Fang. The glyphs in "./font/plane00/wqy-cjk.hex" are for the most part Qianqian Fang's Unibit and Wen Quan Yi glyphs. Paul Hardy drew most of the newly-drawn glyphs added to the BMP from the Unifont 5.1 release to the present release. This includes the 11,172 glyphs in the Hangul Syllables block, plus approximately 10,000 additional glyphs scattered throughout the BMP. Andrew Miller drew the glyphs added to Unicode 6.3.0. For higher planes and the Private Use Area glyphs, see the ChangeLog file. LICENSE ------- The source code for everything except the compiled fonts in this current release is licensed as follows: License for this current distribution of program source files (i.e., everything except the fonts) is released under the terms of the GNU General Public License version 2, or (at your option) a later version. GPL version 2 is contained in the "COPYING" file in the main source directory for this package. If your received this source without a copy of GPL version 2, you can download a copy from GNU's website at http://www.gnu.org/licenses/gpl-2.0.html. The license for the compiled fonts is covered by the above GPL terms with the GNU font embedding exception, as follows: As a special exception, if you create a document which uses this font, and embed this font or unaltered portions of this font into the document, this font does not by itself cause the resulting document to be covered by the GNU General Public License. This exception does not however invalidate any other reasons why the document might be covered by the GNU General Public License. If you modify this font, you may extend this exception to your version of the font, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version. See "http://www.gnu.org/licenses/gpl-faq.html#FontException" for more details. CHANGES IN VERSION 6.3 ---------------------- Version 6.3 reflects all glyph changes and errata published in Unicode 6.3.0. In preparation for releasing this version, Paul Hardy obtained a hard copy of the errata published in Unicode Version 1.1, not yet available on Unicode's website. All previously published errata have been incorporated. This is a complete replacement for all previous releases. The following code points in previously published errata were examined and found to be correct: Unicode 1.1: U+717F, U+773E, U+809C, U+8480, U+908E Andrew Miller drew the 5 new additions to the Unicode 6.3.0 Basic Multilingual Plane in the initial Unifont 6.3 release. The latest Unifont 6.3 release includes these glyph changes by Paul Hardy: - Armenian -- several glyphs were redrawn based upon feedback from native speakers (U+0530..U+058F). - CJK Radicals Supplement -- several glyphs were redrawn to better match their representations in The Unicode Standard code charts: U+2E9F, U+2EA9, U+2EAC, U+2EAE, U+2EC0, U+2EDE, U+2EE7, and U+2EED. - Capricorn sign (U+2651) -- this was redrawn to an alternate form that better fit in an 8 by 16 pixel grid. - Dashes -- changed to distguish better between different dash types (a two horizontal pixel difference is the minimum to easily distinguish a difference between two glyphs): * Hyphen (U+002D) and Soft Hyphen (U+00AD) are now 4 pixels wide * En Dash (U+2012) is now 6 pixels wide * Em Dash (U+2013) is now 8 pixels wide - Control Pictures: * Centered text for C1 Controls U+0089 ("HTJ"), U+0095 ("MW"), and U+009E ("PM") * Copied glyphs from U+0000..U+001F to U+2400..u+241F and erased surrounding borders; earlier, some glyphs in U+0000..U+001F had their text re-centered so this carries that change forward - Arrows -- General Re-alignment * Aligned most single vertical arrow strokes with the 5th column, counting from the left, to align with the center of the "w" glyph (U+0077) * Aligned most single horizontal arrow strokes with the 7th row, counting from the bottom, to align with the horizontal stroke in the "e" glyph (U+0065); this follows the convention of Donald Knuth's fonts in TeX, as illustrated in The TeXbook * Modified the following ranges per the above two re-alignments: o U+2190..U+21FF Arrows o U+27F0..U+27FF Supplemental Arrows -- A o U+2900..U+297F Supplemental Arrows -- B o U+2B00..U+2BFF Miscellaneous Symbols and Arrows - Modified