/*
- * Copyright (C) 2007,2008,2009 Red Hat, Inc.
+ * Copyright © 2007,2008,2009 Red Hat, Inc.
+ * Copyright © 2010 Google, Inc.
*
- * This is part of HarfBuzz, an OpenType Layout engine library.
+ * 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
* 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.h"
+#include "hb-ot-layout-private.hh"
#include "hb-open-type-private.hh"
+#define NO_CONTEXT ((unsigned int) 0x110000)
+#define NOT_COVERED ((unsigned int) 0x110000)
+#define MAX_NESTING_LEVEL 8
+
+HB_BEGIN_DECLS
+HB_END_DECLS
+
+
/*
*
* OpenType Layout Common Table Formats
template <typename Type>
struct Record
{
- inline bool sanitize (SANITIZE_ARG_DEF, const void *base) {
- SANITIZE_DEBUG ();
- return SANITIZE (tag) && SANITIZE_BASE (offset, base);
+ inline int cmp (hb_tag_t a) const {
+ return tag.cmp (a);
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c, void *base) {
+ TRACE_SANITIZE ();
+ 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 : ArrayOf<Record<Type> > {
+struct RecordArrayOf : SortedArrayOf<Record<Type> > {
inline const Tag& get_tag (unsigned int i) const
{
- if (HB_UNLIKELY (i >= this->len)) return Null(Tag);
- return this->array[i].tag;
- }
- inline bool get_tags (unsigned int *record_count /* IN/OUT */,
- hb_tag_t *record_tags /* OUT */) 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
{
- unsigned int count = MIN (this->len, *record_count);
- for (unsigned int i = 0; i < count; i++)
- record_tags[i] = this->array[i].tag;
-
- *record_count = this->len;
- return !!this->len;
+ 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
{
- const Tag t = tag;
- // TODO bsearch
- unsigned int count = this->len;
- for (unsigned int i = 0; i < count; i++)
- {
- if (t == this->array[i].tag)
- {
+ int i = this->search (tag);
+ if (i != -1) {
if (index) *index = i;
return true;
- }
+ } else {
+ if (index) *index = Index::NOT_FOUND_INDEX;
+ return false;
}
- if (index) *index = NO_INDEX;
- return false;
}
};
struct RecordListOf : RecordArrayOf<Type>
{
inline const Type& operator [] (unsigned int i) const
- { return this+RecordArrayOf<Type>::operator[](i).offset; }
+ { return this+RecordArrayOf<Type>::operator [](i).offset; }
- inline bool sanitize (SANITIZE_ARG_DEF) {
- SANITIZE_DEBUG ();
- return RecordArrayOf<Type>::sanitize (SANITIZE_ARG, CONST_CHARP(this));
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE ();
+ return RecordArrayOf<Type>::sanitize (c, this);
}
};
-struct IndexArray : ArrayOf<USHORT>
+struct RangeRecord
{
- inline unsigned int operator [] (unsigned int i) const
- {
- if (HB_UNLIKELY (i >= this->len))
- return NO_INDEX;
- return this->array[i];
+ 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 get_indexes (unsigned int *_count /* IN/OUT */,
- unsigned int *_indexes /* OUT */) const
- {
- unsigned int count = MIN (this->len, *_count);
- for (unsigned int i = 0; i < count; i++)
- _indexes[i] = this->array[i];
- *_count = this->len;
- return !!this->len;
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE ();
+ return c->check_struct (this);
+ }
+
+ 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;
}
};
{ return featureIndex.len; }
inline hb_tag_t get_feature_index (unsigned int i) const
{ return featureIndex[i]; }
- inline bool get_feature_indexes (unsigned int *feature_count /* IN/OUT */,
- hb_tag_t *feature_tags /* OUT */) const
- { return featureIndex.get_indexes (feature_count, feature_tags); }
