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Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-default.cc')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-default.cc | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-default.cc b/src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-default.cc new file mode 100644 index 0000000000..d6afa0e1c1 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-default.cc @@ -0,0 +1,220 @@ +/* + * Copyright © 2010,2012 Google, Inc. + * + * This is part of HarfBuzz, a text shaping library. + * + * Permission is hereby granted, without written agreement and without + * license or royalty fees, to use, copy, modify, and distribute this + * software and its documentation for any purpose, provided that the + * above copyright notice and the following two paragraphs appear in + * all copies of this software. + * + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. + * + * Google Author(s): Behdad Esfahbod + */ + +#include "hb-ot-shape-complex-private.hh" + + +/* TODO Add kana, and other small shapers here */ + + +/* The default shaper *only* adds additional per-script features.*/ + +static const hb_tag_t hangul_features[] = +{ + HB_TAG('l','j','m','o'), + HB_TAG('v','j','m','o'), + HB_TAG('t','j','m','o'), + HB_TAG_NONE +}; + +static const hb_tag_t tibetan_features[] = +{ + HB_TAG('a','b','v','s'), + HB_TAG('b','l','w','s'), + HB_TAG('a','b','v','m'), + HB_TAG('b','l','w','m'), + HB_TAG_NONE +}; + +static void +collect_features_default (hb_ot_shape_planner_t *plan) +{ + const hb_tag_t *script_features = NULL; + + switch ((hb_tag_t) plan->props.script) + { + /* Unicode-1.1 additions */ + case HB_SCRIPT_HANGUL: + script_features = hangul_features; + break; + + /* Unicode-2.0 additions */ + case HB_SCRIPT_TIBETAN: + script_features = tibetan_features; + break; + } + + for (; script_features && *script_features; script_features++) + plan->map.add_global_bool_feature (*script_features); +} + +static hb_ot_shape_normalization_mode_t +normalization_preference_default (const hb_segment_properties_t *props) +{ + return HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS; +} + +static bool +compose_default (const hb_ot_shape_normalize_context_t *c, + hb_codepoint_t a, + hb_codepoint_t b, + hb_codepoint_t *ab) +{ + /* Hebrew presentation-form shaping. + * https://bugzilla.mozilla.org/show_bug.cgi?id=728866 + * Hebrew presentation forms with dagesh, for characters 0x05D0..0x05EA; + * Note that some letters do not have a dagesh presForm encoded. + */ + static const hb_codepoint_t sDageshForms[0x05EA - 0x05D0 + 1] = { + 0xFB30, /* ALEF */ + 0xFB31, /* BET */ + 0xFB32, /* GIMEL */ + 0xFB33, /* DALET */ + 0xFB34, /* HE */ + 0xFB35, /* VAV */ + 0xFB36, /* ZAYIN */ + 0x0000, /* HET */ + 0xFB38, /* TET */ + 0xFB39, /* YOD */ + 0xFB3A, /* FINAL KAF */ + 0xFB3B, /* KAF */ + 0xFB3C, /* LAMED */ + 0x0000, /* FINAL MEM */ + 0xFB3E, /* MEM */ + 0x0000, /* FINAL NUN */ + 0xFB40, /* NUN */ + 0xFB41, /* SAMEKH */ + 0x0000, /* AYIN */ + 0xFB43, /* FINAL PE */ + 0xFB44, /* PE */ + 0x0000, /* FINAL TSADI */ + 0xFB46, /* TSADI */ + 0xFB47, /* QOF */ + 0xFB48, /* RESH */ + 0xFB49, /* SHIN */ + 0xFB4A /* TAV */ + }; + + bool found = c->unicode->compose (a, b, ab); + + if (!found && (b & ~0x7F) == 0x0580) { + /* Special-case Hebrew presentation forms that are excluded from + * standard normalization, but wanted for old fonts. */ + switch (b) { + case 0x05B4: /* HIRIQ */ + if (a == 0x05D9) { /* YOD */ + *ab = 0xFB1D; + found = true; + } + break; + case 0x05B7: /* patah */ + if (a == 0x05F2) { /* YIDDISH YOD YOD */ + *ab = 0xFB1F; + found = true; + } else if (a == 0x05D0) { /* ALEF */ + *ab = 0xFB2E; + found = true; + } + break; + case 0x05B8: /* QAMATS */ + if (a == 0x05D0) { /* ALEF */ + *ab = 0xFB2F; + found = true; + } + break; + case 0x05B9: /* HOLAM */ + if (a == 0x05D5) { /* VAV */ + *ab = 0xFB4B; + found = true; + } + break; + case 0x05BC: /* DAGESH */ + if (a >= 0x05D0 && a <= 0x05EA) { + *ab = sDageshForms[a - 0x05D0]; + found = (*ab != 0); + } else if (a == 0xFB2A) { /* SHIN WITH SHIN DOT */ + *ab = 0xFB2C; + found = true; + } else if (a == 0xFB2B) { /* SHIN WITH SIN DOT */ + *ab = 0xFB2D; + found = true; + } + break; + case 0x05BF: /* RAFE */ + switch (a) { + case 0x05D1: /* BET */ + *ab = 0xFB4C; + found = true; + break; + case 0x05DB: /* KAF */ + *ab = 0xFB4D; + found = true; + break; + case 0x05E4: /* PE */ + *ab = 0xFB4E; + found = true; + break; + } + break; + case 0x05C1: /* SHIN DOT */ + if (a == 0x05E9) { /* SHIN */ + *ab = 0xFB2A; + found = true; + } else if (a == 0xFB49) { /* SHIN WITH DAGESH */ + *ab = 0xFB2C; + found = true; + } + break; + case 0x05C2: /* SIN DOT */ + if (a == 0x05E9) { /* SHIN */ + *ab = 0xFB2B; + found = true; + } else if (a == 0xFB49) { /* SHIN WITH DAGESH */ + *ab = 0xFB2D; + found = true; + } + break; + } + } + + return found; +} + +const hb_ot_complex_shaper_t _hb_ot_complex_shaper_default = +{ + "default", + collect_features_default, + NULL, /* override_features */ + NULL, /* data_create */ + NULL, /* data_destroy */ + NULL, /* preprocess_text */ + normalization_preference_default, + NULL, /* decompose */ + compose_default, + NULL, /* setup_masks */ + HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_UNICODE_LATE, + true, /* fallback_position */ +}; |