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TrueType hinting is no longer patented. 

* include/freetype/config/ftoption.h, devel/ftoption.h
(TT_CONFIG_OPTION_BYTECODE_INTERPRETER): Define.
(TT_CONFIG_OPTION_UNPATENTED_HINTING): Undefine.

* docs/CHANGES, docs/INSTALL, include/freetype/freetype.h: Updated.
* docs/TRUETYPE, docs/PATENTS: Removed.
This commit is contained in:
Werner Lemberg 2010-07-04 07:37:56 +02:00
parent ce27fd56fa
commit 6bbbbc1523
9 changed files with 58 additions and 101 deletions
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11
ChangeLog
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@ -1,3 +1,14 @@
2010-07-04 Werner Lemberg <wl@gnu.org>
TrueType hinting is no longer patented.
* include/freetype/config/ftoption.h, devel/ftoption.h
(TT_CONFIG_OPTION_BYTECODE_INTERPRETER): Define.
(TT_CONFIG_OPTION_UNPATENTED_HINTING): Undefine.
* docs/CHANGES, docs/INSTALL, include/freetype/freetype.h: Updated.
* docs/TRUETYPE, docs/PATENTS: Removed.
2010-07-04 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Check error value by `FT_CMap_New'.

14
devel/ftoption.h
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@ -488,8 +488,7 @@ FT_BEGIN_HEADER
/*************************************************************************/
/* */
/* Define TT_CONFIG_OPTION_BYTECODE_INTERPRETER if you want to compile */
/* a bytecode interpreter in the TrueType driver. Note that there are */
/* important patent issues related to the use of the interpreter. */
/* a bytecode interpreter in the TrueType driver. */
/* */
/* By undefining this, you will only compile the code necessary to load */
/* TrueType glyphs without hinting. */
@ -504,10 +503,13 @@ FT_BEGIN_HEADER
/* */
/* If you define TT_CONFIG_OPTION_UNPATENTED_HINTING, a special version */
/* of the TrueType bytecode interpreter is used that doesn't implement */
/* any of the patented opcodes and algorithms. Note that the */
/* TT_CONFIG_OPTION_UNPATENTED_HINTING macro is *ignored* if you define */
/* TT_CONFIG_OPTION_BYTECODE_INTERPRETER; in other words, either define */
/* TT_CONFIG_OPTION_BYTECODE_INTERPRETER or */
/* any of the patented opcodes and algorithms. The patents related to */
/* TrueType hinting have expired worldwide since May 2010; this option */
/* is now deprecated. */
/* */
/* Note that the TT_CONFIG_OPTION_UNPATENTED_HINTING macro is *ignored* */
/* if you define TT_CONFIG_OPTION_BYTECODE_INTERPRETER; in other words, */
/* either define TT_CONFIG_OPTION_BYTECODE_INTERPRETER or */
/* TT_CONFIG_OPTION_UNPATENTED_HINTING but not both at the same time. */
/* */
/* This macro is only useful for a small number of font files (mostly */

13
docs/CHANGES
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@ -1,10 +1,20 @@
CHANGES BETWEEN 2.3.12 and 2.3.13
CHANGES BETWEEN 2.3.12 and 2.4.0
I. IMPORTANT CHANGES
- Since May 2010, all patents regarding the TrueType bytecode
interpreter have expired worldwide. Consequently, we now define
TT_CONFIG_OPTION_BYTECODE_INTERPRETER by default (and undefine
TT_CONFIG_OPTION_UNPATENTED_HINTING).
- A new function `FT_Library_SetLcdFilterWeights' is available to
adjust the filter weights set by `FT_Library_SetLcdFilter'.
II. MISCELLANEOUS
- Thanks to many reports from Robert Święcki, FreeType's stability
in handling broken or damaged fonts could be much improved.
======================================================================
@ -16,6 +26,7 @@ CHANGES BETWEEN 2.3.11 and 2.3.12
preferred family names: FT_PARAM_TAG_IGNORE_PREFERRED_FAMILY and
FT_PARAM_TAG_IGNORE_PREFERRED_SUBFAMILY.
II. MISCELLANEOUS
- Support for incremental font loading (controlled with the

