[kern/kerx] Share KernTable, renamed to KerxTable
This commit is contained in:
Behdad Esfahbod
parent
c038f5be6b
commit
14772da06f
@ -831,7 +831,7 @@ struct KerxSubTable
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return_trace (dispatch (c));
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}
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protected:
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public:
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union {
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KerxSubTableHeader header;
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KerxSubTableFormat0<KerxSubTableHeader> format0;
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@ -840,7 +840,7 @@ protected:
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KerxSubTableFormat4<KerxSubTableHeader> format4;
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KerxSubTableFormat6<KerxSubTableHeader> format6;
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} u;
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public:
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public:
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DEFINE_SIZE_MIN (12);
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};
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@ -849,33 +849,52 @@ public:
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* The 'kerx' Table
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*/
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struct kerx
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template <typename T>
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struct KerxTable
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{
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static const hb_tag_t tableTag = HB_AAT_TAG_kerx;
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static const uint16_t minVersion = 2;
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/* https://en.wikipedia.org/wiki/Curiously_recurring_template_pattern */
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inline const T* thiz (void) const { return static_cast<const T *> (this); }
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typedef KerxSubTableHeader SubTableHeader;
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typedef SubTableHeader::Types Types;
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typedef KerxSubTable SubTable;
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inline bool has_data (void) const { return version != 0; }
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inline void apply (hb_aat_apply_context_t *c) const
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inline int get_h_kerning (hb_codepoint_t left, hb_codepoint_t right) const
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{
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typedef typename T::SubTable SubTable;
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int v = 0;
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const SubTable *st = &thiz()->firstSubTable;
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unsigned int count = thiz()->tableCount;
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for (unsigned int i = 0; i < count; i++)
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{
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if ((st->u.header.coverage & (st->u.header.Variation | st->u.header.CrossStream)) ||
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!st->u.header.is_horizontal ())
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continue;
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v += st->get_kerning (left, right);
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st = &StructAfter<SubTable> (*st);
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}
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return v;
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}
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inline void apply (AAT::hb_aat_apply_context_t *c) const
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{
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typedef typename T::SubTable SubTable;
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c->set_lookup_index (0);
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const SubTable *st = &firstSubTable;
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unsigned int count = tableCount;
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const SubTable *st = &thiz()->firstSubTable;
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unsigned int count = thiz()->tableCount;
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for (unsigned int i = 0; i < count; i++)
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{
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bool reverse;
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if (!T::Types::extended && (st->u.header.coverage & st->u.header.Variation))
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goto skip;
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if (HB_DIRECTION_IS_HORIZONTAL (c->buffer->props.direction) != st->u.header.is_horizontal ())
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goto skip;
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reverse = bool (st->u.header.coverage & st->u.header.Backwards) !=
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reverse = T::Types::extended /* TODO remove after kern application is moved earlier. */ &&
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bool (st->u.header.coverage & st->u.header.Backwards) !=
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HB_DIRECTION_IS_BACKWARD (c->buffer->props.direction);
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if (!c->buffer->message (c->font, "start %c%c%c%c subtable %d", HB_UNTAG (tableTag), c->lookup_index))
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if (!c->buffer->message (c->font, "start %c%c%c%c subtable %d", HB_UNTAG (thiz()->tableTag), c->lookup_index))
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goto skip;
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if (reverse)
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@ -890,7 +909,7 @@ struct kerx
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if (reverse)
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c->buffer->reverse ();
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(void) c->buffer->message (c->font, "end %c%c%c%c subtable %d", HB_UNTAG (tableTag), c->lookup_index);
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(void) c->buffer->message (c->font, "end %c%c%c%c subtable %d", HB_UNTAG (thiz()->tableTag), c->lookup_index);
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skip:
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st = &StructAfter<SubTable> (*st);
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@ -901,22 +920,38 @@ struct kerx
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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if (unlikely (!version.sanitize (c) ||
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version < minVersion ||
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!tableCount.sanitize (c)))
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if (unlikely (!thiz()->version.sanitize (c) ||
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thiz()->version < T::minVersion ||
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!thiz()->tableCount.sanitize (c)))
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return_trace (false);
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const SubTable *st = &firstSubTable;
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unsigned int count = tableCount;
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typedef typename T::SubTable SubTable;
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const SubTable *st = &thiz()->firstSubTable;
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unsigned int count = thiz()->tableCount;
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for (unsigned int i = 0; i < count; i++)
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{
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if (!st->sanitize (c))
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if (unlikely (!st->sanitize (c)))
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return_trace (false);
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st = &StructAfter<SubTable> (*st);
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}
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return_trace (true);
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}
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};
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struct kerx : KerxTable<kerx>
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{
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friend struct KerxTable<kerx>;
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static const hb_tag_t tableTag = HB_AAT_TAG_kerx;
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static const uint16_t minVersion = 2;
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typedef KerxSubTableHeader SubTableHeader;
