[OTLayout] Add FeatureParamsCharacterVariants struct
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@ -329,6 +329,48 @@ struct FeatureParamsStylisticSet
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DEFINE_SIZE_STATIC (4);
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};
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struct FeatureParamsCharacterVariants
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{
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inline bool sanitize (hb_sanitize_context_t *c) {
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TRACE_SANITIZE (this);
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return TRACE_RETURN (c->check_struct (this) &&
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characters.sanitize (c));
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}
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/* TODO: This is made private since we don't have the facilities in
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* FeatureParams to correctly sanitize this. */
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private:
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USHORT format; /* Format number is set to 0. */
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USHORT featUILableNameID; /* The ‘name’ table name ID that
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* specifies a string (or strings,
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* for multiple languages) for a
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* user-interface label for this
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* feature. (May be NULL.) */
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USHORT featUITooltipTextNameID;/* The ‘name’ table name ID that
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* specifies a string (or strings,
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* for multiple languages) that an
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* application can use for tooltip
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* text for this feature. (May be
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* NULL.) */
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USHORT sampleTextNameID; /* The ‘name’ table name ID that
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* specifies sample text that
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* illustrates the effect of this
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* feature. (May be NULL.) */
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USHORT numNamedParameters; /* Number of named parameters. (May
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* be zero.) */
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USHORT firstParamUILabelNameID;/* The first ‘name’ table name ID
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* used to specify strings for
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* user-interface labels for the
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* feature parameters. (Must be zero
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* if numParameters is zero.) */
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ArrayOf<UINT24>
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characters; /* Array of the Unicode Scalar Value
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* of the characters for which this
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* feature provides glyph variants.
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* (May be zero.) */
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public:
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DEFINE_SIZE_ARRAY (14, characters);
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};
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struct FeatureParams
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{
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/* Note:
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@ -339,6 +381,9 @@ struct FeatureParams
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* subtable possible. This may nuke a possibly valid subtable if it's unfortunate
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* enough to happen at the very end of the GSUB/GPOS table. But that's very
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* unlikely (I hope!).
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*
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* When we fully implement FeatureParamsCharacterVariants, we should fix this
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* shortcoming...
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*/
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inline bool sanitize (hb_sanitize_context_t *c) {
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@ -349,8 +394,9 @@ struct FeatureParams
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union {
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FeatureParamsSize size;
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FeatureParamsStylisticSet stylisticSet;
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FeatureParamsCharacterVariants characterVariants;
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} u;
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DEFINE_SIZE_STATIC (10);
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DEFINE_SIZE_STATIC (17);
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};
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struct Feature
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