Professional HTML5 Mobile Game Development

Summary

Canvas makes it possible to play around with pixel data directly. Although this is a feature that isn’t used often, it can be useful for a number of different circumstances in which you need pixel-perfect collisions or Canvas post-processing. However, be careful with how much per-pixel processing you use because many mobile devices are lighter on CPU horsepower than their desktop cousins, and you must be careful not to overload them.