summaryrefslogtreecommitdiff
path: root/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-layout-gpos-table.hh
diff options
context:
space:
mode:
Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-layout-gpos-table.hh')
-rw-r--r--Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-layout-gpos-table.hh138
1 files changed, 76 insertions, 62 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-layout-gpos-table.hh b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-layout-gpos-table.hh
index 5ea70fbbdec..59dddcf73cb 100644
--- a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-layout-gpos-table.hh
+++ b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-layout-gpos-table.hh
@@ -36,8 +36,17 @@ namespace OT {
/* buffer **position** var allocations */
-#define attach_lookback() var.u16[0] /* number of glyphs to go back to attach this glyph to its base */
-#define cursive_chain() var.i16[1] /* character to which this connects, may be positive or negative */
+#define attach_chain() var.i16[0] /* glyph to which this attaches to, relative to current glyphs; negative for going back, positive for forward. */
+#define attach_type() var.u8[2] /* attachment type */
+/* Note! if attach_chain() is zero, the value of attach_type() is irrelevant. */
+
+enum attach_type_t {
+ ATTACH_TYPE_NONE = 0X00,
+
+ /* Each attachment should be either a mark or a cursive; can't be both. */
+ ATTACH_TYPE_MARK = 0X01,
+ ATTACH_TYPE_CURSIVE = 0X02,
+};
/* Shared Tables: ValueRecord, Anchor Table, and MarkArray */
@@ -425,8 +434,25 @@ struct MarkArray : ArrayOf<MarkRecord> /* Array of MarkRecords--in Coverage orde
hb_glyph_position_t &o = buffer->cur_pos();
o.x_offset = base_x - mark_x;
o.y_offset = base_y - mark_y;
- o.attach_lookback() = buffer->idx - glyph_pos;
+ o.attach_type() = ATTACH_TYPE_MARK;
+ o.attach_chain() = (int) glyph_pos - (int) buffer->idx;
buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_ATTACHMENT;
+ {
+ unsigned int i = buffer->idx;
+ unsigned int j = glyph_pos;
+ hb_glyph_position_t *pos = buffer->pos;
+ assert (j < i);
+ if (HB_DIRECTION_IS_FORWARD (c->direction))
+ for (unsigned int k = j; k < i; k++) {
+ pos[i].x_offset -= pos[k].x_advance;
+ pos[i].y_offset -= pos[k].y_advance;
+ }
+ else
+ for (unsigned int k = j + 1; k < i + 1; k++) {
+ pos[i].x_offset += pos[k].x_advance;
+ pos[i].y_offset += pos[k].y_advance;
+ }
+ }
buffer->idx++;
return_trace (true);
@@ -907,9 +933,6 @@ struct CursivePosFormat1
TRACE_APPLY (this);
hb_buffer_t *buffer = c->buffer;
- /* We don't handle mark glyphs here. */
- if (unlikely (_hb_glyph_info_is_mark (&buffer->cur()))) return_trace (false);
-
const EntryExitRecord &this_record = entryExitRecord[(this+coverage).get_coverage (buffer->cur().codepoint)];
if (!this_record.exitAnchor) return_trace (false);
@@ -993,8 +1016,9 @@ struct CursivePosFormat1
*/
reverse_cursive_minor_offset (pos, child, c->direction, parent);
- pos[child].cursive_chain() = parent - child;
- buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_CURSIVE;
+ pos[child].attach_type() = ATTACH_TYPE_CURSIVE;
+ pos[child].attach_chain() = (int) parent - (int) child;
+ buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_ATTACHMENT;
if (likely (HB_DIRECTION_IS_HORIZONTAL (c->direction)))
