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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

1var classtlx_1_1RingBuffer =2[3    [ "alloc_traits", "classtlx_1_1RingBuffer.html#afa4e55910e087a8c2393c8e09eb78b4f", null ],4    [ "allocator_type", "classtlx_1_1RingBuffer.html#a1b9340a5b56dce81fa182aee8c64e363", null ],5    [ "const_pointer", "classtlx_1_1RingBuffer.html#a942671c3bf981a9c6aed99563af3ae3f", null ],6    [ "const_reference", "classtlx_1_1RingBuffer.html#a19b0fa325e3dfdd4d732bb52c8f20e93", null ],7    [ "difference_type", "classtlx_1_1RingBuffer.html#a4db1526a7432629938f1aba3203accaa", null ],8    [ "pointer", "classtlx_1_1RingBuffer.html#a1eb349cbe5db02193774b9026a90df1c", null ],9    [ "reference", "classtlx_1_1RingBuffer.html#a3386b4404c6a6b493b35ff08e1b57217", null ],10    [ "size_type", "classtlx_1_1RingBuffer.html#adc178afcc34fc9f6a71f60f1c305084d", null ],11    [ "value_type", "classtlx_1_1RingBuffer.html#af0f70ef64d23e2379bacb63968e68b45", null ],12    [ "RingBuffer", "classtlx_1_1RingBuffer.html#ad76f5f87b217dab7b48ea7dff1871900", null ],13    [ "RingBuffer", "classtlx_1_1RingBuffer.html#a9e3a80a04841d98f044cf2cb67c04d0f", null ],14    [ "RingBuffer", "classtlx_1_1RingBuffer.html#aba418f11115fef12dd9f6a7ce017614a", null ],15    [ "RingBuffer", "classtlx_1_1RingBuffer.html#a3737f2f41c869f2c49b56f11ebf33f1e", null ],16    [ "~RingBuffer", "classtlx_1_1RingBuffer.html#a0fff6182d30d785358c6a3ef7db0931f", null ],17    [ "allocate", "classtlx_1_1RingBuffer.html#a3bb82abc6851598063f31094a69bac5e", null ],18    [ "back", "classtlx_1_1RingBuffer.html#a9870425783540b4ca3fe8052772fcaa8", null ],19    [ "back", "classtlx_1_1RingBuffer.html#afc77f0e3f44c6712f6bf4aa5f452a99f", null ],20    [ "capacity", "classtlx_1_1RingBuffer.html#a260442ef344f843c480ff1f6aefd6db3", null ],21    [ "clear", "classtlx_1_1RingBuffer.html#ac8bb3912a3ce86b15842e79d0b421204", null ],22    [ "copy_to", "classtlx_1_1RingBuffer.html#a4712b32d7697035eb2dfd864bfbaeab6", null ],23    [ "deallocate", "classtlx_1_1RingBuffer.html#a2d68be4fd20ffdd7f7a9b51579eacc2f", null ],24    [ "emplace_back", "classtlx_1_1RingBuffer.html#ac294eba73765b9a72a7399d64e8ecd9a", null ],25    [ "emplace_front", "classtlx_1_1RingBuffer.html#a7587ef607434c3fe91f80c45d5c0d8da", null ],26    [ "empty", "classtlx_1_1RingBuffer.html#a3f6fc5de06a318920d84f3c3742db07f", null ],27    [ "front", "classtlx_1_1RingBuffer.html#aa688f5c7b1552245701b0d16d6b95ec6", null ],28    [ "front", "classtlx_1_1RingBuffer.html#af6ce9aca34b12f7e9794186afdbd8025", null ],29    [ "load", "classtlx_1_1RingBuffer.html#a27f4b372d3515f81ee63062814c2bbe9", null ],30    [ "max_size", "classtlx_1_1RingBuffer.html#aa77c5677e96e956feccbd5a7abbf8fe2", null ],31    [ "move_to", "classtlx_1_1RingBuffer.html#ac4eb8f7058fc153a56de3da92a8f4817", null ],32    [ "operator=", "classtlx_1_1RingBuffer.html#a07e35b4118f1356c1b2745d60273fcfe", null ],33    [ "operator=", "classtlx_1_1RingBuffer.html#a0176d9303b082e74cc33cc7c8bfd1e2f", null ],34    [ "operator[]", "classtlx_1_1RingBuffer.html#aab6af54d683011c8da699fd13cf22b56", null ],35    [ "operator[]", "classtlx_1_1RingBuffer.html#a7d4e17439baa2cdfd0be4cca86577251", null ],36    [ "pop_back", "classtlx_1_1RingBuffer.html#a058bda4957df6a97b1ea6c9fd783f672", null ],37    [ "pop_front", "classtlx_1_1RingBuffer.html#a56f4ffbc6fd414b3c02a6c368e99594f", null ],38    [ "push_back", "classtlx_1_1RingBuffer.html#a6fc9f02cb6de7b518120ccd2bce5302a", null ],39    [ "push_back", "classtlx_1_1RingBuffer.html#a8671f30ba2b80ddb4b309dfa13f0600d", null ],40    [ "push_front", "classtlx_1_1RingBuffer.html#a7b05c0ba4868fafcd6306cb22602ee87", null ],41    [ "push_front", "classtlx_1_1RingBuffer.html#a0ad98831bee02df314496ffab4500536", null ],42    [ "save", "classtlx_1_1RingBuffer.html#ad719b5a03421363e973983b4e088ecb3", null ],43    [ "size", "classtlx_1_1RingBuffer.html#a0801762a3fe36fe32dca5f16e515478d", null ],44    [ "alloc_", "classtlx_1_1RingBuffer.html#af8ef2a35aadec4f191c273973f1304a6", null ],45    [ "begin_", "classtlx_1_1RingBuffer.html#a6f51da5125ced58697d7f8b51640bf74", null ],46    [ "capacity_", "classtlx_1_1RingBuffer.html#aa3099a4c2b0b3ab5ba4188b4a8f59b26", null ],47    [ "data_", "classtlx_1_1RingBuffer.html#a98e4560adae148e80c54e8f07b59685f", null ],48    [ "end_", "classtlx_1_1RingBuffer.html#a70f45a20b6aebf0123d92011c045ad50", null ],49    [ "mask_", "classtlx_1_1RingBuffer.html#a7b17e9608c37b08dc3312f2ce0611f59", null ],50    [ "max_size_", "classtlx_1_1RingBuffer.html#a6c71cd8b63dbd5e33c81719592b68977", null ]...

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('âÃ©llÃ¶ wÃ¸rlâ!', 'utf-8'), 19);50assert.equal(Buffer.byteLength('ÎºÎ»Î¼Î½Î¾Î¿', '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('ð ±¸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 Ã©tait tuÃ©'), 14);70assert.equal(Buffer.byteLength('Il Ã©tait tuÃ©', 'utf8'), 14);71assert.equal(Buffer.byteLength('Il Ã©tait tuÃ©', 'ascii'), 12);72assert.equal(Buffer.byteLength('Il Ã©tait tuÃ©', 'latin1'), 12);73assert.equal(Buffer.byteLength('Il Ã©tait tuÃ©', 'binary'), 12);74['ucs2', 'ucs-2', 'utf16le', 'utf-16le'].forEach(function(encoding) {75  assert.equal(24, Buffer.byteLength('Il Ã©tait tuÃ©', 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})();

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.