209 lines
9.0 KiB
Plaintext
209 lines
9.0 KiB
Plaintext
This file contains a list of various font formats. It gives the
|
|
reference document and whether it is supported in FreeType 2.
|
|
|
|
Table fields
|
|
------------
|
|
|
|
wrapper format
|
|
The format used to represent the font data. In the table below it
|
|
is used only if the font format differs. Possible values are
|
|
|
|
SFNT binary
|
|
PFB binary
|
|
PS a text header, followed by binary or text data
|
|
LZW compressed with either `gzip' or `compress'
|
|
BZ2 compressed with `bzip2'.
|
|
|
|
font format
|
|
How the font is to be accessed, possibly after converting the file
|
|
type and wrapper format into a generic form. Bitmap formats are
|
|
`BDF', `PCF', and one form of `WINFNT'; all others are vector
|
|
formats. `PS' indicates third-order, `TT' second-order Bézier
|
|
curves.
|
|
|
|
font type
|
|
Sub-formats of the font format. `SBIT' and `MACSBIT' are bitmap
|
|
formats, `MM' and `VAR' support optical axes. `CFF2' supports
|
|
optical axes also.
|
|
|
|
glyph access
|
|
If not specified, the glyph access is `standard' to the font
|
|
format. Values are `CID' for CID-keyed fonts, `SYNTHETIC' for
|
|
fonts that are modified versions of other fonts by means of a
|
|
transformation matrix, and `TYPE_0' for PS fonts which are to be
|
|
accessed in a tree-like structure.
|
|
|
|
FreeType driver
|
|
The module in the FreeType library which handles the specific font
|
|
format. A missing entry means that FreeType doesn't support the
|
|
font format (yet).
|
|
|
|
|
|
Notes
|
|
-----
|
|
|
|
The SFNT container format also provides `collections' (usually
|
|
having the file extension `.ttc' or `.otc'). A collection contains
|
|
multiple font faces that share some tables to avoid redundancy, thus
|
|
reducing the file size. In FreeType, elements of a collection can
|
|
be accessed with a proper face index.
|
|
|
|
Both the GX and the OpenType 1.8 variation fonts provide `named
|
|
instances'. FreeType maps them to face indices (they can also be
|
|
accessed with the standard MM interface).
|
|
|
|
Other font formats (not using the SFNT wrapper) also provide
|
|
multiple faces within one file; they are marked with an asterisk
|
|
(`*') in the table below.
|
|
|
|
FreeType can be configured to support Mac files (on older Mac OS
|
|
versions, a `file' is stored as a data and a resource fork, this is,
|
|
within two separate data chunks). If a file can't be opened as a
|
|
font, FreeType then checks whether it is a resource fork, trying to
|
|
extract the contained font data from either a `POST' or `sfnt'
|
|
resource.
|
|
|
|
|
|
Please send additions and/or corrections to wl@gnu.org or to the
|
|
FreeType developer's list at freetype-devel@nongnu.org (for
|
|
subscribers only). If you can provide a font example for a format
|
|
which isn't supported yet please send a mail too.
|
|
|
|
|
|
wrapper font font glyph FreeType reference
|
|
format format type access driver documents
|
|
-----------------------------------------------------------------------------
|
|
|
|
--- BDF --- --- bdf 5005.BDF_Spec.pdf, X11
|
|
|
|
|
|
SFNT PS TYPE_1 --- type1 Type 1 GX Font Format
|
|
(for the Mac) [3]
|
|
SFNT PS TYPE_1 CID cid 5180.sfnt.pdf (for the Mac)
|
|
[3]
|
|
SFNT PS CFF --- cff OT spec, 5176.CFF.pdf
|
|
(`OTTO' format)
|
|
SFNT PS CFF CID cff OT spec, 5176.CFF.pdf
|
|
SFNT PS CFF SYNTHETIC --- OT spec, 5176.CFF.pdf
|
|
SFNT PS CFF2 --- cff OT spec 1.8
|
|
|
|
SFNT TT SBIT --- sfnt XFree86 (bitmaps only;
|
|
with `head' table)
|
|
SFNT TT MACSBIT --- sfnt OT spec (for the Mac;
|
|
bitmaps only; `bhed' table)
|
|
SFNT TT --- --- truetype OT spec (`normal' TT font)
|
|
SFNT TT VAR --- truetype GX spec (`?var' tables)
|
|
SFNT TT VAR --- truetype OT spec 1.8
|
|
(`?var' + `?VAR' tables)
|
|
|
|
|
|
