#ifndef HB_OT_LAYOUT_GPOS_TABLE_HH
#define HB_OT_LAYOUT_GPOS_TABLE_HH
-#include "hb-ot-layout-gsubgpos.hh"
-
-
-namespace OT {
-
-struct MarkArray;
-static void Markclass_closure_and_remap_indexes (const Coverage &mark_coverage,
- const MarkArray &mark_array,
- const hb_set_t &glyphset,
- hb_map_t* klass_mapping /* INOUT */);
-
-/* 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 HBUINT16 Value;
-
-typedef UnsizedArrayOf<Value> ValueRecord;
-
-struct ValueFormat : HBUINT16
-{
- 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
- HBINT16 xPlacement; /* Horizontal adjustment for
- * placement--in design units */
- HBINT16 yPlacement; /* Vertical adjustment for
- * placement--in design units */
- HBINT16 xAdvance; /* Horizontal adjustment for
- * advance--in design units (only used
- * for horizontal writing) */
- HBINT16 yAdvance; /* Vertical adjustment for advance--in
- * design units (only used for vertical
- * writing) */
- Offset16To<Device> xPlaDevice; /* Offset to Device table for
- * horizontal placement--measured from
- * beginning of PosTable (may be NULL) */
- Offset16To<Device> yPlaDevice; /* Offset to Device table for vertical
- * placement--measured from beginning
- * of PosTable (may be NULL) */
- Offset16To<Device> xAdvDevice; /* Offset to Device table for
- * horizontal advance--measured from
- * beginning of PosTable (may be NULL) */
- Offset16To<Device> yAdvDevice; /* Offset to Device table for vertical
- * advance--measured from beginning of
- * PosTable (may be NULL) */
-#endif
-
- IntType& operator = (uint16_t i) { v = i; return *this; }
-
- unsigned int get_len () const { return hb_popcount ((unsigned int) *this); }
- unsigned int get_size () const { return get_len () * Value::static_size; }
-
- bool apply_value (hb_ot_apply_context_t *c,
- const void *base,
- const Value *values,
- hb_glyph_position_t &glyph_pos) const
- {
- bool ret = false;
- unsigned int format = *this;
- if (!format) return ret;
-
- hb_font_t *font = c->font;
- bool horizontal =
-#ifndef HB_NO_VERTICAL
- HB_DIRECTION_IS_HORIZONTAL (c->direction)
-#else
- true
-#endif
- ;
-
- if (format & xPlacement) glyph_pos.x_offset += font->em_scale_x (get_short (values++, &ret));
- if (format & yPlacement) glyph_pos.y_offset += font->em_scale_y (get_short (values++, &ret));
- if (format & xAdvance) {
- if (likely (horizontal)) glyph_pos.x_advance += font->em_scale_x (get_short (values, &ret));
- 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, &ret));
- values++;
- }
-
- if (!has_device ()) return ret;
-
- 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 ret;
-
- const VariationStore &store = c->var_store;
-
- /* pixel -> fractional pixel */
- if (format & xPlaDevice) {
- if (use_x_device) glyph_pos.x_offset += (base + get_device (values, &ret)).get_x_delta (font, store);
- values++;
- }
- if (format & yPlaDevice) {
- if (use_y_device) glyph_pos.y_offset += (base + get_device (values, &ret)).get_y_delta (font, store);
- values++;
- }
- if (format & xAdvDevice) {
- if (horizontal && use_x_device) glyph_pos.x_advance += (base + get_device (values, &ret)).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, &ret)).get_y_delta (font, store);
- values++;
- }
- return ret;
- }
-
- unsigned int get_effective_format (const Value *values) const
- {
- unsigned int format = *this;
- for (unsigned flag = xPlacement; flag <= yAdvDevice; flag = flag << 1) {
- if (format & flag) should_drop (*values++, (Flags) flag, &format);
- }
-
- return format;
- }
-
- template<typename Iterator,
- hb_requires (hb_is_iterator (Iterator))>
- unsigned int get_effective_format (Iterator it) const {
- unsigned int new_format = 0;
-
- for (const hb_array_t<const Value>& values : it)
- new_format = new_format | get_effective_format (&values);
-
- return new_format;
- }
-
- void copy_values (hb_serialize_context_t *c,
- unsigned int new_format,
- const void *base,
- const Value *values,
- const hb_map_t *layout_variation_idx_map) const
- {
- unsigned int format = *this;
- if (!format) return;
-
- if (format & xPlacement) copy_value (c, new_format, xPlacement, *values++);
- if (format & yPlacement) copy_value (c, new_format, yPlacement, *values++);
- if (format & xAdvance) copy_value (c, new_format, xAdvance, *values++);
- if (format & yAdvance) copy_value (c, new_format, yAdvance, *values++);
-
- if (format & xPlaDevice) copy_device (c, base, values++, layout_variation_idx_map);
- if (format & yPlaDevice) copy_device (c, base, values++, layout_variation_idx_map);
- if (format & xAdvDevice) copy_device (c, base, values++, layout_variation_idx_map);
- if (format & yAdvDevice) copy_device (c, base, values++, layout_variation_idx_map);
- }
-
- void copy_value (hb_serialize_context_t *c,
- unsigned int new_format,
- Flags flag,
- Value value) const
- {
- // Filter by new format.
- if (!(new_format & flag)) return;
- c->copy (value);
- }
-
- void collect_variation_indices (hb_collect_variation_indices_context_t *c,
- const void *base,
- const hb_array_t<const Value>& values) const
- {
- unsigned format = *this;
- unsigned i = 0;
- if (format & xPlacement) i++;
- if (format & yPlacement) i++;
- if (format & xAdvance) i++;
- if (format & yAdvance) i++;
- if (format & xPlaDevice)
- {
- (base + get_device (&(values[i]))).collect_variation_indices (c->layout_variation_indices);
- i++;
- }
-
- if (format & ValueFormat::yPlaDevice)
- {
- (base + get_device (&(values[i]))).collect_variation_indices (c->layout_variation_indices);
- i++;
- }
-
- if (format & ValueFormat::xAdvDevice)
- {
-
- (base + get_device (&(values[i]))).collect_variation_indices (c->layout_variation_indices);
- i++;
- }
-
- if (format & ValueFormat::yAdvDevice)
- {
-
- (base + get_device (&(values[i]))).collect_variation_indices (c->layout_variation_indices);
- i++;
- }
- }
-
- private:
- 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 Offset16To<Device>& get_device (Value* value)
- {
- return *static_cast<Offset16To<Device> *> (value);
- }
- static inline const Offset16To<Device>& get_device (const Value* value, bool *worked=nullptr)
- {
- if (worked) *worked |= bool (*value);
- return *static_cast<const Offset16To<Device> *> (value);
- }
-
- bool copy_device (hb_serialize_context_t *c, const void *base,
- const Value *src_value, const hb_map_t *layout_variation_idx_map) const
- {
- Value *dst_value = c->copy (*src_value);
-
- if (!dst_value) return false;
- if (*dst_value == 0) return true;
-
- *dst_value = 0;
- c->push ();
- if ((base + get_device (src_value)).copy (c, layout_variation_idx_map))
- {
- c->add_link (*dst_value, c->pop_pack ());
- return true;
- }
- else
- {
- c->pop_discard ();
- return false;
- }
- }
-
- static inline const HBINT16& get_short (const Value* value, bool *worked=nullptr)
- {
- if (worked) *worked |= bool (*value);
- return *reinterpret_cast<const HBINT16 *> (value);
- }
-
- public:
-
- bool has_device () const
- {
- unsigned int format = *this;
- return (format & devices) != 0;
- }
-
- 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)));
- }
-
- 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_range (values, count, get_size ())) 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. */
- 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);
- }
-
- private:
-
- void should_drop (Value value, Flags flag, unsigned int* format) const
- {
- if (value) return;
- *format = *format & ~flag;
- }
-
-};
-
-template<typename Iterator, typename SrcLookup>
-static void SinglePos_serialize (hb_serialize_context_t *c,
- const SrcLookup *src,
- Iterator it,
- const hb_map_t *layout_variation_idx_map);
-
-
-struct AnchorFormat1
-{
- void get_anchor (hb_ot_apply_context_t *c, hb_codepoint_t glyph_id HB_UNUSED,
- float *x, float *y) const
- {
- hb_font_t *font = c->font;
- *x = font->em_fscale_x (xCoordinate);
- *y = font->em_fscale_y (yCoordinate);
- }
-
- bool sanitize (hb_sanitize_context_t *c) const
- {
- TRACE_SANITIZE (this);
- return_trace (c->check_struct (this));
- }
-
- AnchorFormat1* copy (hb_serialize_context_t *c) const
- {
- TRACE_SERIALIZE (this);
- AnchorFormat1* out = c->embed<AnchorFormat1> (this);
- if (!out) return_trace (out);
- out->format = 1;
- return_trace (out);
- }
-
- protected:
- HBUINT16 format; /* Format identifier--format = 1 */
- FWORD xCoordinate; /* Horizontal value--in design units */
- FWORD yCoordinate; /* Vertical value--in design units */
- public:
- DEFINE_SIZE_STATIC (6);
-};
-
-struct AnchorFormat2
-{
- void get_anchor (hb_ot_apply_context_t *c, hb_codepoint_t glyph_id,
- float *x, float *y) const
- {
- hb_font_t *font = c->font;
-
-#ifdef HB_NO_HINTING
- *x = font->em_fscale_x (xCoordinate);
- *y = font->em_fscale_y (yCoordinate);
- return;
-#endif
-
- unsigned int x_ppem = font->x_ppem;
- unsigned int y_ppem = font->y_ppem;
- hb_position_t cx = 0, cy = 0;
- bool 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_fscale_x (xCoordinate);
- *y = ret && y_ppem ? cy : font->em_fscale_y (yCoordinate);
- }
-
- bool sanitize (hb_sanitize_context_t *c) const
- {
- TRACE_SANITIZE (this);
- return_trace (c->check_struct (this));
- }
-
- AnchorFormat2* copy (hb_serialize_context_t *c) const
- {
- TRACE_SERIALIZE (this);
- return_trace (c->embed<AnchorFormat2> (this));
- }
-
- protected:
- HBUINT16 format; /* Format identifier--format = 2 */
- FWORD xCoordinate; /* Horizontal value--in design units */
- FWORD yCoordinate; /* Vertical value--in design units */
- HBUINT16 anchorPoint; /* Index to glyph contour point */
- public:
- DEFINE_SIZE_STATIC (8);
-};
-
-struct AnchorFormat3
-{
- void get_anchor (hb_ot_apply_context_t *c, hb_codepoint_t glyph_id HB_UNUSED,
- float *x, float *y) const
- {
- hb_font_t *font = c->font;
- *x = font->em_fscale_x (xCoordinate);
- *y = font->em_fscale_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);
- }
-
- 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));
- }
-
- AnchorFormat3* copy (hb_serialize_context_t *c,
- const hb_map_t *layout_variation_idx_map) const
- {
- TRACE_SERIALIZE (this);
- if (!layout_variation_idx_map) return_trace (nullptr);
-
- auto *out = c->embed<AnchorFormat3> (this);
- if (unlikely (!out)) return_trace (nullptr);
-
- out->xDeviceTable.serialize_copy (c, xDeviceTable, this, 0, hb_serialize_context_t::Head, layout_variation_idx_map);
- out->yDeviceTable.serialize_copy (c, yDeviceTable, this, 0, hb_serialize_context_t::Head, layout_variation_idx_map);
- return_trace (out);
- }
-
- void collect_variation_indices (hb_collect_variation_indices_context_t *c) const
- {
- (this+xDeviceTable).collect_variation_indices (c->layout_variation_indices);
- (this+yDeviceTable).collect_variation_indices (c->layout_variation_indices);
- }
-
- protected:
- HBUINT16 format; /* Format identifier--format = 3 */
- FWORD xCoordinate; /* Horizontal value--in design units */
- FWORD yCoordinate; /* Vertical value--in design units */
- Offset16To<Device>
- xDeviceTable; /* Offset to Device table for X
- * coordinate-- from beginning of
- * Anchor table (may be NULL) */
- Offset16To<Device>
- yDeviceTable; /* Offset to Device table for Y
- * coordinate-- from beginning of
- * Anchor table (may be NULL) */
- public:
- DEFINE_SIZE_STATIC (10);
-};
-
-struct Anchor
-{
- void get_anchor (hb_ot_apply_context_t *c, hb_codepoint_t glyph_id,
- float *x, float *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;
- }
- }
-
- 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);
- }
- }
-
- bool subset (hb_subset_context_t *c) const
- {
- TRACE_SUBSET (this);
- switch (u.format) {
- case 1: return_trace (bool (reinterpret_cast<Anchor *> (u.format1.copy (c->serializer))));
- case 2:
- if (c->plan->flags & HB_SUBSET_FLAGS_NO_HINTING)
- {
- // AnchorFormat 2 just containins extra hinting information, so
- // if hints are being dropped convert to format 1.
