HarfBuzz text shaping engine
http://harfbuzz.github.io/
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120 lines
3.9 KiB
120 lines
3.9 KiB
/* |
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* Copyright © 2018 Ebrahim Byagowi |
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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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#ifndef HB_AAT_LAYOUT_FEAT_TABLE_HH |
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#define HB_AAT_LAYOUT_FEAT_TABLE_HH |
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#include "hb-aat-layout-common-private.hh" |
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/* |
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* feat -- Feature Name |
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* https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6feat.html |
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*/ |
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#define HB_AAT_TAG_feat HB_TAG('f','e','a','t') |
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namespace AAT { |
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struct SettingName |
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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 (likely (c->check_struct (this))); |
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} |
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protected: |
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HBUINT16 setting; /* The setting. */ |
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NameID nameIndex; /* The name table index for the setting's name. */ |
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public: |
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DEFINE_SIZE_STATIC (4); |
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}; |
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struct FeatureName |
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{ |
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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 (likely (c->check_struct (this) && |
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(base+settingTable).sanitize (c, nSettings))); |
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} |
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enum { |
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Exclusive = 0x8000, /* If set, the feature settings are mutually exclusive. */ |
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NotDefault = 0x4000, /* If clear, then the setting with an index of 0 in |
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* the setting name array for this feature should |
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* be taken as the default for the feature |
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* (if one is required). If set, then bits 0-15 of this |
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* featureFlags field contain the index of the setting |
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* which is to be taken as the default. */ |
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IndexMask = 0x00FF /* If bits 30 and 31 are set, then these sixteen bits |
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* indicate the index of the setting in the setting name |
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* array for this feature which should be taken |
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* as the default. */ |
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}; |
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protected: |
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HBUINT16 feature; /* Feature type. */ |
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HBUINT16 nSettings; /* The number of records in the setting name array. */ |
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LOffsetTo<UnsizedArrayOf<SettingName> > |
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settingTable; /* Offset in bytes from the beginning of this table to |
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* this feature's setting name array. The actual type of |
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* record this offset refers to will depend on the |
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* exclusivity value, as described below. */ |
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HBUINT16 featureFlags; /* Single-bit flags associated with the feature type. */ |
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HBINT16 nameIndex; /* The name table index for the feature's name. |
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* This index has values greater than 255 and |
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* less than 32768. */ |
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public: |
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DEFINE_SIZE_STATIC (12); |
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}; |
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struct feat |
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{ |
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static const hb_tag_t tableTag = HB_AAT_TAG_feat; |
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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 (likely (c->check_struct (this) && |
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names.sanitize (c, featureNameCount, this))); |
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} |
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protected: |
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FixedVersion<>version; /* Version number of the feature name table |
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* (0x00010000 for the current version). */ |
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HBUINT16 featureNameCount; |
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/* The number of entries in the feature name array. */ |
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HBUINT16 reserved1; /* Reserved (set to zero). */ |
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HBUINT32 reserved2; /* Reserved (set to zero). */ |
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UnsizedArrayOf<FeatureName> |
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names; /* The feature name array. */ |
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public: |
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DEFINE_SIZE_STATIC (24); |
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}; |
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} /* namespace AAT */ |
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#endif /* HB_AAT_LAYOUT_FEAT_TABLE_HH */
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