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[autofit] Don't combine multiple features into one set.

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Combining them, as originally envisioned, would lead to much more
complicated code, as investigations have shown meanwhile.  The major
drawback is that we run out of available style slots much earlier.
However, this is only a theoretical issue since we don't support a
large number of scripts currently.

* src/autofit/afcover.h: Replace `COVERAGE_{1,2,3}' macros with
a single-element `COVERAGE' macro, sort the elements by the feature
tags, and add entry for `ruby'.

* src/autofit/aftypes.h: Updated.
* src/autofit/hbshim.c: Updated.
2.6.5
Werner Lemberg 11 years ago
parent 072dc45d27
commit 44aa7e0af5
4 changed files with 107 additions and 120 deletions
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  1. 19
      ChangeLog
  2. 111
      src/autofit/afcover.h
  3. 30
      src/autofit/aftypes.h
  4. 67
      src/autofit/hbshim.c

19
ChangeLog
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@ -1,3 +1,20 @@
2013-12-30 Werner Lemberg <wl@gnu.org>
[autofit] Don't combine multiple features into one set.
Combining them, as originally envisioned, would lead to much more
complicated code, as investigations have shown meanwhile. The major
drawback is that we run out of available style slots much earlier.
However, this is only a theoretical issue since we don't support a
large number of scripts currently.
* src/autofit/afcover.h: Replace `COVERAGE_{1,2,3}' macros with
a single-element `COVERAGE' macro, sort the elements by the feature
tags, and add entry for `ruby'.
* src/autofit/aftypes.h: Updated.
* src/autofit/hbshim.c: Updated.
2013-12-28 Werner Lemberg <wl@gnu.org>
[autofit] Code shuffling to reduce use of cpp macros.
@ -93,7 +110,7 @@
http://lists.gnu.org/archive/html/freetype-devel/2013-12/msg00027.html
* src/base/ftrfork.c (FT_Raccess_Get_DataOffsets): Add a switch
`sort_by_res_id' to control the fragmented resource ordering.
`sort_by_res_id' to control the fragmented resource ordering.
* include/internal/ftrfork.h: Declare new switch.
* src/base/ftobjs.c (IsMacResource): Enable the sorting for `POST'
resource, and disable the sorting for `sfnt' resource.

