walkero
/
harfbuzz
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
harfbuzz/src/hb-ot-layout-common.hh

3341 lines
96 KiB
C++
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/*
* 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_HH
#define HB_OT_LAYOUT_COMMON_HH
#include "hb.hh"
#include "hb-ot-layout.hh"
#include "hb-open-type.hh"
#include "hb-set.hh"
#include "hb-bimap.hh"
#include "OT/Layout/Common/Coverage.hh"
#include "OT/Layout/types.hh"
// TODO(garretrieger): cleanup these after migration.
using OT::Layout::Common::Coverage;
using OT::Layout::Common::RangeRecord;
using OT::Layout::SmallTypes;
using OT::Layout::MediumTypes;
#ifndef HB_MAX_NESTING_LEVEL
#define HB_MAX_NESTING_LEVEL 64
#endif
#ifndef HB_MAX_CONTEXT_LENGTH
#define HB_MAX_CONTEXT_LENGTH 64
#endif
#ifndef HB_CLOSURE_MAX_STAGES
/*
* The maximum number of times a lookup can be applied during shaping.
* Used to limit the number of iterations of the closure algorithm.
* This must be larger than the number of times add_gsub_pause() is
* called in a collect_features call of any shaper.
*/
#define HB_CLOSURE_MAX_STAGES 12
#endif
#ifndef HB_MAX_SCRIPTS
#define HB_MAX_SCRIPTS 500
#endif
#ifndef HB_MAX_LANGSYS
#define HB_MAX_LANGSYS 2000
#endif
#ifndef HB_MAX_LANGSYS_FEATURE_COUNT
#define HB_MAX_LANGSYS_FEATURE_COUNT 50000
#endif
#ifndef HB_MAX_FEATURE_INDICES
#define HB_MAX_FEATURE_INDICES 1500
#endif
#ifndef HB_MAX_LOOKUP_VISIT_COUNT
#define HB_MAX_LOOKUP_VISIT_COUNT 35000
#endif
namespace OT {
template<typename Iterator>
static inline void ClassDef_serialize (hb_serialize_context_t *c,
Iterator it);
static void ClassDef_remap_and_serialize (
hb_serialize_context_t *c,
const hb_set_t &klasses,
bool use_class_zero,
hb_sorted_vector_t<hb_pair_t<hb_codepoint_t, hb_codepoint_t>> &glyph_and_klass, /* IN/OUT */
hb_map_t *klass_map /*IN/OUT*/);
struct hb_prune_langsys_context_t
{
hb_prune_langsys_context_t (const void *table_,
hb_hashmap_t<unsigned, hb::unique_ptr<hb_set_t>> *script_langsys_map_,
const hb_map_t *duplicate_feature_map_,
hb_set_t *new_collected_feature_indexes_)
:table (table_),
script_langsys_map (script_langsys_map_),
duplicate_feature_map (duplicate_feature_map_),
new_feature_indexes (new_collected_feature_indexes_),
script_count (0),langsys_feature_count (0) {}
bool visitScript ()
{ return script_count++ < HB_MAX_SCRIPTS; }
bool visitLangsys (unsigned feature_count)
{
langsys_feature_count += feature_count;
return langsys_feature_count < HB_MAX_LANGSYS_FEATURE_COUNT;
}
public:
const void *table;
hb_hashmap_t<unsigned, hb::unique_ptr<hb_set_t>> *script_langsys_map;
const hb_map_t *duplicate_feature_map;
hb_set_t *new_feature_indexes;
private:
unsigned script_count;
unsigned langsys_feature_count;
};
struct hb_subset_layout_context_t :
hb_dispatch_context_t<hb_subset_layout_context_t, hb_empty_t, HB_DEBUG_SUBSET>
{
const char *get_name () { return "SUBSET_LAYOUT"; }
static return_t default_return_value () { return hb_empty_t (); }
bool visitScript ()
{
return script_count++ < HB_MAX_SCRIPTS;
}
bool visitLangSys ()
{
return langsys_count++ < HB_MAX_LANGSYS;
}
bool visitFeatureIndex (int count)
{
feature_index_count += count;
return feature_index_count < HB_MAX_FEATURE_INDICES;
}
bool visitLookupIndex()
{
lookup_index_count++;
return lookup_index_count < HB_MAX_LOOKUP_VISIT_COUNT;
}
hb_subset_context_t *subset_context;
const hb_tag_t table_tag;
const hb_map_t *lookup_index_map;
const hb_hashmap_t<unsigned, hb::unique_ptr<hb_set_t>> *script_langsys_map;
const hb_map_t *feature_index_map;
unsigned cur_script_index;
hb_subset_layout_context_t (hb_subset_context_t *c_,
hb_tag_t tag_,
hb_map_t *lookup_map_,
hb_hashmap_t<unsigned, hb::unique_ptr<hb_set_t>> *script_langsys_map_,
hb_map_t *feature_index_map_) :
subset_context (c_),
table_tag (tag_),
lookup_index_map (lookup_map_),
script_langsys_map (script_langsys_map_),
feature_index_map (feature_index_map_),
cur_script_index (0xFFFFu),
script_count (0),
langsys_count (0),
feature_index_count (0),
lookup_index_count (0)
{}
private:
unsigned script_count;
unsigned langsys_count;
unsigned feature_index_count;
unsigned lookup_index_count;
};
struct hb_collect_variation_indices_context_t :
hb_dispatch_context_t<hb_collect_variation_indices_context_t>
{
template <typename T>
return_t dispatch (const T &obj) { obj.collect_variation_indices (this); return hb_empty_t (); }
static return_t default_return_value () { return hb_empty_t (); }
hb_set_t *layout_variation_indices;
const hb_set_t *glyph_set;
const hb_map_t *gpos_lookups;
hb_collect_variation_indices_context_t (hb_set_t *layout_variation_indices_,
const hb_set_t *glyph_set_,
const hb_map_t *gpos_lookups_) :
layout_variation_indices (layout_variation_indices_),
glyph_set (glyph_set_),
gpos_lookups (gpos_lookups_) {}
};
template<typename OutputArray>
struct subset_offset_array_t
{
subset_offset_array_t (hb_subset_context_t *subset_context_,
OutputArray& out_,
const void *base_) : subset_context (subset_context_),
out (out_), base (base_) {}
template <typename T>
bool operator () (T&& offset)
{
auto snap = subset_context->serializer->snapshot ();
auto *o = out.serialize_append (subset_context->serializer);
if (unlikely (!o)) return false;
bool ret = o->serialize_subset (subset_context, offset, base);
if (!ret)
{
out.pop ();
subset_context->serializer->revert (snap);
}
return ret;
}
private:
hb_subset_context_t *subset_context;
OutputArray &out;
const void *base;
};
template<typename OutputArray, typename Arg>
struct subset_offset_array_arg_t
{
subset_offset_array_arg_t (hb_subset_context_t *subset_context_,
OutputArray& out_,
const void *base_,
Arg &&arg_) : subset_context (subset_context_), out (out_),
base (base_), arg (arg_) {}
template <typename T>
bool operator () (T&& offset)
{
auto snap = subset_context->serializer->snapshot ();
auto *o = out.serialize_append (subset_context->serializer);
if (unlikely (!o)) return false;
bool ret = o->serialize_subset (subset_context, offset, base, arg);
if (!ret)
{
out.pop ();
subset_context->serializer->revert (snap);
}
return ret;
}
private:
hb_subset_context_t *subset_context;
OutputArray &out;
const void *base;
Arg &&arg;
};
/*
* Helper to subset an array of offsets. Subsets the thing pointed to by each offset
* and discards the offset in the array if the subset operation results in an empty
* thing.
*/
struct
{
template<typename OutputArray>
subset_offset_array_t<OutputArray>
operator () (hb_subset_context_t *subset_context, OutputArray& out,
const void *base) const
{ return subset_offset_array_t<OutputArray> (subset_context, out, base); }
/* Variant with one extra argument passed to serialize_subset */
template<typename OutputArray, typename Arg>
subset_offset_array_arg_t<OutputArray, Arg>
operator () (hb_subset_context_t *subset_context, OutputArray& out,
const void *base, Arg &&arg) const
{ return subset_offset_array_arg_t<OutputArray, Arg> (subset_context, out, base, arg); }
}
HB_FUNCOBJ (subset_offset_array);
template<typename OutputArray>
struct subset_record_array_t
{
subset_record_array_t (hb_subset_layout_context_t *c_, OutputArray* out_,
const void *base_) : subset_layout_context (c_),
out (out_), base (base_) {}
template <typename T>
void
operator () (T&& record)
{
auto snap = subset_layout_context->subset_context->serializer->snapshot ();
bool ret = record.subset (subset_layout_context, base);
if (!ret) subset_layout_context->subset_context->serializer->revert (snap);
else out->len++;
}
private:
hb_subset_layout_context_t *subset_layout_context;
OutputArray *out;
const void *base;
};
/*
* Helper to subset a RecordList/record array. Subsets each Record in the array and
* discards the record if the subset operation returns false.
*/
struct
{
template<typename OutputArray>
subset_record_array_t<OutputArray>
operator () (hb_subset_layout_context_t *c, OutputArray* out,
const void *base) const
{ return subset_record_array_t<OutputArray> (c, out, base); }
}
HB_FUNCOBJ (subset_record_array);
template<typename OutputArray>
struct serialize_math_record_array_t
{
serialize_math_record_array_t (hb_serialize_context_t *serialize_context_,
OutputArray& out_,
const void *base_) : serialize_context (serialize_context_),
out (out_), base (base_) {}
template <typename T>
bool operator () (T&& record)
{
if (!serialize_context->copy (record, base)) return false;
out.len++;
return true;
}
private:
hb_serialize_context_t *serialize_context;
OutputArray &out;
const void *base;
};
/*
* Helper to serialize an array of MATH records.
