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[autofit] Fix Savannah bug #42148.

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The adaptation of the cjk auto-hinter module to blue stringsets in
2013-08-25 had three severe bugs.  Mea culpa.

1. Contrary to the latin auto-hinter, characters for reference and
   overshoot values of a blue zone are specified separately.  Due to
   the screwed-up change it didn't work at all.

2. A boolean comparison was erroneously replaced with a cast,
   causing invalid results with the `^' operator later on.  The
   visual artifact caused by this problem is the topic of the bug
   report.

3. Two flag values were inverted, causing incorrect assignment of
   reference and overshoot values.

* src/autofit/afblue.dat: Fix CJK bluestrings, introducing a new
syntax to have both reference and overshoot characters in a single
string.  This is error #1.
Add extensive comments.

* src/autofit/afblue.hin (AF_BLUE_PROPERTY_CJK_FILL): Removed, no
longer used.
(AF_BLUE_PROPERTY_CJK_TOP, AF_BLUE_PROPERTY_CJK_HORIZ): Fix values.
This is error #3.

* src/autofit/afblue.c, src/autofit/afblue.h: Regenerated.

* src/autofit/afcjk.c (af_cjk_metrics_init_blues): Correct error #1.
Use character `|' to separate characters for reference and overshoot
values.
Improve tracing messages, synchronizing them with the latin
auto-hinter.
(af_cjk_hints_compute_blue_edges): Fix value of `is_top_right_blue'.
This is error #2.
(af_cjk_align_linked_edge): Add tracing message.

* src/autofit/afcjk.h (AF_CJK_IS_FILLED_BLUE): Removed, no longer
used.
2.6.5
Werner Lemberg 11 years ago
parent 8a2b690c0a
commit 98e510ee94
8 changed files with 205 additions and 103 deletions
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  1. 43
      ChangeLog
  2. 32
      src/autofit/afblue.c
  3. 117
      src/autofit/afblue.dat
  4. 27
      src/autofit/afblue.h
  5. 7
      src/autofit/afblue.hin
  6. 76
      src/autofit/afcjk.c
  7. 4
      src/autofit/afcjk.h
  8. 2
      src/autofit/aflatin.c

43
ChangeLog
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@ -1,3 +1,46 @@
2014-04-20 Werner Lemberg <wl@gnu.org>
[autofit] Fix Savannah bug #42148.
The adaptation of the cjk auto-hinter module to blue stringsets in
2013-08-25 had three severe bugs. Mea culpa.
1. Contrary to the latin auto-hinter, characters for reference and
overshoot values of a blue zone are specified separately. Due to
the screwed-up change it didn't work at all.
2. A boolean comparison was erroneously replaced with a cast,
causing invalid results with the `^' operator later on. The
visual artifact caused by this problem is the topic of the bug
report.
3. Two flag values were inverted, causing incorrect assignment of
reference and overshoot values.
* src/autofit/afblue.dat: Fix CJK bluestrings, introducing a new
syntax to have both reference and overshoot characters in a single
string. This is error #1.
Add extensive comments.
* src/autofit/afblue.hin (AF_BLUE_PROPERTY_CJK_FILL): Removed, no
longer used.
(AF_BLUE_PROPERTY_CJK_TOP, AF_BLUE_PROPERTY_CJK_HORIZ): Fix values.
This is error #3.
* src/autofit/afblue.c, src/autofit/afblue.h: Regenerated.
* src/autofit/afcjk.c (af_cjk_metrics_init_blues): Correct error #1.
Use character `|' to separate characters for reference and overshoot
values.
Improve tracing messages, synchronizing them with the latin
auto-hinter.
(af_cjk_hints_compute_blue_edges): Fix value of `is_top_right_blue'.
This is error #2.
(af_cjk_align_linked_edge): Add tracing message.
* src/autofit/afcjk.h (AF_CJK_IS_FILLED_BLUE): Removed, no longer
used.
2014-04-17 Werner Lemberg <wl@gnu.org>
[autofit] More coverage fixes for complex scripts.

