How to use CanvasGraphics method in wpt

Best JavaScript code snippet using wpt

canvasgraphics.js

Source:canvasgraphics.js

1// Copyright 2007 The Closure Library Authors. All Rights Reserved.2//3// Licensed under the Apache License, Version 2.0 (the "License");4// you may not use this file except in compliance with the License.5// You may obtain a copy of the License at6//7//      http://www.apache.org/licenses/LICENSE-2.08//9// Unless required by applicable law or agreed to in writing, software10// distributed under the License is distributed on an "AS-IS" BASIS,11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.12// See the License for the specific language governing permissions and13// limitations under the License.14/**15 * @fileoverview CanvasGraphics sub class that uses the canvas tag for drawing.16 * @author robbyw@google.com (Robby Walker)17 */18goog.provide('goog.graphics.CanvasGraphics');19goog.require('goog.dom.TagName');20goog.require('goog.events.EventType');21goog.require('goog.graphics.AbstractGraphics');22goog.require('goog.graphics.CanvasEllipseElement');23goog.require('goog.graphics.CanvasGroupElement');24goog.require('goog.graphics.CanvasImageElement');25goog.require('goog.graphics.CanvasPathElement');26goog.require('goog.graphics.CanvasRectElement');27goog.require('goog.graphics.CanvasTextElement');28goog.require('goog.graphics.SolidFill');29goog.require('goog.math.Size');30goog.require('goog.style');31/**32 * A Graphics implementation for drawing using canvas.33 * @param {string|number} width The (non-zero) width in pixels.  Strings34 *     expressing percentages of parent with (e.g. '80%') are also accepted.35 * @param {string|number} height The (non-zero) height in pixels.  Strings36 *     expressing percentages of parent with (e.g. '80%') are also accepted.37 * @param {?number=} opt_coordWidth The coordinate width - if38 *     omitted or null, defaults to same as width.39 * @param {?number=} opt_coordHeight The coordinate height - if40 *     omitted or null, defaults to same as height.41 * @param {goog.dom.DomHelper=} opt_domHelper The DOM helper object for the42 *     document we want to render in.43 * @constructor44 * @extends {goog.graphics.AbstractGraphics}45 * @deprecated goog.graphics is deprecated. It existed to abstract over browser46 *     differences before the canvas tag was widely supported.  See47 *     http://en.wikipedia.org/wiki/Canvas_element for details.48 */49goog.graphics.CanvasGraphics = function(50    width, height, opt_coordWidth, opt_coordHeight, opt_domHelper) {51  goog.graphics.AbstractGraphics.call(52      this, width, height, opt_coordWidth, opt_coordHeight, opt_domHelper);53};54goog.inherits(goog.graphics.CanvasGraphics, goog.graphics.AbstractGraphics);55/**56 * Sets the fill for the given element.57 * @param {goog.graphics.StrokeAndFillElement} element The element58 *     wrapper.59 * @param {goog.graphics.Fill} fill The fill object.60 * @override61 */62goog.graphics.CanvasGraphics.prototype.setElementFill = function(63    element, fill) {64  this.redraw();65};66/**67 * Sets the stroke for the given element.68 * @param {goog.graphics.StrokeAndFillElement} element The element69 *     wrapper.70 * @param {goog.graphics.Stroke} stroke The stroke object.71 * @override72 */73goog.graphics.CanvasGraphics.prototype.setElementStroke = function(74    element, stroke) {75  this.redraw();76};77/**78 * Set the translation and rotation of an element.79 *80 * If a more general affine transform is needed than this provides81 * (e.g. skew and scale) then use setElementAffineTransform.82 * @param {goog.graphics.Element} element The element wrapper.83 * @param {number} x The x coordinate of the translation transform.84 * @param {number} y The y coordinate of the translation transform.85 * @param {number} angle The angle of the rotation transform.86 * @param {number} centerX The horizontal center of the rotation transform.87 * @param {number} centerY The vertical center of the rotation transform.88 * @override89 */90goog.graphics.CanvasGraphics.prototype.setElementTransform = function(91    element, x, y, angle, centerX, centerY) {92  this.redraw();93};94/**95 * Set the transformation of an element.96 *97 * Note that in this implementation this method just calls this.redraw()98 * and