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ttf_test.dart
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ttf_test.dart
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import 'dart:convert';
import 'dart:io';
import 'dart:typed_data';
import 'package:fontify/src/common/generic_glyph.dart';
import 'package:fontify/src/otf/io.dart';
import 'package:fontify/src/otf/reader.dart';
import 'package:fontify/src/otf/table/all.dart';
import 'package:fontify/src/otf/table/hhea.dart';
import 'package:fontify/src/otf/otf.dart';
import 'package:fontify/src/utils/misc.dart';
import 'package:fontify/src/utils/otf.dart';
import 'package:test/test.dart';
import 'constant.dart';
const _kTestFontAssetPath = '$kTestAssetsDir/test_font.ttf';
const _kTestCFF2fontAssetPath = '$kTestAssetsDir/test_cff2_font.otf';
void main() {
late OpenTypeFont font;
group('Reader', () {
setUpAll(() {
font = readFromFile(_kTestFontAssetPath);
});
test('Offset table', () {
final table = font.offsetTable;
expect(table.entrySelector, 3);
expect(table.numTables, 11);
expect(table.rangeShift, 48);
expect(table.searchRange, 128);
expect(table.sfntVersion, 0x10000);
expect(table.isOpenType, false);
});
test('Maximum Profile table', () {
final table = font.tableMap[kMaxpTag] as MaximumProfileTable;
expect(table, isNotNull);
expect(table.version, 0x00010000);
expect(table.numGlyphs, 166);
expect(table.maxPoints, 333);
expect(table.maxContours, 22);
expect(table.maxCompositePoints, 0);
expect(table.maxCompositeContours, 0);
expect(table.maxZones, 2);
expect(table.maxTwilightPoints, 0);
expect(table.maxStorage, 10);
expect(table.maxFunctionDefs, 10);
expect(table.maxInstructionDefs, 0);
expect(table.maxStackElements, 255);
expect(table.maxSizeOfInstructions, 0);
expect(table.maxComponentElements, 0);
expect(table.maxComponentDepth, 0);
});
test('Header table', () {
final table = font.tableMap[kHeadTag] as HeaderTable;
expect(table, isNotNull);
expect(table.majorVersion, 1);
expect(table.minorVersion, 0);
expect(table.fontRevision.major, 1);
expect(table.fontRevision.minor, 0);
expect(table.checkSumAdjustment, 3043242535);
expect(table.magicNumber, 1594834165);
expect(table.flags, 11);
expect(table.unitsPerEm, 1000);
expect(table.created, DateTime.parse('2020-06-09T08:21:53.000Z'));
expect(table.modified, DateTime.parse('2020-06-09T08:21:53.000Z'));
expect(table.xMin, -11);
expect(table.yMin, -153);
expect(table.xMax, 1636);
expect(table.yMax, 853);
expect(table.macStyle, 0);
expect(table.lowestRecPPEM, 8);
expect(table.fontDirectionHint, 2);
expect(table.indexToLocFormat, 0);
expect(table.glyphDataFormat, 0);
});
test('Glyph Data table', () {
final table = font.tableMap[kGlyfTag] as GlyphDataTable;
expect(table, isNotNull);
expect(table.glyphList.length, 166);
final glyphCalendRainbow = table.glyphList[1];
expect(glyphCalendRainbow.header.numberOfContours, 3);
expect(glyphCalendRainbow.header.xMin, 0);
expect(glyphCalendRainbow.header.yMin, 0);
expect(glyphCalendRainbow.header.xMax, 1000);
expect(glyphCalendRainbow.header.yMax, 623);
expect(
glyphCalendRainbow.flags
.sublist(0, 7)
.map((f) => f.onCurvePoint)
.toList(),
[true, false, true, false, true, false, false]);
expect(glyphCalendRainbow.pointList.first.x, 936);
expect(glyphCalendRainbow.pointList.last.x, 681);
expect(glyphCalendRainbow.pointList.first.y, 110);
