ref: adb08efcf1c661bbff0b71672a293f06c51e58a4
dir: /src/autofit/afblue.dat/
// afblue.dat
//
// Auto-fitter data for blue strings.
//
// Copyright 2013-2015 by
// David Turner, Robert Wilhelm, and Werner Lemberg.
//
// 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.
// This file contains data specific to blue zones. It gets processed by
// a script to simulate `jagged arrays', with enumeration values holding
// offsets into the arrays.
//
// The format of the file is rather simple: A section starts with three
// labels separated by whitespace and followed by a colon (everything in a
// single line); the first label gives the name of the enumeration template,
// the second the name of the array template, and the third the name of the
// `maximum' template, holding the size of the largest array element. The
// script then fills the corresponding templates (indicated by `@'
// characters around the name).
//
// A section contains one or more data records. Each data record consists
// of two or more lines. The first line holds the enumeration name, and the
// remaining lines the corresponding array data.
//
// There are two possible representations for array data.
//
// - A string of characters in UTF-8 encoding enclosed in double quotes,
// using C syntax. There can be only one string per line, thus the
// starting and ending double quote must be the first and last character
// in the line, respectively, ignoring whitespace before and after the
// string. Space characters within the string are ignored too. If there
// are multiple strings (in multiple lines), they are concatenated to a
// single string. In the output, a string gets represented as a series of
// singles bytes, followed by a zero byte. The enumeration values simply
// hold byte offsets to the start of the corresponding strings.
//
// - Data blocks enclosed in balanced braces, which get copied verbatim and
// which can span multiple lines. The opening brace of a block must be
// the first character of a line (ignoring whitespace), and the closing
// brace the last (ignoring whitespace also). The script appends a comma
// character after each block and counts the number of blocks to set the
// enumeration values.
//
// A section can contain either strings only or data blocks only.
//
// A comment line starts with `//'; it gets removed. A preprocessor
// directive line (using the standard syntax of `cpp') starts with `#' and
// gets copied verbatim to both the enumeration and the array. Whitespace
// outside of a string is insignificant.
//
// Preprocessor directives are ignored while the script computes maximum
// values; this essentially means that the maximum values can easily be too
// large. Given that the purpose of those values is to create local
// fixed-size arrays at compile time for further processing of the blue zone
// data, this isn't a problem. Note the the final zero byte of a string is
// not counted. Note also that the count holds the number of UTF-8 encoded
