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Fix support for subsetted CID-keyed CFFs. 

* include/freetype/freetype.h (FT_FACE_FLAG_CID_KEYED,
FT_IS_CID_KEYED): New macros.

* src/cff/cffobjs.c (cff_face_init): Set number of glyphs to the
maximum CID value in CID-keyed CFFs.
Handle FT_FACE_FLAG_CID_KEYED flag.

* docs/CHANGES: Document it.


Fix CFF font matrix calculation and improve precision.

* src/cff/cffparse.c (cff_parse_real): Increase precision if integer
part is zero.
(cff_parse_font_matrix): Simplify computation of `units_per_em';
this prevents overflow also.


Support FT_Get_CID_Registry_Ordering_Supplement for PS CID fonts.

* src/cid/cidriver.c: Include FT_SERVICE_CID_H.
(cid_get_ros): New function.
(cid_service_cid_info): New service structure.
(cid_services): Register it.
This commit is contained in:
Werner Lemberg 2008-04-01 05:55:48 +00:00
parent a56e526671
commit 210d61894b
7 changed files with 160 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
ChangeLog
View File

@ -1,3 +1,32 @@
2008-03-31 Werner Lemberg <wl@gnu.org>
Fix support for subsetted CID-keyed CFFs.
* include/freetype/freetype.h (FT_FACE_FLAG_CID_KEYED,
FT_IS_CID_KEYED): New macros.
* src/cff/cffobjs.c (cff_face_init): Set number of glyphs to the
maximum CID value in CID-keyed CFFs.
Handle FT_FACE_FLAG_CID_KEYED flag.
* docs/CHANGES: Document it.
Fix CFF font matrix calculation and improve precision.
* src/cff/cffparse.c (cff_parse_real): Increase precision if integer
part is zero.
(cff_parse_font_matrix): Simplify computation of `units_per_em';
this prevents overflow also.
Support FT_Get_CID_Registry_Ordering_Supplement for PS CID fonts.
* src/cid/cidriver.c: Include FT_SERVICE_CID_H.
(cid_get_ros): New function.
(cid_service_cid_info): New service structure.
(cid_services): Register it.
2008-03-23 Werner Lemberg <wl@gnu.org>
Adjustments for Visual C++ 8.0, as reported by Rainer Deyke.

6
docs/CHANGES
View File

@ -12,6 +12,8 @@ CHANGES BETWEEN 2.3.6 and 2.3.5
- Improved Mac support.
- Subsetted CID-keyed CFFs are now supported correctly.
II. IMPORTANT CHANGES
@ -26,6 +28,10 @@ CHANGES BETWEEN 2.3.6 and 2.3.5
- An API for cmap 14 support (for Unicode Variant Selectors, UVS)
has been contributed by George Williams.
- A new face flag FT_FACE_FLAG_CID_KEYED has been added, together
with a macro FT_IS_CID_KEYED which evaluates to 1 if the font is
CID-keyed.
III. MISCELLANEOUS