the affineTransform param is unused.99 * @param {!goog.graphics.Element} element The element wrapper.100 * @param {!goog.graphics.AffineTransform} affineTransform The101 *     transformation applied to this element.102 * @override103 */104goog.graphics.CanvasGraphics.prototype.setElementAffineTransform = function(105    element, affineTransform) {106  this.redraw();107};108/**109 * Push an element transform on to the transform stack.110 * @param {goog.graphics.Element} element The transformed element.111 */112goog.graphics.CanvasGraphics.prototype.pushElementTransform = function(113    element) {114  var ctx = this.getContext();115  ctx.save();116  var transform = element.getTransform();117  // TODO(robbyw): Test for unsupported transforms i.e. skews.118  var tx = transform.getTranslateX();119  var ty = transform.getTranslateY();120  if (tx || ty) {121    ctx.translate(tx, ty);122  }123  var sinTheta = transform.getShearY();124  if (sinTheta) {125    ctx.rotate(Math.asin(sinTheta));126  }127};128/**129 * Pop an element transform off of the transform stack.130 */131goog.graphics.CanvasGraphics.prototype.popElementTransform = function() {132  this.getContext().restore();133};134/**135 * Creates the DOM representation of the graphics area.136 * @override137 */138goog.graphics.CanvasGraphics.prototype.createDom = function() {139  var element = this.dom_.createDom(140      goog.dom.TagName.DIV, {'style': 'position:relative;overflow:hidden'});141  this.setElementInternal(element);142  this.canvas_ = this.dom_.createDom(goog.dom.TagName.CANVAS);143  element.appendChild(this.canvas_);144  /**145   * The main canvas element.146   * @type {goog.graphics.CanvasGroupElement}147   */148  this.canvasElement = new goog.graphics.CanvasGroupElement(this);149  this.lastGroup_ = this.canvasElement;150  this.redrawTimeout_ = 0;151  this.updateSize();152};153/**154 * Clears the drawing context object in response to actions that make the old155 * context invalid - namely resize of the canvas element.156 * @private157 */158goog.graphics.CanvasGraphics.prototype.clearContext_ = function() {159  this.context_ = null;160};161/**162 * Returns the drawing context.163 * @return {Object} The canvas element rendering context.164 */165goog.graphics.CanvasGraphics.prototype.getContext = function() {166  if (!this.getElement()) {167    this.createDom();168  }169  if (!this.context_) {170    this.context_ = this.canvas_.getContext('2d');171    this.context_.save();172  }173  return this.context_;174};175/**176 * Changes the coordinate system position.177 * @param {number} left The coordinate system left bound.178 * @param {number} top The coordinate system top bound.179 * @override180 */181goog.graphics.CanvasGraphics.prototype.setCoordOrigin = function(left, top) {182  this.coordLeft = left;183  this.coordTop = top;184  this.redraw();185};186/**187 * Changes the coordinate size.188 * @param {number} coordWidth The coordinate width.189 * @param {number} coordHeight The coordinate height.190 * @override191 */192goog.graphics.CanvasGraphics.prototype.setCoordSize = function(193    coordWidth, coordHeight) {194  goog.graphics.CanvasGraphics.superClass_.setCoordSize.apply(this, arguments);195  this.redraw();196};197/**198 * Change the size of the canvas.199 * @param {number} pixelWidth The width in pixels.200 * @param {number} pixelHeight The height in pixels.201 * @override202 */203goog.graphics.CanvasGraphics.prototype.setSize = function(204    pixelWidth, pixelHeight) {205  this.width = pixelWidth;206  this.height = pixelHeight;207  this.updateSize();208  this.redraw();209};210/** @override */211goog.graphics.CanvasGraphics.prototype.getPixelSize = function() {212  // goog.style.getSize does not work for Canvas elements.  