# vImageConvert_ARGBFFFFtoPlanar8(_:_:_:_:_:_:_:_:) Deinterleaves a floating-point 32-bit-per-channel, 4-channel interleaved buffer into four 8-bit planar buffers. ``` func vImageConvert_ARGBFFFFtoPlanar8(_ src: UnsafePointer!, _ alpha: UnsafePointer!, _ red: UnsafePointer!, _ green: UnsafePointer!, _ blue: UnsafePointer!, _ maxFloat: UnsafePointer!, _ minFloat: UnsafePointer!, _ flags: vImage_Flags) -> vImage_Error ``` ## Parameters `src` The source vImage buffer. `alpha` A pointer to the alpha destination vImage buffer structure. You’re responsible for filling out the [`height`](/documentation/Accelerate/vImage_Buffer/height), [`width`](/documentation/Accelerate/vImage_Buffer/width), and [`rowBytes`](/documentation/Accelerate/vImage_Buffer/rowBytes) fields of this structure, and for allocating a data buffer of the appropriate size. On return, the data buffer this structure points to contains the alpha destination image data. When you no longer need the data buffer, deallocate the memory to prevent memory leaks. `red` A pointer to the red destination vImage buffer structure. You’re responsible for filling out the [`height`](/documentation/Accelerate/vImage_Buffer/height), [`width`](/documentation/Accelerate/vImage_Buffer/width), and [`rowBytes`](/documentation/Accelerate/vImage_Buffer/rowBytes) fields of this structure, and for allocating a data buffer of the appropriate size. On return, the data buffer this structure points to contains the red destination image data. When you no longer need the data buffer, deallocate the memory to prevent memory leaks. `green` A pointer to the green destination vImage buffer structure. You’re responsible for filling out the [`height`](/documentation/Accelerate/vImage_Buffer/height), [`width`](/documentation/Accelerate/vImage_Buffer/width), and [`rowBytes`](/documentation/Accelerate/vImage_Buffer/rowBytes) fields of this structure, and for allocating a data buffer of the appropriate size. On return, the data buffer this structure points to contains the green destination image data. When you no longer need the data buffer, deallocate the memory to prevent memory leaks. `blue` A pointer to the blue destination vImage buffer structure. You’re responsible for filling out the [`height`](/documentation/Accelerate/vImage_Buffer/height), [`width`](/documentation/Accelerate/vImage_Buffer/width), and [`rowBytes`](/documentation/Accelerate/vImage_Buffer/rowBytes) fields of this structure, and for allocating a data buffer of the appropriate size. On return, the data buffer this structure points to contains the blue destination image data. When you no longer need the data buffer, deallocate the memory to prevent memory leaks. `maxFloat` The maximum source pixel value. `minFloat` The minimum source pixel value. `flags` The options to use when performing the operation. If your code implements its own tiling or its own multithreading, pass [`kvImageDoNotTile`](/documentation/Accelerate/kvImageDoNotTile); otherwise, pass [`kvImageNoFlags`](/documentation/Accelerate/kvImageNoFlags). ## Return Value [`kvImageNoError`](/documentation/Accelerate/kvImageNoError); otherwise, one of the error codes in . ## Discussion The function uses the following calculation to perform the conversion: ```objc uint8_t result = SATURATED_CLIP_0_to_255( 255.0f * ( srcPixel - minFloat ) / (maxFloat - minFloat) + 0.5f ); ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)