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[ot-layout] Add +hb_ot_layout_get_horizontal_baseline_tag_for_script() 

New API:
+hb_ot_layout_get_horizontal_baseline_tag_for_script()
This commit is contained in:
Behdad Esfahbod 2022-02-13 18:15:32 -06:00
parent cfa8cd7fb0
commit 98079109e6
3 changed files with 74 additions and 0 deletions
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1
docs/harfbuzz-sections.txt
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@ -535,6 +535,7 @@ hb_ot_layout_feature_get_lookups
hb_ot_layout_feature_get_name_ids
hb_ot_layout_feature_with_variations_get_lookups
hb_ot_layout_get_attach_points
hb_ot_layout_get_horizontal_baseline_tag_for_script
hb_ot_layout_get_baseline
hb_ot_layout_get_glyph_class
hb_ot_layout_get_glyphs_in_class

70
src/hb-ot-layout.cc
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@ -1966,6 +1966,76 @@ hb_ot_layout_substitute_lookup (OT::hb_ot_apply_context_t *c,
}
#ifndef HB_NO_BASE
/**
* hb_ot_layout_get_horizontal_baseline_tag_for_script:
* @script: a script tag.
*
* Fetches the dominant horizontal baseline tag used by @script.
*
* Return value: dominant baseline tag for the @script.
*
* Since: REPLACEME
**/
hb_ot_layout_baseline_tag_t
hb_ot_layout_get_horizontal_baseline_tag_for_script (hb_script_t script)
{
switch ((int) script)
{
/* Unicode-1.1 additions */
case HB_SCRIPT_BENGALI:
case HB_SCRIPT_DEVANAGARI:
case HB_SCRIPT_GUJARATI:
case HB_SCRIPT_GURMUKHI:
/* Unicode-2.0 additions */
case HB_SCRIPT_TIBETAN:
/* Unicode-4.0 additions */
case HB_SCRIPT_LIMBU:
/* Unicode-4.1 additions */
case HB_SCRIPT_SYLOTI_NAGRI:
/* Unicode-5.0 additions */
case HB_SCRIPT_PHAGS_PA:
/* Unicode-5.2 additions */
case HB_SCRIPT_MEETEI_MAYEK:
/* Unicode-6.1 additions */
case HB_SCRIPT_SHARADA:
case HB_SCRIPT_TAKRI:
/* Unicode-7.0 additions */
case HB_SCRIPT_MODI:
case HB_SCRIPT_SIDDHAM:
case HB_SCRIPT_TIRHUTA:
/* Unicode-9.0 additions */
case HB_SCRIPT_MARCHEN:
case HB_SCRIPT_NEWA:
/* Unicode-10.0 additions */
case HB_SCRIPT_SOYOMBO:
case HB_SCRIPT_ZANABAZAR_SQUARE:
/* Unicode-11.0 additions */
case HB_SCRIPT_DOGRA:
case HB_SCRIPT_GUNJALA_GONDI:
/* Unicode-12.0 additions */
case HB_SCRIPT_NANDINAGARI:
return HB_OT_LAYOUT_BASELINE_TAG_HANGING;
/* Unicode-1.1 additions */
case HB_SCRIPT_HANGUL:
case HB_SCRIPT_HAN:
case HB_SCRIPT_HIRAGANA:
case HB_SCRIPT_KATAKANA:
/* Unicode-3.0 additions */
case HB_SCRIPT_BOPOMOFO:
/* Unicode-9.0 additions */
case HB_SCRIPT_TANGUT:
/* Unicode-10.0 additions */
case HB_SCRIPT_NUSHU:
/* Unicode-13.0 additions */
case HB_SCRIPT_KHITAN_SMALL_SCRIPT:
return HB_OT_LAYOUT_BASELINE_TAG_IDEO_FACE_BOTTOM_OR_LEFT;
default:
return HB_OT_LAYOUT_BASELINE_TAG_ROMAN;
}
}
/**
* hb_ot_layout_get_baseline:
* @font: a font

3
src/hb-ot-layout.h
View File

@ -511,6 +511,9 @@ typedef enum {
_HB_OT_LAYOUT_BASELINE_TAG_MAX_VALUE = HB_TAG_MAX_SIGNED /*< skip >*/
} hb_ot_layout_baseline_tag_t;
HB_EXTERN hb_ot_layout_baseline_tag_t
hb_ot_layout_get_horizontal_baseline_tag_for_script (hb_script_t script);
HB_EXTERN hb_bool_t
hb_ot_layout_get_baseline (hb_font_t *font,
hb_ot_layout_baseline_tag_t baseline_tag,