We213  // have to compute the size manually if it is percentage based.214  var width = this.width;215  var height = this.height;216  var computeWidth = goog.isString(width) && width.indexOf('%') != -1;217  var computeHeight = goog.isString(height) && height.indexOf('%') != -1;218  if (!this.isInDocument() && (computeWidth || computeHeight)) {219    return null;220  }221  var parent;222  var parentSize;223  if (computeWidth) {224    parent = /** @type {Element} */ (this.getElement().parentNode);225    parentSize = goog.style.getSize(parent);226    width = parseFloat(/** @type {string} */ (width)) * parentSize.width / 100;227  }228  if (computeHeight) {229    parent = parent || /** @type {Element} */ (this.getElement().parentNode);230    parentSize = parentSize || goog.style.getSize(parent);231    height =232        parseFloat(/** @type {string} */ (height)) * parentSize.height / 100;233  }234  return new goog.math.Size(235      /** @type {number} */ (width),236      /** @type {number} */ (height));237};238/**239 * Update the size of the canvas.240 */241goog.graphics.CanvasGraphics.prototype.updateSize = function() {242  goog.style.setSize(this.getElement(), this.width, this.height);243  var pixels = this.getPixelSize();244  if (pixels) {245    goog.style.setSize(246        this.canvas_,247        /** @type {number} */ (pixels.width),248        /** @type {number} */ (pixels.height));249    this.canvas_.width = pixels.width;250    this.canvas_.height = pixels.height;251    this.clearContext_();252  }253};254/**255 * Reset the canvas.256 */257goog.graphics.CanvasGraphics.prototype.reset = function() {258  var ctx = this.getContext();259  ctx.restore();260  var size = this.getPixelSize();261  if (size.width && size.height) {262    ctx.clearRect(0, 0, size.width, size.height);263  }264  ctx.save();265};266/**267 * Remove all drawing elements from the graphics.268 * @override269 */270goog.graphics.CanvasGraphics.prototype.clear = function() {271  this.reset();272  this.canvasElement.clear();273  var el = this.getElement();274  // Remove all children (text nodes) except the canvas (which is at index 0)275  while (el.childNodes.length > 1) {276    el.removeChild(el.lastChild);277  }278};279/**280 * Redraw the entire canvas.281 */282goog.graphics.CanvasGraphics.prototype.redraw = function() {283  if (this.preventRedraw_) {284    this.needsRedraw_ = true;285    return;286  }287  if (this.isInDocument()) {288    this.reset();289    if (this.coordWidth) {290      var pixels = this.getPixelSize();291      this.getContext().scale(292          pixels.width / this.coordWidth, pixels.height / this.coordHeight);293    }294    if (this.coordLeft || this.coordTop) {295      this.getContext().translate(-this.coordLeft, -this.coordTop);296    }297    this.pushElementTransform(this.canvasElement);298    this.canvasElement.draw(this.context_);299    this.popElementTransform();300  }301};302/**303 * Draw an element, including any stroke or fill.304 * @param {goog.graphics.Element} element The element to draw.305 */306goog.graphics.CanvasGraphics.prototype.drawElement = function(element) {307  if (element instanceof goog.graphics.CanvasTextElement) {308    // Don't draw text since that is not implemented using canvas.309    return;310  }311  var ctx = this.getContext();312  this.pushElementTransform(element);313  if (!element.getFill || !element.getStroke) {314    // Draw without stroke or fill (e.g. the element is an image or group).315    element.draw(ctx);316    this.popElementTransform();317    return;318  }319  var fill = element.getFill();320  if (fill) {321    if (fill instanceof goog.graphics.SolidFill) {322      if (fill.getOpacity() != 0) {323        ctx.globalAlpha = fill.getOpacity();324        ctx.fillStyle = fill.getColor();325        element.draw(ctx);326        ctx.fill();327        ctx.globalAlpha = 1;328      }329    } else {  // (fill instanceof goog.graphics.LinearGradient)330      var linearGradient = ctx.createLinearGradient(331          fill.getX1(), fill.getY1(), fill.getX2(), fill.getY2());332      linearGradient.addColorStop(0.0, fill.getColor1());333      linearGradient.addColorStop(1.0, fill.getColor2());334      ctx.fillStyle = linearGradient;335      element.draw(ctx);336      ctx.fill();337    }338  }339  var stroke = element.getStroke();340  if (stroke) {341    element.draw(ctx);342    ctx.strokeStyle = stroke.getColor();343    var width = stroke.getWidth();344    if (goog.isString(width) && width.indexOf('px') != -1) {345      width = parseFloat(width) / this.getPixelScaleX();346    }347    ctx.lineWidth = width;348    ctx.stroke();349  }350  this.popElementTransform();351};352/**353 * Append an element.354 *355 * @param {goog.graphics.Element} element The element to draw.356 * @param {goog.graphics.GroupElement|undefined} group The group to draw357 *     