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diff --git a/Build/source/libs/harfbuzz/harfbuzz-0.9.15/src/hb-ot-layout-gpos-table.hh b/Build/source/libs/harfbuzz/harfbuzz-0.9.15/src/hb-ot-layout-gpos-table.hh
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--- a/Build/source/libs/harfbuzz/harfbuzz-0.9.15/src/hb-ot-layout-gpos-table.hh
+++ /dev/null
@@ -1,1648 +0,0 @@
-/*
- * Copyright © 2007,2008,2009,2010 Red Hat, Inc.
- * Copyright © 2010,2012 Google, Inc.
- *
- * This is part of HarfBuzz, a text shaping library.
- *
- * Permission is hereby granted, without written agreement and without
- * license or royalty fees, to use, copy, modify, and distribute this
- * software and its documentation for any purpose, provided that the
- * above copyright notice and the following two paragraphs appear in
- * all copies of this software.
- *
- * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
- * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
- * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
- * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
- * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
- * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
- * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
- *
- * Red Hat Author(s): Behdad Esfahbod
- * Google Author(s): Behdad Esfahbod
- */
-
-#ifndef HB_OT_LAYOUT_GPOS_TABLE_HH
-#define HB_OT_LAYOUT_GPOS_TABLE_HH
-
-#include "hb-ot-layout-gsubgpos-private.hh"
-
-
-namespace OT {
-
-
-/* buffer **position** var allocations */
-#define attach_lookback() var.u16[0] /* number of glyphs to go back to attach this glyph to its base */
-#define cursive_chain() var.i16[1] /* character to which this connects, may be positive or negative */
-
-
-/* Shared Tables: ValueRecord, Anchor Table, and MarkArray */
-
-typedef USHORT Value;
-
-typedef Value ValueRecord[VAR];
-
-struct ValueFormat : USHORT
-{
- enum Flags {
- xPlacement = 0x0001, /* Includes horizontal adjustment for placement */
- yPlacement = 0x0002, /* Includes vertical adjustment for placement */
- xAdvance = 0x0004, /* Includes horizontal adjustment for advance */
- yAdvance = 0x0008, /* Includes vertical adjustment for advance */
- xPlaDevice = 0x0010, /* Includes horizontal Device table for placement */
- yPlaDevice = 0x0020, /* Includes vertical Device table for placement */
- xAdvDevice = 0x0040, /* Includes horizontal Device table for advance */
- yAdvDevice = 0x0080, /* Includes vertical Device table for advance */
- ignored = 0x0F00, /* Was used in TrueType Open for MM fonts */
- reserved = 0xF000, /* For future use */
-
- devices = 0x00F0 /* Mask for having any Device table */
- };
-
-/* All fields are options. Only those available advance the value pointer. */
-#if 0
- SHORT xPlacement; /* Horizontal adjustment for
- * placement--in design units */
- SHORT yPlacement; /* Vertical adjustment for
- * placement--in design units */
- SHORT xAdvance; /* Horizontal adjustment for
- * advance--in design units (only used
- * for horizontal writing) */
- SHORT yAdvance; /* Vertical adjustment for advance--in
- * design units (only used for vertical
- * writing) */
- Offset xPlaDevice; /* Offset to Device table for
- * horizontal placement--measured from
- * beginning of PosTable (may be NULL) */
- Offset yPlaDevice; /* Offset to Device table for vertical
- * placement--measured from beginning
- * of PosTable (may be NULL) */
- Offset xAdvDevice; /* Offset to Device table for
- * horizontal advance--measured from
- * beginning of PosTable (may be NULL) */
- Offset yAdvDevice; /* Offset to Device table for vertical
- * advance--measured from beginning of
- * PosTable (may be NULL) */
-#endif
-
- inline unsigned int get_len (void) const
- { return _hb_popcount32 ((unsigned int) *this); }
- inline unsigned int get_size (void) const
- { return get_len () * Value::static_size; }
-
- void apply_value (hb_font_t *font,
- hb_direction_t direction,
- const void *base,
- const Value *values,
- hb_glyph_position_t &glyph_pos) const
- {
- unsigned int x_ppem, y_ppem;
- unsigned int format = *this;
- hb_bool_t horizontal = HB_DIRECTION_IS_HORIZONTAL (direction);
-
- if (!format) return;
-
- if (format & xPlacement) glyph_pos.x_offset += font->em_scale_x (get_short (values++));
- if (format & yPlacement) glyph_pos.y_offset += font->em_scale_y (get_short (values++));
- if (format & xAdvance) {
- if (likely (horizontal)) glyph_pos.x_advance += font->em_scale_x (get_short (values++)); else 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++)); else values++;
- }
-
- if (!has_device ()) return;
-
- x_ppem = font->x_ppem;
- y_ppem = font->y_ppem;
-
- if (!x_ppem && !y_ppem) return;
-
- /* pixel -> fractional pixel */
- if (format & xPlaDevice) {
- if (x_ppem) glyph_pos.x_offset += (base + get_device (values++)).get_x_delta (font); else values++;
- }
- if (format & yPlaDevice) {
- if (y_ppem) glyph_pos.y_offset += (base + get_device (values++)).get_y_delta (font); else values++;
- }
- if (format & xAdvDevice) {
- if (horizontal && x_ppem) glyph_pos.x_advance += (base + get_device (values++)).get_x_delta (font); else values++;
- }
- if (format & yAdvDevice) {
- /* y_advance values grow downward but font-space grows upward, hence negation */
- if (!horizontal && y_ppem) glyph_pos.y_advance -= (base + get_device (values++)).get_y_delta (font); else values++;
- }
- }
-
- private:
- inline bool sanitize_value_devices (hb_sanitize_context_t *c, void *base, Value *values) {
- unsigned int format = *this;
-
- if (format & xPlacement) values++;
- if (format & yPlacement) values++;
- if (format & xAdvance) values++;
- if (format & yAdvance) values++;
-
- if ((format & xPlaDevice) && !get_device (values++).sanitize (c, base)) return false;
- if ((format & yPlaDevice) && !get_device (values++).sanitize (c, base)) return false;
- if ((format & xAdvDevice) && !get_device (values++).sanitize (c, base)) return false;
- if ((format & yAdvDevice) && !get_device (values++).sanitize (c, base)) return false;
-
- return true;
- }
-
- static inline OffsetTo<Device>& get_device (Value* value)
- { return *CastP<OffsetTo<Device> > (value); }
- static inline const OffsetTo<Device>& get_device (const Value* value)
