mozilla-central/gfx/harfbuzz/src/hb-ot-layout-base-table.hh (file symbol)

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/*
* Copyright © 2016 Elie Roux <elie.roux@telecom-bretagne.eu>
* Copyright © 2018 Google, Inc.
* Copyright © 2018-2019 Ebrahim Byagowi
*
* 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.
*
* Google Author(s): Behdad Esfahbod
*/
#ifndef HB_OT_LAYOUT_BASE_TABLE_HH
#define HB_OT_LAYOUT_BASE_TABLE_HH
#include "hb-open-type.hh"
#include "hb-ot-layout-common.hh"
namespace OT {
/*
* BASE -- Baseline
*/
struct BaseCoordFormat1
{
hb_position_t get_coord (hb_font_t *font, hb_direction_t direction) const
{
return HB_DIRECTION_IS_HORIZONTAL (direction) ? font->em_scale_y (coordinate) : font->em_scale_x (coordinate);
}
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));
}
protected:
HBUINT16 format; /* Format identifier--format = 1 */
FWORD coordinate; /* X or Y value, in design units */
public:
DEFINE_SIZE_STATIC (4);
};
struct BaseCoordFormat2
{
hb_position_t get_coord (hb_font_t *font, hb_direction_t direction) const
{
/* TODO */
return HB_DIRECTION_IS_HORIZONTAL (direction) ? font->em_scale_y (coordinate) : font->em_scale_x (coordinate);
}
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 (c->serializer->check_assign (out->referenceGlyph,
c->plan->glyph_map->get (referenceGlyph),
HB_SERIALIZE_ERROR_INT_OVERFLOW));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
protected:
HBUINT16 format; /* Format identifier--format = 2 */
FWORD coordinate; /* X or Y value, in design units */
HBGlyphID16 referenceGlyph; /* Glyph ID of control glyph */
HBUINT16 coordPoint; /* Index of contour point on the
* reference glyph */
public:
DEFINE_SIZE_STATIC (8);
};
struct BaseCoordFormat3
{
hb_position_t get_coord (hb_font_t *font,
const ItemVariationStore &var_store,
hb_direction_t direction) const
{
const Device &device = this+deviceTable;
return HB_DIRECTION_IS_HORIZONTAL (direction)
? font->em_scale_y (coordinate) + device.get_y_delta (font, var_store)
: font->em_scale_x (coordinate) + device.get_x_delta (font, var_store);
}
void collect_variation_indices (hb_set_t& varidx_set /* OUT */) const
{
unsigned varidx = (this+deviceTable).get_variation_index ();
varidx_set.add (varidx);
}
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->embed (*this);
if (unlikely (!out)) return_trace (false);
if (!c->plan->pinned_at_default)
{
unsigned var_idx = (this+deviceTable).get_variation_index ();
if (var_idx != VarIdx::NO_VARIATION)
{
hb_pair_t<unsigned, int> *v;
if (!c->plan->base_variation_idx_map.has (var_idx, &v))
return_trace (false);
if (unlikely (!c->serializer->check_assign (out->coordinate, coordinate + hb_second (*v),
HB_SERIALIZE_ERROR_INT_OVERFLOW)))
return_trace (false);
}
}
return_trace (out->deviceTable.serialize_copy (c->serializer, deviceTable,
this, 0,
hb_serialize_context_t::Head,
&c->plan->base_variation_idx_map));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (likely (c->check_struct (this) &&
deviceTable.sanitize (c, this)));
}
protected:
HBUINT16 format; /* Format identifier--format = 3 */
FWORD coordinate; /* X or Y value, in design units */
Offset16To<Device>
deviceTable; /* Offset to Device table for X or
* Y value, from beginning of
* BaseCoord table (may be NULL). */
public:
DEFINE_SIZE_STATIC (6);
};
struct BaseCoord
{
bool has_data () const { return u.format; }
hb_position_t get_coord (hb_font_t *font,
const ItemVariationStore &var_store,
hb_direction_t direction) const
{
switch (u.format) {
