363 lines
10 KiB
C++
363 lines
10 KiB
C++
/*
|
|
* Copyright © 2010,2011,2012 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
|
|
*/
|
|
|
|
#ifndef HB_OT_SHAPE_COMPLEX_PRIVATE_HH
|
|
#define HB_OT_SHAPE_COMPLEX_PRIVATE_HH
|
|
|
|
#include "hb-private.hh"
|
|
|
|
#include "hb-ot-shape-private.hh"
|
|
#include "hb-ot-shape-normalize-private.hh"
|
|
|
|
|
|
|
|
/* buffer var allocations, used by complex shapers */
|
|
#define complex_var_u8_0() var2.u8[2]
|
|
#define complex_var_u8_1() var2.u8[3]
|
|
|
|
|
|
enum hb_ot_shape_zero_width_marks_type_t {
|
|
HB_OT_SHAPE_ZERO_WIDTH_MARKS_NONE,
|
|
// HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_UNICODE_EARLY,
|
|
HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_UNICODE_LATE,
|
|
HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_EARLY,
|
|
HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_LATE
|
|
};
|
|
|
|
|
|
/* Master OT shaper list */
|
|
#define HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS \
|
|
HB_COMPLEX_SHAPER_IMPLEMENT (default) /* should be first */ \
|
|
HB_COMPLEX_SHAPER_IMPLEMENT (arabic) \
|
|
HB_COMPLEX_SHAPER_IMPLEMENT (hangul) \
|
|
HB_COMPLEX_SHAPER_IMPLEMENT (hebrew) \
|
|
HB_COMPLEX_SHAPER_IMPLEMENT (myanmar_old) \
|
|
HB_COMPLEX_SHAPER_IMPLEMENT (indic) \
|
|
HB_COMPLEX_SHAPER_IMPLEMENT (myanmar) \
|
|
HB_COMPLEX_SHAPER_IMPLEMENT (thai) \
|
|
HB_COMPLEX_SHAPER_IMPLEMENT (tibetan) \
|
|
HB_COMPLEX_SHAPER_IMPLEMENT (use) \
|
|
/* ^--- Add new shapers here */
|
|
|
|
|
|
struct hb_ot_complex_shaper_t
|
|
{
|
|
char name[8];
|
|
|
|
/* collect_features()
|
|
* Called during shape_plan().
|
|
* Shapers should use plan->map to add their features and callbacks.
|
|
* May be NULL.
|
|
*/
|
|
void (*collect_features) (hb_ot_shape_planner_t *plan);
|
|
|
|
/* override_features()
|
|
* Called during shape_plan().
|
|
* Shapers should use plan->map to override features and add callbacks after
|
|
* common features are added.
|
|
* May be NULL.
|
|
*/
|
|
void (*override_features) (hb_ot_shape_planner_t *plan);
|
|
|
|
|
|
/* data_create()
|
|
* Called at the end of shape_plan().
|
|
* Whatever shapers return will be accessible through plan->data later.
|
|
* If NULL is returned, means a plan failure.
|
|
*/
|
|
void *(*data_create) (const hb_ot_shape_plan_t *plan);
|
|
|
|
/* data_destroy()
|
|
* Called when the shape_plan is being destroyed.
|
|
* plan->data is passed here for destruction.
|
|
* If NULL is returned, means a plan failure.
|
|
* May be NULL.
|
|
*/
|
|
void (*data_destroy) (void *data);
|
|
|
|
|
|
/* preprocess_text()
|
|
* Called during shape().
|
|
* Shapers can use to modify text before shaping starts.
|
|
* May be NULL.
|
|
*/
|
|
void (*preprocess_text) (const hb_ot_shape_plan_t *plan,
|
|
hb_buffer_t *buffer,
|
|
hb_font_t *font);
|
|
|
|
/* postprocess_glyphs()
|
|
* Called during shape().
|
|
* Shapers can use to modify glyphs after shaping ends.
|
|
* May be NULL.
|
|
*/
|
|
void (*postprocess_glyphs) (const hb_ot_shape_plan_t *plan,
|
|
hb_buffer_t *buffer,
|
|
hb_font_t *font);
|
|
|
|
|
|
hb_ot_shape_normalization_mode_t normalization_preference;
|
|
|
|
/* decompose()
|
|
* Called during shape()'s normalization.
|
|
* May be NULL.
|
|
*/
|
|
bool (*decompose) (const hb_ot_shape_normalize_context_t *c,
|
|
hb_codepoint_t ab,
|
|
hb_codepoint_t *a,
|
|
hb_codepoint_t *b);
|
|
|
|
/* compose()
|
|
* Called during shape()'s normalization.
|
|
* May be NULL.
|
|
*/
|
|
bool (*compose) (const hb_ot_shape_normalize_context_t *c,
|
|
hb_codepoint_t a,
|
|
hb_codepoint_t b,
|
|
hb_codepoint_t *ab);
|
|
|
|
/* setup_masks()
|
|
* Called during shape().
|
|
* Shapers should use map to get feature masks and set on buffer.
|
|
* Shapers may NOT modify characters.
|
|
* May be NULL.
