/* Copyright 2017 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import {
CFFCompiler, CFFParser, CFFStrings
} from '../../src/core/cff_parser';
import { SEAC_ANALYSIS_ENABLED } from '../../src/core/fonts';
import { Stream } from '../../src/core/stream';
describe('CFFParser', function() {
function createWithNullProto(obj) {
var result = Object.create(null);
for (var i in obj) {
result[i] = obj[i];
}
return result;
}
// Stub that returns `0` for any privateDict key.
var privateDictStub = {
getByName(name) {
return 0;
},
};
var fontData, parser, cff;
beforeAll(function (done) {
// This example font comes from the CFF spec:
// http://www.adobe.com/content/dam/Adobe/en/devnet/font/pdfs/5176.CFF.pdf
var exampleFont = '0100040100010101134142434445462b' +
'54696d65732d526f6d616e000101011f' +
'f81b00f81c02f81d03f819041c6f000d' +
'fb3cfb6efa7cfa1605e911b8f1120003' +
'01010813183030312e30303754696d65' +
'7320526f6d616e54696d657300000002' +
'010102030e0e7d99f92a99fb7695f773' +
'8b06f79a93fc7c8c077d99f85695f75e' +
'9908fb6e8cf87393f7108b09a70adf0b' +
'f78e14';
var fontArr = [];
for (var i = 0, ii = exampleFont.length; i < ii; i += 2) {
var hex = exampleFont.substr(i, 2);
fontArr.push(parseInt(hex, 16));
}
fontData = new Stream(fontArr);
done();
});
afterAll(function () {
fontData = null;
});
beforeEach(function (done) {
parser = new CFFParser(fontData, {}, SEAC_ANALYSIS_ENABLED);
cff = parser.parse();
done();
});
afterEach(function (done) {
parser = cff = null;
done();
});
it('parses header', function() {
var header = cff.header;
expect(header.major).toEqual(1);
expect(header.minor).toEqual(0);
expect(header.hdrSize).toEqual(4);
expect(header.offSize).toEqual(1);
});
it('parses name index', function() {
var names = cff.names;
expect(names.length).toEqual(1);
expect(names[0]).toEqual('ABCDEF+Times-Roman');
});
it('parses string index', function() {
var strings = cff.strings;
expect(strings.count).toEqual(3);
expect(strings.get(0)).toEqual('.notdef');
expect(strings.get(391)).toEqual('001.007');
});
it('parses top dict', function() {
var topDict = cff.topDict;
// 391 version 392 FullName 393 FamilyName 389 Weight 28416 UniqueID
// -168 -218 1000 898 FontBBox 94 CharStrings 45 102 Private
expect(topDict.getByName('version')).toEqual(391);
expect(topDict.getByName('FullName')).toEqual(392);
expect(topDict.getByName('FamilyName')).toEqual(393);
expect(topDict.getByName('Weight')).toEqual(389);
expect(topDict.getByName('UniqueID')).toEqual(28416);
expect(topDict.getByName('FontBBox')).toEqual([-168, -218, 1000, 898]);
expect(topDict.getByName('CharStrings')).toEqual(94);
expect(topDict.getByName('Private')).toEqual([45, 102]);
});
it('refuses to add topDict key with invalid value (bug 1068432)',
function () {
var topDict = cff.topDict;
var defaultValue = topDict.getByName('UnderlinePosition');
topDict.setByKey(/* [12, 3] = */ 3075, [NaN]);
expect(topDict.getByName('UnderlinePosition')).toEqual(defaultValue);
});
it('ignores reserved commands in parseDict, and refuses to add privateDict ' +
'keys with invalid values (bug 1308536)', function () {
var bytes = new Uint8Array([
64, 39, 31, 30, 252, 114, 137, 115, 79, 30, 197, 119, 2, 99, 127, 6
]);
parser.bytes = bytes;
var topDict = cff.topDict;
topDict.setByName('Private', [bytes.length, 0]);
var parsePrivateDict = function () {
parser.parsePrivateDict(topDict);
};
expect(parsePrivateDict).not.toThrow();
var privateDict = topDict.privateDict;
expect(privateDict.getByName('BlueValues')).toBeNull();
});
it('parses a CharString having cntrmask', function() {
var bytes = new Uint8Array([0, 1, // count
1, // offsetSize
0, // offset[0]
38, // end
149, 149, 149, 149, 149, 149, 149, 149,
149, 149, 149, 149, 149, 149, 149, 149,
1, // hstem
149, 149, 149, 149, 149, 149, 149, 149,
149, 149, 149, 149, 149, 149, 149, 149,
3, // vstem
20, // cntrmask
22, 22, // fail if misparsed as hmoveto
14 // endchar
]);
parser.bytes = bytes;
var charStringsIndex = parser.parseIndex(0).obj;
