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As far as the user is concerned, there is also the issue of how to keep graphic processes from bringing your application to a halt. You need to keep graphics on a separate thread or use the GPU to get the job done, or both.
Although most of the book is concerned with the standard 2d graphics context, the final chapters explain the use of WebGL with Canvas as a general purpose rendering engine, including how to use it for 3D graphics and for fast 2D graphics.
What you will learn:
The canvas element and the fundamental ideas of a path and its stroke and fill properties
Transformations – organizing and using unit shapes as the building blocks for complex graphics
Working with text including typography and SVG Text
Clipping, compositing and effects
The Image object as a source of bitmaps
Image loading and saving using async and await
Sprite-based animation using web workers and Offscreencanvas
Files blobs and the Fetch API
Image processing, filters and convolution
Using Canvas with WebGL for 3D graphics display
Using WebGL to implements fast 2D graphics
- Paperback: 316 pages
- Publisher: I/O Press (September 9, 2019)
- Language: English
- ISBN-10: 1871962625
- ISBN-13: 978-1871962628
Programs - Live Listings
Notice that while some graphics systems treat drawing outside of the rendering window as an error, Canvas clips the graphic to the rending window.
Notice that while some graphics systems treat drawing outside of the rendering window as an error, Canvas clips the graphic to the rendering window.
Change lines like
var url = new URL("jeep.jpg", "http://host/Filter/");
img.src = url;
img.src = "relative path/jeep.jpg";
This is best regarded as a browser bug as both URLs are to the same origin but both Chrome and Firefox treat the url in the URL object as different even though it is to the same origin.