How to define options for CIFIlter?

Question

When creating a raw image with CIFilter, I need to provide and identifier hint for the raw image decoder. How do I do this?

The following code does not populate the dictionary and CIFilter returns nil.

How would I do this correctly? I am completely stuck.

Code Block let rfo = [ String(kCGImageSourceTypeIdentifierHint) : "com.sony.raw-image" ] as! [CIRAWFilterOption:Any]
let cii = CIFilter(imageData: data , options: rfo).outputImage

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Planet30

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Answer 1

Are you sure kCGImageSourceTypeIdentifierHint is the right key for your purpose?
The doc of kCGImageSourceTypeIdentifierHint says This key can be provided in the options dictionary when you create a CGImageSource object, no mention about CIFilter.
At least, the key needs to be of type CIRAWFilterOption, not String.

Code Block         let sourceTypeIdentifierHint = CIRAWFilterOption(rawValue: kCGImageSourceTypeIdentifierHint as String)
        let rfo: [CIRAWFilterOption: Any] = [
            sourceTypeIdentifierHint : "com.sony.raw-image"
        ]

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OOPer

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Answer 2

Are you sure kCGImageSourceTypeIdentifierHint is the right key for your purpose?
The doc of kCGImageSourceTypeIdentifierHint says This key can be provided in the options dictionary when you create a CGImageSource object, no mention about CIFilter.
At least, the key needs to be of type CIRAWFilterOption, not String.

Code Block         let sourceTypeIdentifierHint = CIRAWFilterOption(rawValue: kCGImageSourceTypeIdentifierHint as String)
        let rfo: [CIRAWFilterOption: Any] = [
            sourceTypeIdentifierHint : "com.sony.raw-image"
        ]

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OOPer

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Answer 3

Thank you for explaining the syntax. Excellent!

Good point about CGImageSourceOption. According to the CIFilter initializer, it is recommended to provide this option.

I will test this later today.

Posted by

Planet30

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Answer 4

According to the CIFilter initializer, it is recommended to provide this option.

Thanks. I was missing that part.

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OOPer

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How to define options for CIFIlter?

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