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How to use buffer method in Puppeteer
Best JavaScript code snippet using puppeteer
tokenize.js
Source:tokenize.js 
1var Marker = require('./marker');2var Token = require('./token');3var formatPosition = require('../utils/format-position');4var Level = {5 BLOCK: 'block',6 COMMENT: 'comment',7 DOUBLE_QUOTE: 'double-quote',8 RULE: 'rule',9 SINGLE_QUOTE: 'single-quote'10};11var AT_RULES = [12 '@charset',13 '@import'14];15var BLOCK_RULES = [16 '@-moz-document',17 '@document',18 '@-moz-keyframes',19 '@-ms-keyframes',20 '@-o-keyframes',21 '@-webkit-keyframes',22 '@keyframes',23 '@media',24 '@supports'25];26var IGNORE_END_COMMENT_PATTERN = /\/\* clean\-css ignore:end \*\/$/;27var IGNORE_START_COMMENT_PATTERN = /^\/\* clean\-css ignore:start \*\//;28var PAGE_MARGIN_BOXES = [29 '@bottom-center',30 '@bottom-left',31 '@bottom-left-corner',32 '@bottom-right',33 '@bottom-right-corner',34 '@left-bottom',35 '@left-middle',36 '@left-top',37 '@right-bottom',38 '@right-middle',39 '@right-top',40 '@top-center',41 '@top-left',42 '@top-left-corner',43 '@top-right',44 '@top-right-corner'45];46var EXTRA_PAGE_BOXES = [47 '@footnote',48 '@footnotes',49 '@left',50 '@page-float-bottom',51 '@page-float-top',52 '@right'53];54var REPEAT_PATTERN = /^\[\s{0,31}\d+\s{0,31}\]$/;55var RULE_WORD_SEPARATOR_PATTERN = /[\s\(]/;56var TAIL_BROKEN_VALUE_PATTERN = /[\s|\}]*$/;57function tokenize(source, externalContext) {58 var internalContext = {59 level: Level.BLOCK,60 position: {61 source: externalContext.source || undefined,62 line: 1,63 column: 0,64 index: 065 }66 };67 return intoTokens(source, externalContext, internalContext, false);68}69function intoTokens(source, externalContext, internalContext, isNested) {70 var allTokens = [];71 var newTokens = allTokens;72 var lastToken;73 var ruleToken;74 var ruleTokens = [];75 var propertyToken;76 var metadata;77 var metadatas = [];78 var level = internalContext.level;79 var levels = [];80 var buffer = [];81 var buffers = [];82 var serializedBuffer;83 var serializedBufferPart;84 var roundBracketLevel = 0;85 var isQuoted;86 var isSpace;87 var isNewLineNix;88 var isNewLineWin;89 var isCarriageReturn;90 var isCommentStart;91 var wasCommentStart = false;92 var isCommentEnd;93 var wasCommentEnd = false;94 var isCommentEndMarker;95 var isEscaped;96 var wasEscaped = false;97 var isRaw = false;98 var seekingValue = false;99 var seekingPropertyBlockClosing = false;100 var position = internalContext.position;101 var lastCommentStartAt;102 for (; position.index < source.length; position.index++) {103 var character = source[position.index];104 isQuoted = level == Level.SINGLE_QUOTE || level == Level.DOUBLE_QUOTE;105 isSpace = character == Marker.SPACE || character == Marker.TAB;106 isNewLineNix = character == Marker.NEW_LINE_NIX;107 isNewLineWin = character == Marker.NEW_LINE_NIX && source[position.index - 1] == Marker.CARRIAGE_RETURN;108 isCarriageReturn = character == Marker.CARRIAGE_RETURN && source[position.index + 1] && source[position.index + 1] != Marker.NEW_LINE_NIX;109 isCommentStart = !wasCommentEnd && level != Level.COMMENT && !isQuoted && character == Marker.ASTERISK && source[position.index - 1] == Marker.FORWARD_SLASH;110 isCommentEndMarker = !wasCommentStart && !isQuoted && character == Marker.FORWARD_SLASH && source[position.index - 1] == Marker.ASTERISK;111 isCommentEnd = level == Level.COMMENT && isCommentEndMarker;112 roundBracketLevel = Math.max(roundBracketLevel, 0);113 metadata = buffer.length === 0 ?114 [position.line, position.column, position.source] :115 metadata;116 if (isEscaped) {117 // previous character was a backslash118 buffer.push(character);119 } else if (!isCommentEnd && level == Level.COMMENT) {120 buffer.push(character);121 } else if (!isCommentStart && !isCommentEnd && isRaw) {122 buffer.push(character);123 } else if (isCommentStart && (level == Level.BLOCK || level == Level.RULE) && buffer.length > 1) {124 // comment start within block preceded by some content, e.g. div/*<--125 metadatas.push(metadata);126 buffer.push(character);127 buffers.push(buffer.slice(0, buffer.length - 2));128 buffer = buffer.slice(buffer.length - 2);129 metadata = [position.line, position.column - 1, position.source];130 levels.push(level);131 level = Level.COMMENT;132 } else if (isCommentStart) {133 // comment start, e.g. /*<--134 levels.push(level);135 level = Level.COMMENT;136 buffer.push(character);137 } else if (isCommentEnd && isIgnoreStartComment(buffer)) {138 // ignore:start comment end, e.g. /* clean-css ignore:start */<--139 serializedBuffer = buffer.join('').trim() + character;140 lastToken = [Token.COMMENT, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]];141 newTokens.push(lastToken);142 isRaw = true;143 metadata = metadatas.pop() || null;144 buffer = buffers.pop() || [];145 } else if (isCommentEnd && isIgnoreEndComment(buffer)) {146 // ignore:start comment end, e.g. /* clean-css ignore:end */<--147 serializedBuffer = buffer.join('') + character;148 lastCommentStartAt = serializedBuffer.lastIndexOf(Marker.FORWARD_SLASH + Marker.ASTERISK);149 serializedBufferPart = serializedBuffer.substring(0, lastCommentStartAt);150 lastToken = [Token.RAW, serializedBufferPart, [originalMetadata(metadata, serializedBufferPart, externalContext)]];151 newTokens.push(lastToken);152 serializedBufferPart = serializedBuffer.substring(lastCommentStartAt);153 metadata = [position.line, position.column - serializedBufferPart.length + 1, position.source];154 lastToken = [Token.COMMENT, serializedBufferPart, [originalMetadata(metadata, serializedBufferPart, externalContext)]];155 newTokens.push(lastToken);156 isRaw = false;157 level = levels.pop();158 metadata = metadatas.pop() || null;159 buffer = buffers.pop() || [];160 } else if (isCommentEnd) {161 // comment end, e.g. /* comment */<--162 serializedBuffer = buffer.join('').trim() + character;163 lastToken = [Token.COMMENT, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]];164 newTokens.push(lastToken);165 level = levels.pop();166 metadata = metadatas.pop() || null;167 buffer = buffers.pop() || [];168 } else if (isCommentEndMarker && source[position.index + 1] != Marker.ASTERISK) {169 externalContext.warnings.push('Unexpected \'*/\' at ' + formatPosition([position.line, position.column, position.source]) + '.');170 buffer = [];171 } else if (character == Marker.SINGLE_QUOTE && !isQuoted) {172 // single quotation start, e.g. a[href^='https<--173 levels.push(level);174 level = Level.SINGLE_QUOTE;175 buffer.push(character);176 } else if (character == Marker.SINGLE_QUOTE && level == Level.SINGLE_QUOTE) {177 // single quotation end, e.g. a[href^='https'<--178 level = levels.pop();179 buffer.push(character);180 } else if (character == Marker.DOUBLE_QUOTE && !isQuoted) {181 // double quotation start, e.g. a[href^="<--182 levels.push(level);183 level = Level.DOUBLE_QUOTE;184 buffer.push(character);185 } else if (character == Marker.DOUBLE_QUOTE && level == Level.DOUBLE_QUOTE) {186 // double quotation end, e.g. a[href^="https"<--187 level = levels.pop();188 buffer.push(character);189 } else if (!isCommentStart && !isCommentEnd && character != Marker.CLOSE_ROUND_BRACKET && character != Marker.OPEN_ROUND_BRACKET && level != Level.COMMENT && !isQuoted && roundBracketLevel > 0) {190 // character inside any function, e.g. hsla(.<--191 buffer.push(character);192 } else if (character == Marker.OPEN_ROUND_BRACKET && !isQuoted && level != Level.COMMENT && !seekingValue) {193 // round open bracket, e.g. @import url(<--194 buffer.push(character);195 roundBracketLevel++;196 } else if (character == Marker.CLOSE_ROUND_BRACKET && !isQuoted && level != Level.COMMENT && !seekingValue) {197 // round open bracket, e.g. @import url(test.css)<--198 buffer.push(character);199 roundBracketLevel--;200 } else if (character == Marker.SEMICOLON && level == Level.BLOCK && buffer[0] == Marker.AT) {201 // semicolon ending rule at block level, e.g. @import '...';<--202 serializedBuffer = buffer.join('').trim();203 allTokens.push([Token.AT_RULE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);204 buffer = [];205 } else if (character == Marker.COMMA && level == Level.BLOCK && ruleToken) {206 // comma separator at block level, e.g. a,div,<--207 serializedBuffer = buffer.join('').trim();208 ruleToken[1].push([tokenScopeFrom(ruleToken[0]), serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext, ruleToken[1].length)]]);209 buffer = [];210 } else if (character == Marker.COMMA && level == Level.BLOCK && tokenTypeFrom(buffer) == Token.AT_RULE) {211 // comma separator at block level, e.g. @import url(...) screen,<--212 // keep iterating as end semicolon will create the token213 buffer.push(character);214 } else if (character == Marker.COMMA && level == Level.BLOCK) {215 // comma separator at block level, e.g. a,<--216 ruleToken = [tokenTypeFrom(buffer), [], []];217 serializedBuffer = buffer.join('').trim();218 ruleToken[1].push([tokenScopeFrom(ruleToken[0]), serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext, 0)]]);219 buffer = [];220 } else if (character == Marker.OPEN_CURLY_BRACKET && level == Level.BLOCK && ruleToken && ruleToken[0] == Token.NESTED_BLOCK) {221 // open brace opening at-rule at block level, e.g. @media{<--222 serializedBuffer = buffer.join('').trim();223 ruleToken[1].push([Token.NESTED_BLOCK_SCOPE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);224 allTokens.push(ruleToken);225 levels.push(level);226 position.column++;227 position.index++;228 buffer = [];229 ruleToken[2] = intoTokens(source, externalContext, internalContext, true);230 ruleToken = null;231 } else if (character == Marker.OPEN_CURLY_BRACKET && level == Level.BLOCK && tokenTypeFrom(buffer) == Token.NESTED_BLOCK) {232 // open brace opening at-rule at block level, e.g. @media{<--233 serializedBuffer = buffer.join('').trim();234 ruleToken = ruleToken || [Token.NESTED_BLOCK, [], []];235 ruleToken[1].push([Token.NESTED_BLOCK_SCOPE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);236 allTokens.push(ruleToken);237 levels.push(level);238 position.column++;239 position.index++;240 buffer = [];241 ruleToken[2] = intoTokens(source, externalContext, internalContext, true);242 ruleToken = null;243 } else if (character == Marker.OPEN_CURLY_BRACKET && level == Level.BLOCK) {244 // open brace opening rule at block level, e.g. div{<--245 serializedBuffer = buffer.join('').trim();246 ruleToken = ruleToken || [tokenTypeFrom(buffer), [], []];247 ruleToken[1].push([tokenScopeFrom(ruleToken[0]), serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext, ruleToken[1].length)]]);248 newTokens = ruleToken[2];249 allTokens.push(ruleToken);250 levels.push(level);251 level = Level.RULE;252 buffer = [];253 } else if (character == Marker.OPEN_CURLY_BRACKET && level == Level.RULE && seekingValue) {254 // open brace opening rule at rule level, e.g. div{--variable:{<--255 ruleTokens.push(ruleToken);256 ruleToken = [Token.PROPERTY_BLOCK, []];257 propertyToken.push(ruleToken);258 newTokens = ruleToken[1];259 levels.push(level);260 level = Level.RULE;261 seekingValue = false;262 } else if (character == Marker.OPEN_CURLY_BRACKET && level == Level.RULE && isPageMarginBox(buffer)) {263 // open brace opening page-margin box at rule level, e.g. @page{@top-center{<--264 serializedBuffer = buffer.join('').trim();265 ruleTokens.push(ruleToken);266 ruleToken = [Token.AT_RULE_BLOCK, [], []];267 ruleToken[1].push([Token.AT_RULE_BLOCK_SCOPE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);268 newTokens.push(ruleToken);269 newTokens = ruleToken[2];270 levels.push(level);271 level = Level.RULE;272 buffer = [];273 } else if (character == Marker.COLON && level == Level.RULE && !seekingValue) {274 // colon at rule level, e.g. a{color:<--275 serializedBuffer = buffer.join('').trim();276 propertyToken = [Token.PROPERTY, [Token.PROPERTY_NAME, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]];277 newTokens.push(propertyToken);278 seekingValue = true;279 buffer = [];280 } else if (character == Marker.SEMICOLON && level == Level.RULE && propertyToken && ruleTokens.length > 0 && buffer.length > 0 && buffer[0] == Marker.AT) {281 // semicolon at rule level for at-rule, e.g. a{--color:{@apply(--other-color);<--282 serializedBuffer = buffer.join('').trim();283 ruleToken[1].push([Token.AT_RULE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);284 buffer = [];285 } else if (character == Marker.SEMICOLON && level == Level.RULE && propertyToken && buffer.length > 0) {286 // semicolon at rule level, e.g. a{color:red;<--287 serializedBuffer = buffer.join('').trim();288 propertyToken.push([Token.PROPERTY_VALUE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);289 propertyToken = null;290 seekingValue = false;291 buffer = [];292 } else if (character == Marker.SEMICOLON && level == Level.RULE && propertyToken && buffer.length === 0) {293 // semicolon after bracketed value at rule level, e.g. a{color:rgb(...);<--294 propertyToken = null;295 seekingValue = false;296 } else if (character == Marker.SEMICOLON && level == Level.RULE && buffer.length > 0 && buffer[0] == Marker.AT) {297 // semicolon for at-rule at rule level, e.g. a{@apply(--variable);<--298 serializedBuffer = buffer.join('');299 newTokens.push([Token.AT_RULE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);300 seekingValue = false;301 buffer = [];302 } else if (character == Marker.SEMICOLON && level == Level.RULE && seekingPropertyBlockClosing) {303 // close brace after a property block at rule level, e.g. a{--custom:{color:red;};<--304 seekingPropertyBlockClosing = false;305 buffer = [];306 } else if (character == Marker.SEMICOLON && level == Level.RULE && buffer.length === 0) {307 // stray semicolon at rule level, e.g. a{;<--308 // noop309 } else if (character == Marker.CLOSE_CURLY_BRACKET && level == Level.RULE && propertyToken && seekingValue && buffer.length > 0 && ruleTokens.length > 0) {310 // close brace at rule level, e.g. a{--color:{color:red}<--311 serializedBuffer = buffer.join('');312 propertyToken.push([Token.PROPERTY_VALUE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);313 propertyToken = null;314 ruleToken = ruleTokens.pop();315 newTokens = ruleToken[2];316 level = levels.pop();317 seekingValue = false;318 buffer = [];319 } else if (character == Marker.CLOSE_CURLY_BRACKET && level == Level.RULE && propertyToken && buffer.length > 0 && buffer[0] == Marker.AT && ruleTokens.length > 0) {320 // close brace at rule level for at-rule, e.g. a{--color:{@apply(--other-color)}<--321 serializedBuffer = buffer.join('');322 ruleToken[1].push([Token.AT_RULE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);323 propertyToken = null;324 ruleToken = ruleTokens.pop();325 newTokens = ruleToken[2];326 level = levels.pop();327 seekingValue = false;328 buffer = [];329 } else if (character == Marker.CLOSE_CURLY_BRACKET && level == Level.RULE && propertyToken && ruleTokens.length > 0) {330 // close brace at rule level after space, e.g. a{--color:{color:red }<--331 propertyToken = null;332 ruleToken = ruleTokens.pop();333 newTokens = ruleToken[2];334 level = levels.pop();335 seekingValue = false;336 } else if (character == Marker.CLOSE_CURLY_BRACKET && level == Level.RULE && propertyToken && buffer.length > 0) {337 // close brace at rule level, e.g. a{color:red}<--338 serializedBuffer = buffer.join('');339 propertyToken.push([Token.PROPERTY_VALUE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);340 propertyToken = null;341 ruleToken = ruleTokens.pop();342 newTokens = allTokens;343 level = levels.pop();344 seekingValue = false;345 buffer = [];346 } else if (character == Marker.CLOSE_CURLY_BRACKET && level == Level.RULE && buffer.length > 0 && buffer[0] == Marker.AT) {347 // close brace after at-rule at rule level, e.g. a{@apply(--variable)}<--348 propertyToken = null;349 ruleToken = null;350 serializedBuffer = buffer.join('').trim();351 newTokens.push([Token.AT_RULE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);352 newTokens = allTokens;353 level = levels.pop();354 seekingValue = false;355 buffer = [];356 } else if (character == Marker.CLOSE_CURLY_BRACKET && level == Level.RULE && levels[levels.length - 1] == Level.RULE) {357 // close brace after a property block at rule level, e.g. a{--custom:{color:red;}<--358 propertyToken = null;359 ruleToken = ruleTokens.pop();360 newTokens = ruleToken[2];361 level = levels.pop();362 seekingValue = false;363 seekingPropertyBlockClosing = true;364 buffer = [];365 } else if (character == Marker.CLOSE_CURLY_BRACKET && level == Level.RULE) {366 // close brace after a rule, e.g. a{color:red;}<--367 propertyToken = null;368 ruleToken = null;369 newTokens = allTokens;370 level = levels.pop();371 seekingValue = false;372 } else if (character == Marker.CLOSE_CURLY_BRACKET && level == Level.BLOCK && !isNested && position.index <= source.length - 1) {373 // stray close brace at block level, e.g. a{color:red}color:blue}<--374 externalContext.warnings.push('Unexpected \'}\' at ' + formatPosition([position.line, position.column, position.source]) + '.');375 buffer.push(character);376 } else if (character == Marker.CLOSE_CURLY_BRACKET && level == Level.BLOCK) {377 // close brace at block level, e.g. @media screen {...}<--378 break;379 } else if (character == Marker.OPEN_ROUND_BRACKET && level == Level.RULE && seekingValue) {380 // round open bracket, e.g. a{color:hsla(<--381 buffer.push(character);382 roundBracketLevel++;383 } else if (character == Marker.CLOSE_ROUND_BRACKET && level == Level.RULE && seekingValue && roundBracketLevel == 1) {384 // round close bracket, e.g. a{color:hsla(0,0%,0%)<--385 buffer.push(character);386 serializedBuffer = buffer.join('').trim();387 propertyToken.push([Token.PROPERTY_VALUE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);388 roundBracketLevel--;389 buffer = [];390 } else if (character == Marker.CLOSE_ROUND_BRACKET && level == Level.RULE && seekingValue) {391 // round close bracket within other brackets, e.g. a{width:calc((10rem / 2)<--392 buffer.push(character);393 roundBracketLevel--;394 } else if (character == Marker.FORWARD_SLASH && source[position.index + 1] != Marker.ASTERISK && level == Level.RULE && seekingValue && buffer.length > 0) {395 // forward slash within a property, e.g. a{background:url(image.png) 0 0/<--396 serializedBuffer = buffer.join('').trim();397 propertyToken.push([Token.PROPERTY_VALUE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);398 propertyToken.push([Token.PROPERTY_VALUE, character, [[position.line, position.column, position.source]]]);399 buffer = [];400 } else if (character == Marker.FORWARD_SLASH && source[position.index + 1] != Marker.ASTERISK && level == Level.RULE && seekingValue) {401 // forward slash within a property after space, e.g. a{background:url(image.png) 0 0 /<--402 propertyToken.push([Token.PROPERTY_VALUE, character, [[position.line, position.column, position.source]]]);403 buffer = [];404 } else if (character == Marker.COMMA && level == Level.RULE && seekingValue && buffer.length > 0) {405 // comma within a property, e.g. a{background:url(image.png),<--406 serializedBuffer = buffer.join('').trim();407 propertyToken.push([Token.PROPERTY_VALUE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);408 propertyToken.push([Token.PROPERTY_VALUE, character, [[position.line, position.column, position.source]]]);409 buffer = [];410 } else if (character == Marker.COMMA && level == Level.RULE && seekingValue) {411 // comma within a property after space, e.g. a{background:url(image.png) ,<--412 propertyToken.push([Token.PROPERTY_VALUE, character, [[position.line, position.column, position.source]]]);413 buffer = [];414 } else if (character == Marker.CLOSE_SQUARE_BRACKET && propertyToken && propertyToken.length > 1 && buffer.length > 0 && isRepeatToken(buffer)) {415 buffer.push(character);416 serializedBuffer = buffer.join('').trim();417 propertyToken[propertyToken.length - 1][1] += serializedBuffer;418 buffer = [];419 } else if ((isSpace || (isNewLineNix && !isNewLineWin)) && level == Level.RULE && seekingValue && propertyToken && buffer.length > 0) {420 // space or *nix newline within property, e.g. a{margin:0 <--421 serializedBuffer = buffer.join('').trim();422 propertyToken.push([Token.PROPERTY_VALUE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);423 buffer = [];424 } else if (isNewLineWin && level == Level.RULE && seekingValue && propertyToken && buffer.length > 1) {425 // win newline within property, e.g. a{margin:0\r\n<--426 serializedBuffer = buffer.join('').trim();427 propertyToken.push([Token.PROPERTY_VALUE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);428 buffer = [];429 } else if (isNewLineWin && level == Level.RULE && seekingValue) {430 // win newline431 buffer = [];432 } else if (buffer.length == 1 && isNewLineWin) {433 // ignore windows newline which is composed of two characters434 buffer.pop();435 } else if (buffer.length > 0 || !isSpace && !isNewLineNix && !isNewLineWin && !isCarriageReturn) {436 // any character437 buffer.push(character);438 }439 wasEscaped = isEscaped;440 isEscaped = !wasEscaped && character == Marker.BACK_SLASH;441 wasCommentStart = isCommentStart;442 wasCommentEnd = isCommentEnd;443 position.line = (isNewLineWin || isNewLineNix || isCarriageReturn) ? position.line + 1 : position.line;444 position.column = (isNewLineWin || isNewLineNix || isCarriageReturn) ? 0 : position.column + 1;445 }446 if (seekingValue) {447 externalContext.warnings.push('Missing \'}\' at ' + formatPosition([position.line, position.column, position.source]) + '.');448 }449 if (seekingValue && buffer.length > 0) {450 serializedBuffer = buffer.join('').replace(TAIL_BROKEN_VALUE_PATTERN, '');451 propertyToken.push([Token.PROPERTY_VALUE, serializedBuffer, [originalMetadata(metadata, serializedBuffer, externalContext)]]);452 buffer = [];453 }454 if (buffer.length > 0) {455 externalContext.warnings.push('Invalid character(s) \'' + buffer.join('') + '\' at ' + formatPosition(metadata) + '. Ignoring.');456 }457 return allTokens;458}459function isIgnoreStartComment(buffer) {460 return IGNORE_START_COMMENT_PATTERN.test(buffer.join('') + Marker.FORWARD_SLASH);461}462function isIgnoreEndComment(buffer) {463 return IGNORE_END_COMMENT_PATTERN.test(buffer.join('') + Marker.FORWARD_SLASH);464}465function originalMetadata(metadata, value, externalContext, selectorFallbacks) {466 var source = metadata[2];467 return externalContext.inputSourceMapTracker.isTracking(source) ?468 externalContext.inputSourceMapTracker.originalPositionFor(metadata, value.length, selectorFallbacks) :469 metadata;470}471function tokenTypeFrom(buffer) {472 var isAtRule = buffer[0] == Marker.AT || buffer[0] == Marker.UNDERSCORE;473 var ruleWord = buffer.join('').split(RULE_WORD_SEPARATOR_PATTERN)[0];474 if (isAtRule && BLOCK_RULES.indexOf(ruleWord) > -1) {475 return Token.NESTED_BLOCK;476 } else if (isAtRule && AT_RULES.indexOf(ruleWord) > -1) {477 return Token.AT_RULE;478 } else if (isAtRule) {479 return Token.AT_RULE_BLOCK;480 } else {481 return Token.RULE;482 }483}484function tokenScopeFrom(tokenType) {485 if (tokenType == Token.RULE) {486 return Token.RULE_SCOPE;487 } else if (tokenType == Token.NESTED_BLOCK) {488 return Token.NESTED_BLOCK_SCOPE;489 } else if (tokenType == Token.AT_RULE_BLOCK) {490 return Token.AT_RULE_BLOCK_SCOPE;491 }492}493function isPageMarginBox(buffer) {494 var serializedBuffer = buffer.join('').trim();495 return PAGE_MARGIN_BOXES.indexOf(serializedBuffer) > -1 || EXTRA_PAGE_BOXES.indexOf(serializedBuffer) > -1;496}497function isRepeatToken(buffer) {498 return REPEAT_PATTERN.test(buffer.join('') + Marker.CLOSE_SQUARE_BRACKET);499}...
