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diff --git a/Build/source/libs/harfbuzz/harfbuzz-0.9.7/src/hb-ot-layout-common-private.hh b/Build/source/libs/harfbuzz/harfbuzz-0.9.7/src/hb-ot-layout-common-private.hh
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+/*
+ * Copyright © 2007,2008,2009 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_COMMON_PRIVATE_HH
+#define HB_OT_LAYOUT_COMMON_PRIVATE_HH
+
+#include "hb-ot-layout-private.hh"
+#include "hb-open-type-private.hh"
+#include "hb-set-private.hh"
+
+
+namespace OT {
+
+
+#define NOT_COVERED ((unsigned int) -1)
+#define MAX_NESTING_LEVEL 8
+
+
+
+/*
+ *
+ * OpenType Layout Common Table Formats
+ *
+ */
+
+
+/*
+ * Script, ScriptList, LangSys, Feature, FeatureList, Lookup, LookupList
+ */
+
+template <typename Type>
+struct Record
+{
+ inline int cmp (hb_tag_t a) const {
+ return tag.cmp (a);
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c, void *base) {
+ TRACE_SANITIZE (this);
+ return TRACE_RETURN (c->check_struct (this) && offset.sanitize (c, base));
+ }
+
+ Tag tag; /* 4-byte Tag identifier */
+ OffsetTo<Type>
+ offset; /* Offset from beginning of object holding
+ * the Record */
+ public:
+ DEFINE_SIZE_STATIC (6);
+};
+
+template <typename Type>
+struct RecordArrayOf : SortedArrayOf<Record<Type> > {
+ inline const Tag& get_tag (unsigned int i) const
+ {
+ /* We cheat slightly and don't define separate Null objects
+ * for Record types. Instead, we return the correct Null(Tag)
+ * here. */
+ if (unlikely (i >= this->len)) return Null(Tag);
+ return (*this)[i].tag;
+ }
+ inline unsigned int get_tags (unsigned int start_offset,
+ unsigned int *record_count /* IN/OUT */,
+ hb_tag_t *record_tags /* OUT */) const
+ {
+ if (record_count) {
+ const Record<Type> *arr = this->sub_array (start_offset, record_count);
+ unsigned int count = *record_count;
+ for (unsigned int i = 0; i < count; i++)
+ record_tags[i] = arr[i].tag;
+ }
+ return this->len;
+ }
+ inline bool find_index (hb_tag_t tag, unsigned int *index) const
+ {
+ int i = this->search (tag);
+ if (i != -1) {
+ if (index) *index = i;
+ return true;
+ } else {
+ if (index) *index = Index::NOT_FOUND_INDEX;
+ return false;
+ }
+ }
+};
+
+template <typename Type>
+struct RecordListOf : RecordArrayOf<Type>
+{
+ inline const Type& operator [] (unsigned int i) const
+ { return this+RecordArrayOf<Type>::operator [](i).offset; }
+
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE (this);
+ return TRACE_RETURN (RecordArrayOf<Type>::sanitize (c, this));
+ }
+};
+
+
+struct RangeRecord
+{
+ inline int cmp (hb_codepoint_t g) const {
+ hb_codepoint_t a = start, b = end;
+ return g < a ? -1 : g <= b ? 0 : +1 ;
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE (this);
+ return TRACE_RETURN (c->check_struct (this));
+ }
+
+ inline bool intersects (const hb_set_t *glyphs) const {
+ return glyphs->intersects (start, end);
+ }
+
+ template <typename set_t>
+ inline void add_coverage (set_t *glyphs) const {
+ glyphs->add_range (start, end);
+ }
+
+ GlyphID start; /* First GlyphID in the range */
+ GlyphID end; /* Last GlyphID in the range */
+ USHORT value; /* Value */
+ public:
+ DEFINE_SIZE_STATIC (6);
+};
+DEFINE_NULL_DATA (RangeRecord, "\000\001");
+
+
+struct IndexArray : ArrayOf<Index>
+{
+ inline unsigned int get_indexes (unsigned int start_offset,
