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gtk2/gtk/open-type-layout.h
Matthias Clasen d0894b2786 fontchooser: Some OpenType improvements 
Work harder to find examples for char variation
features, and pull the feature labels out of
the font if possible. This lets us show
meaningful names like "Localised @ and & symbols"
instead of "Stylistic Set 7" or even "ss07".
2022-07-03 07:38:24 -04:00

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/* Registered OpenType layout tags, see
* https://www.microsoft.com/typography/otspec/featuretags.htm
*/
typedef struct {
unsigned int tag;
const char *name;
} NamedTag;
#define MAKE_TAG(a,b,c,d) (unsigned int)(((a) << 24) | ((b) << 16) | ((c) << 8) | (d))
/* These don't include ss01 - ss19 and cv01 - cv99 */
static NamedTag open_type_layout_features[] = {
{ MAKE_TAG('a','a','l','t'), NC_("OpenType layout", "Access All Alternates") },
{ MAKE_TAG('a','b','v','f'), NC_("OpenType layout", "Above-base Forms") },
{ MAKE_TAG('a','b','v','m'), NC_("OpenType layout", "Above-base Mark Positioning") },
{ MAKE_TAG('a','b','v','s'), NC_("OpenType layout", "Above-base Substitutions") },
{ MAKE_TAG('a','f','r','c'), NC_("OpenType layout", "Alternative Fractions") },
{ MAKE_TAG('a','k','h','n'), NC_("OpenType layout", "Akhands") },
{ MAKE_TAG('b','l','w','f'), NC_("OpenType layout", "Below-base Forms") },
{ MAKE_TAG('b','l','w','m'), NC_("OpenType layout", "Below-base Mark Positioning") },
{ MAKE_TAG('b','l','w','s'), NC_("OpenType layout", "Below-base Substitutions") },
{ MAKE_TAG('c','a','l','t'), NC_("OpenType layout", "Contextual Alternates") },
{ MAKE_TAG('c','a','s','e'), NC_("OpenType layout", "Case-Sensitive Forms") },
{ MAKE_TAG('c','c','m','p'), NC_("OpenType layout", "Glyph Composition / Decomposition") },
{ MAKE_TAG('c','f','a','r'), NC_("OpenType layout", "Conjunct Form After Ro") },
{ MAKE_TAG('c','j','c','t'), NC_("OpenType layout", "Conjunct Forms") },
{ MAKE_TAG('c','l','i','g'), NC_("OpenType layout", "Contextual Ligatures") },
{ MAKE_TAG('c','p','c','t'), NC_("OpenType layout", "Centered CJK Punctuation") },
{ MAKE_TAG('c','p','s','p'), NC_("OpenType layout", "Capital Spacing") },
{ MAKE_TAG('c','s','w','h'), NC_("OpenType layout", "Contextual Swash") },
{ MAKE_TAG('c','u','r','s'), NC_("OpenType layout", "Cursive Positioning") },
{ MAKE_TAG('c','2','p','c'), NC_("OpenType layout", "Petite Capitals From Capitals") },
{ MAKE_TAG('c','2','s','c'), NC_("OpenType layout", "Small Capitals From Capitals") },
{ MAKE_TAG('d','i','s','t'), NC_("OpenType layout", "Distances") },
{ MAKE_TAG('d','l','i','g'), NC_("OpenType layout", "Discretionary Ligatures") },
{ MAKE_TAG('d','n','o','m'), NC_("OpenType layout", "Denominators") },
{ MAKE_TAG('d','t','l','s'), NC_("OpenType layout", "Dotless Forms") },
{ MAKE_TAG('e','x','p','t'), NC_("OpenType layout", "Expert Forms") },
{ MAKE_TAG('f','a','l','t'), NC_("OpenType layout", "Final Glyph on Line Alternates") },
{ MAKE_TAG('f','i','n','2'), NC_("OpenType layout", "Terminal Forms #2") },
{ MAKE_TAG('f','i','n','3'), NC_("OpenType layout", "Terminal Forms #3") },
{ MAKE_TAG('f','i','n','a'), NC_("OpenType layout", "Terminal Forms") },
{ MAKE_TAG('f','l','a','c'), NC_("OpenType layout", "Flattened accent forms") },
{ MAKE_TAG('f','r','a','c'), NC_("OpenType layout", "Fractions") },
{ MAKE_TAG('f','w','i','d'), NC_("OpenType layout", "Full Widths") },