case 1: hb_barrier (); return u.format1.get_coord (font, direction);
case 2: hb_barrier (); return u.format2.get_coord (font, direction);
case 3: hb_barrier (); return u.format3.get_coord (font, var_store, direction);
default:return 0;
}
}
void collect_variation_indices (hb_set_t& varidx_set /* OUT */) const
{
switch (u.format) {
case 3: hb_barrier (); u.format3.collect_variation_indices (varidx_set);
default:return;
}
}
template <typename context_t, typename ...Ts>
typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const
{
if (unlikely (!c->may_dispatch (this, &u.format))) return c->no_dispatch_return_value ();
TRACE_DISPATCH (this, u.format);
switch (u.format) {
case 1: hb_barrier (); return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...));
case 2: hb_barrier (); return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...));
case 3: hb_barrier (); return_trace (c->dispatch (u.format3, std::forward<Ts> (ds)...));
default:return_trace (c->default_return_value ());
}
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
if (unlikely (!u.format.sanitize (c))) return_trace (false);
hb_barrier ();
switch (u.format) {
case 1: hb_barrier (); return_trace (u.format1.sanitize (c));
case 2: hb_barrier (); return_trace (u.format2.sanitize (c));
case 3: hb_barrier (); return_trace (u.format3.sanitize (c));
default:return_trace (false);
}
}
protected:
union {
HBUINT16 format;
BaseCoordFormat1 format1;
BaseCoordFormat2 format2;
BaseCoordFormat3 format3;
} u;
public:
DEFINE_SIZE_UNION (2, format);
};
struct FeatMinMaxRecord
{
int cmp (hb_tag_t key) const { return tag.cmp (key); }
bool has_data () const { return tag; }
hb_tag_t get_feature_tag () const { return tag; }
void get_min_max (const BaseCoord **min, const BaseCoord **max) const
{
if (likely (min)) *min = &(this+minCoord);
if (likely (max)) *max = &(this+maxCoord);
}
void collect_variation_indices (const hb_subset_plan_t* plan,
const void *base,
hb_set_t& varidx_set /* OUT */) const
{
if (!plan->layout_features.has (tag))
return;
(base+minCoord).collect_variation_indices (varidx_set);
(base+maxCoord).collect_variation_indices (varidx_set);
}
bool subset (hb_subset_context_t *c,
const void *base) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->embed (*this);
if (unlikely (!out)) return_trace (false);
if (!(out->minCoord.serialize_subset (c, minCoord, base)))
return_trace (false);
return_trace (out->maxCoord.serialize_subset (c, maxCoord, base));
}
bool sanitize (hb_sanitize_context_t *c, const void *base) const
{
TRACE_SANITIZE (this);
return_trace (likely (c->check_struct (this) &&
minCoord.sanitize (c, base) &&
maxCoord.sanitize (c, base)));
}
protected:
Tag tag; /* 4-byte feature identification tag--must
* match feature tag in FeatureList */
Offset16To<BaseCoord>
minCoord; /* Offset to BaseCoord table that defines
* the minimum extent value, from beginning
* of MinMax table (may be NULL) */
Offset16To<BaseCoord>
maxCoord; /* Offset to BaseCoord table that defines
* the maximum extent value, from beginning
* of MinMax table (may be NULL) */
public:
DEFINE_SIZE_STATIC (8);
};
struct MinMax
{
void get_min_max (hb_tag_t feature_tag,
const BaseCoord **min,
const BaseCoord **max) const
{
const FeatMinMaxRecord &minMaxCoord = featMinMaxRecords.bsearch (feature_tag);
if (minMaxCoord.has_data ())
minMaxCoord.get_min_max (min, max);
else
{
if (likely (min)) *min = &(this+minCoord);
if (likely (max)) *max = &(this+maxCoord);
}
}
void collect_variation_indices (const hb_subset_plan_t* plan,