+ unsigned int *_count /* IN/OUT */,
+ unsigned int *_indexes /* OUT */) const
+ {
+ if (_count) {
+ const USHORT *arr = this->sub_array (start_offset, _count);
+ unsigned int count = *_count;
+ for (unsigned int i = 0; i < count; i++)
+ _indexes[i] = arr[i];
+ }
+ return this->len;
+ }
+};
+
+
+struct Script;
+struct LangSys;
+struct Feature;
+
+
+struct LangSys
+{
+ inline unsigned int get_feature_count (void) const
+ { return featureIndex.len; }
+ inline hb_tag_t get_feature_index (unsigned int i) const
+ { return featureIndex[i]; }
+ inline unsigned int get_feature_indexes (unsigned int start_offset,
+ unsigned int *feature_count /* IN/OUT */,
+ unsigned int *feature_indexes /* OUT */) const
+ { return featureIndex.get_indexes (start_offset, feature_count, feature_indexes); }
+
+ inline bool has_required_feature (void) const { return reqFeatureIndex != 0xffff; }
+ inline unsigned int get_required_feature_index (void) const
+ {
+ if (reqFeatureIndex == 0xffff)
+ return Index::NOT_FOUND_INDEX;
+ return reqFeatureIndex;;
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE (this);
+ return TRACE_RETURN (c->check_struct (this) && featureIndex.sanitize (c));
+ }
+
+ Offset lookupOrder; /* = Null (reserved for an offset to a
+ * reordering table) */
+ USHORT reqFeatureIndex;/* Index of a feature required for this
+ * language system--if no required features
+ * = 0xFFFF */
+ IndexArray featureIndex; /* Array of indices into the FeatureList */
+ public:
+ DEFINE_SIZE_ARRAY (6, featureIndex);
+};
+DEFINE_NULL_DATA (LangSys, "\0\0\xFF\xFF");
+
+
+struct Script
+{
+ inline unsigned int get_lang_sys_count (void) const
+ { return langSys.len; }
+ inline const Tag& get_lang_sys_tag (unsigned int i) const
+ { return langSys.get_tag (i); }
+ inline unsigned int get_lang_sys_tags (unsigned int start_offset,
+ unsigned int *lang_sys_count /* IN/OUT */,
+ hb_tag_t *lang_sys_tags /* OUT */) const
+ { return langSys.get_tags (start_offset, lang_sys_count, lang_sys_tags); }
+ inline const LangSys& get_lang_sys (unsigned int i) const
+ {
+ if (i == Index::NOT_FOUND_INDEX) return get_default_lang_sys ();
+ return this+langSys[i].offset;
+ }
+ inline bool find_lang_sys_index (hb_tag_t tag, unsigned int *index) const
+ { return langSys.find_index (tag, index); }
+
+ inline bool has_default_lang_sys (void) const { return defaultLangSys != 0; }
+ inline const LangSys& get_default_lang_sys (void) const { return this+defaultLangSys; }
+
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE (this);
+ return TRACE_RETURN (defaultLangSys.sanitize (c, this) && langSys.sanitize (c, this));
+ }
+
+ protected:
+ OffsetTo<LangSys>
+ defaultLangSys; /* Offset to DefaultLangSys table--from
+ * beginning of Script table--may be Null */
+ RecordArrayOf<LangSys>
+ langSys; /* Array of LangSysRecords--listed
+ * alphabetically by LangSysTag */
+ public:
+ DEFINE_SIZE_ARRAY (4, langSys);
+};
+
+typedef RecordListOf<Script> ScriptList;
+
+struct FeatureParamsSize
+{
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE (this);
+ return TRACE_RETURN (c->check_struct (this));
+ }
+
+ USHORT params[5];
+ public:
+ DEFINE_SIZE_STATIC (10);
+};
+
+struct FeatureParams
+{
+ /* Note: currently the only feature with params is 'size', so we hardcode
+ * the length of the table to that of the FeatureParamsSize. */
+
