656 lines
20 KiB
C++
656 lines
20 KiB
C++
/*
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* Copyright © 2016 Elie Roux <elie.roux@telecom-bretagne.eu>
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* Copyright © 2018 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef HB_OT_LAYOUT_BASE_TABLE_HH
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#define HB_OT_LAYOUT_BASE_TABLE_HH
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#include "hb-open-type-private.hh"
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#include "hb-ot-layout-common-private.hh"
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namespace OT {
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#define NOT_INDEXED ((unsigned int) -1)
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/*
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* BASE -- The BASE Table
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*/
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struct BaseCoordFormat1
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{
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inline int get_coord (void) const { return coordinate; }
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this));
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}
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protected:
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HBUINT16 format; /* Format identifier--format = 1 */
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HBINT16 coordinate; /* X or Y value, in design units */
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public:
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DEFINE_SIZE_STATIC (4);
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};
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struct BaseCoordFormat2
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{
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inline int get_coord (void) const
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{
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/* TODO */
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return coordinate;
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}
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this));
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}
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protected:
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HBUINT16 format; /* Format identifier--format = 2 */
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HBINT16 coordinate; /* X or Y value, in design units */
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GlyphID referenceGlyph; /* Glyph ID of control glyph */
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HBUINT16 coordPoint; /* Index of contour point on the
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* reference glyph */
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public:
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DEFINE_SIZE_STATIC (8);
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};
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struct BaseCoordFormat3
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{
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inline int get_coord (void) const
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{
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/* TODO */
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return coordinate;
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}
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this) && deviceTable.sanitize (c, this));
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}
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protected:
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HBUINT16 format; /* Format identifier--format = 3 */
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HBINT16 coordinate; /* X or Y value, in design units */
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OffsetTo<Device> deviceTable; /* Offset to Device table for X or
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* Y value, from beginning of
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* BaseCoord table (may be NULL). */
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public:
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DEFINE_SIZE_STATIC (6);
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};
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struct BaseCoord
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{
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inline int get_coord (void) const
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{
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switch (u.format) {
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case 1: return u.format1.get_coord ();
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case 2: return u.format2.get_coord ();
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case 3: return u.format3.get_coord ();
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default:return 0;
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}
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}
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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if (!u.format.sanitize (c)) return_trace (false);
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switch (u.format) {
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case 1: return_trace (u.format1.sanitize (c));
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case 2: return_trace (u.format2.sanitize (c));
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case 3: return_trace (u.format3.sanitize (c));
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default:return_trace (false);
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}
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}
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protected:
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union {
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HBUINT16 format;
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BaseCoordFormat1 format1;
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BaseCoordFormat2 format2;
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BaseCoordFormat3 format3;
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} u;
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public:
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DEFINE_SIZE_UNION (2, format);
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};
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struct FeatMinMaxRecord
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{
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inline int get_min_value (void) const
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{ return (this+minCoord).get_coord(); }
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inline int get_max_value (void) const
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{ return (this+maxCoord).get_coord(); }
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inline const Tag &get_tag () const
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{ return tag; }