hb_set_t& varidx_set /* OUT */) const
{
(this+minCoord).collect_variation_indices (varidx_set);
(this+maxCoord).collect_variation_indices (varidx_set);
for (const FeatMinMaxRecord& record : featMinMaxRecords)
record.collect_variation_indices (plan, this, varidx_set);
}
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);
if (!(out->minCoord.serialize_subset (c, minCoord, this)) ||
!(out->maxCoord.serialize_subset (c, maxCoord, this)))
return_trace (false);
unsigned len = 0;
for (const FeatMinMaxRecord& _ : featMinMaxRecords)
{
hb_tag_t feature_tag = _.get_feature_tag ();
if (!c->plan->layout_features.has (feature_tag))
continue;
if (!_.subset (c, this)) return false;
len++;
}
return_trace (c->serializer->check_assign (out->featMinMaxRecords.len, len,
HB_SERIALIZE_ERROR_INT_OVERFLOW));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (likely (c->check_struct (this) &&
minCoord.sanitize (c, this) &&
maxCoord.sanitize (c, this) &&
featMinMaxRecords.sanitize (c, this)));
}
protected:
Offset16To<BaseCoord>
minCoord; /* Offset to BaseCoord table that defines
* minimum extent value, from the beginning
* of MinMax table (may be NULL) */
Offset16To<BaseCoord>
maxCoord; /* Offset to BaseCoord table that defines
* maximum extent value, from the beginning
* of MinMax table (may be NULL) */
SortedArray16Of<FeatMinMaxRecord>
featMinMaxRecords;
/* Array of FeatMinMaxRecords, in alphabetical
* order by featureTableTag */
public:
DEFINE_SIZE_ARRAY (6, featMinMaxRecords);
};
struct BaseValues
{
const BaseCoord &get_base_coord (int baseline_tag_index) const
{
if (baseline_tag_index == -1) baseline_tag_index = defaultIndex;
return this+baseCoords[baseline_tag_index];
}
void collect_variation_indices (hb_set_t& varidx_set /* OUT */) const
{
for (const auto& _ : baseCoords)
(this+_).collect_variation_indices (varidx_set);
}
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->defaultIndex = defaultIndex;
for (const auto& _ : baseCoords)
if (!subset_offset_array (c, out->baseCoords, this) (_))
return_trace (false);
return_trace (bool (out->baseCoords));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (likely (c->check_struct (this) &&
baseCoords.sanitize (c, this)));
}
protected:
Index defaultIndex; /* Index number of default baseline for this
* script — equals index position of baseline tag
* in baselineTags array of the BaseTagList */
Array16OfOffset16To<BaseCoord>
baseCoords; /* Number of BaseCoord tables defined — should equal
* baseTagCount in the BaseTagList
*
* Array of offsets to BaseCoord tables, from beginning of
* BaseValues table — order matches baselineTags array in
* the BaseTagList */
public:
DEFINE_SIZE_ARRAY (4, baseCoords);
};
struct BaseLangSysRecord
{
int cmp (hb_tag_t key) const { return baseLangSysTag.cmp (key); }
bool has_data () const { return baseLangSysTag; }
const MinMax &get_min_max (const void* base) const { return base+minMax; }
void collect_variation_indices (const void* base,
const hb_subset_plan_t* plan,
hb_set_t& varidx_set /* OUT */) const
{ (base+minMax).collect_variation_indices (plan, varidx_set); }
bool subset (hb_subset_context_t *c,
const void *base) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->embed (*this);
if (unlikely (!out)) return_trace (false);
return_trace (out->minMax.serialize_subset (c, minMax, base));
}
bool sanitize (hb_sanitize_context_t *c, const void *base) const
{
TRACE_SANITIZE (this);
return_trace (likely (c->check_struct (this) &&
minMax.sanitize (c, base)));
}
protected:
