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[kern] Switch to dispatch

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This commit is contained in:
Behdad Esfahbod 2018-11-06 12:11:45 -05:00
parent 213fa3bf71
commit bfafe208da
2 changed files with 21 additions and 22 deletions
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31
src/hb-ot-kern-table.hh
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@ -476,6 +476,7 @@ template <typename KernSubTableHeader>
struct KernSubTable
{
inline unsigned int get_size (void) const { return u.header.length; }
inline unsigned int get_type (void) const { return u.header.format; }
inline bool is_simple (void) const
{ return !(u.header.coverage & (u.header.CrossStream | u.header.Variation)); }
@ -488,21 +489,24 @@ struct KernSubTable
inline int get_kerning (hb_codepoint_t left, hb_codepoint_t right) const
{
switch (u.header.format) {
switch (get_type ()) {
/* This method hooks up to hb_font_t's get_h_kerning. Only support Format0. */
case 0: return u.format0.get_kerning (left, right);
default:return 0;
}
}
inline void apply (AAT::hb_aat_apply_context_t *c) const
template <typename context_t>
inline typename context_t::return_t dispatch (context_t *c) const
{
switch (u.header.format) {
case 0: u.format0.apply (c); return;
case 1: u.format1.apply (c); return;
case 2: u.format2.apply (c); return;
case 3: u.format3.apply (c); return;
default: return;
unsigned int subtable_type = get_type ();
TRACE_DISPATCH (this, subtable_type);
switch (subtable_type) {
case 0: return_trace (c->dispatch (u.format0));
case 1: return_trace (c->dispatch (u.format1));
case 2: return_trace (c->dispatch (u.format2));
case 3: return_trace (c->dispatch (u.format3));
default: return_trace (c->default_return_value ());
}
}
@ -512,13 +516,8 @@ struct KernSubTable
if (unlikely (!u.header.sanitize (c) ||
u.header.length < u.header.min_size ||
!c->check_range (this, u.header.length))) return_trace (false);
switch (u.header.format) {
case 0: return_trace (u.format0.sanitize (c));
case 1: return_trace (u.format1.sanitize (c));
case 2: return_trace (u.format2.sanitize (c));
case 3: return_trace (u.format3.sanitize (c));
default:return_trace (true);
}
return_trace (dispatch (c));
}
protected:
@ -591,7 +590,7 @@ struct KernTable
c->sanitizer.set_object (*st);
st->apply (c);
st->dispatch (c);
(void) c->buffer->message (c->font, "end kern subtable %d", c->lookup_index);