diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-layout-gpos-table.hh')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-layout-gpos-table.hh | 1619 |
1 files changed, 27 insertions, 1592 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-layout-gpos-table.hh b/src/3rdparty/harfbuzz-ng/src/hb-ot-layout-gpos-table.hh index b344d793c7..0cfa139a26 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-ot-layout-gpos-table.hh +++ b/src/3rdparty/harfbuzz-ng/src/hb-ot-layout-gpos-table.hh @@ -29,1617 +29,52 @@ #ifndef HB_OT_LAYOUT_GPOS_TABLE_HH #define HB_OT_LAYOUT_GPOS_TABLE_HH -#include "hb-ot-layout-gsubgpos-private.hh" - +#include "OT/Layout/GPOS/GPOS.hh" namespace OT { +namespace Layout { +namespace GPOS_impl { - -/* buffer **position** var allocations */ -#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 */ - -typedef UINT16 Value; - -typedef Value ValueRecord[VAR]; - -struct ValueFormat : UINT16 -{ - enum Flags { - xPlacement = 0x0001u, /* Includes horizontal adjustment for placement */ - yPlacement = 0x0002u, /* Includes vertical adjustment for placement */ - xAdvance = 0x0004u, /* Includes horizontal adjustment for advance */ - yAdvance = 0x0008u, /* Includes vertical adjustment for advance */ - xPlaDevice = 0x0010u, /* Includes horizontal Device table for placement */ - yPlaDevice = 0x0020u, /* Includes vertical Device table for placement */ - xAdvDevice = 0x0040u, /* Includes horizontal Device table for advance */ - yAdvDevice = 0x0080u, /* Includes vertical Device table for advance */ - ignored = 0x0F00u, /* Was used in TrueType Open for MM fonts */ - reserved = 0xF000u, /* For future use */ - - devices = 0x00F0u /* Mask for having any Device table */ - }; - -/* All fields are options. Only those available advance the value pointer. */ -#if 0 - INT16 xPlacement; /* Horizontal adjustment for - * placement--in design units */ - INT16 yPlacement; /* Vertical adjustment for - * placement--in design units */ - INT16 xAdvance; /* Horizontal adjustment for - * advance--in design units (only used - * for horizontal writing) */ - INT16 yAdvance; /* Vertical adjustment for advance--in - * design units (only used for vertical - * writing) */ - Offset xPlaDevice; /* Offset to Device table for - * horizontal placement--measured from - * beginning of PosTable (may be NULL) */ - Offset yPlaDevice; /* Offset to Device table for vertical - * placement--measured from beginning - * of PosTable (may be NULL) */ - Offset xAdvDevice; /* Offset to Device table for - * horizontal advance--measured from - * beginning of PosTable (may be NULL) */ - Offset yAdvDevice; /* Offset to Device table for vertical - * advance--measured from beginning of - * PosTable (may be NULL) */ -#endif - - inline unsigned int get_len (void) const - { return _hb_popcount32 ((unsigned int) *this); } - inline unsigned int get_size (void) const - { return get_len () * Value::static_size; } - - void apply_value (hb_apply_context_t *c, - const void *base, - const Value *values, - hb_glyph_position_t &glyph_pos) const - { - unsigned int format = *this; - if (!format) return; - - hb_font_t *font = c->font; - hb_bool_t horizontal = HB_DIRECTION_IS_HORIZONTAL (c->direction); - - if (format & xPlacement) glyph_pos.x_offset += font->em_scale_x (get_short (values++)); - if (format & yPlacement) glyph_pos.y_offset += font->em_scale_y (get_short (values++)); - if (format & xAdvance) { - if (likely (horizontal)) glyph_pos.x_advance += font->em_scale_x (get_short (values)); - values++; - } - /* y_advance values grow downward but font-space grows upward, hence negation */ - if (format & yAdvance) { - if (unlikely (!horizontal)) glyph_pos.y_advance -= font->em_scale_y (get_short (values)); - values++; - } - - if (!has_device ()) return; - - bool use_x_device = font->x_ppem || font->num_coords; - bool use_y_device = font->y_ppem || font->num_coords; - - if (!use_x_device && !use_y_device) return; - - const VariationStore &store = c->var_store; - - /* pixel -> fractional pixel */ - if (format & xPlaDevice) { - if (use_x_device) glyph_pos.x_offset += (base + get_device (values)).get_x_delta (font, store); - values++; - } - if (format & yPlaDevice) { - if (use_y_device) glyph_pos.y_offset += (base + get_device (values)).get_y_delta (font, store); - values++; - } - if (format & xAdvDevice) { - if (horizontal && use_x_device) glyph_pos.x_advance += (base + get_device (values)).get_x_delta (font, store); - values++; - } - if (format & yAdvDevice) { - /* y_advance values grow downward but font-space grows upward, hence negation */ - if (!horizontal && use_y_device) glyph_pos.y_advance -= (base + get_device (values)).get_y_delta (font, store); - values++; - } - } - - private: - inline bool sanitize_value_devices (hb_sanitize_context_t *c, const void *base, const Value *values) const - { - unsigned int format = *this; - - if (format & xPlacement) values++; - if (format & yPlacement) values++; - if (format & xAdvance) values++; - if (format & yAdvance) values++; - - if ((format & xPlaDevice) && !get_device (values++).sanitize (c, base)) return false; - if ((format & yPlaDevice) && !get_device (values++).sanitize (c, base)) return false; - if ((format & xAdvDevice) && !get_device (values++).sanitize (c, base)) return false; - if ((format & yAdvDevice) && !get_device (values++).sanitize (c, base)) return false; - - return true; - } - - static inline OffsetTo<Device>& get_device (Value* value) - { return *CastP<OffsetTo<Device> > (value); } - static inline const OffsetTo<Device>& get_device (const Value* value) - { return *CastP<OffsetTo<Device> > (value); } - - static inline const INT16& get_short (const Value* value) - { return *CastP<INT16> (value); } - - public: - - inline bool has_device (void) const { - unsigned int format = *this; - return (format & devices) != 0; - } - - inline bool sanitize_value (hb_sanitize_context_t *c, const void *base, const Value *values) const - { - TRACE_SANITIZE (this); - return_trace (c->check_range (values, get_size ()) && (!has_device () || sanitize_value_devices (c, base, values))); - } - - inline bool sanitize_values (hb_sanitize_context_t *c, const void *base, const Value *values, unsigned int count) const - { - TRACE_SANITIZE (this); - unsigned int len = get_len (); - - if (!c->check_array (values, get_size (), count)) return_trace (false); - - if (!has_device ()) return_trace (true); - - for (unsigned int i = 0; i < count; i++) { - if (!sanitize_value_devices (c, base, values)) - return_trace (false); - values += len; - } - - return_trace (true); - } - - /* Just sanitize referenced Device tables. Doesn't check the values themselves. */ - inline bool sanitize_values_stride_unsafe (hb_sanitize_context_t *c, const void *base, const Value *values, unsigned int count, unsigned int stride) const - { - TRACE_SANITIZE (this); - - if (!has_device ()) return_trace (true); - - for (unsigned int i = 0; i < count; i++) { - if (!sanitize_value_devices (c, base, values)) - return_trace (false); - values += stride; - } - - return_trace (true); - } -}; - - -struct AnchorFormat1 -{ - inline void get_anchor (hb_apply_context_t *c, hb_codepoint_t glyph_id HB_UNUSED, - hb_position_t *x, hb_position_t *y) const - { - hb_font_t *font = c->font; - *x = font->em_scale_x (xCoordinate); - *y = font->em_scale_y (yCoordinate); - } - - inline bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - return_trace (c->check_struct (this)); - } - - protected: - UINT16 format; /* Format identifier--format = 1 */ - INT16 xCoordinate; /* Horizontal value--in design units */ - INT16 yCoordinate; /* Vertical value--in design units */ - public: - DEFINE_SIZE_STATIC (6); -}; - -struct AnchorFormat2 -{ - inline void get_anchor (hb_apply_context_t *c, hb_codepoint_t glyph_id, - hb_position_t *x, hb_position_t *y) const - { - hb_font_t *font = c->font; - unsigned int x_ppem = font->x_ppem; - unsigned int y_ppem = font->y_ppem; - hb_position_t cx, cy; - hb_bool_t ret; - - ret = (x_ppem || y_ppem) && - font->get_glyph_contour_point_for_origin (glyph_id, anchorPoint, HB_DIRECTION_LTR, &cx, &cy); - *x = ret && x_ppem ? cx : font->em_scale_x (xCoordinate); - *y = ret && y_ppem ? cy : font->em_scale_y (yCoordinate); - } - - inline bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - return_trace (c->check_struct (this)); - } - - protected: - UINT16 format; /* Format identifier--format = 2 */ - INT16 xCoordinate; /* Horizontal value--in design units */ - INT16 yCoordinate; /* Vertical value--in design units */ - UINT16 anchorPoint; /* Index to glyph contour point */ - public: - DEFINE_SIZE_STATIC (8); -}; - -struct AnchorFormat3 -{ - inline void get_anchor (hb_apply_context_t *c, hb_codepoint_t glyph_id HB_UNUSED, - hb_position_t *x, hb_position_t *y) const - { - hb_font_t *font = c->font; - *x = font->em_scale_x (xCoordinate); - *y = font->em_scale_y (yCoordinate); - - if (font->x_ppem || font->num_coords) - *x += (this+xDeviceTable).get_x_delta (font, c->var_store); - if (font->y_ppem || font->num_coords) - *y += (this+yDeviceTable).get_y_delta (font, c->var_store); - } - - inline bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - return_trace (c->check_struct (this) && xDeviceTable.sanitize (c, this) && yDeviceTable.sanitize (c, this)); - } - - protected: - UINT16 format; /* Format identifier--format = 3 */ - INT16 xCoordinate; /* Horizontal value--in design units */ - INT16 yCoordinate; /* Vertical value--in design units */ - OffsetTo<Device> - xDeviceTable; /* Offset to Device table for X - * coordinate-- from beginning of - * Anchor table (may be NULL) */ - OffsetTo<Device> - yDeviceTable; /* Offset to Device table for Y - * coordinate-- from beginning of - * Anchor table (may be NULL) */ - public: - DEFINE_SIZE_STATIC (10); -}; - -struct Anchor -{ - inline void get_anchor (hb_apply_context_t *c, hb_codepoint_t glyph_id, - hb_position_t *x, hb_position_t *y) const - { - *x = *y = 0; - switch (u.format) { - case 1: u.format1.get_anchor (c, glyph_id, x, y); return; - case 2: u.format2.get_anchor (c, glyph_id, x, y); return; - case 3: u.format3.get_anchor (c, glyph_id, x, y); return; - default: return; - } - } - - inline bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - if (!u.format.sanitize (c)) return_trace (false); - switch (u.format) { - 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); - } - } - - protected: - union { - UINT16 format; /* Format identifier */ - AnchorFormat1 format1; - AnchorFormat2 format2; - AnchorFormat3 format3; - } u; - public: - DEFINE_SIZE_UNION (2, format); -}; - - -struct AnchorMatrix -{ - inline const Anchor& get_anchor (unsigned int row, unsigned int col, unsigned int cols, bool *found) const { - *found = false; - if (unlikely (row >= rows || col >= cols)) return Null(Anchor); - *found = !matrixZ[row * cols + col].is_null (); - return this+matrixZ[row * cols + col]; - } - - inline bool sanitize (hb_sanitize_context_t *c, unsigned int cols) const - { - TRACE_SANITIZE (this); - if (!c->check_struct (this)) return_trace (false); - if (unlikely (_hb_unsigned_int_mul_overflows (rows, cols))) return_trace (false); - unsigned int count = rows * cols; - if (!c->check_array (matrixZ, matrixZ[0].static_size, count)) return_trace (false); - for (unsigned int i = 0; i < count; i++) - if (!matrixZ[i].sanitize (c, this)) return_trace (false); - return_trace (true); - } - - UINT16 rows; /* Number of rows */ - protected: - OffsetTo<Anchor> - matrixZ[VAR]; /* Matrix of offsets to Anchor tables-- - * from beginning of AnchorMatrix table */ - public: - DEFINE_SIZE_ARRAY (2, matrixZ); -}; - - -struct MarkRecord -{ - friend struct MarkArray; - - inline bool sanitize (hb_sanitize_context_t *c, const void *base) const - { - TRACE_SANITIZE (this); - return_trace (c->check_struct (this) && markAnchor.sanitize (c, base)); - } - - protected: - UINT16 klass; /* Class defined for this mark */ - OffsetTo<Anchor> - markAnchor; /* Offset to Anchor table--from - * beginning of MarkArray table */ - public: - DEFINE_SIZE_STATIC (4); -}; - -struct MarkArray : ArrayOf<MarkRecord> /* Array of MarkRecords--in Coverage order */ -{ - inline bool apply (hb_apply_context_t *c, - unsigned int mark_index, unsigned int glyph_index, - const AnchorMatrix &anchors, unsigned int class_count, - unsigned int glyph_pos) const - { - TRACE_APPLY (this); - hb_buffer_t *buffer = c->buffer; - const MarkRecord &record = ArrayOf<MarkRecord>::operator[](mark_index); - unsigned int mark_class = record.klass; - - const Anchor& mark_anchor = this + record.markAnchor; - bool found; - const Anchor& glyph_anchor = anchors.get_anchor (glyph_index, mark_class, class_count, &found); - /* If this subtable doesn't have an anchor for this base and this class, - * return false such that the subsequent subtables have a chance at it. */ - if (unlikely (!found)) return_trace (false); - - hb_position_t mark_x, mark_y, base_x, base_y; - - buffer->unsafe_to_break (glyph_pos, buffer->idx); - mark_anchor.get_anchor (c, buffer->cur().codepoint, &mark_x, &mark_y); - glyph_anchor.get_anchor (c, buffer->info[glyph_pos].codepoint, &base_x, &base_y); - - hb_glyph_position_t &o = buffer->cur_pos(); - o.x_offset = base_x - mark_x; - o.y_offset = base_y - mark_y; - 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; - - buffer->idx++; - return_trace (true); - } - - inline bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - return_trace (ArrayOf<MarkRecord>::sanitize (c, this)); - } -}; - - -/* Lookups */ - -struct SinglePosFormat1 -{ - inline void collect_glyphs (hb_collect_glyphs_context_t *c) const - { - TRACE_COLLECT_GLYPHS (this); - if (unlikely (!(this+coverage).add_coverage (c->input))) return; - } - - inline const Coverage &get_coverage (void) const - { - return this+coverage; - } - - inline bool apply (hb_apply_context_t *c) const - { - TRACE_APPLY (this); - hb_buffer_t *buffer = c->buffer; - unsigned int index = (this+coverage).get_coverage (buffer->cur().codepoint); - if (likely (index == NOT_COVERED)) return_trace (false); - - valueFormat.apply_value (c, this, values, buffer->cur_pos()); - - buffer->idx++; - return_trace (true); - } - - inline bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - return_trace (c->check_struct (this) && - coverage.sanitize (c, this) && - valueFormat.sanitize_value (c, this, values)); - } - - protected: - UINT16 format; /* Format identifier--format = 1 */ - OffsetTo<Coverage> - coverage; /* Offset to Coverage table--from - * beginning of subtable */ - ValueFormat valueFormat; /* Defines the types of data in the - * ValueRecord */ - ValueRecord values; /* Defines positioning - * value(s)--applied to all glyphs in - * the Coverage table */ - public: - DEFINE_SIZE_ARRAY (6, values); -}; - -struct SinglePosFormat2 -{ - inline void collect_glyphs (hb_collect_glyphs_context_t *c) const - { - TRACE_COLLECT_GLYPHS (this); - if (unlikely (!(this+coverage).add_coverage (c->input))) return; - } - - inline const Coverage &get_coverage (void) const - { - return this+coverage; - } - - inline bool apply (hb_apply_context_t *c) const - { - TRACE_APPLY (this); - hb_buffer_t *buffer = c->buffer; - unsigned int index = (this+coverage).get_coverage (buffer->cur().codepoint); - if (likely (index == NOT_COVERED)) return_trace (false); - - if (likely (index >= valueCount)) return_trace (false); - - valueFormat.apply_value (c, this, - &values[index * valueFormat.get_len ()], - buffer->cur_pos()); - - buffer->idx++; - return_trace (true); - } - - inline bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - return_trace (c->check_struct (this) && - coverage.sanitize (c, this) && - valueFormat.sanitize_values (c, this, values, valueCount)); - } - - protected: - UINT16 format; /* Format identifier--format = 2 */ - OffsetTo<Coverage> - coverage; /* Offset to Coverage table--from - * beginning of subtable */ - ValueFormat valueFormat; /* Defines the types of data in the - * ValueRecord */ - UINT16 valueCount; /* Number of ValueRecords */ - ValueRecord values; /* Array of ValueRecords--positioning - * values applied to glyphs */ - public: - DEFINE_SIZE_ARRAY (8, values); -}; - -struct SinglePos -{ - 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 (c->dispatch (u.format1)); - case 2: return_trace (c->dispatch (u.format2)); - default:return_trace (c->default_return_value ()); - } - } - - protected: - union { - UINT16 format; /* Format identifier */ - SinglePosFormat1 format1; - SinglePosFormat2 format2; - } u; -}; - - -struct PairValueRecord -{ - friend struct PairSet; - - protected: - GlyphID secondGlyph; /* GlyphID of second glyph in the - * pair--first glyph is listed in the - * Coverage table */ - ValueRecord values; /* Positioning data for the first glyph - * followed by for second glyph */ - public: - DEFINE_SIZE_ARRAY (2, values); -}; - -struct PairSet -{ - friend struct PairPosFormat1; - - inline void collect_glyphs (hb_collect_glyphs_context_t *c, - const ValueFormat *valueFormats) const - { - TRACE_COLLECT_GLYPHS (this); - unsigned int len1 = valueFormats[0].get_len (); - unsigned int len2 = valueFormats[1].get_len (); - unsigned int record_size = UINT16::static_size * (1 + len1 + len2); - - const PairValueRecord *record = CastP<PairValueRecord> (arrayZ); - c->input->add_array (&record->secondGlyph, len, record_size); - } - - inline bool apply (hb_apply_context_t *c, - const ValueFormat *valueFormats, - unsigned int pos) const - { - TRACE_APPLY (this); - hb_buffer_t *buffer = c->buffer; - unsigned int len1 = valueFormats[0].get_len (); - unsigned int len2 = valueFormats[1].get_len (); - unsigned int record_size = UINT16::static_size * (1 + len1 + len2); - - const PairValueRecord *record_array = CastP<PairValueRecord> (arrayZ); - unsigned int count = len; - - /* Hand-coded bsearch. */ - if (unlikely (!count)) - return_trace (false); - hb_codepoint_t x = buffer->info[pos].codepoint; - int min = 0, max = (int) count - 1; - while (min <= max) - { - int mid = (min + max) / 2; - const PairValueRecord *record = &StructAtOffset<PairValueRecord> (record_array, record_size * mid); - hb_codepoint_t mid_x = record->secondGlyph; - if (x < mid_x) - max = mid - 1; - else if (x > mid_x) - min = mid + 1; - else - { - buffer->unsafe_to_break (buffer->idx, pos + 1); - valueFormats[0].apply_value (c, this, &record->values[0], buffer->cur_pos()); - valueFormats[1].apply_value (c, this, &record->values[len1], buffer->pos[pos]); - if (len2) - pos++; - buffer->idx = pos; - return_trace (true); - } - } - - return_trace (false); - } - - struct sanitize_closure_t { - const void *base; - const ValueFormat *valueFormats; - unsigned int len1; /* valueFormats[0].get_len() */ - unsigned int stride; /* 1 + len1 + len2 */ - }; - - inline bool sanitize (hb_sanitize_context_t *c, const sanitize_closure_t *closure) const - { - TRACE_SANITIZE (this); - if (!(c->check_struct (this) - && c->check_array (arrayZ, UINT16::static_size * closure->stride, len))) return_trace (false); - - unsigned int count = len; - const PairValueRecord *record = CastP<PairValueRecord> (arrayZ); - return_trace (closure->valueFormats[0].sanitize_values_stride_unsafe (c, closure->base, &record->values[0], count, closure->stride) && - closure->valueFormats[1].sanitize_values_stride_unsafe (c, closure->base, &record->values[closure->len1], count, closure->stride)); - } - - protected: - UINT16 len; /* Number of PairValueRecords */ - UINT16 arrayZ[VAR]; /* Array of PairValueRecords--ordered - * by GlyphID of the second glyph */ - public: - DEFINE_SIZE_ARRAY (2, arrayZ); -}; - -struct PairPosFormat1 -{ - inline void collect_glyphs (hb_collect_glyphs_context_t *c) const - { - TRACE_COLLECT_GLYPHS (this); - if (unlikely (!(this+coverage).add_coverage (c->input))) return; - unsigned int count = pairSet.len; - for (unsigned int i = 0; i < count; i++) - (this+pairSet[i]).collect_glyphs (c, valueFormat); - } - - inline const Coverage &get_coverage (void) const - { - return this+coverage; - } - - inline bool apply (hb_apply_context_t *c) const - { - TRACE_APPLY (this); - hb_buffer_t *buffer = c->buffer; - unsigned int index = (this+coverage).get_coverage (buffer->cur().codepoint); - if (likely (index == NOT_COVERED)) return_trace (false); - - hb_apply_context_t::skipping_iterator_t &skippy_iter = c->iter_input; - skippy_iter.reset (buffer->idx, 1); - if (!skippy_iter.next ()) return_trace (false); - - return_trace ((this+pairSet[index]).apply (c, valueFormat, skippy_iter.idx)); - } - - inline bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - - if (!c->check_struct (this)) return_trace (false); - - unsigned int len1 = valueFormat[0].get_len (); - unsigned int len2 = valueFormat[1].get_len (); - PairSet::sanitize_closure_t closure = { - this, - valueFormat, - len1, - 1 + len1 + len2 - }; - - return_trace (coverage.sanitize (c, this) && pairSet.sanitize (c, this, &closure)); - } - - protected: - UINT16 format; /* Format identifier--format = 1 */ - OffsetTo<Coverage> - coverage; /* Offset to Coverage table--from - * beginning of subtable */ - ValueFormat valueFormat[2]; /* [0] Defines the types of data in - * ValueRecord1--for the first glyph - * in the pair--may be zero (0) */ - /* [1] Defines the types of data in - * ValueRecord2--for the second glyph - * in the pair--may be zero (0) */ - OffsetArrayOf<PairSet> - pairSet; /* Array of PairSet tables - * ordered by Coverage Index */ - public: - DEFINE_SIZE_ARRAY (10, pairSet); -}; - -struct PairPosFormat2 -{ - inline void collect_glyphs (hb_collect_glyphs_context_t *c) const - { - TRACE_COLLECT_GLYPHS (this); - if (unlikely (!(this+coverage).add_coverage (c->input))) return; - if (unlikely (!(this+classDef2).add_coverage (c->input))) return; - } - - inline const Coverage &get_coverage (void) const - { - return this+coverage; - } - - inline bool apply (hb_apply_context_t *c) const - { - TRACE_APPLY (this); - hb_buffer_t *buffer = c->buffer; - unsigned int index = (this+coverage).get_coverage (buffer->cur().codepoint); - if (likely (index == NOT_COVERED)) return_trace (false); - - hb_apply_context_t::skipping_iterator_t &skippy_iter = c->iter_input; - skippy_iter.reset (buffer->idx, 1); - if (!skippy_iter.next ()) return_trace (false); - - unsigned int len1 = valueFormat1.get_len (); - unsigned int len2 = valueFormat2.get_len (); - unsigned int record_len = len1 + len2; - - unsigned int klass1 = (this+classDef1).get_class (buffer->cur().codepoint); - unsigned int klass2 = (this+classDef2).get_class (buffer->info[skippy_iter.idx].codepoint); - if (unlikely (klass1 >= class1Count || klass2 >= class2Count)) return_trace (false); - - buffer->unsafe_to_break (buffer->idx, skippy_iter.idx + 1); - const Value *v = &values[record_len * (klass1 * class2Count + klass2)]; - valueFormat1.apply_value (c, this, v, buffer->cur_pos()); - valueFormat2.apply_value (c, this, v + len1, buffer->pos[skippy_iter.idx]); - - buffer->idx = skippy_iter.idx; - if (len2) - buffer->idx++; - - return_trace (true); - } - - inline bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - if (!