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Restructure/rewrite of the Type1 font parser.

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This commit is contained in:
Brendan Dahl 2013-03-27 17:15:44 -07:00
parent 921f3211a4
commit 028151d13a
2 changed files with 325 additions and 245 deletions
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93
test/unit/font_spec.js
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@ -1,7 +1,7 @@
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* globals expect, it, describe, CFFCompiler, CFFParser, CFFIndex, CFFStrings,
SEAC_ANALYSIS_ENABLED:true */
SEAC_ANALYSIS_ENABLED:true, Type1Parser, StringStream */
'use strict';
@ -297,4 +297,95 @@ describe('font', function() {
});
// TODO a lot more compiler tests
});
describe('Type1Parser', function() {
it('splits tokens', function() {
var stream = new StringStream('/BlueValues[-17 0]noaccess def');
var parser = new Type1Parser(stream);
expect(parser.getToken()).toEqual('/');
expect(parser.getToken()).toEqual('BlueValues');
expect(parser.getToken()).toEqual('[');
expect(parser.getToken()).toEqual('-17');
expect(parser.getToken()).toEqual('0');
expect(parser.getToken()).toEqual(']');
expect(parser.getToken()).toEqual('noaccess');
expect(parser.getToken()).toEqual('def');
expect(parser.getToken()).toEqual(null);
});
it('handles glued tokens', function() {
var stream = new StringStream('dup/CharStrings');
var parser = new Type1Parser(stream);
expect(parser.getToken()).toEqual('dup');
expect(parser.getToken()).toEqual('/');
expect(parser.getToken()).toEqual('CharStrings');
});
it('ignores whitespace', function() {
var stream = new StringStream('\nab c\t');
var parser = new Type1Parser(stream);
expect(parser.getToken()).toEqual('ab');
expect(parser.getToken()).toEqual('c');
});
it('parses numbers', function() {
var stream = new StringStream('123');
var parser = new Type1Parser(stream);
expect(parser.readNumber()).toEqual(123);
});
it('parses booleans', function() {
var stream = new StringStream('true false');
var parser = new Type1Parser(stream);
expect(parser.readBoolean()).toEqual(1);
expect(parser.readBoolean()).toEqual(0);
});
it('parses number arrays', function() {
var stream = new StringStream('[1 2]');
var parser = new Type1Parser(stream);
expect(parser.readNumberArray()).toEqual([1, 2]);
// Variation on spacing.
var stream = new StringStream('[ 1 2 ]');
parser = new Type1Parser(stream);
expect(parser.readNumberArray()).toEqual([1, 2]);
});
it('skips comments', function() {
var stream = new StringStream(
'%!PS-AdobeFont-1.0: CMSY10 003.002\n' +
'%%Title: CMSY10\n' +
'%Version: 003.002\n' +
'FontDirectory');
var parser = new Type1Parser(stream);
expect(parser.getToken()).toEqual('FontDirectory');
});
it('parses font program', function() {
var stream = new StringStream(
'/ExpansionFactor 99\n' +
'/Subrs 1 array\n' +
'dup 0 1 RD x noaccess put\n'+
'/CharStrings 46 dict dup begin\n' +
'/.notdef 1 RD x ND' + '\n' +
'end');
var parser = new Type1Parser(stream);
var program = parser.extractFontProgram();
expect(program.charstrings.length).toEqual(1);
expect(program.properties.privateData.ExpansionFactor).toEqual(99);
});
it('parses font header font matrix', function() {
var stream = new StringStream(
'/FontMatrix [0.001 0 0 0.001 0 0 ]readonly def\n');
var parser = new Type1Parser(stream);
var props = {};
var program = parser.extractFontHeader(props);
expect(props.fontMatrix).toEqual([0.001, 0, 0, 0.001, 0, 0]);
});
it('parses font header encoding', function() {
var stream = new StringStream(
'/Encoding 256 array\n' +
'0 1 255 {1 index exch /.notdef put} for\n' +
'dup 33 /arrowright put\n' +
'readonly def\n');
var parser = new Type1Parser(stream);
var props = {};
var program = parser.extractFontHeader(props);
expect(props.baseEncoding[33]).toEqual('arrowright');
});
});
});