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CFF Parser and Compiler.

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This commit is contained in:
Brendan Dahl 2012-03-10 19:12:33 -08:00
parent 676e575a52
commit ce53b1b018
5 changed files with 1292 additions and 434 deletions
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1485
src/fonts.js
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1
test/pdfs/.gitignore vendored
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@ -24,4 +24,5 @@
!type4psfunc.pdf
!S2.pdf
!zerowidthline.pdf
!issue1002.pdf
!issue925.pdf

BIN
test/pdfs/issue1002.pdf Normal file
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7
test/test_manifest.json
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@ -488,6 +488,13 @@
"link": true,
"type": "eq"
},
{ "id": "issue1002",
"file": "pdfs/issue1002.pdf",
"md5": "af62d6cd95079322d4af18edd960d15c",
"rounds": 1,
"link": false,
"type": "eq"
},
{ "id": "issue1243",
"file": "pdfs/issue1243.pdf",
"md5": "130c849b83513d5ac5e03c6421fc7489",

223
test/unit/font_spec.js Normal file
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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
'use strict';
describe('font', function() {
function hexDump(bytes) {
var line = '';
for (var i = 0, ii = bytes.length; i < ii; ++i) {
var b = bytes[i].toString(16);
if (b.length < 2)
b = '0' + b;
line += b.toString(16);
}
return line;
}
// 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 fontData = [];
for (var i = 0; i < exampleFont.length; i += 2) {
var hex = exampleFont.substr(i, 2);
fontData.push(parseInt(hex, 16));
}
var bytes = new Uint8Array(fontData);
fontData = {getBytes: function() { return bytes}};
function bytesToString(bytesArray) {
var str = '';
for (var i = 0, ii = bytesArray.length; i < ii; i++)
str += String.fromCharCode(bytesArray[i]);
return str;
}
describe('CFFParser', function() {
var parser = new CFFParser(fontData);
var cff = parser.parse();
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('sanitizes name index', function() {
var index = new CFFIndex();
index.add(['['.charCodeAt(0), 'a'.charCodeAt(0)]);
var names = parser.parseNameIndex(index);
expect(names).toEqual(['_a']);
index = new CFFIndex();
var longName = [];
for (var i = 0; i < 129; i++)
longName.push(0);
index.add(longName);
names = parser.parseNameIndex(index);
expect(names[0].length).toEqual(127);
});
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('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
var 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
var 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
var 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({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({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;
var fdSelect = parser.parseFDSelect(0, 2);
expect(fdSelect.fdSelect).toEqual([0, 1]);
});
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, // nex gid
0x0a, // font dict 2 gid
0x00, 0x04, // sentinel (last gid)
]);
parser.bytes = bytes;
var fdSelect = parser.parseFDSelect(0, 2);
expect(fdSelect.fdSelect).toEqual([9, 9, 0xa, 0xa]);
});
// TODO fdArray
});
describe('CFFCompiler', function() {
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]);
});
// TODO a lot more compiler tests
});
});