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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.
LambdaTest Learning Hubs:
- JUnit Tutorial
- TestNG Tutorial
- Webdriver Tutorial
- WebDriverIO Tutorial
- Protractor Tutorial
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- Jenkins Tutorial
- NUnit Tutorial
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- Playwright Tutorial
- Cypress Tutorial
- PyTest Tutorial
YouTube
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