405 lines
15 KiB
JavaScript
405 lines
15 KiB
JavaScript
/* Copyright 2017 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import {
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CFFCompiler, CFFParser, CFFStrings
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} from '../../src/core/cff_parser';
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import { SEAC_ANALYSIS_ENABLED } from '../../src/core/fonts';
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import { Stream } from '../../src/core/stream';
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describe('CFFParser', function() {
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function createWithNullProto(obj) {
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var result = Object.create(null);
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for (var i in obj) {
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result[i] = obj[i];
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}
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return result;
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}
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// Stub that returns `0` for any privateDict key.
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var privateDictStub = {
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getByName(name) {
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return 0;
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},
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};
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var fontData, parser, cff;
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beforeAll(function (done) {
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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 fontArr = [];
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for (var i = 0, ii = exampleFont.length; i < ii; i += 2) {
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var hex = exampleFont.substr(i, 2);
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fontArr.push(parseInt(hex, 16));
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}
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fontData = new Stream(fontArr);
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done();
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});
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afterAll(function () {
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fontData = null;
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});
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beforeEach(function (done) {
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parser = new CFFParser(fontData, {}, SEAC_ANALYSIS_ENABLED);
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cff = parser.parse();
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done();
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});
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afterEach(function (done) {
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parser = cff = null;
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done();
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});
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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('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('refuses to add topDict key with invalid value (bug 1068432)',
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function () {
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var topDict = cff.topDict;
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var defaultValue = topDict.getByName('UnderlinePosition');
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topDict.setByKey(/* [12, 3] = */ 3075, [NaN]);
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expect(topDict.getByName('UnderlinePosition')).toEqual(defaultValue);
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});
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it('ignores reserved commands in parseDict, and refuses to add privateDict ' +
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'keys with invalid values (bug 1308536)', function () {
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var bytes = new Uint8Array([
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64, 39, 31, 30, 252, 114, 137, 115, 79, 30, 197, 119, 2, 99, 127, 6
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]);
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parser.bytes = bytes;
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var topDict = cff.topDict;
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topDict.setByName('Private', [bytes.length, 0]);
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var parsePrivateDict = function () {
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parser.parsePrivateDict(topDict);
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};
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expect(parsePrivateDict).not.toThrow();
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var privateDict = topDict.privateDict;
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expect(privateDict.getByName('BlueValues')).toBeNull();
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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 charStringsIndex = parser.parseIndex(0).obj;
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var charStrings = parser.parseCharStrings({
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charStrings: charStringsIndex,
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privateDict: privateDictStub,
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}).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 parser = new CFFParser(fontData, {},
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/* seacAnalysisEnabled = */ true);
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parser.parse(); // cff
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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 charStringsIndex = parser.parseIndex(0).obj;
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var result = parser.parseCharStrings({
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charStrings: charStringsIndex,
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privateDict: privateDictStub,
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});
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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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});
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it('parses a CharString endchar with 4 args w/seac disabled', function() {
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var parser = new CFFParser(fontData, {},
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/* seacAnalysisEnabled = */ false);
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parser.parse(); // cff
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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 charStringsIndex = parser.parseIndex(0).obj;
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var result = parser.parseCharStrings({
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charStrings: charStringsIndex,
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privateDict: privateDictStub,
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});
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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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});
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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 charStringsIndex = parser.parseIndex(0).obj;
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var result = parser.parseCharStrings({
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charStrings: charStringsIndex,
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privateDict: privateDictStub,
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});
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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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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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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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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(createWithNullProto({ 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(
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createWithNullProto({ 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.slice();
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var fdSelect = parser.parseFDSelect(0, 2);
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expect(fdSelect.fdSelect).toEqual([0, 1]);
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expect(fdSelect.raw).toEqual(bytes);
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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, // next gid
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0x0a, // font dict 2 id
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0x00, 0x04 // sentinel (last gid)
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]);
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parser.bytes = bytes.slice();
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var fdSelect = parser.parseFDSelect(0, 4);
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expect(fdSelect.fdSelect).toEqual([9, 9, 0xa, 0xa]);
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expect(fdSelect.raw).toEqual(bytes);
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});
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it('parses invalid fdselect format 3 (bug 1146106)', function() {
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var bytes = new Uint8Array([0x03, // format
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0x00, 0x02, // range count
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0x00, 0x01, // first gid (invalid)
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0x09, // font dict 1 id
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0x00, 0x02, // next gid
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0x0a, // font dict 2 id
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0x00, 0x04 // sentinel (last gid)
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]);
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parser.bytes = bytes.slice();
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var fdSelect = parser.parseFDSelect(0, 4);
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expect(fdSelect.fdSelect).toEqual([9, 9, 0xa, 0xa]);
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bytes[3] = bytes[4] = 0x00; // The adjusted first range, first gid.
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expect(fdSelect.raw).toEqual(bytes);
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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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function testParser(bytes) {
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bytes = new Uint8Array(bytes);
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return new CFFParser({
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getBytes: () => {
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return bytes;
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},
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}, {}, SEAC_ANALYSIS_ENABLED);
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}
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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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it('sanitizes name index', function() {
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var c = new CFFCompiler();
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var nameIndexCompiled = c.compileNameIndex(['[a']);
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var parser = testParser(nameIndexCompiled);
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var nameIndex = parser.parseIndex(0);
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var names = parser.parseNameIndex(nameIndex.obj);
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expect(names).toEqual(['_a']);
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var longName = '';
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for (var i = 0; i < 129; i++) {
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longName += '_';
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}
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nameIndexCompiled = c.compileNameIndex([longName]);
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parser = testParser(nameIndexCompiled);
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nameIndex = parser.parseIndex(0);
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names = parser.parseNameIndex(nameIndex.obj);
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expect(names[0].length).toEqual(127);
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});
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// TODO a lot more compiler tests
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});
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