63 lines
1.9 KiB
Plaintext
63 lines
1.9 KiB
Plaintext
// The `GDEF` table contains various glyph properties
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// https://docs.microsoft.com/en-us/typography/opentype/spec/gdef
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import check from '../check';
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import { Parser } from '../parse';
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var attachList = function() {
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return {
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coverage: this.parsePointer(Parser.coverage),
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attachPoints: this.parseList(Parser.pointer(Parser.uShortList))
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};
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};
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var caretValue = function() {
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var format = this.parseUShort();
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check.argument(format === 1 || format === 2 || format === 3,
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'Unsupported CaretValue table version.');
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if (format === 1) {
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return { coordinate: this.parseShort() };
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} else if (format === 2) {
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return { pointindex: this.parseShort() };
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} else if (format === 3) {
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// Device / Variation Index tables unsupported
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return { coordinate: this.parseShort() };
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}
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};
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var ligGlyph = function() {
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return this.parseList(Parser.pointer(caretValue));
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};
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var ligCaretList = function() {
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return {
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coverage: this.parsePointer(Parser.coverage),
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ligGlyphs: this.parseList(Parser.pointer(ligGlyph))
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};
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};
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var markGlyphSets = function() {
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this.parseUShort(); // Version
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return this.parseList(Parser.pointer(Parser.coverage));
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};
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function parseGDEFTable(data, start) {
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start = start || 0;
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const p = new Parser(data, start);
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const tableVersion = p.parseVersion(1);
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check.argument(tableVersion === 1 || tableVersion === 1.2 || tableVersion === 1.3,
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'Unsupported GDEF table version.');
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var gdef = {
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version: tableVersion,
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classDef: p.parsePointer(Parser.classDef),
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attachList: p.parsePointer(attachList),
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ligCaretList: p.parsePointer(ligCaretList),
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markAttachClassDef: p.parsePointer(Parser.classDef)
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};
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if (tableVersion >= 1.2) {
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gdef.markGlyphSets = p.parsePointer(markGlyphSets);
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}
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return gdef;
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}
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export default { parse: parseGDEFTable };
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