116 lines
3.4 KiB
C++
116 lines
3.4 KiB
C++
/*
|
|
* Copyright © 2017 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.
|
|
*
|
|
* Google Author(s): Behdad Esfahbod
|
|
*/
|
|
|
|
#ifndef HB_OT_VAR_MVAR_TABLE_HH
|
|
#define HB_OT_VAR_MVAR_TABLE_HH
|
|
|
|
#include "hb-ot-layout-common.hh"
|
|
|
|
|
|
namespace OT {
|
|
|
|
|
|
struct VariationValueRecord
|
|
{
|
|
inline bool sanitize (hb_sanitize_context_t *c) const
|
|
{
|
|
TRACE_SANITIZE (this);
|
|
return_trace (c->check_struct (this));
|
|
}
|
|
|
|
public:
|
|
Tag valueTag; /* Four-byte tag identifying a font-wide measure. */
|
|
HBUINT32 varIdx; /* Outer/inner index into VariationStore item. */
|
|
|
|
public:
|
|
DEFINE_SIZE_STATIC (8);
|
|
};
|
|
|
|
|
|
/*
|
|
* MVAR -- Metrics Variations
|
|
* https://docs.microsoft.com/en-us/typography/opentype/spec/mvar
|
|
*/
|
|
#define HB_OT_TAG_MVAR HB_TAG('M','V','A','R')
|
|
|
|
struct MVAR
|
|
{
|
|
static const hb_tag_t tableTag = HB_OT_TAG_MVAR;
|
|
|
|
inline bool sanitize (hb_sanitize_context_t *c) const
|
|
{
|
|
TRACE_SANITIZE (this);
|
|
return_trace (version.sanitize (c) &&
|
|
likely (version.major == 1) &&
|
|
c->check_struct (this) &&
|
|
valueRecordSize >= VariationValueRecord::static_size &&
|
|
varStore.sanitize (c, this) &&
|
|
c->check_array (valuesZ.arrayZ, valueRecordCount, valueRecordSize));
|
|
}
|
|
|
|
inline float get_var (hb_tag_t tag,
|
|
const int *coords, unsigned int coord_count) const
|
|
{
|
|
const VariationValueRecord *record;
|
|
record = (VariationValueRecord *) bsearch (&tag, valuesZ.arrayZ,
|
|
valueRecordCount, valueRecordSize,
|
|
tag_compare);
|
|
if (!record)
|
|
return 0.;
|
|
|
|
return (this+varStore).get_delta (record->varIdx, coords, coord_count);
|
|
}
|
|
|
|
protected:
|
|
static inline int tag_compare (const void *pa, const void *pb)
|
|
{
|
|
const hb_tag_t *a = (const hb_tag_t *) pa;
|
|
const Tag *b = (const Tag *) pb;
|
|
return b->cmp (*a);
|
|
}
|
|
|
|
protected:
|
|
FixedVersion<>version; /* Version of the metrics variation table
|
|
* initially set to 0x00010000u */
|
|
HBUINT16 reserved; /* Not used; set to 0. */
|
|
HBUINT16 valueRecordSize;/* The size in bytes of each value record —
|
|
* must be greater than zero. */
|
|
HBUINT16 valueRecordCount;/* The number of value records — may be zero. */
|
|
OffsetTo<VariationStore>
|
|
varStore; /* Offset to item variation store table. */
|
|
UnsizedArrayOf<HBUINT8>
|
|
valuesZ; /* Array of value records. The records must be
|
|
* in binary order of their valueTag field. */
|
|
|
|
public:
|
|
DEFINE_SIZE_ARRAY (12, valuesZ);
|
|
};
|
|
|
|
} /* namespace OT */
|
|
|
|
|
|
#endif /* HB_OT_VAR_MVAR_TABLE_HH */
|