Safari Books Online is a digital library providing on-demand subscription access to thousands of learning resources.
- Create BookmarkCreate Bookmark
- Create Note or TagCreate Note or Tag
- DownloadDownload
- PrintPrint
11.1. Canvas
With HTML5’s Canvas API, we’re no longer limited to drawing rectangles on our sites. We can draw anything we can imagine, all through JavaScript. This can improve the performance of our websites by avoiding the need to download images off the network. With canvas, we can draw shapes and lines, arcs and text, gradients and patterns. In addition, canvas gives us the power to manipulate pixels in images and even video. We’ll start by introducing some of the basic drawing features of canvas, but then move on to using its power to transform our video—taking our modern-looking color video and converting it into conventional black and white to match the overall look and feel of The HTML5 Herald.