32
src/autofit/afblue.c
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@ -64,8 +64,7 @@
'\xE4', '\xBB', '\x96', '\xE4', '\xBB', '\xAC', '\xE4', '\xBD', '\xA0', '\xE4', '\xBE', '\x86', '\xE5', '\x80', '\x91', '\xE5', '\x88', '\xB0', '\xE5', '\x92', '\x8C', '\xE5', '\x9C', '\xB0', /* 他们你來們到和地 */
'\xE5', '\xAF', '\xB9', '\xE5', '\xB0', '\x8D', '\xE5', '\xB0', '\xB1', '\xE5', '\xB8', '\xAD', '\xE6', '\x88', '\x91', '\xE6', '\x97', '\xB6', '\xE6', '\x99', '\x82', '\xE6', '\x9C', '\x83', /* 对對就席我时時會 */
'\xE6', '\x9D', '\xA5', '\xE7', '\x82', '\xBA', '\xE8', '\x83', '\xBD', '\xE8', '\x88', '\xB0', '\xE8', '\xAA', '\xAA', '\xE8', '\xAF', '\xB4', '\xE8', '\xBF', '\x99', '\xE9', '\x80', '\x99', /* 来為能舰說说这這 */
'\xE9', '\xBD', '\x8A', /* 齊 */
'\0',
'\xE9', '\xBD', '\x8A', '|', /* 齊 | */
'\xE5', '\x86', '\x9B', '\xE5', '\x90', '\x8C', '\xE5', '\xB7', '\xB2', '\xE6', '\x84', '\xBF', '\xE6', '\x97', '\xA2', '\xE6', '\x98', '\x9F', '\xE6', '\x98', '\xAF', '\xE6', '\x99', '\xAF', /* 军同已愿既星是景 */
'\xE6', '\xB0', '\x91', '\xE7', '\x85', '\xA7', '\xE7', '\x8E', '\xB0', '\xE7', '\x8F', '\xBE', '\xE7', '\x90', '\x86', '\xE7', '\x94', '\xA8', '\xE7', '\xBD', '\xAE', '\xE8', '\xA6', '\x81', /* 民照现現理用置要 */
'\xE8', '\xBB', '\x8D', '\xE9', '\x82', '\xA3', '\xE9', '\x85', '\x8D', '\xE9', '\x87', '\x8C', '\xE9', '\x96', '\x8B', '\xE9', '\x9B', '\xB7', '\xE9', '\x9C', '\xB2', '\xE9', '\x9D', '\xA2', /* 軍那配里開雷露面 */
@ -74,8 +73,7 @@
'\xE4', '\xB8', '\xAA', '\xE4', '\xB8', '\xBA', '\xE4', '\xBA', '\xBA', '\xE4', '\xBB', '\x96', '\xE4', '\xBB', '\xA5', '\xE4', '\xBB', '\xAC', '\xE4', '\xBD', '\xA0', '\xE4', '\xBE', '\x86', /* 个为人他以们你來 */
'\xE5', '\x80', '\x8B', '\xE5', '\x80', '\x91', '\xE5', '\x88', '\xB0', '\xE5', '\x92', '\x8C', '\xE5', '\xA4', '\xA7', '\xE5', '\xAF', '\xB9', '\xE5', '\xB0', '\x8D', '\xE5', '\xB0', '\xB1', /* 個們到和大对對就 */
'\xE6', '\x88', '\x91', '\xE6', '\x97', '\xB6', '\xE6', '\x99', '\x82', '\xE6', '\x9C', '\x89', '\xE6', '\x9D', '\xA5', '\xE7', '\x82', '\xBA', '\xE8', '\xA6', '\x81', '\xE8', '\xAA', '\xAA', /* 我时時有来為要說 */
'\xE8', '\xAF', '\xB4', /* 说 */
'\0',
'\xE8', '\xAF', '\xB4', '|', /* 说 | */
