/*
* Copyright © 2007,2008,2009,2010 Red Hat, Inc.
- * Copyright © 2010,2012 Google, Inc.
+ * Copyright © 2010,2012,2013 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
{
TRACE_CLOSURE (this);
Coverage::Iter iter;
- for (iter.init (this+coverage); iter.more (); iter.next ()) {
+ for (iter.init (this+coverage); iter.more (); iter.next ())
+ {
+ /* TODO Switch to range-based API to work around malicious fonts.
+ * https://github.com/harfbuzz/harfbuzz/issues/363 */
hb_codepoint_t glyph_id = iter.get_glyph ();
if (c->glyphs->has (glyph_id))
- c->glyphs->add ((glyph_id + deltaGlyphID) & 0xFFFF);
+ c->glyphs->add ((glyph_id + deltaGlyphID) & 0xFFFFu);
}
}
inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
{
TRACE_COLLECT_GLYPHS (this);
+ if (unlikely (!(this+coverage).add_coverage (c->input))) return;
Coverage::Iter iter;
- for (iter.init (this+coverage); iter.more (); iter.next ()) {
+ for (iter.init (this+coverage); iter.more (); iter.next ())
+ {
+ /* TODO Switch to range-based API to work around malicious fonts.
+ * https://github.com/harfbuzz/harfbuzz/issues/363 */
hb_codepoint_t glyph_id = iter.get_glyph ();
- c->input->add (glyph_id);
- c->output->add ((glyph_id + deltaGlyphID) & 0xFFFF);
+ c->output->add ((glyph_id + deltaGlyphID) & 0xFFFFu);
}
}
inline bool would_apply (hb_would_apply_context_t *c) const
{
TRACE_WOULD_APPLY (this);
- return TRACE_RETURN (c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED);
+ return_trace (c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED);
}
- inline bool apply (hb_apply_context_t *c) const
+ inline bool apply (hb_ot_apply_context_t *c) const
{
TRACE_APPLY (this);
hb_codepoint_t glyph_id = c->buffer->cur().codepoint;
unsigned int index = (this+coverage).get_coverage (glyph_id);
- if (likely (index == NOT_COVERED)) return TRACE_RETURN (false);
+ if (likely (index == NOT_COVERED)) return_trace (false);
/* According to the Adobe Annotated OpenType Suite, result is always
* limited to 16bit. */
- glyph_id = (glyph_id + deltaGlyphID) & 0xFFFF;
+ glyph_id = (glyph_id + deltaGlyphID) & 0xFFFFu;
c->replace_glyph (glyph_id);
- return TRACE_RETURN (true);
+ return_trace (true);
}
inline bool serialize (hb_serialize_context_t *c,
int delta)
{
TRACE_SERIALIZE (this);
- if (unlikely (!c->extend_min (*this))) return TRACE_RETURN (false);
- if (unlikely (!coverage.serialize (c, this).serialize (c, glyphs, num_glyphs))) return TRACE_RETURN (false);
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
+ if (unlikely (!coverage.serialize (c, this).serialize (c, glyphs, num_glyphs))) return_trace (false);
deltaGlyphID.set (delta); /* TODO(serilaize) overflow? */
- return TRACE_RETURN (true);
+ return_trace (true);
}
- inline bool sanitize (hb_sanitize_context_t *c) {
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
TRACE_SANITIZE (this);
- return TRACE_RETURN (coverage.sanitize (c, this) && deltaGlyphID.sanitize (c));
+ return_trace (coverage.sanitize (c, this) && deltaGlyphID.sanitize (c));
}
protected:
- USHORT format; /* Format identifier--format = 1 */
+ HBUINT16 format; /* Format identifier--format = 1 */
OffsetTo<Coverage>
coverage; /* Offset to Coverage table--from
* beginning of Substitution table */
- SHORT deltaGlyphID; /* Add to original GlyphID to get
+ HBINT16 deltaGlyphID; /* Add to original GlyphID to get
* substitute GlyphID */
public:
DEFINE_SIZE_STATIC (6);
{
TRACE_CLOSURE (this);
Coverage::Iter iter;
- for (iter.init (this+coverage); iter.more (); iter.next ()) {
+ unsigned int count = substitute.len;
+ for (iter.init (this+coverage); iter.more (); iter.next ())
+ {
+ if (unlikely (iter.get_coverage () >= count))
+ break; /* Work around malicious fonts. https://github.com/harfbuzz/harfbuzz/issues/363 */
if (c->glyphs->has (iter.get_glyph ()))
c->glyphs->add (substitute[iter.get_coverage ()]);
}
inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
{
TRACE_COLLECT_GLYPHS (this);
+ if (unlikely (!(this+coverage).add_coverage (c->input))) return;
Coverage::Iter iter;
- for (iter.init (this+coverage); iter.more (); iter.next ()) {
- c->input->add (iter.get_glyph ());
+ unsigned int count = substitute.len;
+ for (iter.init (this+coverage); iter.more (); iter.next ())
+ {
+ if (unlikely (iter.get_coverage () >= count))
+ break; /* Work around malicious fonts. https://github.com/harfbuzz/harfbuzz/issues/363 */
c->output->add (substitute[iter.get_coverage ()]);
}
}
inline bool would_apply (hb_would_apply_context_t *c) const
{
TRACE_WOULD_APPLY (this);
- return TRACE_RETURN (c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED);
+ return_trace (c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED);
}
- inline bool apply (hb_apply_context_t *c) const
+ inline bool apply (hb_ot_apply_context_t *c) const
{
TRACE_APPLY (this);
hb_codepoint_t glyph_id = c->buffer->cur().codepoint;
unsigned int index = (this+coverage).get_coverage (glyph_id);
- if (likely (index == NOT_COVERED)) return TRACE_RETURN (false);
+ if (likely (index == NOT_COVERED)) return_trace (false);
- if (unlikely (index >= substitute.len)) return TRACE_RETURN (false);
+ if (unlikely (index >= substitute.len)) return_trace (false);
glyph_id = substitute[index];
c->replace_glyph (glyph_id);
- return TRACE_RETURN (true);
+ return_trace (true);
}
inline bool serialize (hb_serialize_context_t *c,
unsigned int num_glyphs)
{
TRACE_SERIALIZE (this);
- if (unlikely (!c->extend_min (*this))) return TRACE_RETURN (false);
- if (unlikely (!substitute.serialize (c, substitutes, num_glyphs))) return TRACE_RETURN (false);
- if (unlikely (!coverage.serialize (c, this).serialize (c, glyphs, num_glyphs))) return TRACE_RETURN (false);
- return TRACE_RETURN (true);
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
+ if (unlikely (!substitute.serialize (c, substitutes, num_glyphs))) return_trace (false);
+ if (unlikely (!coverage.serialize (c, this).serialize (c, glyphs, num_glyphs))) return_trace (false);
+ return_trace (true);
}
- inline bool sanitize (hb_sanitize_context_t *c) {
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
TRACE_SANITIZE (this);
- return TRACE_RETURN (coverage.sanitize (c, this) && substitute.sanitize (c));
+ return_trace (coverage.sanitize (c, this) && substitute.sanitize (c));
}
protected:
- USHORT format; /* Format identifier--format = 2 */
+ HBUINT16 format; /* Format identifier--format = 2 */
OffsetTo<Coverage>
coverage; /* Offset to Coverage table--from