it in. If null or undefined, defaults to the root group.358 * @protected359 */360goog.graphics.CanvasGraphics.prototype.append = function(element, group) {361  group = group || this.canvasElement;362  group.appendChild(element);363  if (this.isDrawable(group)) {364    this.drawElement(element);365  }366};367/**368 * Draw an ellipse.369 *370 * @param {number} cx Center X coordinate.371 * @param {number} cy Center Y coordinate.372 * @param {number} rx Radius length for the x-axis.373 * @param {number} ry Radius length for the y-axis.374 * @param {goog.graphics.Stroke} stroke Stroke object describing the375 *    stroke.376 * @param {goog.graphics.Fill} fill Fill object describing the fill.377 * @param {goog.graphics.GroupElement=} opt_group The group wrapper378 *     element to append to.  If not specified, appends to the main canvas.379 *380 * @return {!goog.graphics.EllipseElement} The newly created element.381 * @override382 */383goog.graphics.CanvasGraphics.prototype.drawEllipse = function(384    cx, cy, rx, ry, stroke, fill, opt_group) {385  var element = new goog.graphics.CanvasEllipseElement(386      null, this, cx, cy, rx, ry, stroke, fill);387  this.append(element, opt_group);388  return element;389};390/**391 * Draw a rectangle.392 *393 * @param {number} x X coordinate (left).394 * @param {number} y Y coordinate (top).395 * @param {number} width Width of rectangle.396 * @param {number} height Height of rectangle.397 * @param {goog.graphics.Stroke} stroke Stroke object describing the398 *    stroke.399 * @param {goog.graphics.Fill} fill Fill object describing the fill.400 * @param {goog.graphics.GroupElement=} opt_group The group wrapper401 *     element to append to. If not specified, appends to the main canvas.402 *403 * @return {!goog.graphics.RectElement} The newly created element.404 * @override405 */406goog.graphics.CanvasGraphics.prototype.drawRect = function(407    x, y, width, height, stroke, fill, opt_group) {408  var element = new goog.graphics.CanvasRectElement(409      null, this, x, y, width, height, stroke, fill);410  this.append(element, opt_group);411  return element;412};413/**414 * Draw an image.415 *416 * @param {number} x X coordinate (left).417 * @param {number} y Y coordinate (top).418 * @param {number} width Width of image.419 * @param {number} height Height of image.420 * @param {string} src Source of the image.421 * @param {goog.graphics.GroupElement=} opt_group The group wrapper422 *     element to append to. If not specified, appends to the main canvas.423 *424 * @return {!goog.graphics.ImageElement} The newly created element.425 */426goog.graphics.CanvasGraphics.prototype.drawImage = function(427    x, y, width, height, src, opt_group) {428  var element = new goog.graphics.CanvasImageElement(429      null, this, x, y, width, height, src);430  this.append(element, opt_group);431  return element;432};433/**434 * Draw a text string vertically centered on a given line.435 *436 * @param {string} text The text to draw.437 * @param {number} x1 X coordinate of start of line.438 * @param {number} y1 Y coordinate of start of line.439 * @param {number} x2 X coordinate of end of line.440 * @param {number} y2 Y coordinate of end of line.441 * @param {?string} align Horizontal alignment: left (default), center, right.442 * @param {goog.graphics.Font} font Font describing the font properties.443 * @param {goog.graphics.Stroke} stroke Stroke object describing the stroke.444 * @param {goog.graphics.Fill} fill Fill object describing the fill.445 * @param {goog.graphics.GroupElement=} opt_group The group wrapper446 *     element to append to. If not specified, appends to the main canvas.447 *448 * @return {!goog.graphics.TextElement} The newly created element.449 * @override450 */451goog.graphics.CanvasGraphics.prototype.drawTextOnLine = function(452    text, x1, y1, x2, y2, align, font, stroke, fill, opt_group) {453  var element = new goog.graphics.CanvasTextElement(454      this, text, x1, y1, x2, y2, align,455      /** @type {!goog.graphics.Font} */ (font), stroke, fill);456  this.append(element, opt_group);457  return element;458};459/**460 * Draw a path.461 * @param {!goog.graphics.Path} path The path object to draw.462 * @param {goog.graphics.Stroke} stroke Stroke object describing the stroke.463 * @param {goog.graphics.Fill} fill Fill object describing the fill.464 * @param {goog.graphics.GroupElement=} opt_group The group wrapper465 *     element to append to. If not specified, appends to the main canvas.466 *467 * @return {!goog.graphics.PathElement} The newly created element.468 * @override469 */470goog.graphics.CanvasGraphics.prototype.drawPath = function(471    path, stroke, fill, opt_group) {472  var element =473      new goog.graphics.CanvasPathElement(null, this, path, stroke, fill);474  this.append(element, opt_group);475  return element;476};477/**478 * @param {goog.graphics.GroupElement} group The group to possibly479 *     draw to.480 * @return {boolean} Whether drawing can occur now.481 */482goog.graphics.CanvasGraphics.prototype.isDrawable = function(group) {483  return this.isInDocument() && !this.redrawTimeout_ &&484      !this.isRedrawRequired(group);485};486/**487 * Returns true if drawing to the given group means a redraw is required.488 * @param {goog.graphics.GroupElement} group The group to draw to.489 * @return {boolean} Whether drawing to this group should force a redraw.490 */491goog.graphics.CanvasGraphics.prototype.isRedrawRequired = function(group) {492  // TODO(robbyw): Moving up to any parent of lastGroup should not force redraw.493  return group != this.canvasElement && group != this.lastGroup_;494};495/**496 * Create an empty group of drawing elements.497 *498 * @param {goog.graphics.GroupElement=} opt_group The group wrapper499 *     element to append to. If not specified, appends to the main canvas.500 *501 * @return {!goog.graphics.CanvasGroupElement} The newly created group.502 * @override503 */504goog.graphics.CanvasGraphics.prototype.createGroup = function(opt_group) {505  var group = new goog.graphics.CanvasGroupElement(this);506  opt_group = opt_group || this.canvasElement;507  // TODO(robbyw): Moving up to any parent group should not force redraw.508  if (opt_group == this.canvasElement || opt_group == this.lastGroup_) {509    this.lastGroup_ = group;510  }511  this.append(group, opt_group);512  return group;513};514/**515 * Measure and return the width (in pixels) of a given text string.516 * Text measurement is needed to make sure a text can fit in the allocated517 * area. The way text length is measured is by writing it into a div that is518 * after the visible area, measure the div width, and immediately erase the519 * written value.520 *521 * @param {string} text The text string to measure.522 * @param {goog.graphics.Font} font The font object describing the font style.523 * @override524 */525goog.graphics.CanvasGraphics.prototype.getTextWidth = goog.abstractMethod;526/**527 * Disposes of the component by removing event handlers, detacing DOM nodes from528 * the document body, and removing references to them.529 * @override530 * @protected531 */532goog.graphics.CanvasGraphics.prototype.disposeInternal = function() {533  this.context_ = null;534  goog.graphics.CanvasGraphics.superClass_.disposeInternal.call(this);535};536/** @override */537goog.graphics.CanvasGraphics.prototype.enterDocument = function() {538  var oldPixelSize = this.getPixelSize();539  goog.graphics.CanvasGraphics.superClass_.enterDocument.call(this);540  if (!oldPixelSize) {541    this.updateSize();542    this.dispatchEvent(goog.events.EventType.RESIZE);543  }544  this.redraw();545};546/**547 * Start preventing redraws - useful for chaining large numbers of changes548 * together.  Not guaranteed to do anything - i.e. only use this for549 * optimization of a single code path.550 * @override551 */552goog.graphics.CanvasGraphics.prototype.suspend = function() {553  this.preventRedraw_ = true;554};555/**556 * Stop preventing redraws.  If any redraws had been prevented, a redraw will557 * be done now.558 * @override559 */560goog.graphics.CanvasGraphics.prototype.resume = function() {561  this.preventRedraw_ = false;562  if (this.needsRedraw_) {563    this.redraw();564    this.needsRedraw_ = false;565  }566};567/**568 * Removes an element from the Canvas.569 * @param {goog.graphics.Element} elem the element to remove.570 * @override571 */572goog.graphics.CanvasGraphics.prototype.removeElement = function(elem) {573  if (!elem) {574    return;575  }576  this.canvasElement.removeElement(elem);577  this.redraw();...

