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HarfBuzz: Update to version 4.0.0

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This commit is contained in:
bruvzg
2022-03-02 10:48:37 +02:00
parent b7a852a05d
commit 9b0fbfa06d
51 changed files with 2569 additions and 549 deletions
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301
thirdparty/harfbuzz/src/hb-ot-layout.cc vendored
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@@ -361,6 +361,13 @@ hb_ot_layout_get_attach_points (hb_face_t *face,
* Fetches a list of the caret positions defined for a ligature glyph in the GDEF
* table of the font. The list returned will begin at the offset provided.
*
* Note that a ligature that is formed from n characters will have n-1
* caret positions. The first character is not represented in the array,
* since its caret position is the glyph position.
*
* The positions returned by this function are 'unshaped', and will have to
* be fixed up for kerning that may be applied to the ligature glyph.
*
* Return value: Total number of ligature caret positions for @glyph.
*
**/
@@ -1959,6 +1966,77 @@ 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: 4.0.0
**/
hb_ot_layout_baseline_tag_t
hb_ot_layout_get_horizontal_baseline_tag_for_script (hb_script_t script)
{
/* Keep in sync with hb_ot_layout_get_baseline_with_fallback */
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
@@ -1966,7 +2044,7 @@ hb_ot_layout_substitute_lookup (OT::hb_ot_apply_context_t *c,
* @direction: text direction.
* @script_tag: script tag.
* @language_tag: language tag, currently unused.
* @coord: (out): baseline value if found.
* @coord: (out) (nullable): baseline value if found.
*
* Fetches a baseline value from the face.
*
@@ -1989,6 +2067,227 @@ hb_ot_layout_get_baseline (hb_font_t *font,
return result;
}
/**
* hb_ot_layout_get_baseline_with_fallback:
* @font: a font
* @baseline_tag: a baseline tag
* @direction: text direction.
* @script_tag: script tag.
* @language_tag: language tag, currently unused.
* @coord: (out): baseline value if found.
*
* Fetches a baseline value from the face, and synthesizes
* it if the font does not have it.
*
* Since: 4.0.0
**/
void
hb_ot_layout_get_baseline_with_fallback (hb_font_t *font,
hb_ot_layout_baseline_tag_t baseline_tag,
hb_direction_t direction,
hb_tag_t script_tag,
hb_tag_t language_tag,
hb_position_t *coord /* OUT */)
{
if (hb_ot_layout_get_baseline (font,
baseline_tag,
direction,
script_tag,
language_tag,
coord))
return;
/* Synthesize missing baselines.
* See https://www.w3.org/TR/css-inline-3/#baseline-synthesis-fonts
*/
switch (baseline_tag)
{
case HB_OT_LAYOUT_BASELINE_TAG_ROMAN:
*coord = 0; // FIXME origin ?
break;
case HB_OT_LAYOUT_BASELINE_TAG_MATH:
{
hb_codepoint_t glyph;
hb_glyph_extents_t extents;
if (HB_DIRECTION_IS_HORIZONTAL (direction) &&
(hb_font_get_nominal_glyph (font, 0x2212u, &glyph) ||
hb_font_get_nominal_glyph (font, '-', &glyph)) &&
hb_font_get_glyph_extents (font, glyph, &extents))
{
*coord = extents.y_bearing + extents.height / 2;
}
else
{
hb_position_t x_height = 0;
hb_ot_metrics_get_position (font, HB_OT_METRICS_TAG_X_HEIGHT, &x_height);
*coord = x_height / 2;
}
}
break;
case HB_OT_LAYOUT_BASELINE_TAG_IDEO_FACE_TOP_OR_RIGHT:
case HB_OT_LAYOUT_BASELINE_TAG_IDEO_FACE_BOTTOM_OR_LEFT:
{
hb_position_t embox_top, embox_bottom;
hb_ot_layout_get_baseline_with_fallback (font,
HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_TOP_OR_RIGHT,
direction,
script_tag,
language_tag,
&embox_top);
hb_ot_layout_get_baseline_with_fallback (font,
HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_BOTTOM_OR_LEFT,
direction,
script_tag,
language_tag,
&embox_bottom);
if (baseline_tag == HB_OT_LAYOUT_BASELINE_TAG_IDEO_FACE_TOP_OR_RIGHT)
*coord = embox_top + (embox_bottom - embox_top) / 10;
else