*/
struct
{
template<typename OutputArray>
serialize_math_record_array_t<OutputArray>
operator () (hb_serialize_context_t *serialize_context, OutputArray& out,
const void *base) const
{ return serialize_math_record_array_t<OutputArray> (serialize_context, out, base); }
}
HB_FUNCOBJ (serialize_math_record_array);
/*
*
* OpenType Layout Common Table Formats
*
*/
/*
* Script, ScriptList, LangSys, Feature, FeatureList, Lookup, LookupList
*/
struct IndexArray : Array16Of<Index>
{
bool intersects (const hb_map_t *indexes) const
{ return hb_any (*this, indexes); }
template <typename Iterator,
hb_requires (hb_is_iterator (Iterator))>
void serialize (hb_serialize_context_t *c,
hb_subset_layout_context_t *l,
Iterator it)
{
if (!it) return;
if (unlikely (!c->extend_min ((*this)))) return;
for (const auto _ : it)
{
if (!l->visitLookupIndex()) break;
Index i;
i = _;
c->copy (i);
this->len++;
}
}
unsigned int get_indexes (unsigned int start_offset,
unsigned int *_count /* IN/OUT */,
unsigned int *_indexes /* OUT */) const
{
if (_count)
{
+ this->sub_array (start_offset, _count)
| hb_sink (hb_array (_indexes, *_count))
;
}
return this->len;
}
void add_indexes_to (hb_set_t* output /* OUT */) const
{
output->add_array (as_array ());
}
};
struct Record_sanitize_closure_t {
hb_tag_t tag;
const void *list_base;
};
template <typename Type>
struct Record
{
int cmp (hb_tag_t a) const { return tag.cmp (a); }
bool subset (hb_subset_layout_context_t *c, const void *base) const
{
TRACE_SUBSET (this);
auto *out = c->subset_context->serializer->embed (this);
if (unlikely (!out)) return_trace (false);
bool ret = out->offset.serialize_subset (c->subset_context, offset, base, c, &tag);
return_trace (ret);
}
bool sanitize (hb_sanitize_context_t *c, const void *base) const
{
TRACE_SANITIZE (this);
const Record_sanitize_closure_t closure = {tag, base};
return_trace (c->check_struct (this) && offset.sanitize (c, base, &closure));
}
Tag tag; /* 4-byte Tag identifier */
Offset16To<Type>
offset; /* Offset from beginning of object holding
* the Record */
public:
DEFINE_SIZE_STATIC (6);
};
template <typename Type>
struct RecordArrayOf : SortedArray16Of<Record<Type>>
{
const Offset16To<Type>& get_offset (unsigned int i) const
{ return (*this)[i].offset; }
Offset16To<Type>& get_offset (unsigned int i)
{ return (*this)[i].offset; }
const Tag& get_tag (unsigned int i) const
{ return (*this)[i].tag; }
unsigned int get_tags (unsigned int start_offset,
unsigned int *record_count /* IN/OUT */,
hb_tag_t *record_tags /* OUT */) const
{
if (record_count)
{
+ this->sub_array (start_offset, record_count)
| hb_map (&Record<Type>::tag)
| hb_sink (hb_array (record_tags, *record_count))
;
}
return this->len;
}
bool find_index (hb_tag_t tag, unsigned int *index) const
{
return this->bfind (tag, index, HB_NOT_FOUND_STORE, Index::NOT_FOUND_INDEX);
}
};
template <typename Type>
struct RecordListOf : RecordArrayOf<Type>
{
const Type& operator [] (unsigned int i) const
{ return this+this->get_offset (i); }
bool subset (hb_subset_context_t *c,
hb_subset_layout_context_t *l) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->start_embed (*this);
if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
+ this->iter ()
| hb_apply (subset_record_array (l, out, this))
;
return_trace (true);
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (RecordArrayOf<Type>::sanitize (c, this));
}
};
/* https://docs.microsoft.com/en-us/typography/opentype/spec/features_pt#size */
struct FeatureParamsSize
{
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
if (unlikely (!c->check_struct (this))) return_trace (false);
/* This subtable has some "history", if you will. Some earlier versions of
* Adobe tools calculated the offset of the FeatureParams subtable from the
* beginning of the FeatureList table! Now, that is dealt with in the
* Feature implementation. But we still need to be able to tell junk from
* real data. Note: We don't check that the nameID actually exists.
*
* Read Roberts wrote on 9/15/06 on opentype-list@indx.co.uk :
*
* Yes, it is correct that a new version of the AFDKO (version 2.0) will be
* coming out soon, and that the makeotf program will build a font with a
* 'size' feature that is correct by the specification.
*
* The specification for this feature tag is in the "OpenType Layout Tag
* Registry". You can see a copy of this at:
* https://docs.microsoft.com/en-us/typography/opentype/spec/features_pt#tag-size
*
* Here is one set of rules to determine if the 'size' feature is built
* correctly, or as by the older versions of MakeOTF. You may be able to do
* better.
*
* Assume that the offset to the size feature is according to specification,
* and make the following value checks. If it fails, assume the size
* feature is calculated as versions of MakeOTF before the AFDKO 2.0 built it.
* If this fails, reject the 'size' feature. The older makeOTF's calculated the
* offset from the beginning of the FeatureList table, rather than from the
* beginning of the 'size' Feature table.
*
* If "design size" == 0:
* fails check
*
* Else if ("subfamily identifier" == 0 and
* "range start" == 0 and
* "range end" == 0 and
* "range start" == 0 and
* "menu name ID" == 0)
* passes check: this is the format used when there is a design size
* specified, but there is no recommended size range.
*
* Else if ("design size" < "range start" or
* "design size" > "range end" or
* "range end" <= "range start" or
* "menu name ID" < 256 or
* "menu name ID" > 32767 or
* menu name ID is not a name ID which is actually in the name table)
* fails test
* Else
* passes test.
*/
if (!designSize)
return_trace (false);
else if (subfamilyID == 0 &&
subfamilyNameID == 0 &&
rangeStart == 0 &&
rangeEnd == 0)
return_trace (true);
else if (designSize < rangeStart ||
designSize > rangeEnd ||
subfamilyNameID < 256 ||
subfamilyNameID > 32767)
return_trace (false);
else
return_trace (true);
}
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
return_trace ((bool) c->serializer->embed (*this));
}
HBUINT16 designSize; /* Represents the design size in 720/inch
* units (decipoints). The design size entry
* must be non-zero. When there is a design
* size but no recommended size range, the
* rest of the array will consist of zeros. */
HBUINT16 subfamilyID; /* Has no independent meaning, but serves
* as an identifier that associates fonts
* in a subfamily. All fonts which share a
* Preferred or Font Family name and which
* differ only by size range shall have the
* same subfamily value, and no fonts which
* differ in weight or style shall have the
* same subfamily value. If this value is
* zero, the remaining fields in the array
* will be ignored. */
NameID subfamilyNameID;/* If the preceding value is non-zero, this
* value must be set in the range 256 - 32767
* (inclusive). It records the value of a
* field in the name table, which must
* contain English-language strings encoded
* in Windows Unicode and Macintosh Roman,
* and may contain additional strings
* localized to other scripts and languages.
* Each of these strings is the name an
* application should use, in combination
* with the family name, to represent the
* subfamily in a menu. Applications will
* choose the appropriate version based on
* their selection criteria. */
HBUINT16 rangeStart; /* Large end of the recommended usage range
* (inclusive), stored in 720/inch units
* (decipoints). */
HBUINT16 rangeEnd; /* Small end of the recommended usage range
(exclusive), stored in 720/inch units
* (decipoints). */
public:
DEFINE_SIZE_STATIC (10);
};
/* https://docs.microsoft.com/en-us/typography/opentype/spec/features_pt#ssxx */
struct FeatureParamsStylisticSet
{
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
/* Right now minorVersion is at zero. Which means, any table supports
* the uiNameID field. */
return_trace (c->check_struct (this));
}
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
return_trace ((bool) c->serializer->embed (*this));
}
HBUINT16 version; /* (set to 0): This corresponds to a “minor”
* version number. Additional data may be
* added to the end of this Feature Parameters
* table in the future. */
NameID uiNameID; /* The 'name' table name ID that specifies a
* string (or strings, for multiple languages)
* for a user-interface label for this
* feature. The values of uiLabelNameId and
* sampleTextNameId are expected to be in the
* font-specific name ID range (256-32767),
* though that is not a requirement in this
* Feature Parameters specification. The
* user-interface label for the feature can
* be provided in multiple languages. An
* English string should be included as a
* fallback. The string should be kept to a
* minimal length to fit comfortably with
* different application interfaces. */
public:
DEFINE_SIZE_STATIC (4);
};
/* https://docs.microsoft.com/en-us/typography/opentype/spec/features_ae#cv01-cv99 */
struct FeatureParamsCharacterVariants
{
unsigned
get_characters (unsigned start_offset, unsigned *char_count, hb_codepoint_t *chars) const
{
if (char_count)
{
+ characters.sub_array (start_offset, char_count)
| hb_sink (hb_array (chars, *char_count))
;
}
return characters.len;
}
unsigned get_size () const
{ return min_size + characters.len * HBUINT24::static_size; }
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
return_trace ((bool) c->serializer->embed (*this));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) &&
characters.sanitize (c));
}
HBUINT16 format; /* Format number is set to 0. */
NameID featUILableNameID; /* The ‘name’ table name ID that
* specifies a string (or strings,
* for multiple languages) for a
* user-interface label for this
* feature. (May be NULL.) */
NameID featUITooltipTextNameID;/* The ‘name’ table name ID that
* specifies a string (or strings,
* for multiple languages) that an
* application can use for tooltip
* text for this feature. (May be
* nullptr.) */
NameID sampleTextNameID; /* The ‘name’ table name ID that
* specifies sample text that
* illustrates the effect of this
* feature. (May be NULL.) */
HBUINT16 numNamedParameters; /* Number of named parameters. (May
* be zero.) */
NameID firstParamUILabelNameID;/* The first ‘name’ table name ID
* used to specify strings for
* user-interface labels for the
* feature parameters. (Must be zero
* if numParameters is zero.) */
Array16Of<HBUINT24>
characters; /* Array of the Unicode Scalar Value
* of the characters for which this
* feature provides glyph variants.
* (May be zero.) */
public:
DEFINE_SIZE_ARRAY (14, characters);
};
struct FeatureParams
{
bool sanitize (hb_sanitize_context_t *c, hb_tag_t tag) const
{
#ifdef HB_NO_LAYOUT_FEATURE_PARAMS
return true;
#endif
TRACE_SANITIZE (this);
if (tag == HB_TAG ('s','i','z','e'))
return_trace (u.size.sanitize (c));
if ((tag & 0xFFFF0000u) == HB_TAG ('s','s','\0','\0')) /* ssXX */
return_trace (u.stylisticSet.sanitize (c));
if ((tag & 0xFFFF0000u) == HB_TAG ('c','v','\0','\0')) /* cvXX */
return_trace (u.characterVariants.sanitize (c));
return_trace (true);
}
bool subset (hb_subset_context_t *c, const Tag* tag) const
{
TRACE_SUBSET (this);
if (!tag) return_trace (false);
if (*tag == HB_TAG ('s','i','z','e'))
return_trace (u.size.subset (c));
if ((*tag & 0xFFFF0000u) == HB_TAG ('s','s','\0','\0')) /* ssXX */
return_trace (u.stylisticSet.subset (c));
if ((*tag & 0xFFFF0000u) == HB_TAG ('c','v','\0','\0')) /* cvXX */
return_trace (u.characterVariants.subset (c));
return_trace (false);
}
#ifndef HB_NO_LAYOUT_FEATURE_PARAMS
const FeatureParamsSize& get_size_params (hb_tag_t tag) const
{
if (tag == HB_TAG ('s','i','z','e'))
return u.size;
return Null (FeatureParamsSize);
}
const FeatureParamsStylisticSet& get_stylistic_set_params (hb_tag_t tag) const
{
if ((tag & 0xFFFF0000u) == HB_TAG ('s','s','\0','\0')) /* ssXX */
return u.stylisticSet;
return Null (FeatureParamsStylisticSet);
}
const FeatureParamsCharacterVariants& get_character_variants_params (hb_tag_t tag) const
{
if ((tag & 0xFFFF0000u) == HB_TAG ('c','v','\0','\0')) /* cvXX */
return u.characterVariants;
return Null (FeatureParamsCharacterVariants);
}
#endif
private:
union {
FeatureParamsSize size;
FeatureParamsStylisticSet stylisticSet;
FeatureParamsCharacterVariants characterVariants;
} u;
public:
DEFINE_SIZE_MIN (0);
};
struct Feature
{
unsigned int get_lookup_count () const
{ return lookupIndex.len; }
hb_tag_t get_lookup_index (unsigned int i) const
{ return lookupIndex[i]; }
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); }
void add_lookup_indexes_to (hb_set_t *lookup_indexes) const
{ lookupIndex.add_indexes_to (lookup_indexes); }
const FeatureParams &get_feature_params () const
{ return this+featureParams; }
bool intersects_lookup_indexes (const hb_map_t *lookup_indexes) const
{ return lookupIndex.intersects (lookup_indexes); }
bool subset (hb_subset_context_t *c,
hb_subset_layout_context_t *l,
const Tag *tag = nullptr) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->start_embed (*this);
if (unlikely (!out || !c->serializer->extend_min (out))) return_trace (false);
out->featureParams.serialize_subset (c, featureParams, this, tag);
auto it =
+ hb_iter (lookupIndex)
| hb_filter (l->lookup_index_map)
| hb_map (l->lookup_index_map)
;
out->lookupIndex.serialize (c->serializer, l, it);
// The decision to keep or drop this feature is already made before we get here
// so always retain it.
return_trace (true);
}
bool sanitize (hb_sanitize_context_t *c,
const Record_sanitize_closure_t *closure = nullptr) const
{
TRACE_SANITIZE (this);
if (unlikely (!(c->check_struct (this) && lookupIndex.sanitize (c))))
return_trace (false);
/* Some earlier versions of Adobe tools calculated the offset of the
* FeatureParams subtable from the beginning of the FeatureList table!
