400 lines
16 KiB
JavaScript
400 lines
16 KiB
JavaScript
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
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/* globals expect, it, describe, CFFCompiler, CFFParser, CFFIndex, CFFStrings,
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SEAC_ANALYSIS_ENABLED:true, Type1Parser, StringStream */
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'use strict';
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describe('font', function() {
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function hexDump(bytes) {
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var line = '';
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for (var i = 0, ii = bytes.length; i < ii; ++i) {
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var b = bytes[i].toString(16);
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if (b.length < 2) {
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b = '0' + b;
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}
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line += b.toString(16);
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}
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return line;
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}
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// This example font comes from the CFF spec:
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// http://www.adobe.com/content/dam/Adobe/en/devnet/font/pdfs/5176.CFF.pdf
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var exampleFont = '0100040100010101134142434445462b' +
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'54696d65732d526f6d616e000101011f' +
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'f81b00f81c02f81d03f819041c6f000d' +
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'fb3cfb6efa7cfa1605e911b8f1120003' +
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'01010813183030312e30303754696d65' +
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'7320526f6d616e54696d657300000002' +
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'010102030e0e7d99f92a99fb7695f773' +
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'8b06f79a93fc7c8c077d99f85695f75e' +
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'9908fb6e8cf87393f7108b09a70adf0b' +
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'f78e14';
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var fontData = [];
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for (var i = 0; i < exampleFont.length; i += 2) {
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var hex = exampleFont.substr(i, 2);
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fontData.push(parseInt(hex, 16));
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}
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var bytes = new Uint8Array(fontData);
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fontData = {
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getBytes: function() {
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return bytes;
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}
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};
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function bytesToString(bytesArray) {
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var str = '';
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for (var i = 0, ii = bytesArray.length; i < ii; i++) {
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str += String.fromCharCode(bytesArray[i]);
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}
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return str;
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}
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describe('CFFParser', function() {
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var parser = new CFFParser(fontData, {});
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var cff = parser.parse();
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it('parses header', function() {
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var header = cff.header;
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expect(header.major).toEqual(1);
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expect(header.minor).toEqual(0);
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expect(header.hdrSize).toEqual(4);
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expect(header.offSize).toEqual(1);
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});
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it('parses name index', function() {
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var names = cff.names;
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expect(names.length).toEqual(1);
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expect(names[0]).toEqual('ABCDEF+Times-Roman');
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});
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it('sanitizes name index', function() {
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var index = new CFFIndex();
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index.add(['['.charCodeAt(0), 'a'.charCodeAt(0)]);
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var names = parser.parseNameIndex(index);
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expect(names).toEqual(['_a']);
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index = new CFFIndex();
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var longName = [];
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for (var i = 0; i < 129; i++) {
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longName.push(0);
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}
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index.add(longName);
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names = parser.parseNameIndex(index);
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expect(names[0].length).toEqual(127);
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});
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it('parses string index', function() {
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var strings = cff.strings;
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expect(strings.count).toEqual(3);
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expect(strings.get(0)).toEqual('.notdef');
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expect(strings.get(391)).toEqual('001.007');
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});
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it('parses top dict', function() {
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var topDict = cff.topDict;
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// 391 version 392 FullName 393 FamilyName 389 Weight 28416 UniqueID
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// -168 -218 1000 898 FontBBox 94 CharStrings 45 102 Private
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expect(topDict.getByName('version')).toEqual(391);
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expect(topDict.getByName('FullName')).toEqual(392);
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expect(topDict.getByName('FamilyName')).toEqual(393);
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expect(topDict.getByName('Weight')).toEqual(389);
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expect(topDict.getByName('UniqueID')).toEqual(28416);
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expect(topDict.getByName('FontBBox')).toEqual([-168, -218, 1000, 898]);
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expect(topDict.getByName('CharStrings')).toEqual(94);
