HTML canvas transform() Method
Last Updated :
12 Jun, 2023
The transform() method is used to replace the current transformation matrix i.e. each object on the canvas has a current transformation matrix. The transform() method is used to multiply that current transformation matrix with the matrix described below:
a c e
b d f
0 0 1
It simply allows to scale, move, skew and rotate the current context.
Syntax:
context.transform(a, b, c, d, e, f);
Parameter Values:
- a denotes Horizontal scaling
- b denotes Horizontal skewing
- c denotes Vertical skewing
- d denotes Vertical scaling
- e denotes Horizontal moving
- f denotes Vertical moving
Example:
<!DOCTYPE html>
<html>
<body>
<h3 style="color:green">
GeeksforGeeks
</h3>
<h3 style="color:green">
HTML canvas transform() method
</h3>
<canvas id="gfgCanvas"
width="400"
height="300"
style="border:2px solid ;">
</canvas>
<script>
var gfg = document.getElementById("gfgCanvas");
var context = gfg.getContext("2d");
context.fillStyle = "green";
context.fillRect(80, 80, 200, 100)
context.transform(1, 0, 2, 2, 10, 10);
context.fillStyle = "black";
context.fillRect(20, 20, 20, 80);
</script>
</body>
</html>
|
Output:
Supported Browsers:
- Chrome
- Mozilla Firefox
- Internet Explorer 9.0
- Opera
- Safari
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