the following additional Miscellaneous Technical glyphs * Scan lines for old 9-line character terminals: o U+23BA Line 1, horizontal line across row 1 (counting from the top) o U+23BB Line 3, horizontal line across row 5 (counting from the top) o U+23BC Line 7, horizontal line across row 12 (counting from the top) o U+23BD Line 9, horizontal line across row 16 (counting from the top) * U+23CE Return Symbol: shortened to match Latin capital height * U+23AF Horizontal Line Extension: aligned on 7th row, counting from the bottom * U+23D0 Vertical Line Extension: aligned on 5th column, counting from the left * U+23DA Ground Symbol: aligned with Vertical Line Extension (U+23D0) * U+23DB Fuse Symbol: algined with Horizontal Line Extension (U+23AF) * U+23EC Black Down-pointing Double Triangle: moved down one row to match Latin capital height - Swapped U+FE17 and U+FE18, which had been reversed - hangul/ directory -- updated "hangul-generation.html" to match the latest version at http://unifoundry.com/hangul/hangul-generation.html Five new utility programs have also been added: - unifontpic - creates a bitmapped graphics (.bmp) file of the entire Basic Multilingual Plane (Plane 0), by default in a 256-by-256 glyph grid for ease of printing, and optionally in a 16-by-4096 glyph grid for easier scrolling on a screen, for software that can handle a .bmp file with over 64k pixel rows (not all software can). The 256-by-256 glyph grid can be scaled to print on a piece of paper approximately 3 feet by 3 feet (or one meter by one meter). Written by Paul Hardy. - unigencircles - adds dashed combining circles to unifont.hex glyphs for code points that are in "font/ttfsrc/combining.txt" but not in "font/plane00/nonprinting.hex". Written by Paul Hardy. - unigenwidth - creates an implementation of the POSIX functions wcwidth() and wcswidth() as specified in IEEE 1003.1-2008, Vol. 2: System Interfaces, Issue 7, pages 2251 and 2241, respectively. Plane 0 widths are determined by reading the current Unifont glyphs. All higher planes, 0x01 through 0x10, are calculated without regard to Unifont glyphs. This can be modified in the future if Unifont glyphs extend beyond Plane 0. Written by Paul Hardy. - unihex2png - converts a unifont.hex-format file into a Portable Network Graphics (PNG) file for editing with a wider rane of graphics editors than the original unihex2bmp allowed. Written by Andrew Miller, based upon the unihex2bmp source code. Introduced in Version 6.3.20131215. - unipng2hex - converts a PNG graphics file created by unihex2png back into a unifont.hex-format file. Written by Andrew Miller, based upon the unibmp2hex source code. Introduced in Version 6.3.20131215. The last two program additions, unihex2png and unipng2hex, also support glyph heights of 24 and 32 pixels in addition to Unifont's original height of 16 pixels. hex2bdf and hexdraw have also been modified to support these alternate glyph heights. This capability has not been tested extensively, and for now is considered experimental. CHANGES IN VERSION 6.2 ---------------------- After release of version 5.1 of Unifont, it was learned that the replacement glyphs used in Hangul Syllables, although free to use, could never be licensed under any version of GPL. For that reason, Paul Hardy created a set of Hangul Syllables from scratch with the oversight of some native Koreans. This was done using the files that appear in the "hangul/" directory. For a detailed discussion of the process, see http://unifoundry.com/hangul/hangul-generation.html The new font was released as Unifont 6.2, with representation of all glyphs in the Unicode 6.2 BMP. As a result of replacing the Hangul Syllables block, this was the first release that provided GPLv2+ coverage (with a font embedding exception) for the entire package. The Unicode Consortium released Unicode Version 6.2.0 on 22 April 2013. This version of Unifont includes all additions to the BMP since Unicode Version 5.1, and adds 1,328 more glyphs to the Basic Multilingual Plane. It also incorporates all errata that the Unicode Consortium published that apply to the BMP from Unicode 3.0 errata through Unicode 6.1 errata (listed with the Unicode 6.2.0 