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* include/freetype/config/ftoption.h: clarify documentation regarding

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unpatented hinting

	* include/freetype/freetype.h, src/base/ftpatent.c, src/truetype/ttdriver.c,
	include/freetype/internal/services/svttglyf.h, modules.cfg,:
	include/freetype/internal/ftserv.h,:
	Fonts without a cmap must be handled correctly by FreeType (anything
	Adding the FT_Face_CheckTrueTypePatents API to FT_FREETYPE_H, it is
	implemented by the optional src/base/ftpatent.c
david-pic-changes
David Turner 18 years ago
parent 33db39e292
commit 84c6f88117
8 changed files with 122 additions and 9 deletions
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  1. 16
      ChangeLog
  2. 26
      include/freetype/config/ftoption.h
  3. 25
      include/freetype/freetype.h
  4. 1
      include/freetype/internal/ftserv.h
  5. 48
      include/freetype/internal/services/svttglyf.h
  6. 5
      modules.cfg
  7. 2
      src/base/Jamfile
  8. 8
      src/truetype/ttdriver.c

16
ChangeLog
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@ -1,6 +1,18 @@
2007-06-10 David Turner <david@freetype.org>
* include/freetype/config/ftoption.h: clarify documentation regarding
unpatented hinting
* include/freetype/freetype.h, src/base/ftpatent.c, src/truetype/ttdriver.c,
include/freetype/internal/services/svttglyf.h, modules.cfg,:
include/freetype/internal/ftserv.h,:
Fonts without a cmap must be handled correctly by FreeType (anything
Adding the FT_Face_CheckTrueTypePatents API to FT_FREETYPE_H, it is
implemented by the optional src/base/ftpatent.c
2007-06-08 Werner Lemberg <wl@gnu.org>
* src/sfnt/sfobjs.c (sfnt_load_face): Undo change from 2007-04-28.
* src/sfnt/sfobjs.c (sfnt_load_face): Undo change from 2007-04-28.
Fonts without a cmap must be handled correctly by FreeType (anything
else would be a bug).
@ -399,7 +411,7 @@
computation.
* src/autofit/afloader.c (af_loader_load_g): In the case of
monospaced fonts, always set `rsb_delta' and `lsb_delta' to 0.
monospaced fonts, always set `rsb_delta' and `lsb_delta' to 0.
Otherwise code that uses them will most certainly ruin the fixed
advance property.

26
include/freetype/config/ftoption.h
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@ -463,12 +463,26 @@ FT_BEGIN_HEADER
/*************************************************************************/
/* */
/* Define TT_CONFIG_OPTION_UNPATENTED_HINTING (in addition to */
/* TT_CONFIG_OPTION_BYTECODE_INTERPRETER) to compile the unpatented */
/* work-around hinting system. Note that for the moment, the algorithm */
/* is only used when selected at runtime through the parameter tag */
/* FT_PARAM_TAG_UNPATENTED_HINTING; or when the debug hook */
/* FT_DEBUG_HOOK_UNPATENTED_HINTING is globally activated. */
/* The TT_CONFIG_OPTION_UNPATENTED_HINTING macro is *ignored* if you */
/* have defined TT_CONFIG_OPTION_BYTECODE_INTERPRETER. If not, it will */
/* compile a special work-around TrueType bytecode interpreter that */
/* doesn't implement any of the patented opcodes/algorithms. */
/* */
/* this is only useful for a small number of font files (mostly Asian) */
/* that require bytecode interpretation to properly load glyphs. For all */
/* other fonts, this will produce unpleasant results. */
/* */
/* for this reason, the unpatented interpreter is never used by to load */
/* glyphs from TrueType fonts, unless one of the following happens: */
/* */
/* - the unpatented interpreter is explicitely activated by the */
/* user through the FT_PARAM_TAG_UNPATENTED_HINTING parameter tag */
/* when opening the FT_Face */
/* */
/* - FreeType detects that the FT_Face corresponds to one of the */
/* 'trick' fonts (e.g. Mingliu) it knows about. The font engine */
/* contains a hard-coded list of font names and other matching */
/* parameters. */
/* */
#define TT_CONFIG_OPTION_UNPATENTED_HINTING