33
include/freetype/freetype.h
View File

@ -1021,6 +1021,15 @@ FT_BEGIN_HEADER
/* the SFNT `gasp' table only if the native TrueType hinting engine */
/* (with the bytecode interpreter) is available and active. */
/* */
/* FT_FACE_FLAG_CID_KEYED :: */
/* Set if the font is CID-keyed. In that case, the font is not */
/* accessed by glyph indices but by CID values. For subsetted */
/* CID-keyed fonts this has the consequence that not all index */
/* values are a valid argument to FT_Load_Glyph. Only the CID */
/* values for which corresponding glyphs in the subsetted font */
/* exist make FT_Load_Glyph return successfully; in all other cases */
/* you get an `FT_Err_Invalid_Argument' error. */
/* */
#define FT_FACE_FLAG_SCALABLE ( 1L << 0 )
#define FT_FACE_FLAG_FIXED_SIZES ( 1L << 1 )
#define FT_FACE_FLAG_FIXED_WIDTH ( 1L << 2 )
@ -1033,6 +1042,7 @@ FT_BEGIN_HEADER
#define FT_FACE_FLAG_GLYPH_NAMES ( 1L << 9 )
#define FT_FACE_FLAG_EXTERNAL_STREAM ( 1L << 10 )
#define FT_FACE_FLAG_HINTER ( 1L << 11 )
#define FT_FACE_FLAG_CID_KEYED ( 1L << 12 )
/* */
@ -1189,6 +1199,24 @@ FT_BEGIN_HEADER
( face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS )
/*************************************************************************
*
* @macro:
* FT_IS_CID_KEYED( face )
*
* @description:
* A macro that returns true whenever a face object contains a CID-keyed
* font. See the discussion of @FT_FACE_FLAG_CID_KEYED for more
* details.
*
* If this macro is true, all functions defined in @FT_CID_H are
* available.
*
*/
#define FT_IS_CID_KEYED( face ) \
( face->face_flags & FT_FACE_FLAG_CID_KEYED )
/*************************************************************************/
/* */
/* <Constant> */
@ -2194,6 +2222,11 @@ FT_BEGIN_HEADER
/* The loaded glyph may be transformed. See @FT_Set_Transform for */
/* the details. */
/* */
/* For subsetted CID-keyed fonts, `FT_Err_Invalid_Argument' is */
/* returned for invalid CID values (this is, for CID values which */
/* don't have a corresponding glyph in the font). See the discussion */
/* of the @FT_FACE_FLAG_CID_KEYED flag for more details. */
/* */
FT_EXPORT( FT_Error )
FT_Load_Glyph( FT_Face face,
FT_UInt glyph_index,

32
src/cff/cffdrivr.c
View File

@ -38,6 +38,7 @@
#include FT_SERVICE_XFREE86_NAME_H
#include FT_SERVICE_GLYPH_DICT_H
/*************************************************************************/
/* */
/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
@ -165,10 +166,10 @@
if ( !size )
load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING;
/* reset the size object if necessary */
if ( load_flags & FT_LOAD_NO_SCALE )
size = NULL;
/* reset the size object if necessary */
if ( size )
{
/* these two objects must have the same parent */
@ -186,10 +187,10 @@
}
/*
* GLYPH DICT SERVICE
*
*/
/*
* GLYPH DICT SERVICE
*
*/
static FT_Error
cff_get_glyph_name( CFF_Face face,
@ -286,10 +287,10 @@
};
/*
* POSTSCRIPT INFO SERVICE
*
*/
/*
* POSTSCRIPT INFO SERVICE
*
*/
static FT_Int
cff_ps_has_glyph_names( FT_Face face )
@ -356,9 +357,9 @@
/*
* POSTSCRIPT NAME SERVICE
*
*/
* POSTSCRIPT NAME SERVICE
*
*/
static const char*
cff_get_ps_name( CFF_Face face )
@ -422,7 +423,7 @@
/*
* CID INFO SERVICE
* CID INFO SERVICE
*
*/
static FT_Error
@ -467,11 +468,10 @@
if ( supplement )
*supplement = dict->cid_supplement;
}
Fail:
return error;
Fail:
return error;
}

10
src/cff/cffobjs.c
View File

@ -4,7 +4,7 @@
/* */
/* OpenType objects manager (body). */
/* */
/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007 by */
/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@ -446,7 +446,7 @@
/* compute number of glyphs */
if ( dict->cid_registry != 0xFFFFU )
cffface->num_glyphs = dict->cid_count;
cffface->num_glyphs = cff->charset.max_cid;
else
cffface->num_glyphs = cff->charstrings_index.count;
@ -647,11 +647,15 @@
#ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES
/* CID-keyed CFF fonts don't have glyph names -- the SFNT loader */
/* has unset this flag because of the 3.0 `post' table */
/* has unset this flag because of the 3.0 `post' table. */
if ( dict->cid_registry == 0xFFFFU )
cffface->face_flags |= FT_FACE_FLAG_GLYPH_NAMES;
#endif
if ( dict->cid_registry != 0xFFFFU )
cffface->face_flags |= FT_FACE_FLAG_CID_KEYED;
/*******************************************************************/
/* */
/* Compute char maps. */