'\xE4', '\xB8', '\xBB', '\xE4', '\xBA', '\x9B', '\xE5', '\x9B', '\xA0', '\xE5', '\xAE', '\x83', '\xE6', '\x83', '\xB3', '\xE6', '\x84', '\x8F', '\xE7', '\x90', '\x86', '\xE7', '\x94', '\x9F', /* 主些因它想意理生 */
'\xE7', '\x95', '\xB6', '\xE7', '\x9C', '\x8B', '\xE7', '\x9D', '\x80', '\xE7', '\xBD', '\xAE', '\xE8', '\x80', '\x85', '\xE8', '\x87', '\xAA', '\xE8', '\x91', '\x97', '\xE8', '\xA3', '\xA1', /* 當看着置者自著裡 */
'\xE8', '\xBF', '\x87', '\xE8', '\xBF', '\x98', '\xE8', '\xBF', '\x9B', '\xE9', '\x80', '\xB2', '\xE9', '\x81', '\x8E', '\xE9', '\x81', '\x93', '\xE9', '\x82', '\x84', '\xE9', '\x87', '\x8C', /* 过还进進過道還里 */
@ -85,8 +83,7 @@
'\xE4', '\xBA', '\x9B', '\xE4', '\xBB', '\xAC', '\xE4', '\xBD', '\xA0', '\xE4', '\xBE', '\x86', '\xE5', '\x80', '\x91', '\xE5', '\x88', '\xB0', '\xE5', '\x92', '\x8C', '\xE5', '\x9C', '\xB0', /* 些们你來們到和地 */
'\xE5', '\xA5', '\xB9', '\xE5', '\xB0', '\x86', '\xE5', '\xB0', '\x87', '\xE5', '\xB0', '\xB1', '\xE5', '\xB9', '\xB4', '\xE5', '\xBE', '\x97', '\xE6', '\x83', '\x85', '\xE6', '\x9C', '\x80', /* 她将將就年得情最 */
'\xE6', '\xA0', '\xB7', '\xE6', '\xA8', '\xA3', '\xE7', '\x90', '\x86', '\xE8', '\x83', '\xBD', '\xE8', '\xAA', '\xAA', '\xE8', '\xAF', '\xB4', '\xE8', '\xBF', '\x99', '\xE9', '\x80', '\x99', /* 样樣理能說说这這 */
'\xE9', '\x80', '\x9A', /* 通 */
'\0',
'\xE9', '\x80', '\x9A', '|', /* 通 | */
'\xE5', '\x8D', '\xB3', '\xE5', '\x90', '\x97', '\xE5', '\x90', '\xA7', '\xE5', '\x90', '\xAC', '\xE5', '\x91', '\xA2', '\xE5', '\x93', '\x81', '\xE5', '\x93', '\x8D', '\xE5', '\x97', '\x8E', /* 即吗吧听呢品响嗎 */
'\xE5', '\xB8', '\x88', '\xE5', '\xB8', '\xAB', '\xE6', '\x94', '\xB6', '\xE6', '\x96', '\xAD', '\xE6', '\x96', '\xB7', '\xE6', '\x98', '\x8E', '\xE7', '\x9C', '\xBC', '\xE9', '\x96', '\x93', /* 师師收断斷明眼間 */
'\xE9', '\x97', '\xB4', '\xE9', '\x99', '\x85', '\xE9', '\x99', '\x88', '\xE9', '\x99', '\x90', '\xE9', '\x99', '\xA4', '\xE9', '\x99', '\xB3', '\xE9', '\x9A', '\x8F', '\xE9', '\x9A', '\x9B', /* 间际陈限除陳随際 */
@ -95,8 +92,7 @@
'\xE4', '\xBA', '\x8B', '\xE5', '\x89', '\x8D', '\xE5', '\xAD', '\xB8', '\xE5', '\xB0', '\x86', '\xE5', '\xB0', '\x87', '\xE6', '\x83', '\x85', '\xE6', '\x83', '\xB3', '\xE6', '\x88', '\x96', /* 事前學将將情想或 */