release). Only one erratum was left unmodified: the Ogham Space glyph, U+1680, which was left as a line stroke because of the rendering limitations of the bitmapped Unifont. The errata for the following glyphs were examined and if necessary corrected: Unicode 3.1: U+066B, U+224C, U+1780..U+17E9 Unicode 3.2: [none] Unicode 4.0: U+06DD, U+0B66 Unicode 4.1: U+01B3, U+031A Unicode 5.0: U+0485, U+0486, U+06E1 Unicode 5.1: U+047C, U+047D, U+075E, U+075F, U+1031, U+1E9A, U+1460, U+147E, U+2626 Unicode 5.2: U+04A8, U+04A9, U+04BE, U+04BF, U+135F, U+19D1, U+19D2, U+19D4 [U+1680 left as is] Unicode 6.0: [none] Unicode 6.1: U+2D7F Note that some glyphs were assigned in earlier versions of Unicode and later withdrawn, but their glyphs still appear in the code charts. Therefore, they have been left in place. The Unicode Consortium now holds the position that once a glyph is assigned, it is not replaced. Andrew Miller noted that one glyph (U+2047) was incorrect and the glyph CYRILLIC CAPITAL LETTER A (U+0410) did not match LATIN CAPITAL LETTER A (U+0041). He submitted corrections and they have been incorporated. The biggest change was a totally redrawn set of Hangul Syllables, U+AC00..U+D7A3, comprising 11,172 glyphs in all. This allowed the entire font to be licensed under the GNU GPL. Unicode 6.2 (and hence Unifont) now only has 2,330 unassigned code points in the BMP for possible future assignments, and the rate at which new code points are being assigned in the BMP is decreasing greatly. The unihex2bmp program has reversed the meaning of its "-f" (flip, or transpose) flag compared to Unifont Version 5.1 unihex2bmp. Now the default behavior is to produce 16x16 glyph charts with the same arrangement as The Unicode Standard. The unibmp2hex program now hard-codes several scripts and code points to be double-width. This was necessary after removing the combining circles from many glyphs that only occupied the left-hand side of the 16x16 grid, but combine with double-width glyphs from the rest of a given script. The "blanks.hex" file has been renamed to "unassigned.hex" as a more accurate description of its contents. The "substitutes.hex" file has been renamed to "spaces.hex", as all it contained were single- and double-width space glyphs (strings of 0s). Roman Czyborra and Paul Hardy wanted to license this entire collection under GPL to simplify its adoption by the GNU Project. In the end, there was just one catch: the Hangul Syllables block that appeared in Unifont 5.1, although licensed for free use, could not be licensed under the GPL. There was no suitable alternative that was covered under the GPL, so Paul Hardy created a new block of Hangul Syllables. This took a few years of spare time to complete. Native Koreans reviewed and critiqued the glyphs. If anyone who is Korean would like to improve this block (U+AC00..U+D7A3), please feel free to do so and submit the changes so they can be incorporated. The font has also gone through a couple of simplifications since the release of version 5.1: - There is only one source file for CJK ideographs now, "wqy.hex", acknowledging that most of these glyphs were taken from the Wen Quan Yi distribution. - There are no more combining circles; these were all removed. The result is now there is just one variation of output font rather than four. That one is used to generate the TrueType "unifont.ttf" font. The directory "font/plane00" contains the .hex input files for building Unifont, and contains these files: hangul-syllables.hex Unicode Hangul Syllables, U+AC00..U+D7A3 nonprinting.hex Format and other assigned but invisible glyphs pua.hex Private Use Area glyphs README The README file spaces.hex Code points that are space glyphs unassigned.hex Unassigned code points in the BMP unifont-base.hex Source file with almost all BMP scripts wqy.hex Source file with Wen Quan Yi CJK ideographs The file previously named "blanks.hex" is now named "unassigned.hex". These "blank" glyphs are no longer included in the compiled font. Although the Unicode Standard specifically allows a visual rendering of unassigned code points, doing so would prevent a display engine finding a glyph in another font. In fact, the original "blanks.hex" pattern