[OTLayout] Implement Context::collect_glyphs()
This commit is contained in:
Behdad Esfahbod
parent
26514d51b6
commit
d0a5233785
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@ -477,17 +477,23 @@ struct hb_apply_context_t
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typedef bool (*intersects_func_t) (hb_set_t *glyphs, const USHORT &value, const void *data);
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typedef void (*collect_glyphs_func_t) (hb_set_t *glyphs, const USHORT &value, const void *data);
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typedef bool (*match_func_t) (hb_codepoint_t glyph_id, const USHORT &value, const void *data);
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struct ContextClosureFuncs
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{
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intersects_func_t intersects;
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};
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struct ContextCollectGlyphsFuncs
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{
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collect_glyphs_func_t collect;
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};
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struct ContextApplyFuncs
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{
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match_func_t match;
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};
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static inline bool intersects_glyph (hb_set_t *glyphs, const USHORT &value, const void *data HB_UNUSED)
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{
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return glyphs->has (value);
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@ -516,6 +522,31 @@ static inline bool intersects_array (hb_closure_context_t *c,
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}
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static inline void collect_glyph (hb_set_t *glyphs, const USHORT &value, const void *data HB_UNUSED)
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{
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glyphs->add (value);
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}
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static inline void collect_class (hb_set_t *glyphs, const USHORT &value, const void *data)
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{
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const ClassDef &class_def = *reinterpret_cast<const ClassDef *>(data);
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class_def.add_class (glyphs, value);
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}
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static inline void collect_coverage (hb_set_t *glyphs, const USHORT &value, const void *data)
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{
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const OffsetTo<Coverage> &coverage = (const OffsetTo<Coverage>&)value;
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(data+coverage).add_coverage (glyphs);
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}
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static inline void collect_array (hb_collect_glyphs_context_t *c,
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unsigned int count,
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const USHORT values[],
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collect_glyphs_func_t collect_func,
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const void *collect_data)
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{
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for (unsigned int i = 0; i < count; i++)
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collect_func (&c->input, values[i], collect_data);
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}
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static inline bool match_glyph (hb_codepoint_t glyph_id, const USHORT &value, const void *data HB_UNUSED)
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{
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return glyph_id == value;
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@ -531,7 +562,6 @@ static inline bool match_coverage (hb_codepoint_t glyph_id, const USHORT &value,
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return (data+coverage).get_coverage (glyph_id) != NOT_COVERED;
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}
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static inline bool would_match_input (hb_would_apply_context_t *c,
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unsigned int count, /* Including the first glyph (not matched) */
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const USHORT input[], /* Array of input values--start with second glyph */
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@ -774,9 +804,10 @@ struct LookupRecord
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};
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static inline void closure_lookup (hb_closure_context_t *c,
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unsigned int lookupCount,
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const LookupRecord lookupRecord[] /* Array of LookupRecords--in design order */)
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template <typename context_t>
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static inline void recurse_lookups (context_t *c,
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unsigned int lookupCount,
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const LookupRecord lookupRecord[] /* Array of LookupRecords--in design order */)
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{
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for (unsigned int i = 0; i < lookupCount; i++)
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c->recurse (lookupRecord->lookupListIndex);
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@ -851,6 +882,12 @@ struct ContextClosureLookupContext
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const void *intersects_data;
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};
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struct ContextCollectGlyphsLookupContext
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{
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ContextCollectGlyphsFuncs funcs;
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const void *collect_data;
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};
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struct ContextApplyLookupContext
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{
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ContextApplyFuncs funcs;
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@ -867,10 +904,23 @@ static inline void context_closure_lookup (hb_closure_context_t *c,
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if (intersects_array (c,
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inputCount ? inputCount - 1 : 0, input,
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lookup_context.funcs.intersects, lookup_context.intersects_data))
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closure_lookup (c,
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lookupCount, lookupRecord);
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recurse_lookups (c,
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lookupCount, lookupRecord);
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}
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static inline void context_collect_glyphs_lookup (hb_collect_glyphs_context_t *c,
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unsigned int inputCount, /* Including the first glyph (not matched) */
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const USHORT input[], /* Array of input values--start with second glyph */
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unsigned int lookupCount,
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const LookupRecord lookupRecord[],
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ContextCollectGlyphsLookupContext &lookup_context)
