createPattern() Method - Javascript Canvas Reference

Javascript examples for Canvas Reference:createPattern

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Description

The createPattern() method repeats the specified element, which can be an image, video, or another <canvas> element, in the direction.

JavaScript syntax 

context.createPattern(image, "repeat|repeat-x|repeat-y|no-repeat");

Parameter Values

Parameter Description
image image, canvas, or video element to use
repeatDefault. The pattern repeats both horizontally and vertically
repeat-x The pattern repeats only horizontally
repeat-y The pattern repeats only vertically
no-repeat The pattern will be displayed only once (no repeat)

Example

Repeat an image both horizontally and vertically:

JavaScript:

Demo Code

ResultView the demo in separate window 

<!DOCTYPE html>
<html>
<body>

<p>Image to use:</p>
<img src="http://java2s.com/resources/a.png" id="lamp" width="32" height="32">
<p>Canvas:</p>

<button onclick="draw('repeat')">Repeat</button>
<button onclick="draw('repeat-x')">Repeat-x</button>
<button onclick="draw('repeat-y')">Repeat-y</button>
<button onclick="draw('no-repeat')">No-repeat</button>

<canvas id="myCanvas" width="300" height="250" style="border:1px solid #d3d3d3;">
Your browser does not support the HTML5 canvas tag.</canvas>

<script>

function draw(direction) {
    var c = document.getElementById("myCanvas");
    var ctx = c.getContext("2d");
    ctx.clearRect(0, 0, c.width, c.height);
    var img = document.getElementById("lamp")
    var pat = ctx.createPattern(img, direction);
    ctx.rect(0, 0, 150, 120);//w ww.  jav a  2 s. co  m
    ctx.fillStyle = pat;
    ctx.fill();
}

</script>

</body>
</html>

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