* beginning of Substitution table */
struct SingleSubst
{
- template <typename context_t>
- inline typename context_t::return_t process (context_t *c) const
- {
- TRACE_PROCESS (this);
- switch (u.format) {
- case 1: return TRACE_RETURN (c->process (u.format1));
- case 2: return TRACE_RETURN (c->process (u.format2));
- default:return TRACE_RETURN (c->default_return_value ());
- }
- }
-
inline bool serialize (hb_serialize_context_t *c,
Supplier<GlyphID> &glyphs,
Supplier<GlyphID> &substitutes,
unsigned int num_glyphs)
{
TRACE_SERIALIZE (this);
- if (unlikely (!c->extend_min (u.format))) return TRACE_RETURN (false);
+ if (unlikely (!c->extend_min (u.format))) return_trace (false);
unsigned int format = 2;
- int delta;
+ int delta = 0;
if (num_glyphs) {
format = 1;
/* TODO(serialize) check for wrap-around */
}
u.format.set (format);
switch (u.format) {
- case 1: return TRACE_RETURN (u.format1.serialize (c, glyphs, num_glyphs, delta));
- case 2: return TRACE_RETURN (u.format2.serialize (c, glyphs, substitutes, num_glyphs));
- default:return TRACE_RETURN (false);
+ case 1: return_trace (u.format1.serialize (c, glyphs, num_glyphs, delta));
+ case 2: return_trace (u.format2.serialize (c, glyphs, substitutes, num_glyphs));
+ default:return_trace (false);
}
}
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- if (!u.format.sanitize (c)) return TRACE_RETURN (false);
+ template <typename context_t>
+ inline typename context_t::return_t dispatch (context_t *c) const
+ {
+ TRACE_DISPATCH (this, u.format);
+ if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ());
switch (u.format) {
- case 1: return TRACE_RETURN (u.format1.sanitize (c));
- case 2: return TRACE_RETURN (u.format2.sanitize (c));
- default:return TRACE_RETURN (true);
+ case 1: return_trace (c->dispatch (u.format1));
+ case 2: return_trace (c->dispatch (u.format2));
+ default:return_trace (c->default_return_value ());
}
}
protected:
union {
- USHORT format; /* Format identifier */
+ HBUINT16 format; /* Format identifier */
SingleSubstFormat1 format1;
SingleSubstFormat2 format2;
} u;
inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
{
TRACE_COLLECT_GLYPHS (this);
- unsigned int count = substitute.len;
- for (unsigned int i = 0; i < count; i++)
- c->output->add (substitute[i]);
+ c->output->add_array (substitute.array, substitute.len);
}
- inline bool apply (hb_apply_context_t *c) const
+ inline bool apply (hb_ot_apply_context_t *c) const
{
TRACE_APPLY (this);
- if (unlikely (!substitute.len)) return TRACE_RETURN (false);
-
- unsigned int klass = c->property & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE ? HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH : 0;
unsigned int count = substitute.len;
+
+ /* Special-case to make it in-place and not consider this
+ * as a "multiplied" substitution. */
+ if (unlikely (count == 1))
+ {
+ c->replace_glyph (substitute.array[0]);
+ return_trace (true);
+ }
+ /* Spec disallows this, but Uniscribe allows it.
+ * https://github.com/harfbuzz/harfbuzz/issues/253 */
+ else if (unlikely (count == 0))
+ {
+ c->buffer->delete_glyph ();
+ return_trace (true);
+ }
+
+ unsigned int klass = _hb_glyph_info_is_ligature (&c->buffer->cur()) ?
+ HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH : 0;
+
for (unsigned int i = 0; i < count; i++) {
- set_lig_props_for_component (c->buffer->cur(), i);
- c->output_glyph (substitute.array[i], klass);
+ _hb_glyph_info_set_lig_props_for_component (&c->buffer->cur(), i);
+ c->output_glyph_for_component (substitute.array[i], klass);
}
c->buffer->skip_glyph ();
- return TRACE_RETURN (true);
+ return_trace (true);
}
inline bool serialize (hb_serialize_context_t *c,
unsigned int num_glyphs)
{
TRACE_SERIALIZE (this);
- if (unlikely (!c->extend_min (*this))) return TRACE_RETURN (false);
- if (unlikely (!substitute.serialize (c, glyphs, num_glyphs))) return TRACE_RETURN (false);
- return TRACE_RETURN (true);
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
+ if (unlikely (!substitute.serialize (c, glyphs, num_glyphs))) return_trace (false);
+ return_trace (true);
}
- inline bool sanitize (hb_sanitize_context_t *c) {
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
TRACE_SANITIZE (this);
- return TRACE_RETURN (substitute.sanitize (c));
+ return_trace (substitute.sanitize (c));
}
protected:
{
TRACE_CLOSURE (this);
Coverage::Iter iter;
- for (iter.init (this+coverage); iter.more (); iter.next ()) {
+ unsigned int count = sequence.len;
+ for (iter.init (this+coverage); iter.more (); iter.next ())
+ {
+ if (unlikely (iter.get_coverage () >= count))
+ break; /* Work around malicious fonts. https://github.com/harfbuzz/harfbuzz/issues/363 */
if (c->glyphs->has (iter.get_glyph ()))
(this+sequence[iter.get_coverage ()]).closure (c);
}
inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
{
TRACE_COLLECT_GLYPHS (this);
- (this+coverage).add_coverage (c->input);
+ if (unlikely (!(this+coverage).add_coverage (c->input))) return;
unsigned int count = sequence.len;
for (unsigned int i = 0; i < count; i++)
(this+sequence[i]).collect_glyphs (c);
inline bool would_apply (hb_would_apply_context_t *c) const
{
TRACE_WOULD_APPLY (this);
- return TRACE_RETURN (c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED);
+ return_trace (c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED);
}
- inline bool apply (hb_apply_context_t *c) const
+ inline bool apply (hb_ot_apply_context_t *c) const
{
TRACE_APPLY (this);
unsigned int index = (this+coverage).get_coverage (c->buffer->cur().codepoint);
- if (likely (index == NOT_COVERED)) return TRACE_RETURN (false);
+ if (likely (index == NOT_COVERED)) return_trace (false);
- return TRACE_RETURN ((this+sequence[index]).apply (c));
+ return_trace ((this+sequence[index]).apply (c));
}
inline bool serialize (hb_serialize_context_t *c,
Supplier<GlyphID> &substitute_glyphs_list)
{
TRACE_SERIALIZE (this);
- if (unlikely (!c->extend_min (*this))) return TRACE_RETURN (false);
- if (unlikely (!sequence.serialize (c, num_glyphs))) return TRACE_RETURN (false);
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
+ if (unlikely (!sequence.serialize (c, num_glyphs))) return_trace (false);
for (unsigned int i = 0; i < num_glyphs; i++)
if (unlikely (!sequence[i].serialize (c, this).serialize (c,
substitute_glyphs_list,
- substitute_len_list[i]))) return TRACE_RETURN (false);
- substitute_len_list.advance (num_glyphs);