- { return *CastP<OffsetTo<Device> > (value); }
-
- static inline const SHORT& get_short (const Value* value)
- { return *CastP<SHORT> (value); }
-
- public:
-
- inline bool has_device (void) const {
- unsigned int format = *this;
- return (format & devices) != 0;
- }
-
- inline bool sanitize_value (hb_sanitize_context_t *c, void *base, Value *values) {
- TRACE_SANITIZE (this);
- return TRACE_RETURN (c->check_range (values, get_size ()) && (!has_device () || sanitize_value_devices (c, base, values)));
- }
-
- inline bool sanitize_values (hb_sanitize_context_t *c, void *base, Value *values, unsigned int count) {
- TRACE_SANITIZE (this);
- unsigned int len = get_len ();
-
- if (!c->check_array (values, get_size (), count)) return TRACE_RETURN (false);
-
- if (!has_device ()) return TRACE_RETURN (true);
-
- for (unsigned int i = 0; i < count; i++) {
- if (!sanitize_value_devices (c, base, values))
- return TRACE_RETURN (false);
- values += len;
- }
-
- return TRACE_RETURN (true);
- }
-
- /* Just sanitize referenced Device tables. Doesn't check the values themselves. */
- inline bool sanitize_values_stride_unsafe (hb_sanitize_context_t *c, void *base, Value *values, unsigned int count, unsigned int stride) {
- TRACE_SANITIZE (this);
-
- if (!has_device ()) return TRACE_RETURN (true);
-
- for (unsigned int i = 0; i < count; i++) {
- if (!sanitize_value_devices (c, base, values))
- return TRACE_RETURN (false);
- values += stride;
- }
-
- return TRACE_RETURN (true);
- }
-};
-
-
-struct AnchorFormat1
-{
- inline void get_anchor (hb_font_t *font, hb_codepoint_t glyph_id HB_UNUSED,
- hb_position_t *x, hb_position_t *y) const
- {
- *x = font->em_scale_x (xCoordinate);
- *y = font->em_scale_y (yCoordinate);
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- return TRACE_RETURN (c->check_struct (this));
- }
-
- protected:
- USHORT format; /* Format identifier--format = 1 */
- SHORT xCoordinate; /* Horizontal value--in design units */
- SHORT yCoordinate; /* Vertical value--in design units */
- public:
- DEFINE_SIZE_STATIC (6);
-};
-
-struct AnchorFormat2
-{
- inline void get_anchor (hb_font_t *font, hb_codepoint_t glyph_id,
- hb_position_t *x, hb_position_t *y) const
- {
- unsigned int x_ppem = font->x_ppem;
- unsigned int y_ppem = font->y_ppem;
- hb_position_t cx, cy;
- hb_bool_t ret = false;
-
- if (x_ppem || y_ppem)
- ret = font->get_glyph_contour_point_for_origin (glyph_id, anchorPoint, HB_DIRECTION_LTR, &cx, &cy);
- *x = x_ppem && ret ? cx : font->em_scale_x (xCoordinate);
- *y = y_ppem && ret ? cy : font->em_scale_y (yCoordinate);
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- return TRACE_RETURN (c->check_struct (this));
- }
-
- protected:
- USHORT format; /* Format identifier--format = 2 */
- SHORT xCoordinate; /* Horizontal value--in design units */
- SHORT yCoordinate; /* Vertical value--in design units */
- USHORT anchorPoint; /* Index to glyph contour point */
- public:
- DEFINE_SIZE_STATIC (8);
-};
-
-struct AnchorFormat3
-{
- inline void get_anchor (hb_font_t *font, hb_codepoint_t glyph_id HB_UNUSED,
- hb_position_t *x, hb_position_t *y) const
- {
- *x = font->em_scale_x (xCoordinate);
- *y = font->em_scale_y (yCoordinate);
-
- if (font->x_ppem)
- *x += (this+xDeviceTable).get_x_delta (font);
- if (font->y_ppem)
- *y += (this+yDeviceTable).get_x_delta (font);
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- return TRACE_RETURN (c->check_struct (this) && xDeviceTable.sanitize (c, this) && yDeviceTable.sanitize (c, this));
- }
-
- protected:
- USHORT format; /* Format identifier--format = 3 */
- SHORT xCoordinate; /* Horizontal value--in design units */
- SHORT yCoordinate; /* Vertical value--in design units */
- OffsetTo<Device>
- xDeviceTable; /* Offset to Device table for X
- * coordinate-- from beginning of
- * Anchor table (may be NULL) */
- OffsetTo<Device>
- yDeviceTable; /* Offset to Device table for Y
- * coordinate-- from beginning of
- * Anchor table (may be NULL) */
- public:
- DEFINE_SIZE_STATIC (10);
-};
-
-struct Anchor
-{
- inline void get_anchor (hb_font_t *font, hb_codepoint_t glyph_id,
- hb_position_t *x, hb_position_t *y) const
- {
- *x = *y = 0;
- switch (u.format) {
- case 1: u.format1.get_anchor (font, glyph_id, x, y); return;
- case 2: u.format2.get_anchor (font, glyph_id, x, y); return;
- case 3: u.format3.get_anchor (font, glyph_id, x, y); return;
- default: return;
- }
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- if (!u.format.sanitize (c)) return TRACE_RETURN (false);
- switch (u.format) {
- case 1: return TRACE_RETURN (u.format1.sanitize (c));
- case 2: return TRACE_RETURN (u.format2.sanitize (c));
- case 3: return TRACE_RETURN (u.format3.sanitize (c));
- default:return TRACE_RETURN (true);
- }
- }
-
- protected:
- union {
- USHORT format; /* Format identifier */
- AnchorFormat1 format1;
- AnchorFormat2 format2;
- AnchorFormat3 format3;
- } u;
- public:
- DEFINE_SIZE_UNION (2, format);
-};
-
-
-struct AnchorMatrix
-{
- inline const Anchor& get_anchor (unsigned int row, unsigned int col, unsigned int cols, bool *found) const {
- *found = false;
- if (unlikely (row >= rows || col >= cols)) return Null(Anchor);
- *found = !matrix[row * cols + col].is_null ();
- return this+matrix[row * cols + col];
- }
-
- inline bool sanitize (hb_sanitize_context_t *c, unsigned int cols) {
- TRACE_SANITIZE (this);
- if (!c->check_struct (this)) return TRACE_RETURN (false);
- if (unlikely (rows > 0 && cols >= ((unsigned int) -1) / rows)) return TRACE_RETURN (false);
- unsigned int count = rows * cols;
- if (!c->check_array (matrix, matrix[0].static_size, count)) return TRACE_RETURN (false);
- for (unsigned int i = 0; i < count; i++)
- if (!matrix[i].sanitize (c, this)) return TRACE_RETURN (false);
- return TRACE_RETURN (true);
- }
-
- USHORT rows; /* Number of rows */
- protected:
- OffsetTo<Anchor>
- matrix[VAR]; /* Matrix of offsets to Anchor tables--
- * from beginning of AnchorMatrix table */
- public:
- DEFINE_SIZE_ARRAY (2, matrix);
-};
-
-
-struct MarkRecord
-{
- friend struct MarkArray;
-
- inline bool sanitize (hb_sanitize_context_t *c, void *base) {
- TRACE_SANITIZE (this);
- return TRACE_RETURN (c->check_struct (this) && markAnchor.sanitize (c, base));