27
src/cff/cffparse.c
View File

@ -4,7 +4,7 @@
/* */
/* CFF token stream parser (body) */
/* */
/* Copyright 1996-2001, 2002, 2003, 2004, 2007 by */
/* Copyright 1996-2001, 2002, 2003, 2004, 2007, 2008 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@ -202,10 +202,20 @@
if ( nib >= 10 )
break;
if ( divider < 10000000L )
/* Increase precision if the integer part is zero */
/* and we have to scale the real number. */
if ( !result && power_ten )
{
num = num * 10 + nib;
divider *= 10;
power_ten--;
num = num * 10 + nib;
}
else
{
if ( divider < 10000000L )
{
num = num * 10 + nib;
divider *= 10;
}
}
}
@ -248,10 +258,10 @@
power_ten += (FT_Int)exponent;
}
/* Move the integer part into the high 16 bits. */
/* Move the integer part into the higher 16 bits. */
result <<= 16;
/* Place the decimal part into the low 16 bits. */
/* Place the decimal part into the lower 16 bits. */
if ( num )
result |= FT_DivFix( num, divider );
@ -337,7 +347,10 @@
temp = FT_ABS( matrix->yy );
*upm = (FT_UShort)FT_DivFix( 0x10000L, FT_DivFix( temp, 1000 ) );
*upm = (FT_UShort)FT_DivFix( 1000, temp );
/* we normalize the matrix so that `matrix->xx' is 1; */
/* the scaling is done with `units_per_em' then */
if ( temp != 0x10000L )
{

63
src/cid/cidriver.c
View File

@ -4,7 +4,7 @@
/* */
/* CID driver interface (body). */
/* */
/* Copyright 1996-2001, 2002, 2003, 2004, 2006 by */
/* Copyright 1996-2001, 2002, 2003, 2004, 2006, 2008 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@ -27,6 +27,8 @@
#include FT_SERVICE_POSTSCRIPT_NAME_H
#include FT_SERVICE_XFREE86_NAME_H
#include FT_SERVICE_POSTSCRIPT_INFO_H
#include FT_SERVICE_CID_H
/*************************************************************************/
/* */
@ -38,10 +40,10 @@
#define FT_COMPONENT trace_ciddriver
/*
* POSTSCRIPT NAME SERVICE
*
*/
/*
* POSTSCRIPT NAME SERVICE
*
*/
static const char*
cid_get_postscript_name( CID_Face face )
@ -62,10 +64,10 @@
};
/*
* POSTSCRIPT INFO SERVICE
*
*/
/*
* POSTSCRIPT INFO SERVICE
*
*/
static FT_Error
cid_ps_get_font_info( FT_Face face,
@ -84,16 +86,49 @@
};
/*
* SERVICE LIST
*
*/
/*
* CID INFO SERVICE
*
*/
static FT_Error
cid_get_ros( CID_Face face,
const char* *registry,
const char* *ordering,
FT_Int *supplement )
{
CID_FaceInfo cid = &face->cid;
if ( registry )
*registry = cid->registry;
if ( ordering )
*ordering = cid->ordering;
if ( supplement )
*supplement = cid->supplement;
return CID_Err_Ok;
}
static const FT_Service_CIDRec cid_service_cid_info =
{
(FT_CID_GetRegistryOrderingSupplementFunc)cid_get_ros
};
/*
* SERVICE LIST
*
*/
static const FT_ServiceDescRec cid_services[] =
{
{ FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &cid_service_ps_name },
{ FT_SERVICE_ID_XF86_NAME, FT_XF86_FORMAT_CID },
{ FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &cid_service_ps_name },
{ FT_SERVICE_ID_POSTSCRIPT_INFO, &cid_service_ps_info },
{ FT_SERVICE_ID_CID, &cid_service_cid_info },
{ NULL, NULL }
};