- if (unlikely (!coverage.serialize (c, this).serialize (c, glyphs, num_glyphs))) return TRACE_RETURN (false);
- return TRACE_RETURN (true);
+ substitute_len_list[i]))) return_trace (false);
+ substitute_len_list += num_glyphs;
+ if (unlikely (!coverage.serialize (c, this).serialize (c, glyphs, num_glyphs))) return_trace (false);
+ return_trace (true);
}
- inline bool sanitize (hb_sanitize_context_t *c) {
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
TRACE_SANITIZE (this);
- return TRACE_RETURN (coverage.sanitize (c, this) && sequence.sanitize (c, this));
+ return_trace (coverage.sanitize (c, this) && sequence.sanitize (c, this));
}
protected:
- USHORT format; /* Format identifier--format = 1 */
+ HBUINT16 format; /* Format identifier--format = 1 */
OffsetTo<Coverage>
coverage; /* Offset to Coverage table--from
* beginning of Substitution table */
struct MultipleSubst
{
- template <typename context_t>
- inline typename context_t::return_t process (context_t *c) const
- {
- TRACE_PROCESS (this);
- switch (u.format) {
- case 1: return TRACE_RETURN (c->process (u.format1));
- default:return TRACE_RETURN (c->default_return_value ());
- }
- }
-
inline bool serialize (hb_serialize_context_t *c,
Supplier<GlyphID> &glyphs,
Supplier<unsigned int> &substitute_len_list,
Supplier<GlyphID> &substitute_glyphs_list)
{
TRACE_SERIALIZE (this);
- if (unlikely (!c->extend_min (u.format))) return TRACE_RETURN (false);
+ if (unlikely (!c->extend_min (u.format))) return_trace (false);
unsigned int format = 1;
u.format.set (format);
switch (u.format) {
- case 1: return TRACE_RETURN (u.format1.serialize (c, glyphs, substitute_len_list, num_glyphs, substitute_glyphs_list));
- default:return TRACE_RETURN (false);
+ case 1: return_trace (u.format1.serialize (c, glyphs, substitute_len_list, num_glyphs, substitute_glyphs_list));
+ default:return_trace (false);
}
}
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- if (!u.format.sanitize (c)) return TRACE_RETURN (false);
+ template <typename context_t>
+ inline typename context_t::return_t dispatch (context_t *c) const
+ {
+ TRACE_DISPATCH (this, u.format);
+ if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ());
switch (u.format) {
- case 1: return TRACE_RETURN (u.format1.sanitize (c));
- default:return TRACE_RETURN (true);
+ case 1: return_trace (c->dispatch (u.format1));
+ default:return_trace (c->default_return_value ());
}
}
protected:
union {
- USHORT format; /* Format identifier */
+ HBUINT16 format; /* Format identifier */
MultipleSubstFormat1 format1;
} u;
};
{
TRACE_CLOSURE (this);
Coverage::Iter iter;
- for (iter.init (this+coverage); iter.more (); iter.next ()) {
+ unsigned int count = alternateSet.len;
+ for (iter.init (this+coverage); iter.more (); iter.next ())
+ {
+ if (unlikely (iter.get_coverage () >= count))
+ break; /* Work around malicious fonts. https://github.com/harfbuzz/harfbuzz/issues/363 */
if (c->glyphs->has (iter.get_glyph ())) {
const AlternateSet &alt_set = this+alternateSet[iter.get_coverage ()];
unsigned int count = alt_set.len;
inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
{
TRACE_COLLECT_GLYPHS (this);
+ if (unlikely (!(this+coverage).add_coverage (c->input))) return;
Coverage::Iter iter;
- for (iter.init (this+coverage); iter.more (); iter.next ()) {
- c->input->add (iter.get_glyph ());
+ unsigned int count = alternateSet.len;
+ for (iter.init (this+coverage); iter.more (); iter.next ())
+ {
+ if (unlikely (iter.get_coverage () >= count))
+ break; /* Work around malicious fonts. https://github.com/harfbuzz/harfbuzz/issues/363 */
const AlternateSet &alt_set = this+alternateSet[iter.get_coverage ()];
- unsigned int count = alt_set.len;
- for (unsigned int i = 0; i < count; i++)
- c->output->add (alt_set[i]);
+ c->output->add_array (alt_set.array, alt_set.len);
}
}
inline bool would_apply (hb_would_apply_context_t *c) const
{
TRACE_WOULD_APPLY (this);
- return TRACE_RETURN (c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED);
+ return_trace (c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED);
}
- inline bool apply (hb_apply_context_t *c) const
+ inline bool apply (hb_ot_apply_context_t *c) const
{
TRACE_APPLY (this);
hb_codepoint_t glyph_id = c->buffer->cur().codepoint;
unsigned int index = (this+coverage).get_coverage (glyph_id);
- if (likely (index == NOT_COVERED)) return TRACE_RETURN (false);
+ if (likely (index == NOT_COVERED)) return_trace (false);
const AlternateSet &alt_set = this+alternateSet[index];
- if (unlikely (!alt_set.len)) return TRACE_RETURN (false);
+ if (unlikely (!alt_set.len)) return_trace (false);
hb_mask_t glyph_mask = c->buffer->cur().mask;
hb_mask_t lookup_mask = c->lookup_mask;
unsigned int shift = _hb_ctz (lookup_mask);
unsigned int alt_index = ((lookup_mask & glyph_mask) >> shift);
- if (unlikely (alt_index > alt_set.len || alt_index == 0)) return TRACE_RETURN (false);
+ if (unlikely (alt_index > alt_set.len || alt_index == 0)) return_trace (false);
glyph_id = alt_set[alt_index - 1];
c->replace_glyph (glyph_id);
- return TRACE_RETURN (true);
+ return_trace (true);
}
inline bool serialize (hb_serialize_context_t *c,
Supplier<GlyphID> &alternate_glyphs_list)
{
TRACE_SERIALIZE (this);
- if (unlikely (!c->extend_min (*this))) return TRACE_RETURN (false);
- if (unlikely (!alternateSet.serialize (c, num_glyphs))) return TRACE_RETURN (false);
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
+ if (unlikely (!alternateSet.serialize (c, num_glyphs))) return_trace (false);
for (unsigned int i = 0; i < num_glyphs; i++)
if (unlikely (!alternateSet[i].serialize (c, this).serialize (c,
alternate_glyphs_list,
- alternate_len_list[i]))) return TRACE_RETURN (false);
- alternate_len_list.advance (num_glyphs);
- if (unlikely (!coverage.serialize (c, this).serialize (c, glyphs, num_glyphs))) return TRACE_RETURN (false);
- return TRACE_RETURN (true);
+ alternate_len_list[i]))) return_trace (false);
+ alternate_len_list += num_glyphs;
+ if (unlikely (!coverage.serialize (c, this).serialize (c, glyphs, num_glyphs))) return_trace (false);
+ return_trace (true);
}
- inline bool sanitize (hb_sanitize_context_t *c) {
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
TRACE_SANITIZE (this);
- return TRACE_RETURN (coverage.sanitize (c, this) && alternateSet.sanitize (c, this));
+ return_trace (coverage.sanitize (c, this) && alternateSet.sanitize (c, this));
}
protected:
- USHORT format; /* Format identifier--format = 1 */
+ HBUINT16 format; /* Format identifier--format = 1 */
OffsetTo<Coverage>
coverage; /* Offset to Coverage table--from
* beginning of Substitution table */
struct AlternateSubst
{
- template <typename context_t>
- inline typename context_t::return_t process (context_t *c) const
- {
- TRACE_PROCESS (this);
- switch (u.format) {
- case 1: return TRACE_RETURN (c->process (u.format1));
- default:return TRACE_RETURN (c->default_return_value ());
- }
- }
-
inline bool serialize (hb_serialize_context_t *c,
Supplier<GlyphID> &glyphs,
Supplier<unsigned int> &alternate_len_list,
Supplier<GlyphID> &alternate_glyphs_list)
{
TRACE_SERIALIZE (this);
- if (unlikely (!c->extend_min (u.format))) return TRACE_RETURN (false);
+ if (unlikely (!c->extend_min (u.format))) return_trace (false);
unsigned int format = 1;
u.format.set (format);
switch (u.format) {
- case 1: return TRACE_RETURN (u.format1.serialize (c, glyphs, alternate_len_list, num_glyphs, alternate_glyphs_list));
- default:return TRACE_RETURN (false);
+ case 1: return_trace (u.format1.serialize (c, glyphs, alternate_len_list, num_glyphs, alternate_glyphs_list));
+ default:return_trace (false);
}
}
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- if (!u.format.sanitize (c)) return TRACE_RETURN (false);
+ template <typename context_t>
+ inline typename context_t::return_t dispatch (context_t *c) const
+ {
+ TRACE_DISPATCH (this, u.format);
+ if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ());
switch (u.format) {
- case 1: return TRACE_RETURN (u.format1.sanitize (c));
- default:return TRACE_RETURN (true);
+ case 1: return_trace (c->dispatch (u.format1));
+ default:return_trace (c->default_return_value ());
}
}
protected:
union {
- USHORT format; /* Format identifier */
+ HBUINT16 format; /* Format identifier */
AlternateSubstFormat1 format1;
} u;
};
inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
{
TRACE_COLLECT_GLYPHS (this);
- unsigned int count = component.len;
- for (unsigned int i = 1; i < count; i++)
- c->input->add (component[i]);
+ c->input->add_array (component.array, component.len ? component.len - 1 : 0);
c->output->add (ligGlyph);
}
{
TRACE_WOULD_APPLY (this);
if (c->len != component.len)
- return TRACE_RETURN (false);
+ return_trace (false);
for (unsigned int i = 1; i < c->len; i++)
if (likely (c->glyphs[i] != component[i]))
- return TRACE_RETURN (false);
+ return_trace (false);
- return TRACE_RETURN (true);
+ return_trace (true);
}
- inline bool apply (hb_apply_context_t *c) const
+ inline bool apply (hb_ot_apply_context_t *c) const
{
TRACE_APPLY (this);
unsigned int count = component.len;
- if (unlikely (count < 1)) return TRACE_RETURN (false);
- unsigned int end_offset = 0;
+ if (unlikely (!count)) return_trace (false);
+
+ /* Special-case to make it in-place and not consider this
+ * as a "ligated" substitution. */
+ if (unlikely (count == 1))
+ {
+ c->replace_glyph (ligGlyph);
+ return_trace (true);
+ }
+
bool is_mark_ligature = false;
unsigned int total_component_count = 0;
+ unsigned int match_length = 0;
+ unsigned int match_positions[HB_MAX_CONTEXT_LENGTH];
+
if (likely (!match_input (c, count,
&component[1],
match_glyph,
- NULL,
- &end_offset,
+ nullptr,
+ &match_length,
+ match_positions,
&is_mark_ligature,
&total_component_count)))
- return TRACE_RETURN (false);
-
- /* Deal, we are forming the ligature. */
- c->buffer->merge_clusters (c->buffer->idx, c->buffer->idx + end_offset);
+ return_trace (false);
ligate_input (c,
count,
- &component[1],
+ match_positions,
+ match_length,
ligGlyph,
- match_glyph,
- NULL,
is_mark_ligature,
total_component_count);
- return TRACE_RETURN (true);
+ return_trace (true);
}
inline bool serialize (hb_serialize_context_t *c,
unsigned int num_components /* Including first component */)
{
TRACE_SERIALIZE (this);
- if (unlikely (!c->extend_min (*this))) return TRACE_RETURN (false);
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
ligGlyph = ligature;
- if (unlikely (!component.serialize (c, components, num_components))) return TRACE_RETURN (false);
- return TRACE_RETURN (true);
+ if (unlikely (!component.serialize (c, components, num_components))) return_trace (false);
+ return_trace (true);
}
public:
- inline bool sanitize (hb_sanitize_context_t *c) {
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
TRACE_SANITIZE (this);
- return TRACE_RETURN (ligGlyph.sanitize (c) && component.sanitize (c));
+ return_trace (ligGlyph.sanitize (c) && component.sanitize (c));
}
protected:
{
const Ligature &lig = this+ligature[i];
if (lig.would_apply (c))
- return TRACE_RETURN (true);
+ return_trace (true);
}
- return TRACE_RETURN (false);
+ return_trace (false);
}
- inline bool apply (hb_apply_context_t *c) const
+ inline bool apply (hb_ot_apply_context_t *c) const
{
TRACE_APPLY (this);
unsigned int num_ligs = ligature.len;
for (unsigned int i = 0; i < num_ligs; i++)
{
const Ligature &lig = this+ligature[i];
- if (lig.apply (c)) return TRACE_RETURN (true);
+ if (lig.apply (c)) return_trace (true);
}
- return TRACE_RETURN (false);
+ return_trace (false);
}
inline bool serialize (hb_serialize_context_t *c,
Supplier<GlyphID> &component_list /* Starting from second for each ligature */)
{
TRACE_SERIALIZE (this);
- if (unlikely (!c->extend_min (*this))) return TRACE_RETURN (false);
- if (unlikely (!ligature.serialize (c, num_ligatures))) return TRACE_RETURN (false);
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
+ if (unlikely (!ligature.serialize (c, num_ligatures))) return_trace (false);
for (unsigned int i = 0; i < num_ligatures; i++)
if (unlikely (!ligature[i].serialize (c, this).serialize (c,
ligatures[i],
component_list,
- component_count_list[i]))) return TRACE_RETURN (false);
- ligatures.advance (num_ligatures);
- component_count_list.advance (num_ligatures);
- return TRACE_RETURN (true);
+ component_count_list[i]))) return_trace (false);
+ ligatures += num_ligatures;
+ component_count_list += num_ligatures;
+ return_trace (true);
}
- inline bool sanitize (hb_sanitize_context_t *c) {
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
TRACE_SANITIZE (this);
- return TRACE_RETURN (ligature.sanitize (c, this));
+ return_trace (ligature.sanitize (c, this));
}
protected:
{
TRACE_CLOSURE (this);
Coverage::Iter iter;
- for (iter.init (this+coverage); iter.more (); iter.next ()) {
+ unsigned int count = ligatureSet.len;