expect(glyphCalendRainbow.pointList.last.y, 94);
final glyphReport = table.glyphList[73];
expect(glyphReport.header.numberOfContours, 4);
expect(glyphReport.header.xMin, 0);
expect(glyphReport.header.yMin, -150);
expect(glyphReport.header.xMax, 1001);
expect(glyphReport.header.yMax, 788);
expect(
glyphReport.flags.sublist(0, 7).map((f) => f.onCurvePoint).toList(),
[true, false, false, true, true, false, false]);
expect(glyphReport.pointList.first.x, 63);
expect(glyphReport.pointList.last.x, 563);
expect(glyphReport.pointList.first.y, 788);
expect(glyphReport.pointList.last.y, 350);
final glyphPdf = table.glyphList[165];
expect(glyphPdf.header.numberOfContours, 5);
expect(glyphPdf.header.xMin, 0);
expect(glyphPdf.header.yMin, -88);
expect(glyphPdf.header.xMax, 751);
expect(glyphPdf.header.yMax, 788);
expect(glyphPdf.flags.sublist(0, 7).map((f) => f.onCurvePoint).toList(),
[true, false, false, true, true, false, false]);
expect(glyphPdf.pointList.first.x, 63);
expect(glyphPdf.pointList.last.x, 448);
expect(glyphPdf.pointList.first.y, 788);
expect(glyphPdf.pointList.last.y, 208);
});
test('OS/2 V1 table', () {
final table = font.tableMap[kOS2Tag] as OS2Table;
expect(table, isNotNull);
expect(table.version, 1);
expect(table.xAvgCharWidth, 862);
expect(table.usWeightClass, 400);
expect(table.usWidthClass, 5);
expect(table.fsType, 0);
expect(table.ySubscriptXSize, 634);
expect(table.ySubscriptYSize, 700);
expect(table.ySubscriptXOffset, 0);
expect(table.ySubscriptYOffset, 140);
expect(table.ySuperscriptXSize, 634);
expect(table.ySuperscriptYSize, 700);
expect(table.ySuperscriptXOffset, 0);
expect(table.ySuperscriptYOffset, 480);
expect(table.yStrikeoutSize, 49);
expect(table.yStrikeoutPosition, 258);
expect(table.sFamilyClass, 0);
expect(table.panose, [2, 0, 5, 3, 0, 0, 0, 0, 0, 0]);
expect(table.ulUnicodeRange1, 0);
expect(table.ulUnicodeRange2, 0);
expect(table.ulUnicodeRange3, 0);
expect(table.ulUnicodeRange4, 0);
expect(table.achVendID, 'PfEd');
expect(table.fsSelection, 64);
expect(table.usFirstCharIndex, 59414);
expect(table.usLastCharIndex, 62368);
expect(table.sTypoAscender, 850);
expect(table.sTypoDescender, -150);
expect(table.sTypoLineGap, 90);
expect(table.usWinAscent, 853);
expect(table.usWinDescent, 153);
expect(table.ulCodePageRange1, 1);
expect(table.ulCodePageRange2, 0);
});
test('PostScript table', () {
final table = font.tableMap[kPostTag] as PostScriptTable;
expect(table, isNotNull);
expect(table.header.version, const Revision(2, 0));
expect(table.header.italicAngle, 0);
expect(table.header.underlinePosition, 10);
expect(table.header.underlineThickness, 0);
expect(table.header.isFixedPitch, 0);
expect(table.header.minMemType42, 0);
expect(table.header.maxMemType42, 0);
expect(table.header.minMemType1, 0);
expect(table.header.maxMemType1, 0);
final format20 = table.data as PostScriptVersion20;
expect(format20.numberOfGlyphs, 166);
expect(format20.glyphNameIndex, _kPOSTformat20indicies);
expect(format20.glyphNames.map((ps) => ps.string).toList(),
_kPOSTformat20names);
});
test('Naming table', () {
final table = font.tableMap[kNameTag] as NamingTableFormat0;
expect(table, isNotNull);
expect(table.header.format, 0);
expect(table.header.count, 18);
expect(table.stringList.contains('Regular'), isTrue);
expect(table.stringList.contains('TestFont'), isTrue);