- }
-
- protected:
- USHORT klass; /* Class defined for this mark */
- OffsetTo<Anchor>
- markAnchor; /* Offset to Anchor table--from
- * beginning of MarkArray table */
- public:
- DEFINE_SIZE_STATIC (4);
-};
-
-struct MarkArray : ArrayOf<MarkRecord> /* Array of MarkRecords--in Coverage order */
-{
- inline bool apply (hb_apply_context_t *c,
- unsigned int mark_index, unsigned int glyph_index,
- const AnchorMatrix &anchors, unsigned int class_count,
- unsigned int glyph_pos) const
- {
- TRACE_APPLY (this);
- const MarkRecord &record = ArrayOf<MarkRecord>::operator[](mark_index);
- unsigned int mark_class = record.klass;
-
- const Anchor& mark_anchor = this + record.markAnchor;
- bool found;
- const Anchor& glyph_anchor = anchors.get_anchor (glyph_index, mark_class, class_count, &found);
- /* If this subtable doesn't have an anchor for this base and this class,
- * return false such that the subsequent subtables have a chance at it. */
- if (unlikely (!found)) return TRACE_RETURN (false);
-
- hb_position_t mark_x, mark_y, base_x, base_y;
-
- mark_anchor.get_anchor (c->font, c->buffer->cur().codepoint, &mark_x, &mark_y);
- glyph_anchor.get_anchor (c->font, c->buffer->info[glyph_pos].codepoint, &base_x, &base_y);
-
- hb_glyph_position_t &o = c->buffer->cur_pos();
- o.x_offset = base_x - mark_x;
- o.y_offset = base_y - mark_y;
- o.attach_lookback() = c->buffer->idx - glyph_pos;
-
- c->buffer->idx++;
- return TRACE_RETURN (true);
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- return TRACE_RETURN (ArrayOf<MarkRecord>::sanitize (c, this));
- }
-};
-
-
-/* Lookups */
-
-struct SinglePosFormat1
-{
- inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
- {
- TRACE_COLLECT_GLYPHS (this);
- (this+coverage).add_coverage (c->input);
- }
-
- inline const Coverage &get_coverage (void) const
- {
- return this+coverage;
- }
-
- inline bool apply (hb_apply_context_t *c) const
- {
- TRACE_APPLY (this);
- unsigned int index = (this+coverage).get_coverage (c->buffer->cur().codepoint);
- if (likely (index == NOT_COVERED)) return TRACE_RETURN (false);
-
- valueFormat.apply_value (c->font, c->direction, this,
- values, c->buffer->cur_pos());
-
- c->buffer->idx++;
- return TRACE_RETURN (true);
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- return TRACE_RETURN (c->check_struct (this) && coverage.sanitize (c, this) && valueFormat.sanitize_value (c, this, values));
- }
-
- protected:
- USHORT format; /* Format identifier--format = 1 */
- OffsetTo<Coverage>
- coverage; /* Offset to Coverage table--from
- * beginning of subtable */
- ValueFormat valueFormat; /* Defines the types of data in the
- * ValueRecord */
- ValueRecord values; /* Defines positioning
- * value(s)--applied to all glyphs in
- * the Coverage table */
- public:
- DEFINE_SIZE_ARRAY (6, values);
-};
-
-struct SinglePosFormat2
-{
- inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
- {
- TRACE_COLLECT_GLYPHS (this);
- (this+coverage).add_coverage (c->input);
- }
-
- inline const Coverage &get_coverage (void) const
- {
- return this+coverage;
- }
-
- inline bool apply (hb_apply_context_t *c) const
- {
- TRACE_APPLY (this);
- unsigned int index = (this+coverage).get_coverage (c->buffer->cur().codepoint);
- if (likely (index == NOT_COVERED)) return TRACE_RETURN (false);
-
- if (likely (index >= valueCount)) return TRACE_RETURN (false);
-
- valueFormat.apply_value (c->font, c->direction, this,
- &values[index * valueFormat.get_len ()],
- c->buffer->cur_pos());
-
- c->buffer->idx++;
- return TRACE_RETURN (true);
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- return TRACE_RETURN (c->check_struct (this) && coverage.sanitize (c, this) && valueFormat.sanitize_values (c, this, values, valueCount));
- }
-
- protected:
- USHORT format; /* Format identifier--format = 2 */
- OffsetTo<Coverage>
- coverage; /* Offset to Coverage table--from
- * beginning of subtable */
- ValueFormat valueFormat; /* Defines the types of data in the
- * ValueRecord */
- USHORT valueCount; /* Number of ValueRecords */
- ValueRecord values; /* Array of ValueRecords--positioning
- * values applied to glyphs */
- public:
- DEFINE_SIZE_ARRAY (8, values);
-};
-
-struct SinglePos
-{
- template <typename context_t>
- inline typename context_t::return_t dispatch (context_t *c) const
- {
- TRACE_DISPATCH (this);
- switch (u.format) {
- case 1: return TRACE_RETURN (c->dispatch (u.format1));
- case 2: return TRACE_RETURN (c->dispatch (u.format2));
- default:return TRACE_RETURN (c->default_return_value ());
- }
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- if (!u.format.sanitize (c)) return TRACE_RETURN (false);
- switch (u.format) {
- case 1: return TRACE_RETURN (u.format1.sanitize (c));
- case 2: return TRACE_RETURN (u.format2.sanitize (c));
- default:return TRACE_RETURN (true);
- }
- }
-
- protected:
- union {
- USHORT format; /* Format identifier */
- SinglePosFormat1 format1;
- SinglePosFormat2 format2;
- } u;
-};
-
-
-struct PairValueRecord
-{
- friend struct PairSet;
-
- protected:
- GlyphID secondGlyph; /* GlyphID of second glyph in the
- * pair--first glyph is listed in the
- * Coverage table */
- ValueRecord values; /* Positioning data for the first glyph
- * followed by for second glyph */
- public:
- DEFINE_SIZE_ARRAY (2, values);
-};
-
-struct PairSet
-{
- friend struct PairPosFormat1;
-
- inline void collect_glyphs (hb_collect_glyphs_context_t *c,
- const ValueFormat *valueFormats) const
- {
- TRACE_COLLECT_GLYPHS (this);
- unsigned int len1 = valueFormats[0].get_len ();
- unsigned int len2 = valueFormats[1].get_len ();
- unsigned int record_size = USHORT::static_size * (1 + len1 + len2);
-
- const PairValueRecord *record = CastP<PairValueRecord> (array);
- unsigned int count = len;
- for (unsigned int i = 0; i < count; i++)
- {
- c->input->add (record->secondGlyph);
- record = &StructAtOffset<PairValueRecord> (record, record_size);
- }
- }
-
- inline bool apply (hb_apply_context_t *c,
- const ValueFormat *valueFormats,
- unsigned int pos) const
- {
- TRACE_APPLY (this);
- unsigned int len1 = valueFormats[0].get_len ();
- unsigned int len2 = valueFormats[1].get_len ();