+ for (iter.init (this+coverage); iter.more (); iter.next ())
+ {
+ if (unlikely (iter.get_coverage () >= count))
+ break; /* Work around malicious fonts. https://github.com/harfbuzz/harfbuzz/issues/363 */
if (c->glyphs->has (iter.get_glyph ()))
(this+ligatureSet[iter.get_coverage ()]).closure (c);
}
inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
{
TRACE_COLLECT_GLYPHS (this);
+ if (unlikely (!(this+coverage).add_coverage (c->input))) return;
Coverage::Iter iter;
- for (iter.init (this+coverage); iter.more (); iter.next ()) {
- c->input->add (iter.get_glyph ());
+ unsigned int count = ligatureSet.len;
+ for (iter.init (this+coverage); iter.more (); iter.next ())
+ {
+ if (unlikely (iter.get_coverage () >= count))
+ break; /* Work around malicious fonts. https://github.com/harfbuzz/harfbuzz/issues/363 */
(this+ligatureSet[iter.get_coverage ()]).collect_glyphs (c);
}
}
{
TRACE_WOULD_APPLY (this);
unsigned int index = (this+coverage).get_coverage (c->glyphs[0]);
- if (likely (index == NOT_COVERED)) return TRACE_RETURN (false);
+ if (likely (index == NOT_COVERED)) return_trace (false);
const LigatureSet &lig_set = this+ligatureSet[index];
- return TRACE_RETURN (lig_set.would_apply (c));
+ return_trace (lig_set.would_apply (c));
}
- inline bool apply (hb_apply_context_t *c) const
+ inline bool apply (hb_ot_apply_context_t *c) const
{
TRACE_APPLY (this);
hb_codepoint_t glyph_id = c->buffer->cur().codepoint;
unsigned int index = (this+coverage).get_coverage (glyph_id);
- if (likely (index == NOT_COVERED)) return TRACE_RETURN (false);
+ if (likely (index == NOT_COVERED)) return_trace (false);
const LigatureSet &lig_set = this+ligatureSet[index];
- return TRACE_RETURN (lig_set.apply (c));
+ return_trace (lig_set.apply (c));
}
inline bool serialize (hb_serialize_context_t *c,
Supplier<GlyphID> &component_list /* Starting from second for each ligature */)
{
TRACE_SERIALIZE (this);
- if (unlikely (!c->extend_min (*this))) return TRACE_RETURN (false);
- if (unlikely (!ligatureSet.serialize (c, num_first_glyphs))) return TRACE_RETURN (false);
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
+ if (unlikely (!ligatureSet.serialize (c, num_first_glyphs))) return_trace (false);
for (unsigned int i = 0; i < num_first_glyphs; i++)
if (unlikely (!ligatureSet[i].serialize (c, this).serialize (c,
ligatures_list,
component_count_list,
ligature_per_first_glyph_count_list[i],
- component_list))) return TRACE_RETURN (false);
- ligature_per_first_glyph_count_list.advance (num_first_glyphs);
- if (unlikely (!coverage.serialize (c, this).serialize (c, first_glyphs, num_first_glyphs))) return TRACE_RETURN (false);
- return TRACE_RETURN (true);
+ component_list))) return_trace (false);
+ ligature_per_first_glyph_count_list += num_first_glyphs;
+ if (unlikely (!coverage.serialize (c, this).serialize (c, first_glyphs, num_first_glyphs))) return_trace (false);
+ return_trace (true);
}
- inline bool sanitize (hb_sanitize_context_t *c) {
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
TRACE_SANITIZE (this);
- return TRACE_RETURN (coverage.sanitize (c, this) && ligatureSet.sanitize (c, this));
+ return_trace (coverage.sanitize (c, this) && ligatureSet.sanitize (c, this));
}
protected:
- USHORT format; /* Format identifier--format = 1 */
+ HBUINT16 format; /* Format identifier--format = 1 */
OffsetTo<Coverage>
coverage; /* Offset to Coverage table--from
* beginning of Substitution table */
struct LigatureSubst
{
- template <typename context_t>
- inline typename context_t::return_t process (context_t *c) const
- {
- TRACE_PROCESS (this);
- switch (u.format) {
- case 1: return TRACE_RETURN (c->process (u.format1));
- default:return TRACE_RETURN (c->default_return_value ());
- }
- }
-
inline bool serialize (hb_serialize_context_t *c,
Supplier<GlyphID> &first_glyphs,
Supplier<unsigned int> &ligature_per_first_glyph_count_list,
Supplier<GlyphID> &component_list /* Starting from second for each ligature */)
{
TRACE_SERIALIZE (this);
- if (unlikely (!c->extend_min (u.format))) return TRACE_RETURN (false);
+ if (unlikely (!c->extend_min (u.format))) return_trace (false);
unsigned int format = 1;
u.format.set (format);
switch (u.format) {
- case 1: return TRACE_RETURN (u.format1.serialize (c, first_glyphs, ligature_per_first_glyph_count_list, num_first_glyphs,
- ligatures_list, component_count_list, component_list));
- default:return TRACE_RETURN (false);
+ case 1: return_trace (u.format1.serialize (c,
+ first_glyphs,
+ ligature_per_first_glyph_count_list,
+ num_first_glyphs,
+ ligatures_list,
+ component_count_list,
+ component_list));
+ default:return_trace (false);
}
}
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- if (!u.format.sanitize (c)) return TRACE_RETURN (false);
+ template <typename context_t>
+ inline typename context_t::return_t dispatch (context_t *c) const
+ {
+ TRACE_DISPATCH (this, u.format);
+ if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ());
switch (u.format) {
- case 1: return TRACE_RETURN (u.format1.sanitize (c));
- default:return TRACE_RETURN (true);
+ case 1: return_trace (c->dispatch (u.format1));
+ default:return_trace (c->default_return_value ());
}
}
protected:
union {
- USHORT format; /* Format identifier */
+ HBUINT16 format; /* Format identifier */
LigatureSubstFormat1 format1;
} u;
};
const ArrayOf<GlyphID> &substitute = StructAfter<ArrayOf<GlyphID> > (lookahead);
Coverage::Iter iter;
- for (iter.init (this+coverage); iter.more (); iter.next ()) {
+ count = substitute.len;
+ for (iter.init (this+coverage); iter.more (); iter.next ())
+ {
+ if (unlikely (iter.get_coverage () >= count))
+ break; /* Work around malicious fonts. https://github.com/harfbuzz/harfbuzz/issues/363 */
if (c->glyphs->has (iter.get_glyph ()))
c->glyphs->add (substitute[iter.get_coverage ()]);
}
inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
{
TRACE_COLLECT_GLYPHS (this);
-
- const OffsetArrayOf<Coverage> &lookahead = StructAfter<OffsetArrayOf<Coverage> > (backtrack);
+ if (unlikely (!(this+coverage).add_coverage (c->input))) return;
unsigned int count;
- (this+coverage).add_coverage (c->input);
-
count = backtrack.len;
for (unsigned int i = 0; i < count; i++)
- (this+backtrack[i]).add_coverage (c->before);
+ if (unlikely (!(this+backtrack[i]).add_coverage (c->before))) return;
+ const OffsetArrayOf<Coverage> &lookahead = StructAfter<OffsetArrayOf<Coverage> > (backtrack);
count = lookahead.len;
