Book Image

Canvas Cookbook

Book Image

Canvas Cookbook

Overview of this book

With the growing popularity of HTML5 Canvas, this book offers tailored recipes to help you develop portable applications, presentations, and games. The recipes are simple yet creative and build on each other. At every step, the book inspires the reader to develop his/her own recipe. From basic to advanced, every aspect of Canvas API has been covered to guide readers to develop their own application, presentation, or game.
Table of Contents (16 chapters)
Canvas Cookbook
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Introduction


In this chapter, we will learn how to draw rectangles, triangles, circles, ellipses, and custom shapes. Also, we will learn to fill gradients, translation, rotation, and scaling to be applied on these shapes.

The recipe structure will be a bit different in this chapter. We will have the JavaScript code in a separate file and this file will be embedded in the HTML code at run-time. In the previous chapter, the complete recipe was in a single file (.html file). However, in this chapter, a single recipe will comprise two different files:

  • An HTML file

  • A JavaScript file

Also, the can (canvas) and ctx (context) objects are created within the init() function and the reference to ctx (context) is passed to the different functions called within init().