var charStrings = parser.parseCharStrings({
charStrings: charStringsIndex,
privateDict: privateDictStub,
}).charStrings;
expect(charStrings.count).toEqual(1);
// shoudn't be sanitized
expect(charStrings.get(0).length).toEqual(38);
});
it('parses a CharString endchar with 4 args w/seac enabled', function() {
var parser = new CFFParser(fontData, {},
/* seacAnalysisEnabled = */ true);
parser.parse(); // cff
var bytes = new Uint8Array([0, 1, // count
1, // offsetSize
0, // offset[0]
237, 247, 22, 247, 72, 204, 247, 86, 14]);
parser.bytes = bytes;
var charStringsIndex = parser.parseIndex(0).obj;
var result = parser.parseCharStrings({
charStrings: charStringsIndex,
privateDict: privateDictStub,
});
expect(result.charStrings.count).toEqual(1);
expect(result.charStrings.get(0).length).toEqual(1);
expect(result.seacs.length).toEqual(1);
expect(result.seacs[0].length).toEqual(4);
expect(result.seacs[0][0]).toEqual(130);
expect(result.seacs[0][1]).toEqual(180);
expect(result.seacs[0][2]).toEqual(65);
expect(result.seacs[0][3]).toEqual(194);
});
it('parses a CharString endchar with 4 args w/seac disabled', function() {
var parser = new CFFParser(fontData, {},
/* seacAnalysisEnabled = */ false);
parser.parse(); // cff
var bytes = new Uint8Array([0, 1, // count
1, // offsetSize
0, // offset[0]
237, 247, 22, 247, 72, 204, 247, 86, 14]);
parser.bytes = bytes;
var charStringsIndex = parser.parseIndex(0).obj;
var result = parser.parseCharStrings({
charStrings: charStringsIndex,
privateDict: privateDictStub,
});
expect(result.charStrings.count).toEqual(1);
expect(result.charStrings.get(0).length).toEqual(9);
expect(result.seacs.length).toEqual(0);
});
it('parses a CharString endchar no args', function() {
var bytes = new Uint8Array([0, 1, // count
1, // offsetSize
0, // offset[0]
14]);
parser.bytes = bytes;
var charStringsIndex = parser.parseIndex(0).obj;
var result = parser.parseCharStrings({
charStrings: charStringsIndex,
privateDict: privateDictStub,
});
expect(result.charStrings.count).toEqual(1);
expect(result.charStrings.get(0)[0]).toEqual(14);
expect(result.seacs.length).toEqual(0);
});
it('parses predefined charsets', function() {
var charset = parser.parseCharsets(0, 0, null, true);
expect(charset.predefined).toEqual(true);
});
it('parses charset format 0', function() {
// The first three bytes make the offset large enough to skip predefined.
var bytes = new Uint8Array([0x00, 0x00, 0x00,
0x00, // format
0x00, 0x02 // sid/cid
]);
parser.bytes = bytes;
var charset = parser.parseCharsets(3, 2, new CFFStrings(), false);
expect(charset.charset[1]).toEqual('exclam');
// CID font
charset = parser.parseCharsets(3, 2, new CFFStrings(), true);
expect(charset.charset[1]).toEqual(2);
});
it('parses charset format 1', function() {
// The first three bytes make the offset large enough to skip predefined.
var bytes = new Uint8Array([0x00, 0x00, 0x00,
0x01, // format
0x00, 0x08, // sid/cid start
0x01 // sid/cid left
]);
parser.bytes = bytes;
var charset = parser.parseCharsets(3, 2, new CFFStrings(), false);
expect(charset.charset).toEqual(['.notdef', 'quoteright', 'parenleft']);
// CID font
charset = parser.parseCharsets(3, 2, new CFFStrings(), true);
expect(charset.charset).toEqual(['.notdef', 8, 9]);
});
it('parses charset format 2', function() {
// format 2 is the same as format 1 but the left is card16
// The first three bytes make the offset large enough to skip predefined.
var bytes = new Uint8Array([0x00, 0x00, 0x00,
0x02, // format
0x00, 0x08, // sid/cid start
0x00, 0x01 // sid/cid left
]);
parser.bytes = bytes;
var charset = parser.parseCharsets(3, 2, new CFFStrings(), false);
expect(charset.charset).toEqual(['.notdef', 'quoteright', 'parenleft']);
// CID font
charset = parser.parseCharsets(3, 2, new CFFStrings(), true);
expect(charset.charset).toEqual(['.notdef', 8, 9]);
});
it('parses encoding format 0', function() {
// The first two bytes make the offset large enough to skip predefined.
