How to use HTML5 Canvas Pattern

This article describes about HTML5 Canvas Pattern.
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HTML5 Canvas Pattern

For create pattern in HTML5 use the createPattern() method of the canvas context, then we can set it style using the fillStyle property, and fill it shape using the fill() method. And createPattern() method requires image object and repeat option, these are repeated repeat-x, repeat-y, or no-repeat. The repeat option is defaulted to repeat.

Syntax:

<script>

  var patt = context.createPattern(imageObj, repeatOption);

  context.fillStyle = patt;

  context.fill();

</script>

 

Example:

<!DOCTYPE HTML>

<html>

  <head>

    <style>

      body {

        margin: 0px;

        padding: 0px;

      }

      #myCanvas {

        border: 1px solid #9C9898;

      }

    </style>

    <script>

        window.onload = function () {

            var canvas = document.getElementById("myCanvas");

            var context = canvas.getContext("2d");

 

            var imageObj = new Image();

            imageObj.onload = function () {

                var patt = context.createPattern(imageObj, "repeat");

                context.rect(15, 15, canvas.width - 20, canvas.height - 20);

                context.fillStyle = patt;

                context.fill();

            };

            imageObj.src="pattern.jpg";

        };

    </script>

  </head>

  <body>

    <canvas id="myCanvas" width="578" height="200"></canvas>

  </body>

</html>

 

output

HTML5 canvas pattern pic 3.jpg

Further Readings

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