Creating alpha masks from text on the iPhone and Mac
https://www.cocoawithlove.com/2009/09/creating-alpha-masks-from-text-on.html
september 2018 ‧ core-graphics dev ios ‧ open in karakeep
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Alpha masks are a powerful way to create graphical effects in your program. In this post, I’ll show you how to create an alpha mask from a text string and use that mask to create text-based effects with an image. I’ll also show you how to do this on the iPhone and the Mac, so you can see the differences between these platforms in this area.
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