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inline bool sanitize (hb_sanitize_context_t *c, const void *base) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this) &&
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minCoord.sanitize (c, base) &&
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maxCoord.sanitize (c, base));
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}
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protected:
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Tag tag; /* 4-byte feature identification tag--must
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* match feature tag in FeatureList */
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OffsetTo<BaseCoord> minCoord; /* Offset to BaseCoord table that defines
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* the minimum extent value, from beginning
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* of MinMax table (may be NULL) */
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OffsetTo<BaseCoord> maxCoord; /* Offset to BaseCoord table that defines
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* the maximum extent value, from beginning
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* of MinMax table (may be NULL) */
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public:
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DEFINE_SIZE_STATIC (8);
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};
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struct MinMax
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{
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inline unsigned int get_feature_tag_index (Tag featureTableTag) const
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{
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/* TODO bsearch */
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unsigned int count = featMinMaxRecords.len;
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for (unsigned int i = 0; i < count; i++)
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{
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Tag tag = featMinMaxRecords[i].get_tag();
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int cmp = tag.cmp(featureTableTag);
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if (cmp == 0) return i;
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if (cmp > 0) return NOT_INDEXED;
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}
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return NOT_INDEXED;
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}
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inline int get_min_value (unsigned int featureTableTagIndex) const
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{
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if (featureTableTagIndex == NOT_INDEXED)
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return (this+minCoord).get_coord();
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return featMinMaxRecords[featureTableTagIndex].get_min_value();
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}
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inline int get_max_value (unsigned int featureTableTagIndex) const
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{
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if (featureTableTagIndex == NOT_INDEXED)
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return (this+maxCoord).get_coord();
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return featMinMaxRecords[featureTableTagIndex].get_max_value();
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}
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this) &&
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minCoord.sanitize (c, this) &&
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maxCoord.sanitize (c, this) &&
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featMinMaxRecords.sanitize (c, this));
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}
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protected:
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OffsetTo<BaseCoord> minCoord; /* Offset to BaseCoord table that defines
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* minimum extent value, from the beginning
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* of MinMax table (may be NULL) */
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OffsetTo<BaseCoord> maxCoord; /* Offset to BaseCoord table that defines
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* maximum extent value, from the beginning
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* of MinMax table (may be NULL) */
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ArrayOf<FeatMinMaxRecord>
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featMinMaxRecords; /* Array of FeatMinMaxRecords, in alphabetical
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* order by featureTableTag */
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public:
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DEFINE_SIZE_ARRAY (6, featMinMaxRecords);
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};
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/* TODO... */
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struct BaseLangSysRecord
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{
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inline const Tag& get_tag(void) const
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{ return baseLangSysTag; }
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inline unsigned int get_feature_tag_index (Tag featureTableTag) const
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{ return (this+minMax).get_feature_tag_index(featureTableTag); }
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inline int get_min_value (unsigned int featureTableTagIndex) const
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{ return (this+minMax).get_min_value(featureTableTagIndex); }
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inline int get_max_value (unsigned int featureTableTagIndex) const
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{ return (this+minMax).get_max_value(featureTableTagIndex); }
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inline bool sanitize (hb_sanitize_context_t *c, const void *base) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this) &&
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minMax.sanitize (c, base));
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}
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protected:
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Tag baseLangSysTag;
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OffsetTo<MinMax> minMax;
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public:
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DEFINE_SIZE_STATIC (6);
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};
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struct BaseValues
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{
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inline unsigned int get_default_base_tag_index (void) const
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{ return defaultIndex; }
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inline int get_base_coord (unsigned int baselineTagIndex) const