+ 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 int get_required_feature_index (void) const
+ inline unsigned int get_required_feature_index (void) const
{
if (reqFeatureIndex == 0xffff)
- return NO_INDEX;
+ return Index::NOT_FOUND_INDEX;
return reqFeatureIndex;;
}
- inline bool sanitize (SANITIZE_ARG_DEF) {
- SANITIZE_DEBUG ();
- return SANITIZE_SELF () && SANITIZE (featureIndex);
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE ();
+ return c->check_struct (this)
+ && featureIndex.sanitize (c);
}
Offset lookupOrder; /* = Null (reserved for an offset to a
* language system--if no required features
* = 0xFFFF */
IndexArray featureIndex; /* Array of indices into the FeatureList */
+ public:
+ DEFINE_SIZE_ARRAY (6, featureIndex);
};
-ASSERT_SIZE_DATA (LangSys, 6, "\0\0\xFF\xFF");
+DEFINE_NULL_DATA (LangSys, "\0\0\xFF\xFF");
struct Script
{ return langSys.len; }
inline const Tag& get_lang_sys_tag (unsigned int i) const
{ return langSys.get_tag (i); }
- inline bool get_lang_sys_tags (unsigned int *lang_sys_count /* IN/OUT */,
- hb_tag_t *lang_sys_tags /* OUT */) const
- { return langSys.get_tags (lang_sys_count, lang_sys_tags); }
+ 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 == NO_INDEX) return get_default_lang_sys ();
+ 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
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 (SANITIZE_ARG_DEF) {
- SANITIZE_DEBUG ();
- return SANITIZE_THIS (defaultLangSys) && SANITIZE_THIS (langSys);
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE ();
+ return defaultLangSys.sanitize (c, this)
+ && langSys.sanitize (c, this);
}
private:
RecordArrayOf<LangSys>
langSys; /* Array of LangSysRecords--listed
* alphabetically by LangSysTag */
+ public:
+ DEFINE_SIZE_ARRAY (4, langSys);
};
-ASSERT_SIZE (Script, 4);
typedef RecordListOf<Script> ScriptList;
-ASSERT_SIZE (ScriptList, 2);
struct Feature
{ return lookupIndex.len; }
inline hb_tag_t get_lookup_index (unsigned int i) const
{ return lookupIndex[i]; }
- inline bool get_lookup_indexes (unsigned int *lookup_count /* IN/OUT */,
- hb_tag_t *lookup_tags /* OUT */) const
- { return lookupIndex.get_indexes (lookup_count, lookup_tags); }
+ 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 bool sanitize (SANITIZE_ARG_DEF) {
- SANITIZE_DEBUG ();
- return SANITIZE_SELF () && SANITIZE (lookupIndex);
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE ();
+ return c->check_struct (this)
+ && lookupIndex.sanitize (c);
}
- /* TODO: implement get_feature_parameters() */
- /* TODO: implement FeatureSize and other special features? */
Offset 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);
};
-ASSERT_SIZE (Feature, 4);
typedef RecordListOf<Feature> FeatureList;
-ASSERT_SIZE (FeatureList, 2);
struct LookupFlag : USHORT
IgnoreBaseGlyphs = 0x0002u,
IgnoreLigatures = 0x0004u,
IgnoreMarks = 0x0008u,
+ IgnoreFlags = 0x000Eu,
UseMarkFilteringSet = 0x0010u,
Reserved = 0x00E0u,
- MarkAttachmentType = 0xFF00u,
+ MarkAttachmentType = 0xFF00u
};
+ public:
+ DEFINE_SIZE_STATIC (2);
};
-ASSERT_SIZE (LookupFlag, 2);
-
-struct LookupSubTable
-{
- inline bool sanitize (SANITIZE_ARG_DEF) {
- SANITIZE_DEBUG ();
- return SANITIZE_SELF ();
- }
-
- private:
- USHORT format; /* Subtable format. Different for GSUB and GPOS */
-};
-ASSERT_SIZE (LookupSubTable, 2);
struct Lookup
{
- inline const LookupSubTable& get_subtable (unsigned int i) const { return this+subTable[i]; }
inline unsigned int get_subtable_count (void) const { return subTable.len; }
