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author | Akira Kakuto <kakuto@fuk.kindai.ac.jp> | 2017-01-25 07:36:33 +0000 |
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committer | Akira Kakuto <kakuto@fuk.kindai.ac.jp> | 2017-01-25 07:36:33 +0000 |
commit | 8675f5a4f4c77a22a3c5cba37c4335f7bd446c3b (patch) | |
tree | 97b07755e327bf7e5b72b3dbc00e2662af163414 /Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-var-hvar-table.hh | |
parent | f0c59df024ecb9aeb94b5e2b013c1693782e3d9e (diff) |
harfbuzz 1.4.2
git-svn-id: svn://tug.org/texlive/trunk@43048 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-var-hvar-table.hh')
-rw-r--r-- | Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-var-hvar-table.hh | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-var-hvar-table.hh b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-var-hvar-table.hh new file mode 100644 index 00000000000..3a2a820376f --- /dev/null +++ b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-var-hvar-table.hh @@ -0,0 +1,165 @@ +/* + * 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_HVAR_TABLE_HH +#define HB_OT_VAR_HVAR_TABLE_HH + +#include "hb-ot-layout-common-private.hh" + + +namespace OT { + + +struct DeltaSetIndexMap +{ + inline bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this) && + c->check_array (mapData, get_width (), mapCount)); + } + + unsigned int map (unsigned int v) const /* Returns 16.16 outer.inner. */ + { + /* If count is zero, pass value unchanged. This takes + * care of direct mapping for advance map. */ + if (!mapCount) + return v; + + if (v >= mapCount) + v = mapCount - 1; + + unsigned int u = 0; + { /* Fetch it. */ + unsigned int w = get_width (); + const BYTE *p = mapData + w * v; + for (; w; w--) + u = (u << 8) + *p++; + } + + { /* Repack it. */ + unsigned int n = get_inner_bitcount (); + unsigned int outer = u >> n; + unsigned int inner = u & ((1 << n) - 1); + u = (outer<<16) | inner; + } + + return u; + } + + protected: + inline unsigned int get_width (void) const + { return ((format >> 4) & 3) + 1; } + + inline unsigned int get_inner_bitcount (void) const + { return (format & 0xF) + 1; } + + protected: + USHORT format; /* A packed field that describes the compressed + * representation of delta-set indices. */ + USHORT mapCount; /* The number of mapping entries. */ + BYTE mapData[VAR]; /* The delta-set index mapping data. */ + + public: + DEFINE_SIZE_ARRAY (4, mapData); +}; + + +/* + * HVAR -- The Horizontal Metrics Variations Table + * VVAR -- The Vertical Metrics Variations Table + */ + +#define HB_OT_TAG_HVAR HB_TAG('H','V','A','R') +#define HB_OT_TAG_VVAR HB_TAG('V','V','A','R') + +struct HVARVVAR +{ + static const hb_tag_t HVARTag = HB_OT_TAG_HVAR; + static const hb_tag_t VVARTag = HB_OT_TAG_VVAR; + + inline bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (version.sanitize (c) && + likely (version.major == 1) && + varStore.sanitize (c, this) && + advMap.sanitize (c, this) && + lsbMap.sanitize (c, this) && + rsbMap.sanitize (c, this)); + } + + inline float get_advance_var (hb_codepoint_t glyph, + int *coords, unsigned int coord_count) const + { + unsigned int varidx = (this+advMap).map (glyph); + return (this+varStore).get_delta (varidx, coords, coord_count); + } + + inline bool has_sidebearing_deltas (void) const + { return lsbMap && rsbMap; } + + protected: + FixedVersion<>version; /* Version of the metrics variation table + * initially set to 0x00010000u */ + LOffsetTo<VariationStore> + varStore; /* Offset to item variation store table. */ + LOffsetTo<DeltaSetIndexMap> + advMap; /* Offset to advance var-idx mapping. */ + LOffsetTo<DeltaSetIndexMap> + lsbMap; /* Offset to lsb/tsb var-idx mapping. */ + LOffsetTo<DeltaSetIndexMap> + rsbMap; /* Offset to rsb/bsb var-idx mapping. */ + + public: + DEFINE_SIZE_STATIC (20); +}; + +struct HVAR : HVARVVAR { + static const hb_tag_t tableTag = HB_OT_TAG_HVAR; +}; +struct VVAR : HVARVVAR { + static const hb_tag_t tableTag = HB_OT_TAG_VVAR; + + inline bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (static_cast<const HVARVVAR *> (this)->sanitize (c) && + vorgMap.sanitize (c, this)); + } + + protected: + LOffsetTo<DeltaSetIndexMap> + vorgMap; /* Offset to vertical-origin var-idx mapping. */ + + public: + DEFINE_SIZE_STATIC (24); +}; + +} /* namespace OT */ + + +#endif /* HB_OT_VAR_HVAR_TABLE_HH */ |