Using AI Code Generation

1var CanvasGraphics = require('canvas').CanvasGraphics;2var Canvas = require('canvas').Canvas;3var Image = require('canvas').Image;4var CanvasGradient = require('canvas').CanvasGradient;5var CanvasPattern = require('canvas').CanvasPattern;6var CanvasRenderingContext2D = require('canvas').CanvasRenderingContext2D;7var ImageData = require('canvas').ImageData;8var PDFDocument = require('pdfkit');9var fs = require('fs');10var doc = new PDFDocument;11var canvas = new Canvas(400, 300);12var ctx = canvas.getContext('2d');13doc.pipe(fs.createWriteStream('output.pdf'));14doc.font('fonts/Helvetica.ttf')15   .fontSize(25)16   .text('Here is some vector graphics...', 100, 80);17ctx.translate(100, 150);18ctx.scale(0.6, 0.5);19ctx.rotate(-Math.PI / 12);20ctx.beginPath();21ctx.moveTo(110, 75);22ctx.moveTo(65, 65);23ctx.moveTo(95, 65);24ctx.stroke();25var canvasGraphics = new CanvasGraphics(ctx);26canvasGraphics.embedFonts = true;27var pdf = canvasGraphics.getSvgAsPdf(doc, 400, 300);28doc.addPage({29    margins: {30    }31});32doc.image(pdf, 0, 0, {width: 400, height: 300});33doc.end();

Using AI Code Generation

1var CanvasGraphics = require('canvas');2var fs = require('fs');3var canvas = new CanvasGraphics(200, 200);4var ctx = canvas.getContext('2d');5ctx.fillStyle = 'rgb(200, 0, 0)';6ctx.fillRect(10, 10, 55, 50);7var out = fs.createWriteStream(__dirname + '/image.png');8var stream = canvas.createPNGStream();9stream.on('data', function(chunk){10  out.write(chunk);11});12stream.on('end', function(){13  console.log('saved png');14});

Using AI Code Generation

1var canvas = document.createElement('canvas');2var ctx = canvas.getContext('2d');3var wpt = new CanvasGraphics(ctx);4wpt.moveTo(0, 0);5wpt.lineTo(100, 100);6wpt.stroke();7wpt.close();8var canvas = document.createElement('canvas');9var ctx = canvas.getContext('2d');10var pdfjs = new CanvasGraphics(ctx);11pdfjs.moveTo(0, 0);12pdfjs.lineTo(100, 100);13pdfjs.stroke();14pdfjs.close();15var canvas = document.createElement('canvas');16var ctx = canvas.getContext('2d');17var pdfjsDist = new CanvasGraphics(ctx);18pdfjsDist.moveTo(0, 0);19pdfjsDist.lineTo(100, 100);20pdfjsDist.stroke();21pdfjsDist.close();22var canvas = document.createElement('canvas');23var ctx = canvas.getContext('2d');24var pdfjsDist = new CanvasGraphics(ctx);25pdfjsDist.moveTo(0, 0);26pdfjsDist.lineTo(100, 100);27pdfjsDist.stroke();28pdfjsDist.close();29var canvas = document.createElement('canvas');30var ctx = canvas.getContext('2d');31var pdfjsDist = new CanvasGraphics(ctx);32pdfjsDist.moveTo(0, 0);33pdfjsDist.lineTo(100, 100);34pdfjsDist.stroke();35pdfjsDist.close();36var canvas = document.createElement('canvas');37var ctx = canvas.getContext('2d');38var pdfjsDist = new CanvasGraphics(ctx);39pdfjsDist.moveTo(0, 0);40pdfjsDist.lineTo(100, 100);41pdfjsDist.stroke();42pdfjsDist.close();43var canvas = document.createElement('canvas');44var ctx = canvas.getContext('2d');45var pdfjsDist = new CanvasGraphics(ctx);46pdfjsDist.moveTo(0, 0);47pdfjsDist.lineTo(100, 100);48pdfjsDist.stroke();49pdfjsDist.close();50var canvas = document.createElement('canvas');51var ctx = canvas.getContext('2d');52var pdfjsDist = new CanvasGraphics(ctx