- unsigned int record_size = USHORT::static_size * (1 + len1 + len2);
-
- const PairValueRecord *record = CastP<PairValueRecord> (array);
- unsigned int count = len;
- for (unsigned int i = 0; i < count; i++)
- {
- /* TODO bsearch */
- if (c->buffer->info[pos].codepoint == record->secondGlyph)
- {
- valueFormats[0].apply_value (c->font, c->direction, this,
- &record->values[0], c->buffer->cur_pos());
- valueFormats[1].apply_value (c->font, c->direction, this,
- &record->values[len1], c->buffer->pos[pos]);
- if (len2)
- pos++;
- c->buffer->idx = pos;
- return TRACE_RETURN (true);
- }
- record = &StructAtOffset<PairValueRecord> (record, record_size);
- }
-
- return TRACE_RETURN (false);
- }
-
- struct sanitize_closure_t {
- void *base;
- ValueFormat *valueFormats;
- unsigned int len1; /* valueFormats[0].get_len() */
- unsigned int stride; /* 1 + len1 + len2 */
- };
-
- inline bool sanitize (hb_sanitize_context_t *c, const sanitize_closure_t *closure) {
- TRACE_SANITIZE (this);
- if (!(c->check_struct (this)
- && c->check_array (array, USHORT::static_size * closure->stride, len))) return TRACE_RETURN (false);
-
- unsigned int count = len;
- PairValueRecord *record = CastP<PairValueRecord> (array);
- return TRACE_RETURN (closure->valueFormats[0].sanitize_values_stride_unsafe (c, closure->base, &record->values[0], count, closure->stride)
- && closure->valueFormats[1].sanitize_values_stride_unsafe (c, closure->base, &record->values[closure->len1], count, closure->stride));
- }
-
- protected:
- USHORT len; /* Number of PairValueRecords */
- USHORT array[VAR]; /* Array of PairValueRecords--ordered
- * by GlyphID of the second glyph */
- public:
- DEFINE_SIZE_ARRAY (2, array);
-};
-
-struct PairPosFormat1
-{
- inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
- {
- TRACE_COLLECT_GLYPHS (this);
- (this+coverage).add_coverage (c->input);
- unsigned int count = pairSet.len;
- for (unsigned int i = 0; i < count; i++)
- (this+pairSet[i]).collect_glyphs (c, &valueFormat1);
- }
-
- inline const Coverage &get_coverage (void) const
- {
- return this+coverage;
- }
-
- inline bool apply (hb_apply_context_t *c) const
- {
- TRACE_APPLY (this);
- hb_apply_context_t::skipping_forward_iterator_t skippy_iter (c, c->buffer->idx, 1);
- if (skippy_iter.has_no_chance ()) return TRACE_RETURN (false);
-
- unsigned int index = (this+coverage).get_coverage (c->buffer->cur().codepoint);
- if (likely (index == NOT_COVERED)) return TRACE_RETURN (false);
-
- if (!skippy_iter.next ()) return TRACE_RETURN (false);
-
- return TRACE_RETURN ((this+pairSet[index]).apply (c, &valueFormat1, skippy_iter.idx));
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
-
- unsigned int len1 = valueFormat1.get_len ();
- unsigned int len2 = valueFormat2.get_len ();
- PairSet::sanitize_closure_t closure = {
- this,
- &valueFormat1,
- len1,
- 1 + len1 + len2
- };
-
- return TRACE_RETURN (c->check_struct (this) && coverage.sanitize (c, this) && pairSet.sanitize (c, this, &closure));
- }
-
- protected:
- USHORT format; /* Format identifier--format = 1 */
- OffsetTo<Coverage>
- coverage; /* Offset to Coverage table--from
- * beginning of subtable */
- ValueFormat valueFormat1; /* Defines the types of data in
- * ValueRecord1--for the first glyph
- * in the pair--may be zero (0) */
- ValueFormat valueFormat2; /* Defines the types of data in
- * ValueRecord2--for the second glyph
- * in the pair--may be zero (0) */
- OffsetArrayOf<PairSet>
- pairSet; /* Array of PairSet tables
- * ordered by Coverage Index */
- public:
- DEFINE_SIZE_ARRAY (10, pairSet);
-};
-
-struct PairPosFormat2
-{
- inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
- {
- TRACE_COLLECT_GLYPHS (this);
- /* (this+coverage).add_coverage (c->input); // Don't need this. */
-
- /* TODO only add values for pairs that have nonzero adjustments. */
-
- unsigned int count1 = class1Count;
- const ClassDef &klass1 = this+classDef1;
- for (unsigned int i = 0; i < count1; i++)
- klass1.add_class (c->input, i);
-
- unsigned int count2 = class2Count;
- const ClassDef &klass2 = this+classDef2;
- for (unsigned int i = 0; i < count2; i++)
- klass2.add_class (c->input, i);
- }
-
- inline const Coverage &get_coverage (void) const
- {
- return this+coverage;
- }
-
- inline bool apply (hb_apply_context_t *c) const
- {
- TRACE_APPLY (this);
- hb_apply_context_t::skipping_forward_iterator_t skippy_iter (c, c->buffer->idx, 1);
- if (skippy_iter.has_no_chance ()) return TRACE_RETURN (false);
-
- unsigned int index = (this+coverage).get_coverage (c->buffer->cur().codepoint);
- if (likely (index == NOT_COVERED)) return TRACE_RETURN (false);
-
- if (!skippy_iter.next ()) return TRACE_RETURN (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 (c->buffer->cur().codepoint);
- unsigned int klass2 = (this+classDef2).get_class (c->buffer->info[skippy_iter.idx].codepoint);
- if (unlikely (klass1 >= class1Count || klass2 >= class2Count)) return TRACE_RETURN (false);
-
- const Value *v = &values[record_len * (klass1 * class2Count + klass2)];
- valueFormat1.apply_value (c->font, c->direction, this,
- v, c->buffer->cur_pos());
- valueFormat2.apply_value (c->font, c->direction, this,
- v + len1, c->buffer->pos[skippy_iter.idx]);
-
- c->buffer->idx = skippy_iter.idx;
- if (len2)
- c->buffer->idx++;
-
- return TRACE_RETURN (true);
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- if (!(c->check_struct (this)
- && coverage.sanitize (c, this)
- && classDef1.sanitize (c, this)
- && classDef2.sanitize (c, this))) return TRACE_RETURN (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_RETURN (c->check_array (values, record_size, count) &&
- valueFormat1.sanitize_values_stride_unsafe (c, this, &values[0], count, stride) &&
- valueFormat2.sanitize_values_stride_unsafe (c, this, &values[len1], count, stride));
- }
-
- protected:
- USHORT format; /* Format identifier--format = 2 */
- OffsetTo<Coverage>
- coverage; /* Offset to Coverage table--from
- * beginning of subtable */
- ValueFormat valueFormat1; /* ValueRecord definition--for the
- * first glyph of the pair--may be zero
- * (0) */
- ValueFormat valueFormat2; /* ValueRecord definition--for the
- * second glyph of the pair--may be
- * zero (0) */
- OffsetTo<ClassDef>
