Filterpedia | Core Image Filter Explorer & Showcase | iOS library
kandi X-RAY | Filterpedia Summary
kandi X-RAY | Filterpedia Summary
Core Image Filter explorer. Filterpedia is an iPad app for exploring (almost) the entire range of image filters offered by Apple's Core Image framework. It is designed as a companion app to my upcoming book, Core Image for Swift which is due for publication in February 2016. The UI is split into two sections: the table view on the left allows the user to navigate through and select a filter, the panel on the right then displays all the parameters of the selected filter which can be adjusted using horizontal sliders. Filterpedia is also a showcase for custom filters I'm creating that are discussed in the book. These include simple compositions of existing CIFilter, CIKernel based filters using GLSL and filters that use Metal kernel functions as their filtering engine.
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QUESTION
I'm trying to port some CIFilter
from this source by using metal shading language for Core Image.
I have a palette of color composed by an array of RGB
struct and I want to pass them as an argument to a custom CI color image kernel.
The RGB struct is converted into an array of SIMD3
.
ANSWER
Answered 2019-Sep-02 at 07:28Core Image kernels don't seem to support pointer or array parameter types. Though there seem to be something coming with iOS 13. From the Release Notes:
Metal CIKernel instances support arguments with arbitrarily structured data.
But, as so often with Core Image, there seem to be no further documentation for that…
However, you can still use the "old way" of passing buffer data by wrapping it in a CIImage
and sampling it in the kernel. For example:
QUESTION
I am trying to write an helper function that applies a color mask to a given image. My function has to set all opaque pixels of an image to the same color.
Here is what I have so far :
...ANSWER
Answered 2018-May-11 at 13:24I finally wrote a CIColorKernel, as @dfd suggested and it works fine:
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