for (unsigned int i = 0; i < count; i++)
- (this+lookahead[i]).add_coverage (c->after);
+ if (unlikely (!(this+lookahead[i]).add_coverage (c->after))) return;
const ArrayOf<GlyphID> &substitute = StructAfter<ArrayOf<GlyphID> > (lookahead);
count = substitute.len;
- for (unsigned int i = 0; i < count; i++)
- c->output->add (substitute[i]);
+ c->output->add_array (substitute.array, substitute.len);
}
inline const Coverage &get_coverage (void) const
inline bool would_apply (hb_would_apply_context_t *c) const
{
TRACE_WOULD_APPLY (this);
- return TRACE_RETURN (c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED);
+ return_trace (c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED);
}
- inline bool apply (hb_apply_context_t *c) const
+ inline bool apply (hb_ot_apply_context_t *c) const
{
TRACE_APPLY (this);
- if (unlikely (c->nesting_level_left != MAX_NESTING_LEVEL))
- return TRACE_RETURN (false); /* No chaining to this type */
+ if (unlikely (c->nesting_level_left != HB_MAX_NESTING_LEVEL))
+ return_trace (false); /* No chaining to this type */
unsigned int index = (this+coverage).get_coverage (c->buffer->cur().codepoint);
- if (likely (index == NOT_COVERED)) return TRACE_RETURN (false);
+ if (likely (index == NOT_COVERED)) return_trace (false);
const OffsetArrayOf<Coverage> &lookahead = StructAfter<OffsetArrayOf<Coverage> > (backtrack);
const ArrayOf<GlyphID> &substitute = StructAfter<ArrayOf<GlyphID> > (lookahead);
+ unsigned int start_index = 0, end_index = 0;
if (match_backtrack (c,
- backtrack.len, (USHORT *) backtrack.array,
- match_coverage, this) &&
+ backtrack.len, (HBUINT16 *) backtrack.array,
+ match_coverage, this,
+ &start_index) &&
match_lookahead (c,
- lookahead.len, (USHORT *) lookahead.array,
+ lookahead.len, (HBUINT16 *) lookahead.array,
match_coverage, this,
- 1))
+ 1, &end_index))
{
+ c->buffer->unsafe_to_break_from_outbuffer (start_index, end_index);
c->replace_glyph_inplace (substitute[index]);
- c->buffer->idx--; /* Reverse! */
- return TRACE_RETURN (true);
+ /* Note: We DON'T decrease buffer->idx. The main loop does it
+ * for us. This is useful for preventing surprises if someone
+ * calls us through a Context lookup. */
+ return_trace (true);
}
- return TRACE_RETURN (false);
+ return_trace (false);
}
- inline bool sanitize (hb_sanitize_context_t *c) {
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
TRACE_SANITIZE (this);
if (!(coverage.sanitize (c, this) && backtrack.sanitize (c, this)))
- return TRACE_RETURN (false);
- OffsetArrayOf<Coverage> &lookahead = StructAfter<OffsetArrayOf<Coverage> > (backtrack);
+ return_trace (false);
+ const OffsetArrayOf<Coverage> &lookahead = StructAfter<OffsetArrayOf<Coverage> > (backtrack);
if (!lookahead.sanitize (c, this))
- return TRACE_RETURN (false);
- ArrayOf<GlyphID> &substitute = StructAfter<ArrayOf<GlyphID> > (lookahead);
- return TRACE_RETURN (substitute.sanitize (c));
+ return_trace (false);
+
const ArrayOf<GlyphID> &substitute = StructAfter<ArrayOf<GlyphID> > (lookahead);
+ return_trace (substitute.sanitize (c));
}
protected:
- USHORT format; /* Format identifier--format = 1 */
+ HBUINT16 format; /* Format identifier--format = 1 */
OffsetTo<Coverage>
coverage; /* Offset to Coverage table--from
* beginning of table */
struct ReverseChainSingleSubst
{
template <typename context_t>
- inline typename context_t::return_t process (context_t *c) const
+ inline typename context_t::return_t dispatch (context_t *c) const
{
- TRACE_PROCESS (this);
- switch (u.format) {
- case 1: return TRACE_RETURN (c->process (u.format1));
- default:return TRACE_RETURN (c->default_return_value ());
- }
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- if (!u.format.sanitize (c)) return TRACE_RETURN (false);
+ TRACE_DISPATCH (this, u.format);
+ if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ());
switch (u.format) {
- case 1: return TRACE_RETURN (u.format1.sanitize (c));
- default:return TRACE_RETURN (true);
+ case 1: return_trace (c->dispatch (u.format1));
+ default:return_trace (c->default_return_value ());
}
}
protected:
union {
- USHORT format; /* Format identifier */
+ HBUINT16 format; /* Format identifier */
ReverseChainSingleSubstFormat1 format1;
} u;
};
};
template <typename context_t>
- inline typename context_t::return_t process (context_t *c, unsigned int lookup_type) const
+ inline typename context_t::return_t dispatch (context_t *c, unsigned int lookup_type) const
{
- TRACE_PROCESS (this);
- switch (lookup_type) {
- case Single: return TRACE_RETURN (u.single.process (c));
- case Multiple: return TRACE_RETURN (u.multiple.process (c));
- case Alternate: return TRACE_RETURN (u.alternate.process (c));
- case Ligature: return TRACE_RETURN (u.ligature.process (c));
- case Context: return TRACE_RETURN (u.context.process (c));
- case ChainContext: return TRACE_RETURN (u.chainContext.process (c));
- case Extension: return TRACE_RETURN (u.extension.process (c));
- case ReverseChainSingle: return TRACE_RETURN (u.reverseChainContextSingle.process (c));
- default: return TRACE_RETURN (c->default_return_value ());
- }
- }
-
- inline bool sanitize (hb_sanitize_context_t *c, unsigned int lookup_type) {
- TRACE_SANITIZE (this);
- if (!u.header.sub_format.sanitize (c))
- return TRACE_RETURN (false);
+ TRACE_DISPATCH (this, lookup_type);
+ if (unlikely (!c->may_dispatch (this, &u.sub_format))) return_trace (c->no_dispatch_return_value ());
switch (lookup_type) {
- case Single: return TRACE_RETURN (u.single.sanitize (c));
- case Multiple: return TRACE_RETURN (u.multiple.sanitize (c));
- case Alternate: return TRACE_RETURN (u.alternate.sanitize (c));
- case Ligature: return TRACE_RETURN (u.ligature.sanitize (c));
- case Context: return TRACE_RETURN (u.context.sanitize (c));
- case ChainContext: return TRACE_RETURN (u.chainContext.sanitize (c));
- case Extension: return TRACE_RETURN (u.extension.sanitize (c));
- case ReverseChainSingle: return TRACE_RETURN (u.reverseChainContextSingle.sanitize (c));
- default: return TRACE_RETURN (true);
+ case Single: return_trace (u.single.dispatch (c));
+ case Multiple: return_trace (u.multiple.dispatch (c));
+ case Alternate: return_trace (u.alternate.dispatch (c));
+ case Ligature: return_trace (u.ligature.dispatch (c));
+ case Context: return_trace (u.context.dispatch (c));
+ case ChainContext: return_trace (u.chainContext.dispatch (c));
+ case Extension: return_trace (u.extension.dispatch (c));