|
|
*/
|
|
void (*setup_masks) (const hb_ot_shape_plan_t *plan,
|
|
hb_buffer_t *buffer,
|
|
hb_font_t *font);
|
|
|
|
hb_ot_shape_zero_width_marks_type_t zero_width_marks;
|
|
|
|
bool fallback_position;
|
|
};
|
|
|
|
#define HB_COMPLEX_SHAPER_IMPLEMENT(name) extern HB_INTERNAL const hb_ot_complex_shaper_t _hb_ot_complex_shaper_##name;
|
|
HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS
|
|
#undef HB_COMPLEX_SHAPER_IMPLEMENT
|
|
|
|
|
|
static inline const hb_ot_complex_shaper_t *
|
|
hb_ot_shape_complex_categorize (const hb_ot_shape_planner_t *planner)
|
|
{
|
|
switch ((hb_tag_t) planner->props.script)
|
|
{
|
|
default:
|
|
return &_hb_ot_complex_shaper_default;
|
|
|
|
|
|
/* Unicode-1.1 additions */
|
|
case HB_SCRIPT_ARABIC:
|
|
|
|
/* Unicode-3.0 additions */
|
|
case HB_SCRIPT_MONGOLIAN:
|
|
case HB_SCRIPT_SYRIAC:
|
|
|
|
/* Unicode-5.0 additions */
|
|
case HB_SCRIPT_NKO:
|
|
case HB_SCRIPT_PHAGS_PA:
|
|
|
|
/* Unicode-6.0 additions */
|
|
case HB_SCRIPT_MANDAIC:
|
|
|
|
/* Unicode-7.0 additions */
|
|
case HB_SCRIPT_MANICHAEAN:
|
|
case HB_SCRIPT_PSALTER_PAHLAVI:
|
|
|
|
/* For Arabic script, use the Arabic shaper even if no OT script tag was found.
|
|
* This is because we do fallback shaping for Arabic script (and not others).
|
|
* But note that Arabic shaping is applicable only to horizontal layout; for
|
|
* vertical text, just use the generic shaper instead. */
|
|
if ((planner->map.chosen_script[0] != HB_OT_TAG_DEFAULT_SCRIPT ||
|
|
planner->props.script == HB_SCRIPT_ARABIC) &&
|
|
HB_DIRECTION_IS_HORIZONTAL(planner->props.direction))
|
|
return &_hb_ot_complex_shaper_arabic;
|
|
else
|
|
return &_hb_ot_complex_shaper_default;
|
|
|
|
|
|
/* Unicode-1.1 additions */
|
|
case HB_SCRIPT_THAI:
|
|
case HB_SCRIPT_LAO:
|
|
|
|
return &_hb_ot_complex_shaper_thai;
|
|
|
|
|
|
/* Unicode-1.1 additions */
|
|
case HB_SCRIPT_HANGUL:
|
|
|
|
return &_hb_ot_complex_shaper_hangul;
|
|
|
|
|
|
/* Unicode-2.0 additions */
|
|
case HB_SCRIPT_TIBETAN:
|
|
|
|
return &_hb_ot_complex_shaper_tibetan;
|
|
|
|
|
|
/* Unicode-1.1 additions */
|
|
case HB_SCRIPT_HEBREW:
|
|
|
|
return &_hb_ot_complex_shaper_hebrew;
|
|
|
|
|
|
/* ^--- Add new shapers here */
|
|
|
|
#if 0
|
|
/* Unicode-4.1 additions */
|
|
case HB_SCRIPT_NEW_TAI_LUE:
|
|
#endif
|
|
|
|
/* Unicode-1.1 additions */
|
|
case HB_SCRIPT_BENGALI:
|
|
case HB_SCRIPT_DEVANAGARI:
|
|
case HB_SCRIPT_GUJARATI:
|
|
case HB_SCRIPT_GURMUKHI:
|
|
case HB_SCRIPT_KANNADA:
|
|
case HB_SCRIPT_MALAYALAM:
|
|
case HB_SCRIPT_ORIYA:
|
|
case HB_SCRIPT_TAMIL:
|
|
case HB_SCRIPT_TELUGU:
|
|
|
|
/* Unicode-3.0 additions */
|
|
case HB_SCRIPT_SINHALA:
|
|
|
|
/* Unicode-5.2 additions */
|
|
case HB_SCRIPT_JAVANESE:
|
|
|
|
/* If the designer designed the font for the 'DFLT' script,
|
|
* use the default shaper. Otherwise, use the specific shaper.
|
|
* Note that for some simple scripts, there may not be *any*
|
|
* GSUB/GPOS needed, so there may be no scripts found! */
|
|
if (planner->map.chosen_script[0] == HB_TAG ('D','F','L','T'))
|
|
return &_hb_ot_complex_shaper_default;
|
|
else
|
|
return &_hb_ot_complex_shaper_indic;
|
|
|
|
case HB_SCRIPT_KHMER:
|
|
/* A number of Khmer fonts in the wild don't have a 'pref' feature,
|
|
* and as such won't shape properly via the Indic shaper;
|
|
* however, they typically have 'liga' / 'clig' features that implement
|
|
* the necessary "reordering" by means of ligature substitutions.
