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505 lines
17 KiB
JavaScript
505 lines
17 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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CFFCharset,
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CFFCompiler,
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CFFFDSelect,
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CFFParser,
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CFFStrings,
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} from "../../src/core/cff_parser.js";
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import { SEAC_ANALYSIS_ENABLED } from "../../src/core/fonts_utils.js";
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import { Stream } from "../../src/core/stream.js";
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describe("CFFParser", function () {
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function createWithNullProto(obj) {
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const result = Object.create(null);
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for (const 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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const 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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let fontData, parser, cff;
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beforeAll(function () {
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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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const exampleFont =
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"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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const fontArr = [];
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for (let i = 0, ii = exampleFont.length; i < ii; i += 2) {
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const hex = exampleFont.substring(i, 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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});
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afterAll(function () {
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fontData = null;
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});
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beforeEach(function () {
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parser = new CFFParser(fontData, {}, SEAC_ANALYSIS_ENABLED);
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cff = parser.parse();
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});
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afterEach(function () {
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parser = cff = null;
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});
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it("parses header", function () {
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const 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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const 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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const 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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const 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)", function () {
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const topDict = cff.topDict;
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const 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(
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"ignores reserved commands in parseDict, and refuses to add privateDict " +
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"keys with invalid values (bug 1308536)",
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function () {
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const 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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const topDict = cff.topDict;
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topDict.setByName("Private", [bytes.length, 0]);
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const 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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const privateDict = topDict.privateDict;
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expect(privateDict.getByName("BlueValues")).toBeNull();
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}
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);
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it("parses a CharString having cntrmask", function () {
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// prettier-ignore
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const 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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const charStringsIndex = parser.parseIndex(0).obj;
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const 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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// shouldn'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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const cffParser = new CFFParser(
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fontData,
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{},
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/* seacAnalysisEnabled = */ true
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);
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cffParser.parse(); // cff
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// prettier-ignore
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const 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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cffParser.bytes = bytes;
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const charStringsIndex = cffParser.parseIndex(0).obj;
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const result = cffParser.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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const cffParser = new CFFParser(
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fontData,
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{},
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/* seacAnalysisEnabled = */ false
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);
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cffParser.parse(); // cff
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// prettier-ignore
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const 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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cffParser.bytes = bytes;
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const charStringsIndex = cffParser.parseIndex(0).obj;
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const result = cffParser.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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// prettier-ignore
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const 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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const charStringsIndex = parser.parseIndex(0).obj;
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const 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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const 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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// prettier-ignore
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const 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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let 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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// prettier-ignore
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const 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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let 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([0, 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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// prettier-ignore
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const 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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let 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([0, 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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// prettier-ignore
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const 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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const 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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// prettier-ignore
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const 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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const 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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});
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it("parses fdselect format 0", function () {
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// prettier-ignore
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const 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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const fdSelect = parser.parseFDSelect(0, 2);
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expect(fdSelect.fdSelect).toEqual([0, 1]);
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expect(fdSelect.format).toEqual(0);
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});
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it("parses fdselect format 3", function () {
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// prettier-ignore
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const 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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const fdSelect = parser.parseFDSelect(0, 4);
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expect(fdSelect.fdSelect).toEqual([9, 9, 0xa, 0xa]);
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expect(fdSelect.format).toEqual(3);
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});
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it("parses invalid fdselect format 3 (bug 1146106)", function () {
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// prettier-ignore
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const 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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const fdSelect = parser.parseFDSelect(0, 4);
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expect(fdSelect.fdSelect).toEqual([9, 9, 0xa, 0xa]);
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expect(fdSelect.format).toEqual(3);
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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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{
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getBytes: () => bytes,
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},
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{},
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SEAC_ANALYSIS_ENABLED
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);
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}
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it("encodes integers", function () {
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const 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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const 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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const c = new CFFCompiler();
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let nameIndexCompiled = c.compileNameIndex(["[a"]);
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let parser = testParser(nameIndexCompiled);
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let nameIndex = parser.parseIndex(0);
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let names = parser.parseNameIndex(nameIndex.obj);
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expect(names).toEqual(["_a"]);
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let longName = "";
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for (let 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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it("compiles fdselect format 0", function () {
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const fdSelect = new CFFFDSelect(0, [3, 2, 1]);
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const c = new CFFCompiler();
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const out = c.compileFDSelect(fdSelect);
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expect(out).toEqual([
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0, // format
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3, // gid: 0 fd 3
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2, // gid: 1 fd 3
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1, // gid: 2 fd 3
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]);
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});
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it("compiles fdselect format 3", function () {
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const fdSelect = new CFFFDSelect(3, [0, 0, 1, 1]);
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const c = new CFFCompiler();
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const out = c.compileFDSelect(fdSelect);
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expect(out).toEqual([
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3, // format
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0, // nRanges (high)
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2, // nRanges (low)
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0, // range struct 0 - first (high)
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0, // range struct 0 - first (low)
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0, // range struct 0 - fd
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0, // range struct 0 - first (high)
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2, // range struct 0 - first (low)
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1, // range struct 0 - fd
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0, // sentinel (high)
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4, // sentinel (low)
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]);
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});
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it("compiles fdselect format 3, single range", function () {
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const fdSelect = new CFFFDSelect(3, [0, 0]);
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const c = new CFFCompiler();
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const out = c.compileFDSelect(fdSelect);
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expect(out).toEqual([
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3, // format
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0, // nRanges (high)
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1, // nRanges (low)
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0, // range struct 0 - first (high)
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0, // range struct 0 - first (low)
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0, // range struct 0 - fd
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0, // sentinel (high)
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2, // sentinel (low)
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]);
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});
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it("compiles charset of CID font", function () {
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const charset = new CFFCharset();
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const c = new CFFCompiler();
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const numGlyphs = 7;
|
|
const out = c.compileCharset(charset, numGlyphs, new CFFStrings(), true);
|
|
// All CID charsets get turned into a simple format 2.
|
|
expect(out).toEqual([
|
|
2, // format
|
|
0, // cid (high)
|
|
1, // cid (low)
|
|
0, // nLeft (high)
|
|
numGlyphs - 2, // nLeft (low)
|
|
]);
|
|
});
|
|
|
|
it("compiles charset of non CID font", function () {
|
|
const charset = new CFFCharset(false, 0, ["space", "exclam"]);
|
|
const c = new CFFCompiler();
|
|
const numGlyphs = 3;
|
|
const out = c.compileCharset(charset, numGlyphs, new CFFStrings(), false);
|
|
// All non-CID fonts use a format 0 charset.
|
|
expect(out).toEqual([
|
|
0, // format
|
|
0, // sid of 'space' (high)
|
|
1, // sid of 'space' (low)
|
|
0, // sid of 'exclam' (high)
|
|
2, // sid of 'exclam' (low)
|
|
]);
|
|
});
|
|
|
|
// TODO a lot more compiler tests
|
|
});
|