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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 FREE CHAPTER 2. Shapes and Composites 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 a mirror image


Everyone knows what a mirror image looks like. So here is the output of our new recipe:

How to do it

The recipe goes as follows:

The HTML code:

<html>
<head>
<title>Image</title>
<script src="MirrorImage.js"></script>
</head>
<body onload="init();">
<center>
<canvas id="MyCanvasArea" width="440" height="440" style="border:2px solid blue;" > your browser does not support canvas</canvas>
<h1>A mirror image</h1>
</center>
</body>
</html>

The JavaScript code:


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

  draw();

  function draw()
  {
    flowerimage = new Image();
    flowerimage.src = 'goodmorning.jpg';
    flowerimage.onload = function(){
      ctx.drawImage(flowerimage,10,10,200,200);
      ctx.save();
     
      ctx.scale(1,-1);
      ctx.translate(0, -100);
      ctx.drawImage(flowerimage...
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