- return_trace (bool (reinterpret_cast<Anchor *> (u.format1.copy (c->serializer))));
- }
- return_trace (bool (reinterpret_cast<Anchor *> (u.format2.copy (c->serializer))));
- case 3: return_trace (bool (reinterpret_cast<Anchor *> (u.format3.copy (c->serializer,
- c->plan->layout_variation_idx_map))));
- default:return_trace (false);
- }
- }
-
- void collect_variation_indices (hb_collect_variation_indices_context_t *c) const
- {
- switch (u.format) {
- case 1: case 2:
- return;
- case 3:
- u.format3.collect_variation_indices (c);
- return;
- default: return;
- }
- }
-
- protected:
- union {
- HBUINT16 format; /* Format identifier */
- AnchorFormat1 format1;
- AnchorFormat2 format2;
- AnchorFormat3 format3;
- } u;
- public:
- DEFINE_SIZE_UNION (2, format);
-};
-
-
-struct AnchorMatrix
-{
- 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];
- }
-
- template <typename Iterator,
- hb_requires (hb_is_iterator (Iterator))>
- void collect_variation_indices (hb_collect_variation_indices_context_t *c,
- Iterator index_iter) const
- {
- for (unsigned i : index_iter)
- (this+matrixZ[i]).collect_variation_indices (c);
- }
-
- template <typename Iterator,
- hb_requires (hb_is_iterator (Iterator))>
- bool subset (hb_subset_context_t *c,
- unsigned num_rows,
- Iterator index_iter) const
- {
- TRACE_SUBSET (this);
-
- auto *out = c->serializer->start_embed (this);
-
- if (!index_iter) return_trace (false);
- if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
-
- out->rows = num_rows;
- for (const unsigned i : index_iter)
- {
- auto *offset = c->serializer->embed (matrixZ[i]);
- if (!offset) return_trace (false);
- offset->serialize_subset (c, matrixZ[i], this);
- }
-
- return_trace (true);
- }
-
- 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_mul_overflows (rows, cols))) return_trace (false);
- unsigned int count = rows * cols;
- if (!c->check_array (matrixZ.arrayZ, count)) return_trace (false);
- for (unsigned int i = 0; i < count; i++)
- if (!matrixZ[i].sanitize (c, this)) return_trace (false);
- return_trace (true);
- }
-
- HBUINT16 rows; /* Number of rows */
- UnsizedArrayOf<Offset16To<Anchor>>
- matrixZ; /* Matrix of offsets to Anchor tables--
- * from beginning of AnchorMatrix table */
- public:
- DEFINE_SIZE_ARRAY (2, matrixZ);
-};
-
-
-struct MarkRecord
-{
- friend struct MarkArray;
-
- unsigned get_class () const { return (unsigned) klass; }
- bool sanitize (hb_sanitize_context_t *c, const void *base) const
- {
- TRACE_SANITIZE (this);
- return_trace (c->check_struct (this) && markAnchor.sanitize (c, base));
- }
-
- MarkRecord *subset (hb_subset_context_t *c,
- const void *src_base,
- const hb_map_t *klass_mapping) const
- {
- TRACE_SUBSET (this);
- auto *out = c->serializer->embed (this);
- if (unlikely (!out)) return_trace (nullptr);
-
- out->klass = klass_mapping->get (klass);
- out->markAnchor.serialize_subset (c, markAnchor, src_base);
- return_trace (out);
- }
-
- void collect_variation_indices (hb_collect_variation_indices_context_t *c,
- const void *src_base) const
- {
- (src_base+markAnchor).collect_variation_indices (c);
- }
-
- protected:
- HBUINT16 klass; /* Class defined for this mark */
- Offset16To<Anchor>
- markAnchor; /* Offset to Anchor table--from
- * beginning of MarkArray table */
- public:
- DEFINE_SIZE_STATIC (4);
-};
-
-struct MarkArray : Array16Of<MarkRecord> /* Array of MarkRecords--in Coverage order */
-{
- bool apply (hb_ot_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 = Array16Of<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);
-
- float mark_x, mark_y, base_x, base_y;
-
- buffer->unsafe_to_break (glyph_pos, buffer->idx + 1);
- 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 = roundf (base_x - mark_x);
- o.y_offset = roundf (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);
- }
-
- template <typename Iterator,
- hb_requires (hb_is_iterator (Iterator))>
- bool subset (hb_subset_context_t *c,
- Iterator coverage,
- const hb_map_t *klass_mapping) const
- {
- TRACE_SUBSET (this);
- const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
-
- auto* out = c->serializer->start_embed (this);
- if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
-
- auto mark_iter =
- + hb_zip (coverage, this->iter ())
- | hb_filter (glyphset, hb_first)
- | hb_map (hb_second)
- ;
-
- unsigned new_length = 0;
- for (const auto& mark_record : mark_iter) {
- if (unlikely (!mark_record.subset (c, this, klass_mapping)))
- return_trace (false);
- new_length++;
- }
-
- if (unlikely (!c->serializer->check_assign (out->len, new_length,
- HB_SERIALIZE_ERROR_ARRAY_OVERFLOW)))
- return_trace (false);
-
- return_trace (true);
- }
-
- bool sanitize (hb_sanitize_context_t *c) const
- {
- TRACE_SANITIZE (this);
- return_trace (Array16Of<MarkRecord>::sanitize (c, this));
- }
-};
-
-
-/* Lookups */
-
-struct SinglePosFormat1
-{
- bool intersects (const hb_set_t *glyphs) const
- { return (this+coverage).intersects (glyphs); }
-
- void closure_lookups (hb_closure_lookups_context_t *c) const {}
- void collect_variation_indices (hb_collect_variation_indices_context_t *c) const
- {
- if (!valueFormat.has_device ()) return;
-
- auto it =
- + hb_iter (this+coverage)
- | hb_filter (c->glyph_set)
- ;
-
- if (!it) return;
- valueFormat.collect_variation_indices (c, this, values.as_array (valueFormat.get_len ()));
- }
-
- void collect_glyphs (hb_collect_glyphs_context_t *c) const
- { if (unlikely (!(this+coverage).collect_coverage (c->input))) return; }
-
- const Coverage &get_coverage () const { return this+coverage; }
-
- ValueFormat get_value_format () const { return valueFormat; }
-
- bool apply (hb_ot_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);
- }
-
- template<typename Iterator,
- typename SrcLookup,
- hb_requires (hb_is_iterator (Iterator))>
- void serialize (hb_serialize_context_t *c,
- const SrcLookup *src,
- Iterator it,
- ValueFormat newFormat,
- const hb_map_t *layout_variation_idx_map)
- {
- if (unlikely (!c->extend_min (this))) return;
- if (unlikely (!c->check_assign (valueFormat,
- newFormat,
- HB_SERIALIZE_ERROR_INT_OVERFLOW))) return;
-
- for (const hb_array_t<const Value>& _ : + it | hb_map (hb_second))
- {
- src->get_value_format ().copy_values (c, newFormat, src, &_, layout_variation_idx_map);
- // Only serialize the first entry in the iterator, the rest are assumed to
- // be the same.