tests.js
Source:tests.js
1/* eslint-disable node/no-deprecated-api */2'use strict'3var test = require('tape')4var buffer = require('buffer')5var index = require('./')6var safer = require('./safer')7var dangerous = require('./dangerous')8/* Inheritance tests */9test('Default is Safer', function (t) {10 t.equal(index, safer)11 t.notEqual(safer, dangerous)12 t.notEqual(index, dangerous)13 t.end()14})15test('Is not a function', function (t) {16 [index, safer, dangerous].forEach(function (impl) {17 t.equal(typeof impl, 'object')18 t.equal(typeof impl.Buffer, 'object')19 });20 [buffer].forEach(function (impl) {21 t.equal(typeof impl, 'object')22 t.equal(typeof impl.Buffer, 'function')23 })24 t.end()25})26test('Constructor throws', function (t) {27 [index, safer, dangerous].forEach(function (impl) {28 t.throws(function () { impl.Buffer() })29 t.throws(function () { impl.Buffer(0) })30 t.throws(function () { impl.Buffer('a') })31 t.throws(function () { impl.Buffer('a', 'utf-8') })32 t.throws(function () { return new impl.Buffer() })33 t.throws(function () { return new impl.Buffer(0) })34 t.throws(function () { return new impl.Buffer('a') })35 t.throws(function () { return new impl.Buffer('a', 'utf-8') })36 })37 t.end()38})39test('Safe methods exist', function (t) {40 [index, safer, dangerous].forEach(function (impl) {41 t.equal(typeof impl.Buffer.alloc, 'function', 'alloc')42 t.equal(typeof impl.Buffer.from, 'function', 'from')43 })44 t.end()45})46test('Unsafe methods exist only in Dangerous', function (t) {47 [index, safer].forEach(function (impl) {48 t.equal(typeof impl.Buffer.allocUnsafe, 'undefined')49 t.equal(typeof impl.Buffer.allocUnsafeSlow, 'undefined')50 });51 [dangerous].forEach(function (impl) {52 t.equal(typeof impl.Buffer.allocUnsafe, 'function')53 t.equal(typeof impl.Buffer.allocUnsafeSlow, 'function')54 })55 t.end()56})57test('Generic methods/properties are defined and equal', function (t) {58 ['poolSize', 'isBuffer', 'concat', 'byteLength'].forEach(function (method) {59 [index, safer, dangerous].forEach(function (impl) {60 t.equal(impl.Buffer[method], buffer.Buffer[method], method)61 t.notEqual(typeof impl.Buffer[method], 'undefined', method)62 })63 })64 t.end()65})66test('Built-in buffer static methods/properties are inherited', function (t) {67 Object.keys(buffer).forEach(function (method) {68 if (method === 'SlowBuffer' || method === 'Buffer') return;69 [index, safer, dangerous].forEach(function (impl) {70 t.equal(impl[method], buffer[method], method)71 t.notEqual(typeof impl[method], 'undefined', method)72 })73 })74 t.end()75})76test('Built-in Buffer static methods/properties are inherited', function (t) {77 Object.keys(buffer.Buffer).forEach(function (method) {78 if (method === 'allocUnsafe' || method === 'allocUnsafeSlow') return;79 [index, safer, dangerous].forEach(function (impl) {80 t.equal(impl.Buffer[method], buffer.Buffer[method], method)81 t.notEqual(typeof impl.Buffer[method], 'undefined', method)82 })83 })84 t.end()85})86test('.prototype property of Buffer is inherited', function (t) {87 [index, safer, dangerous].forEach(function (impl) {88 t.equal(impl.Buffer.prototype, buffer.Buffer.prototype, 'prototype')89 t.notEqual(typeof impl.Buffer.prototype, 'undefined', 'prototype')90 })91 t.end()92})93test('All Safer methods are present in Dangerous', function (t) {94 Object.keys(safer).forEach(function (method) {95 if (method === 'Buffer') return;96 [index, safer, dangerous].forEach(function (impl) {97 t.equal(impl[method], safer[method], method)98 if (method !== 'kStringMaxLength') {99 t.notEqual(typeof impl[method], 'undefined', method)100 }101 })102 })103 Object.keys(safer.Buffer).forEach(function (method) {104 [index, safer, dangerous].forEach(function (impl) {105 t.equal(impl.Buffer[method], safer.Buffer[method], method)106 t.notEqual(typeof impl.Buffer[method], 'undefined', method)107 })108 })109 t.end()110})111test('Safe methods from Dangerous methods are present in Safer', function (t) {112 Object.keys(dangerous).forEach(function (method) {113 if (method === 'Buffer') return;114 [index, safer, dangerous].forEach(function (impl) {115 t.equal(impl[method], dangerous[method], method)116 if (method !== 'kStringMaxLength') {117 t.notEqual(typeof impl[method], 'undefined', method)118 }119 })120 })121 Object.keys(dangerous.Buffer).forEach(function (method) {122 if (method === 'allocUnsafe' || method === 'allocUnsafeSlow') return;123 [index, safer, dangerous].forEach(function (impl) {124 t.equal(impl.Buffer[method], dangerous.Buffer[method], method)125 t.notEqual(typeof impl.Buffer[method], 'undefined', method)126 })127 })128 t.end()129})130/* Behaviour tests */131test('Methods return Buffers', function (t) {132 [index, safer, dangerous].forEach(function (impl) {133 t.ok(buffer.Buffer.isBuffer(impl.Buffer.alloc(0)))134 t.ok(buffer.Buffer.isBuffer(impl.Buffer.alloc(0, 10)))135 t.ok(buffer.Buffer.isBuffer(impl.Buffer.alloc(0, 'a')))136 t.ok(buffer.Buffer.isBuffer(impl.Buffer.alloc(10)))137 t.ok(buffer.Buffer.isBuffer(impl.Buffer.alloc(10, 'x')))138 t.ok(buffer.Buffer.isBuffer(impl.Buffer.alloc(9, 'ab')))139 t.ok(buffer.Buffer.isBuffer(impl.Buffer.from('')))140 t.ok(buffer.Buffer.isBuffer(impl.Buffer.from('string')))141 t.ok(buffer.Buffer.isBuffer(impl.Buffer.from('string', 'utf-8')))142 t.ok(buffer.Buffer.isBuffer(impl.Buffer.from('b25ldHdvdGhyZWU=', 'base64')))143 t.ok(buffer.Buffer.isBuffer(impl.Buffer.from([0, 42, 3])))144 t.ok(buffer.Buffer.isBuffer(impl.Buffer.from(new Uint8Array([0, 42, 3]))))145 t.ok(buffer.Buffer.isBuffer(impl.Buffer.from([])))146 });147 ['allocUnsafe', 'allocUnsafeSlow'].forEach(function (method) {148 t.ok(buffer.Buffer.isBuffer(dangerous.Buffer[method](0)))149 t.ok(buffer.Buffer.isBuffer(dangerous.Buffer[method](10)))150 })151 t.end()152})153test('Constructor is buffer.Buffer', function (t) {154 [index, safer, dangerous].forEach(function (impl) {155 t.equal(impl.Buffer.alloc(0).constructor, buffer.Buffer)156 t.equal(impl.Buffer.alloc(0, 10).constructor, buffer.Buffer)157 t.equal(impl.Buffer.alloc(0, 'a').constructor, buffer.Buffer)158 t.equal(impl.Buffer.alloc(10).constructor, buffer.Buffer)159 t.equal(impl.Buffer.alloc(10, 'x').constructor, buffer.Buffer)160 t.equal(impl.Buffer.alloc(9, 'ab').constructor, buffer.Buffer)161 t.equal(impl.Buffer.from('').constructor, buffer.Buffer)162 t.equal(impl.Buffer.from('string').constructor, buffer.Buffer)163 t.equal(impl.Buffer.from('string', 'utf-8').constructor, buffer.Buffer)164 t.equal(impl.Buffer.from('b25ldHdvdGhyZWU=', 'base64').constructor, buffer.Buffer)165 t.equal(impl.Buffer.from([0, 42, 3]).constructor, buffer.Buffer)166 t.equal(impl.Buffer.from(new Uint8Array([0, 42, 3])).constructor, buffer.Buffer)167 t.equal(impl.Buffer.from([]).constructor, buffer.Buffer)168 });169 [0, 10, 100].forEach(function (arg) {170 t.equal(dangerous.Buffer.allocUnsafe(arg).constructor, buffer.Buffer)171 t.equal(dangerous.Buffer.allocUnsafeSlow(arg).constructor, buffer.SlowBuffer(0).constructor)172 })173 t.end()174})175test('Invalid calls throw', function (t) {176 [index, safer, dangerous].forEach(function (impl) {177 t.throws(function () { impl.Buffer.from(0) })178 t.throws(function () { impl.Buffer.from(10) })179 t.throws(function () { impl.Buffer.from(10, 'utf-8') })180 t.throws(function () { impl.Buffer.from('string', 'invalid encoding') })181 t.throws(function () { impl.Buffer.from(-10) })182 t.throws(function () { impl.Buffer.from(1e90) })183 t.throws(function () { impl.Buffer.from(Infinity) })184 t.throws(function () { impl.Buffer.from(-Infinity) })185 t.throws(function () { impl.Buffer.from(NaN) })186 t.throws(function () { impl.Buffer.from(null) })187 t.throws(function () { impl.Buffer.from(undefined) })188 t.throws(function () { impl.Buffer.from() })189 t.throws(function () { impl.Buffer.from({}) })190 t.throws(function () { impl.Buffer.alloc('') })191 t.throws(function () { impl.Buffer.alloc('string') })192 t.throws(function () { impl.Buffer.alloc('string', 'utf-8') })193 t.throws(function () { impl.Buffer.alloc('b25ldHdvdGhyZWU=', 'base64') })194 t.throws(function () { impl.Buffer.alloc(-10) })195 t.throws(function () { impl.Buffer.alloc(1e90) })196 t.throws(function () { impl.Buffer.alloc(2 * (1 << 30)) })197 t.throws(function () { impl.Buffer.alloc(Infinity) })198 t.throws(function () { impl.Buffer.alloc(-Infinity) })199 t.throws(function () { impl.Buffer.alloc(null) })200 t.throws(function () { impl.Buffer.alloc(undefined) })201 t.throws(function () { impl.Buffer.alloc() })202 t.throws(function () { impl.Buffer.alloc([]) })203 t.throws(function () { impl.Buffer.alloc([0, 42, 3]) })204 t.throws(function () { impl.Buffer.alloc({}) })205 });206 ['allocUnsafe', 'allocUnsafeSlow'].forEach(function (method) {207 t.throws(function () { dangerous.Buffer[method]('') })208 t.throws(function () { dangerous.Buffer[method]('string') })209 t.throws(function () { dangerous.Buffer[method]('string', 'utf-8') })210 t.throws(function () { dangerous.Buffer[method](2 * (1 << 30)) })211 t.throws(function () { dangerous.Buffer[method](Infinity) })212 if (dangerous.Buffer[method] === buffer.Buffer.allocUnsafe) {213 t.skip('Skipping, older impl of allocUnsafe coerced negative sizes to 0')214 } else {215 t.throws(function () { dangerous.Buffer[method](-10) })216 t.throws(function () { dangerous.Buffer[method](-1e90) })217 t.throws(function () { dangerous.Buffer[method](-Infinity) })218 }219 t.throws(function () { dangerous.Buffer[method](null) })220 t.throws(function () { dangerous.Buffer[method](undefined) })221 t.throws(function () { dangerous.Buffer[method]() })222 t.throws(function () { dangerous.Buffer[method]([]) })223 t.throws(function () { dangerous.Buffer[method]([0, 42, 3]) })224 t.throws(function () { dangerous.Buffer[method]({}) })225 })226 t.end()227})228test('Buffers have appropriate lengths', function (t) {229 [index, safer, dangerous].forEach(function (impl) {230 t.equal(impl.Buffer.alloc(0).length, 0)231 t.equal(impl.Buffer.alloc(10).length, 10)232 t.equal(impl.Buffer.from('').length, 0)233 t.equal(impl.Buffer.from('string').length, 6)234 t.equal(impl.Buffer.from('string', 'utf-8').length, 6)235 t.equal(impl.Buffer.from('b25ldHdvdGhyZWU=', 'base64').length, 11)236 t.equal(impl.Buffer.from([0, 42, 3]).length, 3)237 t.equal(impl.Buffer.from(new Uint8Array([0, 42, 3])).length, 3)238 t.equal(impl.Buffer.from([]).length, 0)239 });240 ['allocUnsafe', 'allocUnsafeSlow'].forEach(function (method) {241 t.equal(dangerous.Buffer[method](0).length, 0)242 t.equal(dangerous.Buffer[method](10).length, 10)243 })244 t.end()245})246test('Buffers have appropriate lengths (2)', function (t) {247 t.equal(index.Buffer.alloc, safer.Buffer.alloc)248 t.equal(index.Buffer.alloc, dangerous.Buffer.alloc)249 var ok = true;250 [ safer.Buffer.alloc,251 dangerous.Buffer.allocUnsafe,252 dangerous.Buffer.allocUnsafeSlow253 ].forEach(function (method) {254 for (var i = 0; i < 1e2; i++) {255 var length = Math.round(Math.random() * 1e5)256 var buf = method(length)257 if (!buffer.Buffer.isBuffer(buf)) ok = false258 if (buf.length !== length) ok = false259 }260 })261 t.ok(ok)262 t.end()263})264test('.alloc(size) is zero-filled and has correct length', function (t) {265 t.equal(index.Buffer.alloc, safer.Buffer.alloc)266 t.equal(index.Buffer.alloc, dangerous.Buffer.alloc)267 var ok = true268 for (var i = 0; i < 1e2; i++) {269 var length = Math.round(Math.random() * 2e6)270 var buf = index.Buffer.alloc(length)271 if (!buffer.Buffer.isBuffer(buf)) ok = false272 if (buf.length !== length) ok = false273 var j274 for (j = 0; j < length; j++) {275 if (buf[j] !== 0) ok = false276 }277 buf.fill(1)278 for (j = 0; j < length; j++) {279 if (buf[j] !== 1) ok = false280 }281 }282 t.ok(ok)283 t.end()284})285test('.allocUnsafe / .allocUnsafeSlow are fillable and have correct lengths', function (t) {286 ['allocUnsafe', 'allocUnsafeSlow'].forEach(function (method) {287 var ok = true288 for (var i = 0; i < 1e2; i++) {289 var length = Math.round(Math.random() * 2e6)290 var buf = dangerous.Buffer[method](length)291 if (!buffer.Buffer.isBuffer(buf)) ok = false292 if (buf.length !== length) ok = false293 buf.fill(0, 0, length)294 var j295 for (j = 0; j < length; j++) {296 if (buf[j] !== 0) ok = false297 }298 buf.fill(1, 0, length)299 for (j = 0; j < length; j++) {300 if (buf[j] !== 1) ok = false301 }302 }303 t.ok(ok, method)304 })305 t.end()306})307test('.alloc(size, fill) is `fill`-filled', function (t) {308 t.equal(index.Buffer.alloc, safer.Buffer.alloc)309 t.equal(index.Buffer.alloc, dangerous.Buffer.alloc)310 var ok = true311 for (var i = 0; i < 1e2; i++) {312 var length = Math.round(Math.random() * 2e6)313 var fill = Math.round(Math.random() * 255)314 var buf = index.Buffer.alloc(length, fill)315 if (!buffer.Buffer.isBuffer(buf)) ok = false316 if (buf.length !== length) ok = false317 for (var j = 0; j < length; j++) {318 if (buf[j] !== fill) ok = false319 }320 }321 t.ok(ok)322 t.end()323})324test('.alloc(size, fill) is `fill`-filled', function (t) {325 t.equal(index.Buffer.alloc, safer.Buffer.alloc)326 t.equal(index.Buffer.alloc, dangerous.Buffer.alloc)327 var ok = true328 for (var i = 0; i < 1e2; i++) {329 var length = Math.round(Math.random() * 2e6)330 var fill = Math.round(Math.random() * 255)331 var buf = index.Buffer.alloc(length, fill)332 if (!buffer.Buffer.isBuffer(buf)) ok = false333 if (buf.length !== length) ok = false334 for (var j = 0; j < length; j++) {335 if (buf[j] !== fill) ok = false336 }337 }338 t.ok(ok)339 t.deepEqual(index.Buffer.alloc(9, 'a'), index.Buffer.alloc(9, 97))340 t.notDeepEqual(index.Buffer.alloc(9, 'a'), index.Buffer.alloc(9, 98))341 var tmp = new buffer.Buffer(2)342 tmp.fill('ok')343 if (tmp[1] === tmp[0]) {344 // Outdated Node.js345 t.deepEqual(index.Buffer.alloc(5, 'ok'), index.Buffer.from('ooooo'))346 } else {347 t.deepEqual(index.Buffer.alloc(5, 'ok'), index.Buffer.from('okoko'))348 }349 t.notDeepEqual(index.Buffer.alloc(5, 'ok'), index.Buffer.from('kokok'))350 t.end()351})352test('safer.Buffer.from returns results same as Buffer constructor', function (t) {353 [index, safer, dangerous].forEach(function (impl) {354 t.deepEqual(impl.Buffer.from(''), new buffer.Buffer(''))355 t.deepEqual(impl.Buffer.from('string'), new buffer.Buffer('string'))356 t.deepEqual(impl.Buffer.from('string', 'utf-8'), new buffer.Buffer('string', 'utf-8'))357 t.deepEqual(impl.Buffer.from('b25ldHdvdGhyZWU=', 'base64'), new buffer.Buffer('b25ldHdvdGhyZWU=', 'base64'))358 t.deepEqual(impl.Buffer.from([0, 42, 3]), new buffer.Buffer([0, 42, 3]))359 t.deepEqual(impl.Buffer.from(new Uint8Array([0, 42, 3])), new buffer.Buffer(new Uint8Array([0, 42, 3])))360 t.deepEqual(impl.Buffer.from([]), new buffer.Buffer([]))361 })362 t.end()363})364test('safer.Buffer.from returns consistent results', function (t) {365 [index, safer, dangerous].forEach(function (impl) {366 t.deepEqual(impl.Buffer.from(''), impl.Buffer.alloc(0))367 t.deepEqual(impl.Buffer.from([]), impl.Buffer.alloc(0))368 t.deepEqual(impl.Buffer.from(new Uint8Array([])), impl.Buffer.alloc(0))369 t.deepEqual(impl.Buffer.from('string', 'utf-8'), impl.Buffer.from('string'))370 t.deepEqual(impl.Buffer.from('string'), impl.Buffer.from([115, 116, 114, 105, 110, 103]))371 t.deepEqual(impl.Buffer.from('string'), impl.Buffer.from(impl.Buffer.from('string')))372 t.deepEqual(impl.Buffer.from('b25ldHdvdGhyZWU=', 'base64'), impl.Buffer.from('onetwothree'))373 t.notDeepEqual(impl.Buffer.from('b25ldHdvdGhyZWU='), impl.Buffer.from('onetwothree'))374 })375 t.end()...
