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HTML canvas scale() Method

Canvas Object Reference Canvas Object

Example

Draw a rectangle, scale to 200%, then draw rectangle again:

YourbrowserdoesnotsupporttheHTML5canvastag.

JavaScript:

var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
ctx.strokeRect(5,5,25,15);
ctx.scale(2,2);
ctx.strokeRect(5,5,25,15);

Try it yourself »

Browser Support

Internet Explorer Firefox Opera Google Chrome Safari

Internet Explorer 9, Firefox, Opera, Chrome, and Safari support the scale() method.

Note: Internet Explorer 8 and earlier versions, do not support the <canvas> element.


Definition and Usage

The scale() method scales the current drawing, bigger or smaller.

Note: If you scale a drawing, all future drawings will also be scaled. The positioning will also be scaled. If you scale(2,2); drawings will be positioned twice as far from the left and top of the canvas as you specify.

JavaScript syntax: context.scale(scalewidth,scaleheight);

Parameter Values

Parameter Description Play it
scalewidth Scales the width of the current drawing (1=100%, 0.5=50%, 2=200%, etc.) Play it »
scaleheight Scales the height of the current drawing (1=100%, 0.5=50%, 2=200%, etc.) Play it »


Examples

More Examples

Example

Draw a rectangle, scale to 200%, draw rectangle again, scale to 200%, draw rectangle again, scale to 200%, draw rectangle again:

YourbrowserdoesnotsupporttheHTMLcanvastag.

JavaScript:

var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
ctx.strokeRect(5,5,25,15);
ctx.scale(2,2);
ctx.strokeRect(5,5,25,15);
ctx.scale(2,2);
ctx.strokeRect(5,5,25,15);
ctx.scale(2,2);
ctx.strokeRect(5,5,25,15);

Try it yourself »


Canvas Object Reference Canvas Object

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