(c->check_struct (this) - && coverage.sanitize (c, this) - && classDef1.sanitize (c, this) - && classDef2.sanitize (c, this))) return_trace (false); - - unsigned int len1 = valueFormat1.get_len (); - unsigned int len2 = valueFormat2.get_len (); - unsigned int stride = len1 + len2; - unsigned int record_size = valueFormat1.get_size () + valueFormat2.get_size (); - unsigned int count = (unsigned int) class1Count * (unsigned int) class2Count; - return_trace (c->check_array (values, record_size, count) && - valueFormat1.sanitize_values_stride_unsafe (c, this, &values[0], count, stride) && - valueFormat2.sanitize_values_stride_unsafe (c, this, &values[len1], count, stride)); - } - - protected: - UINT16 format; /* Format identifier--format = 2 */ - OffsetTo<Coverage> - coverage; /* Offset to Coverage table--from - * beginning of subtable */ - ValueFormat valueFormat1; /* ValueRecord definition--for the - * first glyph of the pair--may be zero - * (0) */ - ValueFormat valueFormat2; /* ValueRecord definition--for the - * second glyph of the pair--may be - * zero (0) */ - OffsetTo<ClassDef> - classDef1; /* Offset to ClassDef table--from - * beginning of PairPos subtable--for - * the first glyph of the pair */ - OffsetTo<ClassDef> - classDef2; /* Offset to ClassDef table--from - * beginning of PairPos subtable--for - * the second glyph of the pair */ - UINT16 class1Count; /* Number of classes in ClassDef1 - * table--includes Class0 */ - UINT16 class2Count; /* Number of classes in ClassDef2 - * table--includes Class0 */ - ValueRecord values; /* Matrix of value pairs: - * class1-major, class2-minor, - * Each entry has value1 and value2 */ - public: - DEFINE_SIZE_ARRAY (16, values); -}; - -struct PairPos -{ - 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 (c->dispatch (u.format1)); - case 2: return_trace (c->dispatch (u.format2)); - default:return_trace (c->default_return_value ()); - } - } - - protected: - union { - UINT16 format; /* Format identifier */ - PairPosFormat1 format1; - PairPosFormat2 format2; - } u; -}; - - -struct EntryExitRecord -{ - friend struct CursivePosFormat1; - - inline bool sanitize (hb_sanitize_context_t *c, const void *base) const - { - TRACE_SANITIZE (this); - return_trace (entryAnchor.sanitize (c, base) && exitAnchor.sanitize (c, base)); - } - - protected: - OffsetTo<Anchor> - entryAnchor; /* Offset to EntryAnchor table--from - * beginning of CursivePos - * subtable--may be NULL */ - OffsetTo<Anchor> - exitAnchor; /* Offset to ExitAnchor table--from - * beginning of CursivePos - * subtable--may be NULL */ - public: - DEFINE_SIZE_STATIC (4); -}; - -static void -reverse_cursive_minor_offset (hb_glyph_position_t *pos, unsigned int i, hb_direction_t direction, unsigned int new_parent); - -struct CursivePosFormat1 -{ - inline void collect_glyphs (hb_collect_glyphs_context_t *c) const - { - TRACE_COLLECT_GLYPHS (this); - if (unlikely (!(this+coverage).add_coverage (c->input))) return; - } - - inline const Coverage &get_coverage (void) const - { - return this+coverage; - } - - inline bool apply (hb_apply_context_t *c) const - { - TRACE_APPLY (this); - hb_buffer_t *buffer = c->buffer; - - const EntryExitRecord &this_record = entryExitRecord[(this+coverage).get_coverage (buffer->cur().codepoint)]; - if (!this_record.exitAnchor) return_trace (false); - - hb_apply_context_t::skipping_iterator_t &skippy_iter = c->iter_input; - skippy_iter.reset (buffer->idx, 1); - if (!skippy_iter.next ()) return_trace (false); - - const EntryExitRecord &next_record = entryExitRecord[(this+coverage).get_coverage (buffer->info[skippy_iter.idx].codepoint)]; - if (!next_record.entryAnchor) return_trace (false); - - unsigned int i = buffer->idx; - unsigned int j = skippy_iter.idx; - - buffer->unsafe_to_break (i, j); - hb_position_t entry_x, entry_y, exit_x, exit_y; - (this+this_record.exitAnchor).get_anchor (c, buffer->info[i].codepoint, &exit_x, &exit_y); - (this+next_record.entryAnchor).get_anchor (c, buffer->info[j].codepoint, &entry_x, &entry_y); - - hb_glyph_position_t *pos = buffer->pos; - - hb_position_t d; - /* Main-direction adjustment */ - switch (c->direction) { - case HB_DIRECTION_LTR: - pos[i].x_advance = exit_x + pos[i].x_offset; - - d = entry_x + pos[j].x_offset; - pos[j].x_advance -= d; - pos[j].x_offset -= d; - break; - case HB_DIRECTION_RTL: - d = exit_x + pos[i].x_offset; - pos[i].x_advance -= d; - pos[i].x_offset -= d; - - pos[j].x_advance = entry_x + pos[j].x_offset; - break; - case HB_DIRECTION_TTB: - pos[i].y_advance = exit_y + pos[i].y_offset; - - d = entry_y + pos[j].y_offset; - pos[j].y_advance -= d; - pos[j].y_offset -= d; - break; - case HB_DIRECTION_BTT: - d = exit_y + pos[i].y_offset; - pos[i].y_advance -= d; - pos[i].y_offset -= d; - - pos[j].y_advance = entry_y; - break; - case HB_DIRECTION_INVALID: - default: - break; - } - - /* Cross-direction adjustment */ - - /* We attach child to parent (think graph theory and rooted trees whereas - * the root stays on baseline and each node aligns itself against its - * parent. - * - * Optimize things for the case of RightToLeft, as that's most common in - * Arabinc. */ - unsigned int child = i; - unsigned int parent = j; - hb_position_t x_offset = entry_x - exit_x; - hb_position_t y_offset = entry_y - exit_y; - if (!