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expect(topDict.getByName('Private')).toEqual([45, 102]);
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});
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it('parses a CharString having cntrmask', function() {
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var bytes = new Uint8Array([0, 1, // count
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1, // offsetSize
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0, // offset[0]
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38, // end
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149, 149, 149, 149, 149, 149, 149, 149,
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149, 149, 149, 149, 149, 149, 149, 149,
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1, // hstem
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149, 149, 149, 149, 149, 149, 149, 149,
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149, 149, 149, 149, 149, 149, 149, 149,
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3, // vstem
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20, // cntrmask
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22, 22, // fail if misparsed as hmoveto
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14 // endchar
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]);
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parser.bytes = bytes;
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var charStrings = parser.parseCharStrings(0).charStrings;
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expect(charStrings.count).toEqual(1);
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// shoudn't be sanitized
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expect(charStrings.get(0).length).toEqual(38);
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});
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it('parses a CharString endchar with 4 args w/seac enabled', function() {
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var seacAnalysisState = SEAC_ANALYSIS_ENABLED;
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try {
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SEAC_ANALYSIS_ENABLED = true;
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var bytes = new Uint8Array([0, 1, // count
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1, // offsetSize
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0, // offset[0]
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237, 247, 22, 247, 72, 204, 247, 86, 14]);
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parser.bytes = bytes;
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var result = parser.parseCharStrings(0);
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expect(result.charStrings.count).toEqual(1);
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expect(result.charStrings.get(0).length).toEqual(1);
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expect(result.seacs.length).toEqual(1);
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expect(result.seacs[0].length).toEqual(4);
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expect(result.seacs[0][0]).toEqual(130);
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expect(result.seacs[0][1]).toEqual(180);
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expect(result.seacs[0][2]).toEqual(65);
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expect(result.seacs[0][3]).toEqual(194);
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} finally {
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SEAC_ANALYSIS_ENABLED = seacAnalysisState;
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}
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});
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it('parses a CharString endchar with 4 args w/seac disabled', function() {
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var seacAnalysisState = SEAC_ANALYSIS_ENABLED;
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try {
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SEAC_ANALYSIS_ENABLED = false;
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var bytes = new Uint8Array([0, 1, // count
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1, // offsetSize
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0, // offset[0]
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237, 247, 22, 247, 72, 204, 247, 86, 14]);
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parser.bytes = bytes;
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var result = parser.parseCharStrings(0);
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expect(result.charStrings.count).toEqual(1);
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expect(result.charStrings.get(0).length).toEqual(9);
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expect(result.seacs.length).toEqual(0);
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} finally {
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SEAC_ANALYSIS_ENABLED = seacAnalysisState;
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}
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});
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it('parses a CharString endchar no args', function() {
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var bytes = new Uint8Array([0, 1, // count
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1, // offsetSize
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0, // offset[0]
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14]);
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parser.bytes = bytes;
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var result = parser.parseCharStrings(0);
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expect(result.charStrings.count).toEqual(1);
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expect(result.charStrings.get(0)[0]).toEqual(14);
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expect(result.seacs.length).toEqual(0);
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});
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it('parses predefined charsets', function() {
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var charset = parser.parseCharsets(0, 0, null, true);
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expect(charset.predefined).toEqual(true);
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});
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it('parses charset format 0', function() {
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// The first three bytes make the offset large enough to skip predefined.
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var bytes = new Uint8Array([0x00, 0x00, 0x00,
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0x00, // format
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0x00, 0x02 // sid/cid
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]);
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parser.bytes = bytes;
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var charset = parser.parseCharsets(3, 2, new CFFStrings(), false);
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expect(charset.charset[1]).toEqual('exclam');
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// CID font
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var charset = parser.parseCharsets(3, 2, new CFFStrings(), true);
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expect(charset.charset[1]).toEqual(2);
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});
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it('parses charset format 1', function() {
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// The first three bytes make the offset large enough to skip predefined.