// 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_ARABIC_TOP
"ا إ ل ك ط ظ"
AF_BLUE_STRING_ARABIC_JOIN
"ت ث ط ظ ك"
AF_BLUE_STRING_CYRILLIC_CAPITAL_TOP
"БВЕПЗОСЭ"
AF_BLUE_STRING_CYRILLIC_CAPITAL_BOTTOM
"БВЕШЗОСЭ"
AF_BLUE_STRING_CYRILLIC_SMALL
"хпншезос"
AF_BLUE_STRING_CYRILLIC_SMALL_DESCENDER
"руф"
// we separate the letters with spaces to avoid ligatures;
// this is just for convenience to simplify reading
AF_BLUE_STRING_DEVANAGARI_BASE
"क म अ आ थ ध भ श"
AF_BLUE_STRING_DEVANAGARI_TOP
"ई ऐ ओ औ ि ी ो ौ"
// note that some fonts have extreme variation in the height of the
// round head elements; for this reason we also define the `base'
// blue zone, which must be always present
AF_BLUE_STRING_DEVANAGARI_HEAD
"क म अ आ थ ध भ श"
AF_BLUE_STRING_DEVANAGARI_BOTTOM
"ु ृ"
AF_BLUE_STRING_GREEK_CAPITAL_TOP
"ΓΒΕΖΘΟΩ"
AF_BLUE_STRING_GREEK_CAPITAL_BOTTOM
"ΒΔΖΞΘΟ"
AF_BLUE_STRING_GREEK_SMALL_BETA_TOP
"βθδζλξ"
AF_BLUE_STRING_GREEK_SMALL
"αειοπστω"
AF_BLUE_STRING_GREEK_SMALL_DESCENDER
"βγημρφχψ"
AF_BLUE_STRING_HEBREW_TOP
"בדהחךכםס"
AF_BLUE_STRING_HEBREW_BOTTOM
"בטכםסצ"
AF_BLUE_STRING_HEBREW_DESCENDER
"קךןףץ"
AF_BLUE_STRING_LATIN_CAPITAL_TOP
"THEZOCQS"
AF_BLUE_STRING_LATIN_CAPITAL_BOTTOM
"HEZLOCUS"
AF_BLUE_STRING_LATIN_SMALL_F_TOP
"fijkdbh"
AF_BLUE_STRING_LATIN_SMALL
"xzroesc"
AF_BLUE_STRING_LATIN_SMALL_DESCENDER
"pqgjy"
// we separate the letters with spaces to avoid ligatures;
// this is just for convenience to simplify reading
AF_BLUE_STRING_TELUGU_TOP
"ఇ ఌ ఙ ఞ ణ ఱ ౯"
AF_BLUE_STRING_TELUGU_BOTTOM
"అ క చ ర ఽ ౨ ౬"
AF_BLUE_STRING_THAI_TOP
"บ เ แ อ ก า"
AF_BLUE_STRING_THAI_BOTTOM
"บ ป ษ ฯ อ ย ฮ"
AF_BLUE_STRING_THAI_ASCENDER
"ป ฝ ฟ"
AF_BLUE_STRING_THAI_LARGE_ASCENDER
"โ ใ ไ"
AF_BLUE_STRING_THAI_DESCENDER
"ฎ ฏ ฤ ฦ"
AF_BLUE_STRING_THAI_LARGE_DESCENDER
"ญ ฐ"
AF_BLUE_STRING_THAI_DIGIT_TOP
"๐ ๑ ๓"
#ifdef AF_CONFIG_OPTION_CJK
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 |"
"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
"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 |"
"主些因它想意理生"
"當看着置者自著裡"
"过还进進過道還里"
"面"
#ifdef AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT
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 |"
"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
"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 |"
"例別别制动動吗嗎"
"增指明朝期构物确"
"种調调費费那都間"
"间"
#endif /* AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT */
#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.
//
// During the glyph analysis, edges are sorted from bottom to top, and then
// sequentially checked, edge by edge, against the blue zones in the order
// given below.
//
//
// 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 for computing the blue zone's reference and overshoot
// values.
//
// If not set, take the minimum values.
//
// LATIN_NEUTRAL
// Ignore round extrema and define the blue zone with flat values only.
// Both top and bottom of contours can match. This is useful for
// scripts like Devanagari where vowel signs attach to the base