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE (this);
+ return TRACE_RETURN (c->check_struct (this));
+ }
+
+ union {
+ FeatureParamsSize size;
+ } u;
+ DEFINE_SIZE_STATIC (10);
+};
+
+struct Feature
+{
+ inline unsigned int get_lookup_count (void) const
+ { return lookupIndex.len; }
+ inline hb_tag_t get_lookup_index (unsigned int i) const
+ { return lookupIndex[i]; }
+ inline unsigned int get_lookup_indexes (unsigned int start_index,
+ unsigned int *lookup_count /* IN/OUT */,
+ unsigned int *lookup_tags /* OUT */) const
+ { return lookupIndex.get_indexes (start_index, lookup_count, lookup_tags); }
+
+ inline const FeatureParams &get_feature_params (void) const
+ { return this+featureParams; }
+
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE (this);
+ return TRACE_RETURN (c->check_struct (this) && lookupIndex.sanitize (c) &&
+ featureParams.sanitize (c, this));
+ }
+
+ OffsetTo<FeatureParams>
+ featureParams; /* Offset to Feature Parameters table (if one
+ * has been defined for the feature), relative
+ * to the beginning of the Feature Table; = Null
+ * if not required */
+ IndexArray lookupIndex; /* Array of LookupList indices */
+ public:
+ DEFINE_SIZE_ARRAY (4, lookupIndex);
+};
+
+typedef RecordListOf<Feature> FeatureList;
+
+
+struct LookupFlag : USHORT
+{
+ enum Flags {
+ RightToLeft = 0x0001u,
+ IgnoreBaseGlyphs = 0x0002u,
+ IgnoreLigatures = 0x0004u,
+ IgnoreMarks = 0x0008u,
+ IgnoreFlags = 0x000Eu,
+ UseMarkFilteringSet = 0x0010u,
+ Reserved = 0x00E0u,
+ MarkAttachmentType = 0xFF00u
+ };
+ public:
+ DEFINE_SIZE_STATIC (2);
+};
+
+struct Lookup
+{
+ inline unsigned int get_subtable_count (void) const { return subTable.len; }
+
+ inline unsigned int get_type (void) const { return lookupType; }
+
+ /* lookup_props is a 32-bit integer where the lower 16-bit is LookupFlag and
+ * higher 16-bit is mark-filtering-set if the lookup uses one.
+ * Not to be confused with glyph_props which is very similar. */
+ inline uint32_t get_props (void) const
+ {
+ unsigned int flag = lookupFlag;
+ if (unlikely (flag & LookupFlag::UseMarkFilteringSet))
+ {
+ const USHORT &markFilteringSet = StructAfter<USHORT> (subTable);
+ flag += (markFilteringSet << 16);
+ }
+ return flag;
+ }
+
+ inline bool serialize (hb_serialize_context_t *c,
+ unsigned int lookup_type,
+ uint32_t lookup_props,
+ unsigned int num_subtables)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!c->extend_min (*this))) return TRACE_RETURN (false);
+ lookupType.set (lookup_type);
+ lookupFlag.set (lookup_props & 0xFFFF);
+ if (unlikely (!subTable.serialize (c, num_subtables))) return TRACE_RETURN (false);
+ if (lookupFlag & LookupFlag::UseMarkFilteringSet)
+ {
+ USHORT &markFilteringSet = StructAfter<USHORT> (subTable);
+ markFilteringSet.set (lookup_props >> 16);
+ }
+ return TRACE_RETURN (true);
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE (this);
+ /* Real sanitize of the subtables is done by GSUB/GPOS/... */
+ if (!(c->check_struct (this) && subTable.sanitize (c))) return TRACE_RETURN (false);
+ if (lookupFlag & LookupFlag::UseMarkFilteringSet)
+ {
+ USHORT &markFilteringSet = StructAfter<USHORT> (subTable);
+ if (!markFilteringSet.sanitize (c)) return TRACE_RETURN (false);
+ }
+ return TRACE_RETURN (true);
+ }
+
+ USHORT lookupType; /* Different enumerations for GSUB and GPOS */