'\xE6', '\x94', '\xBF', '\xE6', '\x96', '\xAF', '\xE6', '\x96', '\xB0', '\xE6', '\xA0', '\xB7', '\xE6', '\xA8', '\xA3', '\xE6', '\xB0', '\x91', '\xE6', '\xB2', '\x92', '\xE6', '\xB2', '\xA1', /* 政斯新样樣民沒没 */
'\xE7', '\x84', '\xB6', '\xE7', '\x89', '\xB9', '\xE7', '\x8E', '\xB0', '\xE7', '\x8F', '\xBE', '\xE7', '\x90', '\x83', '\xE7', '\xAC', '\xAC', '\xE7', '\xB6', '\x93', '\xE8', '\xB0', '\x81', /* 然特现現球第經谁 */
'\xE8', '\xB5', '\xB7', /* 起 */
'\0',
'\xE8', '\xB5', '\xB7', '|', /* 起 | */
'\xE4', '\xBE', '\x8B', '\xE5', '\x88', '\xA5', '\xE5', '\x88', '\xAB', '\xE5', '\x88', '\xB6', '\xE5', '\x8A', '\xA8', '\xE5', '\x8B', '\x95', '\xE5', '\x90', '\x97', '\xE5', '\x97', '\x8E', /* 例別别制动動吗嗎 */
'\xE5', '\xA2', '\x9E', '\xE6', '\x8C', '\x87', '\xE6', '\x98', '\x8E', '\xE6', '\x9C', '\x9D', '\xE6', '\x9C', '\x9F', '\xE6', '\x9E', '\x84', '\xE7', '\x89', '\xA9', '\xE7', '\xA1', '\xAE', /* 增指明朝期构物确 */
'\xE7', '\xA7', '\x8D', '\xE8', '\xAA', '\xBF', '\xE8', '\xB0', '\x83', '\xE8', '\xB2', '\xBB', '\xE8', '\xB4', '\xB9', '\xE9', '\x82', '\xA3', '\xE9', '\x83', '\xBD', '\xE9', '\x96', '\x93', /* 种調调費费那都間 */
@ -142,22 +138,14 @@
{ AF_BLUE_STRING_HEBREW_DESCENDER, 0 },
{ AF_BLUE_STRING_MAX, 0 },
#ifdef AF_CONFIG_OPTION_CJK
{ AF_BLUE_STRING_CJK_TOP_FILL, AF_BLUE_PROPERTY_CJK_TOP |
AF_BLUE_PROPERTY_CJK_FILL },
{ AF_BLUE_STRING_CJK_TOP_UNFILL, AF_BLUE_PROPERTY_CJK_TOP },
{ AF_BLUE_STRING_CJK_BOTTOM_FILL, AF_BLUE_PROPERTY_CJK_FILL },
{ AF_BLUE_STRING_CJK_BOTTOM_UNFILL, 0 },
{ AF_BLUE_STRING_CJK_TOP, AF_BLUE_PROPERTY_CJK_TOP },
{ AF_BLUE_STRING_CJK_BOTTOM, 0 },
#ifdef AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT
{ AF_BLUE_STRING_CJK_LEFT_FILL, AF_BLUE_PROPERTY_CJK_HORIZ |
AF_BLUE_PROPERTY_CJK_FILL },
{ AF_BLUE_STRING_CJK_LEFT_UNFILL, AF_BLUE_PROPERTY_CJK_HORIZ },
{ AF_BLUE_STRING_CJK_RIGHT_FILL, AF_BLUE_PROPERTY_CJK_HORIZ |
AF_BLUE_PROPERTY_CJK_RIGHT |
AF_BLUE_PROPERTY_CJK_FILL },
{ AF_BLUE_STRING_CJK_RIGHT_UNFILL, AF_BLUE_PROPERTY_CJK_HORIZ |
AF_BLUE_PROPERTY_CJK_RIGHT },
{ AF_BLUE_STRING_CJK_LEFT, AF_BLUE_PROPERTY_CJK_HORIZ },
{ AF_BLUE_STRING_CJK_RIGHT, AF_BLUE_PROPERTY_CJK_HORIZ |
AF_BLUE_PROPERTY_CJK_RIGHT },
#endif /* AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT */
{ AF_BLUE_STRING_MAX, 0 },
{ AF_BLUE_STRING_MAX, 0 },
#endif /* AF_CONFIG_OPTION_CJK */
};