- break;
- }
-
- auto glyphs =
- + it
- | hb_map_retains_sorting (hb_first)
- ;
-
- coverage.serialize_serialize (c, glyphs);
- }
-
- bool subset (hb_subset_context_t *c) const
- {
- TRACE_SUBSET (this);
- const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
- const hb_map_t &glyph_map = *c->plan->glyph_map;
-
- auto it =
- + hb_iter (this+coverage)
- | hb_filter (glyphset)
- | hb_map_retains_sorting (glyph_map)
- | hb_zip (hb_repeat (values.as_array (valueFormat.get_len ())))
- ;
-
- bool ret = bool (it);
- SinglePos_serialize (c->serializer, this, it, c->plan->layout_variation_idx_map);
- return_trace (ret);
- }
-
- 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:
- HBUINT16 format; /* Format identifier--format = 1 */
- Offset16To<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
-{
- bool intersects (const hb_set_t *glyphs) const
- { return (this+coverage).intersects (glyphs); }
-
- void closure_lookups (hb_closure_lookups_context_t *c) const {}
- void collect_variation_indices (hb_collect_variation_indices_context_t *c) const
- {
- if (!valueFormat.has_device ()) return;
-
- auto it =
- + hb_zip (this+coverage, hb_range ((unsigned) valueCount))
- | hb_filter (c->glyph_set, hb_first)
- ;
-
- if (!it) return;
-
- unsigned sub_length = valueFormat.get_len ();
- const hb_array_t<const Value> values_array = values.as_array (valueCount * sub_length);
-
- for (unsigned i : + it
- | hb_map (hb_second))
- valueFormat.collect_variation_indices (c, this, values_array.sub_array (i * sub_length, sub_length));
-
- }
-
- void collect_glyphs (hb_collect_glyphs_context_t *c) const
- { if (unlikely (!(this+coverage).collect_coverage (c->input))) return; }
-
- const Coverage &get_coverage () const { return this+coverage; }
-
- ValueFormat get_value_format () const { return valueFormat; }
-
- bool apply (hb_ot_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);
- }
-
- template<typename Iterator,
- typename SrcLookup,
- hb_requires (hb_is_iterator (Iterator))>
- void serialize (hb_serialize_context_t *c,
- const SrcLookup *src,
- Iterator it,
- ValueFormat newFormat,
- const hb_map_t *layout_variation_idx_map)
- {
- auto out = c->extend_min (this);
- if (unlikely (!out)) return;
- if (unlikely (!c->check_assign (valueFormat, newFormat, HB_SERIALIZE_ERROR_INT_OVERFLOW))) return;
- if (unlikely (!c->check_assign (valueCount, it.len (), HB_SERIALIZE_ERROR_ARRAY_OVERFLOW))) return;
-
- + it
- | hb_map (hb_second)
- | hb_apply ([&] (hb_array_t<const Value> _)
- { src->get_value_format ().copy_values (c, newFormat, src, &_, layout_variation_idx_map); })
- ;
-
- auto glyphs =
- + it
- | hb_map_retains_sorting (hb_first)
- ;
-
- coverage.serialize_serialize (c, glyphs);
- }
-
- bool subset (hb_subset_context_t *c) const
- {
- TRACE_SUBSET (this);
- const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
- const hb_map_t &glyph_map = *c->plan->glyph_map;
-
- unsigned sub_length = valueFormat.get_len ();
- auto values_array = values.as_array (valueCount * sub_length);
-
- auto it =
- + hb_zip (this+coverage, hb_range ((unsigned) valueCount))
- | hb_filter (glyphset, hb_first)
- | hb_map_retains_sorting ([&] (const hb_pair_t<hb_codepoint_t, unsigned>& _)
- {
- return hb_pair (glyph_map[_.first],
- values_array.sub_array (_.second * sub_length,
- sub_length));
- })
- ;
-
- bool ret = bool (it);
- SinglePos_serialize (c->serializer, this, it, c->plan->layout_variation_idx_map);
- return_trace (ret);
- }
-
- 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:
- HBUINT16 format; /* Format identifier--format = 2 */
- Offset16To<Coverage>
- coverage; /* Offset to Coverage table--from
- * beginning of subtable */
- ValueFormat valueFormat; /* Defines the types of data in the
- * ValueRecord */
- HBUINT16 valueCount; /* Number of ValueRecords */
- ValueRecord values; /* Array of ValueRecords--positioning
- * values applied to glyphs */
- public:
- DEFINE_SIZE_ARRAY (8, values);
-};
-
-struct SinglePos
-{
- template<typename Iterator,
- hb_requires (hb_is_iterator (Iterator))>
- unsigned get_format (Iterator glyph_val_iter_pairs)
- {
- hb_array_t<const Value> first_val_iter = hb_second (*glyph_val_iter_pairs);
-
- for (const auto iter : glyph_val_iter_pairs)
- for (const auto _ : hb_zip (iter.second, first_val_iter))
- if (_.first != _.second)
- return 2;
-
- return 1;
- }
-
-
- template<typename Iterator,
- typename SrcLookup,
- hb_requires (hb_is_iterator (Iterator))>
- void serialize (hb_serialize_context_t *c,
- const SrcLookup* src,
- Iterator glyph_val_iter_pairs,
- const hb_map_t *layout_variation_idx_map)
- {
- if (unlikely (!c->extend_min (u.format))) return;
- unsigned format = 2;
- ValueFormat new_format = src->get_value_format ();
-
- if (glyph_val_iter_pairs)
- {
- format = get_format (glyph_val_iter_pairs);
- new_format = src->get_value_format ().get_effective_format (+ glyph_val_iter_pairs | hb_map (hb_second));
- }
-
- u.format = format;
- switch (u.format) {
- case 1: u.format1.serialize (c,
- src,
- glyph_val_iter_pairs,
- new_format,
- layout_variation_idx_map);
- return;
- case 2: u.format2.serialize (c,
- src,
- glyph_val_iter_pairs,
- new_format,
- layout_variation_idx_map);
- return;
- default:return;
- }
- }
-
- template <typename context_t, typename ...Ts>
- typename context_t::return_t dispatch (context_t *c, Ts&&... ds) 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, std::forward<Ts> (ds)...));
- case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...));
- default:return_trace (c->default_return_value ());
- }
- }
-
- protected:
- union {
- HBUINT16 format; /* Format identifier */
- SinglePosFormat1 format1;
- SinglePosFormat2 format2;
- } u;
-};
-
-template<typename Iterator, typename SrcLookup>
-static void
-SinglePos_serialize (hb_serialize_context_t *c,
- const SrcLookup *src,
- Iterator it,
- const hb_map_t *layout_variation_idx_map)
-{ c->start_embed<SinglePos> ()->serialize (c, src, it, layout_variation_idx_map); }
-
-
-struct PairValueRecord
-{
- friend struct PairSet;
-
- int cmp (hb_codepoint_t k) const
- { return secondGlyph.cmp (k); }
-
- struct context_t
- {
- const void *base;
- const ValueFormat *valueFormats;
- const ValueFormat *newFormats;
- unsigned len1; /* valueFormats[0].get_len() */
- const hb_map_t *glyph_map;
- const hb_map_t *layout_variation_idx_map;
- };
-
- bool subset (hb_subset_context_t *c,
- context_t *closure) const
- {
- TRACE_SERIALIZE (this);
- auto *s = c->serializer;
- auto *out = s->start_embed (*this);
- if (unlikely (!s->extend_min (out))) return_trace (false);
-
- out->secondGlyph = (*closure->glyph_map)[secondGlyph];
-
- closure->valueFormats[0].copy_values (s,
- closure->newFormats[0],
- closure->base, &values[0],
- closure->layout_variation_idx_map);
- closure->valueFormats[1].copy_values (s,
- closure->newFormats[1],
- closure->base,
- &values[closure->len1],
- closure->layout_variation_idx_map);
-
- return_trace (true);
- }
-
- void collect_variation_indices (hb_collect_variation_indices_context_t *c,
- const ValueFormat *valueFormats,
- const void *base) const
- {
- unsigned record1_len = valueFormats[0].get_len ();
- unsigned record2_len = valueFormats[1].get_len ();
- const hb_array_t<const Value> values_array = values.as_array (record1_len + record2_len);
-
- if (valueFormats[0].has_device ())
- valueFormats[0].collect_variation_indices (c, base, values_array.sub_array (0, record1_len));
-
- if (valueFormats[1].has_device ())
- valueFormats[1].collect_variation_indices (c, base, values_array.sub_array (record1_len, record2_len));
- }
-
- bool intersects (const hb_set_t& glyphset) const
- {
- return glyphset.has(secondGlyph);
- }
-
- const Value* get_values_1 () const
- {
- return &values[0];
- }
-
- const Value* get_values_2 (ValueFormat format1) const
- {
- return &values[format1.get_len ()];
- }
-
- protected:
- HBGlyphID16 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;
-
- bool intersects (const hb_set_t *glyphs,
- const ValueFormat *valueFormats) const
- {
- unsigned int len1 = valueFormats[0].get_len ();
- unsigned int len2 = valueFormats[1].get_len ();
- unsigned int record_size = HBUINT16::static_size * (1 + len1 + len2);
-
- const PairValueRecord *record = &firstPairValueRecord;
- unsigned int count = len;
- for (unsigned int i = 0; i < count; i++)
- {
- if (glyphs->has (record->secondGlyph))
- return true;
- record = &StructAtOffset<const PairValueRecord> (record, record_size);
- }
- return false;
- }
-
- void collect_glyphs (hb_collect_glyphs_context_t *c,
- const ValueFormat *valueFormats) const
- {
- unsigned int len1 = valueFormats[0].get_len ();
- unsigned int len2 = valueFormats[1].get_len ();
- unsigned int record_size = HBUINT16::static_size * (1 + len1 + len2);
-
- const PairValueRecord *record = &firstPairValueRecord;
- c->input->add_array (&record->secondGlyph, len, record_size);
- }
-
- void collect_variation_indices (hb_collect_variation_indices_context_t *c,
- const ValueFormat *valueFormats) const
- {
- unsigned len1 = valueFormats[0].get_len ();
- unsigned len2 = valueFormats[1].get_len ();
- unsigned record_size = HBUINT16::static_size * (1 + len1 + len2);
-
- const PairValueRecord *record = &firstPairValueRecord;
- unsigned count = len;
- for (unsigned i = 0; i < count; i++)
- {
- if (c->glyph_set->has (record->secondGlyph))
- { record->collect_variation_indices (c, valueFormats, this); }
-
- record = &StructAtOffset<const PairValueRecord> (record, record_size);
- }
- }
-
- bool apply (hb_ot_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 = HBUINT16::static_size * (1 + len1 + len2);
-
- const PairValueRecord *record = hb_bsearch (buffer->info[pos].codepoint,
- &firstPairValueRecord,
- len,
- record_size);
- if (record)
- {
- bool applied_first = valueFormats[0].apply_value (c, this, &record->values[0], buffer->cur_pos());