{ MAKE_TAG('h','a','l','f'), NC_("OpenType layout", "Half Forms") },
{ MAKE_TAG('h','a','l','n'), NC_("OpenType layout", "Halant Forms") },
{ MAKE_TAG('h','a','l','t'), NC_("OpenType layout", "Alternate Half Widths") },
{ MAKE_TAG('h','i','s','t'), NC_("OpenType layout", "Historical Forms") },
{ MAKE_TAG('h','k','n','a'), NC_("OpenType layout", "Horizontal Kana Alternates") },
{ MAKE_TAG('h','l','i','g'), NC_("OpenType layout", "Historical Ligatures") },
{ MAKE_TAG('h','n','g','l'), NC_("OpenType layout", "Hangul") },
{ MAKE_TAG('h','o','j','o'), NC_("OpenType layout", "Hojo Kanji Forms") },
{ MAKE_TAG('h','w','i','d'), NC_("OpenType layout", "Half Widths") },
{ MAKE_TAG('i','n','i','t'), NC_("OpenType layout", "Initial Forms") },
{ MAKE_TAG('i','s','o','l'), NC_("OpenType layout", "Isolated Forms") },
{ MAKE_TAG('i','t','a','l'), NC_("OpenType layout", "Italics") },
{ MAKE_TAG('j','a','l','t'), NC_("OpenType layout", "Justification Alternates") },
{ MAKE_TAG('j','p','7','8'), NC_("OpenType layout", "JIS78 Forms") },
{ MAKE_TAG('j','p','8','3'), NC_("OpenType layout", "JIS83 Forms") },
{ MAKE_TAG('j','p','9','0'), NC_("OpenType layout", "JIS90 Forms") },
{ MAKE_TAG('j','p','0','4'), NC_("OpenType layout", "JIS2004 Forms") },
{ MAKE_TAG('k','e','r','n'), NC_("OpenType layout", "Kerning") },
{ MAKE_TAG('l','f','b','d'), NC_("OpenType layout", "Left Bounds") },
{ MAKE_TAG('l','i','g','a'), NC_("OpenType layout", "Standard Ligatures") },
{ MAKE_TAG('l','j','m','o'), NC_("OpenType layout", "Leading Jamo Forms") },
{ MAKE_TAG('l','n','u','m'), NC_("OpenType layout", "Lining Figures") },
{ MAKE_TAG('l','o','c','l'), NC_("OpenType layout", "Localized Forms") },
{ MAKE_TAG('l','t','r','a'), NC_("OpenType layout", "Left-to-right alternates") },
{ MAKE_TAG('l','t','r','m'), NC_("OpenType layout", "Left-to-right mirrored forms") },
{ MAKE_TAG('m','a','r','k'), NC_("OpenType layout", "Mark Positioning") },
{ MAKE_TAG('m','e','d','2'), NC_("OpenType layout", "Medial Forms #2") },
{ MAKE_TAG('m','e','d','i'), NC_("OpenType layout", "Medial Forms") },
{ MAKE_TAG('m','g','r','k'), NC_("OpenType layout", "Mathematical Greek") },
{ MAKE_TAG('m','k','m','k'), NC_("OpenType layout", "Mark to Mark Positioning") },
{ MAKE_TAG('m','s','e','t'), NC_("OpenType layout", "Mark Positioning via Substitution") },
{ MAKE_TAG('n','a','l','t'), NC_("OpenType layout", "Alternate Annotation Forms") },
{ MAKE_TAG('n','l','c','k'), NC_("OpenType layout", "NLC Kanji Forms") },
{ MAKE_TAG('n','u','k','t'), NC_("OpenType layout", "Nukta Forms") },
{ MAKE_TAG('n','u','m','r'), NC_("OpenType layout", "Numerators") },
{ MAKE_TAG('o','n','u','m'), NC_("OpenType layout", "Oldstyle Figures") },
{ MAKE_TAG('o','p','b','d'), NC_("OpenType layout", "Optical Bounds") },
{ MAKE_TAG('o','r','d','n'), NC_("OpenType layout", "Ordinals") },
{ MAKE_TAG('o','r','n','m'), NC_("OpenType layout", "Ornaments") },
{ MAKE_TAG('p','a','l','t'), NC_("OpenType layout", "Proportional Alternate Widths") },
{ MAKE_TAG('p','c','a','p'), NC_("OpenType layout", "Petite Capitals") },
{ MAKE_TAG('p','k','n','a'), NC_("OpenType layout", "Proportional Kana") },
{ MAKE_TAG('p','n','u','m'), NC_("OpenType layout", "Proportional Figures") },
{ MAKE_TAG('p','r','e','f'), NC_("OpenType layout", "Pre-Base Forms") },
{ MAKE_TAG('p','r','e','s'), NC_("OpenType layout", "Pre-base Substitutions") },