Buffer.js
Source:Buffer.js
1/*global define*/2define([3 '../Core/defaultValue',4 '../Core/defined',5 '../Core/defineProperties',6 '../Core/destroyObject',7 '../Core/DeveloperError',8 '../Core/IndexDatatype',9 '../Core/WebGLConstants',10 './BufferUsage'11 ], function(12 defaultValue,13 defined,14 defineProperties,15 destroyObject,16 DeveloperError,17 IndexDatatype,18 WebGLConstants,19 BufferUsage) {20 'use strict';21 /**22 * @private23 */24 function Buffer(options) {25 options = defaultValue(options, defaultValue.EMPTY_OBJECT);26 //>>includeStart('debug', pragmas.debug);27 if (!defined(options.context)) {28 throw new DeveloperError('options.context is required.');29 }30 if (!defined(options.typedArray) && !defined(options.sizeInBytes)) {31 throw new DeveloperError('Either options.sizeInBytes or options.typedArray is required.');32 }33 if (defined(options.typedArray) && defined(options.sizeInBytes)) {34 throw new DeveloperError('Cannot pass in both options.sizeInBytes and options.typedArray.');35 }36 if (defined(options.typedArray) && !(typeof options.typedArray === 'object' && typeof options.typedArray.byteLength === 'number')) {37 throw new DeveloperError('options.typedArray must be a typed array');38 }39 if (!BufferUsage.validate(options.usage)) {40 throw new DeveloperError('usage is invalid.');41 }42 //>>includeEnd('debug');43 var gl = options.context._gl;44 var bufferTarget = options.bufferTarget;45 var typedArray = options.typedArray;46 var sizeInBytes = options.sizeInBytes;47 var usage = options.usage;48 var hasArray = defined(typedArray);49 if (hasArray) {50 sizeInBytes = typedArray.byteLength;51 }52 //>>includeStart('debug', pragmas.debug);53 if (sizeInBytes <= 0) {54 throw new DeveloperError('Buffer size must be greater than zero.');55 }56 //>>includeEnd('debug');57 var buffer = gl.createBuffer();58 gl.bindBuffer(bufferTarget, buffer);59 gl.bufferData(bufferTarget, hasArray ? typedArray : sizeInBytes, usage);60 gl.bindBuffer(bufferTarget, null);61 this._gl = gl;62 this._bufferTarget = bufferTarget;63 this._sizeInBytes = sizeInBytes;64 this._usage = usage;65 this._buffer = buffer;66 this.vertexArrayDestroyable = true;67 }68 /**69 * Creates a vertex buffer, which contains untyped vertex data in GPU-controlled memory.70 * <br /><br />71 * A vertex array defines the actual makeup of a vertex, e.g., positions, normals, texture coordinates,72 * etc., by interpreting the raw data in one or more vertex buffers.73 *74 * @param {Object} options An object containing the following properties:75 * @param {Context} options.context The context in which to create the buffer76 * @param {ArrayBufferView} [options.typedArray] A typed array containing the data to copy to the buffer.77 * @param {Number} [options.sizeInBytes] A <code>Number</code> defining the size of the buffer in bytes. Required if options.typedArray is not given.78 * @param {BufferUsage} options.usage Specifies the expected usage pattern of the buffer. On some GL implementations, this can significantly affect performance. See {@link BufferUsage}.79 * @returns {VertexBuffer} The vertex buffer, ready to be attached to a vertex array.80 *81 * @exception {DeveloperError} Must specify either <options.typedArray> or <options.sizeInBytes>, but not both.82 * @exception {DeveloperError} The buffer size must be greater than zero.83 * @exception {DeveloperError} Invalid <code>usage</code>.84 *85 *86 * @example87 * // Example 1. Create a dynamic vertex buffer 16 bytes in size.88 * var buffer = Buffer.createVertexBuffer({89 * context : context,90 * sizeInBytes : 16,91 * usage : BufferUsage.DYNAMIC_DRAW92 * });93 *94 * @example95 * // Example 2. Create a dynamic vertex buffer from three floating-point values.96 * // The data copied to the vertex buffer is considered raw bytes until it is97 * // interpreted as vertices using a vertex array.98 * var positionBuffer = buffer.createVertexBuffer({99 * context : context,100 * typedArray : new Float32Array([0, 0, 0]),101 * usage : BufferUsage.STATIC_DRAW102 * });103 *104 * @see {@link https://www.khronos.org/opengles/sdk/docs/man/xhtml/glGenBuffer.xml|glGenBuffer}105 * @see {@link https://www.khronos.org/opengles/sdk/docs/man/xhtml/glBindBuffer.xml|glBindBuffer} with <code>ARRAY_BUFFER</code>106 * @see {@link https://www.khronos.org/opengles/sdk/docs/man/xhtml/glBufferData.xml|glBufferData} with <code>ARRAY_BUFFER</code>107 */108 Buffer.createVertexBuffer = function(options) {109 //>>includeStart('debug', pragmas.debug);110 if (!defined(options.context)) {111 throw new DeveloperError('options.context is required.');112 }113 //>>includeEnd('debug');114 return new Buffer({115 context: options.context,116 bufferTarget: WebGLConstants.ARRAY_BUFFER,117 typedArray: options.typedArray,118 sizeInBytes: options.sizeInBytes,119 usage: options.usage120 });121 };122 /**123 * Creates an index buffer, which contains typed indices in GPU-controlled memory.124 * <br /><br />125 * An index buffer can be attached to a vertex array to select vertices for rendering.126 * <code>Context.draw</code> can render using the entire index buffer or a subset127 * of the index buffer defined by an offset and count.128 *129 * @param {Object} options An object containing the following properties:130 * @param {Context} options.context The context in which to create the buffer131 * @param {ArrayBufferView} [options.typedArray] A typed array containing the data to copy to the buffer.132 * @param {Number} [options.sizeInBytes] A <code>Number</code> defining the size of the buffer in bytes. Required if options.typedArray is not given.133 * @param {BufferUsage} options.usage Specifies the expected usage pattern of the buffer. On some GL implementations, this can significantly affect performance. See {@link BufferUsage}.134 * @param {IndexDatatype} options.indexDatatype The datatype of indices in the buffer.135 * @returns {IndexBuffer} The index buffer, ready to be attached to a vertex array.136 *137 * @exception {DeveloperError} Must specify either <options.typedArray> or <options.sizeInBytes>, but not both.138 * @exception {DeveloperError} IndexDatatype.UNSIGNED_INT requires OES_element_index_uint, which is not supported on this system. Check context.elementIndexUint.139 * @exception {DeveloperError} The size in bytes must be greater than zero.140 * @exception {DeveloperError} Invalid <code>usage</code>.141 * @exception {DeveloperError} Invalid <code>indexDatatype</code>.142 *143 *144 * @example145 * // Example 1. Create a stream index buffer of unsigned shorts that is146 * // 16 bytes in size.147 * var buffer = Buffer.createIndexBuffer({148 * context : context,149 * sizeInBytes : 16,150 * usage : BufferUsage.STREAM_DRAW,151 * indexDatatype : IndexDatatype.UNSIGNED_SHORT152 * });153 *154 * @example155 * // Example 2. Create a static index buffer containing three unsigned shorts.156 * var buffer = Buffer.createIndexBuffer({157 * context : context,158 * typedArray : new Uint16Array([0, 1, 2]),159 * usage : BufferUsage.STATIC_DRAW,160 * indexDatatype : IndexDatatype.UNSIGNED_SHORT161 * });162 *163 * @see {@link https://www.khronos.org/opengles/sdk/docs/man/xhtml/glGenBuffer.xml|glGenBuffer}164 * @see {@link https://www.khronos.org/opengles/sdk/docs/man/xhtml/glBindBuffer.xml|glBindBuffer} with <code>ELEMENT_ARRAY_BUFFER</code>165 * @see {@link https://www.khronos.org/opengles/sdk/docs/man/xhtml/glBufferData.xml|glBufferData} with <code>ELEMENT_ARRAY_BUFFER</code>166 */167 Buffer.createIndexBuffer = function(options) {168 //>>includeStart('debug', pragmas.debug);169 if (!defined(options.context)) {170 throw new DeveloperError('options.context is required.');171 }172 if (!IndexDatatype.validate(options.indexDatatype)) {173 throw new DeveloperError('Invalid indexDatatype.');174 }175 if ((options.indexDatatype === IndexDatatype.UNSIGNED_INT) && !options.context.elementIndexUint) {176 throw new DeveloperError('IndexDatatype.UNSIGNED_INT requires OES_element_index_uint, which is not supported on this system. Check context.elementIndexUint.');177 }178 //>>includeEnd('debug');179 var context = options.context;180 var indexDatatype = options.indexDatatype;181 var bytesPerIndex = IndexDatatype.getSizeInBytes(indexDatatype);182 var buffer = new Buffer({183 context : context,184 bufferTarget : WebGLConstants.ELEMENT_ARRAY_BUFFER,185 typedArray : options.typedArray,186 sizeInBytes : options.sizeInBytes,187 usage : options.usage188 });189 var numberOfIndices = buffer.sizeInBytes / bytesPerIndex;190 defineProperties(buffer, {191 indexDatatype: {192 get : function() {193 return indexDatatype;194 }195 },196 bytesPerIndex : {197 get : function() {198 return bytesPerIndex;199 }200 },201 numberOfIndices : {202 get : function() {203 return numberOfIndices;204 }205 }206 });207 return buffer;208 };209 defineProperties(Buffer.prototype, {210 sizeInBytes : {211 get : function() {212 return this._sizeInBytes;213 }214 },215 usage: {216 get : function() {217 return this._usage;218 }219 }220 });221 Buffer.prototype._getBuffer = function() {222 return this._buffer;223 };224 Buffer.prototype.copyFromArrayView = function(arrayView, offsetInBytes) {225 offsetInBytes = defaultValue(offsetInBytes, 0);226 //>>includeStart('debug', pragmas.debug);227 if (!arrayView) {228 throw new DeveloperError('arrayView is required.');229 }230 if (offsetInBytes + arrayView.byteLength > this._sizeInBytes) {231 throw new DeveloperError('This buffer is not large enough.');232 }233 //>>includeEnd('debug');234 var gl = this._gl;235 var target = this._bufferTarget;236 gl.bindBuffer(target, this._buffer);237 gl.bufferSubData(target, offsetInBytes, arrayView);238 gl.bindBuffer(target, null);239 };240 Buffer.prototype.isDestroyed = function() {241 return false;242 };243 Buffer.prototype.destroy = function() {244 this._gl.deleteBuffer(this._buffer);245 return destroyObject(this);246 };247 return Buffer;...
BufferSpec.js
Source:BufferSpec.js