|
|
* So we send such pref-less fonts through the generic shaper instead. */
|
|
if (planner->map.found_script[0] &&
|
|
hb_ot_layout_language_find_feature (planner->face, HB_OT_TAG_GSUB,
|
|
planner->map.script_index[0],
|
|
planner->map.language_index[0],
|
|
HB_TAG ('p','r','e','f'),
|
|
NULL))
|
|
return &_hb_ot_complex_shaper_indic;
|
|
else
|
|
return &_hb_ot_complex_shaper_default;
|
|
|
|
case HB_SCRIPT_MYANMAR:
|
|
if (planner->map.chosen_script[0] == HB_TAG ('m','y','m','2'))
|
|
return &_hb_ot_complex_shaper_myanmar;
|
|
else if (planner->map.chosen_script[0] == HB_TAG ('m','y','m','r'))
|
|
return &_hb_ot_complex_shaper_myanmar_old;
|
|
else
|
|
return &_hb_ot_complex_shaper_default;
|
|
|
|
|
|
/* Unicode-2.0 additions */
|
|
//case HB_SCRIPT_TIBETAN:
|
|
|
|
/* Unicode-3.0 additions */
|
|
//case HB_SCRIPT_MONGOLIAN:
|
|
//case HB_SCRIPT_SINHALA:
|
|
|
|
/* Unicode-3.2 additions */
|
|
case HB_SCRIPT_BUHID:
|
|
case HB_SCRIPT_HANUNOO:
|
|
case HB_SCRIPT_TAGALOG:
|
|
case HB_SCRIPT_TAGBANWA:
|
|
|
|
/* Unicode-4.0 additions */
|
|
case HB_SCRIPT_LIMBU:
|
|
case HB_SCRIPT_TAI_LE:
|
|
|
|
/* Unicode-4.1 additions */
|
|
case HB_SCRIPT_BUGINESE:
|
|
case HB_SCRIPT_KHAROSHTHI:
|
|
case HB_SCRIPT_SYLOTI_NAGRI:
|
|
case HB_SCRIPT_TIFINAGH:
|
|
|
|
/* Unicode-5.0 additions */
|
|
case HB_SCRIPT_BALINESE:
|
|
//case HB_SCRIPT_NKO:
|
|
//case HB_SCRIPT_PHAGS_PA:
|
|
|
|
/* Unicode-5.1 additions */
|
|
case HB_SCRIPT_CHAM:
|
|
case HB_SCRIPT_KAYAH_LI:
|
|
case HB_SCRIPT_LEPCHA:
|
|
case HB_SCRIPT_REJANG:
|
|
case HB_SCRIPT_SAURASHTRA:
|
|
case HB_SCRIPT_SUNDANESE:
|
|
|
|
/* Unicode-5.2 additions */
|
|
case HB_SCRIPT_EGYPTIAN_HIEROGLYPHS:
|
|
//case HB_SCRIPT_JAVANESE:
|
|
case HB_SCRIPT_KAITHI:
|
|
case HB_SCRIPT_MEETEI_MAYEK:
|
|
case HB_SCRIPT_TAI_THAM:
|
|
case HB_SCRIPT_TAI_VIET:
|
|
|
|
/* Unicode-6.0 additions */
|
|
case HB_SCRIPT_BATAK:
|
|
case HB_SCRIPT_BRAHMI:
|
|
//case HB_SCRIPT_MANDAIC:
|
|
|
|
/* Unicode-6.1 additions */
|
|
case HB_SCRIPT_CHAKMA:
|
|
case HB_SCRIPT_SHARADA:
|
|
case HB_SCRIPT_TAKRI:
|
|
|
|
/* Unicode-7.0 additions */
|
|
case HB_SCRIPT_DUPLOYAN:
|
|
case HB_SCRIPT_GRANTHA:
|
|
case HB_SCRIPT_KHOJKI:
|
|
case HB_SCRIPT_KHUDAWADI:
|
|
case HB_SCRIPT_MAHAJANI:
|
|
//case HB_SCRIPT_MANICHAEAN:
|
|
case HB_SCRIPT_MODI:
|
|
case HB_SCRIPT_PAHAWH_HMONG:
|
|
//case HB_SCRIPT_PSALTER_PAHLAVI:
|
|
case HB_SCRIPT_SIDDHAM:
|
|
case HB_SCRIPT_TIRHUTA:
|
|
|
|
/* If the designer designed the font for the 'DFLT' script,
|
|
* use the default shaper. Otherwise, use the specific shaper.
|
|
* Note that for some simple scripts, there may not be *any*
|
|
* GSUB/GPOS needed, so there may be no scripts found! */
|
|
if (planner->map.chosen_script[0] == HB_TAG ('D','F','L','T'))
|
|
return &_hb_ot_complex_shaper_default;
|
|
else
|
|
return &_hb_ot_complex_shaper_use;
|
|
}
|
|
}
|
|
|
|
|
|
#endif /* HB_OT_SHAPE_COMPLEX_PRIVATE_HH */
|