117
src/autofit/afblue.dat
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@ -2,7 +2,7 @@
//
// Auto-fitter data for blue strings.
//
// 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,
@ -63,6 +63,8 @@
// characters, not bytes.
// The blue zone string data, to be used in the blue stringsets below.
AF_BLUE_STRING_ENUM AF_BLUE_STRINGS_ARRAY AF_BLUE_STRING_MAX_LEN:
AF_BLUE_STRING_LATIN_CAPITAL_TOP
@ -105,22 +107,20 @@ AF_BLUE_STRING_ENUM AF_BLUE_STRINGS_ARRAY AF_BLUE_STRING_MAX_LEN:
#ifdef AF_CONFIG_OPTION_CJK
AF_BLUE_STRING_CJK_TOP_FILL
AF_BLUE_STRING_CJK_TOP
"他们你來們到和地"
"对對就席我时時會"
"来為能舰說说这這"
"齊"
AF_BLUE_STRING_CJK_TOP_UNFILL
"齊 |"
"军同已愿既星是景"
"民照现現理用置要"
"軍那配里開雷露面"
"顾"
AF_BLUE_STRING_CJK_BOTTOM_FILL
AF_BLUE_STRING_CJK_BOTTOM
"个为人他以们你來"
"個們到和大对對就"
"我时時有来為要說"
"说"
AF_BLUE_STRING_CJK_BOTTOM_UNFILL
"说 |"
"主些因它想意理生"
"當看着置者自著裡"
"过还进進過道還里"
@ -128,22 +128,20 @@ AF_BLUE_STRING_ENUM AF_BLUE_STRINGS_ARRAY AF_BLUE_STRING_MAX_LEN:
#ifdef AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT
AF_BLUE_STRING_CJK_LEFT_FILL
AF_BLUE_STRING_CJK_LEFT
"些们你來們到和地"
"她将將就年得情最"
"样樣理能說说这這"
"通"
AF_BLUE_STRING_CJK_LEFT_UNFILL
"通 |"
"即吗吧听呢品响嗎"
"师師收断斷明眼間"
"间际陈限除陳随際"
"隨"
AF_BLUE_STRING_CJK_RIGHT_FILL
AF_BLUE_STRING_CJK_RIGHT
"事前學将將情想或"
"政斯新样樣民沒没"
"然特现現球第經谁"
"起"
AF_BLUE_STRING_CJK_RIGHT_UNFILL
"起 |"
"例別别制动動吗嗎"
"增指明朝期构物确"
"种調调費费那都間"
@ -154,6 +152,79 @@ AF_BLUE_STRING_ENUM AF_BLUE_STRINGS_ARRAY AF_BLUE_STRING_MAX_LEN:
#endif /* AF_CONFIG_OPTION_CJK */
// The blue zone stringsets, as used in the script styles, cf. `afstyles.h'.
//
// The AF_BLUE_PROPERTY_XXX flags are defined in `afblue.h'; here some
// explanations.
//
// A blue zone in general is defined by a reference and an overshoot line.
// During the hinting process, all coordinate values between those two lines
// are set equal to the reference value, provided that the blue zone is not
// wider than 0.75 pixels (otherwise the blue zone gets ignored). All
// entries must have `AF_BLUE_STRING_MAX' as the final line.
//
//
// latin auto-hinter
// -----------------
//
// Characters in a blue string are automatically classified as having a flat
// (reference) or a round (overshoot) extremum. The blue zone is then set
// up by the mean values of all flat extrema and all round extrema,
// respectively. Only horizontal blue zones (i.e., adjusting vertical
// coordinate values) are supported.
//
// For the latin auto-hinter, the overshoot should be larger than the
// reference for top zones, and vice versa for bottom zones.
//
// LATIN_TOP
// Take the maximum flat and round coordinate values of the blue string
// characters. If not set, take the minimum values.
//
// LATIN_X_HEIGHT
// Scale all glyphs vertically from the corresponding script to make the
// reference line of this blue zone align on the grid. The scaling
// takes place before all other blue zones get aligned to the grid.
// Only one blue character string of a script style can have this flag.