inline unsigned int get_type (void) const { return lookupType; }
- inline unsigned int get_flag (void) const
+
+ /* 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 (HB_UNLIKELY (flag & LookupFlag::UseMarkFilteringSet))
+ if (unlikely (flag & LookupFlag::UseMarkFilteringSet))
{
- const USHORT &markFilteringSet = CONST_NEXT (USHORT, subTable);
+ const USHORT &markFilteringSet = StructAfter<USHORT> (subTable);
flag += (markFilteringSet << 16);
}
return flag;
}
- inline bool sanitize (SANITIZE_ARG_DEF) {
- SANITIZE_DEBUG ();
- if (!(SANITIZE_SELF () && SANITIZE_THIS (subTable))) return false;
- if (HB_UNLIKELY (lookupFlag & LookupFlag::UseMarkFilteringSet))
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE ();
+ /* Real sanitize of the subtables is done by GSUB/GPOS/... */
+ if (!(c->check_struct (this)
+ && subTable.sanitize (c))) return false;
+ if (unlikely (lookupFlag & LookupFlag::UseMarkFilteringSet))
{
- USHORT &markFilteringSet = NEXT (USHORT, subTable);
- if (!SANITIZE (markFilteringSet)) return false;
+ USHORT &markFilteringSet = StructAfter<USHORT> (subTable);
+ if (!markFilteringSet.sanitize (c)) return false;
}
return true;
}
USHORT lookupType; /* Different enumerations for GSUB and GPOS */
USHORT lookupFlag; /* Lookup qualifiers */
- OffsetArrayOf<LookupSubTable>
+ ArrayOf<Offset>
subTable; /* Array of SubTables */
- USHORT markFilteringSetX[0]; /* Index (base 0) into GDEF mark glyph sets
+ 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. */
-};
-ASSERT_SIZE (Lookup, 6);
-
-template <typename Type>
-struct OffsetListOf : OffsetArrayOf<Type>
-{
- inline const Type& operator [] (unsigned int i) const
- {
- if (HB_UNLIKELY (i >= this->len)) return Null(Type);
- return this+this->array[i];
- }
-
- inline bool sanitize (SANITIZE_ARG_DEF) {
- SANITIZE_DEBUG ();
- return OffsetArrayOf<Type>::sanitize (SANITIZE_ARG, CONST_CHARP(this));
- }
+ public:
+ DEFINE_SIZE_ARRAY2 (6, subTable, markFilteringSetX);
};
typedef OffsetListOf<Lookup> LookupList;
-ASSERT_SIZE (LookupList, 2);
/*
private:
inline unsigned int get_coverage (hb_codepoint_t glyph_id) const
{
- if (HB_UNLIKELY (glyph_id > 0xFFFF))
- return NOT_COVERED;
- GlyphID gid;
- gid = glyph_id;
- // TODO: bsearch
- unsigned int num_glyphs = glyphArray.len;
- for (unsigned int i = 0; i < num_glyphs; i++)
- if (gid == glyphArray[i])
+ int i = glyphArray.search (glyph_id);
+ if (i != -1)
return i;
return NOT_COVERED;
}
- inline bool sanitize (SANITIZE_ARG_DEF) {
- SANITIZE_DEBUG ();
- return SANITIZE (glyphArray);
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE ();
+ return glyphArray.sanitize (c);
}
private:
USHORT coverageFormat; /* Format identifier--format = 1 */
- ArrayOf<GlyphID>
+ SortedArrayOf<GlyphID>
glyphArray; /* Array of GlyphIDs--in numerical order */
-};
-ASSERT_SIZE (CoverageFormat1, 4);
-
-struct CoverageRangeRecord
-{
- friend struct CoverageFormat2;
-
- private:
- inline unsigned int get_coverage (hb_codepoint_t glyph_id) const
- {
- if (glyph_id >= start && glyph_id <= end)
- return (unsigned int) startCoverageIndex + (glyph_id - start);
- return NOT_COVERED;
- }
-
public:
- inline bool sanitize (SANITIZE_ARG_DEF) {
- SANITIZE_DEBUG ();
- return SANITIZE_SELF ();
- }
-
- private:
- GlyphID start; /* First GlyphID in the range */
- GlyphID end; /* Last GlyphID in the range */
- USHORT startCoverageIndex; /* Coverage Index of first GlyphID in
- * range */
+ DEFINE_SIZE_ARRAY (4, glyphArray);
};
