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[autofit] Introduce two more slots for standard characters. 

This is useful for OpenType features like `c2sc' (caps to small
caps) that don't have lowercase letters by definition, or other
features that mainly operate on numerals.

* src/autofit/afscript.h: Add more standard characters.

* src/autofit/aftypes.h: Update use of `SCRIPT' macro.
(AF_ScriptClassRec): Add members to hold two more standard
characters.
(AF_DEFINE_SCRIPT_CLASS): Updated.

* src/autofit/afglobal.c, src/autofit/afglobal.h,
* src/autofit/afpic.c, src/autofit/afranges.h, src/autofit/hbshim.c:
Update use of `SCRIPT' macro.

* src/autofit/afcjk.c (af_cjk_metrics_init_widths),
src/autofit/aflatin.c (af_latin_metrics_init_widths): Scan two more
standard characters.
This commit is contained in:
Werner Lemberg 2014-01-26 09:45:23 +01:00
parent eb7691cc3d
commit a336400112
10 changed files with 152 additions and 54 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
ChangeLog
View File

@ -1,3 +1,26 @@
2014-01-26 Werner Lemberg <wl@gnu.org>
[autofit] Introduce two more slots for standard characters.
This is useful for OpenType features like `c2sc' (caps to small
caps) that don't have lowercase letters by definition, or other
features that mainly operate on numerals.
* src/autofit/afscript.h: Add more standard characters.
* src/autofit/aftypes.h: Update use of `SCRIPT' macro.
(AF_ScriptClassRec): Add members to hold two more standard
characters.
(AF_DEFINE_SCRIPT_CLASS): Updated.
* src/autofit/afglobal.c, src/autofit/afglobal.h,
* src/autofit/afpic.c, src/autofit/afranges.h, src/autofit/hbshim.c:
Update use of `SCRIPT' macro.
* src/autofit/afcjk.c (af_cjk_metrics_init_widths),
src/autofit/aflatin.c (af_latin_metrics_init_widths): Scan two more
standard characters.
2014-01-24 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #41320.

34
src/autofit/afcjk.c
View File

@ -101,16 +101,46 @@
AF_ScriptClass script_class = AF_SCRIPT_CLASSES_GET
[style_class->script];
FT_UInt32 standard_char;
af_get_char_index( &metrics->root,
script_class->standard_char,
script_class->standard_char1,
&glyph_index,
&y_offset );
if ( glyph_index == 0 )
{
if ( script_class->standard_char2 )
{
af_get_char_index( &metrics->root,
script_class->standard_char2,
&glyph_index,
&y_offset );
if ( glyph_index == 0 )
{
if ( script_class->standard_char3 )
{
af_get_char_index( &metrics->root,
script_class->standard_char3,
&glyph_index,
&y_offset );
if ( glyph_index == 0 )
goto Exit;
else
standard_char = script_class->standard_char3;
}
}
else
standard_char = script_class->standard_char2;
}
else
goto Exit;
}
else
standard_char = script_class->standard_char1;
FT_TRACE5(( "standard character: U+%04lX (glyph index %d)\n",
script_class->standard_char, glyph_index ));
standard_char, glyph_index ));
error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_SCALE );
if ( error || face->glyph->outline.n_points <= 0 )

6
src/autofit/afglobal.c
View File

@ -42,12 +42,12 @@
#undef SCRIPT
#define SCRIPT( s, S, d, h, dc ) \
#define SCRIPT( s, S, d, h, sc1, sc2, sc3 ) \
AF_DEFINE_SCRIPT_CLASS( \
af_ ## s ## _script_class, \
AF_SCRIPT_ ## S, \
af_ ## s ## _uniranges, \
dc )
sc1, sc2, sc3 )
#include "afscript.h"
@ -82,7 +82,7 @@
#undef SCRIPT
#define SCRIPT( s, S, d, h, dc ) \
#define SCRIPT( s, S, d, h, sc1, sc2, sc3 ) \
&af_ ## s ## _script_class,
FT_LOCAL_ARRAY_DEF( AF_ScriptClass )

4
src/autofit/afglobal.h
View File

@ -5,7 +5,7 @@
/* Auto-fitter routines to compute global hinting values */
/* (specification). */
/* */
/* Copyright 2003-2005, 2007, 2009, 2011-2013 by */
/* Copyright 2003-2005, 2007, 2009, 2011-2014 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@ -34,7 +34,7 @@ FT_BEGIN_HEADER
#undef SCRIPT
#define SCRIPT( s, S, d, h, dc ) \
#define SCRIPT( s, S, d, h, sc1, sc2, sc3 ) \
AF_DECLARE_SCRIPT_CLASS( af_ ## s ## _script_class )
#include "afscript.h"