1/*global defineSuite*/2defineSuite([3 'Renderer/Buffer',4 'Core/IndexDatatype',5 'Renderer/BufferUsage',6 'Specs/createContext'7 ], function(8 Buffer,9 IndexDatatype,10 BufferUsage,11 createContext) {12 'use strict';13 var context;14 var buffer;15 beforeAll(function() {16 context = createContext();17 });18 afterAll(function() {19 context.destroyForSpecs();20 });21 afterEach(function() {22 if (buffer) {23 buffer = buffer.destroy();24 }25 });26 it('throws when creating a vertex buffer with no context', function() {27 expect(function() {28 buffer = Buffer.createVertexBuffer({29 sizeInBytes : 4,30 usage : BufferUsage.STATIC_DRAW31 });32 }).toThrowDeveloperError();33 });34 it('throws when creating a vertex buffer with an invalid typed array', function() {35 expect(function() {36 buffer = Buffer.createVertexBuffer({37 context : context,38 typedArray : {},39 usage : BufferUsage.STATIC_DRAW40 });41 }).toThrowDeveloperError();42 });43 it('throws when creating a vertex buffer with both a typed array and size in bytes', function() {44 expect(function() {45 buffer = Buffer.createVertexBuffer({46 context : context,47 typedArray : new Float32Array([0, 0, 0, 1]),48 sizeInBytes : 16,49 usage : BufferUsage.STATIC_DRAW50 });51 }).toThrowDeveloperError();52 });53 it('throws when creating a vertex buffer without a typed array or size in bytes', function() {54 expect(function() {55 buffer = Buffer.createVertexBuffer({56 context : context,57 usage : BufferUsage.STATIC_DRAW58 });59 }).toThrowDeveloperError();60 });61 it('throws when creating a vertex buffer with invalid usage', function() {62 expect(function() {63 buffer = Buffer.createVertexBuffer({64 context : context,65 sizeInBytes : 16,66 usage : 067 });68 }).toThrowDeveloperError();69 });70 it('throws when creating a vertex buffer with size of zero', function() {71 expect(function() {72 buffer = Buffer.createVertexBuffer({73 context : context,74 sizeInBytes : 0,75 usage : BufferUsage.STATIC_DRAW76 });77 }).toThrowDeveloperError();78 });79 it('creates vertex buffer', function() {80 buffer = Buffer.createVertexBuffer({81 context : context,82 sizeInBytes : 16,83 usage : BufferUsage.STATIC_DRAW84 });85 expect(buffer.sizeInBytes).toEqual(16);86 expect(buffer.usage).toEqual(BufferUsage.STATIC_DRAW);87 });88 it('copies array to a vertex buffer', function() {89 var sizeInBytes = 3 * Float32Array.BYTES_PER_ELEMENT;90 var vertices = new ArrayBuffer(sizeInBytes);91 var positions = new Float32Array(vertices);92 positions[0] = 1.0;93 positions[1] = 2.0;94 positions[2] = 3.0;95 buffer = Buffer.createVertexBuffer({96 context : context,97 sizeInBytes : sizeInBytes,98 usage : BufferUsage.STATIC_DRAW99 });100 buffer.copyFromArrayView(vertices);101 });102 it('can create a vertex buffer from a typed array', function() {103 var typedArray = new Float32Array(3 * Float32Array.BYTES_PER_ELEMENT);104 typedArray[0] = 1.0;105 typedArray[1] = 2.0;106 typedArray[2] = 3.0;107 buffer = Buffer.createVertexBuffer({108 context : context,109 typedArray : typedArray,110 usage : BufferUsage.STATIC_DRAW111 });112 expect(buffer.sizeInBytes).toEqual(typedArray.byteLength);113 expect(buffer.usage).toEqual(BufferUsage.STATIC_DRAW);114 });115 it('can create a vertex buffer from a size in bytes', function() {116 buffer = Buffer.createVertexBuffer({117 context : context,118 sizeInBytes : 4,119 usage : BufferUsage.STATIC_DRAW120 });121 expect(buffer.sizeInBytes).toEqual(4);122 expect(buffer.usage).toEqual(BufferUsage.STATIC_DRAW);123 });124 it('throws when creating an index buffer with no context', function() {125 expect(function() {126 buffer = Buffer.createIndexBuffer({127 sizeInBytes : 4,128 usage : BufferUsage.STATIC_DRAW,129 indexDatatype : IndexDatatype.UNSIGNED_SHORT130 });131 }).toThrowDeveloperError();132 });133 it('throws when creating an index buffer with an invalid typed array', function() {134 expect(function() {135 buffer = Buffer.createIndexBuffer({136 context : context,137 typedArray : {},138 usage : BufferUsage.STATIC_DRAW,139 indexDatatype : IndexDatatype.UNSIGNED_SHORT140 });141 }).toThrowDeveloperError();142 });143 it('throws when creating an index buffer with both a typed array and size in bytes', function() {144 expect(function() {145 buffer = Buffer.createIndexBuffer({146 context : context,147 typedArray : new Uint16Array([0, 1, 2, 0, 2, 3]),148 sizeInBytes : 12,149 usage : BufferUsage.STATIC_DRAW,150 indexDatatype : IndexDatatype.UNSIGNED_SHORT151 });152 }).toThrowDeveloperError();153 });154 it('throws when creating an index buffer without a typed array or size in bytes', function() {155 expect(function() {156 buffer = Buffer.createIndexBuffer({157 context : context,158 usage : BufferUsage.STATIC_DRAW,159 indexDatatype : IndexDatatype.UNSIGNED_SHORT160 });161 }).toThrowDeveloperError();162 });163 it('throws when creating an index buffer with invalid usage', function() {164 expect(function() {165 buffer = Buffer.createIndexBuffer({166 context : context,167 sizeInBytes : 16,168 usage : "invalid",169 indexDatatype : IndexDatatype.UNSIGNED_SHORT170 });171 }).toThrowDeveloperError();172 });173 it('throws when creating an index buffer with invalid index data type', function() {174 expect(function() {175 buffer = Buffer.createIndexBuffer({176 context : context,177 sizeInBytes : 16,178 usage : BufferUsage.STATIC_DRAW,179 indexDatatype : 'invalid'180 });181 }).toThrowDeveloperError();182 });183 it('throws when creating an index buffer with size of zero', function() {184 expect(function() {185 buffer = Buffer.createIndexBuffer({186 context : context,187 sizeInBytes : 0,188 usage : BufferUsage.STATIC_DRAW,189 indexDatatype : IndexDatatype.UNSIGNED_SHORT190 });191 }).toThrowDeveloperError();192 });193 it('creates index buffer', function() {194 buffer = Buffer.createIndexBuffer({195 context : context,196 sizeInBytes : 6,197 usage : BufferUsage.STREAM_DRAW,198 indexDatatype : IndexDatatype.UNSIGNED_SHORT199 });200 expect(buffer.sizeInBytes).toEqual(6);201 expect(buffer.usage).toEqual(BufferUsage.STREAM_DRAW);202 expect(buffer.indexDatatype).toEqual(IndexDatatype.UNSIGNED_SHORT);203 expect(buffer.bytesPerIndex).toEqual(2);204 expect(buffer.numberOfIndices).toEqual(3);205 });206 it('copies array to an index buffer', function() {207 var sizeInBytes = 3 * Uint16Array.BYTES_PER_ELEMENT;208 var elements = new ArrayBuffer(sizeInBytes);209 var indices = new Uint16Array(elements);210 indices[0] = 1;211 indices[1] = 2;212 indices[2] = 3;213 buffer = Buffer.createIndexBuffer({214 context : context,215 sizeInBytes : sizeInBytes,216 usage : BufferUsage.STATIC_DRAW,217 indexDatatype : IndexDatatype.UNSIGNED_SHORT218 });219 buffer.copyFromArrayView(elements);220 });221 it('can create an index buffer from a typed array', function() {222 var typedArray = new Uint16Array(3 * Uint16Array.BYTES_PER_ELEMENT);223 typedArray[0] = 1;224 typedArray[1] = 2;225 typedArray[2] = 3;226 buffer = Buffer.createIndexBuffer({227 context : context,228 typedArray : typedArray,229 usage : BufferUsage.STATIC_DRAW,230 indexDatatype : IndexDatatype.UNSIGNED_SHORT231 });232 expect(buffer.sizeInBytes).toEqual(typedArray.byteLength);233 expect(buffer.usage).toEqual(BufferUsage.STATIC_DRAW);234 expect(buffer.indexDatatype).toEqual(IndexDatatype.UNSIGNED_SHORT);235 });236 it('can create an index buffer from a size in bytes', function() {237 buffer = Buffer.createIndexBuffer({238 context : context,239 sizeInBytes : 6,240 usage : BufferUsage.STATIC_DRAW,241 indexDatatype : IndexDatatype.UNSIGNED_SHORT242 });243 expect(buffer.sizeInBytes).toEqual(6);244 expect(buffer.usage).toEqual(BufferUsage.STATIC_DRAW);245 expect(buffer.indexDatatype).toEqual(IndexDatatype.UNSIGNED_SHORT);246 });247 it('destroys', function() {248 var b = Buffer.createIndexBuffer({249 context : context,250 sizeInBytes : 3,251 usage : BufferUsage.STATIC_DRAW,252 indexDatatype : IndexDatatype.UNSIGNED_BYTE253 });254 expect(b.isDestroyed()).toEqual(false);255 b.destroy();256 expect(b.isDestroyed()).toEqual(true);257 });258 it('fails to provide an array view', function() {259 buffer = Buffer.createVertexBuffer({260 context : context,261 sizeInBytes : 3,262 usage : BufferUsage.STATIC_DRAW263 });264 expect(function() {265 buffer.copyFromArrayView();266 }).toThrowDeveloperError();267 });268 it('fails to copy a large array view', function() {269 buffer = Buffer.createVertexBuffer({270 context : context,271 sizeInBytes : 3,272 usage : BufferUsage.STATIC_DRAW273 });274 var elements = new ArrayBuffer(3);275 expect(function() {276 buffer.copyFromArrayView(elements, 1);277 }).toThrowDeveloperError();278 });279 it('fails to destroy', function() {280 var b = Buffer.createIndexBuffer({281 context : context,282 sizeInBytes : 3,283 usage : BufferUsage.STATIC_DRAW,284 indexDatatype : IndexDatatype.UNSIGNED_BYTE285 });286 b.destroy();287 expect(function() {288 b.destroy();289 }).toThrowDeveloperError();290 });...
webgl-demo.js
Source:webgl-demo.js
1var canvas;2var gl;34var mvMatrix;5var shaderProgram;6var vertexPositionAttribute;7var vertexColorAttribute;8var textureCoordAttribute;9var perspectiveMatrix;10var _totalIndices;1112var baseTime = false;13var mode = 0;1415var nBuffers = 3;16var buffers = [];17var bufLength = 2;18var tunnelTexture;19var tfrom = -1, tto = -1;2021function trajectory(t)22{23 var q = t/200*Math.PI*2;24 var mul = 1.5;25 q /= mul;2627 var x = Math.cos(q)*4;28 var y = Math.sin(q)*4+Math.cos(q*2)*2;29 var z = Math.cos(q*3)*5;30 var r = Math.cos(q*2)*0.2+0.5;31 return {v:$V([x*mul, y*mul, z*mul]), r:r};32}3334function dvec(v) { return !v? "NULL" : (v.e(1).toFixed(2) + " " + v.e(2).toFixed(2) + " " + v.e(3).toFixed(2));}3536function buildWormhole(detail, y0, y1, func)37{38 var data = [];39 if ( typeof(globCircle) == "undefined" || globCircle.length != detail )40 {41 console.log("Calculating circle");42 globCircle = new Array(detail);43 for ( var x=0; x<detail; x++)44 globCircle[x] = [Math.cos(x/detail*2*Math.PI), Math.sin(x/detail*2*Math.PI)];45 }4647 var prev = func(y0);48 for (var y=y0; y<y1; y++)49 {50 var center = prev; //func(y);51 var newCenter = func(y+1);52 prev = newCenter;5354 var vect = newCenter.v.subtract(center.v);5556 vect1 = center.v.cross(newCenter.v).toUnitVector();57 vect2 = vect.cross(vect1).toUnitVector();5859 data[y-y0] = [];60 for (var x=0; x<detail; x++)61 {62 var _cos = globCircle[x][0]*center.r;63 var _sin = globCircle[x][1]*center.r;64 var pt = $V([65 vect1.e(1)*_cos + vect2.e(1)*_sin,66 vect1.e(2)*_cos + vect2.e(2)*_sin,67 vect1.e(3)*_cos + vect2.e(3)*_sin68 ]);69 data[y-y0][x] = center.v.add(pt);//{x: center.x + pt.e(1), y: center.y + pt.e(2), z: center.z + pt.e(3)};70 }71 }72 return data;73}7475function createBuffer(_from, _to) 76{77 var w = 8, h = _to - _from;7879 var wormhole = buildWormhole(w, _from, _to, trajectory);8081 var vertices = new Array(h*w*3);82 var colors = new Array(h*w*4);83 var indices = new Array((h-1)*w*6);84 var coords = new Array(h*w*2);8586 var vertexi = 0, colori = 0, indexi = 0, coordi = 0;8788 for (var y=0; y<h; y++)89 for (var x=0; x<w; x++) 90 {91 var vertex = wormhole[y][x];92 vertices[vertexi++] = vertex.e(1);93 vertices[vertexi++] = vertex.e(2);94 vertices[vertexi++] = vertex.e(3);9596 var color = [0.8 + Math.random(), 0.8 + Math.random(), 0.8 + Math.random(), 1];97 if ( x == 0 ) color = [0, 1, 0, 1];98 if ( x == Math.floor(w/2) ) color = [0, 0, 1, 1];99100 colors[colori++] = color[0];101 colors[colori++] = color[1];102 colors[colori++] = color[2];103 colors[colori++] = color[3];104105 coords[coordi++] = x/w;106 coords[coordi++] = y/8;107 }108109 for ( var y=0; y<h-1; y++)110 {111 var base0 = y*w;112 var base1 = y*w+w;113 for ( var x=0; x<w; x++)114 {115 indices[indexi++] = base0 + x;116 indices[indexi++] = base0 + (x+1)%w;117 indices[indexi++] = base1 + x;118119 indices[indexi++] = base1 + x;120 indices[indexi++] = base0 + (x+1)%w;121 indices[indexi++] = base1 + (x+1)%w;122 }123 }124125 var cubeVerticesBuffer = gl.createBuffer();126 gl.bindBuffer(gl.ARRAY_BUFFER, cubeVerticesBuffer);127 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(vertices), gl.STATIC_DRAW);128129 var cubeVerticesColorBuffer = gl.createBuffer();130 gl.bindBuffer(gl.ARRAY_BUFFER, cubeVerticesColorBuffer);131 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(colors), gl.STATIC_DRAW);132133 var cubeVerticesIndexBuffer = gl.createBuffer();134 gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, cubeVerticesIndexBuffer);135 gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array(indices), gl.STATIC_DRAW);136137 var cubeVertexTextureCoordBuffer = gl.createBuffer();138 gl.bindBuffer(gl.ARRAY_BUFFER, cubeVertexTextureCoordBuffer);139 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(coords), gl.STATIC_DRAW);140141 return {142 vertexBuffer:cubeVerticesBuffer, 143 colorBuffer:cubeVerticesColorBuffer, 144 indexBuffer:cubeVerticesIndexBuffer, 145 coordBuffer:cubeVertexTextureCoordBuffer,146 indices:indices.length,147 range:{from:_from, to:_to}148 };149}150151function buildVbo(data)152{153 var result = {};154 if ( data.vertexBuffer )155 {156 result.vertexBuffer = gl.createBuffer();157 gl.bindBuffer(gl.ARRAY_BUFFER, result.vertexBuffer);158 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(data.vertexBuffer), gl.STATIC_DRAW);159 }160161 if ( data.colorBuffer )162 {163 result.colorBuffer = gl.createBuffer();164 gl.bindBuffer(gl.ARRAY_BUFFER, result.colorBuffer);165 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(data.colorBuffer), gl.STATIC_DRAW);166 }167168 if ( data.indexBuffer )169 {170 result.indices = data.indexBuffer.length;171 result.indexBuffer = gl.createBuffer();172 gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, result.indexBuffer);173 gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array(data.indexBuffer), gl.STATIC_DRAW);174 }175176 if ( data.coordBuffer )177 {178 result.coordBuffer = gl.createBuffer();179 gl.bindBuffer(gl.ARRAY_BUFFER, result.coordBuffer);180 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(data.coordBuffer), gl.STATIC_DRAW);181 }182 return result;183}184185function drawBuffer(buf)186{187 if ( !buf || !buf.vertexBuffer )188 return;189190 gl.bindBuffer(gl.ARRAY_BUFFER, buf.vertexBuffer);191 gl.vertexAttribPointer(vertexPositionAttribute, 3, gl.FLOAT, false, 0, 0);192193 gl.bindBuffer(gl.ARRAY_BUFFER, buf.colorBuffer);194 gl.vertexAttribPointer(vertexColorAttribute, 4, gl.FLOAT, false, 0, 0);195196 gl.bindBuffer(gl.ARRAY_BUFFER, buf.coordBuffer);197 gl.vertexAttribPointer(textureCoordAttribute, 2, gl.FLOAT, false, 0, 0);198 199 gl.activeTexture(gl.TEXTURE0);200 gl.bindTexture(gl.TEXTURE_2D, tunnelTexture);201 gl.uniform1i(shaderProgram.samplerUniform, 0);202 203 gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, buf.indexBuffer);204 setMatrixUniforms();205206 gl.drawElements(gl.TRIANGLES, buf.indices, gl.UNSIGNED_SHORT, 0);207}208209function handleTextureLoad(image, texture)210{211 gl.bindTexture(gl.TEXTURE_2D, texture);212 gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image);213 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);214 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_NEAREST);215 gl.generateMipmap(gl.TEXTURE_2D);216 gl.bindTexture(gl.TEXTURE_2D, null);217}218219function isInRange(buf, t)220{221 if ( !buf || !buf.range )222 return false;223 return ( t <= buf.range.to );224}225226function traceForward(base, dist)227{228 // todo: optimize!229 var len = 0, t = 0;230 var cur = trajectory(base);231 do {232 t += 0.1;233 var next = trajectory(base+t);234 var curdist = cur.v.distanceFrom(next.v);235 len += curdist;236 cur = next;237 } while (len < dist);238 return cur;239}240241function drawScene() 242{ 243 var currentTime = (new Date).getTime();244 if ( !baseTime )245 {246 baseTime = currentTime;247248 tunnelTexture = gl.createTexture();249 tunnelTexture.image = new Image();250 tunnelTexture.image.onload = function() { handleTextureLoad(tunnelTexture.image, tunnelTexture); }251 tunnelTexture.image.src = "texture.jpg"; // NOTE: chrome, firefox won't load local textures!252253 gl.uniform1f(shaderProgram.enableFog, 1*1.0);254255 vboBall = createBall(0.05);256 vboBigBall = createBall(1);257 vboPlane = createPlane();258 }259 currentTime -= baseTime;260261262 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);263 perspectiveMatrix = makePerspective(45, 960.0/540.0, 0.1, 100.0);264 loadIdentity();265266// gl.enable(gl.SCISSOR_TEST);267268 // generate VBOs269 var speed = 1/250/2;270 var t = currentTime*speed;271 var len = bufLength * 8;272273 while ( buffers.length < nBuffers )274 {275 var last = (buffers.length == 0) ? Math.floor(t) : buffers[buffers.length-1].range.to-1;276 buffers[buffers.length] = createBuffer(last, last+len+1);277 }278279 while ( buffers.length > 0 && buffers[0].range.to < t )280 buffers.shift();281282283 var pt0 = trajectory(t);284 var pt1 = traceForward(t, 1);285 var pt2 = traceForward(t, 2);286 var maxup = (pt1.v.subtract(pt0.v).subtract(pt2.v.subtract(pt1.v))).toUnitVector().multiply(-1); 287 var up = pt0.v.cross(pt2.v).toUnitVector();288 289 var forw = pt1.v.subtract(pt2.v).toUnitVector();290 var stra1 = forw.cross(up).multiply(+0.05);291 var stra2 = forw.cross(up).multiply(-0.05);292293 mvPushMatrix();294 multMatrix(makeLookAt(295 pt0.v.e(1), pt0.v.e(2), pt0.v.e(3), 296 pt1.v.e(1), pt1.v.e(2), pt1.v.e(3),297 up.e(1), up.e(2), up.e(3)));298299 mvTranslate([stra1.e(1), stra1.e(2), stra1.e(3)]);300 301302// gl.scissor(0,0,960/2,540);303 gl.viewport(0,0,960,540/2);304305 for ( buf in buffers )306 drawBuffer(buffers[buf]);307308 mvTranslate([-stra1.e(1), -stra1.e(2), -stra1.e(3)]);309 mvTranslate([stra2.e(1), stra2.e(2), stra2.e(3)]);310311// gl.scissor(960/2,0,960/2,540);312 gl.viewport(0,540/2,960,540/2);313314 for ( buf in buffers )315 drawBuffer(buffers[buf]);316317}318319document.onkeypress=function(e){320 var e=window.event || e321 if ( ++mode >= 3 ) mode = 0;322 gl.uniform1f(shaderProgram.enableFog, mode == 2 ? 0 : 1);
...
classtlx_1_1RingBuffer.js
Source:classtlx_1_1RingBuffer.js
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test-buffer-bytelength.js
Source:test-buffer-bytelength.js
1'use strict';2var Buffer = require('../../').Buffer;3var assert = require('assert');4var Buffer = require('../../').Buffer;5var SlowBuffer = require('../../').SlowBuffer;6// coerce values to string7assert.equal(Buffer.byteLength(32, 'latin1'), 2);8assert.equal(Buffer.byteLength(NaN, 'utf8'), 3);9assert.equal(Buffer.byteLength({}, 'latin1'), 15);10assert.equal(Buffer.byteLength(), 9);11var buff = new Buffer(10);12assert(ArrayBuffer.isView(buff));13var slowbuff = new SlowBuffer(10);14assert(ArrayBuffer.isView(slowbuff));15// buffer16var incomplete = Buffer.from([0xe4, 0xb8, 0xad, 0xe6, 0x96]);17assert.equal(Buffer.byteLength(incomplete), 5);18var ascii = Buffer.from('abc');19assert.equal(Buffer.byteLength(ascii), 3);20// ArrayBuffer21var buffer = new ArrayBuffer(8);22assert.equal(Buffer.byteLength(buffer), 8);23// TypedArray24var int8 = new Int8Array(8);25assert.equal(Buffer.byteLength(int8), 8);26var uint8 = new Uint8Array(8);27assert.equal(Buffer.byteLength(uint8), 8);28var uintc8 = new Uint8ClampedArray(2);29assert.equal(Buffer.byteLength(uintc8), 2);30var int16 = new Int16Array(8);31assert.equal(Buffer.byteLength(int16), 16);32var uint16 = new Uint16Array(8);33assert.equal(Buffer.byteLength(uint16), 16);34var int32 = new Int32Array(8);35assert.equal(Buffer.byteLength(int32), 32);36var uint32 = new Uint32Array(8);37assert.equal(Buffer.byteLength(uint32), 32);38var float32 = new Float32Array(8);39assert.equal(Buffer.byteLength(float32), 32);40var float64 = new Float64Array(8);41assert.equal(Buffer.byteLength(float64), 64);42// DataView43var dv = new DataView(new ArrayBuffer(2));44assert.equal(Buffer.byteLength(dv), 2);45// special case: zero length string46assert.equal(Buffer.byteLength('', 'ascii'), 0);47assert.equal(Buffer.byteLength('', 'HeX'), 0);48// utf849assert.equal(Buffer.byteLength('âéllö wørlâ!', 'utf-8'), 19);50assert.equal(Buffer.byteLength('κλμνξο', 'utf8'), 12);51assert.equal(Buffer.byteLength('æµæ¶æ·æ¸æ¹', 'utf-8'), 15);52assert.equal(Buffer.byteLength('ð ¹ð ±ð ±¸', 'UTF8'), 12);53// without an encoding, utf8 should be assumed54assert.equal(Buffer.byteLength('hey there'), 9);55assert.equal(Buffer.byteLength('𠱸æ¶Î½Î¾#xx :)'), 17);56assert.equal(Buffer.byteLength('hello world', ''), 11);57// it should also be assumed with unrecognized encoding58assert.equal(Buffer.byteLength('hello world', 'abc'), 11);59assert.equal(Buffer.byteLength('ÃÅââ', 'unkn0wn enc0ding'), 10);60// base6461assert.equal(Buffer.byteLength('aGVsbG8gd29ybGQ=', 'base64'), 11);62assert.equal(Buffer.byteLength('bm9kZS5qcyByb2NrcyE=', 'base64'), 14);63assert.equal(Buffer.byteLength('aGkk', 'base64'), 3);64assert.equal(Buffer.byteLength('bHNrZGZsa3NqZmtsc2xrZmFqc2RsZmtqcw==',65 'base64'), 25);66// special padding67assert.equal(Buffer.byteLength('aaa=', 'base64'), 2);68assert.equal(Buffer.byteLength('aaaa==', 'base64'), 3);69assert.equal(Buffer.byteLength('Il était tué'), 14);70assert.equal(Buffer.byteLength('Il était tué', 'utf8'), 14);71assert.equal(Buffer.byteLength('Il était tué', 'ascii'), 12);72assert.equal(Buffer.byteLength('Il était tué', 'latin1'), 12);73assert.equal(Buffer.byteLength('Il était tué', 'binary'), 12);74['ucs2', 'ucs-2', 'utf16le', 'utf-16le'].forEach(function(encoding) {75 assert.equal(24, Buffer.byteLength('Il était tué', encoding));...
buffer-util.js
Source:buffer-util.js
1'use strict';2const { EMPTY_BUFFER } = require('./constants');3/**4 * Merges an array of buffers into a new buffer.5 *6 * @param {Buffer[]} list The array of buffers to concat7 * @param {Number} totalLength The total length of buffers in the list8 * @return {Buffer} The resulting buffer9 * @public10 */11function concat(list, totalLength) {12 if (list.length === 0) return EMPTY_BUFFER;13 if (list.length === 1) return list[0];14 const target = Buffer.allocUnsafe(totalLength);15 var offset = 0;16 for (var i = 0; i < list.length; i++) {17 const buf = list[i];18 buf.copy(target, offset);19 offset += buf.length;20 }21 return target;22}23/**24 * Masks a buffer using the given mask.25 *26 * @param {Buffer} source The buffer to mask27 * @param {Buffer} mask The mask to use28 * @param {Buffer} output The buffer where to store the result29 * @param {Number} offset The offset at which to start writing30 * @param {Number} length The number of bytes to mask.31 * @public32 */33function _mask(source, mask, output, offset, length) {34 for (var i = 0; i < length; i++) {35 output[offset + i] = source[i] ^ mask[i & 3];36 }37}38/**39 * Unmasks a buffer using the given mask.40 *41 * @param {Buffer} buffer The buffer to unmask42 * @param {Buffer} mask The mask to use43 * @public44 */45function _unmask(buffer, mask) {46 // Required until https://github.com/nodejs/node/issues/9006 is resolved.47 const length = buffer.length;48 for (var i = 0; i < length; i++) {49 buffer[i] ^= mask[i & 3];50 }51}52/**53 * Converts a buffer to an `ArrayBuffer`.54 *55 * @param {Buffer} buf The buffer to convert56 * @return {ArrayBuffer} Converted buffer57 * @public58 */59function toArrayBuffer(buf) {60 if (buf.byteLength === buf.buffer.byteLength) {61 return buf.buffer;62 }63 return buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.byteLength);64}65/**66 * Converts `data` to a `Buffer`.67 *68 * @param {*} data The data to convert69 * @return {Buffer} The buffer70 * @throws {TypeError}71 * @public72 */73function toBuffer(data) {74 toBuffer.readOnly = true;75 if (Buffer.isBuffer(data)) return data;76 var buf;77 if (data instanceof ArrayBuffer) {78 buf = Buffer.from(data);79 } else if (ArrayBuffer.isView(data)) {80 buf = viewToBuffer(data);81 } else {82 buf = Buffer.from(data);83 toBuffer.readOnly = false;84 }85 return buf;86}87/**88 * Converts an `ArrayBuffer` view into a buffer.89 *90 * @param {(DataView|TypedArray)} view The view to convert91 * @return {Buffer} Converted view92 * @private93 */94function viewToBuffer(view) {95 const buf = Buffer.from(view.buffer);96 if (view.byteLength !== view.buffer.byteLength) {97 return buf.slice(view.byteOffset, view.byteOffset + view.byteLength);98 }99 return buf;100}101try {102 const bufferUtil = require('bufferutil');103 const bu = bufferUtil.BufferUtil || bufferUtil;104 module.exports = {105 concat,106 mask(source, mask, output, offset, length) {107 if (length < 48) _mask(source, mask, output, offset, length);108 else bu.mask(source, mask, output, offset, length);109 },110 toArrayBuffer,111 toBuffer,112 unmask(buffer, mask) {113 if (buffer.length < 32) _unmask(buffer, mask);114 else bu.unmask(buffer, mask);115 }116 };117} catch (e) /* istanbul ignore next */ {118 module.exports = {119 concat,120 mask: _mask,121 toArrayBuffer,122 toBuffer,123 unmask: _unmask124 };...