//
// LATIN_LONG
// Apply an additional constraint for blue zone values: Don't
// necessarily use the extremum as-is but a segment of the topmost (or
// bottommost) contour that is longer than a heuristic threshold, and
// which is not too far away vertically from the real extremum. This
// ensures that small bumps in the outline are ignored (for example, the
// `vertical serifs' found in many Hebrew glyph designs).
//
// The segment must be at least EM/25 font units long, and the distance
// to the extremum must be smaller than EM/4.
//
//
// cjk auto-hinter
// ---------------
//
// Characters in a blue string are *not* automatically classified. Instead,
// first come the characters used for the overshoot value, then the
// character `|', then the characters used for the reference value. The
// blue zone is then set up by the mean values of all reference values and
// all overshoot values, respectively. Both horizontal and vertical blue
// zones (i.e., adjusting vertical and horizontal coordinate values,
// respectively) are supported.
//
// For the cjk auto-hinter, the overshoot should be smaller than the
// reference for top zones, and vice versa for bottom zones.
//
// CJK_TOP
// Take the maximum flat and round coordinate values of the blue string
// characters. If not set, take the minimum values.
//
// CJK_RIGHT
// A synonym for CJK_TOP. If CJK_HORIZ is set, this flag indicates the
// right blue zone, taking horizontal maximum values.
//
// CJK_HORIZ
// Define a blue zone for horizontal hinting (i.e., vertical blue
// zones). If not set, this is a blue zone for vertical hinting.
AF_BLUE_STRINGSET_ENUM AF_BLUE_STRINGSETS_ARRAY AF_BLUE_STRINGSET_MAX_LEN:
AF_BLUE_STRINGSET_LATN
@ -195,22 +266,14 @@ AF_BLUE_STRINGSET_ENUM AF_BLUE_STRINGSETS_ARRAY AF_BLUE_STRINGSET_MAX_LEN:
#ifdef AF_CONFIG_OPTION_CJK
AF_BLUE_STRINGSET_HANI
{ AF_BLUE_STRING_CJK_TOP_FILL, AF_BLUE_PROPERTY_CJK_TOP |
AF_BLUE_PROPERTY_CJK_FILL }
{ AF_BLUE_STRING_CJK_TOP_UNFILL, AF_BLUE_PROPERTY_CJK_TOP }
{ AF_BLUE_STRING_CJK_BOTTOM_FILL, AF_BLUE_PROPERTY_CJK_FILL }
{ AF_BLUE_STRING_CJK_BOTTOM_UNFILL, 0 }
{ AF_BLUE_STRING_CJK_TOP, AF_BLUE_PROPERTY_CJK_TOP }
{ AF_BLUE_STRING_CJK_BOTTOM, 0 }
#ifdef AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT
{ AF_BLUE_STRING_CJK_LEFT_FILL, AF_BLUE_PROPERTY_CJK_HORIZ |
AF_BLUE_PROPERTY_CJK_FILL }
{ AF_BLUE_STRING_CJK_LEFT_UNFILL, AF_BLUE_PROPERTY_CJK_HORIZ }
{ AF_BLUE_STRING_CJK_RIGHT_FILL, AF_BLUE_PROPERTY_CJK_HORIZ |
AF_BLUE_PROPERTY_CJK_RIGHT |
AF_BLUE_PROPERTY_CJK_FILL }
{ AF_BLUE_STRING_CJK_RIGHT_UNFILL, AF_BLUE_PROPERTY_CJK_HORIZ |
AF_BLUE_PROPERTY_CJK_RIGHT }
{ AF_BLUE_STRING_CJK_LEFT, AF_BLUE_PROPERTY_CJK_HORIZ }
{ AF_BLUE_STRING_CJK_RIGHT, AF_BLUE_PROPERTY_CJK_HORIZ |
AF_BLUE_PROPERTY_CJK_RIGHT }
#endif /* AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT */
{ AF_BLUE_STRING_MAX, 0 }
{ AF_BLUE_STRING_MAX, 0 }
#endif /* AF_CONFIG_OPTION_CJK */