{ MAKE_TAG('p','s','t','f'), NC_("OpenType layout", "Post-base Forms") },
{ MAKE_TAG('p','s','t','s'), NC_("OpenType layout", "Post-base Substitutions") },
{ MAKE_TAG('p','w','i','d'), NC_("OpenType layout", "Proportional Widths") },
{ MAKE_TAG('q','w','i','d'), NC_("OpenType layout", "Quarter Widths") },
{ MAKE_TAG('r','a','n','d'), NC_("OpenType layout", "Randomize") },
{ MAKE_TAG('r','c','l','t'), NC_("OpenType layout", "Required Contextual Alternates") },
{ MAKE_TAG('r','k','r','f'), NC_("OpenType layout", "Rakar Forms") },
{ MAKE_TAG('r','l','i','g'), NC_("OpenType layout", "Required Ligatures") },
{ MAKE_TAG('r','p','h','f'), NC_("OpenType layout", "Reph Forms") },
{ MAKE_TAG('r','t','b','d'), NC_("OpenType layout", "Right Bounds") },
{ MAKE_TAG('r','t','l','a'), NC_("OpenType layout", "Right-to-left alternates") },
{ MAKE_TAG('r','t','l','m'), NC_("OpenType layout", "Right-to-left mirrored forms") },
{ MAKE_TAG('r','u','b','y'), NC_("OpenType layout", "Ruby Notation Forms") },
{ MAKE_TAG('r','v','r','n'), NC_("OpenType layout", "Required Variation Alternates") },
{ MAKE_TAG('s','a','l','t'), NC_("OpenType layout", "Stylistic Alternates") },
{ MAKE_TAG('s','i','n','f'), NC_("OpenType layout", "Scientific Inferiors") },
{ MAKE_TAG('s','i','z','e'), NC_("OpenType layout", "Optical size") },
{ MAKE_TAG('s','m','c','p'), NC_("OpenType layout", "Small Capitals") },
{ MAKE_TAG('s','m','p','l'), NC_("OpenType layout", "Simplified Forms") },
{ MAKE_TAG('s','s','t','y'), NC_("OpenType layout", "Math script style alternates") },
{ MAKE_TAG('s','t','c','h'), NC_("OpenType layout", "Stretching Glyph Decomposition") },
{ MAKE_TAG('s','u','b','s'), NC_("OpenType layout", "Subscript") },
{ MAKE_TAG('s','u','p','s'), NC_("OpenType layout", "Superscript") },
{ MAKE_TAG('s','w','s','h'), NC_("OpenType layout", "Swash") },
{ MAKE_TAG('t','i','t','l'), NC_("OpenType layout", "Titling") },
{ MAKE_TAG('t','j','m','o'), NC_("OpenType layout", "Trailing Jamo Forms") },
{ MAKE_TAG('t','n','a','m'), NC_("OpenType layout", "Traditional Name Forms") },
{ MAKE_TAG('t','n','u','m'), NC_("OpenType layout", "Tabular Figures") },
{ MAKE_TAG('t','r','a','d'), NC_("OpenType layout", "Traditional Forms") },
{ MAKE_TAG('t','w','i','d'), NC_("OpenType layout", "Third Widths") },
{ MAKE_TAG('u','n','i','c'), NC_("OpenType layout", "Unicase") },
{ MAKE_TAG('v','a','l','t'), NC_("OpenType layout", "Alternate Vertical Metrics") },
{ MAKE_TAG('v','a','t','u'), NC_("OpenType layout", "Vattu Variants") },
{ MAKE_TAG('v','e','r','t'), NC_("OpenType layout", "Vertical Writing") },
{ MAKE_TAG('v','h','a','l'), NC_("OpenType layout", "Alternate Vertical Half Metrics") },
{ MAKE_TAG('v','j','m','o'), NC_("OpenType layout", "Vowel Jamo Forms") },
{ MAKE_TAG('v','k','n','a'), NC_("OpenType layout", "Vertical Kana Alternates") },
{ MAKE_TAG('v','k','r','n'), NC_("OpenType layout", "Vertical Kerning") },
{ MAKE_TAG('v','p','a','l'), NC_("OpenType layout", "Proportional Alternate Vertical Metrics") },
{ MAKE_TAG('v','r','t','2'), NC_("OpenType layout", "Vertical Alternates and Rotation") },
{ MAKE_TAG('v','r','t','r'), NC_("OpenType layout", "Vertical Alternates for Rotation") },
{ MAKE_TAG('z','e','r','o'), NC_("OpenType layout", "Slashed Zero") },
};
#undef MAKE_TAG
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