pos[child].y_offset = y_offset;
else
@@ -1069,7 +1093,7 @@ struct MarkBasePosFormat1
unsigned int mark_index = (this+markCoverage).get_coverage (buffer->cur().codepoint);
if (likely (mark_index == NOT_COVERED)) return_trace (false);
- /* now we search backwards for a non-mark glyph */
+ /* Now we search backwards for a non-mark glyph */
hb_apply_context_t::skipping_iterator_t &skippy_iter = c->iter_input;
skippy_iter.reset (buffer->idx, 1);
skippy_iter.set_lookup_props (LookupFlag::IgnoreMarks);
@@ -1081,7 +1105,7 @@ struct MarkBasePosFormat1
} while (1);
/* Checking that matched glyph is actually a base glyph by GDEF is too strong; disabled */
- if (!_hb_glyph_info_is_base_glyph (&buffer->info[skippy_iter.idx])) { /*return_trace (false);*/ }
+ //if (!_hb_glyph_info_is_base_glyph (&buffer->info[skippy_iter.idx])) { return_trace (false); }
unsigned int base_index = (this+baseCoverage).get_coverage (buffer->info[skippy_iter.idx].codepoint);
if (base_index == NOT_COVERED) return_trace (false);
@@ -1170,14 +1194,14 @@ struct MarkLigPosFormat1
unsigned int mark_index = (this+markCoverage).get_coverage (buffer->cur().codepoint);
if (likely (mark_index == NOT_COVERED)) return_trace (false);
- /* now we search backwards for a non-mark glyph */
+ /* Now we search backwards for a non-mark glyph */
hb_apply_context_t::skipping_iterator_t &skippy_iter = c->iter_input;
skippy_iter.reset (buffer->idx, 1);
skippy_iter.set_lookup_props (LookupFlag::IgnoreMarks);
if (!skippy_iter.prev ()) return_trace (false);
/* Checking that matched glyph is actually a ligature by GDEF is too strong; disabled */
- if (!_hb_glyph_info_is_ligature (&buffer->info[skippy_iter.idx])) { /*return_trace (false);*/ }
+ //if (!_hb_glyph_info_is_ligature (&buffer->info[skippy_iter.idx])) { return_trace (false); }
unsigned int j = skippy_iter.idx;
unsigned int lig_index = (this+ligatureCoverage).get_coverage (buffer->info[j].codepoint);
@@ -1501,7 +1525,8 @@ struct GPOS : GSUBGPOS
{ return CastR<PosLookup> (GSUBGPOS::get_lookup (i)); }
static inline void position_start (hb_font_t *font, hb_buffer_t *buffer);
- static inline void position_finish (hb_font_t *font, hb_buffer_t *buffer);
+ static inline void position_finish_advances (hb_font_t *font, hb_buffer_t *buffer);
+ static inline void position_finish_offsets (hb_font_t *font, hb_buffer_t *buffer);
inline bool sanitize (hb_sanitize_context_t *c) const
{
@@ -1518,13 +1543,13 @@ struct GPOS : GSUBGPOS
static void
reverse_cursive_minor_offset (hb_glyph_position_t *pos, unsigned int i, hb_direction_t direction, unsigned int new_parent)
{
- unsigned int j = pos[i].cursive_chain();
- if (likely (!j))
+ int chain = pos[i].attach_chain(), type = pos[i].attach_type();
+ if (likely (!chain || 0 == (type & ATTACH_TYPE_CURSIVE)))
return;
- j += i;
+ pos[i].attach_chain() = 0;
- pos[i].cursive_chain() = 0;
+ unsigned int j = (int) i + chain;
/* Stop if we see new parent in the chain. */
if (j == new_parent)
@@ -1537,62 +1562,56 @@ reverse_cursive_minor_offset (hb_glyph_position_t *pos, unsigned int i, hb_direc
else
pos[j].x_offset = -pos[i].x_offset;
- pos[j].cursive_chain() = i - j;
+ pos[j].attach_chain() = -chain;
+ pos[j].attach_type() = type;
}
static void
