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import TTFFont from './TTFFont';
import WOFFDirectory from './tables/WOFFDirectory';
import tables from './tables';
import inflate from 'tiny-inflate';
import r from '@foliojs-fork/restructure';
export default class WOFFFont extends TTFFont {
static probe(buffer) {
return buffer.toString('ascii', 0, 4) === 'wOFF';
}
_decodeDirectory() {
this.directory = WOFFDirectory.decode(this.stream, { _startOffset: 0 });
}
_getTableStream(tag) {
let table = this.directory.tables[tag];
if (table) {
this.stream.pos = table.offset;
if (table.compLength < table.length) {
this.stream.pos += 2; // skip deflate header
let outBuffer = Buffer.alloc(table.length);
let buf = inflate(this.stream.readBuffer(table.compLength - 2), outBuffer);
return new r.DecodeStream(buf);
} else {
return this.stream;
}
}
return null;
}
}