Tag baseLangSysTag; /* 4-byte language system identification tag */
Offset16To<MinMax>
minMax; /* Offset to MinMax table, from beginning
* of BaseScript table */
public:
DEFINE_SIZE_STATIC (6);
};
struct BaseScript
{
const MinMax &get_min_max (hb_tag_t language_tag) const
{
const BaseLangSysRecord& record = baseLangSysRecords.bsearch (language_tag);
return record.has_data () ? record.get_min_max (this) : this+defaultMinMax;
}
const BaseCoord &get_base_coord (int baseline_tag_index) const
{ return (this+baseValues).get_base_coord (baseline_tag_index); }
bool has_values () const { return baseValues; }
bool has_min_max () const { return defaultMinMax; /* TODO What if only per-language is present? */ }
void collect_variation_indices (const hb_subset_plan_t* plan,
hb_set_t& varidx_set /* OUT */) const
{
(this+baseValues).collect_variation_indices (varidx_set);
(this+defaultMinMax).collect_variation_indices (plan, varidx_set);
for (const BaseLangSysRecord& _ : baseLangSysRecords)
_.collect_variation_indices (this, plan, varidx_set);
}
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);
if (baseValues && !out->baseValues.serialize_subset (c, baseValues, this))
return_trace (false);
if (defaultMinMax && !out->defaultMinMax.serialize_subset (c, defaultMinMax, this))
return_trace (false);
for (const auto& _ : baseLangSysRecords)
if (!_.subset (c, this)) return_trace (false);
return_trace (c->serializer->check_assign (out->baseLangSysRecords.len, baseLangSysRecords.len,
HB_SERIALIZE_ERROR_INT_OVERFLOW));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (likely (c->check_struct (this) &&
baseValues.sanitize (c, this) &&
defaultMinMax.sanitize (c, this) &&
baseLangSysRecords.sanitize (c, this)));
}
protected:
Offset16To<BaseValues>
baseValues; /* Offset to BaseValues table, from beginning
* of BaseScript table (may be NULL) */
Offset16To<MinMax>
defaultMinMax; /* Offset to MinMax table, from beginning of
* BaseScript table (may be NULL) */
SortedArray16Of<BaseLangSysRecord>
baseLangSysRecords;
/* Number of BaseLangSysRecords
* defined — may be zero (0) */
public:
DEFINE_SIZE_ARRAY (6, baseLangSysRecords);
};
struct BaseScriptList;
struct BaseScriptRecord
{
int cmp (hb_tag_t key) const { return baseScriptTag.cmp (key); }
bool has_data () const { return baseScriptTag; }
hb_tag_t get_script_tag () const { return baseScriptTag; }
const BaseScript &get_base_script (const BaseScriptList *list) const
{ return list+baseScript; }
void collect_variation_indices (const hb_subset_plan_t* plan,
const void* list,
hb_set_t& varidx_set /* OUT */) const
{
if (!plan->layout_scripts.has (baseScriptTag))
return;
(list+baseScript).collect_variation_indices (plan, varidx_set);
}
bool subset (hb_subset_context_t *c,
const void *base) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->embed (*this);
if (unlikely (!out)) return_trace (false);
return_trace (out->baseScript.serialize_subset (c, baseScript, base));
}
bool sanitize (hb_sanitize_context_t *c, const void *base) const
{
TRACE_SANITIZE (this);
return_trace (likely (c->check_struct (this) &&
baseScript.sanitize (c, base)));
}
protected:
Tag baseScriptTag; /* 4-byte script identification tag */
Offset16To<BaseScript>
baseScript; /* Offset to BaseScript table, from beginning
* of BaseScriptList */
public:
DEFINE_SIZE_STATIC (6);
};
struct BaseScriptList
{
const BaseScript &get_base_script (hb_tag_t script) const
{
const BaseScriptRecord *record = &baseScriptRecords.bsearch (script);