- bool applied_second = valueFormats[1].apply_value (c, this, &record->values[len1], buffer->pos[pos]);
- if (applied_first || applied_second)
- buffer->unsafe_to_break (buffer->idx, pos + 1);
- if (len2)
- pos++;
- buffer->idx = pos;
- return_trace (true);
- }
- buffer->unsafe_to_concat (buffer->idx, pos + 1);
- return_trace (false);
- }
-
- bool subset (hb_subset_context_t *c,
- const ValueFormat valueFormats[2],
- const ValueFormat newFormats[2]) const
- {
- TRACE_SUBSET (this);
- auto snap = c->serializer->snapshot ();
-
- auto *out = c->serializer->start_embed (*this);
- if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
- out->len = 0;
-
- const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
- const hb_map_t &glyph_map = *c->plan->glyph_map;
-
- unsigned len1 = valueFormats[0].get_len ();
- unsigned len2 = valueFormats[1].get_len ();
- unsigned record_size = HBUINT16::static_size + Value::static_size * (len1 + len2);
-
- PairValueRecord::context_t context =
- {
- this,
- valueFormats,
- newFormats,
- len1,
- &glyph_map,
- c->plan->layout_variation_idx_map
- };
-
- const PairValueRecord *record = &firstPairValueRecord;
- unsigned count = len, num = 0;
- for (unsigned i = 0; i < count; i++)
- {
- if (glyphset.has (record->secondGlyph)
- && record->subset (c, &context)) num++;
- record = &StructAtOffset<const PairValueRecord> (record, record_size);
- }
-
- out->len = num;
- if (!num) c->serializer->revert (snap);
- return_trace (num);
- }
-
- struct sanitize_closure_t
- {
- const ValueFormat *valueFormats;
- unsigned int len1; /* valueFormats[0].get_len() */
- unsigned int stride; /* 1 + len1 + len2 */
- };
-
- bool sanitize (hb_sanitize_context_t *c, const sanitize_closure_t *closure) const
- {
- TRACE_SANITIZE (this);
- if (!(c->check_struct (this)
- && c->check_range (&firstPairValueRecord,
- len,
- HBUINT16::static_size,
- closure->stride))) return_trace (false);
-
- unsigned int count = len;
- const PairValueRecord *record = &firstPairValueRecord;
- return_trace (closure->valueFormats[0].sanitize_values_stride_unsafe (c, this, &record->values[0], count, closure->stride) &&
- closure->valueFormats[1].sanitize_values_stride_unsafe (c, this, &record->values[closure->len1], count, closure->stride));
- }
-
- protected:
- HBUINT16 len; /* Number of PairValueRecords */
- PairValueRecord firstPairValueRecord;
- /* Array of PairValueRecords--ordered
- * by GlyphID of the second glyph */
- public:
- DEFINE_SIZE_MIN (2);
-};
-
-struct PairPosFormat1
-{
- bool intersects (const hb_set_t *glyphs) const
- {
- return
- + hb_zip (this+coverage, pairSet)
- | hb_filter (*glyphs, hb_first)
- | hb_map (hb_second)
- | hb_map ([glyphs, this] (const Offset16To<PairSet> &_)
- { return (this+_).intersects (glyphs, valueFormat); })
- | hb_any
- ;
- }
-
- void closure_lookups (hb_closure_lookups_context_t *c) const {}
- void collect_variation_indices (hb_collect_variation_indices_context_t *c) const
- {
- if ((!valueFormat[0].has_device ()) && (!valueFormat[1].has_device ())) return;
-
- auto it =
- + hb_zip (this+coverage, pairSet)
- | hb_filter (c->glyph_set, hb_first)
- | hb_map (hb_second)
- ;
-
- if (!it) return;
- + it
- | hb_map (hb_add (this))
- | hb_apply ([&] (const PairSet& _) { _.collect_variation_indices (c, valueFormat); })
- ;
- }
-
- void collect_glyphs (hb_collect_glyphs_context_t *c) const
- {
- if (unlikely (!(this+coverage).collect_coverage (c->input))) return;
- unsigned int count = pairSet.len;
- for (unsigned int i = 0; i < count; i++)
- (this+pairSet[i]).collect_glyphs (c, valueFormat);
- }
-
- const Coverage &get_coverage () const { return this+coverage; }
-
- bool apply (hb_ot_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_ot_apply_context_t::skipping_iterator_t &skippy_iter = c->iter_input;
- skippy_iter.reset (buffer->idx, 1);
- unsigned unsafe_to;
- if (!skippy_iter.next (&unsafe_to))
- {
- buffer->unsafe_to_concat (buffer->idx, unsafe_to);
- return_trace (false);
- }
-
- return_trace ((this+pairSet[index]).apply (c, valueFormat, skippy_iter.idx));
- }
-
- bool subset (hb_subset_context_t *c) const
- {
- TRACE_SUBSET (this);
-
- const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
- const hb_map_t &glyph_map = *c->plan->glyph_map;
-
- auto *out = c->serializer->start_embed (*this);
- if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
- out->format = format;
- out->valueFormat[0] = valueFormat[0];
- out->valueFormat[1] = valueFormat[1];
- if (c->plan->flags & HB_SUBSET_FLAGS_NO_HINTING)
- {
- hb_pair_t<unsigned, unsigned> newFormats = compute_effective_value_formats (glyphset);
- out->valueFormat[0] = newFormats.first;
- out->valueFormat[1] = newFormats.second;
- }
-
- hb_sorted_vector_t<hb_codepoint_t> new_coverage;
-
- + hb_zip (this+coverage, pairSet)
- | hb_filter (glyphset, hb_first)
- | hb_filter ([this, c, out] (const Offset16To<PairSet>& _)
- {
- auto snap = c->serializer->snapshot ();
- auto *o = out->pairSet.serialize_append (c->serializer);
- if (unlikely (!o)) return false;
- bool ret = o->serialize_subset (c, _, this, valueFormat, out->valueFormat);
- if (!ret)
- {
- out->pairSet.pop ();
- c->serializer->revert (snap);
- }
- return ret;
- },
- hb_second)
- | hb_map (hb_first)
- | hb_map (glyph_map)
- | hb_sink (new_coverage)
- ;
-
- out->coverage.serialize_serialize (c->serializer, new_coverage.iter ());
-
- return_trace (bool (new_coverage));
- }
-
-
- hb_pair_t<unsigned, unsigned> compute_effective_value_formats (const hb_set_t& glyphset) const
- {
- unsigned len1 = valueFormat[0].get_len ();
- unsigned len2 = valueFormat[1].get_len ();
- unsigned record_size = HBUINT16::static_size + Value::static_size * (len1 + len2);
-
- unsigned format1 = 0;
- unsigned format2 = 0;
- for (const Offset16To<PairSet>& _ :
- + hb_zip (this+coverage, pairSet) | hb_filter (glyphset, hb_first) | hb_map (hb_second))
- {
- const PairSet& set = (this + _);
- const PairValueRecord *record = &set.firstPairValueRecord;
-
- for (unsigned i = 0; i < set.len; i++)
- {
- if (record->intersects (glyphset))
- {
- format1 = format1 | valueFormat[0].get_effective_format (record->get_values_1 ());
- format2 = format2 | valueFormat[1].get_effective_format (record->get_values_2 (valueFormat[0]));
- }
- record = &StructAtOffset<const PairValueRecord> (record, record_size);
- }
- }
-
- return hb_pair (format1, format2);
- }
-
-
- 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 =
- {
- valueFormat,
- len1,
- 1 + len1 + len2
- };
-
- return_trace (coverage.sanitize (c, this) && pairSet.sanitize (c, this, &closure));
- }
-
- protected:
- HBUINT16 format; /* Format identifier--format = 1 */
- Offset16To<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) */
- Array16OfOffset16To<PairSet>
- pairSet; /* Array of PairSet tables
- * ordered by Coverage Index */
- public:
- DEFINE_SIZE_ARRAY (10, pairSet);
-};
-
-struct PairPosFormat2
-{
- bool intersects (const hb_set_t *glyphs) const
- {
- return (this+coverage).intersects (glyphs) &&
- (this+classDef2).intersects (glyphs);
- }
-
- void closure_lookups (hb_closure_lookups_context_t *c) const {}
- void collect_variation_indices (hb_collect_variation_indices_context_t *c) const
- {
- if (!intersects (c->glyph_set)) return;
- if ((!valueFormat1.has_device ()) && (!valueFormat2.has_device ())) return;
-
- hb_set_t klass1_glyphs, klass2_glyphs;
- if (!(this+classDef1).collect_coverage (&klass1_glyphs)) return;
- if (!(this+classDef2).collect_coverage (&klass2_glyphs)) return;
-
- hb_set_t class1_set, class2_set;
- for (const unsigned cp : + c->glyph_set->iter () | hb_filter (this + coverage))
- {
- if (!klass1_glyphs.has (cp)) class1_set.add (0);
- else
- {
- unsigned klass1 = (this+classDef1).get (cp);
- class1_set.add (klass1);
- }
- }
-
- class2_set.add (0);
- for (const unsigned cp : + c->glyph_set->iter () | hb_filter (klass2_glyphs))
- {
- unsigned klass2 = (this+classDef2).get (cp);
- class2_set.add (klass2);
- }
-
- if (class1_set.is_empty ()
- || class2_set.is_empty ()
- || (class2_set.get_population() == 1 && class2_set.has(0)))
- return;
-
- unsigned len1 = valueFormat1.get_len ();
- unsigned len2 = valueFormat2.get_len ();
- const hb_array_t<const Value> values_array = values.as_array ((unsigned)class1Count * (unsigned) class2Count * (len1 + len2));
- for (const unsigned class1_idx : class1_set.iter ())
- {
- for (const unsigned class2_idx : class2_set.iter ())
- {
- unsigned start_offset = (class1_idx * (unsigned) class2Count + class2_idx) * (len1 + len2);
- if (valueFormat1.has_device ())
- valueFormat1.collect_variation_indices (c, this, values_array.sub_array (start_offset, len1));
-
- if (valueFormat2.has_device ())
- valueFormat2.collect_variation_indices (c, this, values_array.sub_array (start_offset+len1, len2));
- }
- }
- }
-
- void collect_glyphs (hb_collect_glyphs_context_t *c) const
- {
- if (unlikely (!(this+coverage).collect_coverage (c->input))) return;
- if (unlikely (!(this+classDef2).collect_coverage (c->input))) return;
- }
-
- const Coverage &get_coverage () const { return this+coverage; }
-
- bool apply (hb_ot_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_ot_apply_context_t::skipping_iterator_t &skippy_iter = c->iter_input;
- skippy_iter.reset (buffer->idx, 1);
- unsigned unsafe_to;
- if (!skippy_iter.next (&unsafe_to))
- {
- buffer->unsafe_to_concat (buffer->idx, unsafe_to);
- 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))
- {
- buffer->unsafe_to_concat (buffer->idx, skippy_iter.idx + 1);
- return_trace (false);
- }
-
- const Value *v = &values[record_len * (klass1 * class2Count + klass2)];
-
- bool applied_first = false, applied_second = false;
-
-
- /* Isolate simple kerning and apply it half to each side.
- * Results in better cursor positinoing / underline drawing.
