How to find the object scale factor of an image using FabricJS?-JS Tutorial-php.cn

Table of Contents

grammar

Use getTotalObjectScalingMethod

Example

Using the getTotalObjectScaling method

Use getTotalObjectScaling method and scaleX property

Using the getTotalObjectScaling method along with scaleX property

Home

Web Front-end

JS Tutorial

How to find the object scale factor of an image using FabricJS?

PHPz

Aug 23, 2023 pm 08:49 PM

How to find the object scale factor of an image using FabricJS?

In this tutorial, we will learn how to find the object scale factor of an image using FabricJS. We can create an image object by creating an instance of fabric.Image. Since it is one of the basic elements of FabricJS, we can also easily customize it by applying properties such as angle, opacity, etc. To find the object scaling factor of an image, we use the getTotalObjectScaling method.

grammar

1	`getTotalObjectScaling(): Object`

Copy after login

Use getTotalObjectScalingMethod

The Chinese translation of

Example

is:

Example

In this example, we use the getTotalObjectScaling method to get the object scaling factor of the image. In this case, the recorded output is approximately 1.5 for scaleX and scaleY respectively.

<!DOCTYPE html>
<html>
<head>
   <!-- Adding the Fabric JS Library-->
   <script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
</head>
<body>
   <h2 id="Using-the-getTotalObjectScaling-method">Using the getTotalObjectScaling method</h2>
   <p>
      You can open the console from dev tools to see that the logged output
      contains the object scale factor
   </p>
   <canvas id="canvas"></canvas>
   <img  src="/static/imghw/default1.png"  data-src="https://www.tutorialspoint.com/images/logo.png"  class="lazy" id="img1"   style="max-width:90%" / alt="How to find the object scale factor of an image using FabricJS?" >
   <script>
      // Initiate a canvas instance
      var canvas = new fabric.Canvas("canvas");
      canvas.setWidth(document.body.scrollWidth);
      canvas.setHeight(250);
      // Initiating the image element
      var imageElement = document.getElementById("img1");
      // Initiate an Image object
      var image = new fabric.Image(imageElement, {
         top: 50,
         left: 110,
         skewX: 15,
      });
      // Add it to the canvas
      canvas.add(image);
      // Using the getTotalObjectScaling method
      console.log(
         "The scale factor of the Image object is: ",
         image.getTotalObjectScaling()
      );
   </script>
</body>
</html> 

Copy after login

Use getTotalObjectScaling method and scaleX property

The Chinese translation of

Example

is:

Example

Let's look at a code example of what the log output looks like when using the getTotalObjectScaling method with the scaleX property. Here, we set the value of the scaleX property to 2. So the log output shows that the value of scaleX is around 3, while the value of scaleY remains the same.

<!DOCTYPE html>
<html>
<head>
   <!-- Adding the Fabric JS Library-->
   <script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
</head>
<body>
   <h2 id="Using-the-getTotalObjectScaling-method-along-with-scaleX-property">Using the getTotalObjectScaling method along with scaleX property</h2>
   <p>
      You can open the console from dev tools to see that the logged output contains the object scale factor
   </p>
   <canvas id="canvas"></canvas>
   <img  src="/static/imghw/default1.png"  data-src="https://www.tutorialspoint.com/images/logo.png"  class="lazy" id="img1"   style="max-width:90%" / alt="How to find the object scale factor of an image using FabricJS?" >
   <script>
      // Initiate a canvas instance
      var canvas = new fabric.Canvas("canvas");
      canvas.setWidth(document.body.scrollWidth);
      canvas.setHeight(250);
       
      // Initiating the image element
      var imageElement = document.getElementById("img1");
       
      // Initiate an Image object
      var image = new fabric.Image(imageElement, {
         top: 50,
         left: 110,
         skewX: 15,
         scaleX: 2, 
      });
       
      // Add it to the canvas
      canvas.add(image);
       
      // Using the getTotalObjectScaling method
      console.log(
         "The scale factor of the Image object is: ",
         image.getTotalObjectScaling()
      );
   </script>
</body>
</html> 

Copy after login

The above is the detailed content of How to find the object scale factor of an image using FabricJS?. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress images for free

Clothoff.io

AI clothes remover

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)

3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

R.E.P.O. Best Graphic Settings

3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Assassin's Creed Shadows: Seashell Riddle Solution

2 weeks ago By DDD

R.E.P.O. How to Fix Audio if You Can't Hear Anyone

3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

WWE 2K25: How To Unlock Everything In MyRise

4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Where is the login entrance for gmail email?

7493

CakePHP Tutorial

1377

What is the format of the account name of steam

win11 activation key permanent

nyt connections hints and answers

Related knowledge

How do I create and publish my own JavaScript libraries? Mar 18, 2025 pm 03:12 PM

Article discusses creating, publishing, and maintaining JavaScript libraries, focusing on planning, development, testing, documentation, and promotion strategies.

How do I optimize JavaScript code for performance in the browser? Mar 18, 2025 pm 03:14 PM

The article discusses strategies for optimizing JavaScript performance in browsers, focusing on reducing execution time and minimizing impact on page load speed.

What should I do if I encounter garbled code printing for front-end thermal paper receipts? Apr 04, 2025 pm 02:42 PM

Frequently Asked Questions and Solutions for Front-end Thermal Paper Ticket Printing In Front-end Development, Ticket Printing is a common requirement. However, many developers are implementing...

How do I debug JavaScript code effectively using browser developer tools? Mar 18, 2025 pm 03:16 PM

The article discusses effective JavaScript debugging using browser developer tools, focusing on setting breakpoints, using the console, and analyzing performance.

How do I use source maps to debug minified JavaScript code? Mar 18, 2025 pm 03:17 PM

The article explains how to use source maps to debug minified JavaScript by mapping it back to the original code. It discusses enabling source maps, setting breakpoints, and using tools like Chrome DevTools and Webpack.

Who gets paid more Python or JavaScript? Apr 04, 2025 am 12:09 AM

There is no absolute salary for Python and JavaScript developers, depending on skills and industry needs. 1. Python may be paid more in data science and machine learning. 2. JavaScript has great demand in front-end and full-stack development, and its salary is also considerable. 3. Influencing factors include experience, geographical location, company size and specific skills.

Getting Started With Chart.js: Pie, Doughnut, and Bubble Charts Mar 15, 2025 am 09:19 AM

This tutorial will explain how to create pie, ring, and bubble charts using Chart.js. Previously, we have learned four chart types of Chart.js: line chart and bar chart (tutorial 2), as well as radar chart and polar region chart (tutorial 3). Create pie and ring charts Pie charts and ring charts are ideal for showing the proportions of a whole that is divided into different parts. For example, a pie chart can be used to show the percentage of male lions, female lions and young lions in a safari, or the percentage of votes that different candidates receive in the election. Pie charts are only suitable for comparing single parameters or datasets. It should be noted that the pie chart cannot draw entities with zero value because the angle of the fan in the pie chart depends on the numerical size of the data point. This means any entity with zero proportion

TypeScript for Beginners, Part 2: Basic Data Types Mar 19, 2025 am 09:10 AM

Once you have mastered the entry-level TypeScript tutorial, you should be able to write your own code in an IDE that supports TypeScript and compile it into JavaScript. This tutorial will dive into various data types in TypeScript. JavaScript has seven data types: Null, Undefined, Boolean, Number, String, Symbol (introduced by ES6) and Object. TypeScript defines more types on this basis, and this tutorial will cover all of them in detail. Null data type Like JavaScript, null in TypeScript

See all articles