*
* If sanitizing "failed" for the FeatureParams subtable, try it with the
* alternative location. We would know sanitize "failed" if old value
* of the offset was non-zero, but it's zeroed now.
*
* Only do this for the 'size' feature, since at the time of the faulty
* Adobe tools, only the 'size' feature had FeatureParams defined.
*/
if (likely (featureParams.is_null ()))
return_trace (true);
unsigned int orig_offset = featureParams;
if (unlikely (!featureParams.sanitize (c, this, closure ? closure->tag : HB_TAG_NONE)))
return_trace (false);
if (featureParams == 0 && closure &&
closure->tag == HB_TAG ('s','i','z','e') &&
closure->list_base && closure->list_base < this)
{
unsigned int new_offset_int = orig_offset -
(((char *) this) - ((char *) closure->list_base));
Offset16To<FeatureParams> new_offset;
/* Check that it would not overflow. */
new_offset = new_offset_int;
if (new_offset == new_offset_int &&
c->try_set (&featureParams, new_offset_int) &&
!featureParams.sanitize (c, this, closure ? closure->tag : HB_TAG_NONE))
return_trace (false);
}
return_trace (true);
}
Offset16To<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_SIZED (4, lookupIndex);
};
struct RecordListOfFeature : RecordListOf<Feature>
{
bool subset (hb_subset_context_t *c,
hb_subset_layout_context_t *l) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->start_embed (*this);
if (unlikely (!out || !c->serializer->extend_min (out))) return_trace (false);
unsigned count = this->len;
+ hb_zip (*this, hb_range (count))
| hb_filter (l->feature_index_map, hb_second)
| hb_map (hb_first)
| hb_apply (subset_record_array (l, out, this))
;
return_trace (true);
}
};
typedef RecordListOf<Feature> FeatureList;
struct LangSys
{
unsigned int get_feature_count () const
{ return featureIndex.len; }
hb_tag_t get_feature_index (unsigned int i) const
{ return featureIndex[i]; }
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); }
void add_feature_indexes_to (hb_set_t *feature_indexes) const
{ featureIndex.add_indexes_to (feature_indexes); }
bool has_required_feature () const { return reqFeatureIndex != 0xFFFFu; }
unsigned int get_required_feature_index () const
{
if (reqFeatureIndex == 0xFFFFu)
return Index::NOT_FOUND_INDEX;
return reqFeatureIndex;
}
LangSys* copy (hb_serialize_context_t *c) const
{
TRACE_SERIALIZE (this);
return_trace (c->embed (*this));
}
bool compare (const LangSys& o, const hb_map_t *feature_index_map) const
{
if (reqFeatureIndex != o.reqFeatureIndex)
return false;
auto iter =
+ hb_iter (featureIndex)
| hb_filter (feature_index_map)
| hb_map (feature_index_map)
;
auto o_iter =
+ hb_iter (o.featureIndex)
| hb_filter (feature_index_map)
| hb_map (feature_index_map)
;
for (; iter && o_iter; iter++, o_iter++)
{
unsigned a = *iter;
unsigned b = *o_iter;
if (a != b) return false;
}
if (iter || o_iter) return false;
return true;
}
void collect_features (hb_prune_langsys_context_t *c) const
{
if (!has_required_feature () && !get_feature_count ()) return;
if (has_required_feature () &&
c->duplicate_feature_map->has (reqFeatureIndex))
c->new_feature_indexes->add (get_required_feature_index ());
+ hb_iter (featureIndex)
| hb_filter (c->duplicate_feature_map)
| hb_sink (c->new_feature_indexes)
;
}
bool subset (hb_subset_context_t *c,
hb_subset_layout_context_t *l,
const Tag *tag = nullptr) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->start_embed (*this);
if (unlikely (!out || !c->serializer->extend_min (out))) return_trace (false);
const unsigned *v;
out->reqFeatureIndex = l->feature_index_map->has (reqFeatureIndex, &v) ? *v : 0xFFFFu;
if (!l->visitFeatureIndex (featureIndex.len))
return_trace (false);
auto it =
+ hb_iter (featureIndex)
| hb_filter (l->feature_index_map)
| hb_map (l->feature_index_map)
;
bool ret = bool (it);
out->featureIndex.serialize (c->serializer, l, it);
return_trace (ret);
}
bool sanitize (hb_sanitize_context_t *c,
const Record_sanitize_closure_t * = nullptr) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) && featureIndex.sanitize (c));
}
Offset16 lookupOrderZ; /* = Null (reserved for an offset to a
* reordering table) */
HBUINT16 reqFeatureIndex;/* Index of a feature required for this
* language system--if no required features
* = 0xFFFFu */
IndexArray featureIndex; /* Array of indices into the FeatureList */
public:
DEFINE_SIZE_ARRAY_SIZED (6, featureIndex);
};
DECLARE_NULL_NAMESPACE_BYTES (OT, LangSys);
struct Script
{
unsigned int get_lang_sys_count () const
{ return langSys.len; }
const Tag& get_lang_sys_tag (unsigned int i) const
{ return langSys.get_tag (i); }
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); }
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;
}
bool find_lang_sys_index (hb_tag_t tag, unsigned int *index) const
{ return langSys.find_index (tag, index); }
bool has_default_lang_sys () const { return defaultLangSys != 0; }
const LangSys& get_default_lang_sys () const { return this+defaultLangSys; }
void prune_langsys (hb_prune_langsys_context_t *c,
unsigned script_index) const
{
if (!has_default_lang_sys () && !get_lang_sys_count ()) return;
if (!c->visitScript ()) return;
if (!c->script_langsys_map->has (script_index))
{
if (unlikely (!c->script_langsys_map->set (script_index, hb::unique_ptr<hb_set_t> {hb_set_create ()})))
return;
}
unsigned langsys_count = get_lang_sys_count ();
if (has_default_lang_sys ())
{
//only collect features from non-redundant langsys
const LangSys& d = get_default_lang_sys ();
if (c->visitLangsys (d.get_feature_count ())) {
d.collect_features (c);
}
for (auto _ : + hb_zip (langSys, hb_range (langsys_count)))
{
const LangSys& l = this+_.first.offset;
if (!c->visitLangsys (l.get_feature_count ())) continue;
if (l.compare (d, c->duplicate_feature_map)) continue;
l.collect_features (c);
c->script_langsys_map->get (script_index)->add (_.second);
}
}
else
{
for (auto _ : + hb_zip (langSys, hb_range (langsys_count)))
{
const LangSys& l = this+_.first.offset;
if (!c->visitLangsys (l.get_feature_count ())) continue;
l.collect_features (c);
c->script_langsys_map->get (script_index)->add (_.second);
}
}
}
bool subset (hb_subset_context_t *c,
hb_subset_layout_context_t *l,
const Tag *tag) const
{
TRACE_SUBSET (this);
if (!l->visitScript ()) return_trace (false);
if (tag && !c->plan->layout_scripts->has (*tag))
return false;
auto *out = c->serializer->start_embed (*this);
if (unlikely (!out || !c->serializer->extend_min (out))) return_trace (false);
bool defaultLang = false;
if (has_default_lang_sys ())
{
c->serializer->push ();
const LangSys& ls = this+defaultLangSys;
bool ret = ls.subset (c, l);
if (!ret && tag && *tag != HB_TAG ('D', 'F', 'L', 'T'))
{
c->serializer->pop_discard ();
out->defaultLangSys = 0;
}
else
{
c->serializer->add_link (out->defaultLangSys, c->serializer->pop_pack ());
defaultLang = true;
}
}
const hb_set_t *active_langsys = l->script_langsys_map->get (l->cur_script_index);
if (active_langsys)
{
unsigned count = langSys.len;
+ hb_zip (langSys, hb_range (count))
| hb_filter (active_langsys, hb_second)
| hb_map (hb_first)
| hb_filter ([=] (const Record<LangSys>& record) {return l->visitLangSys (); })
| hb_apply (subset_record_array (l, &(out->langSys), this))
;
}
return_trace (bool (out->langSys.len) || defaultLang || l->table_tag == HB_OT_TAG_GSUB);
}
bool sanitize (hb_sanitize_context_t *c,
const Record_sanitize_closure_t * = nullptr) const
{
TRACE_SANITIZE (this);
return_trace (defaultLangSys.sanitize (c, this) && langSys.sanitize (c, this));
}
protected:
Offset16To<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_SIZED (4, langSys);
};
struct RecordListOfScript : RecordListOf<Script>
{
bool subset (hb_subset_context_t *c,
hb_subset_layout_context_t *l) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->start_embed (*this);
if (unlikely (!out || !c->serializer->extend_min (out))) return_trace (false);
unsigned count = this->len;
for (auto _ : + hb_zip (*this, hb_range (count)))
{
auto snap = c->serializer->snapshot ();
l->cur_script_index = _.second;
bool ret = _.first.subset (l, this);
if (!ret) c->serializer->revert (snap);
else out->len++;
}
return_trace (true);
}
};
typedef RecordListOfScript ScriptList;
struct LookupFlag : HBUINT16
{
enum Flags {
RightToLeft = 0x0001u,
IgnoreBaseGlyphs = 0x0002u,
IgnoreLigatures = 0x0004u,
IgnoreMarks = 0x0008u,
IgnoreFlags = 0x000Eu,
UseMarkFilteringSet = 0x0010u,
Reserved = 0x00E0u,
MarkAttachmentType = 0xFF00u
};
public:
DEFINE_SIZE_STATIC (2);
};
} /* namespace OT */
/* This has to be outside the namespace. */
HB_MARK_AS_FLAG_T (OT::LookupFlag::Flags);
namespace OT {
struct Lookup
{
unsigned int get_subtable_count () const { return subTable.len; }
template <typename TSubTable>
const Array16OfOffset16To<TSubTable>& get_subtables () const
{ return reinterpret_cast<const Array16OfOffset16To<TSubTable> &> (subTable); }
template <typename TSubTable>
Array16OfOffset16To<TSubTable>& get_subtables ()
{ return reinterpret_cast<Array16OfOffset16To<TSubTable> &> (subTable); }
template <typename TSubTable>
const TSubTable& get_subtable (unsigned int i) const
{ return this+get_subtables<TSubTable> ()[i]; }
template <typename TSubTable>
TSubTable& get_subtable (unsigned int i)
{ return this+get_subtables<TSubTable> ()[i]; }
unsigned int get_size () const
{
const HBUINT16 &markFilteringSet = StructAfter<const HBUINT16> (subTable);
if (lookupFlag & LookupFlag::UseMarkFilteringSet)
return (const char *) &StructAfter<const char> (markFilteringSet) - (const char *) this;
return (const char *) &markFilteringSet - (const char *) this;
}
unsigned int get_type () 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. */
uint32_t get_props () const
{
unsigned int flag = lookupFlag;
if (unlikely (flag & LookupFlag::UseMarkFilteringSet))
{
const HBUINT16 &markFilteringSet = StructAfter<HBUINT16> (subTable);
flag += (markFilteringSet << 16);
}
return flag;
}
template <typename TSubTable, typename context_t, typename ...Ts>
typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const
{
unsigned int lookup_type = get_type ();
TRACE_DISPATCH (this, lookup_type);
unsigned int count = get_subtable_count ();
for (unsigned int i = 0; i < count; i++) {
typename context_t::return_t r = get_subtable<TSubTable> (i).dispatch (c, lookup_type, std::forward<Ts> (ds)...);
if (c->stop_sublookup_iteration (r))
return_trace (r);
}
return_trace (c->default_return_value ());
}
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 (false);
lookupType = lookup_type;
lookupFlag = lookup_props & 0xFFFFu;
if (unlikely (!subTable.serialize (c, num_subtables))) return_trace (false);
if (lookupFlag & LookupFlag::UseMarkFilteringSet)
{
if (unlikely (!c->extend (this))) return_trace (false);
HBUINT16 &markFilteringSet = StructAfter<HBUINT16> (subTable);
markFilteringSet = lookup_props >> 16;
}
return_trace (true);
}
template <typename TSubTable>
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->start_embed (*this);
if (unlikely (!out || !c->serializer->extend_min (out))) return_trace (false);
out->lookupType = lookupType;
out->lookupFlag = lookupFlag;
const hb_set_t *glyphset = c->plan->glyphset_gsub ();
unsigned int lookup_type = get_type ();
+ hb_iter (get_subtables <TSubTable> ())
| hb_filter ([this, glyphset, lookup_type] (const Offset16To<TSubTable> &_) { return (this+_).intersects (glyphset, lookup_type); })
| hb_apply (subset_offset_array (c, out->get_subtables<TSubTable> (), this, lookup_type))
;
if (lookupFlag & LookupFlag::UseMarkFilteringSet)
{
if (unlikely (!c->serializer->extend (out))) return_trace (false);
const HBUINT16 &markFilteringSet = StructAfter<HBUINT16> (subTable);
HBUINT16 &outMarkFilteringSet = StructAfter<HBUINT16> (out->subTable);
outMarkFilteringSet = markFilteringSet;
}
return_trace (out->subTable.len);
}
template <typename TSubTable>
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
if (!(c->check_struct (this) && subTable.sanitize (c))) return_trace (false);
unsigned subtables = get_subtable_count ();
if (unlikely (!c->visit_subtables (subtables))) return_trace (false);
if (lookupFlag & LookupFlag::UseMarkFilteringSet)
{
const HBUINT16 &markFilteringSet = StructAfter<HBUINT16> (subTable);
if (!markFilteringSet.sanitize (c)) return_trace (false);
}
if (unlikely (!get_subtables<TSubTable> ().sanitize (c, this, get_type ())))
return_trace (false);
if (unlikely (get_type () == TSubTable::Extension && !c->get_edit_count ()))
{
/* The spec says all subtables of an Extension lookup should
* have the same type, which shall not be the Extension type
* itself (but we already checked for that).