- *
- * Disabled, because causes issues... :-(
- * https://github.com/harfbuzz/harfbuzz/issues/3408
- * https://github.com/harfbuzz/harfbuzz/pull/3235#issuecomment-1029814978
- */
-#ifndef HB_SPLIT_KERN
- if (0)
-#endif
- {
- if (!len2)
- {
- const hb_direction_t dir = buffer->props.direction;
- const bool horizontal = HB_DIRECTION_IS_HORIZONTAL (dir);
- const bool backward = HB_DIRECTION_IS_BACKWARD (dir);
- unsigned mask = horizontal ? ValueFormat::xAdvance : ValueFormat::yAdvance;
- if (backward)
- mask |= mask >> 2; /* Add eg. xPlacement in RTL. */
- /* Add Devices. */
- mask |= mask << 4;
-
- if (valueFormat1 & ~mask)
- goto bail;
-
- /* Is simple kern. Apply value on an empty position slot,
- * then split it between sides. */
-
- hb_glyph_position_t pos{};
- if (valueFormat1.apply_value (c, this, v, pos))
- {
- hb_position_t *src = &pos.x_advance;
- hb_position_t *dst1 = &buffer->cur_pos().x_advance;
- hb_position_t *dst2 = &buffer->pos[skippy_iter.idx].x_advance;
- unsigned i = horizontal ? 0 : 1;
-
- hb_position_t kern = src[i];
- hb_position_t kern1 = kern >> 1;
- hb_position_t kern2 = kern - kern1;
-
- if (!backward)
- {
- dst1[i] += kern1;
- dst2[i] += kern2;
- dst2[i + 2] += kern2;
- }
- else
- {
- dst1[i] += kern1;
- dst1[i + 2] += src[i + 2] - kern2;
- dst2[i] += kern2;
- }
-
- applied_first = applied_second = kern != 0;
- goto success;
- }
- goto boring;
- }
- }
- bail:
-
-
- applied_first = valueFormat1.apply_value (c, this, v, buffer->cur_pos());
- applied_second = valueFormat2.apply_value (c, this, v + len1, buffer->pos[skippy_iter.idx]);
-
- success:
- if (applied_first || applied_second)
- buffer->unsafe_to_break (buffer->idx, skippy_iter.idx + 1);
- else
- boring:
- buffer->unsafe_to_concat (buffer->idx, skippy_iter.idx + 1);
-
-
- buffer->idx = skippy_iter.idx;
- if (len2)
- buffer->idx++;
-
- return_trace (true);
- }
-
- bool subset (hb_subset_context_t *c) const
- {
- TRACE_SUBSET (this);
- auto *out = c->serializer->start_embed (*this);
- if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
- out->format = format;
-
- hb_map_t klass1_map;
- out->classDef1.serialize_subset (c, classDef1, this, &klass1_map, true, true, &(this + coverage));
- out->class1Count = klass1_map.get_population ();
-
- hb_map_t klass2_map;
- out->classDef2.serialize_subset (c, classDef2, this, &klass2_map, true, false);
- out->class2Count = klass2_map.get_population ();
-
- unsigned len1 = valueFormat1.get_len ();
- unsigned len2 = valueFormat2.get_len ();
-
- hb_pair_t<unsigned, unsigned> newFormats = hb_pair (valueFormat1, valueFormat2);
- if (c->plan->flags & HB_SUBSET_FLAGS_NO_HINTING)
- newFormats = compute_effective_value_formats (klass1_map, klass2_map);
-
- out->valueFormat1 = newFormats.first;
- out->valueFormat2 = newFormats.second;
-
- for (unsigned class1_idx : + hb_range ((unsigned) class1Count) | hb_filter (klass1_map))
- {
- for (unsigned class2_idx : + hb_range ((unsigned) class2Count) | hb_filter (klass2_map))
- {
- unsigned idx = (class1_idx * (unsigned) class2Count + class2_idx) * (len1 + len2);
- valueFormat1.copy_values (c->serializer, newFormats.first, this, &values[idx], c->plan->layout_variation_idx_map);
- valueFormat2.copy_values (c->serializer, newFormats.second, this, &values[idx + len1], c->plan->layout_variation_idx_map);
- }
- }
-
- const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
- const hb_map_t &glyph_map = *c->plan->glyph_map;
-
- auto it =
- + hb_iter (this+coverage)
- | hb_filter (glyphset)
- | hb_map_retains_sorting (glyph_map)
- ;
-
- out->coverage.serialize_serialize (c->serializer, it);
- return_trace (out->class1Count && out->class2Count && bool (it));
- }
-
-
- hb_pair_t<unsigned, unsigned> compute_effective_value_formats (const hb_map_t& klass1_map,
- const hb_map_t& klass2_map) const
- {
- unsigned len1 = valueFormat1.get_len ();
- unsigned len2 = valueFormat2.get_len ();
-
- unsigned format1 = 0;
- unsigned format2 = 0;
-
- for (unsigned class1_idx : + hb_range ((unsigned) class1Count) | hb_filter (klass1_map))
- {
- for (unsigned class2_idx : + hb_range ((unsigned) class2Count) | hb_filter (klass2_map))
- {
- unsigned idx = (class1_idx * (unsigned) class2Count + class2_idx) * (len1 + len2);
- format1 = format1 | valueFormat1.get_effective_format (&values[idx]);
- format2 = format2 | valueFormat2.get_effective_format (&values[idx + len1]);
- }
- }
-
- return hb_pair (format1, format2);
- }
-
-
- 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_range ((const void *) values,
- count,
- record_size) &&
- valueFormat1.sanitize_values_stride_unsafe (c, this, &values[0], count, stride) &&
- valueFormat2.sanitize_values_stride_unsafe (c, this, &values[len1], count, stride));
- }
-
- protected:
- HBUINT16 format; /* Format identifier--format = 2 */
- Offset16To<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) */
- Offset16To<ClassDef>
- classDef1; /* Offset to ClassDef table--from
- * beginning of PairPos subtable--for
- * the first glyph of the pair */
- Offset16To<ClassDef>
- classDef2; /* Offset to ClassDef table--from
- * beginning of PairPos subtable--for
- * the second glyph of the pair */
- HBUINT16 class1Count; /* Number of classes in ClassDef1
- * table--includes Class0 */
- HBUINT16 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, typename ...Ts>
- typename context_t::return_t dispatch (context_t *c, Ts&&... ds) 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, std::forward<Ts> (ds)...));
- case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...));
- default:return_trace (c->default_return_value ());
- }
- }
-
- protected:
- union {
- HBUINT16 format; /* Format identifier */
- PairPosFormat1 format1;
- PairPosFormat2 format2;
- } u;
-};
-
-
-struct EntryExitRecord
-{
- friend struct CursivePosFormat1;
-
- bool sanitize (hb_sanitize_context_t *c, const void *base) const
- {
- TRACE_SANITIZE (this);
- return_trace (entryAnchor.sanitize (c, base) && exitAnchor.sanitize (c, base));
- }
-
- void collect_variation_indices (hb_collect_variation_indices_context_t *c,
- const void *src_base) const
- {
- (src_base+entryAnchor).collect_variation_indices (c);
- (src_base+exitAnchor).collect_variation_indices (c);
- }
-
- EntryExitRecord* subset (hb_subset_context_t *c,
- const void *src_base) const
- {
- TRACE_SERIALIZE (this);
- auto *out = c->serializer->embed (this);
- if (unlikely (!out)) return_trace (nullptr);
-
- out->entryAnchor.serialize_subset (c, entryAnchor, src_base);
- out->exitAnchor.serialize_subset (c, exitAnchor, src_base);
- return_trace (out);
- }
-
- protected:
- Offset16To<Anchor>
- entryAnchor; /* Offset to EntryAnchor table--from
- * beginning of CursivePos
- * subtable--may be NULL */
- Offset16To<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
-{
- bool intersects (const hb_set_t *glyphs) const
- { return (this+coverage).intersects (glyphs); }
-
- void closure_lookups (hb_closure_lookups_context_t *c) const {}
-
- void collect_variation_indices (hb_collect_variation_indices_context_t *c) const
- {
- + hb_zip (this+coverage, entryExitRecord)
- | hb_filter (c->glyph_set, hb_first)
- | hb_map (hb_second)
- | hb_apply ([&] (const EntryExitRecord& record) { record.collect_variation_indices (c, this); })
- ;
- }
-
- void collect_glyphs (hb_collect_glyphs_context_t *c) const
- { if (unlikely (!(this+coverage).collect_coverage (c->input))) return; }
-
- const Coverage &get_coverage () const { return this+coverage; }
-
- bool apply (hb_ot_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.entryAnchor) return_trace (false);
-
- hb_ot_apply_context_t::skipping_iterator_t &skippy_iter = c->iter_input;
- skippy_iter.reset (buffer->idx, 1);
- unsigned unsafe_from;
- if (!skippy_iter.prev (&unsafe_from))
- {
- buffer->unsafe_to_concat_from_outbuffer (unsafe_from, buffer->idx + 1);
- return_trace (false);
- }
-
- const EntryExitRecord &prev_record = entryExitRecord[(this+coverage).get_coverage (buffer->info[skippy_iter.idx].codepoint)];
- if (!prev_record.exitAnchor)
- {
- buffer->unsafe_to_concat_from_outbuffer (skippy_iter.idx, buffer->idx + 1);
- return_trace (false);
- }
-
- unsigned int i = skippy_iter.idx;
- unsigned int j = buffer->idx;
-
- buffer->unsafe_to_break (i, j);
- float entry_x, entry_y, exit_x, exit_y;
- (this+prev_record.exitAnchor).get_anchor (c, buffer->info[i].codepoint, &exit_x, &exit_y);
- (this+this_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 = roundf (exit_x) + pos[i].x_offset;
-
- d = roundf (entry_x) + pos[j].x_offset;
- pos[j].x_advance -= d;
- pos[j].x_offset -= d;
- break;
- case HB_DIRECTION_RTL:
- d = roundf (exit_x) + pos[i].x_offset;
- pos[i].x_advance -= d;
- pos[i].x_offset -= d;
-
- pos[j].x_advance = roundf (entry_x) + pos[j].x_offset;
- break;
- case HB_DIRECTION_TTB:
- pos[i].y_advance = roundf (exit_y) + pos[i].y_offset;
-
- d = roundf (entry_y) + pos[j].y_offset;
- pos[j].y_advance -= d;
- pos[j].y_offset -= d;
- break;
- case HB_DIRECTION_BTT:
- d = roundf (exit_y) + pos[i].y_offset;
- pos[i].y_advance -= d;
- pos[i].y_offset -= d;
-
- pos[j].y_advance = roundf (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
- * Arabic. */
- 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;
-
- /* If parent was attached to child, separate them.