Using AI Code Generation

1var canvas = document.getElementById("canvas");2var ctx = canvas.getContext("2d");3ctx.fillStyle = "#FF0000";4ctx.fillRect(0,0,150,75);5var canvas = document.getElementById("canvas");6var ctx = canvas.getContext("2d");7ctx.beginPath();8ctx.arc(95,50,40,0,2*Math.PI);9ctx.stroke();10var canvas = document.getElementById("canvas");11var ctx = canvas.getContext("2d");12ctx.beginPath();13ctx.moveTo(75,50);14ctx.lineTo(100,75);15ctx.lineTo(100,25);16ctx.fill();17var canvas = document.getElementById("canvas");18var ctx = canvas.getContext("2d");19ctx.moveTo(0,0);20ctx.lineTo(200,100);21ctx.stroke();22var canvas = document.getElementById("canvas");23var ctx = canvas.getContext("2d");24ctx.font = "30px Arial";25ctx.strokeText("Hello World",10,50);26var canvas = document.getElementById("canvas");27var ctx = canvas.getContext("2d");28var img = document.getElementById("scream");29ctx.drawImage(img,10,10);30var canvas = document.getElementById("canvas");31var ctx = canvas.getContext("2d");32var img = document.getElementById("scream");33ctx.drawImage(img,10,10,240,180);34var canvas = document.getElementById("canvas");35var ctx = canvas.getContext("2d");36var img = document.getElementById("scream");37ctx.drawImage(img,10,10,240,180,0,0,240,180);38var canvas = document.getElementById("canvas");39var ctx = canvas.getContext("2d");40var img = document.getElementById("scream");41ctx.drawImage(img,10,10,240,180,0,0,240,180);42var canvas = document.getElementById("canvas

Using AI Code Generation

1var canvas = document.getElementById('canvas');2var ctx = canvas.getContext('2d');3ctx.fillStyle = '#000';4ctx.fillRect(0, 0, 100, 100);5var canvas = document.getElementById('canvas');6var ctx = canvas.getContext('2d');7ctx.fillStyle = '#000';8ctx.fillRect(0, 0, 100, 100);9var canvas = document.getElementById('canvas');10var ctx = canvas.getContext('2d');11ctx.fillStyle = '#000';12ctx.fillRect(0, 0, 100, 100);13var canvas = document.getElementById('canvas');14var ctx = canvas.getContext('2d');15ctx.fillStyle = '#000';16ctx.fillRect(0, 0, 100, 100);17var canvas = document.getElementById('canvas');18var ctx = canvas.getContext('2d');19ctx.fillStyle = '#000';20ctx.fillRect(0, 0, 100, 100);21var canvas = document.getElementById('canvas');22var ctx = canvas.getContext('2d');23ctx.fillStyle = '#000';24ctx.fillRect(0, 0, 100, 100);25var canvas = document.getElementById('canvas');26var ctx = canvas.getContext('2d');27ctx.fillStyle = '#000';28ctx.fillRect(0, 0, 100, 100);29var canvas = document.getElementById('canvas');30var ctx = canvas.getContext('2d');31ctx.fillStyle = '#000';32ctx.fillRect(0, 0, 100, 100);33var canvas = document.getElementById('canvas');34var ctx = canvas.getContext('2d');35ctx.fillStyle = '#000';36ctx.fillRect(0, 0, 100, 100);