was modeled after the proposed representation of unassigned code points depicted in The Unicode Standard, Version 5.0, Section 5.3, Unknown and Missing Characters (p. 155). Incorporating "blanks.hex" (now "unassigned.hex") was invaluable in spotting assigned code points with glyphs that had not yet been drawn. However, now there is complete coverage of the entire BMP, with only about 2,300 BMP code points remaining out of 65,536 that could potentially be given assignments in the future, so the great bulk of work on the BMP is done. The "pua.hex" file contains a four-digit hexadecimal representation of each code point, rendered as white on black. The new program "hexgen.c" generated these glyphs. A four-digit hexadecimal code point is suggested as one possible rendering of PUA glyphs in The Unicode Standard, Version 5.0, Section 5.3. Another possible rendering suggested in that same section is a pencil glyph. A pencil glyph was used originally in Unifont Version 5.1. The glyphs in "pua.hex" are not compiled into the final font. To do so, modify font/Makefile by adding "pua.hex" to the list of hex source files. Alternatively, someone could use their own pua.hex file for various Private Use Area assignments. UNIFONT VERSION 5.1 ------------------- Paul Hardy's first release of Unifont and associated graphics utilities was Version 5.1. This corresponded to Unicode Version 5.1 (the current version at the time), with a glyph for every visible character in the Unicode 5.1 Basic Multilingual Plane. For the Unifont 5.1 release, Paul Hardy replaced the 11,172 thick-stroke Hangul Syllables glyphs with thin-stroke glyphs (a desire expressed by Roman Czyborra for years), merged Qianqian Fang's unibit and Wen Quan Yi glyphs into GNU Unifont (with lots of help and enthusiasm from Qianqian Fang), drew about 8,500 more glyphs to provide complete coerage of the BMP, and replaced the existing Tibetan glyphs with new ones contributed by Rich Felker. There was a bug in the johab2ucs2 Perl Script that formed one range of Hangul Syllables incorrectly in previous releases. Paul Hardy noticed and fixed the bug for the Unifont 5.1 release. All previous releases of Unifont have an incorrectly formed Hangul Syllables block. Earlier releases also had an incorrectly formed Braille glyph block. There was a bug in the Perl script that drew the Braille glyphs in earlier releases. Roman Czyborra made a fix to that Perl script, named "braille" at his website (http://czyborra.com). The revised script ("hexbraille") was included in the Unifont 5.1 release, and used to generate the Unifont 5.1 Braille glyphs. HISTORY ------- Roman Czyborra <[email protected]> began GNU Unifont in 1998 as a low quality font to provide a glyph for every Unicode character in the Basic Multilingual Plane. He realized that no one font at the time had complete coverage of the Unicode BMP. http://czyborra.com still has several cool tools for Unifont not included here. Since Roman Czyborra was unable to maintain the Unifont for a while, and many patches existed on [email protected] (http://groups.yahoo.com/group/gnu-unifont), David Starner <[email protected]> decided to make a new release extending Unifont with many characters in 1999. That was the foundation of earlier GNU Unifont compilations from 1999 to 2004. By 2004, work on Unifont had stopped. Qianqian Fang wanted to create a high-quality Chinese Unicode font in 2004. He began by copying the GNU Unifont glyphs. He replaced its Latin glyphs with those of another X11 font. He replaced the existing main CJK ideographs with a higher quality font that the People's Republic of China had placed in the public domain. Qianqian named this new font "unibit", and released it under the terms of the GNU General Public License (GPL) version 2, with the exception that embedding his font in a document did not by itself bind that document to the terms of the GNU GPL. See http://wqy.sourceforge.net/cgi-bin/enindex.cgi (English) or http://wenq.org (Chinese) for more information on Wen Quan Yi. In late 2007, Paul Hardy became interested in adding to GNU Unifont. He wrote a couple of programs to convert GNU Unifont .hex files to and from bitmap images for