+ USHORT lookupFlag; /* Lookup qualifiers */
+ ArrayOf<Offset>
+ subTable; /* Array of SubTables */
+ USHORT markFilteringSetX[VAR]; /* Index (base 0) into GDEF mark glyph sets
+ * structure. This field is only present if bit
+ * UseMarkFilteringSet of lookup flags is set. */
+ public:
+ DEFINE_SIZE_ARRAY2 (6, subTable, markFilteringSetX);
+};
+
+typedef OffsetListOf<Lookup> LookupList;
+
+
+/*
+ * Coverage Table
+ */
+
+struct CoverageFormat1
+{
+ friend struct Coverage;
+
+ private:
+ inline unsigned int get_coverage (hb_codepoint_t glyph_id) const
+ {
+ int i = glyphArray.search (glyph_id);
+ ASSERT_STATIC (((unsigned int) -1) == NOT_COVERED);
+ return i;
+ }
+
+ inline bool serialize (hb_serialize_context_t *c,
+ Supplier<GlyphID> &glyphs,
+ unsigned int num_glyphs)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!c->extend_min (*this))) return TRACE_RETURN (false);
+ glyphArray.len.set (num_glyphs);
+ if (unlikely (!c->extend (glyphArray))) return TRACE_RETURN (false);
+ for (unsigned int i = 0; i < num_glyphs; i++)
+ glyphArray[i] = glyphs[i];
+ glyphs.advance (num_glyphs);
+ return TRACE_RETURN (true);
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE (this);
+ return TRACE_RETURN (glyphArray.sanitize (c));
+ }
+
+ inline bool intersects_coverage (const hb_set_t *glyphs, unsigned int index) const {
+ return glyphs->has (glyphArray[index]);
+ }
+
+ template <typename set_t>
+ inline void add_coverage (set_t *glyphs) const {
+ unsigned int count = glyphArray.len;
+ for (unsigned int i = 0; i < count; i++)
+ glyphs->add (glyphArray[i]);
+ }
+
+ public:
+ /* Older compilers need this to be public. */
+ struct Iter {
+ inline void init (const struct CoverageFormat1 &c_) { c = &c_; i = 0; };
+ inline bool more (void) { return i < c->glyphArray.len; }
+ inline void next (void) { i++; }
+ inline uint16_t get_glyph (void) { return c->glyphArray[i]; }
+ inline uint16_t get_coverage (void) { return i; }
+
+ private:
+ const struct CoverageFormat1 *c;
+ unsigned int i;
+ };
+ private:
+
+ protected:
+ USHORT coverageFormat; /* Format identifier--format = 1 */
+ SortedArrayOf<GlyphID>
+ glyphArray; /* Array of GlyphIDs--in numerical order */
+ public:
+ DEFINE_SIZE_ARRAY (4, glyphArray);
+};
+
+struct CoverageFormat2
+{
+ friend struct Coverage;
+
+ private:
+ inline unsigned int get_coverage (hb_codepoint_t glyph_id) const
+ {
+ int i = rangeRecord.search (glyph_id);
+ if (i != -1) {
+ const RangeRecord &range = rangeRecord[i];
+ return (unsigned int) range.value + (glyph_id - range.start);
+ }
+ return NOT_COVERED;
+ }
+
+ inline bool serialize (hb_serialize_context_t *c,
+ Supplier<GlyphID> &glyphs,
+ unsigned int num_glyphs)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!c->extend_min (*this))) return TRACE_RETURN (false);
+
+ if (unlikely (!num_glyphs)) return TRACE_RETURN (true);
+
+ unsigned int num_ranges = 1;
+ for (unsigned int i = 1; i < num_glyphs; i++)
+ if (glyphs[i - 1] + 1 != glyphs[i])
+ num_ranges++;
+ rangeRecord.len.set (num_ranges);
+ if (unlikely (!c->extend (rangeRecord))) return TRACE_RETURN (false);
+
+ unsigned int range = 0;
+ rangeRecord[range].start = glyphs[0];
+ rangeRecord[range].value.set (0);
+ for (unsigned int i = 1; i < num_glyphs; i++)
+ if (glyphs[i - 1] + 1 != glyphs[i]) {
+ range++;
+ rangeRecord[range].start = glyphs[i];
+ rangeRecord[range].value.set (i);