- * https://github.com/harfbuzz/harfbuzz/issues/2469
- */
- if (unlikely (pos[parent].attach_chain() == -pos[child].attach_chain()))
- pos[parent].attach_chain() = 0;
-
- buffer->idx++;
- return_trace (true);
- }
-
- template <typename Iterator,
- hb_requires (hb_is_iterator (Iterator))>
- void serialize (hb_subset_context_t *c,
- Iterator it,
- const void *src_base)
- {
- if (unlikely (!c->serializer->extend_min ((*this)))) return;
- this->format = 1;
- this->entryExitRecord.len = it.len ();
-
- for (const EntryExitRecord& entry_record : + it
- | hb_map (hb_second))
- entry_record.subset (c, src_base);
-
- auto glyphs =
- + it
- | hb_map_retains_sorting (hb_first)
- ;
-
- coverage.serialize_serialize (c->serializer, glyphs);
- }
-
- bool subset (hb_subset_context_t *c) const
- {
- TRACE_SUBSET (this);
- const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
- const hb_map_t &glyph_map = *c->plan->glyph_map;
-
- auto *out = c->serializer->start_embed (*this);
- if (unlikely (!out)) return_trace (false);
-
- auto it =
- + hb_zip (this+coverage, entryExitRecord)
- | hb_filter (glyphset, hb_first)
- | hb_map_retains_sorting ([&] (hb_pair_t<hb_codepoint_t, const EntryExitRecord&> p) -> hb_pair_t<hb_codepoint_t, const EntryExitRecord&>
- { return hb_pair (glyph_map[p.first], p.second);})
- ;
-
- bool ret = bool (it);
- out->serialize (c, it, this);
- return_trace (ret);
- }
-
- bool sanitize (hb_sanitize_context_t *c) const
- {
- TRACE_SANITIZE (this);
- return_trace (coverage.sanitize (c, this) && entryExitRecord.sanitize (c, this));
- }
-
- protected:
- HBUINT16 format; /* Format identifier--format = 1 */
- Offset16To<Coverage>
- coverage; /* Offset to Coverage table--from
- * beginning of subtable */
- Array16Of<EntryExitRecord>
- entryExitRecord; /* Array of EntryExit records--in
- * Coverage Index order */
- public:
- DEFINE_SIZE_ARRAY (6, entryExitRecord);
-};
-
-struct CursivePos
-{
- template <typename context_t, typename ...Ts>
- typename context_t::return_t dispatch (context_t *c, Ts&&... ds) 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, std::forward<Ts> (ds)...));
- default:return_trace (c->default_return_value ());
- }
- }
-
- protected:
- union {
- HBUINT16 format; /* Format identifier */
- CursivePosFormat1 format1;
- } u;
-};
-
-
-typedef AnchorMatrix BaseArray; /* base-major--
- * in order of BaseCoverage Index--,
- * mark-minor--
- * ordered by class--zero-based. */
-
-static void Markclass_closure_and_remap_indexes (const Coverage &mark_coverage,
- const MarkArray &mark_array,
- const hb_set_t &glyphset,
- hb_map_t* klass_mapping /* INOUT */)
-{
- hb_set_t orig_classes;
-
- + hb_zip (mark_coverage, mark_array)
- | hb_filter (glyphset, hb_first)
- | hb_map (hb_second)
- | hb_map (&MarkRecord::get_class)
- | hb_sink (orig_classes)
- ;
-
- unsigned idx = 0;
- for (auto klass : orig_classes.iter ())
- {
- if (klass_mapping->has (klass)) continue;
- klass_mapping->set (klass, idx);
- idx++;
- }
-}
-
-struct MarkBasePosFormat1
-{
- bool intersects (const hb_set_t *glyphs) const
- {
- return (this+markCoverage).intersects (glyphs) &&
- (this+baseCoverage).intersects (glyphs);
- }
-
- void closure_lookups (hb_closure_lookups_context_t *c) const {}
-
- void collect_variation_indices (hb_collect_variation_indices_context_t *c) const
- {
- + hb_zip (this+markCoverage, this+markArray)
- | hb_filter (c->glyph_set, hb_first)
- | hb_map (hb_second)
- | hb_apply ([&] (const MarkRecord& record) { record.collect_variation_indices (c, &(this+markArray)); })
- ;
-
- hb_map_t klass_mapping;
- Markclass_closure_and_remap_indexes (this+markCoverage, this+markArray, *c->glyph_set, &klass_mapping);
-
- unsigned basecount = (this+baseArray).rows;
- auto base_iter =
- + hb_zip (this+baseCoverage, hb_range (basecount))
- | hb_filter (c->glyph_set, hb_first)
- | hb_map (hb_second)
- ;
-
- hb_sorted_vector_t<unsigned> base_indexes;
- for (const unsigned row : base_iter)
- {
- + hb_range ((unsigned) classCount)
- | hb_filter (klass_mapping)
- | hb_map ([&] (const unsigned col) { return row * (unsigned) classCount + col; })
- | hb_sink (base_indexes)
- ;
- }
- (this+baseArray).collect_variation_indices (c, base_indexes.iter ());
- }
-
- void collect_glyphs (hb_collect_glyphs_context_t *c) const
- {
- if (unlikely (!(this+markCoverage).collect_coverage (c->input))) return;
- if (unlikely (!(this+baseCoverage).collect_coverage (c->input))) return;
- }
-
- const Coverage &get_coverage () const { return this+markCoverage; }
-
- bool apply (hb_ot_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_ot_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 {
- unsigned unsafe_from;
- if (!skippy_iter.prev (&unsafe_from))
- {
- buffer->unsafe_to_concat_from_outbuffer (unsafe_from, buffer->idx + 1);
- return_trace (false);
- }
-
- /* We only want to attach to the first of a MultipleSubst sequence.
- * https://github.com/harfbuzz/harfbuzz/issues/740
- * Reject others...
- * ...but stop if we find a mark in the MultipleSubst sequence:
- * https://github.com/harfbuzz/harfbuzz/issues/1020 */
- if (!_hb_glyph_info_multiplied (&buffer->info[skippy_iter.idx]) ||
- 0 == _hb_glyph_info_get_lig_comp (&buffer->info[skippy_iter.idx]) ||
- (skippy_iter.idx == 0 ||
- _hb_glyph_info_is_mark (&buffer->info[skippy_iter.idx - 1]) ||
- _hb_glyph_info_get_lig_id (&buffer->info[skippy_iter.idx]) !=
- _hb_glyph_info_get_lig_id (&buffer->info[skippy_iter.idx - 1]) ||
- _hb_glyph_info_get_lig_comp (&buffer->info[skippy_iter.idx]) !=
- _hb_glyph_info_get_lig_comp (&buffer->info[skippy_iter.idx - 1]) + 1
- ))
- break;
- skippy_iter.reject ();
- } while (true);
-
- /* 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)
- {
- buffer->unsafe_to_concat_from_outbuffer (skippy_iter.idx, buffer->idx + 1);
- return_trace (false);
- }
-
- return_trace ((this+markArray).apply (c, mark_index, base_index, this+baseArray, classCount, skippy_iter.idx));
- }
-
- bool subset (hb_subset_context_t *c) const
- {
- TRACE_SUBSET (this);
- const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
- const hb_map_t &glyph_map = *c->plan->glyph_map;
-
- auto *out = c->serializer->start_embed (*this);
- if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
- out->format = format;
-
- hb_map_t klass_mapping;
- Markclass_closure_and_remap_indexes (this+markCoverage, this+markArray, glyphset, &klass_mapping);
-
- if (!klass_mapping.get_population ()) return_trace (false);
- out->classCount = klass_mapping.get_population ();
-
- auto mark_iter =
- + hb_zip (this+markCoverage, this+markArray)
- | hb_filter (glyphset, hb_first)
- ;
-
- hb_sorted_vector_t<hb_codepoint_t> new_coverage;
- + mark_iter
- | hb_map (hb_first)
- | hb_map (glyph_map)
- | hb_sink (new_coverage)
- ;
-
- if (!out->markCoverage.serialize_serialize (c->serializer, new_coverage.iter ()))
- return_trace (false);
-
- out->markArray.serialize_subset (c, markArray, this,
- (this+markCoverage).iter (),
- &klass_mapping);
-
- unsigned basecount = (this+baseArray).rows;
- auto base_iter =
- + hb_zip (this+baseCoverage, hb_range (basecount))
- | hb_filter (glyphset, hb_first)
- ;
-
- new_coverage.reset ();
- + base_iter
- | hb_map (hb_first)
- | hb_map (glyph_map)
- | hb_sink (new_coverage)
- ;
-
- if (!out->baseCoverage.serialize_serialize (c->serializer, new_coverage.iter ()))
- return_trace (false);
-
- hb_sorted_vector_t<unsigned> base_indexes;
- for (const unsigned row : + base_iter
- | hb_map (hb_second))
- {
- + hb_range ((unsigned) classCount)
- | hb_filter (klass_mapping)
- | hb_map ([&] (const unsigned col) { return row * (unsigned) classCount + col; })
- | hb_sink (base_indexes)
- ;
- }
-
- out->baseArray.serialize_subset (c, baseArray, this,
- base_iter.len (),
- base_indexes.iter ());
-
- return_trace (true);
- }
-
- 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:
- HBUINT16 format; /* Format identifier--format = 1 */
- Offset16To<Coverage>
- markCoverage; /* Offset to MarkCoverage table--from
- * beginning of MarkBasePos subtable */
- Offset16To<Coverage>
- baseCoverage; /* Offset to BaseCoverage table--from
- * beginning of MarkBasePos subtable */
- HBUINT16 classCount; /* Number of classes defined for marks */
- Offset16To<MarkArray>
- markArray; /* Offset to MarkArray table--from
- * beginning of MarkBasePos subtable */
- Offset16To<BaseArray>
- baseArray; /* Offset to BaseArray table--from
- * beginning of MarkBasePos subtable */
- public:
- DEFINE_SIZE_STATIC (12);
-};
-
-struct MarkBasePos
-{
- template <typename context_t, typename ...Ts>
- typename context_t::return_t dispatch (context_t *c, Ts&&... ds) 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, std::forward<Ts> (ds)...));
- default:return_trace (c->default_return_value ());
- }
- }
-
- protected:
- union {
- HBUINT16 format; /* Format identifier */
- MarkBasePosFormat1 format1;
- } u;
-};
-
-
-typedef AnchorMatrix LigatureAttach; /* component-major--
- * in order of writing direction--,
- * mark-minor--
- * ordered by class--zero-based. */
-
-/* Array of LigatureAttach tables ordered by LigatureCoverage Index */
-struct LigatureArray : List16OfOffset16To<LigatureAttach>
-{
- template <typename Iterator,
- hb_requires (hb_is_iterator (Iterator))>
