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[layout] Document new API

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This commit is contained in:
Behdad Esfahbod 2023-05-19 11:42:20 -06:00
parent 0894813a38
commit 792ca22ca3
1 changed files with 36 additions and 3 deletions
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39
src/hb-ot-layout.cc
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@ -2057,6 +2057,21 @@ choose_base_tags (hb_script_t script,
*language_tag = language_count ? language_tags[language_count - 1] : HB_OT_TAG_DEFAULT_LANGUAGE;
}
/**
* hb_ot_layout_get_font_extents:
* @font: a font
* @direction: text direction.
* @script_tag: script tag.
* @language_tag: language tag.
* @extents: (out) (nullable): font extents if found.
*
* Fetches script/language-specific font extents. These values are
* looked up in the `BASE` table's `MinMax` records.
*
* Return value: `true` if found script/language-specific font extents.
*
* XSince: REPLACEME
**/
hb_bool_t
hb_ot_layout_get_font_extents (hb_font_t *font,
hb_direction_t direction,
@ -2068,15 +2083,33 @@ hb_ot_layout_get_font_extents (hb_font_t *font,
if (font->face->table.BASE->get_min_max (font, direction, script_tag, language_tag, HB_TAG_NONE,
&min, &max))
{
extents->ascender = max;
extents->descender = min;
extents->line_gap = 0;
if (extents)
{
extents->ascender = max;
extents->descender = min;
extents->line_gap = 0;
}
return true;
}
return false;
}
/**
* hb_ot_layout_get_font_extents2:
* @font: a font
* @direction: text direction.
* @script: script.
* @language: language.
* @extents: (out) (nullable): font extents if found.
*
* Fetches script/language-specific font extents. These values are
* looked up in the `BASE` table's `MinMax` records.
*
* Return value: `true` if found script/language-specific font extents.
*
* XSince: REPLACEME
**/
hb_bool_t
hb_ot_layout_get_font_extents2 (hb_font_t *font,
hb_direction_t direction,