- classDef1; /* Offset to ClassDef table--from
- * beginning of PairPos subtable--for
- * the first glyph of the pair */
- OffsetTo<ClassDef>
- classDef2; /* Offset to ClassDef table--from
- * beginning of PairPos subtable--for
- * the second glyph of the pair */
- USHORT class1Count; /* Number of classes in ClassDef1
- * table--includes Class0 */
- USHORT class2Count; /* Number of classes in ClassDef2
- * table--includes Class0 */
- ValueRecord values; /* Matrix of value pairs:
- * class1-major, class2-minor,
- * Each entry has value1 and value2 */
- public:
- DEFINE_SIZE_ARRAY (16, values);
-};
-
-struct PairPos
-{
- template <typename context_t>
- inline typename context_t::return_t dispatch (context_t *c) const
- {
- TRACE_DISPATCH (this);
- switch (u.format) {
- case 1: return TRACE_RETURN (c->dispatch (u.format1));
- case 2: return TRACE_RETURN (c->dispatch (u.format2));
- default:return TRACE_RETURN (c->default_return_value ());
- }
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- if (!u.format.sanitize (c)) return TRACE_RETURN (false);
- switch (u.format) {
- case 1: return TRACE_RETURN (u.format1.sanitize (c));
- case 2: return TRACE_RETURN (u.format2.sanitize (c));
- default:return TRACE_RETURN (true);
- }
- }
-
- protected:
- union {
- USHORT format; /* Format identifier */
- PairPosFormat1 format1;
- PairPosFormat2 format2;
- } u;
-};
-
-
-struct EntryExitRecord
-{
- friend struct CursivePosFormat1;
-
- inline bool sanitize (hb_sanitize_context_t *c, void *base) {
- TRACE_SANITIZE (this);
- return TRACE_RETURN (entryAnchor.sanitize (c, base) && exitAnchor.sanitize (c, base));
- }
-
- protected:
- OffsetTo<Anchor>
- entryAnchor; /* Offset to EntryAnchor table--from
- * beginning of CursivePos
- * subtable--may be NULL */
- OffsetTo<Anchor>
- exitAnchor; /* Offset to ExitAnchor table--from
- * beginning of CursivePos
- * subtable--may be NULL */
- public:
- DEFINE_SIZE_STATIC (4);
-};
-
-struct CursivePosFormat1
-{
- inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
- {
- TRACE_COLLECT_GLYPHS (this);
- (this+coverage).add_coverage (c->input);
- }
-
- inline const Coverage &get_coverage (void) const
- {
- return this+coverage;
- }
-
- inline bool apply (hb_apply_context_t *c) const
- {
- TRACE_APPLY (this);
-
- /* We don't handle mark glyphs here. */
- if (c->buffer->cur().glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MARK) return TRACE_RETURN (false);
-
- hb_apply_context_t::skipping_forward_iterator_t skippy_iter (c, c->buffer->idx, 1);
- if (skippy_iter.has_no_chance ()) return TRACE_RETURN (false);
-
- const EntryExitRecord &this_record = entryExitRecord[(this+coverage).get_coverage (c->buffer->cur().codepoint)];
- if (!this_record.exitAnchor) return TRACE_RETURN (false);
-
- if (!skippy_iter.next ()) return TRACE_RETURN (false);
-
- const EntryExitRecord &next_record = entryExitRecord[(this+coverage).get_coverage (c->buffer->info[skippy_iter.idx].codepoint)];
- if (!next_record.entryAnchor) return TRACE_RETURN (false);
-
- unsigned int i = c->buffer->idx;
- unsigned int j = skippy_iter.idx;
-
- hb_position_t entry_x, entry_y, exit_x, exit_y;
- (this+this_record.exitAnchor).get_anchor (c->font, c->buffer->info[i].codepoint, &exit_x, &exit_y);
- (this+next_record.entryAnchor).get_anchor (c->font, c->buffer->info[j].codepoint, &entry_x, &entry_y);
-
- hb_glyph_position_t *pos = c->buffer->pos;
-
- hb_position_t d;
- /* Main-direction adjustment */
- switch (c->direction) {
- case HB_DIRECTION_LTR:
- pos[i].x_advance = exit_x + pos[i].x_offset;
-
- d = entry_x + pos[j].x_offset;
- pos[j].x_advance -= d;
- pos[j].x_offset -= d;
- break;
- case HB_DIRECTION_RTL:
- d = exit_x + pos[i].x_offset;
- pos[i].x_advance -= d;
- pos[i].x_offset -= d;
-
- pos[j].x_advance = entry_x + pos[j].x_offset;
- break;
- case HB_DIRECTION_TTB:
- pos[i].y_advance = exit_y + pos[i].y_offset;
-
- d = entry_y + pos[j].y_offset;
- pos[j].y_advance -= d;
- pos[j].y_offset -= d;
- break;
- case HB_DIRECTION_BTT:
- d = exit_y + pos[i].y_offset;
- pos[i].y_advance -= d;
- pos[i].y_offset -= d;
-
- pos[j].y_advance = entry_y;
- break;
- case HB_DIRECTION_INVALID:
- default:
- break;
- }
-
- /* Cross-direction adjustment */
- if (c->lookup_props & LookupFlag::RightToLeft) {
- pos[i].cursive_chain() = j - i;
- if (likely (HB_DIRECTION_IS_HORIZONTAL (c->direction)))
- pos[i].y_offset = entry_y - exit_y;
- else
- pos[i].x_offset = entry_x - exit_x;
- } else {
- pos[j].cursive_chain() = i - j;
- if (likely (HB_DIRECTION_IS_HORIZONTAL (c->direction)))
- pos[j].y_offset = exit_y - entry_y;
- else
- pos[j].x_offset = exit_x - entry_x;
- }
-
- c->buffer->idx = j;
- return TRACE_RETURN (true);
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- return TRACE_RETURN (coverage.sanitize (c, this) && entryExitRecord.sanitize (c, this));
- }
-
- protected:
- USHORT format; /* Format identifier--format = 1 */
- OffsetTo<Coverage>
- coverage; /* Offset to Coverage table--from
- * beginning of subtable */
- ArrayOf<EntryExitRecord>
- entryExitRecord; /* Array of EntryExit records--in
- * Coverage Index order */
- public:
- DEFINE_SIZE_ARRAY (6, entryExitRecord);
-};
-
-struct CursivePos
-{
- template <typename context_t>
- inline typename context_t::return_t dispatch (context_t *c) const
- {
- TRACE_DISPATCH (this);
- switch (u.format) {
- case 1: return TRACE_RETURN (c->dispatch (u.format1));
- default:return TRACE_RETURN (c->default_return_value ());
- }
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- if (!u.format.sanitize (c)) return TRACE_RETURN (false);
- switch (u.format) {
- case 1: return TRACE_RETURN (u.format1.sanitize (c));
- default:return TRACE_RETURN (true);
- }
- }
-
- protected:
- union {
- USHORT format; /* Format identifier */
- CursivePosFormat1 format1;
- } u;
-};
-
-
-typedef AnchorMatrix BaseArray; /* base-major--
- * in order of BaseCoverage Index--,
- * mark-minor--
- * ordered by class--zero-based. */
-
-struct MarkBasePosFormat1
-{
- inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
- {
- TRACE_COLLECT_GLYPHS (this);
- (this+markCoverage).add_coverage (c->input);
- (this+baseCoverage).add_coverage (c->input);
- /* TODO only add combinations that have nonzero adjustment. */
