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Before You Get Started

Go to the image unit sample provided with the developer tools. See Developer > Examples > Quartz > Core Image > CIDemoImageUnit. The directory should have the files shown in Figure 4-1. When you create an image unit, you should have similar files. This image unit contains one filter, FunHouseMirror. Each filter in an image unit typically has three files: an interface file for the filter class, the associated implementation file, and a kernel file. As you can see in the figure, this is true for the FunHouseMirror filter: FunHouseMirrorFilter.h, FunHouseMirrorFilter.m, and funHouseMirror.cikernel.

Each image unit should also have interface and implementation files for the CIPlugInRegistration protocol. In the figure, see MyPlugInLoader.h and MyPlugInLoader.m. The other important file that you’ll need to modify is the Description.plist file.

Now that you know a bit about the files in an image unit project, you’re ready to create one.

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