// character and are implemented as components of composite glyphs.
//
// If not set, both round and flat extrema are taken into account.
// Additionally, only the top or the bottom of a contour can match,
// depending on the LATIN_TOP flag.
//
// Neutral blue zones should always follow non-neutral blue zones.
//
// 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_ARAB
{ AF_BLUE_STRING_ARABIC_TOP, AF_BLUE_PROPERTY_LATIN_TOP }
{ AF_BLUE_STRING_ARABIC_JOIN, 0 }
{ AF_BLUE_STRING_MAX, 0 }
AF_BLUE_STRINGSET_CYRL
{ AF_BLUE_STRING_CYRILLIC_CAPITAL_TOP, AF_BLUE_PROPERTY_LATIN_TOP }
{ AF_BLUE_STRING_CYRILLIC_CAPITAL_BOTTOM, 0 }
{ AF_BLUE_STRING_CYRILLIC_SMALL, AF_BLUE_PROPERTY_LATIN_TOP |
AF_BLUE_PROPERTY_LATIN_X_HEIGHT }
{ AF_BLUE_STRING_CYRILLIC_SMALL, 0 }
{ AF_BLUE_STRING_CYRILLIC_SMALL_DESCENDER, 0 }
{ AF_BLUE_STRING_MAX, 0 }
AF_BLUE_STRINGSET_DEVA
{ AF_BLUE_STRING_DEVANAGARI_TOP, AF_BLUE_PROPERTY_LATIN_TOP }
{ AF_BLUE_STRING_DEVANAGARI_HEAD, AF_BLUE_PROPERTY_LATIN_TOP }
{ AF_BLUE_STRING_DEVANAGARI_BASE, AF_BLUE_PROPERTY_LATIN_TOP |
AF_BLUE_PROPERTY_LATIN_NEUTRAL |
AF_BLUE_PROPERTY_LATIN_X_HEIGHT }
{ AF_BLUE_STRING_DEVANAGARI_BASE, 0 }
{ AF_BLUE_STRING_DEVANAGARI_BOTTOM, 0 }
{ AF_BLUE_STRING_MAX, 0 }
AF_BLUE_STRINGSET_GREK
{ AF_BLUE_STRING_GREEK_CAPITAL_TOP, AF_BLUE_PROPERTY_LATIN_TOP }
{ AF_BLUE_STRING_GREEK_CAPITAL_BOTTOM, 0 }
{ AF_BLUE_STRING_GREEK_SMALL_BETA_TOP, AF_BLUE_PROPERTY_LATIN_TOP }
{ AF_BLUE_STRING_GREEK_SMALL, AF_BLUE_PROPERTY_LATIN_TOP |
AF_BLUE_PROPERTY_LATIN_X_HEIGHT }
{ AF_BLUE_STRING_GREEK_SMALL, 0 }
{ AF_BLUE_STRING_GREEK_SMALL_DESCENDER, 0 }
{ AF_BLUE_STRING_MAX, 0 }
AF_BLUE_STRINGSET_HEBR
{ AF_BLUE_STRING_HEBREW_TOP, AF_BLUE_PROPERTY_LATIN_TOP |
AF_BLUE_PROPERTY_LATIN_LONG }
{ AF_BLUE_STRING_HEBREW_BOTTOM, 0 }
{ AF_BLUE_STRING_HEBREW_DESCENDER, 0 }
{ AF_BLUE_STRING_MAX, 0 }
AF_BLUE_STRINGSET_LATN
{ AF_BLUE_STRING_LATIN_CAPITAL_TOP, AF_BLUE_PROPERTY_LATIN_TOP }
{ AF_BLUE_STRING_LATIN_CAPITAL_BOTTOM, 0 }
{ AF_BLUE_STRING_LATIN_SMALL_F_TOP, AF_BLUE_PROPERTY_LATIN_TOP }
{ AF_BLUE_STRING_LATIN_SMALL, AF_BLUE_PROPERTY_LATIN_TOP |
AF_BLUE_PROPERTY_LATIN_X_HEIGHT }
{ AF_BLUE_STRING_LATIN_SMALL, 0 }
{ AF_BLUE_STRING_LATIN_SMALL_DESCENDER, 0 }
{ AF_BLUE_STRING_MAX, 0 }
AF_BLUE_STRINGSET_TELU
{ AF_BLUE_STRING_TELUGU_TOP, AF_BLUE_PROPERTY_LATIN_TOP }
{ AF_BLUE_STRING_TELUGU_BOTTOM, 0 }
{ AF_BLUE_STRING_MAX, 0 }
AF_BLUE_STRINGSET_THAI
{ AF_BLUE_STRING_THAI_TOP, AF_BLUE_PROPERTY_LATIN_TOP |
AF_BLUE_PROPERTY_LATIN_X_HEIGHT }
{ AF_BLUE_STRING_THAI_BOTTOM, 0 }
{ AF_BLUE_STRING_THAI_ASCENDER, AF_BLUE_PROPERTY_LATIN_TOP }
{ AF_BLUE_STRING_THAI_LARGE_ASCENDER, AF_BLUE_PROPERTY_LATIN_TOP }
{ AF_BLUE_STRING_THAI_DESCENDER, 0 }
{ AF_BLUE_STRING_THAI_LARGE_DESCENDER, 0 }
{ AF_BLUE_STRING_THAI_DIGIT_TOP, 0 }
{ AF_BLUE_STRING_MAX, 0 }
#ifdef AF_CONFIG_OPTION_CJK
AF_BLUE_STRINGSET_HANI
{ 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, 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 }
#endif /* AF_CONFIG_OPTION_CJK */
// END