expect(table.stringList.contains('Version 1.0'), isTrue);
});
test('Character To Glyph Index Mapping table', () {
final table = font.tableMap[kCmapTag] as CharacterToGlyphTable;
expect(table, isNotNull);
expect(table.header.version, 0);
expect(table.header.numTables, 5);
final format0table = table.data[2] as CmapByteEncodingTable;
expect(format0table.format, 0);
expect(format0table.language, 0);
expect(format0table.length, 262);
expect(format0table.glyphIdArray, List.generate(256, (_) => 0));
final format4table =
table.data[0] as CmapSegmentMappingToDeltaValuesTable;
expect(format4table.format, 4);
expect(format4table.length, 410);
expect(format4table.language, 0);
expect(format4table.entrySelector, 3);
expect(format4table.searchRange, 16);
expect(format4table.rangeShift, 0);
expect(format4table.segCount, 8);
expect(format4table.glyphIdArray, List.generate(165, (i) => i + 1));
expect(format4table.idDelta, [0, 0, 0, 0, 0, 0, 0, 1]);
expect(format4table.idRangeOffset, [16, 16, 16, 16, 16, 16, 320, 0]);
expect(format4table.startCode,
[59414, 59430, 59436, 59444, 59446, 62208, 62362, 65535]);
expect(format4table.endCode,
[59414, 59430, 59436, 59444, 59446, 62360, 62368, 65535]);
final format12table = table.data[1] as CmapSegmentedCoverageTable;
expect(format12table.format, 12);
expect(format12table.language, 0);
expect(format12table.numGroups, 165);
expect(format12table.length, 1996);
expect(format12table.groups.map((g) => g.startCharCode).toList(),
_kCMAPcharCodes);
expect(format12table.groups.map((g) => g.endCharCode).toList(),
_kCMAPcharCodes);
expect(format12table.groups.map((g) => g.startGlyphID).toList(),
List.generate(165, (i) => i + 1));
});
test('Horizontal Header table', () {
final table = font.tableMap[kHheaTag] as HorizontalHeaderTable;
expect(table, isNotNull);
expect(table.majorVersion, 1);
expect(table.minorVersion, 0);
expect(table.ascender, 850);
expect(table.descender, -150);
expect(table.lineGap, 0);
expect(table.advanceWidthMax, 1636);
expect(table.minLeftSideBearing, -11);
expect(table.minRightSideBearing, -7);
expect(table.xMaxExtent, 1636);
expect(table.caretSlopeRise, 1);
expect(table.caretSlopeRun, 0);
expect(table.caretOffset, 0);
expect(table.metricDataFormat, 0);
expect(table.numberOfHMetrics, 166);
});
test('Horizontal Metrics table', () {
final table = font.tableMap[kHmtxTag] as HorizontalMetricsTable;
expect(table, isNotNull);
expect(table.leftSideBearings, isEmpty);
expect(
table.hMetrics.map((m) => m.advanceWidth).toList(), _kHMTXadvWidth);
expect(table.hMetrics.map((m) => m.lsb).toList(), _kHMTXlsb);
});
test('Glyph Substitution table', () {
final table = font.tableMap[kGSUBTag] as GlyphSubstitutionTable;
expect(table, isNotNull);
final scriptTable = table.scriptListTable;
expect(scriptTable.scriptCount, 2);
expect(scriptTable.scriptRecords[0].scriptTag, 'DFLT');
expect(scriptTable.scriptTables[0].langSysCount, 0);
expect(scriptTable.scriptTables[0].defaultLangSys?.featureIndexCount, 1);
expect(scriptTable.scriptTables[0].defaultLangSys?.featureIndices, [0]);
expect(scriptTable.scriptTables[0].defaultLangSys?.lookupOrder, 0);
expect(
scriptTable.scriptTables[0].defaultLangSys?.requiredFeatureIndex, 0);
expect(scriptTable.scriptRecords[1].scriptTag, 'latn');
expect(scriptTable.scriptTables[1].langSysCount, 0);
