HTML canvas scale() Method

Last Updated : 12 Jun, 2023

The HTML canvas scale() Method is used to scale the current drawing into smaller or larger size. After scaling the drawing, all the feature of drawing scaled. It will have to define before the canvas. Syntax:

context.scale( scalewidth, scaleheight )

Parameter Values:

scalewidth: It scale the width of current drawing, (1=100%, 0.5=50%, 2=200%, and so on).
scaleheight: It scale the height of current drawing, (1=100%, 0.5=50%, 2=200%, and so on)

Example 1: This example uses canvas scale() Method to increase the drawing size.

html

<!DOCTYPE html>  
<html>  
  
<head>  
    <title>  
        HTML canvas scale() Method 
    </title>  
</head>  
  
<body>  
<center> 
<h1 style="color:green">GeeksforGeeks</h1> 
    <canvas id="GFG"
            width="500"
            height="300">  
</canvas>  
  
    <script>  
        var x =  
            document.getElementById("GFG");  
        var context =  
            x.getContext("2d");  
        context.strokeRect(10, 10, 150, 100);  
        context.scale(2, 2); 
        context.strokeRect(50, 50, 150, 100); 
    </script>  
<center> 
</body>  
  
</html>  

Output: Example 2: This example uses canvas scale() Method to decrease the drawing size.

html

<!DOCTYPE html>  
<html>  
  
<head>  
    <title>  
        HTML canvas scale() Method 
    </title>  
</head>  
  
<body>  
<center> 
<h1 style="color:green">GeeksforGeeks</h1> 
    <canvas id="GFG"
            width="500"
            height="300">  
</canvas>  
  
    <script>  
        var x = document.getElementById("GFG");  
        var context = x.getContext("2d");  
        context.strokeRect(10, 10, 150, 100);  
        context.scale(0.5, 0.5); 
        context.strokeRect(50, 50, 150, 100); 
    </script>  
</center> 
</body>  
  
</html>                     