typedef RecordListOf<Script> ScriptList;
+
+/* http://www.microsoft.com/typography/otspec/features_pt.htm#size */
struct FeatureParamsSize
{
inline bool sanitize (hb_sanitize_context_t *c) {
return TRACE_RETURN (c->check_struct (this));
}
- USHORT params[5];
+ USHORT designSize; /* Represents the design size in 720/inch
+ * units (decipoints). The design size entry
+ * must be non-zero. When there is a design
+ * size but no recommended size range, the
+ * rest of the array will consist of zeros. */
+ USHORT subfamilyID; /* Has no independent meaning, but serves
+ * as an identifier that associates fonts
+ * in a subfamily. All fonts which share a
+ * Preferred or Font Family name and which
+ * differ only by size range shall have the
+ * same subfamily value, and no fonts which
+ * differ in weight or style shall have the
+ * same subfamily value. If this value is
+ * zero, the remaining fields in the array
+ * will be ignored. */
+ USHORT subfamilyNameID;/* If the preceding value is non-zero, this
+ * value must be set in the range 256 - 32767
+ * (inclusive). It records the value of a
+ * field in the name table, which must
+ * contain English-language strings encoded
+ * in Windows Unicode and Macintosh Roman,
+ * and may contain additional strings
+ * localized to other scripts and languages.
+ * Each of these strings is the name an
+ * application should use, in combination
+ * with the family name, to represent the
+ * subfamily in a menu. Applications will
+ * choose the appropriate version based on
+ * their selection criteria. */
+ USHORT rangeStart; /* Large end of the recommended usage range
+ * (inclusive), stored in 720/inch units
+ * (decipoints). */
+ USHORT rangeEnd; /* Small end of the recommended usage range
+ (exclusive), stored in 720/inch units
+ * (decipoints). */
public:
DEFINE_SIZE_STATIC (10);
};
+/* http://www.microsoft.com/typography/otspec/features_pt.htm#ssxx */
+struct FeatureParamsStylisticSet
+{
+ inline bool sanitize (hb_sanitize_context_t *c) {
+ TRACE_SANITIZE (this);
+ /* Right now minorVersion is at zero. Which means, any table supports
+ * the uiNameID field. */
+ return TRACE_RETURN (c->check_struct (this));
+ }
+
+ USHORT minorVersion; /* (set to 0): This corresponds to a “minor”
+ * version number. Additional data may be
+ * added to the end of this Feature Parameters
+ * table in the future. */
+
+ USHORT uiNameID; /* The 'name' table name ID that specifies a
+ * string (or strings, for multiple languages)
+ * for a user-interface label for this
+ * feature. The values of uiLabelNameId and
+ * sampleTextNameId are expected to be in the
+ * font-specific name ID range (256-32767),
+ * though that is not a requirement in this
+ * Feature Parameters specification. The
+ * user-interface label for the feature can
+ * be provided in multiple languages. An
+ * English string should be included as a
+ * fallback. The string should be kept to a
+ * minimal length to fit comfortably with
+ * different application interfaces. */
+ public:
+ DEFINE_SIZE_STATIC (4);
+};
+
struct FeatureParams
{
- /* Note: currently the only feature with params is 'size', so we hardcode
- * the length of the table to that of the FeatureParamsSize. */
+ /* Note:
+ *
+ * FeatureParams structures unfortunately don't have a generic length argument,
+ * so their length depends on the feature name / requested use. We don't have
+ * that information at sanitize time. As such, we sanitize for the longest
+ * subtable possible. This may nuke a possibly valid subtable if it's unfortunate
+ * enough to happen at the very end of the GSUB/GPOS table. But that's very
+ * unlikely (I hope!).
+ */
inline bool sanitize (hb_sanitize_context_t *c) {
TRACE_SANITIZE (this);
}
union {
- FeatureParamsSize size;
+ FeatureParamsSize size;
+ FeatureParamsStylisticSet stylisticSet;
} u;
DEFINE_SIZE_STATIC (10);
};
}
hb_bool_t
-hb_ot_layout_get_size_params (hb_face_t *face,
- uint16_t *data /* OUT, 5 items */)
+hb_ot_layout_get_size_params (hb_face_t *face,
+ unsigned int *design_size, /* OUT. May be NULL */
+ unsigned int *subfamily_id, /* OUT. May be NULL */
+ unsigned int *subfamily_name_id, /* OUT. May be NULL */
+ unsigned int *range_start, /* OUT. May be NULL */
+ unsigned int *range_end /* OUT. May be NULL */)
{
const OT::GPOS &gpos = _get_gpos (face);
if (HB_TAG ('s','i','z','e') == gpos.get_feature_tag (i))
{
const OT::Feature &f = gpos.get_feature (i);
- const OT::FeatureParams ¶ms = f.get_feature_params ();
+ const OT::FeatureParamsSize ¶ms = f.get_feature_params ().u.size;
- for (unsigned int i = 0; i < 5; i++)
- data[i] = params.u.size.params[i];
+#define PARAM(a, A) if (a) *a = params.A
+ PARAM (design_size, designSize);
+ PARAM (subfamily_id, subfamilyID);
+ PARAM (subfamily_name_id, subfamilyNameID);
+ PARAM (range_start, rangeStart);
+ PARAM (range_end, rangeEnd);
+#undef PARAM
return true;
}
}
- for (unsigned int i = 0; i < 5; i++)
- data[i] = 0;
+#define PARAM(a, A) if (a) *a = 0
+ PARAM (design_size, designSize);
+ PARAM (subfamily_id, subfamilyID);
+ PARAM (subfamily_name_id, subfamilyNameID);
+ PARAM (range_start, rangeStart);
+ PARAM (range_end, rangeEnd);
+#undef PARAM
return false;
}
projects / platform / upstream / libHarfBuzzSharp.git / commitdiff