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HTML5 canvas drawImage Method

HTML5 track Tag Reference HTML5 canvas reference

Example

Draw a part of this image on the canvas:

The Scream

Canvas

Yor browser does not support the canvas tag.

JavaScript:

var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
var img=document.getElementById("scream");
ctx.drawImage(img,90,130,50,60,10,10,50,60);

Try it yourself »

Definition and Usage

The drawImage method is used when you want to use images on the canvas.

The drawImage method can also draw parts of an image, and/or increase/reduce the image size.

The drawImage method can take up to nine parameters, depending on what you want to do with the image.

The image object can be an image, a video, or another canvas element.

Video as a Image Object

Drawing frames from a video on the canvas:

Video:


Press Play to start the demonstration.

Canvas:
your browser does not support the canvas tag

Note: The canvas is drawing the current frame of the video, every 20 millisecond.

Try it yourself »

JavaScript Syntax

Placing the image on the canvas:

JavaScript syntax: context.drawImage(img,x,y);

Placing the image, and specify the width and height:

JavaScript syntax: context.drawImage(img,x,y,width,height);

Clipping an area of the image, placing that area, with the specified width and height:

JavaScript syntax: context.drawImage(img,sx,sy,swidth,sheight,dx,dy,dwidth,dheight);

Browser Support

Internet Explorer Firefox Opera Google Chrome Safari

The drawImage method is supported in all major browsers.

Parameter Values

Parameter Values Description Play it
img image
video
canvas		 The image object to use in the drawing  
x x-coordinate The x coordinate of where to position the top-left corner of the image Play it »
y y-coordinate The y coordinate of where to position the top-left corner of the image Play it »
width width The width of the drawing (image), in pixels Play it »
height height The height of the drawing (image), in pixels Play it »
dx x-coordinate The x coordinate of where to position the clipped part of the image Play it »
dy y-coordinate The y coordinate of where to position the clipped part of the image Play it »
dwidth width The width of the clipped part of the image, in pixels Play it »
dheight height The height of the clipped part of the image, in pixels Play it »

HTML5 track Tag Reference HTML5 canvas reference

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