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[GVAR] Implement table

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Unused. It's just like `gvar` but with 24bit glyphCount.
This commit is contained in:
Behdad Esfahbod 2024-12-09 21:52:39 -07:00
parent 4d3642c188
commit 894fee6db3
1 changed files with 15 additions and 7 deletions
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22
src/hb-ot-var-gvar-table.hh
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@ -36,6 +36,7 @@
* https://docs.microsoft.com/en-us/typography/opentype/spec/gvar
*/
#define HB_OT_TAG_gvar HB_TAG('g','v','a','r')
#define HB_OT_TAG_GVAR HB_TAG('G','V','A','R')
struct hb_glyf_scratch_t
{
@ -316,9 +317,10 @@ struct glyph_variations_t
}
};
struct gvar
template <typename GidOffsetType, unsigned TableTag>
struct gvar_GVAR
{
static constexpr hb_tag_t tableTag = HB_OT_TAG_gvar;
static constexpr hb_tag_t tableTag = TableTag;
bool sanitize_shallow (hb_sanitize_context_t *c) const
{
@ -371,7 +373,7 @@ struct gvar
bool force_long_offsets) const
{
TRACE_SERIALIZE (this);
gvar *out = c->allocate_min<gvar> ();
gvar_GVAR *out = c->allocate_min<gvar_GVAR> ();
if (unlikely (!out)) return_trace (false);
out->version.major = 1;
@ -443,7 +445,7 @@ struct gvar
unsigned glyph_count = version.to_int () ? c->plan->source->get_num_glyphs () : 0;
gvar *out = c->serializer->allocate_min<gvar> ();
gvar_GVAR *out = c->serializer->allocate_min<gvar_GVAR> ();
if (unlikely (!out)) return_trace (false);
out->version.major = 1;
@ -579,7 +581,7 @@ struct gvar
{
accelerator_t (hb_face_t *face)
{
table = hb_sanitize_context_t ().reference_table<gvar> (face);
table = hb_sanitize_context_t ().reference_table<gvar_GVAR> (face);
/* If sanitize failed, set glyphCount to 0. */
glyphCount = table->version.to_int () ? face->get_num_glyphs () : 0;
@ -875,7 +877,7 @@ struct gvar
unsigned int get_axis_count () const { return table->axisCount; }
private:
hb_blob_ptr_t<gvar> table;
hb_blob_ptr_t<gvar_GVAR> table;
unsigned glyphCount;
hb_vector_t<hb_pair_t<int, int>> shared_tuple_active_idx;
};
@ -893,7 +895,7 @@ struct gvar
NNOffset32To<UnsizedArrayOf<F2DOT14>>
sharedTuples; /* Offset from the start of this table to the shared tuple records.
* Array of tuple records shared across all glyph variation data tables. */
HBUINT16 glyphCountX; /* The number of glyphs in this font. This must match the number of
GidOffsetType glyphCountX; /* The number of glyphs in this font. This must match the number of
* glyphs stored elsewhere in the font. */
HBUINT16 flags; /* Bit-field that gives the format of the offset array that follows.
* If bit 0 is clear, the offsets are uint16; if bit 0 is set, the
@ -908,9 +910,15 @@ struct gvar
DEFINE_SIZE_ARRAY (20, offsetZ);
};
using gvar = gvar_GVAR<HBUINT16, HB_OT_TAG_gvar>;
using GVAR = gvar_GVAR<HBUINT24, HB_OT_TAG_GVAR>;
struct gvar_accelerator_t : gvar::accelerator_t {
gvar_accelerator_t (hb_face_t *face) : gvar::accelerator_t (face) {}
};
struct GVAR_accelerator_t : GVAR::accelerator_t {
GVAR_accelerator_t (hb_face_t *face) : GVAR::accelerator_t (face) {}
};
} /* namespace OT */