44
src/autofit/aflatin.c
View File

@ -88,19 +88,53 @@
AF_ScriptClass script_class = AF_SCRIPT_CLASSES_GET
[style_class->script];
FT_UInt32 standard_char;
/*
* We check more than a single standard character to catch features
* like `c2sc' (small caps from caps) that don't contain lowercase
* letters by definition, or other features that mainly operate on
* numerals.
*/
/* XXX: Extend this with a list of possible standard characters: */
/* Especially in non-default coverages, a single standard */
/* character may not be available. */
af_get_char_index( &metrics->root,
script_class->standard_char,
script_class->standard_char1,
&glyph_index,
&y_offset );
if ( glyph_index == 0 )
{
if ( script_class->standard_char2 )
{
af_get_char_index( &metrics->root,
script_class->standard_char2,
&glyph_index,
&y_offset );
if ( glyph_index == 0 )
{
if ( script_class->standard_char3 )
{
af_get_char_index( &metrics->root,
script_class->standard_char3,
&glyph_index,
&y_offset );
if ( glyph_index == 0 )
goto Exit;
else
standard_char = script_class->standard_char3;
}
}
else
standard_char = script_class->standard_char2;
}
else
goto Exit;
}
else
standard_char = script_class->standard_char1;
FT_TRACE5(( "standard character: U+%04lX (glyph index %d)\n",
script_class->standard_char, glyph_index ));
standard_char, glyph_index ));
error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_SCALE );
if ( error || face->glyph->outline.n_points <= 0 )

4
src/autofit/afpic.c
View File

@ -4,7 +4,7 @@
/* */
/* The FreeType position independent code services for autofit module. */
/* */
/* Copyright 2009-2013 by */
/* Copyright 2009-2014 by */
/* Oran Agra and Mickey Gabel. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@ -122,7 +122,7 @@
#include "afwrtsys.h"
#undef SCRIPT
#define SCRIPT( s, S, d, h, dc ) \
#define SCRIPT( s, S, d, h, sc1, sc2, sc3 ) \
FT_Init_Class_af_ ## s ## _script_class( \
&container->af_script_classes_rec[ss++] );

4
src/autofit/afranges.h
View File

@ -4,7 +4,7 @@
/* */
/* Auto-fitter Unicode script ranges (specification). */
/* */
/* Copyright 2013 by */
/* Copyright 2013, 2014 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@ -26,7 +26,7 @@
FT_BEGIN_HEADER
#undef SCRIPT
#define SCRIPT( s, S, d, h, dc ) \
#define SCRIPT( s, S, d, h, sc1, sc2, sc3 ) \
extern const AF_Script_UniRangeRec af_ ## s ## _uniranges[];
#include "afscript.h"