+ rangeRecord[range].end = glyphs[i];
+ } else {
+ rangeRecord[range].end = glyphs[i];
+ }
+ glyphs.advance (num_glyphs);
+ return TRACE_RETURN (true);
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE (this);
+ return TRACE_RETURN (rangeRecord.sanitize (c));
+ }
+
+ inline bool intersects_coverage (const hb_set_t *glyphs, unsigned int index) const {
+ unsigned int i;
+ unsigned int count = rangeRecord.len;
+ for (i = 0; i < count; i++) {
+ const RangeRecord &range = rangeRecord[i];
+ if (range.value <= index &&
+ index < (unsigned int) range.value + (range.end - range.start) &&
+ range.intersects (glyphs))
+ return true;
+ else if (index < range.value)
+ return false;
+ }
+ return false;
+ }
+
+ template <typename set_t>
+ inline void add_coverage (set_t *glyphs) const {
+ unsigned int count = rangeRecord.len;
+ for (unsigned int i = 0; i < count; i++)
+ rangeRecord[i].add_coverage (glyphs);
+ }
+
+ public:
+ /* Older compilers need this to be public. */
+ struct Iter {
+ inline void init (const CoverageFormat2 &c_) {
+ c = &c_;
+ coverage = 0;
+ i = 0;
+ j = c->rangeRecord.len ? c_.rangeRecord[0].start : 0;
+ }
+ inline bool more (void) { return i < c->rangeRecord.len; }
+ inline void next (void) {
+ coverage++;
+ if (j == c->rangeRecord[i].end) {
+ i++;
+ if (more ())
+ j = c->rangeRecord[i].start;
+ return;
+ }
+ j++;
+ }
+ inline uint16_t get_glyph (void) { return j; }
+ inline uint16_t get_coverage (void) { return coverage; }
+
+ private:
+ const struct CoverageFormat2 *c;
+ unsigned int i, j, coverage;
+ };
+ private:
+
+ protected:
+ USHORT coverageFormat; /* Format identifier--format = 2 */
+ SortedArrayOf<RangeRecord>
+ rangeRecord; /* Array of glyph ranges--ordered by
+ * Start GlyphID. rangeCount entries
+ * long */
+ public:
+ DEFINE_SIZE_ARRAY (4, rangeRecord);
+};
+
+struct Coverage
+{
+ inline unsigned int get_coverage (hb_codepoint_t glyph_id) const
+ {
+ switch (u.format) {
+ case 1: return u.format1.get_coverage(glyph_id);
+ case 2: return u.format2.get_coverage(glyph_id);
+ default:return NOT_COVERED;
+ }
+ }
+
+ inline bool serialize (hb_serialize_context_t *c,
+ Supplier<GlyphID> &glyphs,
+ unsigned int num_glyphs)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!c->extend_min (*this))) return TRACE_RETURN (false);
+ unsigned int num_ranges = 1;
+ for (unsigned int i = 1; i < num_glyphs; i++)
+ if (glyphs[i - 1] + 1 != glyphs[i])
+ num_ranges++;
+ u.format.set (num_glyphs * 2 < num_ranges * 3 ? 1 : 2);
+ switch (u.format) {
+ case 1: return TRACE_RETURN (u.format1.serialize (c, glyphs, num_glyphs));
+ case 2: return TRACE_RETURN (u.format2.serialize (c, glyphs, num_glyphs));
+ default:return TRACE_RETURN (false);
+ }
+ }
+
+ 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);
+ }
+ }
+
+ inline bool intersects (const hb_set_t *glyphs) const {
+ /* TODO speed this up */
+ Coverage::Iter iter;
+ for (iter.init (*this); iter.more (); iter.next ()) {
+ if (glyphs->has (iter.get_glyph ()))
+ return true;
+ }
+ return false;
+ }
+
+ inline bool intersects_coverage (const hb_set_t *glyphs, unsigned int index) const {
+ switch (u.format) {
+ case 1: return u.format1.intersects_coverage (glyphs, index);
+ case 2: return u.format2.intersects_coverage (glyphs, index);
+ default:return false;
+ }
+ }
+
+ template <typename set_t>