* This is specially important if one has a reverse type!
*
* We only do this if sanitizer edit_count is zero. Otherwise,
* some of the subtables might have become insane after they
* were sanity-checked by the edits of subsequent subtables.
* https://bugs.chromium.org/p/chromium/issues/detail?id=960331
*/
unsigned int type = get_subtable<TSubTable> (0).u.extension.get_type ();
for (unsigned int i = 1; i < subtables; i++)
if (get_subtable<TSubTable> (i).u.extension.get_type () != type)
return_trace (false);
}
return_trace (true);
}
protected:
HBUINT16 lookupType; /* Different enumerations for GSUB and GPOS */
HBUINT16 lookupFlag; /* Lookup qualifiers */
Array16Of<Offset16>
subTable; /* Array of SubTables */
/*HBUINT16 markFilteringSetX[HB_VAR_ARRAY];*//* 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_ARRAY (6, subTable);
};
template <typename Types>
using LookupList = List16OfOffsetTo<Lookup, typename Types::HBUINT>;
template <typename TLookup, typename OffsetType>
struct LookupOffsetList : List16OfOffsetTo<TLookup, OffsetType>
{
bool subset (hb_subset_context_t *c,
hb_subset_layout_context_t *l) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->start_embed (this);
if (unlikely (!out || !c->serializer->extend_min (out))) return_trace (false);
unsigned count = this->len;
+ hb_zip (*this, hb_range (count))
| hb_filter (l->lookup_index_map, hb_second)
| hb_map (hb_first)
| hb_apply (subset_offset_array (c, *out, this))
;
return_trace (true);
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (List16OfOffset16To<TLookup>::sanitize (c, this));
}
};
/*
* Coverage Table
*/
static void ClassDef_remap_and_serialize (hb_serialize_context_t *c,
const hb_set_t &klasses,
bool use_class_zero,
hb_sorted_vector_t<hb_pair_t<hb_codepoint_t, hb_codepoint_t>> &glyph_and_klass, /* IN/OUT */
hb_map_t *klass_map /*IN/OUT*/)
{
if (!klass_map)
{
ClassDef_serialize (c, glyph_and_klass.iter ());
return;
}
/* any glyph not assigned a class value falls into Class zero (0),
* if any glyph assigned to class 0, remapping must start with 0->0*/
if (!use_class_zero)
klass_map->set (0, 0);
unsigned idx = klass_map->has (0) ? 1 : 0;
for (const unsigned k: klasses.iter ())
{
if (klass_map->has (k)) continue;
klass_map->set (k, idx);
idx++;
}
for (unsigned i = 0; i < glyph_and_klass.length; i++)
{
hb_codepoint_t klass = glyph_and_klass[i].second;
glyph_and_klass[i].second = klass_map->get (klass);
}
c->propagate_error (glyph_and_klass, klasses);
ClassDef_serialize (c, glyph_and_klass.iter ());
}
/*
* Class Definition Table
*/
template <typename Types>
struct ClassDefFormat1_3
{
friend struct ClassDef;
private:
unsigned int get_class (hb_codepoint_t glyph_id) const
{
return classValue[(unsigned int) (glyph_id - startGlyph)];
}
template<typename Iterator,
hb_requires (hb_is_sorted_source_of (Iterator, hb_codepoint_t))>
bool serialize (hb_serialize_context_t *c,
Iterator it)
{
TRACE_SERIALIZE (this);
if (unlikely (!c->extend_min (this))) return_trace (false);
if (unlikely (!it))
{
classFormat = 1;
startGlyph = 0;
classValue.len = 0;
return_trace (true);
}
hb_codepoint_t glyph_min = (*it).first;
hb_codepoint_t glyph_max = + it
| hb_map (hb_first)
| hb_reduce (hb_max, 0u);
unsigned glyph_count = glyph_max - glyph_min + 1;
startGlyph = glyph_min;
if (unlikely (!classValue.serialize (c, glyph_count))) return_trace (false);
for (const hb_pair_t<hb_codepoint_t, unsigned> gid_klass_pair : + it)
{
unsigned idx = gid_klass_pair.first - glyph_min;
classValue[idx] = gid_klass_pair.second;
}
return_trace (true);
}
bool subset (hb_subset_context_t *c,
hb_map_t *klass_map = nullptr /*OUT*/,
bool keep_empty_table = true,
bool use_class_zero = true,
const Coverage* glyph_filter = nullptr) const
{
TRACE_SUBSET (this);
const hb_map_t &glyph_map = *c->plan->glyph_map_gsub;
hb_sorted_vector_t<hb_pair_t<hb_codepoint_t, hb_codepoint_t>> glyph_and_klass;
hb_set_t orig_klasses;
hb_codepoint_t start = startGlyph;
hb_codepoint_t end = start + classValue.len;
for (const hb_codepoint_t gid : + hb_range (start, end))
{
hb_codepoint_t new_gid = glyph_map[gid];
if (new_gid == HB_MAP_VALUE_INVALID) continue;
if (glyph_filter && !glyph_filter->has(gid)) continue;
unsigned klass = classValue[gid - start];
if (!klass) continue;
glyph_and_klass.push (hb_pair (new_gid, klass));
orig_klasses.add (klass);
}
unsigned glyph_count = glyph_filter
? hb_len (hb_iter (glyph_map.keys()) | hb_filter (glyph_filter))
: glyph_map.get_population ();
use_class_zero = use_class_zero && glyph_count <= glyph_and_klass.length;
ClassDef_remap_and_serialize (c->serializer,
orig_klasses,
use_class_zero,
glyph_and_klass,
klass_map);
return_trace (keep_empty_table || (bool) glyph_and_klass);
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) && classValue.sanitize (c));
}
unsigned cost () const { return 1; }
template <typename set_t>
bool collect_coverage (set_t *glyphs) const
{
unsigned int start = 0;
unsigned int count = classValue.len;
for (unsigned int i = 0; i < count; i++)
{
if (classValue[i])
continue;
if (start != i)
if (unlikely (!glyphs->add_range (startGlyph + start, startGlyph + i)))
return false;
start = i + 1;
}
if (start != count)
if (unlikely (!glyphs->add_range (startGlyph + start, startGlyph + count)))
return false;
return true;
}
template <typename set_t>
bool collect_class (set_t *glyphs, unsigned klass) const
{
unsigned int count = classValue.len;
for (unsigned int i = 0; i < count; i++)
if (classValue[i] == klass) glyphs->add (startGlyph + i);
return true;
}
bool intersects (const hb_set_t *glyphs) const
{
/* TODO Speed up, using hb_set_next()? */
hb_codepoint_t start = startGlyph;
hb_codepoint_t end = startGlyph + classValue.len;
for (hb_codepoint_t iter = startGlyph - 1;
hb_set_next (glyphs, &iter) && iter < end;)
if (classValue[iter - start]) return true;
return false;
}
bool intersects_class (const hb_set_t *glyphs, uint16_t klass) const
{
unsigned int count = classValue.len;
if (klass == 0)
{
/* Match if there's any glyph that is not listed! */
hb_codepoint_t g = HB_SET_VALUE_INVALID;
if (!hb_set_next (glyphs, &g)) return false;
if (g < startGlyph) return true;
g = startGlyph + count - 1;
if (hb_set_next (glyphs, &g)) return true;
/* Fall through. */
}
/* TODO Speed up, using set overlap first? */
/* TODO(iter) Rewrite as dagger. */
const HBUINT16 *arr = classValue.arrayZ;
for (unsigned int i = 0; i < count; i++)
if (arr[i] == klass && glyphs->has (startGlyph + i))
return true;
return false;
}
void intersected_class_glyphs (const hb_set_t *glyphs, unsigned klass, hb_set_t *intersect_glyphs) const
{
unsigned count = classValue.len;
if (klass == 0)
{
unsigned start_glyph = startGlyph;
for (unsigned g = HB_SET_VALUE_INVALID;
hb_set_next (glyphs, &g) && g < start_glyph;)
intersect_glyphs->add (g);
for (unsigned g = startGlyph + count - 1;
hb_set_next (glyphs, &g);)
intersect_glyphs->add (g);
return;
}
for (unsigned i = 0; i < count; i++)
if (classValue[i] == klass && glyphs->has (startGlyph + i))
intersect_glyphs->add (startGlyph + i);
#if 0
/* The following implementation is faster asymptotically, but slower
* in practice. */
unsigned start_glyph = startGlyph;
unsigned end_glyph = start_glyph + count;
for (unsigned g = startGlyph - 1;
hb_set_next (glyphs, &g) && g < end_glyph;)
if (classValue.arrayZ[g - start_glyph] == klass)
intersect_glyphs->add (g);
#endif
}
void intersected_classes (const hb_set_t *glyphs, hb_set_t *intersect_classes) const
{
if (glyphs->is_empty ()) return;
hb_codepoint_t end_glyph = startGlyph + classValue.len - 1;
if (glyphs->get_min () < startGlyph ||
glyphs->get_max () > end_glyph)
intersect_classes->add (0);
for (const auto& _ : + hb_enumerate (classValue))
{
hb_codepoint_t g = startGlyph + _.first;
if (glyphs->has (g))
intersect_classes->add (_.second);
}
}
protected:
HBUINT16 classFormat; /* Format identifier--format = 1 */
typename Types::HBGlyphID
startGlyph; /* First GlyphID of the classValueArray */
typename Types::template ArrayOf<HBUINT16>
classValue; /* Array of Class Values--one per GlyphID */
public:
DEFINE_SIZE_ARRAY (2 + 2 * Types::size, classValue);
};
template <typename Types>
struct ClassDefFormat2_4
{
friend struct ClassDef;
private:
unsigned int get_class (hb_codepoint_t glyph_id) const
{
return rangeRecord.bsearch (glyph_id).value;
}
template<typename Iterator,
hb_requires (hb_is_sorted_source_of (Iterator, hb_codepoint_t))>
bool serialize (hb_serialize_context_t *c,
Iterator it)
{
TRACE_SERIALIZE (this);
if (unlikely (!c->extend_min (this))) return_trace (false);
if (unlikely (!it))
{
classFormat = 2;
rangeRecord.len = 0;
return_trace (true);
}
unsigned num_ranges = 1;
hb_codepoint_t prev_gid = (*it).first;
unsigned prev_klass = (*it).second;
RangeRecord<Types> range_rec;
range_rec.first = prev_gid;