if (!record->has_data ()) record = &baseScriptRecords.bsearch (HB_TAG ('D','F','L','T'));
return record->has_data () ? record->get_base_script (this) : Null (BaseScript);
}
void collect_variation_indices (const hb_subset_plan_t* plan,
hb_set_t& varidx_set /* OUT */) const
{
for (const BaseScriptRecord& _ : baseScriptRecords)
_.collect_variation_indices (plan, this, varidx_set);
}
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);
unsigned len = 0;
for (const BaseScriptRecord& _ : baseScriptRecords)
{
hb_tag_t script_tag = _.get_script_tag ();
if (!c->plan->layout_scripts.has (script_tag))
continue;
if (!_.subset (c, this)) return false;
len++;
}
return_trace (c->serializer->check_assign (out->baseScriptRecords.len, len,
HB_SERIALIZE_ERROR_INT_OVERFLOW));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) &&
baseScriptRecords.sanitize (c, this));
}
protected:
SortedArray16Of<BaseScriptRecord>
baseScriptRecords;
public:
DEFINE_SIZE_ARRAY (2, baseScriptRecords);
};
struct Axis
{
bool get_baseline (hb_tag_t baseline_tag,
hb_tag_t script_tag,
hb_tag_t language_tag,
const BaseCoord **coord) const
{
const BaseScript &base_script = (this+baseScriptList).get_base_script (script_tag);
if (!base_script.has_values ())
{
*coord = nullptr;
return false;
}
if (likely (coord))
{
unsigned int tag_index = 0;
if (!(this+baseTagList).bfind (baseline_tag, &tag_index))
{
*coord = nullptr;
return false;
}
*coord = &base_script.get_base_coord (tag_index);
}
return true;
}
bool get_min_max (hb_tag_t script_tag,
hb_tag_t language_tag,
hb_tag_t feature_tag,
const BaseCoord **min_coord,
const BaseCoord **max_coord) const
{
const BaseScript &base_script = (this+baseScriptList).get_base_script (script_tag);
if (!base_script.has_min_max ())
{
*min_coord = *max_coord = nullptr;
return false;
}
base_script.get_min_max (language_tag).get_min_max (feature_tag, min_coord, max_coord);
return true;
}
void collect_variation_indices (const hb_subset_plan_t* plan,
hb_set_t& varidx_set /* OUT */) const
{ (this+baseScriptList).collect_variation_indices (plan, varidx_set); }
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->embed (*this);
if (unlikely (!out)) return_trace (false);
out->baseTagList.serialize_copy (c->serializer, baseTagList, this);
return_trace (out->baseScriptList.serialize_subset (c, baseScriptList, this));
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (likely (c->check_struct (this) &&
baseTagList.sanitize (c, this) &&
baseScriptList.sanitize (c, this)));
}
protected:
Offset16To<SortedArray16Of<Tag>>
baseTagList; /* Offset to BaseTagList table, from beginning
* of Axis table (may be NULL)
* Array of 4-byte baseline identification tags — must
* be in alphabetical order */
Offset16To<BaseScriptList>
baseScriptList; /* Offset to BaseScriptList table, from beginning
* of Axis table
* Array of BaseScriptRecords, in alphabetical order
* by baseScriptTag */
public:
DEFINE_SIZE_STATIC (4);
};
struct BASE
{
static constexpr hb_tag_t tableTag = HB_OT_TAG_BASE;
const Axis &get_axis (hb_direction_t direction) const
{ return HB_DIRECTION_IS_VERTICAL (direction) ? this+vAxis : this+hAxis; }
bool has_var_store () const
{ return version.to_int () >= 0x00010001u && varStore != 0; }
const ItemVariationStore &get_var_store () const
{ return version.to_int () < 0x00010001u ? Null (ItemVariationStore) : this+varStore; }
void collect_variation_indices (const hb_subset_plan_t* plan,
hb_set_t& varidx_set /* OUT */) const
{
(this+hAxis).collect_variation_indices (plan, varidx_set);