--- PS TYPE_1 --- type1 T1_SPEC.pdf
|
|
(PFA, Type 1 font resource)
|
|
PFB PS TYPE_1 --- type1 T1_SPEC.pdf,
|
|
5040.Download_Fonts.pdf
|
|
(`normal' Type 1 font)
|
|
--- PS TYPE_1 CID cid PLRM.pdf (CID Font Type 0;
|
|
Type 9 font)
|
|
--- PS MM --- type1 5015.Type1_Supp.pdf
|
|
(Multiple Masters)
|
|
--- PS CFF --- cff 5176.CFF.pdf (`pure' CFF)
|
|
--- PS* CFF CID cff 5176.CFF.pdf (`pure' CFF)
|
|
--- PS CFF SYNTHETIC --- 5176.CFF.pdf (`pure' CFF)
|
|
--- PS CFF/MM --- cff old 5167.CFF.pdf (`pure' CFF)
|
|
[3]
|
|
--- PS* CFF/MM CID cff old 5167.CFF.pdf (`pure' CFF)
|
|
[3]
|
|
--- PS CFF/MM SYNTHETIC --- old 5167.CFF.pdf (`pure' CFF)
|
|
[3]
|
|
PS PS CFF --- --- PLRM.pdf (Type 2) [1]
|
|
PS PS* CFF CID --- PLRM.pdf (Type 2) [1]
|
|
PS PS CFF SYNTHETIC --- PLRM.pdf (Type 2) [1]
|
|
PS PS CFF/MM --- --- PLRM.pdf (Type 2) [1]
|
|
PS PS* CFF/MM CID --- PLRM.pdf (Type 2) [1]
|
|
PS PS CFF/MM SYNTHETIC --- PLRM.pdf (Type 2) [1]
|
|
--- PS --- TYPE_0 --- PLRM.pdf
|
|
--- PS TYPE_3 --- --- PLRM.pdf (never supported)
|
|
--- PS TYPE_3 CID --- PLRM.pdf (CID Font Type 1;
|
|
Type 10 font; never supported)
|
|
PS PS TYPE_14 --- --- PLRM.pdf (Chameleon font;
|
|
Type 14 font; never supported?)
|
|
--- PS TYPE_32 CID --- PLRM.pdf (CID Font Type 4;
|
|
Type 32 font; never supported?)
|
|
PS TT --- --- type42 5012.Type42_Spec.pdf
|
|
(Type 42 font)
|
|
PS TT --- CID --- PLRM.pdf (CID Font Type 2;
|
|
Type 11 font)
|
|
|
|
|
|
? ? CEF ? cff ?
|
|
|
|
|
|
--- PCF --- --- pcf X11 [4]
|
|
LZW PCF --- --- pcf X11 [4]
|
|
BZ2 PCF --- --- pcf X11 [4]
|
|
|
|
|
|
--- PFR* PFR0 --- pfr [2]
|
|
--- PFR PFR1 --- --- (undocumented, proprietary;
|
|
probably never supported)
|
|
|
|
|
|
--- WINFNT* --- --- winfonts Windows developer's notes [5]
|
|
--- WINFNT VECTOR --- --- Windows developer's notes [5]
|
|
|
|
|
|
[1] Support should be rather simple since this is identical to `CFF'
|
|
but in a PS wrapper.
|
|
|
|
[2] The official PFR specification is no longer available, but
|
|
archive.org has archived it:
|
|
|
|
https://web.archive.org/web/20091014062300/http://www.bitstream.com/font_rendering/products/truedoc/pfrspec.html
|
|
https://web.archive.org/web/20081115152605/http://www.bitstream.com/font_rendering/pdfs/pfrspec1.3.pdf
|
|
|
|
The syntax of the auxiliary data is not defined there, but is
|
|
partially defined in MHP 1.0.3 (also called ETSI TS 101812 V1.3.1)
|
|
section 7.4.
|
|
|
|
https://www.etsi.org/
|
|
https://webapp.etsi.org/workprogram/Report_WorkItem.asp?WKI_ID=18799
|
|
|
|
[3] Support is rudimentary currently; some tables or data are not
|
|
loaded yet.
|
|
|
|
[4] See
|
|
|
|
THE X WINDOW SYSTEM SERVER: X VERSION 11, RELEASE 5
|
|
Elias Israel, Erik Fortune, Digital Press, 1992
|
|
ISBN 1-55558-096-3
|
|
|
|
for a specification given in Appendix D on pgs. 436-450. However,
|
|
this information might be out of date; unfortunately, there is no
|
|
PCF specification available online, and this book is out of print.
|
|
George Williams deduced the font format from the X11 sources and
|
|
documented it for his FontForge font editor:
|
|
|
|
https://fontforge.github.io/pcf-format.html
|
|
|
|
[5] This is from MS Windows 3; see Microsoft's Knowledge Base article at
|
|
|
|
https://support.microsoft.com/kb/65123
|
|
|
|
------------------------------------------------------------------------
|
|
|
|
Copyright (C) 2004-2019 by
|
|
David Turner, Robert Wilhelm, and Werner Lemberg.
|
|
|
|
This file is part of the FreeType project, and may only be used,
|
|
modified, and distributed under the terms of the FreeType project
|
|
license, LICENSE.TXT. By continuing to use, modify, or distribute this
|
|
file you indicate that you have read the license and understand and
|
|
accept it fully.
|
|
|
|
|
|
--- end of formats.txt ---
|
|
|
|
Local Variables:
|
|
coding: utf-8
|
|
End:
|