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{
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collect_array (c,
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inputCount ? inputCount - 1 : 0, input,
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lookup_context.funcs.collect, lookup_context.collect_data);
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recurse_lookups (c,
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lookupCount, lookupRecord);
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}
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static inline bool context_would_apply_lookup (hb_would_apply_context_t *c,
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unsigned int inputCount, /* Including the first glyph (not matched) */
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@ -910,6 +960,16 @@ struct Rule
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lookup_context);
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}
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inline void collect_glyphs (hb_collect_glyphs_context_t *c, ContextCollectGlyphsLookupContext &lookup_context) const
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{
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TRACE_COLLECT_GLYPHS (this);
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const LookupRecord *lookupRecord = &StructAtOffset<LookupRecord> (input, input[0].static_size * (inputCount ? inputCount - 1 : 0));
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context_collect_glyphs_lookup (c,
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inputCount, input,
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lookupCount, lookupRecord,
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lookup_context);
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}
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inline bool would_apply (hb_would_apply_context_t *c, ContextApplyLookupContext &lookup_context) const
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{
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TRACE_WOULD_APPLY (this);
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@ -957,6 +1017,14 @@ struct RuleSet
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(this+rule[i]).closure (c, lookup_context);
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}
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inline void collect_glyphs (hb_collect_glyphs_context_t *c, ContextCollectGlyphsLookupContext &lookup_context) const
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{
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TRACE_COLLECT_GLYPHS (this);
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unsigned int num_rules = rule.len;
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for (unsigned int i = 0; i < num_rules; i++)
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(this+rule[i]).collect_glyphs (c, lookup_context);
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}
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inline bool would_apply (hb_would_apply_context_t *c, ContextApplyLookupContext &lookup_context) const
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{
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TRACE_WOULD_APPLY (this);
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@ -1018,7 +1086,17 @@ struct ContextFormat1
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inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
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{
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/* XXXXXXXXXX */
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TRACE_COLLECT_GLYPHS (this);
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(this+coverage).add_coverage (&c->input);
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struct ContextCollectGlyphsLookupContext lookup_context = {
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{collect_glyph},
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NULL
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};
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unsigned int count = ruleSet.len;
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for (unsigned int i = 0; i < count; i++)
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(this+ruleSet[i]).collect_glyphs (c, lookup_context);
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}
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inline bool would_apply (hb_would_apply_context_t *c) const
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@ -1096,7 +1174,17 @@ struct ContextFormat2
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inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
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{
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/* XXXXXXXXXX */
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TRACE_COLLECT_GLYPHS (this);
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(this+coverage).add_coverage (&c->input);
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struct ContextCollectGlyphsLookupContext lookup_context = {
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{collect_class},
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NULL
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};
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unsigned int count = ruleSet.len;
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for (unsigned int i = 0; i < count; i++)
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(this+ruleSet[i]).collect_glyphs (c, lookup_context);
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}
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inline bool would_apply (hb_would_apply_context_t *c) const
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@ -1176,7 +1264,19 @@ struct ContextFormat3
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inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
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{
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/* XXXXXXXXXX */
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TRACE_COLLECT_GLYPHS (this);
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(this+coverage[0]).add_coverage (&c->input);
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const LookupRecord *lookupRecord = &StructAtOffset<LookupRecord> (coverage, coverage[0].static_size * glyphCount);
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struct ContextCollectGlyphsLookupContext lookup_context = {
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{collect_coverage},
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NULL
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};
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context_collect_glyphs_lookup (c,
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glyphCount, (const USHORT *) (coverage + 1),
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lookupCount, lookupRecord,
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lookup_context);
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}
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inline bool would_apply (hb_would_apply_context_t *c) const
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@ -1304,8 +1404,8 @@ static inline void chain_context_closure_lookup (hb_closure_context_t *c,
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&& intersects_array (c,
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lookaheadCount, lookahead,
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lookup_context.funcs.intersects, lookup_context.intersects_data[2]))
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closure_lookup (c,
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lookupCount, lookupRecord);
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recurse_lookups (c,
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lookupCount, lookupRecord);
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}
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static inline bool chain_context_would_apply_lookup (hb_would_apply_context_t *c,
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