+ inline void add_coverage (set_t *glyphs) const {
+ switch (u.format) {
+ case 1: u.format1.add_coverage (glyphs); break;
+ case 2: u.format2.add_coverage (glyphs); break;
+ default: break;
+ }
+ }
+
+ struct Iter {
+ Iter (void) : format (0) {};
+ inline void init (const Coverage &c_) {
+ format = c_.u.format;
+ switch (format) {
+ case 1: return u.format1.init (c_.u.format1);
+ case 2: return u.format2.init (c_.u.format2);
+ default:return;
+ }
+ }
+ inline bool more (void) {
+ switch (format) {
+ case 1: return u.format1.more ();
+ case 2: return u.format2.more ();
+ default:return true;
+ }
+ }
+ inline void next (void) {
+ switch (format) {
+ case 1: u.format1.next (); break;
+ case 2: u.format2.next (); break;
+ default: break;
+ }
+ }
+ inline uint16_t get_glyph (void) {
+ switch (format) {
+ case 1: return u.format1.get_glyph ();
+ case 2: return u.format2.get_glyph ();
+ default:return true;
+ }
+ }
+ inline uint16_t get_coverage (void) {
+ switch (format) {
+ case 1: return u.format1.get_coverage ();
+ case 2: return u.format2.get_coverage ();
+ default:return true;
+ }
+ }
+
+ private:
+ unsigned int format;
+ union {
+ CoverageFormat1::Iter format1;
+ CoverageFormat2::Iter format2;
+ } u;
+ };
+
+ protected:
+ union {
+ USHORT format; /* Format identifier */
+ CoverageFormat1 format1;
+ CoverageFormat2 format2;
+ } u;
+ public:
+ DEFINE_SIZE_UNION (2, format);
+};
+
+
+/*
+ * Class Definition Table
+ */
+
+struct ClassDefFormat1
+{
+ friend struct ClassDef;
+
+ private:
+ inline unsigned int get_class (hb_codepoint_t glyph_id) const
+ {
+ if (unlikely ((unsigned int) (glyph_id - startGlyph) < classValue.len))
+ return classValue[glyph_id - startGlyph];
+ return 0;
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE (this);
+ return TRACE_RETURN (c->check_struct (this) && classValue.sanitize (c));
+ }
+
+ template <typename set_t>
+ inline void add_class (set_t *glyphs, unsigned int klass) const {
+ unsigned int count = classValue.len;
+ for (unsigned int i = 0; i < count; i++)
+ if (classValue[i] == klass)
+ glyphs->add (startGlyph + i);
+ }
+
+ inline bool intersects_class (const hb_set_t *glyphs, unsigned int klass) const {
+ unsigned int count = classValue.len;
+ for (unsigned int i = 0; i < count; i++)
+ if (classValue[i] == klass && glyphs->has (startGlyph + i))
+ return true;
+ return false;
+ }
+
+ protected:
+ USHORT classFormat; /* Format identifier--format = 1 */
+ GlyphID startGlyph; /* First GlyphID of the classValueArray */
+ ArrayOf<USHORT>
+ classValue; /* Array of Class Values--one per GlyphID */
+ public:
+ DEFINE_SIZE_ARRAY (6, classValue);
+};
+
+struct ClassDefFormat2
+{
+ friend struct ClassDef;
+
+ private:
+ inline unsigned int get_class (hb_codepoint_t glyph_id) const
+ {
+ int i = rangeRecord.search (glyph_id);
+ if (i != -1)
+ return rangeRecord[i].value;
+ return 0;
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE (this);
+ return TRACE_RETURN (rangeRecord.sanitize (c));
+ }
+
+ template <typename set_t>
+ inline void add_class (set_t *glyphs, unsigned int klass) const {
+ unsigned int count = rangeRecord.len;
+ for (unsigned int i = 0; i < count; i++)
+ if (rangeRecord[i].value == klass)
+ rangeRecord[i].add_coverage (glyphs);
+ }
+
+ inline bool intersects_class (const hb_set_t *glyphs, unsigned int klass) const {
+ unsigned int count = rangeRecord.len;