- }
-
- inline const Coverage &get_coverage (void) const
- {
- return this+markCoverage;
- }
-
- inline bool apply (hb_apply_context_t *c) const
- {
- TRACE_APPLY (this);
- unsigned int mark_index = (this+markCoverage).get_coverage (c->buffer->cur().codepoint);
- if (likely (mark_index == NOT_COVERED)) return TRACE_RETURN (false);
-
- /* now we search backwards for a non-mark glyph */
- hb_apply_context_t::skipping_backward_iterator_t skippy_iter (c, c->buffer->idx, 1);
- skippy_iter.set_lookup_props (LookupFlag::IgnoreMarks);
- do {
- if (!skippy_iter.prev ()) return TRACE_RETURN (false);
- /* We only want to attach to the first of a MultipleSubst sequence. Reject others. */
- if (0 == get_lig_comp (c->buffer->info[skippy_iter.idx])) break;
- skippy_iter.reject ();
- } while (1);
-
- /* The following assertion is too strong, so we've disabled it. */
- if (!(c->buffer->info[skippy_iter.idx].glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH)) {/*return TRACE_RETURN (false);*/}
-
- unsigned int base_index = (this+baseCoverage).get_coverage (c->buffer->info[skippy_iter.idx].codepoint);
- if (base_index == NOT_COVERED) return TRACE_RETURN (false);
-
- return TRACE_RETURN ((this+markArray).apply (c, mark_index, base_index, this+baseArray, classCount, skippy_iter.idx));
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- return TRACE_RETURN (c->check_struct (this) && markCoverage.sanitize (c, this) && baseCoverage.sanitize (c, this) &&
- markArray.sanitize (c, this) && baseArray.sanitize (c, this, (unsigned int) classCount));
- }
-
- protected:
- USHORT format; /* Format identifier--format = 1 */
- OffsetTo<Coverage>
- markCoverage; /* Offset to MarkCoverage table--from
- * beginning of MarkBasePos subtable */
- OffsetTo<Coverage>
- baseCoverage; /* Offset to BaseCoverage table--from
- * beginning of MarkBasePos subtable */
- USHORT classCount; /* Number of classes defined for marks */
- OffsetTo<MarkArray>
- markArray; /* Offset to MarkArray table--from
- * beginning of MarkBasePos subtable */
- OffsetTo<BaseArray>
- baseArray; /* Offset to BaseArray table--from
- * beginning of MarkBasePos subtable */
- public:
- DEFINE_SIZE_STATIC (12);
-};
-
-struct MarkBasePos
-{
- template <typename context_t>
- inline typename context_t::return_t dispatch (context_t *c) const
- {
- TRACE_DISPATCH (this);
- switch (u.format) {
- case 1: return TRACE_RETURN (c->dispatch (u.format1));
- default:return TRACE_RETURN (c->default_return_value ());
- }
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- if (!u.format.sanitize (c)) return TRACE_RETURN (false);
- switch (u.format) {
- case 1: return TRACE_RETURN (u.format1.sanitize (c));
- default:return TRACE_RETURN (true);
- }
- }
-
- protected:
- union {
- USHORT format; /* Format identifier */
- MarkBasePosFormat1 format1;
- } u;
-};
-
-
-typedef AnchorMatrix LigatureAttach; /* component-major--
- * in order of writing direction--,
- * mark-minor--
- * ordered by class--zero-based. */
-
-typedef OffsetListOf<LigatureAttach> LigatureArray;
- /* Array of LigatureAttach
- * tables ordered by
- * LigatureCoverage Index */
-
-struct MarkLigPosFormat1
-{
- inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
- {
- TRACE_COLLECT_GLYPHS (this);
- (this+markCoverage).add_coverage (c->input);
- (this+ligatureCoverage).add_coverage (c->input);
- /* TODO only add combinations that have nonzero adjustment. */
- }
-
- inline const Coverage &get_coverage (void) const
- {
- return this+markCoverage;
- }
-
- inline bool apply (hb_apply_context_t *c) const
- {
- TRACE_APPLY (this);
- unsigned int mark_index = (this+markCoverage).get_coverage (c->buffer->cur().codepoint);
- if (likely (mark_index == NOT_COVERED)) return TRACE_RETURN (false);
-
- /* now we search backwards for a non-mark glyph */
- hb_apply_context_t::skipping_backward_iterator_t skippy_iter (c, c->buffer->idx, 1);
- skippy_iter.set_lookup_props (LookupFlag::IgnoreMarks);
- if (!skippy_iter.prev ()) return TRACE_RETURN (false);
-
- /* The following assertion is too strong, so we've disabled it. */
- if (!(c->buffer->info[skippy_iter.idx].glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE)) {/*return TRACE_RETURN (false);*/}
-
- unsigned int j = skippy_iter.idx;
- unsigned int lig_index = (this+ligatureCoverage).get_coverage (c->buffer->info[j].codepoint);
- if (lig_index == NOT_COVERED) return TRACE_RETURN (false);
-
- const LigatureArray& lig_array = this+ligatureArray;
- const LigatureAttach& lig_attach = lig_array[lig_index];
-
- /* Find component to attach to */
- unsigned int comp_count = lig_attach.rows;
- if (unlikely (!comp_count)) return TRACE_RETURN (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 = get_lig_id (c->buffer->info[j]);
- unsigned int mark_id = get_lig_id (c->buffer->cur());
- unsigned int mark_comp = get_lig_comp (c->buffer->cur());
- if (lig_id && lig_id == mark_id && mark_comp > 0)
- comp_index = MIN (comp_count, get_lig_comp (c->buffer->cur())) - 1;
- else
- comp_index = comp_count - 1;
-
- return TRACE_RETURN ((this+markArray).apply (c, mark_index, comp_index, lig_attach, classCount, j));
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- return TRACE_RETURN (c->check_struct (this) && markCoverage.sanitize (c, this) && ligatureCoverage.sanitize (c, this) &&
- markArray.sanitize (c, this) && ligatureArray.sanitize (c, this, (unsigned int) classCount));
- }
-
- protected:
- USHORT format; /* Format identifier--format = 1 */
- OffsetTo<Coverage>
- markCoverage; /* Offset to Mark Coverage table--from
- * beginning of MarkLigPos subtable */
- OffsetTo<Coverage>
- ligatureCoverage; /* Offset to Ligature Coverage
- * table--from beginning of MarkLigPos
- * subtable */
- USHORT classCount; /* Number of defined mark classes */
- OffsetTo<MarkArray>
- markArray; /* Offset to MarkArray table--from
- * beginning of MarkLigPos subtable */
- OffsetTo<LigatureArray>
- ligatureArray; /* Offset to LigatureArray table--from
- * beginning of MarkLigPos subtable */
- public:
- DEFINE_SIZE_STATIC (12);
-};
-
-struct MarkLigPos
-{
- template <typename context_t>
- inline typename context_t::return_t dispatch (context_t *c) const
- {
- TRACE_DISPATCH (this);
