Can I use Metal to modify a RAW photo image, and then save it to file?

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Created Mar ’21

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I got a RAW Image CGImage from file, its pixel format is <CV14BayerRggb 1919379252>

then, convert it to MTLTexture <RGBA16Uint>

then, modify some pixel color and write to another MTLTexture <RGBA16Uint>

then, I want to create a CIImage from output texture,

there raised a error told me create CIImage failed, unsupported texutre format.

Answered by Graphics and Games Engineer in 664631022

I assume you're getting an error when you call -[CImage imageWithMTLTexture:options:]?

CIImage only supports some basic texture formats and MTLTextureFormatRGBA16Uint isn't one of them. Why have you chosen that format in particular? Can you use RGBA32Float or RGBA16Float instead?

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Answer 1

Graphics and Games Engineer OP

Apple

Mar ’21

Accepted Answer

I assume you're getting an error when you call -[CImage imageWithMTLTexture:options:]?

CIImage only supports some basic texture formats and MTLTextureFormatRGBA16Uint isn't one of them. Why have you chosen that format in particular? Can you use RGBA32Float or RGBA16Float instead?

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Answer 2

PhonJac OP

Mar ’21

You are right, thank you

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