/* * 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 { 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 constexpr hb_tag_t tableTag = HB_OT_TAG_MVAR; 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_range (valuesZ.arrayZ, valueRecordCount, valueRecordSize)); } float get_var (hb_tag_t tag, const int *coords, unsigned int coord_count) const { const VariationValueRecord *record; record = (VariationValueRecord *) hb_bsearch (tag, (const VariationValueRecord *) (const HBUINT8 *) valuesZ, valueRecordCount, valueRecordSize, tag_compare); if (!record) return 0.; return (this+varStore).get_delta (record->varIdx, coords, coord_count); } protected: static 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. */ Offset16To<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 */