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Canvas Cookbook

You're reading from   Canvas Cookbook Over 80 simple but creative and structured recipes to explore the capabilities of HTML5 Canvas

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Product type Paperback
Published in May 2019
Publisher
ISBN-13 9781785284892
Length 254 pages
Edition 1st Edition
Languages
Tools
Concepts
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Toc

Table of Contents (11) Chapters Close

Preface 1. Paths and Text 2. Shapes and Composites FREE CHAPTER 3. Animation 4. Images and Videos 5. Interactivity through Events 6. Creating Graphs and Charts 7. 3D Modeling 8. Game Development 9. Interoperability and Deployment Index

Drawing and cropping an image

Let's jump right in by drawing a simple image. In this recipe, you'll learn how to load an image and draw it on the canvas. Also, you will learn to crop an image:

Drawing and cropping an image

Follow these steps to draw an image on the canvas.

How to do it

The HTML code to complete this recipe is as follows:

<html>
<head>
<title>Image</title>
<script src="ImageDrawing.js"></script>
</head>
<body onload="init();">
<center>
<canvas id="MyCanvasArea" width="900" height="420" style="border:2px solid blue;" >your browser does not support canvas</canvas>
<h1>An Image</h1>
</center>
</body>
</html>

The JavaScript code:

var can;
var ctx;
var boyimage;
function init()
{
  can = document.getElementById('MyCanvasArea'),
  ctx = can.getContext('2d');

  draw();

  function draw()
  {
    boyimage = new Image();
    boyimage...
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