111
src/autofit/afcover.h
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@ -17,50 +17,79 @@
/* This header file can be included multiple times. */
/* Define `COVERAGE_{1,2,3}' as needed. */
/* Define `COVERAGE' as needed. */
/* Add new coverages here. The first and second arguments are the */
/* coverage name in lowercase and uppercase, respectively, followed */
/* by a description string. The remaining arguments the */
/* corresponding OpenType features (with four characters a feature). */
COVERAGE_1( oldstyle_figures, OLDSTYLE_FIGURES,
"oldstyle figures",
'o', 'n', 'u', 'm' ) /* Oldstyle Figures */
COVERAGE_2( petite_capitals, PETITE_CAPITALS,
"petite capitals",
'c', '2', 'c', 'p', /* Petite Capitals from Capitals */
'p', 'c', 'a', 'p' ) /* Petite Capitals */
COVERAGE_2( small_capitals, SMALL_CAPITALS,
"small capitals",
'c', '2', 's', 'c', /* Small Capitals from Capitals */
's', 'm', 'c', 'p' ) /* Small Capitals */
COVERAGE_1( titling, TITLING,
"titling",
't', 'i', 't', 'l' ) /* Titling */
COVERAGE_2( sub_superscript_1, SUB_SUPERSCRIPT_1,
"sub- and superscripts group 1",
's', 'u', 'b', 's', /* Subscript */
's', 'u', 'p', 's' ) /* Superscript */
COVERAGE_2( sub_superscript_2, SUB_SUPERSCRIPT_2,
"sub- and superscripts group 2",
'o', 'r', 'd', 'n', /* Ordinals */
's', 'i', 'n', 'f' ) /* Scientific Inferiors */
COVERAGE_3( fractions, FRACTIONS,
"fractions",
'd', 'n', 'o', 'm', /* Denominators */
'f', 'r', 'a', 'c', /* Fractions */
'n', 'u', 'm', 'r' ) /* Numerators */
COVERAGE_1( alternative_fractions, ALTERNATIVE_FRACTIONS,
"alternative fractions",
'a', 'f', 'r', 'c' ) /* Alternative Fractions */
/* by a description string. The last four arguments are the four */
/* characters defining the corresponding OpenType feature. */
COVERAGE( alternative_fractions, ALTERNATIVE_FRACTIONS,
"alternative fractions",
'a', 'f', 'r', 'c' )
COVERAGE( petite_capitals_from_capitals, PETITE_CAPITALS_FROM_CAPITALS,
"petite capitals from capitals",
'c', '2', 'c', 'p' )
COVERAGE( small_capitals_from_capitals, SMALL_CAPITALS_FROM_CAPITALS,
"small capitals from capitals",
'c', '2', 's', 'c' )
COVERAGE( denominators, DENOMINATORS,
"denominators",
'd', 'n', 'o', 'm' )
COVERAGE( fractions, FRACTIONS,
"fractions",
'f', 'r', 'a', 'c' )
COVERAGE( numerators, NUMERATORS,
"numerators",
'n', 'u', 'm', 'r' )
COVERAGE( oldstyle_figures, OLDSTYLE_FIGURES,
"oldstyle figures",
'o', 'n', 'u', 'm' )
COVERAGE( ordinals, ORDINALS,
"ordinals",
'o', 'r', 'd', 'n' )
COVERAGE( petite_capitals, PETITE_CAPITALS,
"petite capitals",
'p', 'c', 'a', 'p' )
COVERAGE( ruby, RUBY,
"ruby",
'r', 'u', 'b', 'y' )
COVERAGE( scientific_inferiors, SCIENTIFIC_INFERIORS,
"scientific inferiors",
's', 'i', 'n', 'f' )
COVERAGE( small_capitals, SMALL_CAPITALS,
"small capitals",
's', 'm', 'c', 'p' )
COVERAGE( subscript, SUBSCRIPT,
"subscript",
's', 'u', 'b', 's' )
COVERAGE( superscript, SUPERSCRIPT,
"superscript",
's', 'u', 'p', 's' )
COVERAGE( titling, TITLING,
"titling",
't', 'i', 't', 'l' )
#if 0
/* to be always excluded */
COVERAGE(nalt, 'n', 'a', 'l', 't'); /* Alternate Annotation Forms (?) */
COVERAGE(ornm, 'o', 'r', 'n', 'm'); /* Ornaments (?) */
#endif
/* END */

30
src/autofit/aftypes.h
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@ -370,12 +370,11 @@ extern void* _af_debug_hints;
* representation forms. How this mapping happens is completely
* uninteresting to us.
*
* For the auto-hinter, a `coverage' represents all glyphs of one or more
* OpenType features collected in a set (as listed below) that can be
* hinted together. To continue the above example, superscript glyphs
* must not be hinted together with normal glyphs because the blue zones
* completely differ. On the other hand, superscripts and subscripts
* don't overlap, so they can be combined into a single set.
* For the auto-hinter, a `coverage' represents all glyphs of an OpenType
* feature collected in a set (as listed below) that can be hinted
* together. To continue the above example, superscript glyphs must not
* be hinted together with normal glyphs because the blue zones
* completely differ.
*
* Note that FreeType itself doesn't compute coverages; it only provides
* the glyphs addressable by the default Unicode character map. Instead,
@ -389,22 +388,9 @@ extern void* _af_debug_hints;
*
*/
#undef COVERAGE_1
#define COVERAGE_1( name, NAME, description, \
tag_a1, tag_a2, tag_a3, tag_a4 ) \
AF_COVERAGE_ ## NAME,
#undef COVERAGE_2
#define COVERAGE_2( name, NAME, description, \
tag_a1, tag_a2, tag_a3, tag_a4, \
tag_b1, tag_b2, tag_b3, tag_b4 ) \
AF_COVERAGE_ ## NAME,
#undef COVERAGE_3
#define COVERAGE_3( name, NAME, description, \
tag_a1, tag_a2, tag_a3, tag_a4, \
tag_b1, tag_b2, tag_b3, tag_b4, \
tag_c1, tag_c2, tag_c3, tag_c4 ) \
#undef COVERAGE
#define COVERAGE( name, NAME, description, \
tag1, tag2, tag3, tag4 ) \
AF_COVERAGE_ ## NAME,