25
include/freetype/freetype.h
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@ -3368,6 +3368,31 @@ FT_BEGIN_HEADER
FT_Int *aminor,
FT_Int *apatch );
/*************************************************************************/
/* */
/* <Function> */
/* FT_Face_CheckTrueTypePatents */
/* */
/* <Description> */
/* Parses the whole content of a TrueType font file and returns */
/* true if it uses any of the patented opcodes. this is only useful */
/* if you want to be able to use the unpatented hinter with */
/* fonts that do *not* use these opcodes. */
/* */
/* note that this function parses *all* glyph instructions in the */
/* font file, and may be *slow* */
/* */
/* <Input> */
/* face :: a face handle */
/* */
/* <Return> */
/* TRUE if this is a TrueType font that uses one of the patented */
/* opcodes. FALSE otherwise */
/* */
FT_EXPORT( FT_Bool )
FT_Face_CheckTrueTypePatents( FT_Face face );
/* */

1
include/freetype/internal/ftserv.h
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@ -315,6 +315,7 @@ FT_BEGIN_HEADER
#define FT_SERVICE_TT_CMAP_H <freetype/internal/services/svttcmap.h>
#define FT_SERVICE_WINFNT_H <freetype/internal/services/svwinfnt.h>
#define FT_SERVICE_XFREE86_NAME_H <freetype/internal/services/svxf86nm.h>
#define FT_SERVICE_TRUETYPE_GLYF_H <freetype/internal/services/svttglyf.h>
/* */

48
include/freetype/internal/services/svttglyf.h
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@ -0,0 +1,48 @@
/***************************************************************************/
/* */
/* svsttglyf.h */
/* */
/* The FreeType TrueType glyph service. */
/* */
/* Copyright 2007 by David Turner. */
/* */
/* 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. */
/* */
/***************************************************************************/
#ifndef __SVTTGLYF_H__
#define __SVTTGLYF_H__
#include FT_INTERNAL_SERVICE_H
#include FT_TRUETYPE_TABLES_H
FT_BEGIN_HEADER
#define FT_SERVICE_ID_TT_GLYF "tt-glyf"
typedef FT_ULong
(*TT_Glyf_GetLocationFunc)( FT_Face face,
FT_UInt gindex,
FT_ULong *psize );
FT_DEFINE_SERVICE( TTGlyf )
{
TT_Glyf_GetLocationFunc get_location;
};
/* */
FT_END_HEADER
#endif /* __SVTTCMAP_H__ */
/* END */

5
modules.cfg
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@ -220,6 +220,11 @@ BASE_EXTENSIONS += ftlcdfil.c
# See include/freetype/ftgasp.h for the API.
BASE_EXTENSIONS += ftgasp.c
# Support for FT_Face_CheckTrueTypePatents
#
# See include/freetype.h for the API.
BASE_EXTENSIONS += ftpatent.c
####
#### The components `ftsystem.c' (for memory allocation and stream I/O
#### management) and `ftdebug.c' (for emitting debug messages to the user)

2
src/base/Jamfile
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@ -34,7 +34,7 @@ SubDir FT2_TOP $(FT2_SRC_DIR) base ;
local _sources = system init glyph mm bdf
bbox debug xf86 type1 pfr
stroke winfnt otval bitmap synth
gxval lcdfil gasp
gxval lcdfil gasp patent
;
Library $(FT2_LIB) : ft$(_sources).c ;

8
src/truetype/ttdriver.c
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@ -29,9 +29,11 @@
#endif
#include FT_SERVICE_TRUETYPE_ENGINE_H
#include FT_SERVICE_TRUETYPE_GLYF_H
#include "ttdriver.h"
#include "ttgload.h"
#include "ttpload.h"
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
#include "ttgxvar.h"
@ -313,6 +315,11 @@
#endif /* TT_USE_BYTECODE_INTERPRETER */
};
static const FT_Service_TTGlyfRec tt_service_truetype_glyf =
{
(TT_Glyf_GetLocationFunc) tt_face_get_location
};
static const FT_ServiceDescRec tt_services[] =
{
{ FT_SERVICE_ID_XF86_NAME, FT_XF86_FORMAT_TRUETYPE },
@ -320,6 +327,7 @@
{ FT_SERVICE_ID_MULTI_MASTERS, &tt_service_gx_multi_masters },
#endif
{ FT_SERVICE_ID_TRUETYPE_ENGINE, &tt_service_truetype_engine },
{ FT_SERVICE_ID_TT_GLYF, &tt_service_truetype_glyf },
{ NULL, NULL }
};

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