- switch (u.format) {
- case 1: return TRACE_RETURN (c->dispatch (u.format1));
- default:return TRACE_RETURN (c->default_return_value ());
- }
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- if (!u.format.sanitize (c)) return TRACE_RETURN (false);
- switch (u.format) {
- case 1: return TRACE_RETURN (u.format1.sanitize (c));
- default:return TRACE_RETURN (true);
- }
- }
-
- protected:
- union {
- USHORT format; /* Format identifier */
- MarkLigPosFormat1 format1;
- } u;
-};
-
-
-typedef AnchorMatrix Mark2Array; /* mark2-major--
- * in order of Mark2Coverage Index--,
- * mark1-minor--
- * ordered by class--zero-based. */
-
-struct MarkMarkPosFormat1
-{
- inline void collect_glyphs (hb_collect_glyphs_context_t *c) const
- {
- TRACE_COLLECT_GLYPHS (this);
- (this+mark1Coverage).add_coverage (c->input);
- (this+mark2Coverage).add_coverage (c->input);
- /* TODO only add combinations that have nonzero adjustment. */
- }
-
- inline const Coverage &get_coverage (void) const
- {
- return this+mark1Coverage;
- }
-
- inline bool apply (hb_apply_context_t *c) const
- {
- TRACE_APPLY (this);
- unsigned int mark1_index = (this+mark1Coverage).get_coverage (c->buffer->cur().codepoint);
- if (likely (mark1_index == NOT_COVERED)) return TRACE_RETURN (false);
-
- /* now we search backwards for a suitable mark glyph until a non-mark glyph */
- hb_apply_context_t::skipping_backward_iterator_t skippy_iter (c, c->buffer->idx, 1);
- skippy_iter.set_lookup_props (c->lookup_props & ~LookupFlag::IgnoreFlags);
- if (!skippy_iter.prev ()) return TRACE_RETURN (false);
-
- if (!(c->buffer->info[skippy_iter.idx].glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MARK)) { return TRACE_RETURN (false); }
-
- unsigned int j = skippy_iter.idx;
-
- unsigned int id1 = get_lig_id (c->buffer->cur());
- unsigned int id2 = get_lig_id (c->buffer->info[j]);
- unsigned int comp1 = get_lig_comp (c->buffer->cur());
- unsigned int comp2 = get_lig_comp (c->buffer->info[j]);
-
- if (likely (id1 == id2)) {
- if (id1 == 0) /* Marks belonging to the same base. */
- goto good;
- else if (comp1 == comp2) /* Marks belonging to the same ligature component. */
- goto good;
- } else {
- /* If ligature ids don't match, it may be the case that one of the marks
- * itself is a ligature. In which case match. */
- if ((id1 > 0 && !comp1) || (id2 > 0 && !comp2))
- goto good;
- }
-
- /* Didn't match. */
- return TRACE_RETURN (false);
-
- good:
- unsigned int mark2_index = (this+mark2Coverage).get_coverage (c->buffer->info[j].codepoint);
- if (mark2_index == NOT_COVERED) return TRACE_RETURN (false);
-
- return TRACE_RETURN ((this+mark1Array).apply (c, mark1_index, mark2_index, this+mark2Array, classCount, j));
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- return TRACE_RETURN (c->check_struct (this) && mark1Coverage.sanitize (c, this) &&
- mark2Coverage.sanitize (c, this) && mark1Array.sanitize (c, this)
- && mark2Array.sanitize (c, this, (unsigned int) classCount));
- }
-
- protected:
- USHORT format; /* Format identifier--format = 1 */
- OffsetTo<Coverage>
- mark1Coverage; /* Offset to Combining Mark1 Coverage
- * table--from beginning of MarkMarkPos
- * subtable */
- OffsetTo<Coverage>
- mark2Coverage; /* Offset to Combining Mark2 Coverage
- * table--from beginning of MarkMarkPos
- * subtable */
- USHORT classCount; /* Number of defined mark classes */
- OffsetTo<MarkArray>
- mark1Array; /* Offset to Mark1Array table--from
- * beginning of MarkMarkPos subtable */
- OffsetTo<Mark2Array>
- mark2Array; /* Offset to Mark2Array table--from
- * beginning of MarkMarkPos subtable */
- public:
- DEFINE_SIZE_STATIC (12);
-};
-
-struct MarkMarkPos
-{
- template <typename context_t>
- inline typename context_t::return_t dispatch (context_t *c) const
- {
- TRACE_DISPATCH (this);
- switch (u.format) {
- case 1: return TRACE_RETURN (c->dispatch (u.format1));
- default:return TRACE_RETURN (c->default_return_value ());
- }
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- if (!u.format.sanitize (c)) return TRACE_RETURN (false);
- switch (u.format) {
- case 1: return TRACE_RETURN (u.format1.sanitize (c));
- default:return TRACE_RETURN (true);
- }
- }
-
- protected:
- union {
- USHORT format; /* Format identifier */
- MarkMarkPosFormat1 format1;
- } u;
-};
-
-
-struct ContextPos : Context {};
-
-struct ChainContextPos : ChainContext {};
-
-struct ExtensionPos : Extension<ExtensionPos>
-{
- typedef struct PosLookupSubTable LookupSubTable;
-};
-
-
-
-/*
- * PosLookup
- */
-
-
-struct PosLookupSubTable
-{
- friend struct PosLookup;
-
- enum Type {
- Single = 1,
- Pair = 2,
- Cursive = 3,
- MarkBase = 4,
- MarkLig = 5,
- MarkMark = 6,
- Context = 7,
- ChainContext = 8,
- Extension = 9
- };
-
- template <typename context_t>
- inline typename context_t::return_t dispatch (context_t *c, unsigned int lookup_type) const
- {
- TRACE_DISPATCH (this);
- switch (lookup_type) {
- case Single: return TRACE_RETURN (u.single.dispatch (c));
- case Pair: return TRACE_RETURN (u.pair.dispatch (c));
- case Cursive: return TRACE_RETURN (u.cursive.dispatch (c));
- case MarkBase: return TRACE_RETURN (u.markBase.dispatch (c));
- case MarkLig: return TRACE_RETURN (u.markLig.dispatch (c));
- case MarkMark: return TRACE_RETURN (u.markMark.dispatch (c));
- case Context: return TRACE_RETURN (u.context.dispatch (c));
- case ChainContext: return TRACE_RETURN (u.chainContext.dispatch (c));
- case Extension: return TRACE_RETURN (u.extension.dispatch (c));
- default: return TRACE_RETURN (c->default_return_value ());
- }
- }
-
- inline bool sanitize (hb_sanitize_context_t *c, unsigned int lookup_type) {
- TRACE_SANITIZE (this);
- if (!u.header.sub_format.sanitize (c))
- return TRACE_RETURN (false);
- switch (lookup_type) {
- case Single: return TRACE_RETURN (u.single.sanitize (c));
- case Pair: return TRACE_RETURN (u.pair.sanitize (c));
- case Cursive: return TRACE_RETURN (u.cursive.sanitize (c));
- case MarkBase: return TRACE_RETURN (u.markBase.sanitize (c));
- case MarkLig: return TRACE_RETURN (u.markLig.sanitize (c));
- case MarkMark: return TRACE_RETURN (u.markMark.sanitize (c));
- case Context: return TRACE_RETURN (u.context.sanitize (c));