26
docs/INSTALL
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@ -7,13 +7,7 @@ overview of the documentation available:
I. Normal installation and upgrades
===================================
1. Native TrueType Hinting
Native TrueType hinting is disabled by default[1]. If you really
need it, read the file `TRUETYPE' for information.
2. Unix Systems (including Mac OS X, Cygwin, and MSys on Windows)
1. Unix Systems (including Mac OS X, Cygwin, and MSys on Windows)
Please read *both* `UPGRADE.UNIX' and `INSTALL.UNIX' to install or
upgrade FreeType 2 on a Unix system. Note that you *need* GNU
@ -23,22 +17,22 @@ I. Normal installation and upgrades
GNU Make VERSION 3.80 OR NEWER IS NEEDED!
3. On VMS with the `mms' build tool
2. On VMS with the `mms' build tool
See `INSTALL.VMS' for installation instructions on this platform.
4. Other systems using GNU Make
3. Other systems using GNU Make
On non-Unix platforms, it is possible to build the library using
GNU Make utility. Note that *NO OTHER MAKE TOOL WILL WORK*[2]!
GNU Make utility. Note that *NO OTHER MAKE TOOL WILL WORK*[1]!
This methods supports several compilers on Windows, OS/2, and
BeOS, including MinGW, Visual C++, Borland C++, and more.
Instructions are provided in the file `INSTALL.GNU'.
5. With an IDE Project File (e.g., for Visual Studio or CodeWarrior)
4. With an IDE Project File (e.g., for Visual Studio or CodeWarrior)
We provide a small number of `project files' for various IDEs to
automatically build the library as well. Note that these files
@ -49,7 +43,7 @@ I. Normal installation and upgrades
directory, where <system> stands for your OS or environment.
6. From you own IDE, or own Makefiles
5. From you own IDE, or own Makefiles
If you want to create your own project file, follow the
instructions given in the `INSTALL.ANY' document of this
@ -66,9 +60,7 @@ II. Custom builds of the library
----------------------------------------------------------------------
[1] More details on: http://www.freetype.org/patents.html
[2] make++, a make tool written in Perl, has sufficient support of GNU
[1] make++, a make tool written in Perl, has sufficient support of GNU
make extensions to build FreeType. See
http://makepp.sourceforge.net
@ -78,8 +70,8 @@ II. Custom builds of the library
----------------------------------------------------------------------
Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by
David Turner, Robert Wilhelm, and Werner Lemberg.
Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2010
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

27
docs/PATENTS
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@ -1,27 +0,0 @@
FreeType Patents Disclaimer
August 1999
WE HAVE DISCOVERED THAT APPLE OWNS SEVERAL PATENTS RELATED TO THE
RENDERING OF TRUETYPE FONTS. THIS COULD MEAN THAT THE FREE USE OF
FREETYPE MIGHT BE ILLEGAL IN THE USA, JAPAN, AND POSSIBLY OTHER
COUNTRIES, BE IT IN PROPRIETARY OR FREE SOFTWARE PRODUCTS.
FOR MORE DETAILS, WE STRONGLY ADVISE YOU TO GO TO THE FREETYPE
PATENTS PAGE AT THE FOLLOWING WEB ADDRESS:
http://www.freetype.org/patents.html
WE WILL NOT PLACE INFORMATION IN THIS FILE AS THE SITUATION IS STILL
UNDETERMINED FOR NOW. AT THE TIME THESE LINES ARE WRITTEN, WE HAVE
CONTACTED APPLE'S LEGAL DEPARTMENT AND ARE STILL WAITING FOR THEIR
ANSWER ON THE SUBJECT.
PLEASE READ THE `INSTALL' FILE TO SEE HOW TO DISABLE THE ENGINE'S
BYTECODE INTERPRETER IN ORDER TO BUILD A PATENT-FREE ENGINE, AT THE
COST OF RENDERING QUALITY.
--- end of PATENTS ---