range_rec.last = prev_gid;
range_rec.value = prev_klass;
auto *record = c->copy (range_rec);
if (unlikely (!record)) return_trace (false);
for (const auto gid_klass_pair : + (++it))
{
hb_codepoint_t cur_gid = gid_klass_pair.first;
unsigned cur_klass = gid_klass_pair.second;
if (cur_gid != prev_gid + 1 ||
cur_klass != prev_klass)
{
if (unlikely (!record)) break;
record->last = prev_gid;
num_ranges++;
range_rec.first = cur_gid;
range_rec.last = cur_gid;
range_rec.value = cur_klass;
record = c->copy (range_rec);
}
prev_klass = cur_klass;
prev_gid = cur_gid;
}
if (likely (record)) record->last = prev_gid;
rangeRecord.len = num_ranges;
return_trace (true);
}
bool subset (hb_subset_context_t *c,
hb_map_t *klass_map = nullptr /*OUT*/,
bool keep_empty_table = true,
bool use_class_zero = true,
const Coverage* glyph_filter = nullptr) const
{
TRACE_SUBSET (this);
const hb_map_t &glyph_map = *c->plan->glyph_map_gsub;
hb_sorted_vector_t<hb_pair_t<hb_codepoint_t, hb_codepoint_t>> glyph_and_klass;
hb_set_t orig_klasses;
unsigned num_source_glyphs = c->plan->source->get_num_glyphs ();
unsigned count = rangeRecord.len;
for (unsigned i = 0; i < count; i++)
{
unsigned klass = rangeRecord[i].value;
if (!klass) continue;
hb_codepoint_t start = rangeRecord[i].first;
hb_codepoint_t end = hb_min (rangeRecord[i].last + 1, num_source_glyphs);
for (hb_codepoint_t g = start; g < end; g++)
{
hb_codepoint_t new_gid = glyph_map[g];
if (new_gid == HB_MAP_VALUE_INVALID) continue;
if (glyph_filter && !glyph_filter->has (g)) continue;
glyph_and_klass.push (hb_pair (new_gid, klass));
orig_klasses.add (klass);
}
}
const hb_set_t& glyphset = *c->plan->glyphset_gsub ();
unsigned glyph_count = glyph_filter
? hb_len (hb_iter (glyphset) | hb_filter (glyph_filter))
: glyph_map.get_population ();
use_class_zero = use_class_zero && glyph_count <= glyph_and_klass.length;
ClassDef_remap_and_serialize (c->serializer,
orig_klasses,
use_class_zero,
glyph_and_klass,
klass_map);
return_trace (keep_empty_table || (bool) glyph_and_klass);
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (rangeRecord.sanitize (c));
}
unsigned cost () const { return hb_bit_storage ((unsigned) rangeRecord.len); /* bsearch cost */ }
template <typename set_t>
bool collect_coverage (set_t *glyphs) const
{
unsigned int count = rangeRecord.len;
for (unsigned int i = 0; i < count; i++)
if (rangeRecord[i].value)
if (unlikely (!rangeRecord[i].collect_coverage (glyphs)))
return false;
return true;
}
template <typename set_t>
bool collect_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)
if (unlikely (!rangeRecord[i].collect_coverage (glyphs)))
return false;
}
return true;
}
bool intersects (const hb_set_t *glyphs) const
{
/* TODO Speed up, using hb_set_next() and bsearch()? */
unsigned int count = rangeRecord.len;
for (unsigned int i = 0; i < count; i++)
{
const auto& range = rangeRecord[i];
if (range.intersects (*glyphs) && range.value)
return true;
}
return false;
}
bool intersects_class (const hb_set_t *glyphs, uint16_t klass) const
{
unsigned int count = rangeRecord.len;
if (klass == 0)
{
/* Match if there's any glyph that is not listed! */
hb_codepoint_t g = HB_SET_VALUE_INVALID;
for (unsigned int i = 0; i < count; i++)
{
if (!hb_set_next (glyphs, &g))
break;
if (g < rangeRecord[i].first)
return true;
g = rangeRecord[i].last;
}
if (g != HB_SET_VALUE_INVALID && hb_set_next (glyphs, &g))
return true;
/* Fall through. */
}
for (const auto &range : rangeRecord)
if (range.value == klass && range.intersects (*glyphs))
return true;
return false;
}
void intersected_class_glyphs (const hb_set_t *glyphs, unsigned klass, hb_set_t *intersect_glyphs) const
{
unsigned count = rangeRecord.len;
if (klass == 0)
{
hb_codepoint_t g = HB_SET_VALUE_INVALID;
for (unsigned int i = 0; i < count; i++)
{
if (!hb_set_next (glyphs, &g))
goto done;
while (g < rangeRecord[i].first)
{
intersect_glyphs->add (g);
if (!hb_set_next (glyphs, &g))
goto done;
}
g = rangeRecord[i].last;
}
while (hb_set_next (glyphs, &g))
intersect_glyphs->add (g);
done:
return;
}
#if 0
/* The following implementation is faster asymptotically, but slower
* in practice. */
if ((count >> 3) > glyphs->get_population ())
{
for (hb_codepoint_t g = HB_SET_VALUE_INVALID;
hb_set_next (glyphs, &g);)
if (rangeRecord.as_array ().bfind (g))
intersect_glyphs->add (g);
return;
}
#endif
for (unsigned int i = 0; i < count; i++)
{
if (rangeRecord[i].value != klass) continue;
unsigned end = rangeRecord[i].last + 1;
for (hb_codepoint_t g = rangeRecord[i].first - 1;
hb_set_next (glyphs, &g) && g < end;)
intersect_glyphs->add (g);
}
}
void intersected_classes (const hb_set_t *glyphs, hb_set_t *intersect_classes) const
{
if (glyphs->is_empty ()) return;
unsigned count = rangeRecord.len;
hb_codepoint_t g = HB_SET_VALUE_INVALID;
for (unsigned int i = 0; i < count; i++)
{
if (!hb_set_next (glyphs, &g))
break;
if (g < rangeRecord[i].first)
{
intersect_classes->add (0);
break;
}
g = rangeRecord[i].last;
}
if (g != HB_SET_VALUE_INVALID && hb_set_next (glyphs, &g))
intersect_classes->add (0);
for (const auto& record : rangeRecord.iter ())
if (record.intersects (*glyphs))
intersect_classes->add (record.value);
}
protected:
HBUINT16 classFormat; /* Format identifier--format = 2 */
typename Types::template SortedArrayOf<RangeRecord<Types>>
rangeRecord; /* Array of glyph ranges--ordered by
* Start GlyphID */
public:
DEFINE_SIZE_ARRAY (2 + Types::size, rangeRecord);
};
struct ClassDef
{
/* Has interface. */
static constexpr unsigned SENTINEL = 0;
typedef unsigned int value_t;
value_t operator [] (hb_codepoint_t k) const { return get (k); }
bool has (hb_codepoint_t k) const { return (*this)[k] != SENTINEL; }
/* Projection. */
hb_codepoint_t operator () (hb_codepoint_t k) const { return get (k); }
unsigned int get (hb_codepoint_t k) const { return get_class (k); }
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);
#ifndef HB_NO_BEYOND_64K
case 3: return u.format3.get_class (glyph_id);
case 4: return u.format4.get_class (glyph_id);
#endif
default:return 0;
}
}
template<typename Iterator,
hb_requires (hb_is_sorted_source_of (Iterator, hb_codepoint_t))>
bool serialize (hb_serialize_context_t *c, Iterator it_with_class_zero)
{
TRACE_SERIALIZE (this);
if (unlikely (!c->extend_min (this))) return_trace (false);
auto it = + it_with_class_zero | hb_filter (hb_second);
unsigned format = 2;
hb_codepoint_t glyph_max = 0;
if (likely (it))
{
hb_codepoint_t glyph_min = (*it).first;
glyph_max = glyph_min;
unsigned num_glyphs = 0;
unsigned num_ranges = 1;
hb_codepoint_t prev_gid = glyph_min;
unsigned prev_klass = (*it).second;
for (const auto gid_klass_pair : it)
{
hb_codepoint_t cur_gid = gid_klass_pair.first;
unsigned cur_klass = gid_klass_pair.second;
num_glyphs++;
if (cur_gid == glyph_min) continue;
if (cur_gid > glyph_max) glyph_max = cur_gid;
if (cur_gid != prev_gid + 1 ||
cur_klass != prev_klass)
num_ranges++;
prev_gid = cur_gid;
prev_klass = cur_klass;
}
if (num_glyphs && 1 + (glyph_max - glyph_min + 1) <= num_ranges * 3)
format = 1;
}
#ifndef HB_NO_BEYOND_64K
if (glyph_max > 0xFFFFu)
format += 2;
#endif
u.format = format;
switch (u.format)
{
case 1: return_trace (u.format1.serialize (c, it));
case 2: return_trace (u.format2.serialize (c, it));
#ifndef HB_NO_BEYOND_64K
case 3: return_trace (u.format3.serialize (c, it));
case 4: return_trace (u.format4.serialize (c, it));
#endif
default:return_trace (false);
}
}
bool subset (hb_subset_context_t *c,
hb_map_t *klass_map = nullptr /*OUT*/,
bool keep_empty_table = true,
bool use_class_zero = true,
const Coverage* glyph_filter = nullptr) const
{
TRACE_SUBSET (this);
switch (u.format) {
case 1: return_trace (u.format1.subset (c, klass_map, keep_empty_table, use_class_zero, glyph_filter));
case 2: return_trace (u.format2.subset (c, klass_map, keep_empty_table, use_class_zero, glyph_filter));
#ifndef HB_NO_BEYOND_64K
case 3: return_trace (u.format3.subset (c, klass_map, keep_empty_table, use_class_zero, glyph_filter));
case 4: return_trace (u.format4.subset (c, klass_map, keep_empty_table, use_class_zero, glyph_filter));
#endif
default:return_trace (false);
}
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
if (!u.format.sanitize (c)) return_trace (false);
switch (u.format) {
case 1: return_trace (u.format1.sanitize (c));
case 2: return_trace (u.format2.sanitize (c));
#ifndef HB_NO_BEYOND_64K
case 3: return_trace (u.format3.sanitize (c));
case 4: return_trace (u.format4.sanitize (c));
#endif
default:return_trace (true);
}
}
unsigned cost () const
{
switch (u.format) {
case 1: return u.format1.cost ();
case 2: return u.format2.cost ();
#ifndef HB_NO_BEYOND_64K
case 3: return u.format3.cost ();
case 4: return u.format4.cost ();
#endif
default:return 0u;
}
}
/* Might return false if array looks unsorted.