*coord = embox_bottom + (embox_top - embox_bottom) / 10;
}
break;
case HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_TOP_OR_RIGHT:
if (hb_ot_layout_get_baseline (font,
HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_BOTTOM_OR_LEFT,
direction,
script_tag,
language_tag,
coord))
*coord += HB_DIRECTION_IS_HORIZONTAL (direction) ? font->y_scale : font->x_scale;
else
{
hb_font_extents_t font_extents;
hb_font_get_extents_for_direction (font, direction, &font_extents);
*coord = font_extents.ascender;
}
break;
case HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_BOTTOM_OR_LEFT:
if (hb_ot_layout_get_baseline (font,
HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_TOP_OR_RIGHT,
direction,
script_tag,
language_tag,
coord))
*coord -= HB_DIRECTION_IS_HORIZONTAL (direction) ? font->y_scale : font->x_scale;
else
{
hb_font_extents_t font_extents;
hb_font_get_extents_for_direction (font, direction, &font_extents);
*coord = font_extents.descender;
}
break;
case HB_OT_LAYOUT_BASELINE_TAG_HANGING:
if (HB_DIRECTION_IS_HORIZONTAL (direction))
{
hb_codepoint_t ch;
hb_codepoint_t glyph;
hb_glyph_extents_t extents;
/* Keep in sync with hb_ot_layout_get_horizontal_baseline_for_script */
switch ((int) script_tag)
{
/* Unicode-1.1 additions */
case HB_SCRIPT_BENGALI: ch = 0x0995u; break;
case HB_SCRIPT_DEVANAGARI: ch = 0x0915u; break;
case HB_SCRIPT_GUJARATI: ch = 0x0a95u; break;
case HB_SCRIPT_GURMUKHI: ch = 0x0a15u; break;
/* Unicode-2.0 additions */
case HB_SCRIPT_TIBETAN: ch = 0x0f40u; break;
/* Unicode-4.0 additions */
case HB_SCRIPT_LIMBU: ch = 0x1901u; break;
/* Unicode-4.1 additions */
case HB_SCRIPT_SYLOTI_NAGRI: ch = 0xa807u; break;
/* Unicode-5.0 additions */
case HB_SCRIPT_PHAGS_PA: ch = 0xa840u; break;
/* Unicode-5.2 additions */
case HB_SCRIPT_MEETEI_MAYEK: ch = 0xabc0u; break;
/* Unicode-6.1 additions */
case HB_SCRIPT_SHARADA: ch = 0x11191u; break;
case HB_SCRIPT_TAKRI: ch = 0x1168cu; break;
/* Unicode-7.0 additions */
case HB_SCRIPT_MODI: ch = 0x1160eu;break;
case HB_SCRIPT_SIDDHAM: ch = 0x11590u; break;
case HB_SCRIPT_TIRHUTA: ch = 0x1148fu; break;
/* Unicode-9.0 additions */
case HB_SCRIPT_MARCHEN: ch = 0x11c72u; break;
case HB_SCRIPT_NEWA: ch = 0x1140eu; break;
/* Unicode-10.0 additions */
case HB_SCRIPT_SOYOMBO: ch = 0x11a5cu; break;
case HB_SCRIPT_ZANABAZAR_SQUARE: ch = 0x11a0bu; break;
/* Unicode-11.0 additions */
case HB_SCRIPT_DOGRA: ch = 0x1180au; break;
case HB_SCRIPT_GUNJALA_GONDI: ch = 0x11d6cu; break;
/* Unicode-12.0 additions */
case HB_SCRIPT_NANDINAGARI: ch = 0x119b0u; break;
default: ch = 0; break;
}
if (ch &&
hb_font_get_nominal_glyph (font, ch, &glyph) &&
hb_font_get_glyph_extents (font, glyph, &extents))
*coord = extents.y_bearing;
else
*coord = font->y_scale * 6 / 10; // FIXME makes assumptions about origin
}
else
*coord = font->x_scale * 6 / 10; // FIXME makes assumptions about origin
break;
case HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_CENTRAL:
{
hb_position_t top, bottom;
hb_ot_layout_get_baseline_with_fallback (font,
HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_TOP_OR_RIGHT,
direction,
script_tag,
language_tag,
&top);
hb_ot_layout_get_baseline_with_fallback (font,
HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_BOTTOM_OR_LEFT,
direction,
script_tag,
language_tag,
&bottom);
*coord = (top + bottom) / 2;
}
break;
case HB_OT_LAYOUT_BASELINE_TAG_IDEO_FACE_CENTRAL:
{
hb_position_t top, bottom;
hb_ot_layout_get_baseline_with_fallback (font,
HB_OT_LAYOUT_BASELINE_TAG_IDEO_FACE_TOP_OR_RIGHT,
direction,
script_tag,
language_tag,
&top);
hb_ot_layout_get_baseline_with_fallback (font,
HB_OT_LAYOUT_BASELINE_TAG_IDEO_FACE_BOTTOM_OR_LEFT,
direction,
script_tag,
language_tag,
&bottom);
*coord = (top + bottom) / 2;
}
break;
case _HB_OT_LAYOUT_BASELINE_TAG_MAX_VALUE:
default:
*coord = 0;
break;
}
}
#endif