Using AI Code Generation
1const puppeteer = require('puppeteer');2(async () => {3 const browser = await puppeteer.launch();4 const page = await browser.newPage();5 await page.screenshot({path: 'example.png'});6 await browser.close();7})();8const puppeteer = require('puppeteer');9(async () => {10 const browser = await puppeteer.launch();11 const page = await browser.newPage();12 const screenshot = await page.screenshot();13 console.log(screenshot);14 await browser.close();15})();16const puppeteer = require('puppeteer');17(async () => {18 const browser = await puppeteer.launch();19 const page = await browser.newPage();20 const screenshot = await page.screenshot();21 console.log(screenshot.toString('base64'));22 await browser.close();23})();24const puppeteer = require('puppeteer');25(async () => {26 const browser = await puppeteer.launch();27 const page = await browser.newPage();28 const screenshot = await page.screenshot();29 console.log(screenshot.toString('base64'));30 await browser.close();31})();32const puppeteer = require('puppeteer');33(async () => {34 const browser = await puppeteer.launch();35 const page = await browser.newPage();36 const screenshot = await page.screenshot();37 console.log(screenshot.toString('base64'));38 await browser.close();39})();40const puppeteer = require('puppeteer');41(async () => {42 const browser = await puppeteer.launch();43 const page = await browser.newPage();44 const screenshot = await page.screenshot();45 console.log(screenshot.toString('base64'));46 await browser.close();47})();
Using AI Code Generation
1const puppeteer = require('puppeteer');2(async () => {3 const browser = await puppeteer.launch();4 const page = await browser.newPage();5 await page.screenshot({path: 'example.png'});6 await browser.close();7})();8const puppeteer = require('puppeteer');9(async () => {10 const browser = await puppeteer.launch();11 const page = await browser.newPage();12 const screenshot = await page.screenshot({path: 'example.png'});13 await browser.close();14})();15const puppeteer = require('puppeteer');16(async () => {17 const browser = await puppeteer.launch();18 const page = await browser.newPage();19 const screenshot = await page.screenshot({path: 'example.png'});20 await browser.close();21 return screenshot;22})();23const puppeteer = require('puppeteer');24(async () => {25 const browser = await puppeteer.launch();26 const page = await browser.newPage();27 const screenshot = await page.screenshot({path: 'example.png'});28 await browser.close();29 return screenshot;30})();31const puppeteer = require('puppeteer');32(async () => {33 const browser = await puppeteer.launch();34 const page = await browser.newPage();35 const screenshot = await page.screenshot({path: 'example.png'});36 await browser.close();37 return screenshot;38})();39const puppeteer = require('puppeteer');40(async () => {41 const browser = await puppeteer.launch();42 const page = await browser.newPage();43 const screenshot = await page.screenshot({path: 'example.png'});44 await browser.close();45 return screenshot;46})();47const puppeteer = require('
Using AI Code Generation
1const puppeteer = require('puppeteer');2const fs = require('fs');3(async () => {4 const browser = await puppeteer.launch();5 const page = await browser.newPage();6 await page.screenshot({path: 'example.png'});7 const screenshot = await page.screenshot();8 await fs.writeFileSync('example2.png', screenshot);9 await browser.close();10})();11const puppeteer = require('puppeteer');12(async () => {13 const browser = await puppeteer.launch();14 const page = await browser.newPage();15 await page.screenshot({path: 'example.png'});16 const screenshot = await page.screenshot({encoding: 'base64'});17 await console.log(screenshot);18 await browser.close();19})();20const puppeteer = require('puppeteer');21(async () => {22 const browser = await puppeteer.launch();23 const page = await browser.newPage();24 await page.screenshot({path: 'example.png'});25 const screenshot = await page.screenshot({type: 'jpeg', encoding: 'base64'});26 await console.log(screenshot);27 await browser.close();28})();29const puppeteer = require('puppeteer');30(async () => {31 const browser = await puppeteer.launch();32 const page = await browser.newPage();33 await page.screenshot({path: 'example.png'});34 const screenshot = await page.screenshot({type: 'jpeg', fullPage: true, encoding: 'base64'});35 await console.log(screenshot);36 await browser.close();37})();38const puppeteer = require('puppeteer');39(async () => {40 const browser = await puppeteer.launch();41 const page = await browser.newPage();42 await page.screenshot({path: 'example.png'});43 const screenshot = await page.screenshot({type: 'jpeg', fullPage: true, encoding
Using AI Code Generation
1const puppeteer = require('puppeteer');2(async () => {3 const browser = await puppeteer.launch();4 const page = await browser.newPage();5 await page.screenshot({path: 'example.png'});6 await browser.close();7})();8const puppeteer = require('puppeteer');9(async () => {10 const browser = await puppeteer.launch();11 const page = await browser.newPage();12 await page.screenshot({path: 'example.png'});13 await browser.close();14})();15const puppeteer = require('puppeteer');16(async () => {17 const browser = await puppeteer.launch();18 const page = await browser.newPage();19 await page.screenshot({path: 'example.png'});20 await browser.close();21})();22const puppeteer = require('puppeteer');23(async () => {24 const browser = await puppeteer.launch();25 const page = await browser.newPage();26 await page.screenshot({path: 'example.png'});27 await browser.close();28})();29const puppeteer = require('puppeteer');30(async () => {31 const browser = await puppeteer.launch();32 const page = await browser.newPage();33 await page.screenshot({path: 'example.png'});34 await browser.close();35})();36const puppeteer = require('puppeteer');37(async () => {38 const browser = await puppeteer.launch();39 const page = await browser.newPage();40 await page.screenshot({path: 'example.png'});41 await browser.close();42})();43const puppeteer = require('puppeteer');44(async () => {45 const browser = await puppeteer.launch();46 const page = await browser.newPage();
Using AI Code Generation
1const puppeteer = require('puppeteer');2const fs = require('fs');3(async () => {4 const browser = await puppeteer.launch();5 const page = await browser.newPage();6 const buffer = await page.screenshot({fullPage: true});7 fs.writeFileSync('example.png', buffer);8 await browser.close();9})();10const puppeteer = require('puppeteer');11const fs = require('fs');12(async () => {13 const browser = await puppeteer.launch();14 const page = await browser.newPage();15 const base64 = await page.screenshot({fullPage: true, encoding: 'base64'});16 fs.writeFileSync('example.png', base64, {encoding: 'base64'});17 await browser.close();18})();19const puppeteer = require('puppeteer');20const fs = require('fs');21(async () => {22 const browser = await puppeteer.launch();23 const page = await browser.newPage();24 const buffer = await page.screenshot({fullPage: true, encoding: 'jpeg'});25 fs.writeFileSync('example.jpg', buffer);26 await browser.close();27})();28const puppeteer = require('puppeteer');29const fs = require('fs');30(async () => {31 const browser = await puppeteer.launch();32 const page = await browser.newPage();33 const buffer = await page.screenshot({fullPage: true, encoding: 'jpeg', quality: 50});34 fs.writeFileSync('example.jpg', buffer);35 await browser.close();36})();37const puppeteer = require('puppeteer');38const fs = require('fs');39(async () => {40 const browser = await puppeteer.launch();41 const page = await browser.newPage();42 const buffer = await page.screenshot({fullPage: true, encoding: 'jpeg', quality: 50});43 fs.writeFileSync('example.jpg', buffer);44 await browser.close();45})();
Using AI Code Generation
1const puppeteer = require('puppeteer');2(async () => {3 const browser = await puppeteer.launch();4 const page = await browser.newPage();5 await page.screenshot({path: 'google.png'});6 await browser.close();7})();8const puppeteer = require('puppeteer');9(async () => {10 const browser = await puppeteer.launch();11 const page = await browser.newPage();12 await page.screenshot({path: 'google.png'});13 await browser.close();14})();15const puppeteer = require('puppeteer');16(async () => {17 const browser = await puppeteer.launch();18 const page = await browser.newPage();19 await page.screenshot({path: 'google.png'});20 await browser.close();21})();22const puppeteer = require('puppeteer');23(async () => {24 const browser = await puppeteer.launch();25 const page = await browser.newPage();26 await page.screenshot({path: 'google.png'});27 await browser.close();28})();29const puppeteer = require('puppeteer');30(async () => {31 const browser = await puppeteer.launch();32 const page = await browser.newPage();33 await page.screenshot({path: 'google.png'});34 await browser.close();35})();36const puppeteer = require('puppeteer');37(async () => {38 const browser = await puppeteer.launch();39 const page = await browser.newPage();40 await page.screenshot({path: 'google.png'});41 await browser.close();42})();43const puppeteer = require('puppeteer');44(async () => {45 const browser = await puppeteer.launch();
Using AI Code Generation
1const puppeteer = require('puppeteer');2(async () => {3 const browser = await puppeteer.launch();4 const page = await browser.newPage();5 const buffer = await page.screenshot({ fullPage: true });6 await browser.close();7 console.log(buffer);8})();9const puppeteer = require('puppeteer');10(async () => {11 const browser = await puppeteer.launch();12 const page = await browser.newPage();13 const base64 = await page.screenshot({ fullPage: true, encoding: 'base64' });14 await browser.close();15 console.log(base64);16})();17const puppeteer = require('puppeteer');18(async () => {19 const browser = await puppeteer.launch();20 const page = await browser.newPage();21 const jpeg = await page.screenshot({ fullPage: true, encoding: 'jpeg' });22 await browser.close();23 console.log(jpeg);24})();25const puppeteer = require('puppeteer');26(async () => {27 const browser = await puppeteer.launch();28 const page = await browser.newPage();29 const buffer = await page.screenshot({ fullPage: true });30 await browser.close();31 console.log(buffer);32})();33const puppeteer = require('puppeteer');34(async () => {35 const browser = await puppeteer.launch();36 const page = await browser.newPage();37 const base64 = await page.screenshot({ fullPage: true, encoding: 'base64' });38 await browser.close();39 console.log(base64);40})();41const puppeteer = require('puppeteer');42(async () => {43 const browser = await puppeteer.launch();44 const page = await browser.newPage();45 const jpeg = await page.screenshot({ fullPage: true, encoding: 'jpeg' });46 await browser.close();47 console.log(jpeg);48})();
Using AI Code Generation
1const puppeteer = require('puppeteer');2(async () => {3 const browser = await puppeteer.launch();4 const page = await browser.newPage();5 const pdf = await page.pdf({6 margin: {7 },8 });9 await browser.close();10 return pdf;11})();12const express = require('express');13const app = express();14const port = 3000;15const test = require('./test');16app.get('/', (req, res) => res.send('Hello World!'));17app.get('/pdf', (req, res) => {18 test().then((pdf) => {19 res.set({20 });21 res.send(pdf);22 });23});24app.listen(port, () => console.log(`Example app listening on port ${port}!`));25{26 "scripts": {27 },28 "dependencies": {29 }30}
Using AI Code Generation
1const puppeteer = require('puppeteer');2const devices = require('puppeteer/DeviceDescriptors');3const iPhone = devices['iPhone 6'];4const fs = require('fs');5const path = require('path');6const util = require('util');7const mkdir = util.promisify(fs.mkdir);8const writeFile = util.promisify(fs.writeFile);9(async () => {10 const browser = await puppeteer.launch();11 const page = await browser.newPage();12 await page.emulate(iPhone);13 await page.screenshot({path: 'example.png'});14 await page.pdf({path: 'hn.pdf', format: 'A4'});15 const buffer = await page.screenshot({ fullPage: true });16 await mkdir(path.join(__dirname, 'screenshots'), { recursive: true });17 await writeFile(path.join(__dirname, 'screenshots', 'google.png'), buffer);18 await browser.close();19})();
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