* Used for faster rejection of corrupt data. */
template <typename set_t>
bool collect_coverage (set_t *glyphs) const
{
switch (u.format) {
case 1: return u.format1.collect_coverage (glyphs);
case 2: return u.format2.collect_coverage (glyphs);
#ifndef HB_NO_BEYOND_64K
case 3: return u.format3.collect_coverage (glyphs);
case 4: return u.format4.collect_coverage (glyphs);
#endif
default:return false;
}
}
/* Might return false if array looks unsorted.
* Used for faster rejection of corrupt data. */
template <typename set_t>
bool collect_class (set_t *glyphs, unsigned int klass) const
{
switch (u.format) {
case 1: return u.format1.collect_class (glyphs, klass);
case 2: return u.format2.collect_class (glyphs, klass);
#ifndef HB_NO_BEYOND_64K
case 3: return u.format3.collect_class (glyphs, klass);
case 4: return u.format4.collect_class (glyphs, klass);
#endif
default:return false;
}
}
bool intersects (const hb_set_t *glyphs) const
{
switch (u.format) {
case 1: return u.format1.intersects (glyphs);
case 2: return u.format2.intersects (glyphs);
#ifndef HB_NO_BEYOND_64K
case 3: return u.format3.intersects (glyphs);
case 4: return u.format4.intersects (glyphs);
#endif
default:return false;
}
}
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);
#ifndef HB_NO_BEYOND_64K
case 3: return u.format3.intersects_class (glyphs, klass);
case 4: return u.format4.intersects_class (glyphs, klass);
#endif
default:return false;
}
}
void intersected_class_glyphs (const hb_set_t *glyphs, unsigned klass, hb_set_t *intersect_glyphs) const
{
switch (u.format) {
case 1: return u.format1.intersected_class_glyphs (glyphs, klass, intersect_glyphs);
case 2: return u.format2.intersected_class_glyphs (glyphs, klass, intersect_glyphs);
#ifndef HB_NO_BEYOND_64K
case 3: return u.format3.intersected_class_glyphs (glyphs, klass, intersect_glyphs);
case 4: return u.format4.intersected_class_glyphs (glyphs, klass, intersect_glyphs);
#endif
default:return;
}
}
void intersected_classes (const hb_set_t *glyphs, hb_set_t *intersect_classes) const
{
switch (u.format) {
case 1: return u.format1.intersected_classes (glyphs, intersect_classes);
case 2: return u.format2.intersected_classes (glyphs, intersect_classes);
#ifndef HB_NO_BEYOND_64K
case 3: return u.format3.intersected_classes (glyphs, intersect_classes);
case 4: return u.format4.intersected_classes (glyphs, intersect_classes);
#endif
default:return;
}
}
protected:
union {
HBUINT16 format; /* Format identifier */
ClassDefFormat1_3<SmallTypes> format1;
ClassDefFormat2_4<SmallTypes> format2;
#ifndef HB_NO_BEYOND_64K
ClassDefFormat1_3<MediumTypes>format3;
ClassDefFormat2_4<MediumTypes>format4;
#endif
} u;
public:
DEFINE_SIZE_UNION (2, format);
};
template<typename Iterator>
static inline void ClassDef_serialize (hb_serialize_context_t *c,
Iterator it)
{ c->start_embed<ClassDef> ()->serialize (c, it); }
/*
* Item Variation Store
*/
struct VarRegionAxis
{
float evaluate (int coord) const
{
int start = startCoord, peak = peakCoord, end = endCoord;
/* TODO Move these to sanitize(). */
if (unlikely (start > peak || peak > end))
return 1.;
if (unlikely (start < 0 && end > 0 && peak != 0))
return 1.;
if (peak == 0 || coord == peak)
return 1.;
if (coord <= start || end <= coord)
return 0.;
/* Interpolate */
if (coord < peak)
return float (coord - start) / (peak - start);
else
return float (end - coord) / (end - peak);
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
/* TODO Handle invalid start/peak/end configs, so we don't
* have to do that at runtime. */
}
public:
F2DOT14 startCoord;
F2DOT14 peakCoord;
F2DOT14 endCoord;
public:
DEFINE_SIZE_STATIC (6);
};
#define REGION_CACHE_ITEM_CACHE_INVALID 2.f
struct VarRegionList
{
using cache_t = float;
float evaluate (unsigned int region_index,
const int *coords, unsigned int coord_len,
cache_t *cache = nullptr) const
{
if (unlikely (region_index >= regionCount))
return 0.;
float *cached_value = nullptr;
if (cache)
{
cached_value = &(cache[region_index]);
if (likely (*cached_value != REGION_CACHE_ITEM_CACHE_INVALID))
return *cached_value;
}
const VarRegionAxis *axes = axesZ.arrayZ + (region_index * axisCount);
float v = 1.;
unsigned int count = axisCount;
for (unsigned int i = 0; i < count; i++)
{
int coord = i < coord_len ? coords[i] : 0;
float factor = axes[i].evaluate (coord);
if (factor == 0.f)
{
if (cache)
*cached_value = 0.;
return 0.;
}
v *= factor;
}
if (cache)
*cached_value = v;
return v;
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) && axesZ.sanitize (c, axisCount * regionCount));
}
bool serialize (hb_serialize_context_t *c, const VarRegionList *src, const hb_bimap_t &region_map)
{
TRACE_SERIALIZE (this);
if (unlikely (!c->extend_min (this))) return_trace (false);
axisCount = src->axisCount;
regionCount = region_map.get_population ();
if (unlikely (hb_unsigned_mul_overflows (axisCount * regionCount,
VarRegionAxis::static_size))) return_trace (false);
if (unlikely (!c->extend (this))) return_trace (false);
unsigned int region_count = src->regionCount;
for (unsigned int r = 0; r < regionCount; r++)
{
unsigned int backward = region_map.backward (r);
if (backward >= region_count) return_trace (false);
memcpy (&axesZ[axisCount * r], &src->axesZ[axisCount * backward], VarRegionAxis::static_size * axisCount);
}
return_trace (true);
}
unsigned int get_size () const { return min_size + VarRegionAxis::static_size * axisCount * regionCount; }
public:
HBUINT16 axisCount;
HBUINT15 regionCount;
protected:
UnsizedArrayOf<VarRegionAxis>
axesZ;
public:
DEFINE_SIZE_ARRAY (4, axesZ);
};
struct VarData
{
unsigned int get_region_index_count () const
{ return regionIndices.len; }
unsigned int get_row_size () const
{ return (wordCount () + regionIndices.len) * (longWords () ? 2 : 1); }
unsigned int get_size () const
{ return min_size
- regionIndices.min_size + regionIndices.get_size ()
+ itemCount * get_row_size ();
}
float get_delta (unsigned int inner,
const int *coords, unsigned int coord_count,
const VarRegionList &regions,
VarRegionList::cache_t *cache = nullptr) const
{
if (unlikely (inner >= itemCount))
return 0.;
unsigned int count = regionIndices.len;
bool is_long = longWords ();
unsigned word_count = wordCount ();
unsigned int scount = is_long ? count - word_count : word_count;
unsigned int lcount = is_long ? word_count : 0;
const HBUINT8 *bytes = get_delta_bytes ();
const HBUINT8 *row = bytes + inner * (scount + count);
float delta = 0.;
unsigned int i = 0;
const HBINT16 *lcursor = reinterpret_cast<const HBINT16 *> (row);
for (; i < lcount; i++)
{
float scalar = regions.evaluate (regionIndices.arrayZ[i], coords, coord_count, cache);
delta += scalar * *lcursor++;
}
const HBINT16 *scursor = reinterpret_cast<const HBINT16 *> (lcursor);
for (; i < scount; i++)
{
float scalar = regions.evaluate (regionIndices.arrayZ[i], coords, coord_count, cache);
delta += scalar * *scursor++;
}
const HBINT8 *bcursor = reinterpret_cast<const HBINT8 *> (scursor);
for (; i < count; i++)
{
float scalar = regions.evaluate (regionIndices.arrayZ[i], coords, coord_count, cache);
delta += scalar * *bcursor++;
}
return delta;
}
void get_region_scalars (const int *coords, unsigned int coord_count,
const VarRegionList &regions,
float *scalars /*OUT */,
unsigned int num_scalars) const
{
unsigned count = hb_min (num_scalars, regionIndices.len);
for (unsigned int i = 0; i < count; i++)
scalars[i] = regions.evaluate (regionIndices.arrayZ[i], coords, coord_count);
for (unsigned int i = count; i < num_scalars; i++)
scalars[i] = 0.f;
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) &&
regionIndices.sanitize (c) &&
wordCount () <= regionIndices.len &&
c->check_range (get_delta_bytes (),
itemCount,
get_row_size ()));
}
bool serialize (hb_serialize_context_t *c,
const VarData *src,
const hb_inc_bimap_t &inner_map,
const hb_bimap_t &region_map)
{
TRACE_SERIALIZE (this);
if (unlikely (!c->extend_min (this))) return_trace (false);
itemCount = inner_map.get_next_value ();
/* Optimize word count */
unsigned ri_count = src->regionIndices.len;
enum delta_size_t { kZero=0, kNonWord, kWord };
hb_vector_t<delta_size_t> delta_sz;
hb_vector_t<unsigned int> ri_map; /* maps old index to new index */
delta_sz.resize (ri_count);
ri_map.resize (ri_count);
unsigned int new_word_count = 0;
unsigned int r;
bool has_long = false;
if (src->longWords ())
{
for (r = 0; r < ri_count; r++)
{
for (unsigned int i = 0; i < inner_map.get_next_value (); i++)
{
unsigned int old = inner_map.backward (i);
int32_t delta = src->get_item_delta (old, r);
if (delta < -65536 || 65535 < delta)
{
has_long = true;
break;
}
}
}
}
signed min_threshold = has_long ? -65536 : -128;
signed max_threshold = has_long ? +65535 : +127;
for (r = 0; r < ri_count; r++)
{
delta_sz[r] = kZero;
for (unsigned int i = 0; i < inner_map.get_next_value (); i++)
{
unsigned int old = inner_map.backward (i);
int32_t delta = src->get_item_delta (old, r);
if (delta < min_threshold || max_threshold < delta)
{
delta_sz[r] = kWord;
new_word_count++;
break;
}
else if (delta != 0)
delta_sz[r] = kNonWord;
}
}
unsigned int word_index = 0;
unsigned int non_word_index = new_word_count;
unsigned int new_ri_count = 0;
for (r = 0; r < ri_count; r++)
if (delta_sz[r])
{
ri_map[r] = (delta_sz[r] == kWord)? word_index++ : non_word_index++;
new_ri_count++;
}
wordSizeCount = new_word_count | (has_long ? 0x8000u /* LONG_WORDS */ : 0);
regionIndices.len = new_ri_count;
if (unlikely (!c->extend (this))) return_trace (false);
for (r = 0; r < ri_count; r++)
if (delta_sz[r]) regionIndices[ri_map[r]] = region_map[src->regionIndices[r]];
for (unsigned int i = 0; i < itemCount; i++)
{