expect(scriptTable.scriptTables[1].defaultLangSys?.featureIndexCount, 1);
expect(scriptTable.scriptTables[1].defaultLangSys?.featureIndices, [0]);
expect(scriptTable.scriptTables[1].defaultLangSys?.lookupOrder, 0);
expect(
scriptTable.scriptTables[1].defaultLangSys?.requiredFeatureIndex, 0);
final featureTable = table.featureListTable;
expect(featureTable.featureCount, 1);
expect(featureTable.featureRecords[0].featureTag, 'liga');
expect(featureTable.featureTables[0].featureParams, 0);
expect(featureTable.featureTables[0].lookupIndexCount, 1);
expect(featureTable.featureTables[0].lookupListIndices, [0]);
final lookupListTable = table.lookupListTable;
expect(lookupListTable.lookupCount, 1);
final lookupTable = lookupListTable.lookupTables.first;
expect(lookupTable.lookupFlag, 0);
expect(lookupTable.lookupType, 4);
final lookupSubtable =
lookupTable.subtables.first as LigatureSubstitutionSubtable;
expect(lookupSubtable.ligatureSetCount, 0);
expect(lookupSubtable.ligatureSetOffsets, isEmpty);
expect(lookupSubtable.substFormat, 1);
final coverageTable =
lookupSubtable.coverageTable as CoverageTableFormat1;
expect(coverageTable.coverageFormat, 1);
expect(coverageTable.glyphCount, 0);
expect(coverageTable.glyphArray, isEmpty);
});
});
group('Creation & Writer', () {
late ByteData originalByteData, recreatedByteData;
late OpenTypeFont recreatedFont;
setUpAll(() {
MockableDateTime.mockedDate = DateTime.utc(2020, 2, 2, 2, 2);
originalByteData =
ByteData.sublistView(File(_kTestFontAssetPath).readAsBytesSync());
font = OTFReader.fromByteData(originalByteData).read();
final glyphNameList = (font.post.data as PostScriptVersion20)
.glyphNames
.map((s) => s.string)
.toList();
final glyphList = font.glyf.glyphList
.map((e) => GenericGlyph.fromSimpleTrueTypeGlyph(e))
.toList();
for (var i = 0; i < glyphList.length; i++) {
glyphList[i].metadata.name = glyphNameList[i];
}
recreatedFont = OpenTypeFont.createFromGlyphs(
glyphList: glyphList,
fontName: 'TestFont',
useOpenType: false,
usePostV2: true,
);
recreatedByteData = ByteData(recreatedFont.size);
recreatedFont.encodeToBinary(recreatedByteData);
});
tearDownAll(() {
MockableDateTime.mockedDate = null;
});
test('Header table', () {
const expected =
'AAEAAAABAADXpqNjXw889QALBAAAAAAA2lveGAAAAADaW94Y//X/ZwZkBAAAAAAIAAIAAAAA';
final actual = base64Encode(recreatedByteData.buffer.asUint8List(
recreatedFont.head.entry!.offset, recreatedFont.head.entry!.length));
expect(actual, expected);
expect(recreatedFont.head.entry!.checkSum, 439353492);
}, skip: "Font's checksum is always changing, unskip later");
test('Glyph Substitution table', () {
const expected =
'AAEAAAAKADAAPgACREZMVAAObGF0bgAaAAQAAAAA//8AAQAAAAQAAAAA//8AAQAAAAFsaWdhAAgAAAABAAAAAQAEAAQAAAABAAgAAQAGAAAAAQAA';
final actual = base64Encode(recreatedByteData.buffer.asUint8List(
recreatedFont.gsub.entry!.offset, recreatedFont.gsub.entry!.length));
expect(actual, expected);
expect(recreatedFont.gsub.entry!.checkSum, 546121080);
});
test('OS/2 V5', () {
final table = recreatedFont.os2;
expect(table.version, 5);
expect(table.xAvgCharWidth, 675);
});
});
group('CFF', () {
late ByteData byteData;
setUpAll(() {
byteData =
ByteData.sublistView(File(_kTestCFF2fontAssetPath).readAsBytesSync());
font = OTFReader.fromByteData(byteData).read();
});
test('CFF2 Read & Write', () {
final table = font.cff2;