27
src/autofit/afblue.h
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@ -7,7 +7,7 @@
/* */
/* Auto-fitter data for blue strings (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, */
@ -67,7 +67,7 @@ FT_BEGIN_HEADER
/* At the bottommost level, we define strings for finding blue zones. */
#define AF_BLUE_STRING_MAX_LEN 25
#define AF_BLUE_STRING_MAX_LEN 51
/* The AF_Blue_String enumeration values are offsets into the */
/* `af_blue_strings' array. */
@ -93,16 +93,12 @@ FT_BEGIN_HEADER
AF_BLUE_STRING_HEBREW_DESCENDER = 203,
af_blue_1_1 = 213,
#ifdef AF_CONFIG_OPTION_CJK
AF_BLUE_STRING_CJK_TOP_FILL = af_blue_1_1 + 1,
AF_BLUE_STRING_CJK_TOP_UNFILL = af_blue_1_1 + 77,
AF_BLUE_STRING_CJK_BOTTOM_FILL = af_blue_1_1 + 153,
AF_BLUE_STRING_CJK_BOTTOM_UNFILL = af_blue_1_1 + 229,
AF_BLUE_STRING_CJK_TOP = af_blue_1_1 + 1,
AF_BLUE_STRING_CJK_BOTTOM = af_blue_1_1 + 153,
af_blue_1_1_1 = af_blue_1_1 + 304,
#ifdef AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT
AF_BLUE_STRING_CJK_LEFT_FILL = af_blue_1_1_1 + 1,
AF_BLUE_STRING_CJK_LEFT_UNFILL = af_blue_1_1_1 + 77,
AF_BLUE_STRING_CJK_RIGHT_FILL = af_blue_1_1_1 + 153,
AF_BLUE_STRING_CJK_RIGHT_UNFILL = af_blue_1_1_1 + 229,
AF_BLUE_STRING_CJK_LEFT = af_blue_1_1_1 + 1,
AF_BLUE_STRING_CJK_RIGHT = af_blue_1_1_1 + 153,
af_blue_1_1_2 = af_blue_1_1_1 + 304,
#else
af_blue_1_1_2 = af_blue_1_1_1 + 0,
@ -140,13 +136,12 @@ FT_BEGIN_HEADER
#define AF_BLUE_PROPERTY_LATIN_X_HEIGHT ( 1 << 1 )
#define AF_BLUE_PROPERTY_LATIN_LONG ( 1 << 2 )
#define AF_BLUE_PROPERTY_CJK_HORIZ ( 1 << 0 )
#define AF_BLUE_PROPERTY_CJK_TOP ( 1 << 1 )
#define AF_BLUE_PROPERTY_CJK_FILL ( 1 << 2 )
#define AF_BLUE_PROPERTY_CJK_TOP ( 1 << 0 )
#define AF_BLUE_PROPERTY_CJK_HORIZ ( 1 << 1 )
#define AF_BLUE_PROPERTY_CJK_RIGHT AF_BLUE_PROPERTY_CJK_TOP
#define AF_BLUE_STRINGSET_MAX_LEN 9
#define AF_BLUE_STRINGSET_MAX_LEN 7
/* The AF_Blue_Stringset enumeration values are offsets into the */
/* `af_blue_stringsets' array. */
@ -160,9 +155,9 @@ FT_BEGIN_HEADER
af_blue_2_1 = 24,
#ifdef AF_CONFIG_OPTION_CJK
AF_BLUE_STRINGSET_HANI = af_blue_2_1 + 0,
af_blue_2_1_1 = af_blue_2_1 + 4,
af_blue_2_1_1 = af_blue_2_1 + 2,
#ifdef AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT
af_blue_2_1_2 = af_blue_2_1_1 + 4,
af_blue_2_1_2 = af_blue_2_1_1 + 2,
#else
af_blue_2_1_2 = af_blue_2_1_1 + 0,
#endif /* AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT */

7
src/autofit/afblue.hin
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@ -4,7 +4,7 @@
/* */
/* Auto-fitter data for blue strings (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, */
@ -100,9 +100,8 @@ FT_BEGIN_HEADER
#define AF_BLUE_PROPERTY_LATIN_X_HEIGHT ( 1 << 1 )
#define AF_BLUE_PROPERTY_LATIN_LONG ( 1 << 2 )
#define AF_BLUE_PROPERTY_CJK_HORIZ ( 1 << 0 )
#define AF_BLUE_PROPERTY_CJK_TOP ( 1 << 1 )
#define AF_BLUE_PROPERTY_CJK_FILL ( 1 << 2 )
#define AF_BLUE_PROPERTY_CJK_TOP ( 1 << 0 )
#define AF_BLUE_PROPERTY_CJK_HORIZ ( 1 << 1 )
#define AF_BLUE_PROPERTY_CJK_RIGHT AF_BLUE_PROPERTY_CJK_TOP

76
src/autofit/afcjk.c
Unescape View File

@ -263,6 +263,8 @@
FT_Int num_fills;
FT_Int num_flats;
FT_Bool fill;
AF_CJKBlue blue;
FT_Error error;
AF_CJKAxis axis;
@ -273,22 +275,6 @@
AF_Blue_Stringset bss = sc->blue_stringset;
const AF_Blue_StringRec* bs = &af_blue_stringsets[bss];
#ifdef FT_DEBUG_LEVEL_TRACE
FT_String* cjk_blue_name[4] =
{
(FT_String*)"bottom", /* -- , -- */
(FT_String*)"top", /* -- , TOP */
(FT_String*)"left", /* HORIZ, -- */
(FT_String*)"right" /* HORIZ, TOP */
};
FT_String* cjk_blue_type_name[2] =
{
(FT_String*)"unfilled", /* -- */
(FT_String*)"filled" /* FILL */
};
#endif
/* we walk over the blue character strings as specified in the */
/* style's entry in the `af_blue_stringset' array, computing its */
@ -310,15 +296,29 @@
else
axis = &metrics->axis[AF_DIMENSION_VERT];
FT_TRACE5(( "blue zone %d:\n", axis->blue_count ));
#ifdef FT_DEBUG_LEVEL_TRACE
{
FT_String* cjk_blue_name[4] =
{
(FT_String*)"bottom", /* -- , -- */
(FT_String*)"top", /* -- , TOP */
(FT_String*)"left", /* HORIZ, -- */
(FT_String*)"right" /* HORIZ, TOP */
};
FT_TRACE5(( "blue zone %d (%s):\n",
axis->blue_count,
cjk_blue_name[AF_CJK_IS_HORIZ_BLUE( bs ) |
AF_CJK_IS_TOP_BLUE( bs ) ] ));
}
#endif /* FT_DEBUG_LEVEL_TRACE */
num_fills = 0;
num_flats = 0;
FT_TRACE5(( " cjk blue %s/%s\n",
cjk_blue_name[AF_CJK_IS_HORIZ_BLUE( bs ) |
AF_CJK_IS_TOP_BLUE( bs ) ],
cjk_blue_type_name[!!AF_CJK_IS_FILLED_BLUE( bs )] ));
fill = 1; /* start with characters that define fill values */
FT_TRACE5(( " [overshoot values]\n" ));
while ( *p )
{
@ -332,6 +332,14 @@
GET_UTF8_CHAR( ch, p );
/* switch to characters that define flat values */
if ( ch == '|' )
{
fill = 0;
FT_TRACE5(( " [reference values]\n" ));
continue;
}
/* load the character in the face -- skip unknown or empty ones */
af_get_char_index( &metrics->root, ch, &glyph_index, &y_offset );
if ( glyph_index == 0 )
@ -419,7 +427,7 @@
FT_TRACE5(( " U+%04lX: best_pos = %5ld\n", ch, best_pos ));
}
if ( AF_CJK_IS_FILLED_BLUE( bs ) )
if ( fill )
fills[num_fills++] = best_pos;
else
flats[num_flats++] = best_pos;
@ -431,15 +439,15 @@
* we couldn't find a single glyph to compute this blue zone,
* we will simply ignore it then
*/
FT_TRACE5(( " empty\n" ));
FT_TRACE5(( " empty\n" ));
continue;
}
/* we have computed the contents of the `fill' and `flats' tables, */
/* now determine the reference position of the blue zone -- */
/* we simply take the median value after a simple sort */
af_sort_pos( num_flats, flats );
/* we have computed the contents of the `fill' and `flats' tables, */
/* now determine the reference and overshoot position of the blue -- */
/* we simply take the median value after a simple sort */
af_sort_pos( num_fills, fills );
af_sort_pos( num_flats, flats );
blue = &axis->blues[axis->blue_count];
blue_ref = &blue->ref.org;
@ -478,7 +486,7 @@
*blue_ref =
*blue_shoot = ( shoot + ref ) / 2;
FT_TRACE5(( " [overshoot smaller than reference,"
FT_TRACE5(( " [reference smaller than overshoot,"
" taking mean value]\n" ));
}
}
@ -1232,8 +1240,10 @@
/* zone, check for left edges */
/* */
/* of course, that's for TrueType */
is_top_right_blue = FT_BOOL( blue->flags & AF_CJK_BLUE_TOP );
is_major_dir = FT_BOOL( edge->dir == axis->major_dir );
is_top_right_blue =
(FT_Byte)( ( blue->flags & AF_CJK_BLUE_TOP ) != 0 );
is_major_dir =
FT_BOOL( edge->dir == axis->major_dir );
/* if it is a top zone, the edge must be against the major */
/* direction; if it is a bottom zone, it must be in the major */
@ -1530,6 +1540,12 @@
stem_edge->pos = base_edge->pos + fitted_width;
FT_TRACE5(( " CJKLINK: edge %d @%d (opos=%.2f) linked to %.2f,"
" dist was %.2f, now %.2f\n",
stem_edge - hints->axis[dim].edges, stem_edge->fpos,
stem_edge->opos / 64.0, stem_edge->pos / 64.0,
dist / 64.0, fitted_width / 64.0 ));
}

4
src/autofit/afcjk.h
Unescape View File

@ -4,7 +4,7 @@
/* */
/* Auto-fitter hinting routines for CJK writing system (specification). */
/* */
/* Copyright 2006, 2007, 2011-2013 by */
/* Copyright 2006, 2007, 2011-2014 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@ -50,8 +50,6 @@ FT_BEGIN_HEADER
( (b)->properties & AF_BLUE_PROPERTY_CJK_TOP )
#define AF_CJK_IS_HORIZ_BLUE( b ) \
( (b)->properties & AF_BLUE_PROPERTY_CJK_HORIZ )
#define AF_CJK_IS_FILLED_BLUE( b ) \
( (b)->properties & AF_BLUE_PROPERTY_CJK_FILL )
#define AF_CJK_IS_RIGHT_BLUE AF_CJK_IS_TOP_BLUE
#define AF_CJK_MAX_WIDTHS 16

2
src/autofit/aflatin.c
Unescape View File

@ -2218,7 +2218,7 @@
FT_TRACE5(( " LINK: edge %d (opos=%.2f) linked to %.2f,"
" dist was %.2f, now %.2f\n",
stem_edge-hints->axis[dim].edges, stem_edge->opos / 64.0,
stem_edge - hints->axis[dim].edges, stem_edge->opos / 64.0,
stem_edge->pos / 64.0, dist / 64.0, fitted_width / 64.0 ));
}

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