+ case ReverseChainSingle: return_trace (u.reverseChainContextSingle.dispatch (c));
+ default: return_trace (c->default_return_value ());
}
}
protected:
union {
- struct {
- USHORT sub_format;
- } header;
+ HBUINT16 sub_format;
SingleSubst single;
MultipleSubst multiple;
AlternateSubst alternate;
ReverseChainSingleSubst reverseChainContextSingle;
} u;
public:
- DEFINE_SIZE_UNION (2, header.sub_format);
+ DEFINE_SIZE_UNION (2, sub_format);
};
struct SubstLookup : Lookup
{
inline const SubstLookupSubTable& get_subtable (unsigned int i) const
- { return this+CastR<OffsetArrayOf<SubstLookupSubTable> > (subTable)[i]; }
+ { return Lookup::get_subtable<SubstLookupSubTable> (i); }
inline static bool lookup_type_is_reverse (unsigned int lookup_type)
{ return lookup_type == SubstLookupSubTable::ReverseChainSingle; }
return lookup_type_is_reverse (type);
}
- template <typename context_t>
- inline typename context_t::return_t process (context_t *c) const
+ inline bool apply (hb_ot_apply_context_t *c) const
{
- TRACE_PROCESS (this);
- unsigned int lookup_type = get_type ();
- unsigned int count = get_subtable_count ();
- for (unsigned int i = 0; i < count; i++) {
- typename context_t::return_t r = get_subtable (i).process (c, lookup_type);
- if (c->stop_sublookup_iteration (r))
- return TRACE_RETURN (r);
- }
- return TRACE_RETURN (c->default_return_value ());
+ TRACE_APPLY (this);
+ return_trace (dispatch (c));
}
- template <typename context_t>
- static inline typename context_t::return_t process_recurse_func (context_t *c, unsigned int lookup_index);
inline hb_closure_context_t::return_t closure (hb_closure_context_t *c) const
{
TRACE_CLOSURE (this);
- c->set_recurse_func (process_recurse_func<hb_closure_context_t>);
- return TRACE_RETURN (process (c));
+ c->set_recurse_func (dispatch_recurse_func<hb_closure_context_t>);
+ return_trace (dispatch (c));
}
- inline hb_collect_glyphs_context_t::return_t collect_glyphs_lookup (hb_collect_glyphs_context_t *c) const
+ inline hb_collect_glyphs_context_t::return_t collect_glyphs (hb_collect_glyphs_context_t *c) const
{
TRACE_COLLECT_GLYPHS (this);
- c->set_recurse_func (process_recurse_func<hb_collect_glyphs_context_t>);
- return TRACE_RETURN (process (c));
+ c->set_recurse_func (dispatch_recurse_func<hb_collect_glyphs_context_t>);
+ return_trace (dispatch (c));
}
template <typename set_t>
inline void add_coverage (set_t *glyphs) const
{
- hb_get_coverage_context_t c;
- const Coverage *last = NULL;
- unsigned int count = get_subtable_count ();
- for (unsigned int i = 0; i < count; i++) {
- const Coverage *coverage = &get_subtable (i).process (&c, get_type ());
- if (coverage != last) {
- coverage->add_coverage (glyphs);
- last = coverage;
- }
- }
+ hb_add_coverage_context_t<set_t> c (glyphs);
+ dispatch (&c);
}
- inline bool would_apply (hb_would_apply_context_t *c, const hb_set_digest_t *digest) const
+ inline bool would_apply (hb_would_apply_context_t *c,
+ const hb_ot_layout_lookup_accelerator_t *accel) const
{
TRACE_WOULD_APPLY (this);
- if (unlikely (!c->len)) return TRACE_RETURN (false);
- if (!digest->may_have (c->glyphs[0])) return TRACE_RETURN (false);
- return TRACE_RETURN (process (c));
- }
-
- inline bool apply_once (hb_apply_context_t *c) const
- {
- TRACE_APPLY (this);
- if (!c->check_glyph_property (&c->buffer->cur(), c->lookup_props, &c->property))
- return TRACE_RETURN (false);
- return TRACE_RETURN (process (c));
+ if (unlikely (!c->len)) return_trace (false);
+ if (!accel->may_have (c->glyphs[0])) return_trace (false);
+ return_trace (dispatch (c));
}
- static bool apply_recurse_func (hb_apply_context_t *c, unsigned int lookup_index);
- inline bool apply_string (hb_apply_context_t *c, const hb_set_digest_t *digest) const
- {
- bool ret = false;
-
- if (unlikely (!c->buffer->len || !c->lookup_mask))
- return false;
-
- c->set_recurse_func (apply_recurse_func);
- c->set_lookup (*this);
-
- if (likely (!is_reverse ()))
- {
- /* in/out forward substitution */
- c->buffer->clear_output ();
- c->buffer->idx = 0;
-
- while (c->buffer->idx < c->buffer->len)
- {
- if ((c->buffer->cur().mask & c->lookup_mask) &&
- digest->may_have (c->buffer->cur().codepoint) &&
- apply_once (c))
- ret = true;
- else
- c->buffer->next_glyph ();
- }
- if (ret)
- c->buffer->swap_buffers ();
- }
- else
- {
- /* in-place backward substitution */
- c->buffer->remove_output ();
- c->buffer->idx = c->buffer->len - 1;
- do
- {
- if ((c->buffer->cur().mask & c->lookup_mask) &&
- digest->may_have (c->buffer->cur().codepoint) &&
- apply_once (c))
- ret = true;
- else
- c->buffer->idx--;
-
- }
- while ((int) c->buffer->idx >= 0);
- }
-
- return ret;
- }
+ static bool apply_recurse_func (hb_ot_apply_context_t *c, unsigned int lookup_index);
inline SubstLookupSubTable& serialize_subtable (hb_serialize_context_t *c,
unsigned int i)
- { return CastR<OffsetArrayOf<SubstLookupSubTable> > (subTable)[i].serialize (c, this); }
+ { return get_subtables<SubstLookupSubTable> ()[i].serialize (c, this); }
inline bool serialize_single (hb_serialize_context_t *c,
uint32_t lookup_props,
unsigned int num_glyphs)
{
TRACE_SERIALIZE (this);
- if (unlikely (!Lookup::serialize (c, SubstLookupSubTable::Single, lookup_props, 1))) return TRACE_RETURN (false);
- return TRACE_RETURN (serialize_subtable (c, 0).u.single.serialize (c, glyphs, substitutes, num_glyphs));
+ if (unlikely (!Lookup::serialize (c, SubstLookupSubTable::Single, lookup_props, 1))) return_trace (false);
+ return_trace (serialize_subtable (c, 0).u.single.serialize (c, glyphs, substitutes, num_glyphs));
}
inline bool serialize_multiple (hb_serialize_context_t *c,
Supplier<GlyphID> &substitute_glyphs_list)
{
TRACE_SERIALIZE (this);
- if (unlikely (!Lookup::serialize (c, SubstLookupSubTable::Multiple, lookup_props, 1))) return TRACE_RETURN (false);
- return TRACE_RETURN (serialize_subtable (c, 0).u.multiple.serialize (c, glyphs, substitute_len_list, num_glyphs,
- substitute_glyphs_list));
+ if (unlikely (!Lookup::serialize (c, SubstLookupSubTable::Multiple, lookup_props, 1))) return_trace (false);
+ return_trace (serialize_subtable (c, 0).u.multiple.serialize (c,
+ glyphs,
+ substitute_len_list,
+ num_glyphs,
+ substitute_glyphs_list));
}
inline bool serialize_alternate (hb_serialize_context_t *c,
Supplier<GlyphID> &alternate_glyphs_list)
{
TRACE_SERIALIZE (this);
- if (unlikely (!Lookup::serialize (c, SubstLookupSubTable::Alternate, lookup_props, 1))) return TRACE_RETURN (false);
