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-rw-r--r--freetype/docs/formats.txt20
1 files changed, 14 insertions, 6 deletions
diff --git a/freetype/docs/formats.txt b/freetype/docs/formats.txt
index 571f5ff50..efec66060 100644
--- a/freetype/docs/formats.txt
+++ b/freetype/docs/formats.txt
@@ -111,8 +111,8 @@ MAC --- PS TYPE_1 --- type1 T1_SPEC.pdf
--- ? ? CEF ? cff ?
---- --- PCF --- --- pcf X11, [4]
---- LZW PCF --- --- pcf X11, [4]
+--- --- PCF --- --- pcf X11 [4]
+--- LZW PCF --- --- pcf X11 [4]
--- --- PFR PFR0 --- pfr [2]
@@ -143,15 +143,23 @@ MAC --- PS TYPE_1 --- type1 T1_SPEC.pdf
[3] Support is rudimentary currently; some tables are not loaded yet.
-[4] There is no formal PCF specification; you have to deduce the exact
- format from the source code within X11. George Williams did this for
- his FontForge editor:
+[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+ this information might be out of date; unfortunately, there is no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:
http://fontforge.sourceforge.net/pcf-format.html
------------------------------------------------------------------------
-Copyright 2004, 2005, 2008, 2009 by
+Copyright 2004, 2005, 2008, 2009, 2010 by
David Turner, Robert Wilhelm, and Werner Lemberg.
This file is part of the FreeType project, and may only be used,