final originalCFF2byteList =
byteData.buffer.asUint8List(table.entry!.offset, table.size).toList();
final encodedCFF2byteData = ByteData(table.size);
expect(table.size, table.entry!.length);
table
..recalculateOffsets()
..encodeToBinary(encodedCFF2byteData);
final encodedCFF2byteList =
encodedCFF2byteData.buffer.asUint8List().toList();
expect(encodedCFF2byteList, originalCFF2byteList);
});
test('CFF2 CharString Read & Write', () {
// final interpreter = CharStringInterpreter();
// final commands = [
// CharStringCommand.rmoveto(0, 0),
// CharStringCommand.rlineto([100, 100]),
// CharStringCommand.rmoveto(-50, -50),
// CharStringCommand.rlineto([100, 100]),
// ];
// final encoded = interpreter.writeCommands(commands);
// final decoded = interpreter.readCommands(encoded);
// TODO: !!! do some tests
});
});
group('Generic Glyph', () {
setUpAll(() {
font = readFromFile(_kTestFontAssetPath);
});
test('Conversion from TrueType and back', () {
final genericList = font.glyf.glyphList
.map((e) => GenericGlyph.fromSimpleTrueTypeGlyph(e))
.toList();
final simpleList =
genericList.map((e) => e.toSimpleTrueTypeGlyph()).toList();
for (var i = 0; i < genericList.length; i++) {
expect(simpleList[i].pointList, font.glyf.glyphList[i].pointList);
}
});
test('Decompact and compact back', () {
final genericList = font.glyf.glyphList
.map((e) => GenericGlyph.fromSimpleTrueTypeGlyph(e))
.toList();
for (final g in genericList) {
for (final o in g.outlines) {
o
..decompactImplicitPoints()
..compactImplicitPoints();
}
}
final simpleList =
genericList.map((e) => e.toSimpleTrueTypeGlyph()).toList();
// Those were compacted more than they were originally. Expecting just new size.
final changedForReason = {
1: 87,
34: 66,
53: 121,
70: 90,
115: 60,
138: 90,
};
for (var i = 0; i < genericList.length; i++) {
final newLength = simpleList[i].pointList.length;
final expectedLength =
changedForReason[i] ?? font.glyf.glyphList[i].pointList.length;
expect(newLength, expectedLength);
}
});
// TODO: !!! quad->cubic outline test
// TODO: !!! generic->charstring test
// TODO: !!! generic->simpleglyph test
});
group('Utils', () {
const testString = '[INFO] :谷���新道, ひば���ヶ丘２丁���,'
' ひばりヶ���, 東久留米市 (Higashikurume)';
test('Printable ASCII string', () {
const expectedString = 'INFO :, , , Higashikurume';
expect(testString.getAsciiPrintable(), expectedString);
});
test('PostScript ASCII string', () {
const expectedString = 'INFO:,,,Higashikurume';
expect(testString.getPostScriptString(), expectedString);
});
});
}
const _kPOSTformat20indicies = [
258,
259,
260,
261,
262,
263,
264,
265,
266,
267,
268,
269,
270,
271,
272,
273,
274,
275,
276,
277,
278,
279,
280,
281,
282,
283,
284,
285,
286,
287,
288,
289,
290,
291,
292,
293,
294,
295,
296,
297,
298,
299,
300,
301,
302,
303,
304,
305,
306,
307,
308,
309,
310,
311,
312,
313,
314,
315,
316,
317,
318,
319,
320,
321,
322,
323,
324,
325,
326,
327,
328,
329,
330,
331,
332,
333,
334,
335,
336,
337,
338,
339,
340,
341,
342,
343,
344,
345,
346,
347,
348,
349,
350,
351,
352,
353,
354,
355,
356,
357,
358,
359,
360,
361,
362,
363,
364,
365,
366,
367,
368,
369,
370,
371,
372,
373,
374,
375,
376,
377,
378,
379,
380,
381,
382,
383,
384,
385,
386,
387,
388,
389,
390,
391,
392,
393,
394,
395,
396,
397,
398,
399,
400,
401,
402,
403,
404,
405,
406,
407,
408,
409,
410,
411,
412,
413,
414,