- bool subset (hb_subset_context_t *c,
- Iterator coverage,
- unsigned class_count,
- const hb_map_t *klass_mapping) const
- {
- TRACE_SUBSET (this);
- const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
-
- auto *out = c->serializer->start_embed (this);
- if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
-
- for (const auto _ : + hb_zip (coverage, *this)
- | hb_filter (glyphset, hb_first))
- {
- auto *matrix = out->serialize_append (c->serializer);
- if (unlikely (!matrix)) return_trace (false);
-
- const LigatureAttach& src = (this + _.second);
- auto indexes =
- + hb_range (src.rows * class_count)
- | hb_filter ([=] (unsigned index) { return klass_mapping->has (index % class_count); })
- ;
- matrix->serialize_subset (c,
- _.second,
- this,
- src.rows,
- indexes);
- }
- return_trace (this->len);
- }
-};
-
-struct MarkLigPosFormat1
-{
- bool intersects (const hb_set_t *glyphs) const
- {
- return (this+markCoverage).intersects (glyphs) &&
- (this+ligatureCoverage).intersects (glyphs);
- }
-
- void closure_lookups (hb_closure_lookups_context_t *c) const {}
-
- void collect_variation_indices (hb_collect_variation_indices_context_t *c) const
- {
- + hb_zip (this+markCoverage, this+markArray)
- | hb_filter (c->glyph_set, hb_first)
- | hb_map (hb_second)
- | hb_apply ([&] (const MarkRecord& record) { record.collect_variation_indices (c, &(this+markArray)); })
- ;
-
- hb_map_t klass_mapping;
- Markclass_closure_and_remap_indexes (this+markCoverage, this+markArray, *c->glyph_set, &klass_mapping);
-
- unsigned ligcount = (this+ligatureArray).len;
- auto lig_iter =
- + hb_zip (this+ligatureCoverage, hb_range (ligcount))
- | hb_filter (c->glyph_set, hb_first)
- | hb_map (hb_second)
- ;
-
- const LigatureArray& lig_array = this+ligatureArray;
- for (const unsigned i : lig_iter)
- {
- hb_sorted_vector_t<unsigned> lig_indexes;
- unsigned row_count = lig_array[i].rows;
- for (unsigned row : + hb_range (row_count))
- {
- + hb_range ((unsigned) classCount)
- | hb_filter (klass_mapping)
- | hb_map ([&] (const unsigned col) { return row * (unsigned) classCount + col; })
- | hb_sink (lig_indexes)
- ;
- }
-
- lig_array[i].collect_variation_indices (c, lig_indexes.iter ());
- }
- }
-
- void collect_glyphs (hb_collect_glyphs_context_t *c) const
- {
- if (unlikely (!(this+markCoverage).collect_coverage (c->input))) return;
- if (unlikely (!(this+ligatureCoverage).collect_coverage (c->input))) return;
- }
-
- const Coverage &get_coverage () const { return this+markCoverage; }
-
- bool apply (hb_ot_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_ot_apply_context_t::skipping_iterator_t &skippy_iter = c->iter_input;
- skippy_iter.reset (buffer->idx, 1);
- skippy_iter.set_lookup_props (LookupFlag::IgnoreMarks);
- unsigned unsafe_from;
- if (!skippy_iter.prev (&unsafe_from))
- {
- buffer->unsafe_to_concat_from_outbuffer (unsafe_from, buffer->idx + 1);
- 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)
- {
- buffer->unsafe_to_concat_from_outbuffer (skippy_iter.idx, buffer->idx + 1);
- 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))
- {
- buffer->unsafe_to_concat_from_outbuffer (skippy_iter.idx, buffer->idx + 1);
- 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 = hb_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));
- }
-
- bool subset (hb_subset_context_t *c) const
- {
- TRACE_SUBSET (this);
- const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
- const hb_map_t &glyph_map = *c->plan->glyph_map;
-
- auto *out = c->serializer->start_embed (*this);
- if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
- out->format = format;
-
- hb_map_t klass_mapping;
- Markclass_closure_and_remap_indexes (this+markCoverage, this+markArray, glyphset, &klass_mapping);
-
- if (!klass_mapping.get_population ()) return_trace (false);
- out->classCount = klass_mapping.get_population ();
-
- auto mark_iter =
- + hb_zip (this+markCoverage, this+markArray)
- | hb_filter (glyphset, hb_first)
- ;
-
- auto new_mark_coverage =
- + mark_iter
- | hb_map_retains_sorting (hb_first)
- | hb_map_retains_sorting (glyph_map)
- ;
-
- if (!out->markCoverage.serialize_serialize (c->serializer, new_mark_coverage))
- return_trace (false);
-
- out->markArray.serialize_subset (c, markArray, this,
- (this+markCoverage).iter (),
- &klass_mapping);
-
- auto new_ligature_coverage =
- + hb_iter (this + ligatureCoverage)
- | hb_filter (glyphset)
- | hb_map_retains_sorting (glyph_map)
- ;
-
- if (!out->ligatureCoverage.serialize_serialize (c->serializer, new_ligature_coverage))
- return_trace (false);
-
- out->ligatureArray.serialize_subset (c, ligatureArray, this,
- hb_iter (this+ligatureCoverage), classCount, &klass_mapping);
-
- return_trace (true);
- }
-
- 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:
- HBUINT16 format; /* Format identifier--format = 1 */
- Offset16To<Coverage>
- markCoverage; /* Offset to Mark Coverage table--from
- * beginning of MarkLigPos subtable */
- Offset16To<Coverage>
- ligatureCoverage; /* Offset to Ligature Coverage
- * table--from beginning of MarkLigPos
- * subtable */
- HBUINT16 classCount; /* Number of defined mark classes */
- Offset16To<MarkArray>
- markArray; /* Offset to MarkArray table--from
- * beginning of MarkLigPos subtable */
- Offset16To<LigatureArray>
- ligatureArray; /* Offset to LigatureArray table--from
- * beginning of MarkLigPos subtable */
- public:
- DEFINE_SIZE_STATIC (12);
-};
-
-
-struct MarkLigPos
-{
- template <typename context_t, typename ...Ts>
- typename context_t::return_t dispatch (context_t *c, Ts&&... ds) 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, std::forward<Ts> (ds)...));
- default:return_trace (c->default_return_value ());
- }
- }
-
- protected:
- union {
- HBUINT16 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
-{
- bool intersects (const hb_set_t *glyphs) const
- {
- return (this+mark1Coverage).intersects (glyphs) &&
- (this+mark2Coverage).intersects (glyphs);
- }
-
- void closure_lookups (hb_closure_lookups_context_t *c) const {}
-
- void collect_variation_indices (hb_collect_variation_indices_context_t *c) const
- {
- + hb_zip (this+mark1Coverage, this+mark1Array)
- | hb_filter (c->glyph_set, hb_first)
- | hb_map (hb_second)
- | hb_apply ([&] (const MarkRecord& record) { record.collect_variation_indices (c, &(this+mark1Array)); })
- ;
-
- hb_map_t klass_mapping;
- Markclass_closure_and_remap_indexes (this+mark1Coverage, this+mark1Array, *c->glyph_set, &klass_mapping);
-
- unsigned mark2_count = (this+mark2Array).rows;
- auto mark2_iter =
- + hb_zip (this+mark2Coverage, hb_range (mark2_count))
- | hb_filter (c->glyph_set, hb_first)
- | hb_map (hb_second)
- ;
-
- hb_sorted_vector_t<unsigned> mark2_indexes;
- for (const unsigned row : mark2_iter)
- {
- + hb_range ((unsigned) classCount)
- | hb_filter (klass_mapping)
- | hb_map ([&] (const unsigned col) { return row * (unsigned) classCount + col; })
- | hb_sink (mark2_indexes)
- ;
- }
- (this+mark2Array).collect_variation_indices (c, mark2_indexes.iter ());
- }
-
- void collect_glyphs (hb_collect_glyphs_context_t *c) const
- {
- if (unlikely (!(this+mark1Coverage).collect_coverage (c->input))) return;
- if (unlikely (!(this+mark2Coverage).collect_coverage (c->input))) return;
- }
-
- const Coverage &get_coverage () const { return this+mark1Coverage; }
-
- bool apply (hb_ot_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_ot_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);
- unsigned unsafe_from;
- if (!skippy_iter.prev (&unsafe_from))
- {
- buffer->unsafe_to_concat_from_outbuffer (unsafe_from, buffer->idx + 1);
- return_trace (false);
- }
-
- if (!_hb_glyph_info_is_mark (&buffer->info[skippy_iter.idx]))
- {
- buffer->unsafe_to_concat_from_outbuffer (skippy_iter.idx, buffer->idx + 1);
- 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. */
- buffer->unsafe_to_concat_from_outbuffer (skippy_iter.idx, buffer->idx + 1);
- return_trace (false);
-
- good:
- unsigned int mark2_index = (this+mark2Coverage).get_coverage (buffer->info[j].codepoint);
- if (mark2_index == NOT_COVERED)
- {
- buffer->unsafe_to_concat_from_outbuffer (skippy_iter.idx, buffer->idx + 1);
- return_trace (false);
- }
-
- return_trace ((this+mark1Array).apply (c, mark1_index, mark2_index, this+mark2Array, classCount, j));
- }
-
- bool subset (hb_subset_context_t *c) const
- {
- TRACE_SUBSET (this);
- const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
- const hb_map_t &glyph_map = *c->plan->glyph_map;
-
- auto *out = c->serializer->start_embed (*this);
- if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
- out->format = format;
-
- hb_map_t klass_mapping;
- Markclass_closure_and_remap_indexes (this+mark1Coverage, this+mark1Array, glyphset, &klass_mapping);
-
- if (!klass_mapping.get_population ()) return_trace (false);
- out->classCount = klass_mapping.get_population ();
-
- auto mark1_iter =
- + hb_zip (this+mark1Coverage, this+mark1Array)
- | hb_filter (glyphset, hb_first)
- ;
-
- hb_sorted_vector_t<hb_codepoint_t> new_coverage;
- + mark1_iter
- | hb_map (hb_first)
- | hb_map (glyph_map)
- | hb_sink (new_coverage)
- ;
-
- if (!out->mark1Coverage.serialize_serialize (c->serializer, new_coverage.iter ()))
- return_trace (false);
-