+ for (unsigned int i = 0; i < count; i++)
+ if (rangeRecord[i].value == klass && rangeRecord[i].intersects (glyphs))
+ return true;
+ return false;
+ }
+
+ protected:
+ USHORT classFormat; /* Format identifier--format = 2 */
+ SortedArrayOf<RangeRecord>
+ rangeRecord; /* Array of glyph ranges--ordered by
+ * Start GlyphID */
+ public:
+ DEFINE_SIZE_ARRAY (4, rangeRecord);
+};
+
+struct ClassDef
+{
+ inline unsigned int get_class (hb_codepoint_t glyph_id) const
+ {
+ switch (u.format) {
+ case 1: return u.format1.get_class(glyph_id);
+ case 2: return u.format2.get_class(glyph_id);
+ default:return 0;
+ }
+ }
+
+ 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);
+ }
+ }
+
+ inline void add_class (hb_set_t *glyphs, unsigned int klass) const {
+ switch (u.format) {
+ case 1: u.format1.add_class (glyphs, klass); return;
+ case 2: u.format2.add_class (glyphs, klass); return;
+ default:return;
+ }
+ }
+
+ inline bool intersects_class (const hb_set_t *glyphs, unsigned int klass) const {
+ switch (u.format) {
+ case 1: return u.format1.intersects_class (glyphs, klass);
+ case 2: return u.format2.intersects_class (glyphs, klass);
+ default:return false;
+ }
+ }
+
+ protected:
+ union {
+ USHORT format; /* Format identifier */
+ ClassDefFormat1 format1;
+ ClassDefFormat2 format2;
+ } u;
+ public:
+ DEFINE_SIZE_UNION (2, format);
+};
+
+
+/*
+ * Device Tables
+ */
+
+struct Device
+{
+
+ inline hb_position_t get_x_delta (hb_font_t *font) const
+ { return get_delta (font->x_ppem, font->x_scale); }
+
+ inline hb_position_t get_y_delta (hb_font_t *font) const
+ { return get_delta (font->y_ppem, font->y_scale); }
+
+ inline int get_delta (unsigned int ppem, int scale) const
+ {
+ if (!ppem) return 0;
+
+ int pixels = get_delta_pixels (ppem);
+
+ if (!pixels) return 0;
+
+ return pixels * (int64_t) scale / ppem;
+ }
+
+
+ inline int get_delta_pixels (unsigned int ppem_size) const
+ {
+ unsigned int f = deltaFormat;
+ if (unlikely (f < 1 || f > 3))
+ return 0;
+
+ if (ppem_size < startSize || ppem_size > endSize)
+ return 0;
+
+ unsigned int s = ppem_size - startSize;
+
+ unsigned int byte = deltaValue[s >> (4 - f)];
+ unsigned int bits = (byte >> (16 - (((s & ((1 << (4 - f)) - 1)) + 1) << f)));
+ unsigned int mask = (0xFFFF >> (16 - (1 << f)));
+
+ int delta = bits & mask;
+
+ if ((unsigned int) delta >= ((mask + 1) >> 1))
+ delta -= mask + 1;
+
+ return delta;
+ }
+
+ inline unsigned int get_size (void) const
+ {
+ unsigned int f = deltaFormat;
+ if (unlikely (f < 1 || f > 3 || startSize > endSize)) return 3 * USHORT::static_size;
+ return USHORT::static_size * (4 + ((endSize - startSize) >> (4 - f)));
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE (this);
+ return TRACE_RETURN (c->check_struct (this) && c->check_range (this, this->get_size ()));
+ }
+
+ protected:
+ USHORT startSize; /* Smallest size to correct--in ppem */
+ USHORT endSize; /* Largest size to correct--in ppem */
+ USHORT deltaFormat; /* Format of DeltaValue array data: 1, 2, or 3
+ * 1 Signed 2-bit value, 8 values per uint16
+ * 2 Signed 4-bit value, 4 values per uint16
+ * 3 Signed 8-bit value, 2 values per uint16
+ */
+ USHORT deltaValue[VAR]; /* Array of compressed data */
+ public:
+ DEFINE_SIZE_ARRAY (6, deltaValue);
+};
+
+
+} /* namespace OT */
+
+
+#endif /* HB_OT_LAYOUT_COMMON_PRIVATE_HH */