- case ChainContext: return TRACE_RETURN (u.chainContext.sanitize (c));
- case Extension: return TRACE_RETURN (u.extension.sanitize (c));
- default: return TRACE_RETURN (true);
- }
- }
-
- protected:
- union {
- struct {
- USHORT sub_format;
- } header;
- SinglePos single;
- PairPos pair;
- CursivePos cursive;
- MarkBasePos markBase;
- MarkLigPos markLig;
- MarkMarkPos markMark;
- ContextPos context;
- ChainContextPos chainContext;
- ExtensionPos extension;
- } u;
- public:
- DEFINE_SIZE_UNION (2, header.sub_format);
-};
-
-
-struct PosLookup : Lookup
-{
- inline const PosLookupSubTable& get_subtable (unsigned int i) const
- { return this+CastR<OffsetArrayOf<PosLookupSubTable> > (subTable)[i]; }
-
- inline hb_collect_glyphs_context_t::return_t collect_glyphs_lookup (hb_collect_glyphs_context_t *c) const
- {
- TRACE_COLLECT_GLYPHS (this);
- c->set_recurse_func (NULL);
- return TRACE_RETURN (dispatch (c));
- }
-
- template <typename set_t>
- inline void add_coverage (set_t *glyphs) const
- {
- hb_get_coverage_context_t c;
- const Coverage *last = NULL;
- unsigned int count = get_subtable_count ();
- for (unsigned int i = 0; i < count; i++) {
- const Coverage *coverage = &get_subtable (i).dispatch (&c, get_type ());
- if (coverage != last) {
- coverage->add_coverage (glyphs);
- last = coverage;
- }
- }
- }
-
- inline bool apply_once (hb_apply_context_t *c) const
- {
- TRACE_APPLY (this);
- if (!c->check_glyph_property (&c->buffer->cur(), c->lookup_props))
- return TRACE_RETURN (false);
- return TRACE_RETURN (dispatch (c));
- }
-
- static bool apply_recurse_func (hb_apply_context_t *c, unsigned int lookup_index);
-
- inline bool apply_string (hb_apply_context_t *c, const hb_set_digest_t *digest) const
- {
- bool ret = false;
-
- if (unlikely (!c->buffer->len || !c->lookup_mask))
- return false;
-
- c->set_recurse_func (apply_recurse_func);
- c->set_lookup (*this);
-
- c->buffer->idx = 0;
-
- while (c->buffer->idx < c->buffer->len)
- {
- if ((c->buffer->cur().mask & c->lookup_mask) &&
- digest->may_have (c->buffer->cur().codepoint) &&
- apply_once (c))
- ret = true;
- else
- c->buffer->idx++;
- }
-
- return ret;
- }
-
- template <typename context_t>
- static inline typename context_t::return_t dispatch_recurse_func (context_t *c, unsigned int lookup_index);
-
- template <typename context_t>
- inline typename context_t::return_t dispatch (context_t *c) const
- {
- TRACE_DISPATCH (this);
- unsigned int lookup_type = get_type ();
- unsigned int count = get_subtable_count ();
- for (unsigned int i = 0; i < count; i++) {
- typename context_t::return_t r = get_subtable (i).dispatch (c, lookup_type);
- if (c->stop_sublookup_iteration (r))
- return TRACE_RETURN (r);
- }
- return TRACE_RETURN (c->default_return_value ());
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- if (unlikely (!Lookup::sanitize (c))) return TRACE_RETURN (false);
- OffsetArrayOf<PosLookupSubTable> &list = CastR<OffsetArrayOf<PosLookupSubTable> > (subTable);
- return TRACE_RETURN (list.sanitize (c, this, get_type ()));
- }
-};
-
-typedef OffsetListOf<PosLookup> PosLookupList;
-
-/*
- * GPOS -- The Glyph Positioning Table
- */
-
-struct GPOS : GSUBGPOS
-{
- static const hb_tag_t Tag = HB_OT_TAG_GPOS;
-
- inline const PosLookup& get_lookup (unsigned int i) const
- { return CastR<PosLookup> (GSUBGPOS::get_lookup (i)); }
-
- static inline void position_start (hb_font_t *font, hb_buffer_t *buffer);
- static inline void position_finish (hb_font_t *font, hb_buffer_t *buffer);
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- if (unlikely (!GSUBGPOS::sanitize (c))) return TRACE_RETURN (false);
- OffsetTo<PosLookupList> &list = CastR<OffsetTo<PosLookupList> > (lookupList);
- return TRACE_RETURN (list.sanitize (c, this));
- }
- public:
- DEFINE_SIZE_STATIC (10);
-};
-
-
-static void
-fix_cursive_minor_offset (hb_glyph_position_t *pos, unsigned int i, hb_direction_t direction)
-{
- unsigned int j = pos[i].cursive_chain();
- if (likely (!j))
- return;
-
- j += i;
-
- pos[i].cursive_chain() = 0;
-
- fix_cursive_minor_offset (pos, j, direction);
-
- if (HB_DIRECTION_IS_HORIZONTAL (direction))
- pos[i].y_offset += pos[j].y_offset;
- else
- pos[i].x_offset += pos[j].x_offset;
-}
-
-static void
-fix_mark_attachment (hb_glyph_position_t *pos, unsigned int i, hb_direction_t direction)
-{
- if (likely (!(pos[i].attach_lookback())))
- return;
-
- unsigned int j = i - pos[i].attach_lookback();
-
- pos[i].x_offset += pos[j].x_offset;
- pos[i].y_offset += pos[j].y_offset;
-
- 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)
-{
- buffer->clear_positions ();
-
- unsigned int count = buffer->len;
- for (unsigned int i = 0; i < count; i++)
- buffer->pos[i].attach_lookback() = buffer->pos[i].cursive_chain() = 0;
-}
-
-void
-GPOS::position_finish (hb_font_t *font HB_UNUSED, hb_buffer_t *buffer)
-{
- unsigned int len;
- hb_glyph_position_t *pos = hb_buffer_get_glyph_positions (buffer, &len);
- hb_direction_t direction = buffer->props.direction;
-
- /* Handle cursive connections */
- for (unsigned int i = 0; i < len; i++)
- fix_cursive_minor_offset (pos, i, direction);
-
- /* Handle attachments */
- for (unsigned int i = 0; i < len; i++)
- fix_mark_attachment (pos, i, direction);
-
- HB_BUFFER_DEALLOCATE_VAR (buffer, syllable);
- HB_BUFFER_DEALLOCATE_VAR (buffer, lig_props);
- HB_BUFFER_DEALLOCATE_VAR (buffer, glyph_props);
-}
-
-
-/* Out-of-class implementation for methods recursing */
-
-template <typename context_t>
-inline typename context_t::return_t PosLookup::dispatch_recurse_func (context_t *c, unsigned int lookup_index)
-{
- const GPOS &gpos = *(hb_ot_layout_from_face (c->face)->gpos);
- const PosLookup &l = gpos.get_lookup (lookup_index);
- return l.dispatch (c);
-}
-
-inline bool PosLookup::apply_recurse_func (hb_apply_context_t *c, unsigned int lookup_index)
-{
- const GPOS &gpos = *(hb_ot_layout_from_face (c->face)->gpos);
- const PosLookup &l = gpos.get_lookup (lookup_index);
- unsigned int saved_lookup_props = c->lookup_props;
- c->set_lookup (l);
- bool ret = l.apply_once (c);
- c->lookup_props = saved_lookup_props;
- return ret;
-}
-
-
-#undef attach_lookback
-#undef cursive_chain
-
-
-} /* namespace OT */
-
-
-#endif /* HB_OT_LAYOUT_GPOS_TABLE_HH */