Canvas Pattern
How to Create Pattern
To create pattern, follow these steps
- canvas - Assigning the canvas element to a variable.
- ctx - Assigning the 2d rendering context to another variable by calling the
getContext('2d')method. - img - Assigning a blank DOM object for a HTML img element by using the Image class to a variable.
- src - Setting the src attribute to the path of a valid image file, you load that image into the image object just as if you set the src attribute of an actual HTML img element.
- ptrn - Assigning a pattern with specified image and repetition using
createPattern()canvas method to a variable. - fillStyle - Use
fillStylecanvas property to specify the pattern to use inside shapes (any shape). - fillRect() - Use
fillRect()canvas method to draws a rectangle that is filled according to the currentfillStyle.
Example
HTML Online Editor
<!DOCTYPE html>
<html lang="en-US">
<body>
<canvas id="point" width="200" height="200">
Your browser does not support the canvas element.
</canvas>
<script>
window.onload = function() {
var canvas = document.getElementById("point");
var ctx = canvas.getContext("2d");
var img = new Image();
img.src = 'apple.png';
img.onload = function() {
var ptrn = ctx.createPattern(img,'repeat');
ctx.fillStyle = ptrn;
ctx.fillRect(0, 0, 200, 200);
}
};
</script>
</body>
</html>
Syntax
ctx.createPattern(image, repetition)
Attributes Value
| Value | Explanation |
|---|---|
| image | Specifies an image to be used as the pattern. |
| repetition | Specifies how to repeat the pattern's image.
|
Reminder
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