1This file contains a list of various font formats. It gives the 2reference document and whether it is supported in FreeType 2. 3 4Table fields 5------------ 6 7 wrapper format 8 The format used to represent the font data. In the table below it 9 is used only if the font format differs. Possible values are 10 11 SFNT binary 12 PFB binary 13 PS a text header, followed by binary or text data 14 LZW compressed with either `gzip' or `compress' 15 BZ2 compressed with `bzip2'. 16 17 font format 18 How the font is to be accessed, possibly after converting the file 19 type and wrapper format into a generic form. Bitmap formats are 20 `BDF', `PCF', and one form of `WINFNT'; all others are vector 21 formats. `PS' indicates third-order, `TT' second-order Bézier 22 curves. 23 24 font type 25 Sub-formats of the font format. `SBIT' and `MACSBIT' are bitmap 26 formats, `MM' and `VAR' support optical axes. `CFF2' supports 27 optical axes also. 28 29 glyph access 30 If not specified, the glyph access is `standard' to the font 31 format. Values are `CID' for CID-keyed fonts, `SYNTHETIC' for 32 fonts that are modified versions of other fonts by means of a 33 transformation matrix, and `TYPE_0' for PS fonts which are to be 34 accessed in a tree-like structure. 35 36 FreeType driver 37 The module in the FreeType library which handles the specific font 38 format. A missing entry means that FreeType doesn't support the 39 font format (yet). 40 41 42Notes 43----- 44 45 The SFNT container format also provides `collections' (usually 46 having the file extension `.ttc' or `.otc'). A collection contains 47 multiple font faces that share some tables to avoid redundancy, thus 48 reducing the file size. In FreeType, elements of a collection can 49 be accessed with a proper face index. 50 51 Both the GX and the OpenType 1.8 variation fonts provide `named 52 instances'. FreeType maps them to face indices (they can also be 53 accessed with the standard MM interface). 54 55 Other font formats (not using the SFNT wrapper) also provide 56 multiple faces within one file; they are marked with an asterisk 57 (`*') in the table below. 58 59 FreeType can be configured to support Mac files (on older Mac OS 60 versions, a `file' is stored as a data and a resource fork, this is, 61 within two separate data chunks). If a file can't be opened as a 62 font, FreeType then checks whether it is a resource fork, trying to 63 extract the contained font data from either a `POST' or `sfnt' 64 resource. 65 66 67Please send additions and/or corrections to wl@gnu.org or to the 68FreeType developer's list at freetype-devel@nongnu.org (for 69subscribers only). If you can provide a font example for a format 70which isn't supported yet please send a mail too. 71 72 73 wrapper font font glyph FreeType reference 74 format format type access driver documents 75 ----------------------------------------------------------------------------- 76 77 --- BDF --- --- bdf 5005.BDF_Spec.pdf, X11 78 79 80 SFNT PS TYPE_1 --- type1 Type 1 GX Font Format 81 (for the Mac) [3] 82 SFNT PS TYPE_1 CID cid 5180.sfnt.pdf (for the Mac) [3] 83 SFNT PS CFF --- cff OT spec, 5176.CFF.pdf 84 (`OTTO' format) 85 SFNT PS CFF CID cff OT spec, 5176.CFF.pdf 86 SFNT PS CFF SYNTHETIC --- OT spec, 5176.CFF.pdf 87 SFNT PS CFF2 --- cff OT spec 1.8 88 89 SFNT TT SBIT --- sfnt XFree86 (bitmaps only; 90 with `head' table) 91 SFNT TT MACSBIT --- sfnt OT spec (for the Mac; 92 bitmaps only; `bhed' table) 93 SFNT TT --- --- truetype OT spec (`normal' TT font) 94 SFNT TT VAR --- truetype GX spec (`?var' tables) 95 SFNT TT VAR --- truetype OT spec 1.8 96 (`?var' + `?VAR' tables) 97 98 99 WOFF --- --- --- cff, Compressed SFNT, ver. 1.0 [6] 100 truetype 101 WOFF2 --- --- --- cff, Compressed SFNT, ver. 2.0 [6] 102 truetype 103 104 105 --- PS TYPE_1 --- type1 T1_SPEC.pdf 106 (PFA, Type 1 font resource) 107 PFB PS