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[subset] add closure_glyphs () method for MATH table

This commit is contained in:
Qunxin Liu 2021-09-19 20:41:43 -07:00 committed by Behdad Esfahbod
parent 3b2929e8a9
commit 1afc3874e0
1 changed files with 57 additions and 0 deletions
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57
src/hb-ot-math-table.hh
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@ -426,6 +426,9 @@ struct MathGlyphVariantRecord
return_trace (c->check_struct (this));
}
void closure_glyphs (hb_set_t *variant_glyphs) const
{ variant_glyphs->add (variantGlyph); }
protected:
HBGlyphID16 variantGlyph; /* Glyph ID for the variant. */
HBUINT16 advanceMeasurement; /* Advance width/height, in design units, of the
@ -474,6 +477,9 @@ struct MathGlyphPartRecord
(partFlags & PartFlags::Defined);
}
void closure_glyphs (hb_set_t *variant_glyphs) const
{ variant_glyphs->add (glyph); }
protected:
HBGlyphID16 glyph; /* Glyph ID for the part. */
HBUINT16 startConnectorLength;
@ -526,6 +532,12 @@ struct MathGlyphAssembly
return partRecords.len;
}
void closure_glyphs (hb_set_t *variant_glyphs) const
{
for (const auto& _ : partRecords.iter ())
_.closure_glyphs (variant_glyphs);
}
protected:
MathValueRecord
italicsCorrection;
@ -569,6 +581,14 @@ struct MathGlyphConstruction
return mathGlyphVariantRecord.len;
}
void closure_glyphs (hb_set_t *variant_glyphs) const
{
(this+glyphAssembly).closure_glyphs (variant_glyphs);
for (const auto& _ : mathGlyphVariantRecord.iter ())
_.closure_glyphs (variant_glyphs);
}
protected:
/* Offset to MathGlyphAssembly table for this shape - from the beginning of
MathGlyphConstruction table. May be NULL. */
@ -583,6 +603,33 @@ struct MathGlyphConstruction
struct MathVariants
{
void closure_glyphs (const hb_set_t *glyph_set,
hb_set_t *variant_glyphs) const
{
const hb_array_t<const Offset16To<MathGlyphConstruction>> glyph_construction_offsets = glyphConstruction.as_array (vertGlyphCount + horizGlyphCount);
if (vertGlyphCoverage)
{
const auto vert_offsets = glyph_construction_offsets.sub_array (0, vertGlyphCount);
+ hb_zip (this+vertGlyphCoverage, vert_offsets)
| hb_filter (glyph_set, hb_first)
| hb_map (hb_second)
| hb_map (hb_add (this))
| hb_apply ([=] (const MathGlyphConstruction &_) { _.closure_glyphs (variant_glyphs); })
;
}
if (horizGlyphCoverage)
{
const auto hori_offsets = glyph_construction_offsets.sub_array (vertGlyphCount, horizGlyphCount);
+ hb_zip (this+horizGlyphCoverage, hori_offsets)
| hb_filter (glyph_set, hb_first)
| hb_map (hb_second)
| hb_map (hb_add (this))
| hb_apply ([=] (const MathGlyphConstruction &_) { _.closure_glyphs (variant_glyphs); })
;
}
}
bool sanitize_offsets (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
@ -690,6 +737,16 @@ struct MATH
bool has_data () const { return version.to_int (); }
void closure_glyphs (hb_set_t *glyph_set) const
{
if (mathVariants)
{
hb_set_t variant_glyphs;
(this+mathVariants).closure_glyphs (glyph_set, &variant_glyphs);
hb_set_union (glyph_set, &variant_glyphs);
}
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);