unsigned int old = inner_map.backward (i);
for (unsigned int r = 0; r < ri_count; r++)
if (delta_sz[r]) set_item_delta (i, ri_map[r], src->get_item_delta (old, r));
}
return_trace (true);
}
void collect_region_refs (hb_set_t &region_indices, const hb_inc_bimap_t &inner_map) const
{
for (unsigned int r = 0; r < regionIndices.len; r++)
{
unsigned int region = regionIndices[r];
if (region_indices.has (region)) continue;
for (unsigned int i = 0; i < inner_map.get_next_value (); i++)
if (get_item_delta (inner_map.backward (i), r) != 0)
{
region_indices.add (region);
break;
}
}
}
protected:
const HBUINT8 *get_delta_bytes () const
{ return &StructAfter<HBUINT8> (regionIndices); }
HBUINT8 *get_delta_bytes ()
{ return &StructAfter<HBUINT8> (regionIndices); }
int32_t get_item_delta (unsigned int item, unsigned int region) const
{
if ( item >= itemCount || unlikely (region >= regionIndices.len)) return 0;
const HBINT8 *p = (const HBINT8 *) get_delta_bytes () + item * get_row_size ();
unsigned word_count = wordCount ();
bool is_long = longWords ();
if (is_long)
{
if (region < word_count)
return ((const HBINT32 *) p)[region];
else
return ((const HBINT16 *)(p + HBINT32::static_size * word_count))[region - word_count];
}
else
{
if (region < word_count)
return ((const HBINT16 *) p)[region];
else
return (p + HBINT16::static_size * word_count)[region - word_count];
}
}
void set_item_delta (unsigned int item, unsigned int region, int32_t delta)
{
HBINT8 *p = (HBINT8 *)get_delta_bytes () + item * get_row_size ();
unsigned word_count = wordCount ();
bool is_long = longWords ();
if (is_long)
{
if (region < word_count)
((HBINT32 *) p)[region] = delta;
else
((HBINT16 *)(p + HBINT32::static_size * word_count))[region - word_count] = delta;
}
else
{
if (region < word_count)
((HBINT16 *) p)[region] = delta;
else
(p + HBINT16::static_size * word_count)[region - word_count] = delta;
}
}
bool longWords () const { return wordSizeCount & 0x8000u /* LONG_WORDS */; }
unsigned wordCount () const { return wordSizeCount & 0x7FFFu /* WORD_DELTA_COUNT_MASK */; }
protected:
HBUINT16 itemCount;
HBUINT16 wordSizeCount;
Array16Of<HBUINT16> regionIndices;
/*UnsizedArrayOf<HBUINT8>bytesX;*/
public:
DEFINE_SIZE_ARRAY (6, regionIndices);
};
struct VariationStore
{
using cache_t = VarRegionList::cache_t;
cache_t *create_cache () const
{
#ifdef HB_NO_VAR
return nullptr;
#endif
auto &r = this+regions;
unsigned count = r.regionCount;
float *cache = (float *) hb_malloc (sizeof (float) * count);
if (unlikely (!cache)) return nullptr;
for (unsigned i = 0; i < count; i++)
cache[i] = REGION_CACHE_ITEM_CACHE_INVALID;
return cache;
}
static void destroy_cache (cache_t *cache) { hb_free (cache); }
private:
float get_delta (unsigned int outer, unsigned int inner,
const int *coords, unsigned int coord_count,
VarRegionList::cache_t *cache = nullptr) const
{
#ifdef HB_NO_VAR
return 0.f;
#endif
if (unlikely (outer >= dataSets.len))
return 0.f;
return (this+dataSets[outer]).get_delta (inner,
coords, coord_count,
this+regions,
cache);
}
public:
float get_delta (unsigned int index,
const int *coords, unsigned int coord_count,
VarRegionList::cache_t *cache = nullptr) const
{
unsigned int outer = index >> 16;
unsigned int inner = index & 0xFFFF;
return get_delta (outer, inner, coords, coord_count, cache);
}
bool sanitize (hb_sanitize_context_t *c) const
{
#ifdef HB_NO_VAR
return true;
#endif
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) &&
format == 1 &&
regions.sanitize (c, this) &&
dataSets.sanitize (c, this));
}
bool serialize (hb_serialize_context_t *c,
const VariationStore *src,
const hb_array_t <hb_inc_bimap_t> &inner_maps)
{
TRACE_SERIALIZE (this);
#ifdef HB_NO_VAR
return_trace (false);
#endif
if (unlikely (!c->extend_min (this))) return_trace (false);
unsigned int set_count = 0;
for (unsigned int i = 0; i < inner_maps.length; i++)
if (inner_maps[i].get_population ())
set_count++;
format = 1;
const auto &src_regions = src+src->regions;
hb_set_t region_indices;
for (unsigned int i = 0; i < inner_maps.length; i++)
(src+src->dataSets[i]).collect_region_refs (region_indices, inner_maps[i]);
if (region_indices.in_error ())
return_trace (false);
region_indices.del_range ((src_regions).regionCount, hb_set_t::INVALID);
/* TODO use constructor when our data-structures support that. */
hb_inc_bimap_t region_map;
+ hb_iter (region_indices)
| hb_apply ([&region_map] (unsigned _) { region_map.add(_); })
;
if (region_map.in_error())
return_trace (false);
if (unlikely (!regions.serialize_serialize (c, &src_regions, region_map)))
return_trace (false);
dataSets.len = set_count;
if (unlikely (!c->extend (dataSets))) return_trace (false);
/* TODO: The following code could be simplified when
* List16OfOffset16To::subset () can take a custom param to be passed to VarData::serialize () */
unsigned int set_index = 0;
for (unsigned int i = 0; i < inner_maps.length; i++)
{
if (!inner_maps[i].get_population ()) continue;
if (unlikely (!dataSets[set_index++]
.serialize_serialize (c, &(src+src->dataSets[i]), inner_maps[i], region_map)))
return_trace (false);
}
return_trace (true);
}
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
#ifdef HB_NO_VAR
return_trace (false);
#endif
VariationStore *varstore_prime = c->serializer->start_embed<VariationStore> ();
if (unlikely (!varstore_prime)) return_trace (false);
const hb_set_t *variation_indices = c->plan->layout_variation_indices;
if (variation_indices->is_empty ()) return_trace (false);
hb_vector_t<hb_inc_bimap_t> inner_maps;
inner_maps.resize ((unsigned) dataSets.len);
for (unsigned idx : c->plan->layout_variation_indices->iter ())
{
uint16_t major = idx >> 16;
uint16_t minor = idx & 0xFFFF;
if (major >= inner_maps.length)
return_trace (false);
inner_maps[major].add (minor);
}
varstore_prime->serialize (c->serializer, this, inner_maps.as_array ());
return_trace (
!c->serializer->in_error()
&& varstore_prime->dataSets);
}
unsigned int get_region_index_count (unsigned int major) const
{
#ifdef HB_NO_VAR
return 0;
#endif
return (this+dataSets[major]).get_region_index_count ();
}
void get_region_scalars (unsigned int major,
const int *coords, unsigned int coord_count,
float *scalars /*OUT*/,
unsigned int num_scalars) const
{
#ifdef HB_NO_VAR
for (unsigned i = 0; i < num_scalars; i++)
scalars[i] = 0.f;
return;
#endif
(this+dataSets[major]).get_region_scalars (coords, coord_count,
this+regions,
&scalars[0], num_scalars);
}
unsigned int get_sub_table_count () const
{
#ifdef HB_NO_VAR
return 0;
#endif
return dataSets.len;
}
protected:
HBUINT16 format;
Offset32To<VarRegionList> regions;
Array16OfOffset32To<VarData> dataSets;
public:
DEFINE_SIZE_ARRAY_SIZED (8, dataSets);
};
#undef REGION_CACHE_ITEM_CACHE_INVALID
/*
* Feature Variations
*/
struct ConditionFormat1
{
friend struct Condition;
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->embed (this);
if (unlikely (!out)) return_trace (false);
return_trace (true);
}
private:
bool evaluate (const int *coords, unsigned int coord_len) const
{
int coord = axisIndex < coord_len ? coords[axisIndex] : 0;
return filterRangeMinValue <= coord && coord <= filterRangeMaxValue;
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
protected:
HBUINT16 format; /* Format identifier--format = 1 */
HBUINT16 axisIndex;
F2DOT14 filterRangeMinValue;
F2DOT14 filterRangeMaxValue;
public:
DEFINE_SIZE_STATIC (8);
};
struct Condition
{
bool evaluate (const int *coords, unsigned int coord_len) const
{
switch (u.format) {
case 1: return u.format1.evaluate (coords, coord_len);
default:return false;
}
}
template <typename context_t, typename ...Ts>
typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const
{
TRACE_DISPATCH (this, u.format);
if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ());
switch (u.format) {
case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...));
default:return_trace (c->default_return_value ());
}
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
if (!u.format.sanitize (c)) return_trace (false);
switch (u.format) {
case 1: return_trace (u.format1.sanitize (c));
default:return_trace (true);
}
}
protected:
union {
HBUINT16 format; /* Format identifier */
ConditionFormat1 format1;
} u;
public:
DEFINE_SIZE_UNION (2, format);
};
struct ConditionSet
{
bool evaluate (const int *coords, unsigned int coord_len) const
{
unsigned int count = conditions.len;
for (unsigned int i = 0; i < count; i++)
if (!(this+conditions.arrayZ[i]).evaluate (coords, coord_len))
return false;
return true;
}
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->start_embed (this);
if (unlikely (!out || !c->serializer->extend_min (out))) return_trace (false);
+ conditions.iter ()
| hb_apply (subset_offset_array (c, out->conditions, this))
;
return_trace (bool (out->conditions));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (conditions.sanitize (c, this));
}
protected:
Array16OfOffset32To<Condition> conditions;
public:
DEFINE_SIZE_ARRAY (2, conditions);
};
struct FeatureTableSubstitutionRecord
{
friend struct FeatureTableSubstitution;
void collect_lookups (const void *base, hb_set_t *lookup_indexes /* OUT */) const
{
return (base+feature).add_lookup_indexes_to (lookup_indexes);
}
void closure_features (const void *base,
const hb_map_t *lookup_indexes,
hb_set_t *feature_indexes /* OUT */) const
{
if ((base+feature).intersects_lookup_indexes (lookup_indexes))
feature_indexes->add (featureIndex);
}
bool subset (hb_subset_layout_context_t *c, const void *base) const
{
TRACE_SUBSET (this);
if (!c->feature_index_map->has (featureIndex)) {
// Feature that is being substituted is not being retained, so we don't
// need this.