(c->lookup_props & LookupFlag::RightToLeft)) - { - unsigned int k = child; - child = parent; - parent = k; - x_offset = -x_offset; - y_offset = -y_offset; - } - - /* If child was already connected to someone else, walk through its old - * chain and reverse the link direction, such that the whole tree of its - * previous connection now attaches to new parent. Watch out for case - * where new parent is on the path from old chain... - */ - reverse_cursive_minor_offset (pos, child, c->direction, parent); - - 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 - pos[child].x_offset = x_offset; - - buffer->idx = j; - return_trace (true); - } - - inline bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - return_trace (coverage.sanitize (c, this) && entryExitRecord.sanitize (c, this)); - } - - protected: - UINT16 format; /* Format identifier--format = 1 */ - OffsetTo<Coverage> - coverage; /* Offset to Coverage table--from - * beginning of subtable */ - ArrayOf<EntryExitRecord> - entryExitRecord; /* Array of EntryExit records--in - * Coverage Index order */ - public: - DEFINE_SIZE_ARRAY (6, entryExitRecord); -}; - -struct CursivePos -{ - 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 (c->dispatch (u.format1)); - default:return_trace (c->default_return_value ()); - } - } - - protected: - union { - UINT16 format; /* Format identifier */ - CursivePosFormat1 format1; - } u; -}; - - -typedef AnchorMatrix BaseArray; /* base-major-- - * in order of BaseCoverage Index--, - * mark-minor-- - * ordered by class--zero-based. */ - -struct MarkBasePosFormat1 -{ - inline void collect_glyphs (hb_collect_glyphs_context_t *c) const - { - TRACE_COLLECT_GLYPHS (this); - if (unlikely (!(this+markCoverage).add_coverage (c->input))) return; - if (unlikely (!(this+baseCoverage).add_coverage (c->input))) return; - } - - inline const Coverage &get_coverage (void) const - { - return this+markCoverage; - } - - inline bool apply (hb_apply_context_t *c) const - { - TRACE_APPLY (this); - hb_buffer_t *buffer = c->buffer; - 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 */ - 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); - do { - if (!skippy_iter.prev ()) return_trace (false); - /* We only want to attach to the first of a MultipleSubst sequence. Reject others. */ - if (!_hb_glyph_info_multiplied (&buffer->info[skippy_iter.idx]) || - 0 == _hb_glyph_info_get_lig_comp (&buffer->info[skippy_iter.idx])) - break; - skippy_iter.reject (); - } 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); } - - unsigned int base_index = (this+baseCoverage).get_coverage (buffer->info[skippy_iter.idx].codepoint); - if (base_index == NOT_COVERED) return_trace (false); - - return_trace ((this+markArray).apply (c, mark_index, base_index, this+baseArray, classCount, skippy_iter.idx)); - } - - inline bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - return_trace (c->check_struct (this) && - markCoverage.sanitize (c, this) && - baseCoverage.sanitize (c, this) && - markArray.sanitize (c, this) && - baseArray.sanitize (c, this, (unsigned int) classCount)); - } - - protected: - UINT16 format; /* Format identifier--format = 1 */ - OffsetTo<Coverage> - markCoverage; /* Offset to MarkCoverage table--from - * beginning of MarkBasePos subtable */ - OffsetTo<Coverage> - baseCoverage; /* Offset to BaseCoverage table--from - * beginning of MarkBasePos subtable */ - UINT16 classCount; /* Number of classes defined for marks */ - OffsetTo<MarkArray> - markArray; /* Offset to MarkArray table--from - * beginning of MarkBasePos subtable */ - OffsetTo<BaseArray> - baseArray; /* Offset to BaseArray table--from - * beginning of MarkBasePos subtable */ - public: - DEFINE_SIZE_STATIC (12); -}; - -struct MarkBasePos -{ - 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 (c->dispatch (u.format1)); - default:return_trace (c->default_return_value ()); - } - } - - protected: - union { - UINT16 format; /* Format identifier */ - MarkBasePosFormat1 format1; - } u; -}; - - -typedef AnchorMatrix LigatureAttach; /* component-major-- - * in order of writing direction--, - * mark-minor-- - * ordered by class--zero-based. */ - -typedef OffsetListOf<LigatureAttach> LigatureArray; - /* Array of LigatureAttach - * tables ordered by - * LigatureCoverage Index */ - -struct MarkLigPosFormat1 -{ - inline void collect_glyphs (hb_collect_glyphs_context_t *c) const - { - TRACE_COLLECT_GLYPHS (this); - if (unlikely (!(this+markCoverage).add_coverage (c->input))) return; - if (unlikely (!(this+ligatureCoverage).add_coverage (c->input))) return; - } - - inline const Coverage &get_coverage (void) const - { - return this+markCoverage; - } - - inline bool apply (hb_apply_context_t *c) const - { - TRACE_APPLY (this); - hb_buffer_t *buffer = c->buffer; - 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 */ - 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); } - - unsigned int j = skippy_iter.idx; - unsigned int lig_index = (this+ligatureCoverage).get_coverage (buffer->info[j].codepoint); - if (lig_index == NOT_COVERED) return_trace (false); - - const LigatureArray& lig_array = this+ligatureArray; - const LigatureAttach& lig_attach = lig_array[lig_index]; - - /* Find component to attach to */ - unsigned int comp_count = lig_attach.rows; - if (unlikely (!comp_count)) return_trace (false); - - /* We must now check whether the ligature ID of the current mark glyph - * is identical to the ligature ID of the found ligature. If yes, we - * can directly use the component index. If not, we attach the mark - * glyph to the last component of the ligature. */ - unsigned int comp_index; - unsigned int lig_id = _hb_glyph_info_get_lig_id (&buffer->info[j]); - unsigned int mark_id = _hb_glyph_info_get_lig_id (&buffer->cur()); - unsigned int mark_comp = _hb_glyph_info_get_lig_comp (&buffer->cur()); - if (lig_id && lig_id == mark_id && mark_comp > 0) - comp_index = MIN (comp_count, _hb_glyph_info_get_lig_comp (&buffer->cur())) - 1; - else - comp_index = comp_count - 1; - - return_trace ((this+markArray).apply (c, mark_index, comp_index, lig_attach, classCount, j)); - } - - inline bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - return_trace (c->check_struct (this) && - markCoverage.sanitize (c, this) && - ligatureCoverage.sanitize (c, this) && - markArray.sanitize (c, this) && - ligatureArray.sanitize (c, this, (unsigned int) classCount)); - } - - protected: - UINT16 format; /* Format identifier--format = 1 */ - OffsetTo<Coverage> - markCoverage; /* Offset to Mark Coverage table--from - * beginning of MarkLigPos subtable */ - OffsetTo<Coverage> - ligatureCoverage; /* Offset to Ligature Coverage - * table--from beginning of MarkLigPos - * subtable */ - UINT16 classCount; /* Number of defined mark classes */ - OffsetTo<MarkArray> - markArray; /* Offset to MarkArray table--from - * beginning of MarkLigPos subtable */ - OffsetTo<LigatureArray> - ligatureArray; /* Offset to LigatureArray table--from - * beginning of MarkLigPos subtable */ - public: - DEFINE_SIZE_STATIC (12); -}; - -struct MarkLigPos -{ - 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 (c->dispatch (u.format1)); - default:return_trace (c->default_return_value ()); - } - } - - protected: - union { - UINT16 format; /* Format identifier */ - MarkLigPosFormat1 format1; - } u; -}; - - -typedef AnchorMatrix Mark2Array; /* mark2-major-- - * in order of Mark2Coverage Index--, - * mark1-minor-- - * ordered by class--zero-based. */ - -struct MarkMarkPosFormat1 -{ - inline void collect_glyphs (hb_collect_glyphs_context_t *c) const - { - TRACE_COLLECT_GLYPHS (this); - if (unlikely (!(this+mark1Coverage).add_coverage (c->input))) return; - if (unlikely (!(this+mark2Coverage).add_coverage (c->input))) return; - } - - inline const Coverage &get_coverage (void) const - { - return this+mark1Coverage; - } - - inline bool apply (hb_apply_context_t *c) const - { - TRACE_APPLY (this); - hb_buffer_t *buffer = c->buffer; - unsigned int mark1_index = (this+mark1Coverage).get_coverage (buffer->cur().codepoint); - if (likely (mark1_index == NOT_COVERED)) return_trace (false); - - /* now we search backwards for a suitable mark glyph until 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 (c->lookup_props & ~LookupFlag::IgnoreFlags); - if (!skippy_iter.prev ()) return_trace (false); - - if (!_hb_glyph_info_is_mark (&buffer->info[skippy_iter.idx])) { return_trace (false); } - - unsigned int j = skippy_iter.idx; - - unsigned int id1 = _hb_glyph_info_get_lig_id (&buffer->cur()); - unsigned int id2 = _hb_glyph_info_get_lig_id (&buffer->info[j]); - unsigned int comp1 = _hb_glyph_info_get_lig_comp (&buffer->cur()); - unsigned int comp2 = _hb_glyph_info_get_lig_comp (&buffer->info[j]); - - if (likely (id1 == id2)) { - if (id1 == 0) /* Marks belonging to the same base. */ - goto good; - else if (comp1 == comp2) /* Marks belonging to the same ligature component. */ - goto good; - } else { - /* If ligature ids don't match, it may be the case that one of the marks - * itself is a ligature. In which case match. */ - if ((id1 > 0 && !comp1) || (id2 > 0 && !comp2)) - goto good; - } - - /* Didn't match. */ - return_trace (false); - - good: - unsigned int mark2_index = (this+mark2Coverage).get_coverage (buffer->info[j].codepoint); - if (mark2_index == NOT_COVERED) return_trace (false); - - return_trace ((this+mark1Array).apply (c, mark1_index, mark2_index, this+mark2Array, classCount, j)); - } - - inline bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - return_trace (c->check_struct (this) && - mark1Coverage.sanitize (c, this) && - mark2Coverage.sanitize (c, this) && - mark1Array.sanitize (c, this) && - mark2Array.sanitize (c, this, (unsigned int) classCount)); - } - - protected: - UINT16 format; /* Format identifier--format = 1 */ - OffsetTo<Coverage> - mark1Coverage; /* Offset to Combining Mark1 Coverage - * table--from beginning of MarkMarkPos - * subtable */ - OffsetTo<Coverage> - mark2Coverage; /* Offset to Combining Mark2 Coverage - * table--from beginning of MarkMarkPos - * subtable */ - UINT16 classCount; /* Number of defined mark classes */ - OffsetTo<MarkArray> - mark1Array; /* Offset to Mark1Array table--from - * beginning of MarkMarkPos subtable */ - OffsetTo<Mark2Array> - mark2Array; /* Offset to Mark2Array table--from - * beginning of MarkMarkPos subtable */ - public: - DEFINE_SIZE_STATIC (12); -}; - -struct MarkMarkPos -{ - 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 (c->dispatch (u.format1)); - default:return_trace (c->default_return_value ()); - } - } - - protected: - union { - UINT16 format; /* Format identifier */ - MarkMarkPosFormat1 format1; - } u; -}; - - -struct ContextPos : Context {}; - -struct ChainContextPos : ChainContext {}; - -struct ExtensionPos : Extension<ExtensionPos> -{ - typedef struct PosLookupSubTable LookupSubTable; -}; - - - -/* - * PosLookup - */ - - -struct PosLookupSubTable -{ - friend struct PosLookup; - - enum Type { - Single = 1, - Pair = 2, - Cursive = 3, - MarkBase = 4, - MarkLig = 5, - MarkMark = 6, - Context = 7, - ChainContext = 8, - Extension = 9 - }; - - template <typename context_t> - inline typename context_t::return_t dispatch (context_t *c, unsigned int lookup_type) const - { - 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 (u.single.dispatch (c)); - case Pair: return_trace (u.pair.dispatch (c)); - case Cursive: return_trace (u.cursive.dispatch (c)); - case MarkBase: return_trace (u.markBase.dispatch (c)); - case MarkLig: return_trace (u.markLig.dispatch (c)); - case MarkMark: return_trace (u.markMark.