67
src/autofit/hbshim.c
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@ -38,10 +38,10 @@
* usual mathematical meaning) to manage both lookups and glyph indices.
*
* 1. For each coverage, collect lookup IDs in a set. Note that an
* auto-hinter `coverage' is represented by one or more `feature's, and
* a feature consists of an arbitrary number of (font specific)
* `lookup's that actually do the mapping job. Please check the
* OpenType specification for more details on features and lookups.
* auto-hinter `coverage' is represented by one `feature', and a
* feature consists of an arbitrary number of (font specific) `lookup's
* that actually do the mapping job. Please check the OpenType
* specification for more details on features and lookups.
*
* 2. Create glyph ID sets from the corresponding lookup sets.
*
@ -54,36 +54,12 @@
/* load coverage tags */
#undef COVERAGE_1
#define COVERAGE_1( name, NAME, description, \
tag_a1, tag_a2, tag_a3, tag_a4 ) \
#undef COVERAGE
#define COVERAGE( name, NAME, description, \
tag1, tag2, tag3, tag4 ) \
static const hb_tag_t name ## _coverage[] = \
{ \
HB_TAG( tag_a1, tag_a2, tag_a3, tag_a4 ), \
HB_TAG_NONE \
};
#undef COVERAGE_2
#define COVERAGE_2( name, NAME, description, \
tag_a1, tag_a2, tag_a3, tag_a4, \
tag_b1, tag_b2, tag_b3, tag_b4 ) \
static const hb_tag_t name ## _coverage[] = \
{ \
HB_TAG( tag_a1, tag_a2, tag_a3, tag_a4 ), \
HB_TAG( tag_b1, tag_b2, tag_b3, tag_b4 ), \
HB_TAG_NONE \
};
#undef COVERAGE_3
#define COVERAGE_3( name, NAME, description, \
tag_a1, tag_a2, tag_a3, tag_a4, \
tag_b1, tag_b2, tag_b3, tag_b4, \
tag_c1, tag_c2, tag_c3, tag_c4 ) \
static const hb_tag_t name ## _coverage[] = \
{ \
HB_TAG( tag_a1, tag_a2, tag_a3, tag_a4 ), \
HB_TAG( tag_b1, tag_b2, tag_b3, tag_b4 ), \
HB_TAG( tag_c1, tag_c2, tag_c3, tag_c4 ), \
HB_TAG( tag1, tag2, tag3, tag4 ), \
HB_TAG_NONE \
};
@ -92,22 +68,9 @@
/* define mapping between coverage tags and AF_Coverage */
#undef COVERAGE_1
#define COVERAGE_1( name, NAME, description, \
tag_a1, tag_a2, tag_a3, tag_a4 ) \
name ## _coverage,
#undef COVERAGE_2
#define COVERAGE_2( name, NAME, description, \
tag_a1, tag_a2, tag_a3, tag_a4, \
tag_b1, tag_b2, tag_b3, tag_b4 ) \
name ## _coverage,
#undef COVERAGE_3
#define COVERAGE_3( name, NAME, description, \
tag_a1, tag_a2, tag_a3, tag_a4, \
tag_b1, tag_b2, tag_b3, tag_b4, \
tag_c1, tag_c2, tag_c3, tag_c4 ) \
#undef COVERAGE
#define COVERAGE( name, NAME, description, \
tag1, tag2, tag3, tag4 ) \
name ## _coverage,
@ -283,14 +246,6 @@
}
#if 0
/* to be always excluded */
COVERAGE(nalt, 'n', 'a', 'l', 't'); /* Alternate Annotation Forms (?) */
COVERAGE(ornm, 'o', 'r', 'n', 'm'); /* Ornaments (?) */
/* COVERAGE(ruby, 'r', 'u', 'b', 'y') */ /* (only for Japanese) */
#endif
#else /* !FT_CONFIG_OPTION_USE_HARDBUZZ */

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