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var bytes = new Uint8Array([0x00, 0x00, 0x00,
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0x01, // format
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0x00, 0x08, // sid/cid start
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0x01 // sid/cid left
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]);
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parser.bytes = bytes;
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var charset = parser.parseCharsets(3, 2, new CFFStrings(), false);
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expect(charset.charset).toEqual(['.notdef', 'quoteright', 'parenleft']);
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// CID font
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var charset = parser.parseCharsets(3, 2, new CFFStrings(), true);
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expect(charset.charset).toEqual(['.notdef', 8, 9]);
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});
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it('parses charset format 2', function() {
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// format 2 is the same as format 1 but the left is card16
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// The first three bytes make the offset large enough to skip predefined.
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var bytes = new Uint8Array([0x00, 0x00, 0x00,
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0x02, // format
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0x00, 0x08, // sid/cid start
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0x00, 0x01 // sid/cid left
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]);
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parser.bytes = bytes;
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var charset = parser.parseCharsets(3, 2, new CFFStrings(), false);
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expect(charset.charset).toEqual(['.notdef', 'quoteright', 'parenleft']);
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// CID font
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var charset = parser.parseCharsets(3, 2, new CFFStrings(), true);
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expect(charset.charset).toEqual(['.notdef', 8, 9]);
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});
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it('parses encoding format 0', function() {
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// The first two bytes make the offset large enough to skip predefined.
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var bytes = new Uint8Array([0x00, 0x00,
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0x00, // format
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0x01, // count
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0x08 // start
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]);
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parser.bytes = bytes;
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var encoding = parser.parseEncoding(2, {}, new CFFStrings(), null);
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expect(encoding.encoding).toEqual({0x8: 1});
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});
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it('parses encoding format 1', function() {
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// The first two bytes make the offset large enough to skip predefined.
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var bytes = new Uint8Array([0x00, 0x00,
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0x01, // format
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0x01, // num ranges
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0x07, // range1 start
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0x01 // range2 left
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]);
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parser.bytes = bytes;
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var encoding = parser.parseEncoding(2, {}, new CFFStrings(), null);
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expect(encoding.encoding).toEqual({0x7: 0x01, 0x08: 0x02});
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});
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it('parses fdselect format 0', function() {
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var bytes = new Uint8Array([0x00, // format
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0x00, // gid: 0 fd: 0
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0x01 // gid: 1 fd: 1
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]);
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parser.bytes = bytes;
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var fdSelect = parser.parseFDSelect(0, 2);
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expect(fdSelect.fdSelect).toEqual([0, 1]);
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});
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it('parses fdselect format 3', function() {
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var bytes = new Uint8Array([0x03, // format
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0x00, 0x02, // range count
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0x00, 0x00, // first gid
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0x09, // font dict 1 id
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0x00, 0x02, // nex gid
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0x0a, // font dict 2 gid
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0x00, 0x04 // sentinel (last gid)
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]);
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parser.bytes = bytes;
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var fdSelect = parser.parseFDSelect(0, 2);
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expect(fdSelect.fdSelect).toEqual([9, 9, 0xa, 0xa]);
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});
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// TODO fdArray
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});
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describe('CFFCompiler', function() {
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it('encodes integers', function() {
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var c = new CFFCompiler();
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// all the examples from the spec
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expect(c.encodeInteger(0)).toEqual([0x8b]);
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expect(c.encodeInteger(100)).toEqual([0xef]);
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expect(c.encodeInteger(-100)).toEqual([0x27]);
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expect(c.encodeInteger(1000)).toEqual([0xfa, 0x7c]);
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expect(c.encodeInteger(-1000)).toEqual([0xfe, 0x7c]);
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expect(c.encodeInteger(10000)).toEqual([0x1c, 0x27, 0x10]);
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expect(c.encodeInteger(-10000)).toEqual([0x1c, 0xd8, 0xf0]);
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expect(c.encodeInteger(100000)).toEqual([0x1d, 0x00, 0x01, 0x86, 0xa0]);
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expect(c.encodeInteger(-100000)).toEqual([0x1d, 0xff, 0xfe, 0x79, 0x60]);
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});
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it('encodes floats', function() {
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var c = new CFFCompiler();
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expect(c.encodeFloat(-2.25)).toEqual([0x1e, 0xe2, 0xa2, 0x5f]);
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expect(c.encodeFloat(5e-11)).toEqual([0x1e, 0x5c, 0x11, 0xff]);
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});