Using AI Code Generation

1var Canvas = require('canvas-prebuilt');2var wptools = require('wptools');3var fs = require('fs');4var canvas = new Canvas(600, 600);5var ctx = canvas.getContext('2d');6var options = {7};8var canvasGraphics = new wptools.CanvasGraphics(options);9  pdf.getPage(1).then(function(page) {10    var viewport = page.getViewport(1.5);11    page.render({12    }).then(function() {13      canvas.createPNGStream().pipe(fs.createWriteStream('monalisa.png'));14    });15  });16});17var wptools = require('wptools');18var options = {19};20var svgGraphics = new wptools.SVGGraphics(options);21  pdf.getPage(1).then(function(page) {22    var viewport = page.getViewport(1.5);23    page.render({24    }).then(function() {25      console.log(svgGraphics.getSvg());26    });27  });28});29var Canvas = require('canvas-prebuilt');30var wptools = require('wptools');31var fs = require('fs');32var canvas = new Canvas(600, 600);33var ctx = canvas.getContext('2d');34var options = {

Using AI Code Generation

1var canvas = document.getElementById("canvas");2var ctx = canvas.getContext("2d");3var text = "Hello World";4var font = "30px Arial";5var x = 10;6var y = 50;7var fill = true;8var stroke = false;9var textWidth = CanvasGraphics.measureText(text, font);10CanvasGraphics.fillText(ctx, text, font, x, y, fill, stroke);11CanvasGraphics.strokeText(ctx, text, font, x, y, fill, stroke);12CanvasGraphics.fillText(ctx, text, font, x, y, fill, stroke);13CanvasGraphics.strokeText(ctx, text, font, x, y, fill, stroke);14var CanvasGraphics = (function CanvasGraphicsClosure() {15    function CanvasGraphics(ctx, commonObjs, objs) {16        this.ctx = ctx;17        this.pendingClip = null;18        this.pendingEOFill = false;19        this.res = null;20        this.current = null;21        this.current = new CanvasExtraState();22        this.commonObjs = commonObjs;23        this.objs = objs;24    }25    CanvasGraphics.prototype = {26        beginDrawing: function CanvasGraphics_beginDrawing() {27            this.ctx.save();28        },29        endDrawing: function CanvasGraphics_endDrawing() {30            this.ctx.restore();31            var current = this.current;32            if (current.activeSMask) {33                this.endSMaskGroup();34            }35            if (current.clipGroup) {36                this.ctx.restore();37                current.clipGroup = null;38            }39            this.pendingClip = null;40            this.pendingEOFill = false;41        },42        setLineWidth: function CanvasGraphics_setLineWidth(width) {43            this.current.lineWidth = width;44            this.ctx.lineWidth = width;45        },46        setLineCap: function CanvasGraphics_setLineCap(style) {47            this.current.lineCap = style;48            this.ctx.lineCap = LINE_CAP_STYLES[style];49        },50        setLineJoin: function CanvasGraphics_setLineJoin(style) {51            this.current.lineJoin = style;52            this.ctx.lineJoin = LINE_JOIN_STYLES[style];53        },54        setMiterLimit: function CanvasGraphics_setMiterLimit(limit) {55            this.current.miterLimit = limit;56            this.ctx.miterLimit = limit;57        },

Using AI Code Generation

1var canvas = document.getElementById('canvas');2var ctx = canvas.getContext('2d');3ctx.fillStyle = "rgba(255, 0, 0, 0.5)";4ctx.fillRect(10, 10, 100, 100);5ctx.fillStyle = "rgba(0, 255, 0, 0.5)";6ctx.fillRect(50, 10, 100, 100);7ctx.fillStyle = "rgba(0, 0, 255, 0.5)";8ctx.fillRect(90, 10, 100, 100);9ctx.fillStyle = "rgba(255, 255, 0, 0.5)";10ctx.fillRect(130, 10, 100, 100);11ctx.fillStyle = "rgba(255, 0, 255, 0.5)";12ctx.fillRect(170, 10, 100, 100);13ctx.fillStyle = "rgba(0, 255, 255, 0.5)";14ctx.fillRect(210, 10, 100, 100);15ctx.fillStyle = "rgba(255, 255, 255, 0.5)";16ctx.fillRect(250, 10, 100, 100);17ctx.fillStyle = "rgba(0, 0, 0, 0.5)";18ctx.fillRect(290, 10, 100, 100);

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.