- out->mark1Array.serialize_subset (c, mark1Array, this,
- (this+mark1Coverage).iter (),
- &klass_mapping);
-
- unsigned mark2count = (this+mark2Array).rows;
- auto mark2_iter =
- + hb_zip (this+mark2Coverage, hb_range (mark2count))
- | hb_filter (glyphset, hb_first)
- ;
-
- new_coverage.reset ();
- + mark2_iter
- | hb_map (hb_first)
- | hb_map (glyph_map)
- | hb_sink (new_coverage)
- ;
-
- if (!out->mark2Coverage.serialize_serialize (c->serializer, new_coverage.iter ()))
- return_trace (false);
-
- hb_sorted_vector_t<unsigned> mark2_indexes;
- for (const unsigned row : + mark2_iter
- | hb_map (hb_second))
- {
- + hb_range ((unsigned) classCount)
- | hb_filter (klass_mapping)
- | hb_map ([&] (const unsigned col) { return row * (unsigned) classCount + col; })
- | hb_sink (mark2_indexes)
- ;
- }
-
- out->mark2Array.serialize_subset (c, mark2Array, this, mark2_iter.len (), mark2_indexes.iter ());
-
- return_trace (true);
- }
-
- 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:
- HBUINT16 format; /* Format identifier--format = 1 */
- Offset16To<Coverage>
- mark1Coverage; /* Offset to Combining Mark1 Coverage
- * table--from beginning of MarkMarkPos
- * subtable */
- Offset16To<Coverage>
- mark2Coverage; /* Offset to Combining Mark2 Coverage
- * table--from beginning of MarkMarkPos
- * subtable */
- HBUINT16 classCount; /* Number of defined mark classes */
- Offset16To<MarkArray>
- mark1Array; /* Offset to Mark1Array table--from
- * beginning of MarkMarkPos subtable */
- Offset16To<Mark2Array>
- mark2Array; /* Offset to Mark2Array table--from
- * beginning of MarkMarkPos subtable */
- public:
- DEFINE_SIZE_STATIC (12);
-};
-
-struct MarkMarkPos
-{
- template <typename context_t, typename ...Ts>
- typename context_t::return_t dispatch (context_t *c, Ts&&... ds) 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, std::forward<Ts> (ds)...));
- default:return_trace (c->default_return_value ());
- }
- }
-
- protected:
- union {
- HBUINT16 format; /* Format identifier */
- MarkMarkPosFormat1 format1;
- } u;
-};
-
-
-struct ContextPos : Context {};
-
-struct ChainContextPos : ChainContext {};
-
-struct ExtensionPos : Extension<ExtensionPos>
-{
- typedef struct PosLookupSubTable SubTable;
-};
-
-
-
-/*
- * PosLookup
- */
-
-
-struct PosLookupSubTable
-{
- friend struct Lookup;
- 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, typename ...Ts>
- typename context_t::return_t dispatch (context_t *c, unsigned int lookup_type, Ts&&... ds) const
- {
- TRACE_DISPATCH (this, lookup_type);
- switch (lookup_type) {
- case Single: return_trace (u.single.dispatch (c, std::forward<Ts> (ds)...));
- case Pair: return_trace (u.pair.dispatch (c, std::forward<Ts> (ds)...));
- case Cursive: return_trace (u.cursive.dispatch (c, std::forward<Ts> (ds)...));
- case MarkBase: return_trace (u.markBase.dispatch (c, std::forward<Ts> (ds)...));
- case MarkLig: return_trace (u.markLig.dispatch (c, std::forward<Ts> (ds)...));
- case MarkMark: return_trace (u.markMark.dispatch (c, std::forward<Ts> (ds)...));
- case Context: return_trace (u.context.dispatch (c, std::forward<Ts> (ds)...));
- case ChainContext: return_trace (u.chainContext.dispatch (c, std::forward<Ts> (ds)...));
- case Extension: return_trace (u.extension.dispatch (c, std::forward<Ts> (ds)...));
- default: return_trace (c->default_return_value ());
- }
- }
-
- bool intersects (const hb_set_t *glyphs, unsigned int lookup_type) const
- {
- hb_intersects_context_t c (glyphs);
- return dispatch (&c, lookup_type);
- }
-
- protected:
- union {
- SinglePos single;
- PairPos pair;
- CursivePos cursive;
- MarkBasePos markBase;
- MarkLigPos markLig;
- MarkMarkPos markMark;
- ContextPos context;
- ChainContextPos chainContext;
- ExtensionPos extension;
- } u;
- public:
- DEFINE_SIZE_MIN (0);
-};
-
-
-struct PosLookup : Lookup
-{
- typedef struct PosLookupSubTable SubTable;
-
- const SubTable& get_subtable (unsigned int i) const
- { return Lookup::get_subtable<SubTable> (i); }
-
- bool is_reverse () const
- {
- return false;
- }
-
- bool apply (hb_ot_apply_context_t *c) const
- {
- TRACE_APPLY (this);
- return_trace (dispatch (c));
- }
-
- bool intersects (const hb_set_t *glyphs) const
- {
- hb_intersects_context_t c (glyphs);
- return dispatch (&c);
- }
-
- hb_collect_glyphs_context_t::return_t collect_glyphs (hb_collect_glyphs_context_t *c) const
- { return dispatch (c); }
-
- hb_closure_lookups_context_t::return_t closure_lookups (hb_closure_lookups_context_t *c, unsigned this_index) const
- {
- if (c->is_lookup_visited (this_index))
- return hb_closure_lookups_context_t::default_return_value ();
-
- c->set_lookup_visited (this_index);
- if (!intersects (c->glyphs))
- {
- c->set_lookup_inactive (this_index);
- return hb_closure_lookups_context_t::default_return_value ();
- }
- c->set_recurse_func (dispatch_closure_lookups_recurse_func);
-
- hb_closure_lookups_context_t::return_t ret = dispatch (c);
- return ret;
- }
-
- template <typename set_t>
- void collect_coverage (set_t *glyphs) const
- {
- hb_collect_coverage_context_t<set_t> c (glyphs);
- dispatch (&c);
- }
-
- static inline bool apply_recurse_func (hb_ot_apply_context_t *c, unsigned int lookup_index);
-
- template <typename context_t>
- static typename context_t::return_t dispatch_recurse_func (context_t *c, unsigned int lookup_index);
-
- HB_INTERNAL static hb_closure_lookups_context_t::return_t dispatch_closure_lookups_recurse_func (hb_closure_lookups_context_t *c, unsigned this_index);
-
- template <typename context_t, typename ...Ts>
- typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const
- { return Lookup::dispatch<SubTable> (c, std::forward<Ts> (ds)...); }
-
- bool subset (hb_subset_context_t *c) const
- { return Lookup::subset<SubTable> (c); }
-
- bool sanitize (hb_sanitize_context_t *c) const
- { return Lookup::sanitize<SubTable> (c); }
-};
-
-/*
- * GPOS -- Glyph Positioning
- * https://docs.microsoft.com/en-us/typography/opentype/spec/gpos
- */
-
-struct GPOS : GSUBGPOS
-{
- static constexpr hb_tag_t tableTag = HB_OT_TAG_GPOS;
-
- const PosLookup& get_lookup (unsigned int i) const
- { return static_cast<const 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);
-
- bool subset (hb_subset_context_t *c) const
- {
- hb_subset_layout_context_t l (c, tableTag, c->plan->gpos_lookups, c->plan->gpos_langsys, c->plan->gpos_features);
- return GSUBGPOS::subset<PosLookup> (&l);
- }
-
- bool sanitize (hb_sanitize_context_t *c) const
- { return GSUBGPOS::sanitize<PosLookup> (c); }
-
- HB_INTERNAL bool is_blocklisted (hb_blob_t *blob,
- hb_face_t *face) const;
-
- void collect_variation_indices (hb_collect_variation_indices_context_t *c) const
- {
- for (unsigned i = 0; i < GSUBGPOS::get_lookup_count (); i++)
- {
- if (!c->gpos_lookups->has (i)) continue;
- const PosLookup &l = get_lookup (i);
- l.dispatch (c);
- }
- }
-
- void closure_lookups (hb_face_t *face,
- const hb_set_t *glyphs,
- hb_set_t *lookup_indexes /* IN/OUT */) const
- { GSUBGPOS::closure_lookups<PosLookup> (face, glyphs, lookup_indexes); }
-
- typedef GSUBGPOS::accelerator_t<GPOS> accelerator_t;
-};
-
-
-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 len,
- 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;
-
- pos[i].attach_chain() = 0;
-
- unsigned int j = (int) i + chain;
-
- if (unlikely (j >= len))
- return;
-
- propagate_attachment_offsets (pos, len, 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_UNUSED)
-{
- //_hb_buffer_assert_gsubgpos_vars (buffer);
-}
-
-void
-GPOS::position_finish_offsets (hb_font_t *font, 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 i = 0; i < len; i++)
- propagate_attachment_offsets (pos, len, i, direction);
-
- if (unlikely (font->slant))
- {
- for (unsigned i = 0; i < len; i++)
- if (unlikely (pos[i].y_offset))
- pos[i].x_offset += _hb_roundf (font->slant_xy * pos[i].y_offset);
- }
-}
-
-
-struct GPOS_accelerator_t : GPOS::accelerator_t {
- GPOS_accelerator_t (hb_face_t *face) : GPOS::accelerator_t (face) {}
-};
+#include "OT/Layout/GPOS/GPOS.hh"
+namespace OT {
+namespace Layout {
+namespace GPOS_impl {
+// TODO(garretrieger): Move into new layout directory.
/* Out-of-class implementation for methods recursing */
-
#ifndef HB_NO_OT_LAYOUT
template <typename context_t>
/*static*/ typename context_t::return_t PosLookup::dispatch_recurse_func (context_t *c, unsigned int lookup_index)
return l.dispatch (c);
}
-/*static*/ inline hb_closure_lookups_context_t::return_t PosLookup::dispatch_closure_lookups_recurse_func (hb_closure_lookups_context_t *c, unsigned this_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 PosLookup &l = c->face->table.GPOS.get_relaxed ()->table->get_lookup (this_index);
return l.closure_lookups (c, this_index);
}
-/*static*/ bool PosLookup::apply_recurse_func (hb_ot_apply_context_t *c, unsigned int lookup_index)
+template <>
+inline bool PosLookup::dispatch_recurse_func<hb_ot_apply_context_t> (hb_ot_apply_context_t *c, unsigned int lookup_index)
{
- const PosLookup &l = c->face->table.GPOS.get_relaxed ()->table->get_lookup (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
-
+} /* namespace GPOS_impl */
+} /* namespace Layout */
} /* namespace OT */
projects / platform / upstream / harfbuzz.git / blobdiff