- return TRACE_RETURN (serialize_subtable (c, 0).u.alternate.serialize (c, glyphs, alternate_len_list, num_glyphs,
- alternate_glyphs_list));
+ if (unlikely (!Lookup::serialize (c, SubstLookupSubTable::Alternate, lookup_props, 1))) return_trace (false);
+ return_trace (serialize_subtable (c, 0).u.alternate.serialize (c,
+ glyphs,
+ alternate_len_list,
+ num_glyphs,
+ alternate_glyphs_list));
}
inline bool serialize_ligature (hb_serialize_context_t *c,
Supplier<GlyphID> &component_list /* Starting from second for each ligature */)
{
TRACE_SERIALIZE (this);
- if (unlikely (!Lookup::serialize (c, SubstLookupSubTable::Ligature, lookup_props, 1))) return TRACE_RETURN (false);
- return TRACE_RETURN (serialize_subtable (c, 0).u.ligature.serialize (c, first_glyphs, ligature_per_first_glyph_count_list, num_first_glyphs,
- ligatures_list, component_count_list, component_list));
+ if (unlikely (!Lookup::serialize (c, SubstLookupSubTable::Ligature, lookup_props, 1))) return_trace (false);
+ return_trace (serialize_subtable (c, 0).u.ligature.serialize (c,
+ first_glyphs,
+ ligature_per_first_glyph_count_list,
+ num_first_glyphs,
+ ligatures_list,
+ component_count_list,
+ component_list));
}
- inline bool sanitize (hb_sanitize_context_t *c)
+ template <typename context_t>
+ static inline typename context_t::return_t dispatch_recurse_func (context_t *c, unsigned int lookup_index);
+
+ template <typename context_t>
+ inline typename context_t::return_t dispatch (context_t *c) const
+ { return Lookup::dispatch<SubstLookupSubTable> (c); }
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
- if (unlikely (!Lookup::sanitize (c))) return TRACE_RETURN (false);
- OffsetArrayOf<SubstLookupSubTable> &list = CastR<OffsetArrayOf<SubstLookupSubTable> > (subTable);
- if (unlikely (!list.sanitize (c, this, get_type ()))) return TRACE_RETURN (false);
+ if (unlikely (!Lookup::sanitize (c))) return_trace (false);
+ if (unlikely (!dispatch (c))) return_trace (false);
if (unlikely (get_type () == SubstLookupSubTable::Extension))
{
/* The spec says all subtables of an Extension lookup should
- * have the same type. This is specially important if one has
- * a reverse type!
- *
- * We just check that they are all either forward, or reverse. */
+ * have the same type, which shall not be the Extension type
+ * itself (but we already checked for that).
+ * This is specially important if one has a reverse type! */
unsigned int type = get_subtable (0).u.extension.get_type ();
unsigned int count = get_subtable_count ();
for (unsigned int i = 1; i < count; i++)
if (get_subtable (i).u.extension.get_type () != type)
- return TRACE_RETURN (false);
+ return_trace (false);
}
- return TRACE_RETURN (true);
+ return_trace (true);
}
};
struct GSUB : GSUBGPOS
{
- static const hb_tag_t Tag = HB_OT_TAG_GSUB;
+ static const hb_tag_t tableTag = HB_OT_TAG_GSUB;
inline const SubstLookup& get_lookup (unsigned int i) const
{ return CastR<SubstLookup> (GSUBGPOS::get_lookup (i)); }
static inline void substitute_start (hb_font_t *font, hb_buffer_t *buffer);
- static inline void substitute_finish (hb_font_t *font, hb_buffer_t *buffer);
- inline bool sanitize (hb_sanitize_context_t *c) {
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
TRACE_SANITIZE (this);
- if (unlikely (!GSUBGPOS::sanitize (c))) return TRACE_RETURN (false);
- OffsetTo<SubstLookupList> &list = CastR<OffsetTo<SubstLookupList> > (lookupList);
- return TRACE_RETURN (list.sanitize (c, this));
+ if (unlikely (!GSUBGPOS::sanitize (c))) return_trace (false);
+ const OffsetTo<SubstLookupList> &list = CastR<OffsetTo<SubstLookupList> > (lookupList);
+ return_trace (list.sanitize (c, this));
}
- public:
- DEFINE_SIZE_STATIC (10);
};
void
GSUB::substitute_start (hb_font_t *font, hb_buffer_t *buffer)
{
- HB_BUFFER_ALLOCATE_VAR (buffer, glyph_props);
- HB_BUFFER_ALLOCATE_VAR (buffer, lig_props);
- HB_BUFFER_ALLOCATE_VAR (buffer, syllable);
+ _hb_buffer_assert_gsubgpos_vars (buffer);
const GDEF &gdef = *hb_ot_layout_from_face (font->face)->gdef;
unsigned int count = buffer->len;
- for (unsigned int i = 0; i < count; i++) {
- buffer->info[i].lig_props() = buffer->info[i].syllable() = 0;
- buffer->info[i].glyph_props() = gdef.get_glyph_props (buffer->info[i].codepoint);
+ for (unsigned int i = 0; i < count; i++)
+ {
+ _hb_glyph_info_set_glyph_props (&buffer->info[i], gdef.get_glyph_props (buffer->info[i].codepoint));
+ _hb_glyph_info_clear_lig_props (&buffer->info[i]);
+ buffer->info[i].syllable() = 0;
}
}
-void
-GSUB::substitute_finish (hb_font_t *font HB_UNUSED, hb_buffer_t *buffer HB_UNUSED)
-{
-}
-
/* Out-of-class implementation for methods recursing */
-inline bool ExtensionSubst::is_reverse (void) const
+/*static*/ inline bool ExtensionSubst::is_reverse (void) const
{
unsigned int type = get_type ();
if (unlikely (type == SubstLookupSubTable::Extension))
- return CastR<ExtensionSubst> (get_subtable<SubstLookupSubTable>()).is_reverse ();
+ return CastR<ExtensionSubst> (get_subtable<LookupSubTable>()).is_reverse ();
return SubstLookup::lookup_type_is_reverse (type);
}
template <typename context_t>
-inline typename context_t::return_t SubstLookup::process_recurse_func (context_t *c, unsigned int lookup_index)
+/*static*/ inline typename context_t::return_t SubstLookup::dispatch_recurse_func (context_t *c, unsigned int lookup_index)
{
const GSUB &gsub = *(hb_ot_layout_from_face (c->face)->gsub);
const SubstLookup &l = gsub.get_lookup (lookup_index);
- return l.process (c);
+ return l.dispatch (c);
}
-inline bool SubstLookup::apply_recurse_func (hb_apply_context_t *c, unsigned int lookup_index)
+/*static*/ inline bool SubstLookup::apply_recurse_func (hb_ot_apply_context_t *c, unsigned int lookup_index)
{
const GSUB &gsub = *(hb_ot_layout_from_face (c->face)->gsub);
const SubstLookup &l = gsub.get_lookup (lookup_index);
unsigned int saved_lookup_props = c->lookup_props;
- unsigned int saved_property = c->property;
- c->set_lookup (l);
- bool ret = l.apply_once (c);
- c->lookup_props = saved_lookup_props;
- c->property = saved_property;
+ unsigned int saved_lookup_index = c->lookup_index;
+ c->set_lookup_index (lookup_index);
+ c->set_lookup_props (l.get_props ());
+ bool ret = l.dispatch (c);
+ c->set_lookup_index (saved_lookup_index);
+ c->set_lookup_props (saved_lookup_props);
return ret;
}
projects / platform / upstream / harfbuzz.git / blobdiff