-ASSERT_SIZE_DATA (CoverageRangeRecord, 6, "\000\001");
struct CoverageFormat2
{
private:
inline unsigned int get_coverage (hb_codepoint_t glyph_id) const
{
- // TODO: bsearch
- unsigned int count = rangeRecord.len;
- for (unsigned int i = 0; i < count; i++)
- {
- unsigned int coverage = rangeRecord[i].get_coverage (glyph_id);
- if (coverage != NOT_COVERED)
- return coverage;
+ 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 sanitize (SANITIZE_ARG_DEF) {
- SANITIZE_DEBUG ();
- return SANITIZE (rangeRecord);
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE ();
+ return rangeRecord.sanitize (c);
}
private:
USHORT coverageFormat; /* Format identifier--format = 2 */
- ArrayOf<CoverageRangeRecord>
+ SortedArrayOf<RangeRecord>
rangeRecord; /* Array of glyph ranges--ordered by
* Start GlyphID. rangeCount entries
* long */
+ public:
+ DEFINE_SIZE_ARRAY (4, rangeRecord);
};
-ASSERT_SIZE (CoverageFormat2, 4);
struct Coverage
{
- inline unsigned int operator() (hb_codepoint_t glyph_id) const { return get_coverage (glyph_id); }
+ inline unsigned int operator () (hb_codepoint_t glyph_id) const { return get_coverage (glyph_id); }
- unsigned int get_coverage (hb_codepoint_t glyph_id) const
+ 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);
+ case 1: return u.format1.get_coverage(glyph_id);
+ case 2: return u.format2.get_coverage(glyph_id);
default:return NOT_COVERED;
}
}
- bool sanitize (SANITIZE_ARG_DEF) {
- SANITIZE_DEBUG ();
- if (!SANITIZE (u.format)) return false;
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE ();
+ if (!u.format.sanitize (c)) return false;
switch (u.format) {
- case 1: return u.format1->sanitize (SANITIZE_ARG);
- case 2: return u.format2->sanitize (SANITIZE_ARG);
+ case 1: return u.format1.sanitize (c);
+ case 2: return u.format2.sanitize (c);
default:return true;
}
}
private:
union {
USHORT format; /* Format identifier */
- CoverageFormat1 format1[];
- CoverageFormat2 format2[];
+ CoverageFormat1 format1;
+ CoverageFormat2 format2;
} u;
+ public:
+ DEFINE_SIZE_UNION (2, format);
};
-ASSERT_SIZE (Coverage, 2);
/*
friend struct ClassDef;
private:
- inline hb_ot_layout_class_t get_class (hb_codepoint_t glyph_id) const
+ inline unsigned int get_class (hb_codepoint_t glyph_id) const
{
if ((unsigned int) (glyph_id - startGlyph) < classValue.len)
return classValue[glyph_id - startGlyph];
return 0;
}
- inline bool sanitize (SANITIZE_ARG_DEF) {
- SANITIZE_DEBUG ();
- return SANITIZE_SELF () && SANITIZE (classValue);
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE ();
+ return c->check_struct (this)
+ && classValue.sanitize (c);
}
USHORT classFormat; /* Format identifier--format = 1 */
GlyphID startGlyph; /* First GlyphID of the classValueArray */
ArrayOf<USHORT>
classValue; /* Array of Class Values--one per GlyphID */
-};
-ASSERT_SIZE (ClassDefFormat1, 6);
-
-struct ClassRangeRecord
-{
- friend struct ClassDefFormat2;
-
- private:
- inline hb_ot_layout_class_t get_class (hb_codepoint_t glyph_id) const
- {
- if (glyph_id >= start && glyph_id <= end)
- return classValue;
- return 0;
- }
-
public:
- inline bool sanitize (SANITIZE_ARG_DEF) {
- SANITIZE_DEBUG ();
- return SANITIZE_SELF ();
- }
-
- private:
- GlyphID start; /* First GlyphID in the range */
- GlyphID end; /* Last GlyphID in the range */
- USHORT classValue; /* Applied to all glyphs in the range */
+ DEFINE_SIZE_ARRAY (6, classValue);
};
-ASSERT_SIZE_DATA (ClassRangeRecord, 6, "\000\001");