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{
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return (this+baseCoords[baselineTagIndex]).get_coord();
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}
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this) &&
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defaultIndex <= baseCoordCount &&
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baseCoords.sanitize (c, this));
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}
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protected:
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Index defaultIndex;
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HBUINT16 baseCoordCount;
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OffsetArrayOf<BaseCoord> baseCoords;
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public:
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DEFINE_SIZE_ARRAY (6, baseCoords);
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};
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struct BaseScript {
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inline unsigned int get_lang_tag_index (Tag baseLangSysTag) const
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{
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Tag tag;
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int cmp;
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for (unsigned int i = 0; i < baseLangSysCount; i++) {
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tag = baseLangSysRecords[i].get_tag();
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// taking advantage of alphabetical order
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cmp = tag.cmp(baseLangSysTag);
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if (cmp == 0) return i;
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if (cmp > 0) return NOT_INDEXED;
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}
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return NOT_INDEXED;
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}
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inline unsigned int get_feature_tag_index (unsigned int baseLangSysIndex, Tag featureTableTag) const
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{
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if (baseLangSysIndex == NOT_INDEXED) {
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if (unlikely(defaultMinMax)) return NOT_INDEXED;
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return (this+defaultMinMax).get_feature_tag_index(featureTableTag);
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}
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if (unlikely(baseLangSysIndex >= baseLangSysCount)) return NOT_INDEXED;
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return baseLangSysRecords[baseLangSysIndex].get_feature_tag_index(featureTableTag);
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}
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inline int get_min_value (unsigned int baseLangSysIndex, unsigned int featureTableTagIndex) const
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{
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if (baseLangSysIndex == NOT_INDEXED)
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return (this+defaultMinMax).get_min_value(featureTableTagIndex);
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return baseLangSysRecords[baseLangSysIndex].get_max_value(featureTableTagIndex);
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}
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inline int get_max_value (unsigned int baseLangSysIndex, unsigned int featureTableTagIndex) const
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{
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if (baseLangSysIndex == NOT_INDEXED)
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return (this+defaultMinMax).get_min_value(featureTableTagIndex);
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return baseLangSysRecords[baseLangSysIndex].get_max_value(featureTableTagIndex);
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}
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inline unsigned int get_default_base_tag_index (void) const
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{ return (this+baseValues).get_default_base_tag_index(); }
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inline int get_base_coord (unsigned int baselineTagIndex) const
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{ return (this+baseValues).get_base_coord(baselineTagIndex); }
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this) &&
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baseValues.sanitize (c, this) &&
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defaultMinMax.sanitize (c, this) &&
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baseLangSysRecords.sanitize (c, this));
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}
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protected:
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OffsetTo<BaseValues> baseValues;
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OffsetTo<MinMax> defaultMinMax;
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HBUINT16 baseLangSysCount;
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ArrayOf<BaseLangSysRecord> baseLangSysRecords;
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public:
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DEFINE_SIZE_ARRAY (8, baseLangSysRecords);
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};
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struct BaseScriptRecord {
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inline const Tag& get_tag (void) const
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{ return baseScriptTag; }
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inline unsigned int get_default_base_tag_index(void) const
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{ return (this+baseScript).get_default_base_tag_index(); }
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inline int get_base_coord(unsigned int baselineTagIndex) const
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{ return (this+baseScript).get_base_coord(baselineTagIndex); }
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inline unsigned int get_lang_tag_index (Tag baseLangSysTag) const
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{ return (this+baseScript).get_lang_tag_index(baseLangSysTag); }
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inline unsigned int get_feature_tag_index (unsigned int baseLangSysIndex, Tag featureTableTag) const
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{ return (this+baseScript).get_feature_tag_index(baseLangSysIndex, featureTableTag); }
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inline int get_max_value (unsigned int baseLangSysIndex, unsigned int featureTableTagIndex) const
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{ return (this+baseScript).get_max_value(baseLangSysIndex, featureTableTagIndex); }
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inline int get_min_value (unsigned int baseLangSysIndex, unsigned int featureTableTagIndex) const