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typedef SubTableHeader::Types Types;
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typedef KerxSubTable SubTable;
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inline bool has_data (void) const { return version; }
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protected:
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HBUINT16 version; /* The version number of the extended kerning table
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@ -158,98 +158,6 @@ struct KernSubTable
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};
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template <typename T>
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struct KernTable
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{
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/* https://en.wikipedia.org/wiki/Curiously_recurring_template_pattern */
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inline const T* thiz (void) const { return static_cast<const T *> (this); }
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inline int get_h_kerning (hb_codepoint_t left, hb_codepoint_t right) const
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{
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typedef typename T::SubTable SubTable;
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int v = 0;
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const SubTable *st = &thiz()->firstSubTable;
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unsigned int count = thiz()->tableCount;
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for (unsigned int i = 0; i < count; i++)
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{
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if ((st->u.header.coverage & (st->u.header.Variation | st->u.header.CrossStream)) ||
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!st->u.header.is_horizontal ())
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continue;
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v += st->get_kerning (left, right);
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st = &StructAfter<SubTable> (*st);
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}
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return v;
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}
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inline void apply (AAT::hb_aat_apply_context_t *c) const
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{
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typedef typename T::SubTable SubTable;
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c->set_lookup_index (0);
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const SubTable *st = &thiz()->firstSubTable;
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unsigned int count = thiz()->tableCount;
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for (unsigned int i = 0; i < count; i++)
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{
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bool reverse;
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if (!T::Types::extended && (st->u.header.coverage & st->u.header.Variation))
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goto skip;
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if (HB_DIRECTION_IS_HORIZONTAL (c->buffer->props.direction) != st->u.header.is_horizontal ())
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goto skip;
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reverse = T::Types::extended /* TODO remove after kern application is moved earlier. */ &&
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bool (st->u.header.coverage & st->u.header.Backwards) !=
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HB_DIRECTION_IS_BACKWARD (c->buffer->props.direction);
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if (!c->buffer->message (c->font, "start %c%c%c%c subtable %d", HB_UNTAG (thiz()->tableTag), c->lookup_index))
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goto skip;
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if (reverse)
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c->buffer->reverse ();
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c->sanitizer.set_object (*st);
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/* XXX Reverse-kern is probably not working yet...
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* hb_kern_machine_t would need to know that it's reverse-kerning. */
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st->dispatch (c);
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if (reverse)
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c->buffer->reverse ();
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(void) c->buffer->message (c->font, "end %c%c%c%c subtable %d", HB_UNTAG (thiz()->tableTag), c->lookup_index);
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skip:
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st = &StructAfter<SubTable> (*st);
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c->set_lookup_index (c->lookup_index + 1);
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}
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}
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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if (unlikely (!thiz()->version.sanitize (c) ||
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thiz()->version < T::minVersion ||
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!thiz()->tableCount.sanitize (c)))
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return_trace (false);
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typedef typename T::SubTable SubTable;
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const SubTable *st = &thiz()->firstSubTable;
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unsigned int count = thiz()->tableCount;
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for (unsigned int i = 0; i < count; i++)
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{
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if (unlikely (!st->sanitize (c)))
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return_trace (false);
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st = &StructAfter<SubTable> (*st);
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}
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return_trace (true);
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}
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};
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struct KernOTSubTableHeader
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{
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static const bool apple = false;
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@ -285,9 +193,9 @@ struct KernOTSubTableHeader
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DEFINE_SIZE_STATIC (6);
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};
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struct KernOT : KernTable<KernOT>
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struct KernOT : AAT::KerxTable<KernOT>
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{
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friend struct KernTable<KernOT>;
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friend struct AAT::KerxTable<KernOT>;
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static const hb_tag_t tableTag = HB_OT_TAG_kern;
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static const uint16_t minVersion = 0;
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@ -340,9 +248,9 @@ struct KernAATSubTableHeader
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DEFINE_SIZE_STATIC (8);
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};
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struct KernAAT : KernTable<KernAAT>
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struct KernAAT : AAT::KerxTable<KernAAT>
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{
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friend struct KernTable<KernAAT>;
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friend struct AAT::KerxTable<KernAAT>;
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static const hb_tag_t tableTag = HB_OT_TAG_kern;
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static const uint32_t minVersion = 0x00010000u;
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@ -363,8 +271,7 @@ struct kern
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{
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static const hb_tag_t tableTag = HB_OT_TAG_kern;
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inline bool has_data (void) const
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{ return u.version32 != 0; }
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inline bool has_data (void) const { return u.version32; }
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inline int get_h_kerning (hb_codepoint_t left, hb_codepoint_t right) const
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{
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