easy editing with any graphics software. He began by combining the latest glyphs available for GNU Unifont. This starting point was posted at http://czyborra.com as the 2007-12-31 version of unifont.hex. Shortly after that, Roman Czyborra's website went down. Paul Hardy then started posting complete copies of GNU Unifont on his website, at "http://unifoundry.com/unifont.html". Roman Czyborra encouraged Paul Hardy to continue this work on GNU Unifont. In early 2008, Paul Hardy learned of Qianqian Fang's work. Qianqian encouraged a combining of effort, and Paul Hardy at that point created two versions of GNU Unifont: one with the original Chinese ideographs (which Roman Czyborra copied from a Japanese font in the public domain), and one with Qianqian Fang's Wen Quan Yi (Spring of Letters) ideographs. The Wen Quan Yi font provides far more coverage of CJK ideographs than the original Japanese font did, and is of higher quality. Paul Hardy created a version of both the font with the original CJK ideographs from Japan and with CJK ideographs from Wen Quan Yi that contained combining circles. He then wrote a post-processing program to remove the combining circles from the final font. In 2005, Luis Alejandro Gonzalez Miranda (http://www.lgm.cl) created a set of Fontforge scripts and Perl programs to build a TrueType font from unifont.hex. Paul Hardy modified Luis' software in 2008 to cover the full Unicode 5.1 Basic Multilingual Plane range. Luis gave Paul Hardy permission to release this modified version under the terms of "the GNU General Public License, version 2 or (at your option) a later version." On 4 July 2008, Paul Hardy was looking through all of Roman Czyborra's Perl scripts. One of these, "braille", contained a comment from 2003 that the original GNU Unifont did not generate its Braille patterns (U+2800..U+28FF) correctly. The modified script fixed that bug. Paul Hardy incorporated the corrected Braille glyphs into the 6 July 2008 release of GNU Unifont. All previous versions probably contain this Braille bug and should be replaced. Other notable additions include: - Incorporation of CJK glyphs from Qianqian Fang's fonts - Incorporation of Rich Felker's Tibetan glyphs - Replacement of the Hangul Syllables block with a thin stroke font (Roman had mentioned wanting to do this someday on his website), the current version being created from scratch by Paul Hardy - Addition of circled pencil glyphs for the Private Use Area (suggested as an acceptable rendering in the Unicode 5.0 Standard), now replaced with optional four-digit hexadecimal code point glyphs; thought not built into the final font by default, they are available in "font/plane00/pua.hex" - Replacement of the Unifont 5.1 gray box glyphs for unassigned code points with four-digit hexadecimal glyphs; these are built into the final font by default - Proper handling of combining characters in the TrueType version - Proper handling of space glyphs in the TrueType version The hex2bdf script in this release is Roman's original script, not the modified version that produced two BDF files (one for 8 pixel wide glyphs and another for 16 pixel wide glyphs). The TrueType font should be used in preference to the BDF font, so this is probably a moot point. For the Unifont 6.2 release, Qianqian Fang gave Paul Hardy permission to release the subset of Wen Quan Yi glyphs included in Unifont under GPLv2+, with a font embedding exception. With the newly-drawn Hangul Syllables block, this allowed the entire font to be released under GPLv2+ with a font embedding exception. OPEN ISSUES ----------- * Some CJK ideographs use an entire 16x16 pixel grid. This leaves insufficient space between lines. However, changing to a non-square grid would distort the block drawing glyphs. The best solution is probably to use GNU Unifont for mostly non-CJK glyph rendering, and to use Qianqian Fang's Wen Quan Yi fonts (http://wenq.org) for predominately CJK glyph rendering. The Wen Quan Yi fonts use extra leading (blank space) between lines. * There are still some Control and Format glyphs in "unifont-base.hex"; these might be more appropriate for "nonprinting.hex".
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