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{ return (this+baseScript).get_min_value(baseLangSysIndex, featureTableTagIndex); }
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inline bool sanitize (hb_sanitize_context_t *c, const void *base) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this) &&
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baseScript != Null(OffsetTo<BaseScript>) &&
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baseScript.sanitize (c, base));
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}
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protected:
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Tag baseScriptTag;
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OffsetTo<BaseScript> baseScript;
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public:
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DEFINE_SIZE_STATIC (6);
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};
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struct BaseScriptList {
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inline unsigned int get_base_script_index (Tag baseScriptTag) const
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{
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for (unsigned int i = 0; i < baseScriptCount; i++)
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if (baseScriptRecords[i].get_tag() == baseScriptTag)
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return i;
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return NOT_INDEXED;
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}
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inline unsigned int get_default_base_tag_index (unsigned int baseScriptIndex) const
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{
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if (unlikely(baseScriptIndex >= baseScriptCount)) return NOT_INDEXED;
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return baseScriptRecords[baseScriptIndex].get_default_base_tag_index();
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}
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inline int get_base_coord(unsigned int baseScriptIndex, unsigned int baselineTagIndex) const
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{
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return baseScriptRecords[baseScriptIndex].get_base_coord(baselineTagIndex);
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}
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inline unsigned int get_lang_tag_index (unsigned int baseScriptIndex, Tag baseLangSysTag) const
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{
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if (unlikely(baseScriptIndex >= baseScriptCount)) return NOT_INDEXED;
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return baseScriptRecords[baseScriptIndex].get_lang_tag_index(baseLangSysTag);
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}
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inline unsigned int get_feature_tag_index (unsigned int baseScriptIndex, unsigned int baseLangSysIndex, Tag featureTableTag) const
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{
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if (unlikely(baseScriptIndex >= baseScriptCount)) return NOT_INDEXED;
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return baseScriptRecords[baseScriptIndex].get_feature_tag_index(baseLangSysIndex, featureTableTag);
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}
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inline int get_max_value (unsigned int baseScriptIndex, unsigned int baseLangSysIndex, unsigned int featureTableTagIndex) const
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{
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return baseScriptRecords[baseScriptIndex].get_max_value(baseLangSysIndex, featureTableTagIndex);
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}
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inline int get_min_value (unsigned int baseScriptIndex, unsigned int baseLangSysIndex, unsigned int featureTableTagIndex) const
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{
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return baseScriptRecords[baseScriptIndex].get_min_value(baseLangSysIndex, featureTableTagIndex);
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}
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this) &&
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baseScriptRecords.sanitize (c, this));
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}
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protected:
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HBUINT16 baseScriptCount;
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ArrayOf<BaseScriptRecord> baseScriptRecords;
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public:
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DEFINE_SIZE_ARRAY (4, baseScriptRecords);
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};
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struct BaseTagList
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{
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inline unsigned int get_tag_index(Tag baselineTag) const
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{
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for (unsigned int i = 0; i < baseTagCount; i++)
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if (baselineTags[i] == baselineTag)
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return i;
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return NOT_INDEXED;
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}
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this));
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}
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protected:
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HBUINT16 baseTagCount;
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SortedArrayOf<Tag> baselineTags;
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public:
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DEFINE_SIZE_ARRAY (4, baselineTags);
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};
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struct Axis
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{
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inline unsigned int get_base_tag_index(Tag baselineTag) const
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{
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if (unlikely(baseTagList == Null(OffsetTo<BaseTagList>))) return NOT_INDEXED;
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return (this+baseTagList).get_tag_index(baselineTag);
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}
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inline unsigned int get_default_base_tag_index_for_script_index (unsigned int baseScriptIndex) const
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{
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if (unlikely(baseScriptList == Null(OffsetTo<BaseScriptList>))) return NOT_INDEXED;
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return (this+baseScriptList).get_default_base_tag_index(baseScriptIndex);
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}