struct ClassDefFormat2
{
friend struct ClassDef;
private:
- inline hb_ot_layout_class_t get_class (hb_codepoint_t glyph_id) const
+ inline unsigned int get_class (hb_codepoint_t glyph_id) const
{
- // TODO: bsearch
- unsigned int count = rangeRecord.len;
- for (unsigned int i = 0; i < count; i++)
- {
- int classValue = rangeRecord[i].get_class (glyph_id);
- if (classValue > 0)
- return classValue;
- }
+ int i = rangeRecord.search (glyph_id);
+ if (i != -1)
+ return rangeRecord[i].value;
return 0;
}
- inline bool sanitize (SANITIZE_ARG_DEF) {
- SANITIZE_DEBUG ();
- return SANITIZE (rangeRecord);
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE ();
+ return rangeRecord.sanitize (c);
}
USHORT classFormat; /* Format identifier--format = 2 */
- ArrayOf<ClassRangeRecord>
+ SortedArrayOf<RangeRecord>
rangeRecord; /* Array of glyph ranges--ordered by
* Start GlyphID */
+ public:
+ DEFINE_SIZE_ARRAY (4, rangeRecord);
};
-ASSERT_SIZE (ClassDefFormat2, 4);
struct ClassDef
{
- inline unsigned int operator() (hb_codepoint_t glyph_id) const { return get_class (glyph_id); }
+ inline unsigned int operator () (hb_codepoint_t glyph_id) const { return get_class (glyph_id); }
- hb_ot_layout_class_t get_class (hb_codepoint_t glyph_id) const
+ 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);
+ case 1: return u.format1.get_class(glyph_id);
+ case 2: return u.format2.get_class(glyph_id);
default:return 0;
}
}
- bool sanitize (SANITIZE_ARG_DEF) {
- SANITIZE_DEBUG ();
- if (!SANITIZE (u.format)) return false;
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE ();
+ if (!u.format.sanitize (c)) return false;
switch (u.format) {
- case 1: return u.format1->sanitize (SANITIZE_ARG);
- case 2: return u.format2->sanitize (SANITIZE_ARG);
+ case 1: return u.format1.sanitize (c);
+ case 2: return u.format2.sanitize (c);
default:return true;
}
}
private:
union {
USHORT format; /* Format identifier */
- ClassDefFormat1 format1[];
- ClassDefFormat2 format2[];
+ ClassDefFormat1 format1;
+ ClassDefFormat2 format2;
} u;
+ public:
+ DEFINE_SIZE_UNION (2, format);
};
-ASSERT_SIZE (ClassDef, 2);
/*
struct Device
{
- inline int operator() (unsigned int ppem_size) const { return get_delta (ppem_size); }
- int get_delta (unsigned int ppem_size) const
+ 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 (HB_UNLIKELY (f < 1 || f > 3))
+ if (unlikely (f < 1 || f > 3))
return 0;
if (ppem_size < startSize || ppem_size > endSize)
return delta;
}
- inline unsigned int get_size () const
+ inline unsigned int get_size (void) const
{
unsigned int f = deltaFormat;
- if (HB_UNLIKELY (f < 1 || f > 3 || startSize > endSize)) return sizeof (*this);
- return sizeof (*this) + ((endSize - startSize + (1 << (4 - f)) - 1) >> (4 - f));
+ if (unlikely (f < 1 || f > 3 || startSize > endSize)) return 3 * USHORT::static_size;
+ return USHORT::static_size * (4 + ((endSize - startSize) >> (4 - f)));
}
- bool sanitize (SANITIZE_ARG_DEF) {
- SANITIZE_DEBUG ();
- return SANITIZE_GET_SIZE ();
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE ();
+ return c->check_struct (this)
+ && c->check_range (this, this->get_size ());
}
private:
- 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 */
- USHORT deltaValue[]; /* Array of compressed data */
+ 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);
};
-ASSERT_SIZE (Device, 6);
+HB_BEGIN_DECLS
+HB_END_DECLS
+
#endif /* HB_OT_LAYOUT_COMMON_PRIVATE_HH */
projects / framework / uifw / harfbuzz.git / blobdiff