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)); - default: return_trace (c->default_return_value ()); - } - } - - protected: - union { - UINT16 sub_format; - SinglePos single; - PairPos pair; - CursivePos cursive; - MarkBasePos markBase; - MarkLigPos markLig; - MarkMarkPos markMark; - ContextPos context; - ChainContextPos chainContext; - ExtensionPos extension; - } u; - public: - DEFINE_SIZE_UNION (2, sub_format); -}; - - -struct PosLookup : Lookup -{ - inline const PosLookupSubTable& get_subtable (unsigned int i) const - { return Lookup::get_subtable<PosLookupSubTable> (i); } - - inline bool is_reverse (void) const - { - return false; - } - - inline bool apply (hb_apply_context_t *c) const - { - TRACE_APPLY (this); - return_trace (dispatch (c)); - } - - inline hb_collect_glyphs_context_t::return_t collect_glyphs (hb_collect_glyphs_context_t *c) const - { - TRACE_COLLECT_GLYPHS (this); - return_trace (dispatch (c)); - } - - template <typename set_t> - inline void add_coverage (set_t *glyphs) const - { - hb_add_coverage_context_t<set_t> c (glyphs); - dispatch (&c); - } - - static bool apply_recurse_func (hb_apply_context_t *c, unsigned int lookup_index); - - 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<PosLookupSubTable> (c); } - - inline bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - if (unlikely (!Lookup::sanitize (c))) return_trace (false); - return_trace (dispatch (c)); - } -}; - -typedef OffsetListOf<PosLookup> PosLookupList; - -/* - * GPOS -- The Glyph Positioning Table - */ - -struct GPOS : GSUBGPOS -{ - static const hb_tag_t tableTag = HB_OT_TAG_GPOS; - - inline const PosLookup& get_lookup (unsigned int i) const - { 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_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 - { - TRACE_SANITIZE (this); - if (unlikely (!GSUBGPOS::sanitize (c))) return_trace (false); - const OffsetTo<PosLookupList> &list = CastR<OffsetTo<PosLookupList> > (lookupList); - return_trace (list.sanitize (c, this)); - } -}; - - -static void -reverse_cursive_minor_offset (hb_glyph_position_t *pos, unsigned int i, hb_direction_t direction, unsigned int new_parent) -{ - int chain = pos[i].attach_chain(), type = pos[i].attach_type(); - if (likely (!chain || 0 == (type & ATTACH_TYPE_CURSIVE))) - return; - - pos[i].attach_chain() = 0; - - unsigned int j = (int) i + chain; - - /* Stop if we see new parent in the chain. */ - if (j == new_parent) - return; - - reverse_cursive_minor_offset (pos, j, direction, new_parent); - - if (HB_DIRECTION_IS_HORIZONTAL (direction)) - pos[j].y_offset = -pos[i].y_offset; - else - pos[j].x_offset = -pos[i].x_offset; - - pos[j].attach_chain() = -chain; - pos[j].attach_type() = type; -} -static void -propagate_attachment_offsets (hb_glyph_position_t *pos, unsigned int i, hb_direction_t direction) -{ - /* 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; - - unsigned int j = (int) i + chain; - - pos[i].attach_chain() = 0; - - propagate_attachment_offsets (pos, j, direction); - - assert (!!(type & ATTACH_TYPE_MARK) ^ !!(type & ATTACH_TYPE_CURSIVE)); - - 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; - - assert (j < i); - 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; - } - } -} - -void -GPOS::position_start (hb_font_t *font HB_UNUSED, hb_buffer_t *buffer) -{ - unsigned int count = buffer->len; - for (unsigned int i = 0; i < count; i++) - buffer->pos[i].attach_chain() = buffer->pos[i].attach_type() = 0; -} - -void -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); - - unsigned int len; - hb_glyph_position_t *pos = hb_buffer_get_glyph_positions (buffer, &len); - hb_direction_t direction = buffer->props.direction; - - /* Handle attachments */ - if (buffer->scratch_flags & HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_ATTACHMENT) - for (unsigned int i = 0; i < len; i++) - propagate_attachment_offsets (pos, i, direction); -} - - +// TODO(garretrieger): Move into new layout directory. /* Out-of-class implementation for methods recursing */ - +#ifndef HB_NO_OT_LAYOUT template <typename context_t> -/*static*/ inline typename context_t::return_t PosLookup::dispatch_recurse_func (context_t *c, unsigned int lookup_index) +/*static*/ typename context_t::return_t PosLookup::dispatch_recurse_func (context_t *c, unsigned int lookup_index) { - const GPOS &gpos = *(hb_ot_layout_from_face (c->face)->gpos); - const PosLookup &l = gpos.get_lookup (lookup_index); + const PosLookup &l = c->face->table.GPOS.get_relaxed ()->table->get_lookup (lookup_index); return l.dispatch (c); } -/*static*/ inline bool PosLookup::apply_recurse_func (hb_apply_context_t *c, unsigned int lookup_index) +template <> +inline hb_closure_lookups_context_t::return_t +PosLookup::dispatch_recurse_func<hb_closure_lookups_context_t> (hb_closure_lookups_context_t *c, unsigned this_index) { - const GPOS &gpos = *(hb_ot_layout_from_face (c->face)->gpos); - const PosLookup &l = gpos.get_lookup (lookup_index); + const PosLookup &l = c->face->table.GPOS.get_relaxed ()->table->get_lookup (this_index); + return l.closure_lookups (c, this_index); +} + +template <> +inline bool PosLookup::dispatch_recurse_func<hb_ot_apply_context_t> (hb_ot_apply_context_t *c, unsigned int lookup_index) +{ + auto *gpos = c->face->table.GPOS.get_relaxed (); + const PosLookup &l = gpos->table->get_lookup (lookup_index); unsigned int saved_lookup_props = c->lookup_props; 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); + + bool ret = false; + auto *accel = gpos->get_accel (lookup_index); + ret = accel && accel->apply (c, l.get_subtable_count (), false); + c->set_lookup_index (saved_lookup_index); c->set_lookup_props (saved_lookup_props); return ret; } +#endif - -#undef attach_chain -#undef attach_type - - +} /* namespace GPOS_impl */ +} /* namespace Layout */ } /* namespace OT */ |