return_trace (false);
}
auto *out = c->subset_context->serializer->embed (this);
if (unlikely (!out)) return_trace (false);
out->featureIndex = c->feature_index_map->get (featureIndex);
bool ret = out->feature.serialize_subset (c->subset_context, feature, base, c);
return_trace (ret);
}
bool sanitize (hb_sanitize_context_t *c, const void *base) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) && feature.sanitize (c, base));
}
protected:
HBUINT16 featureIndex;
Offset32To<Feature> feature;
public:
DEFINE_SIZE_STATIC (6);
};
struct FeatureTableSubstitution
{
const Feature *find_substitute (unsigned int feature_index) const
{
unsigned int count = substitutions.len;
for (unsigned int i = 0; i < count; i++)
{
const FeatureTableSubstitutionRecord &record = substitutions.arrayZ[i];
if (record.featureIndex == feature_index)
return &(this+record.feature);
}
return nullptr;
}
void collect_lookups (const hb_set_t *feature_indexes,
hb_set_t *lookup_indexes /* OUT */) const
{
+ hb_iter (substitutions)
| hb_filter (feature_indexes, &FeatureTableSubstitutionRecord::featureIndex)
| hb_apply ([this, lookup_indexes] (const FeatureTableSubstitutionRecord& r)
{ r.collect_lookups (this, lookup_indexes); })
;
}
void closure_features (const hb_map_t *lookup_indexes,
hb_set_t *feature_indexes /* OUT */) const
{
for (const FeatureTableSubstitutionRecord& record : substitutions)
record.closure_features (this, lookup_indexes, feature_indexes);
}
bool intersects_features (const hb_map_t *feature_index_map) const
{
for (const FeatureTableSubstitutionRecord& record : substitutions)
{
if (feature_index_map->has (record.featureIndex)) return true;
}
return false;
}
bool subset (hb_subset_context_t *c,
hb_subset_layout_context_t *l) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->start_embed (*this);
if (unlikely (!out || !c->serializer->extend_min (out))) return_trace (false);
out->version.major = version.major;
out->version.minor = version.minor;
+ substitutions.iter ()
| hb_apply (subset_record_array (l, &(out->substitutions), this))
;
return_trace (bool (out->substitutions));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (version.sanitize (c) &&
likely (version.major == 1) &&
substitutions.sanitize (c, this));
}
protected:
FixedVersion<> version; /* Version--0x00010000u */
Array16Of<FeatureTableSubstitutionRecord>
substitutions;
public:
DEFINE_SIZE_ARRAY (6, substitutions);
};
struct FeatureVariationRecord
{
friend struct FeatureVariations;
void collect_lookups (const void *base,
const hb_set_t *feature_indexes,
hb_set_t *lookup_indexes /* OUT */) const
{
return (base+substitutions).collect_lookups (feature_indexes, lookup_indexes);
}
void closure_features (const void *base,
const hb_map_t *lookup_indexes,
hb_set_t *feature_indexes /* OUT */) const
{
(base+substitutions).closure_features (lookup_indexes, feature_indexes);
}
bool intersects_features (const void *base, const hb_map_t *feature_index_map) const
{
return (base+substitutions).intersects_features (feature_index_map);
}
bool subset (hb_subset_layout_context_t *c, const void *base) const
{
TRACE_SUBSET (this);
auto *out = c->subset_context->serializer->embed (this);
if (unlikely (!out)) return_trace (false);
out->conditions.serialize_subset (c->subset_context, conditions, base);
out->substitutions.serialize_subset (c->subset_context, substitutions, base, c);
return_trace (true);
}
bool sanitize (hb_sanitize_context_t *c, const void *base) const
{
TRACE_SANITIZE (this);
return_trace (conditions.sanitize (c, base) &&
substitutions.sanitize (c, base));
}
protected:
Offset32To<ConditionSet>
conditions;
Offset32To<FeatureTableSubstitution>
substitutions;
public:
DEFINE_SIZE_STATIC (8);
};
struct FeatureVariations
{
static constexpr unsigned NOT_FOUND_INDEX = 0xFFFFFFFFu;
bool find_index (const int *coords, unsigned int coord_len,
unsigned int *index) const
{
unsigned int count = varRecords.len;
for (unsigned int i = 0; i < count; i++)
{
const FeatureVariationRecord &record = varRecords.arrayZ[i];
if ((this+record.conditions).evaluate (coords, coord_len))
{
*index = i;
return true;
}
}
*index = NOT_FOUND_INDEX;
return false;
}
const Feature *find_substitute (unsigned int variations_index,
unsigned int feature_index) const
{
const FeatureVariationRecord &record = varRecords[variations_index];
return (this+record.substitutions).find_substitute (feature_index);
}
FeatureVariations* copy (hb_serialize_context_t *c) const
{
TRACE_SERIALIZE (this);
return_trace (c->embed (*this));
}
void collect_lookups (const hb_set_t *feature_indexes,
hb_set_t *lookup_indexes /* OUT */) const
{
for (const FeatureVariationRecord& r : varRecords)
r.collect_lookups (this, feature_indexes, lookup_indexes);
}
void closure_features (const hb_map_t *lookup_indexes,
hb_set_t *feature_indexes /* OUT */) const
{
for (const FeatureVariationRecord& record : varRecords)
record.closure_features (this, lookup_indexes, feature_indexes);
}
bool subset (hb_subset_context_t *c,
hb_subset_layout_context_t *l) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->start_embed (*this);
if (unlikely (!out || !c->serializer->extend_min (out))) return_trace (false);
out->version.major = version.major;
out->version.minor = version.minor;
int keep_up_to = -1;
for (int i = varRecords.len - 1; i >= 0; i--) {
if (varRecords[i].intersects_features (this, l->feature_index_map)) {
keep_up_to = i;
break;
}
}
unsigned count = (unsigned) (keep_up_to + 1);
for (unsigned i = 0; i < count; i++) {
subset_record_array (l, &(out->varRecords), this) (varRecords[i]);
}
return_trace (bool (out->varRecords));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (version.sanitize (c) &&
likely (version.major == 1) &&
varRecords.sanitize (c, this));
}
protected:
FixedVersion<> version; /* Version--0x00010000u */
Array32Of<FeatureVariationRecord>
varRecords;
public:
DEFINE_SIZE_ARRAY_SIZED (8, varRecords);
};
/*
* Device Tables
*/
struct HintingDevice
{
friend struct Device;
private:
hb_position_t get_x_delta (hb_font_t *font) const
{ return get_delta (font->x_ppem, font->x_scale); }
hb_position_t get_y_delta (hb_font_t *font) const
{ return get_delta (font->y_ppem, font->y_scale); }
public:
unsigned int get_size () const
{
unsigned int f = deltaFormat;
if (unlikely (f < 1 || f > 3 || startSize > endSize)) return 3 * HBUINT16::static_size;
return HBUINT16::static_size * (4 + ((endSize - startSize) >> (4 - f)));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) && c->check_range (this, this->get_size ()));
}
HintingDevice* copy (hb_serialize_context_t *c) const
{
TRACE_SERIALIZE (this);
return_trace (c->embed<HintingDevice> (this));
}
private:
int get_delta (unsigned int ppem, int scale) const
{
if (!ppem) return 0;
int pixels = get_delta_pixels (ppem);
if (!pixels) return 0;
return (int) (pixels * (int64_t) scale / ppem);
}
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 = deltaValueZ[s >> (4 - f)];
unsigned int bits = (byte >> (16 - (((s & ((1 << (4 - f)) - 1)) + 1) << f)));
unsigned int mask = (0xFFFFu >> (16 - (1 << f)));
int delta = bits & mask;
if ((unsigned int) delta >= ((mask + 1) >> 1))
delta -= mask + 1;
return delta;
}
protected:
HBUINT16 startSize; /* Smallest size to correct--in ppem */
HBUINT16 endSize; /* Largest size to correct--in ppem */
HBUINT16 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
*/
UnsizedArrayOf<HBUINT16>
deltaValueZ; /* Array of compressed data */
public:
DEFINE_SIZE_ARRAY (6, deltaValueZ);
};
struct VariationDevice
{
friend struct Device;
private:
hb_position_t get_x_delta (hb_font_t *font,
const VariationStore &store,
VariationStore::cache_t *store_cache = nullptr) const
{ return font->em_scalef_x (get_delta (font, store, store_cache)); }
hb_position_t get_y_delta (hb_font_t *font,
const VariationStore &store,
VariationStore::cache_t *store_cache = nullptr) const
{ return font->em_scalef_y (get_delta (font, store, store_cache)); }
VariationDevice* copy (hb_serialize_context_t *c, const hb_map_t *layout_variation_idx_map) const
{
TRACE_SERIALIZE (this);
auto snap = c->snapshot ();
auto *out = c->embed (this);
if (unlikely (!out)) return_trace (nullptr);
if (!layout_variation_idx_map || layout_variation_idx_map->is_empty ()) return_trace (out);
/* TODO Just get() and bail if NO_VARIATION. Needs to setup the map to return that. */
if (!layout_variation_idx_map->has (varIdx))
{
c->revert (snap);
return_trace (nullptr);
}
unsigned new_idx = layout_variation_idx_map->get (varIdx);
out->varIdx = new_idx;
return_trace (out);
}
void record_variation_index (hb_set_t *layout_variation_indices) const
{
layout_variation_indices->add (varIdx);
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
private:
float get_delta (hb_font_t *font,
const VariationStore &store,
VariationStore::cache_t *store_cache = nullptr) const
{
return store.get_delta (varIdx, font->coords, font->num_coords, (VariationStore::cache_t *) store_cache);
}
protected:
VarIdx varIdx;
HBUINT16 deltaFormat; /* Format identifier for this table: 0x0x8000 */
public:
DEFINE_SIZE_STATIC (6);
};
struct DeviceHeader
{
protected:
HBUINT16 reserved1;
HBUINT16 reserved2;
public:
HBUINT16 format; /* Format identifier */
public:
DEFINE_SIZE_STATIC (6);
};
struct Device
{
hb_position_t get_x_delta (hb_font_t *font,
const VariationStore &store=Null (VariationStore),
VariationStore::cache_t *store_cache = nullptr) const
{
switch (u.b.format)
{
#ifndef HB_NO_HINTING
case 1: case 2: case 3:
return u.hinting.get_x_delta (font);
#endif
#ifndef HB_NO_VAR
case 0x8000:
return u.variation.get_x_delta (font, store, store_cache);
#endif
default:
return 0;
}
}
hb_position_t get_y_delta (hb_font_t *font,
const VariationStore &store=Null (VariationStore),
VariationStore::cache_t *store_cache = nullptr) const
{
switch (u.b.format)
{
case 1: case 2: case 3:
#ifndef HB_NO_HINTING
return u.hinting.get_y_delta (font);
#endif
#ifndef HB_NO_VAR
case 0x8000:
return u.variation.get_y_delta (font, store, store_cache);
#endif
default:
return 0;
}
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
if (!u.b.format.sanitize (c)) return_trace (false);
switch (u.b.format) {
#ifndef HB_NO_HINTING
case 1: case 2: case 3:
return_trace (u.hinting.sanitize (c));
#endif
#ifndef HB_NO_VAR
case 0x8000:
return_trace (u.variation.sanitize (c));
#endif
default:
return_trace (true);
}
}
Device* copy (hb_serialize_context_t *c, const hb_map_t *layout_variation_idx_map=nullptr) const
{
TRACE_SERIALIZE (this);
switch (u.b.format) {
#ifndef HB_NO_HINTING
case 1:
case 2:
case 3:
return_trace (reinterpret_cast<Device *> (u.hinting.copy (c)));
#endif
#ifndef HB_NO_VAR
case 0x8000:
return_trace (reinterpret_cast<Device *> (u.variation.copy (c, layout_variation_idx_map)));
#endif
default:
return_trace (nullptr);
}
}
void collect_variation_indices (hb_set_t *layout_variation_indices) const
{
switch (u.b.format) {
#ifndef HB_NO_HINTING
case 1:
case 2:
case 3:
return;
#endif
#ifndef HB_NO_VAR
case 0x8000:
u.variation.record_variation_index (layout_variation_indices);
return;
#endif
default:
return;
}
}
protected:
union {
DeviceHeader b;
HintingDevice hinting;
#ifndef HB_NO_VAR
VariationDevice variation;
#endif
} u;
public:
DEFINE_SIZE_UNION (6, b);
};
} /* namespace OT */
#endif /* HB_OT_LAYOUT_COMMON_HH */
Reference in New Issue View Git Blame Copy Permalink