-fix_cursive_minor_offset (hb_glyph_position_t *pos, unsigned int i, hb_direction_t direction)
+propagate_attachment_offsets (hb_glyph_position_t *pos, unsigned int i, hb_direction_t direction)
{
- unsigned int j = pos[i].cursive_chain();
- if (likely (!j))
+ /* Adjusts offsets of attached glyphs (both cursive and mark) to accumulate
+ * offset of glyph they are attached to. */
+ int chain = pos[i].attach_chain(), type = pos[i].attach_type();
+ if (likely (!chain))
return;
- j += i;
-
- pos[i].cursive_chain() = 0;
+ unsigned int j = (int) i + chain;
- fix_cursive_minor_offset (pos, j, direction);
-
- if (HB_DIRECTION_IS_HORIZONTAL (direction))
- pos[i].y_offset += pos[j].y_offset;
- else
- pos[i].x_offset += pos[j].x_offset;
-}
-
-static void
-fix_mark_attachment (hb_glyph_position_t *pos, unsigned int i, hb_direction_t direction)
-{
- if (likely (!(pos[i].attach_lookback())))
- return;
+ pos[i].attach_chain() = 0;
- unsigned int j = i - pos[i].attach_lookback();
+ propagate_attachment_offsets (pos, j, direction);
- pos[i].x_offset += pos[j].x_offset;
- pos[i].y_offset += pos[j].y_offset;
+ assert (!!(type & ATTACH_TYPE_MARK) ^ !!(type & ATTACH_TYPE_CURSIVE));
- if (HB_DIRECTION_IS_FORWARD (direction))
- for (unsigned int k = j; k < i; k++) {
- pos[i].x_offset -= pos[k].x_advance;
- pos[i].y_offset -= pos[k].y_advance;
- }
- else
- for (unsigned int k = j + 1; k < i + 1; k++) {
- pos[i].x_offset += pos[k].x_advance;
- pos[i].y_offset += pos[k].y_advance;
- }
+ if (type & ATTACH_TYPE_CURSIVE)
+ {
+ if (HB_DIRECTION_IS_HORIZONTAL (direction))
+ pos[i].y_offset += pos[j].y_offset;
+ else
+ pos[i].x_offset += pos[j].x_offset;
+ }
+ else /*if (type & ATTACH_TYPE_MARK)*/
+ {
+ pos[i].x_offset += pos[j].x_offset;
+ pos[i].y_offset += pos[j].y_offset;
+ }
}
void
GPOS::position_start (hb_font_t *font HB_UNUSED, hb_buffer_t *buffer)
{
- buffer->clear_positions ();
-
unsigned int count = buffer->len;
for (unsigned int i = 0; i < count; i++)
- buffer->pos[i].attach_lookback() = buffer->pos[i].cursive_chain() = 0;
+ buffer->pos[i].attach_chain() = buffer->pos[i].attach_type() = 0;
}
void
-GPOS::position_finish (hb_font_t *font HB_UNUSED, hb_buffer_t *buffer)
+GPOS::position_finish_advances (hb_font_t *font HB_UNUSED, hb_buffer_t *buffer)
+{
+ //_hb_buffer_assert_gsubgpos_vars (buffer);
+}
+
+void
+GPOS::position_finish_offsets (hb_font_t *font HB_UNUSED, hb_buffer_t *buffer)
{
_hb_buffer_assert_gsubgpos_vars (buffer);
@@ -1600,15 +1619,10 @@ GPOS::position_finish (hb_font_t *font HB_UNUSED, hb_buffer_t *buffer)
hb_glyph_position_t *pos = hb_buffer_get_glyph_positions (buffer, &len);
hb_direction_t direction = buffer->props.direction;
- /* Handle cursive connections */
- if (buffer->scratch_flags & HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_CURSIVE)
- for (unsigned int i = 0; i < len; i++)
- fix_cursive_minor_offset (pos, i, direction);
-
/* Handle attachments */
if (buffer->scratch_flags & HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_ATTACHMENT)
for (unsigned int i = 0; i < len; i++)
- fix_mark_attachment (pos, i, direction);
+ propagate_attachment_offsets (pos, i, direction);
}
@@ -1637,8 +1651,8 @@ template <typename context_t>
}
-#undef attach_lookback
-#undef cursive_chain
+#undef attach_chain
+#undef attach_type
} /* namespace OT */