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// TODO a lot more compiler tests
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});
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describe('Type1Parser', function() {
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it('splits tokens', function() {
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var stream = new StringStream('/BlueValues[-17 0]noaccess def');
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var parser = new Type1Parser(stream);
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expect(parser.getToken()).toEqual('/');
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expect(parser.getToken()).toEqual('BlueValues');
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expect(parser.getToken()).toEqual('[');
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expect(parser.getToken()).toEqual('-17');
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expect(parser.getToken()).toEqual('0');
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expect(parser.getToken()).toEqual(']');
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expect(parser.getToken()).toEqual('noaccess');
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expect(parser.getToken()).toEqual('def');
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expect(parser.getToken()).toEqual(null);
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});
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it('handles glued tokens', function() {
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var stream = new StringStream('dup/CharStrings');
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var parser = new Type1Parser(stream);
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expect(parser.getToken()).toEqual('dup');
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expect(parser.getToken()).toEqual('/');
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expect(parser.getToken()).toEqual('CharStrings');
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});
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it('ignores whitespace', function() {
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var stream = new StringStream('\nab c\t');
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var parser = new Type1Parser(stream);
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expect(parser.getToken()).toEqual('ab');
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expect(parser.getToken()).toEqual('c');
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});
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it('parses numbers', function() {
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var stream = new StringStream('123');
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var parser = new Type1Parser(stream);
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expect(parser.readNumber()).toEqual(123);
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});
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it('parses booleans', function() {
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var stream = new StringStream('true false');
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var parser = new Type1Parser(stream);
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expect(parser.readBoolean()).toEqual(1);
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expect(parser.readBoolean()).toEqual(0);
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});
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it('parses number arrays', function() {
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var stream = new StringStream('[1 2]');
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var parser = new Type1Parser(stream);
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expect(parser.readNumberArray()).toEqual([1, 2]);
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// Variation on spacing.
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var stream = new StringStream('[ 1 2 ]');
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parser = new Type1Parser(stream);
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expect(parser.readNumberArray()).toEqual([1, 2]);
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});
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it('skips comments', function() {
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var stream = new StringStream(
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'%!PS-AdobeFont-1.0: CMSY10 003.002\n' +
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'%%Title: CMSY10\n' +
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'%Version: 003.002\n' +
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'FontDirectory');
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var parser = new Type1Parser(stream);
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expect(parser.getToken()).toEqual('FontDirectory');
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});
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it('parses font program', function() {
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var stream = new StringStream(
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'/ExpansionFactor 99\n' +
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'/Subrs 1 array\n' +
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'dup 0 1 RD x noaccess put\n'+
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'end\n' +
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'/CharStrings 46 dict dup begin\n' +
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'/.notdef 1 RD x ND' + '\n' +
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'end');
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var parser = new Type1Parser(stream);
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var program = parser.extractFontProgram();
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expect(program.charstrings.length).toEqual(1);
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expect(program.properties.privateData.ExpansionFactor).toEqual(99);
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});
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it('parses font header font matrix', function() {
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var stream = new StringStream(
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'/FontMatrix [0.001 0 0 0.001 0 0 ]readonly def\n');
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var parser = new Type1Parser(stream);
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var props = {};
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var program = parser.extractFontHeader(props);
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expect(props.fontMatrix).toEqual([0.001, 0, 0, 0.001, 0, 0]);
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});
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it('parses font header encoding', function() {
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var stream = new StringStream(
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'/Encoding 256 array\n' +
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'0 1 255 {1 index exch /.notdef put} for\n' +
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'dup 33 /arrowright put\n' +
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'readonly def\n');
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var parser = new Type1Parser(stream);
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var props = { overridableEncoding: true };
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var program = parser.extractFontHeader(props);
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expect(props.builtInEncoding[33]).toEqual('arrowright');
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});
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});
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});
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