415,
416,
417,
418,
419,
420,
421,
422,
423
];
const _kPOSTformat20names = [
'',
'calend_rainbow',
'fav_group',
'hamburger',
'menu_notif',
'note-1',
'arrow-small-left',
'checklist',
'diff-modified',
'plus',
'pin',
'database',
'markdown',
'unverified',
'mark-github',
'globe',
'light-bulb',
'watch',
'primitive-dot',
'bookmark',
'gift',
'file-directory',
'versions',
'triangle-up',
'issue-closed',
'tag',
'book',
'git-commit',
'mail-read',
'repo-push',
'ellipsis',
'lock',
'terminal',
'key',
'tasklist',
'repo',
'shield-lock',
'pulse',
'triangle-down',
'credit-card',
'diff-ignored',
'file-submodule',
'primitive-square',
'mute',
'unmute',
'heart-outline',
'sync',
'beaker',
'reply',
'italic',
'diff-renamed',
'plus-small',
'dash',
'list-unordered',
'pencil',
'question',
'primitive-dot-stroke',
'saved',
'unfold',
'rss',
'arrow-small-down',
'line-arrow-down',
'fold',
'sign-out',
'issue-opened',
'file-code',
'trashcan',
'star',
'shield-check',
'repo-template',
'thumbsup',
'shield-x',
'logo-gist',
'report',
'mention',
'cloud-download',
'git-branch',
'squirrel',
'desktop-download',
'kebab-vertical',
'line-arrow-left',
'clippy',
'megaphone',
'repo-clone',
'workflow',
'arrow-up',
'chevron-up',
'plug',
'comment',
'location',
'kebab-horizontal',
'link-external',
'link',
'code',
'history',
'stop',
'graph',
'file-media',
'text-size',
'no-newline',
'gear',
'home',
'device-camera-video',
'diff-added',
'arrow-both',
'circuit-board',
'repo-pull',
'sign-in',
'eye-closed',
'north-star',
'internal-repo',
'check',
'law',
'cloud-upload',
'settings',
'three-bars',
'flame',
'horizontal-rule',
'chevron-right',
'chevron-left',
'repo-template-private',
'github-action',
'broadcast',
'archive',
'note',
'milestone',
'project',
'device-mobile',
'line-arrow-right',
'arrow-small-right',
'arrow-right',
'inbox',
'repo-forked',
'line-arrow-up',
'tools',
'jersey',
'device-desktop',
'package',
'thumbsdown',
'dashboard',
'play',
'dependent',
'rocket',
'calendar',
'smiley',
'issue-reopened',
'clock',
'mirror',
'shield',
'file-symlink-directory',
'browser',
'server',
'triangle-right',
'radio-tower',
'mail',
'arrow-down',
'diff-removed',
'hubot',
'file',
'gist-secret',
'x',
'screen-normal',
'infinity',
'mortar-board',
'alert',
'file-pdf'
];
const _kCMAPcharCodes = [
59414,
59430,
59436,
59444,
59446,
62208,
62209,
62210,
62211,
62212,
62213,
62214,
62215,
62216,
62217,
62218,
62219,
62220,
62221,
62222,
62223,
62224,
62225,
62226,
62227,
62228,
62229,
62230,
62231,
62232,
62233,
62234,
62235,
62236,
62237,
62238,
62239,
62240,
62241,
62242,
62243,
62244,
62245,
62246,
62247,
62248,
62249,
62250,
62251,
62252,
62253,
62254,
62255,
62256,
62257,
62258,
62259,
62260,
62261,
62262,
62263,
62264,
62265,
62266,
62267,
62268,
62269,
62270,
62271,
62272,
62273,
62274,
62275,
62276,
62277,
62278,
62279,
62280,
62281,
62282,
62283,
62284,
62285,
62286,
62287,
62288,
62289,
62290,
62291,
62292,
62293,
62294,
62295,
62296,
62297,
62298,
62299,
62300,
62301,
62302,
62303,
62304,
62305,
62306,
62307,
62308,
62309,
62310,
62311,
62312,
62313,
62314,
62315,
62316,
62317,
62318,
62319,
62320,
62321,
62322,
62323,
62324,
62325,
62326,
62327,
62328,
62329,
62330,
62331,
62332,
62333,
62334,
62335,
62336,
62337,
62338,
62339,
62340,
62341,
62342,
62343,
62344,
62345,
62346,
62347,
62348,
62349,
62350,
62351,
62352,
62353,
62354,
62355,