TYPE_1 --- type1 T1_SPEC.pdf, 108 5040.Download_Fonts.pdf 109 (`normal' Type 1 font) 110 --- PS TYPE_1 CID cid PLRM.pdf (CID Font Type 0; 111 Type 9 font) 112 --- PS MM --- type1 5015.Type1_Supp.pdf 113 (Multiple Masters) 114 --- PS CFF --- cff 5176.CFF.pdf (`pure' CFF) 115 --- PS* CFF CID cff 5176.CFF.pdf (`pure' CFF) 116 --- PS CFF SYNTHETIC --- 5176.CFF.pdf (`pure' CFF) 117 --- PS CFF/MM --- cff old 5167.CFF.pdf (`pure' CFF) 118 [3] 119 --- PS* CFF/MM CID cff old 5167.CFF.pdf (`pure' CFF) 120 [3] 121 --- PS CFF/MM SYNTHETIC --- old 5167.CFF.pdf (`pure' CFF) 122 [3] 123 PS PS CFF --- --- PLRM.pdf (Type 2) [1] 124 PS PS* CFF CID --- PLRM.pdf (Type 2) [1] 125 PS PS CFF SYNTHETIC --- PLRM.pdf (Type 2) [1] 126 PS PS CFF/MM --- --- PLRM.pdf (Type 2) [1] 127 PS PS* CFF/MM CID --- PLRM.pdf (Type 2) [1] 128 PS PS CFF/MM SYNTHETIC --- PLRM.pdf (Type 2) [1] 129 --- PS --- TYPE_0 --- PLRM.pdf 130 --- PS TYPE_3 --- --- PLRM.pdf (never supported) 131 --- PS TYPE_3 CID --- PLRM.pdf (CID Font Type 1; 132 Type 10 font; never supported) 133 PS PS TYPE_14 --- --- PLRM.pdf (Chameleon font; 134 Type 14 font; never supported?) 135 --- PS TYPE_32 CID --- PLRM.pdf (CID Font Type 4; 136 Type 32 font; never supported?) 137 PS TT --- --- type42 5012.Type42_Spec.pdf 138 (Type 42 font) 139 PS TT --- CID --- PLRM.pdf (CID Font Type 2; 140 Type 11 font) 141 142 143 ? ? CEF ? cff ? 144 145 146 --- PCF --- --- pcf X11 [4] 147 LZW PCF --- --- pcf X11 [4] 148 BZ2 PCF --- --- pcf X11 [4] 149 150 151 --- PFR* PFR0 --- pfr [2] 152 --- PFR PFR1 --- --- (undocumented, proprietary; 153 probably never supported) 154 155 156 --- WINFNT* --- --- winfonts Windows developer's notes [5] 157 --- WINFNT VECTOR --- --- Windows developer's notes [5] 158 159 160[1] Support should be rather simple since this is identical to `CFF' 161 but in a PS wrapper. 162 163[2] The official PFR specification is no longer available, but 164 archive.org has archived it: 165 166 https://web.archive.org/web/20091014062300/http://www.bitstream.com/font_rendering/products/truedoc/pfrspec.html 167 https://web.archive.org/web/20081115152605/http://www.bitstream.com/font_rendering/pdfs/pfrspec1.3.pdf 168 169 The syntax of the auxiliary data is not defined there, but is 170 partially defined in MHP 1.0.3 (also called ETSI TS 101812 V1.3.1) 171 section 7.4. 172 173 https://www.etsi.org/ 174 https://webapp.etsi.org/workprogram/Report_WorkItem.asp?WKI_ID=18799 175 176[3] Support is rudimentary currently; some tables or data are not 177 loaded yet. 178 179[4] See 180 181 THE X WINDOW SYSTEM SERVER: X VERSION 11, RELEASE 5 182 Elias Israel, Erik Fortune, Digital Press, 1992 183 ISBN 1-55558-096-3 184 185 for a specification given in Appendix D on pgs. 436-450. However, 186 this information might be out of date; unfortunately, there is no 187 PCF specification available online, and this book is out of print. 188 George Williams deduced the font format from the X11 sources and 189 documented it for his FontForge font editor: 190 191 https://fontforge.github.io/pcf-format.html 192 193[5] This is from MS Windows 3; see Microsoft's Knowledge Base article 194 at 195 196 https://support.microsoft.com/kb/65123 197 198[6] Supported font formats are TrueType and OpenType fonts as 199 defined in the OpenType specification 1.6 and newer. 200 201------------------------------------------------------------------------ 202 203Copyright (C) 2004-2022 by 204David Turner, Robert Wilhelm, and Werner Lemberg. 205 206This file is part of the FreeType project, and may only be used, 207modified, and distributed under the terms of the FreeType project 208license, LICENSE.TXT. By continuing to use, modify, or distribute this 209file you indicate that you have read the license and understand and 210accept it fully. 211 212 213--- end of formats.txt --- 214 215Local Variables: 216coding: utf-8 217End: 218