Core Animation: Simplified Animation Techniques for Mac® and iPhone® Development

Chapter 6. Layer Filters

In This Chapter

• Applying Filters to Core Animation Layers

• Controlling Filter Values with Data Bindings

• Applying Filters to Transitions

As with most Apple technologies, Core Animation provides a means to bridge into other core capabilities. One such bridge enables the developer to interface directly with Core Image—Apple’s image manipulation and processing framework. This means that as a Core Animation programmer, you have at your disposal all the Core Image filtering capabilities.

Practically, this means that you can apply, for example, a Gaussian blur to a layer’s contents. You set the blur radius on the filter and apply it, or you can animate the blur radius and cause it to blur and then resolve to clear over ...