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inline int get_base_coord(unsigned int baseScriptIndex, unsigned int baselineTagIndex) const
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{
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return (this+baseScriptList).get_base_coord(baseScriptIndex, baselineTagIndex);
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}
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inline unsigned int get_lang_tag_index (unsigned int baseScriptIndex, Tag baseLangSysTag) const
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{
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if (unlikely(baseScriptList == Null(OffsetTo<BaseScriptList>))) return NOT_INDEXED;
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return (this+baseScriptList).get_lang_tag_index(baseScriptIndex, baseLangSysTag);
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}
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inline unsigned int get_feature_tag_index (unsigned int baseScriptIndex, unsigned int baseLangSysIndex, Tag featureTableTag) const
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{
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if (unlikely(baseScriptList == Null(OffsetTo<BaseScriptList>))) return NOT_INDEXED;
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return (this+baseScriptList).get_feature_tag_index(baseScriptIndex, baseLangSysIndex, featureTableTag);
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}
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inline int get_max_value (unsigned int baseScriptIndex, unsigned int baseLangSysIndex, unsigned int featureTableTagIndex) const
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{
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return (this+baseScriptList).get_max_value(baseScriptIndex, baseLangSysIndex, featureTableTagIndex);
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}
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inline int get_min_value (unsigned int baseScriptIndex, unsigned int baseLangSysIndex, unsigned int featureTableTagIndex) const
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{
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return (this+baseScriptList).get_min_value(baseScriptIndex, baseLangSysIndex, featureTableTagIndex);
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}
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this) &&
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baseTagList.sanitize (c, this) &&
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baseScriptList.sanitize (c, this));
|
|
}
|
|
|
|
protected:
|
|
OffsetTo<BaseTagList> baseTagList;
|
|
OffsetTo<BaseScriptList> baseScriptList;
|
|
|
|
public:
|
|
DEFINE_SIZE_STATIC (4);
|
|
};
|
|
|
|
struct BASE
|
|
{
|
|
static const hb_tag_t tableTag = HB_OT_TAG_BASE;
|
|
|
|
inline bool has_vert_axis(void)
|
|
{ return vertAxis != Null(OffsetTo<Axis>); }
|
|
|
|
inline bool has_horiz_axis(void)
|
|
{ return horizAxis != Null(OffsetTo<Axis>); }
|
|
|
|
// horizontal axis base coords:
|
|
|
|
inline unsigned int get_horiz_base_tag_index(Tag baselineTag) const
|
|
{
|
|
if (unlikely(horizAxis == Null(OffsetTo<Axis>))) return NOT_INDEXED;
|
|
return (this+horizAxis).get_base_tag_index(baselineTag);
|
|
}
|
|
|
|
inline unsigned int get_horiz_default_base_tag_index_for_script_index (unsigned int baseScriptIndex) const
|
|
{
|
|
if (unlikely(horizAxis == Null(OffsetTo<Axis>))) return NOT_INDEXED;
|
|
return (this+horizAxis).get_default_base_tag_index_for_script_index(baseScriptIndex);
|
|
}
|
|
|
|
inline int get_horiz_base_coord(unsigned int baseScriptIndex, unsigned int baselineTagIndex) const
|
|
{
|
|
return (this+horizAxis).get_base_coord(baseScriptIndex, baselineTagIndex);
|
|
}
|
|
|
|
// vertical axis base coords:
|
|
|
|
inline unsigned int get_vert_base_tag_index(Tag baselineTag) const
|
|
{
|
|
if (unlikely(vertAxis == Null(OffsetTo<Axis>))) return NOT_INDEXED;
|
|
return (this+vertAxis).get_base_tag_index(baselineTag);
|
|
}
|
|
|
|
inline unsigned int get_vert_default_base_tag_index_for_script_index (unsigned int baseScriptIndex) const
|
|
{
|
|
if (unlikely(vertAxis == Null(OffsetTo<Axis>))) return NOT_INDEXED;
|
|
return (this+vertAxis).get_default_base_tag_index_for_script_index(baseScriptIndex);
|
|
}
|
|
|
|
inline int get_vert_base_coord(unsigned int baseScriptIndex, unsigned int baselineTagIndex) const
|
|
{
|
|
return (this+vertAxis).get_base_coord(baseScriptIndex, baselineTagIndex);
|
|
}
|
|
|
|
// horizontal axis min/max coords:
|
|
|
|
inline unsigned int get_horiz_lang_tag_index (unsigned int baseScriptIndex, Tag baseLangSysTag) const
|
|
{
|
|
if (unlikely(horizAxis == Null(OffsetTo<Axis>))) return NOT_INDEXED;
|
|
return (this+horizAxis).get_lang_tag_index (baseScriptIndex, baseLangSysTag);
|
|
}
|
|
|
|
inline unsigned int get_horiz_feature_tag_index (unsigned int baseScriptIndex, unsigned int baseLangSysIndex, Tag featureTableTag) const
|
|
{
|
|
if (unlikely(horizAxis == Null(OffsetTo<Axis>))) return NOT_INDEXED;
|
|
return (this+horizAxis).get_feature_tag_index (baseScriptIndex, baseLangSysIndex, featureTableTag);
|
|
}
|
|
|
|
inline int get_horiz_max_value (unsigned int baseScriptIndex, unsigned int baseLangSysIndex, unsigned int featureTableTagIndex) const
|
|
{
|
|
return (this+horizAxis).get_max_value (baseScriptIndex, baseLangSysIndex, featureTableTagIndex);
|
|
}
|
|
|
|
inline int get_horiz_min_value (unsigned int baseScriptIndex, unsigned int baseLangSysIndex, unsigned int featureTableTagIndex) const
|
|
{
|
|
return (this+horizAxis).get_min_value (baseScriptIndex, baseLangSysIndex, featureTableTagIndex);
|
|
}
|
|
|
|
// vertical axis min/max coords:
|
|
|
|
inline unsigned int get_vert_lang_tag_index (unsigned int baseScriptIndex, Tag baseLangSysTag) const
|
|
{
|
|
if (unlikely(vertAxis == Null(OffsetTo<Axis>))) return NOT_INDEXED;
|
|
return (this+vertAxis).get_lang_tag_index (baseScriptIndex, baseLangSysTag);
|
|
}
|
|
|
|
inline unsigned int get_vert_feature_tag_index (unsigned int baseScriptIndex, unsigned int baseLangSysIndex, Tag featureTableTag) const
|
|
{
|
|
if (unlikely(vertAxis == Null(OffsetTo<Axis>))) return NOT_INDEXED;
|
|
return (this+vertAxis).get_feature_tag_index (baseScriptIndex, baseLangSysIndex, featureTableTag);
|
|
}
|
|
|
|
inline int get_vert_max_value (unsigned int baseScriptIndex, unsigned int baseLangSysIndex, unsigned int featureTableTagIndex) const
|
|
{
|
|
return (this+vertAxis).get_max_value (baseScriptIndex, baseLangSysIndex, featureTableTagIndex);
|
|
}
|
|
|
|
inline int get_vert_min_value (unsigned int baseScriptIndex, unsigned int baseLangSysIndex, unsigned int featureTableTagIndex) const
|
|
{
|
|
return (this+vertAxis).get_min_value (baseScriptIndex, baseLangSysIndex, featureTableTagIndex);
|
|
}
|
|
|
|
inline bool sanitize (hb_sanitize_context_t *c) const
|
|
{
|
|
TRACE_SANITIZE (this);
|
|
return_trace (c->check_struct (this) &&
|
|
likely (version.major == 1) &&
|
|
horizAxis.sanitize (c, this) &&
|
|
vertAxis.sanitize (c, this) &&
|
|
(version.to_int () < 0x00010001u || varStore.sanitize (c, this)));
|
|
}
|
|
|
|
protected:
|
|
FixedVersion<> version;
|
|
OffsetTo<Axis> horizAxis;
|
|
OffsetTo<Axis> vertAxis;
|
|
LOffsetTo<VariationStore>
|
|
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 */
|