var bytes = new Uint8Array([0x00, 0x00,
0x00, // format
0x01, // count
0x08 // start
]);
parser.bytes = bytes;
var encoding = parser.parseEncoding(2, {}, new CFFStrings(), null);
expect(encoding.encoding).toEqual(createWithNullProto({ 0x8: 1, }));
});
it('parses encoding format 1', function() {
// The first two bytes make the offset large enough to skip predefined.
var bytes = new Uint8Array([0x00, 0x00,
0x01, // format
0x01, // num ranges
0x07, // range1 start
0x01 // range2 left
]);
parser.bytes = bytes;
var encoding = parser.parseEncoding(2, {}, new CFFStrings(), null);
expect(encoding.encoding).toEqual(
createWithNullProto({ 0x7: 0x01, 0x08: 0x02, }));
});
it('parses fdselect format 0', function() {
var bytes = new Uint8Array([0x00, // format
0x00, // gid: 0 fd: 0
0x01 // gid: 1 fd: 1
]);
parser.bytes = bytes.slice();
var fdSelect = parser.parseFDSelect(0, 2);
expect(fdSelect.fdSelect).toEqual([0, 1]);
expect(fdSelect.raw).toEqual(bytes);
});
it('parses fdselect format 3', function() {
var bytes = new Uint8Array([0x03, // format
0x00, 0x02, // range count
0x00, 0x00, // first gid
0x09, // font dict 1 id
0x00, 0x02, // next gid
0x0a, // font dict 2 id
0x00, 0x04 // sentinel (last gid)
]);
parser.bytes = bytes.slice();
var fdSelect = parser.parseFDSelect(0, 4);
expect(fdSelect.fdSelect).toEqual([9, 9, 0xa, 0xa]);
expect(fdSelect.raw).toEqual(bytes);
});
it('parses invalid fdselect format 3 (bug 1146106)', function() {
var bytes = new Uint8Array([0x03, // format
0x00, 0x02, // range count
0x00, 0x01, // first gid (invalid)
0x09, // font dict 1 id
0x00, 0x02, // next gid
0x0a, // font dict 2 id
0x00, 0x04 // sentinel (last gid)
]);
parser.bytes = bytes.slice();
var fdSelect = parser.parseFDSelect(0, 4);
expect(fdSelect.fdSelect).toEqual([9, 9, 0xa, 0xa]);
bytes[3] = bytes[4] = 0x00; // The adjusted first range, first gid.
expect(fdSelect.raw).toEqual(bytes);
});
// TODO fdArray
});
describe('CFFCompiler', function() {
function testParser(bytes) {
bytes = new Uint8Array(bytes);
return new CFFParser({
getBytes: () => {
return bytes;
},
}, {}, SEAC_ANALYSIS_ENABLED);
}
it('encodes integers', function() {
var c = new CFFCompiler();
// all the examples from the spec
expect(c.encodeInteger(0)).toEqual([0x8b]);
expect(c.encodeInteger(100)).toEqual([0xef]);
expect(c.encodeInteger(-100)).toEqual([0x27]);
expect(c.encodeInteger(1000)).toEqual([0xfa, 0x7c]);
expect(c.encodeInteger(-1000)).toEqual([0xfe, 0x7c]);
expect(c.encodeInteger(10000)).toEqual([0x1c, 0x27, 0x10]);
expect(c.encodeInteger(-10000)).toEqual([0x1c, 0xd8, 0xf0]);
expect(c.encodeInteger(100000)).toEqual([0x1d, 0x00, 0x01, 0x86, 0xa0]);
expect(c.encodeInteger(-100000)).toEqual([0x1d, 0xff, 0xfe, 0x79, 0x60]);
});
it('encodes floats', function() {
var c = new CFFCompiler();
expect(c.encodeFloat(-2.25)).toEqual([0x1e, 0xe2, 0xa2, 0x5f]);
expect(c.encodeFloat(5e-11)).toEqual([0x1e, 0x5c, 0x11, 0xff]);
});
it('sanitizes name index', function() {
var c = new CFFCompiler();
var nameIndexCompiled = c.compileNameIndex(['[a']);
var parser = testParser(nameIndexCompiled);
var nameIndex = parser.parseIndex(0);
var names = parser.parseNameIndex(nameIndex.obj);
expect(names).toEqual(['_a']);
var longName = '';
for (var i = 0; i < 129; i++) {
longName += '_';
}
nameIndexCompiled = c.compileNameIndex([longName]);
parser = testParser(nameIndexCompiled);
nameIndex = parser.parseIndex(0);
names = parser.parseNameIndex(nameIndex.obj);
expect(names[0].length).toEqual(127);
});
// TODO a lot more compiler tests
});