40
docs/TRUETYPE
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@ -1,40 +0,0 @@
How to enable the TrueType native hinter if you need it
-------------------------------------------------------
The TrueType bytecode interpreter is disabled in all public releases
of the FreeType packages for patents reasons; see
http://www.freetype.org/patents.html
for more details.
However, many Linux distributions do enable the interpreter in the
FreeType packages (DEB/RPM/etc.) they produce for their platforms. If
you are using TrueType fonts on your system, you most probably want to
enable it manually by doing the following:
- open the file `include/freetype/config/ftoption.h'
- locate a line that says:
/* #define TT_CONFIG_OPTION_BYTECODE_INTERPRETER */
- change it to:
#define TT_CONFIG_OPTION_BYTECODE_INTERPRETER
These steps must be done _before_ compiling the library.
------------------------------------------------------------------------
Copyright 2003, 2005, 2006 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 TRUETYPE ---

18
include/freetype/config/ftoption.h
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@ -488,8 +488,7 @@ FT_BEGIN_HEADER
/*************************************************************************/
/* */
/* Define TT_CONFIG_OPTION_BYTECODE_INTERPRETER if you want to compile */
/* a bytecode interpreter in the TrueType driver. Note that there are */
/* important patent issues related to the use of the interpreter. */
/* a bytecode interpreter in the TrueType driver. */
/* */
/* By undefining this, you will only compile the code necessary to load */
/* TrueType glyphs without hinting. */
@ -497,17 +496,20 @@ FT_BEGIN_HEADER
/* Do not #undef this macro here, since the build system might */
/* define it for certain configurations only. */
/* */
/* #define TT_CONFIG_OPTION_BYTECODE_INTERPRETER */
#define TT_CONFIG_OPTION_BYTECODE_INTERPRETER
/*************************************************************************/
/* */
/* If you define TT_CONFIG_OPTION_UNPATENTED_HINTING, a special version */
/* of the TrueType bytecode interpreter is used that doesn't implement */
/* any of the patented opcodes and algorithms. Note that the */
/* TT_CONFIG_OPTION_UNPATENTED_HINTING macro is *ignored* if you define */
/* TT_CONFIG_OPTION_BYTECODE_INTERPRETER; in other words, either define */
/* TT_CONFIG_OPTION_BYTECODE_INTERPRETER or */
/* any of the patented opcodes and algorithms. The patents related to */
/* TrueType hinting have expired worldwide since May 2010; this option */
/* is now deprecated. */
/* */
/* Note that the TT_CONFIG_OPTION_UNPATENTED_HINTING macro is *ignored* */
/* if you define TT_CONFIG_OPTION_BYTECODE_INTERPRETER; in other words, */
/* either define TT_CONFIG_OPTION_BYTECODE_INTERPRETER or */
/* TT_CONFIG_OPTION_UNPATENTED_HINTING but not both at the same time. */
/* */
/* This macro is only useful for a small number of font files (mostly */
@ -544,7 +546,7 @@ FT_BEGIN_HEADER
/* ... */
/* } */
/* */
#define TT_CONFIG_OPTION_UNPATENTED_HINTING
/* #define TT_CONFIG_OPTION_UNPATENTED_HINTING */
/*************************************************************************/

6
include/freetype/freetype.h
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@ -3834,6 +3834,9 @@ FT_BEGIN_HEADER
/* 1~if this is a TrueType font that uses one of the patented */
/* opcodes, 0~otherwise. */
/* */
/* <Note> */
/* Since May 2010, TrueType hinting is no longer patented. */
/* */
/* <Since> */
/* 2.3.5 */
/* */
@ -3861,6 +3864,9 @@ FT_BEGIN_HEADER
/* an SFNT font, or if the unpatented hinter is not compiled in this */
/* instance of the library. */
/* */
/* <Note> */
/* Since May 2010, TrueType hinting is no longer patented. */
/* */
/* <Since> */
/* 2.3.5 */
/* */

4
include/freetype/ftmodapi.h
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@ -397,8 +397,8 @@ FT_BEGIN_HEADER
*
* FT_TRUETYPE_ENGINE_TYPE_PATENTED ::
* The library implements a bytecode interpreter that covers
* the full instruction set of the TrueType virtual machine.
* See the file `docs/PATENTS' for legal aspects.
* the full instruction set of the TrueType virtual machine (this
* was governed by patents until May 2010, hence the name).
*
* @since:
* 2.2