(this+vAxis).collect_variation_indices (plan, varidx_set);
}
bool subset_varstore (hb_subset_context_t *c,
BASE *out /* OUT */) const
{
TRACE_SUBSET (this);
if (!c->serializer->allocate_size<Offset32To<ItemVariationStore>> (Offset32To<ItemVariationStore>::static_size))
return_trace (false);
if (!c->plan->normalized_coords)
return_trace (out->varStore.serialize_subset (c, varStore, this, c->plan->base_varstore_inner_maps.as_array ()));
if (c->plan->all_axes_pinned)
return_trace (true);
item_variations_t item_vars;
if (!item_vars.instantiate (this+varStore, c->plan, true, true,
c->plan->base_varstore_inner_maps.as_array ()))
return_trace (false);
if (!out->varStore.serialize_serialize (c->serializer,
item_vars.has_long_word (),
c->plan->axis_tags,
item_vars.get_region_list (),
item_vars.get_vardata_encodings ()))
return_trace (false);
const hb_map_t &varidx_map = item_vars.get_varidx_map ();
/* base_variation_idx_map in the plan is old_varidx->(varidx, delta)
* mapping, new varidx is generated for subsetting, we need to remap this
* after instancing */
for (auto _ : c->plan->base_variation_idx_map.iter_ref ())
{
uint32_t varidx = _.second.first;
uint32_t *new_varidx;
if (varidx_map.has (varidx, &new_varidx))
_.second.first = *new_varidx;
else
_.second.first = HB_OT_LAYOUT_NO_VARIATIONS_INDEX;
}
return_trace (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);
out->version = version;
if (has_var_store () && !subset_varstore (c, out))
return_trace (false);
if (hAxis && !out->hAxis.serialize_subset (c, hAxis, this))
return_trace (false);
if (vAxis && !out->vAxis.serialize_subset (c, vAxis, this))
return_trace (false);
return_trace (true);
}
bool get_baseline (hb_font_t *font,
hb_tag_t baseline_tag,
hb_direction_t direction,
hb_tag_t script_tag,
hb_tag_t language_tag,
hb_position_t *base) const
{
const BaseCoord *base_coord = nullptr;
if (unlikely (!get_axis (direction).get_baseline (baseline_tag, script_tag, language_tag, &base_coord) ||
!base_coord || !base_coord->has_data ()))
return false;
if (likely (base))
*base = base_coord->get_coord (font, get_var_store (), direction);
return true;
}
bool get_min_max (hb_font_t *font,
hb_direction_t direction,
hb_tag_t script_tag,
hb_tag_t language_tag,
hb_tag_t feature_tag,
hb_position_t *min,
hb_position_t *max) const
{
const BaseCoord *min_coord, *max_coord;
if (!get_axis (direction).get_min_max (script_tag, language_tag, feature_tag,
&min_coord, &max_coord))
return false;
const ItemVariationStore &var_store = get_var_store ();
if (likely (min && min_coord)) *min = min_coord->get_coord (font, var_store, direction);
if (likely (max && max_coord)) *max = max_coord->get_coord (font, var_store, direction);
return true;
}
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (likely (c->check_struct (this) &&
hb_barrier () &&
likely (version.major == 1) &&
hAxis.sanitize (c, this) &&
vAxis.sanitize (c, this) &&
(version.to_int () < 0x00010001u || varStore.sanitize (c, this))));
}
protected:
FixedVersion<>version; /* Version of the BASE table */
Offset16To<Axis>hAxis; /* Offset to horizontal Axis table, from beginning
* of BASE table (may be NULL) */
Offset16To<Axis>vAxis; /* Offset to vertical Axis table, from beginning
* of BASE table (may be NULL) */
Offset32To<ItemVariationStore>
varStore; /* Offset to the table of Item Variation
* Store--from beginning of BASE
* header (may be NULL). Introduced
* in version 0x00010001. */
public:
DEFINE_SIZE_MIN (8);
};
} /* namespace OT */
#endif /* HB_OT_LAYOUT_BASE_TABLE_HH */