44
src/autofit/afscript.h
View File

@ -23,105 +23,105 @@
/* Add new scripts here. The first and second arguments are the */
/* script name in lowercase and uppercase, respectively, followed */
/* by a description string. Then comes the corresponding HarfBuzz */
/* script name tag, followed by the default character (to derive */
/* the standard width and height of stems). */
/* script name tag, followed by a string of standard characters (to */
/* derive the standard width and height of stems). */
SCRIPT( cyrl, CYRL,
"Cyrillic",
HB_SCRIPT_CYRILLIC,
0x43E ) /* о */
0x43E, 0x41E, 0x0 ) /* оО */
SCRIPT( grek, GREK,
"Greek",
HB_SCRIPT_GREEK,
0x3BF ) /* ο */
0x3BF, 0x39F, 0x0 ) /* οΟ */
SCRIPT( hebr, HEBR,
"Hebrew",
HB_SCRIPT_HEBREW,
0x5DD ) /* ם */
0x5DD, 0x0, 0x0 ) /* ם */
SCRIPT( latn, LATN,
"Latin",
HB_SCRIPT_LATIN,
'o' )
'o', 'O', '0' )
SCRIPT( none, NONE,
"no script",
HB_SCRIPT_INVALID,
'\0' )
0x0, 0x0, 0x0 )
#ifdef AF_CONFIG_OPTION_INDIC
SCRIPT( beng, BENG,
"Bengali",
HB_SCRIPT_BENGALI,
'o' ) /* XXX */
'o', 0x0, 0x0 ) /* XXX */
SCRIPT( deva, DEVA,
"Devanagari",
HB_SCRIPT_DEVANAGARI,
'o' ) /* XXX */
'o', 0x0, 0x0 ) /* XXX */
SCRIPT( gujr, GUJR,
"Gujarati",
HB_SCRIPT_GUJARATI,
'o' ) /* XXX */
'o', 0x0, 0x0 ) /* XXX */
SCRIPT( guru, GURU,
"Gurmukhi",
HB_SCRIPT_GURMUKHI,
'o' ) /* XXX */
'o', 0x0, 0x0 ) /* XXX */
SCRIPT( knda, KNDA,
"Kannada",
HB_SCRIPT_KANNADA,
'o' ) /* XXX */
'o', 0x0, 0x0 ) /* XXX */
SCRIPT( limb, LIMB,
"Limbu",
HB_SCRIPT_LIMBU,
'o' ) /* XXX */
'o', 0x0, 0x0 ) /* XXX */
SCRIPT( mlym, MLYM,
"Malayalam",
HB_SCRIPT_MALAYALAM,
'o' ) /* XXX */
'o', 0x0, 0x0 ) /* XXX */
SCRIPT( orya, ORYA,
"Oriya",
HB_SCRIPT_ORIYA,
'o' ) /* XXX */
'o', 0x0, 0x0 ) /* XXX */
SCRIPT( sinh, SINH,
"Sinhala",
HB_SCRIPT_SINHALA,
'o' ) /* XXX */
'o', 0x0, 0x0 ) /* XXX */
SCRIPT( sund, SUND,
"Sundanese",
HB_SCRIPT_SUNDANESE,
'o' ) /* XXX */
'o', 0x0, 0x0 ) /* XXX */
SCRIPT( sylo, SYLO,
"Syloti Nagri",
HB_SCRIPT_SYLOTI_NAGRI,
'o' ) /* XXX */
'o', 0x0, 0x0 ) /* XXX */
SCRIPT( taml, TAML,
"Tamil",
HB_SCRIPT_TAMIL,
'o' ) /* XXX */
'o', 0x0, 0x0 ) /* XXX */
SCRIPT( telu, TELU,
"Telugu",
HB_SCRIPT_TELUGU,
'o' ) /* XXX */
'o', 0x0, 0x0 ) /* XXX */
SCRIPT( tibt, TIBT,
"Tibetan",
HB_SCRIPT_TIBETAN,
'o' ) /* XXX */
'o', 0x0, 0x0 ) /* XXX */
#endif /* AF_CONFIG_OPTION_INDIC */
@ -130,7 +130,7 @@
SCRIPT( hani, HANI,
"CJKV ideographs",
HB_SCRIPT_HAN,
0x7530 ) /* 田 */
0x7530, 0x56D7, 0x0 ) /* 田囗 */
#endif /* AF_CONFIG_OPTION_CJK */

23
src/autofit/aftypes.h
View File

@ -303,7 +303,7 @@ extern void* _af_debug_hints;
*/
#undef SCRIPT
#define SCRIPT( s, S, d, h, dc ) \
#define SCRIPT( s, S, d, h, sc1, sc2, sc3 ) \
AF_SCRIPT_ ## S,
/* The list of known scripts. */
@ -334,7 +334,10 @@ extern void* _af_debug_hints;
AF_Script script;
AF_Script_UniRange script_uni_ranges; /* last must be { 0, 0 } */
FT_UInt32 standard_char; /* for default width and height */
FT_UInt32 standard_char1; /* for default width and height */
FT_UInt32 standard_char2; /* ditto */
FT_UInt32 standard_char3; /* ditto */
} AF_ScriptClassRec;
@ -510,13 +513,17 @@ extern void* _af_debug_hints;
script_class, \
script, \
ranges, \
std_char ) \
std_char1, \
std_char2, \
std_char3 ) \
FT_CALLBACK_TABLE_DEF \
const AF_ScriptClassRec script_class = \
{ \
script, \
ranges, \
std_char \
std_char1, \
std_char2, \
std_char3 \
};
@ -580,13 +587,17 @@ extern void* _af_debug_hints;
script_class, \
script_, \
ranges, \
std_char ) \
std_char1, \
std_char2, \
std_char3 ) \
FT_LOCAL_DEF( void ) \
FT_Init_Class_ ## script_class( AF_ScriptClassRec* ac ) \
{ \
ac->script = script_; \
ac->script_uni_ranges = ranges; \
ac->standard_char = std_char; \
ac->standard_char1 = std_char1; \
ac->standard_char2 = std_char2; \
ac->standard_char3 = std_char3; \
}

2
src/autofit/hbshim.c
View File

@ -84,7 +84,7 @@
/* load HarfBuzz script tags */
#undef SCRIPT
#define SCRIPT( s, S, d, h, dc ) h,
#define SCRIPT( s, S, d, h, sc1, sc2, sc3 ) h,
static const hb_tag_t scripts[] =