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[cmap] Factor out find_best_subtable

This commit is contained in:
Behdad Esfahbod 2018-08-25 15:33:05 -07:00
parent b41c43b4e1
commit 02fe03e09a
1 changed files with 31 additions and 21 deletions
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52
src/hb-ot-cmap-table.hh
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@ -928,6 +928,35 @@ struct cmap
return result;
}
const CmapSubtable *find_best_subtable (bool *symbol = nullptr) const
{
if (symbol) *symbol = false;
const CmapSubtable *subtable;
/* 32-bit subtables. */
if ((subtable = this->find_subtable (3, 10))) return subtable;
if ((subtable = this->find_subtable (0, 6))) return subtable;
if ((subtable = this->find_subtable (0, 4))) return subtable;
/* 16-bit subtables. */
if ((subtable = this->find_subtable (3, 1))) return subtable;
if ((subtable = this->find_subtable (0, 3))) return subtable;
if ((subtable = this->find_subtable (0, 2))) return subtable;
if ((subtable = this->find_subtable (0, 1))) return subtable;
if ((subtable = this->find_subtable (0, 0))) return subtable;
/* Symbol subtable. */
if ((subtable = this->find_subtable (3, 0)))
{
if (symbol) *symbol = true;
return subtable;
}
/* Meh. */
return &Null(CmapSubtable);
}
struct accelerator_t
{
inline void init (hb_face_t *face)
@ -935,27 +964,8 @@ struct cmap
this->blob = hb_sanitize_context_t().reference_table<cmap> (face);
const cmap *table = this->blob->as<cmap> ();
const CmapSubtableFormat14 *subtable_uvs = nullptr;
subtable = nullptr;
bool symbol = false;
/* 32-bit subtables. */
if (!subtable) subtable = table->find_subtable (3, 10);
if (!subtable) subtable = table->find_subtable (0, 6);
if (!subtable) subtable = table->find_subtable (0, 4);
/* 16-bit subtables. */
if (!subtable) subtable = table->find_subtable (3, 1);
if (!subtable) subtable = table->find_subtable (0, 3);
if (!subtable) subtable = table->find_subtable (0, 2);
if (!subtable) subtable = table->find_subtable (0, 1);
if (!subtable) subtable = table->find_subtable (0, 0);
if (!subtable)
{
subtable = table->find_subtable (3, 0);
if (subtable) symbol = true;
}
/* Meh. */
if (!subtable) subtable = &Null(CmapSubtable);
bool symbol;
subtable = table->find_best_subtable (&symbol);
/* UVS subtable. */
if (!subtable_uvs)