# vImage Buffer Type Codes Constants that specify the contents of vImage buffers. ## Topics ### Type [`typealias vImageBufferTypeCode`](/documentation/Accelerate/vImageBufferTypeCode) Type codes, such as chrominance or luminance, for the contents of a vImage buffer. ### Constants [`var kvImageBufferTypeCode_Alpha: Int`](/documentation/Accelerate/kvImageBufferTypeCode_Alpha) The buffer contains the alpha channel. [`var kvImageBufferTypeCode_CGFormat: Int`](/documentation/Accelerate/kvImageBufferTypeCode_CGFormat) The buffer contains data describable as a vImage Core Graphics image format as a single buffer. [`var kvImageBufferTypeCode_CMYK_Black: Int`](/documentation/Accelerate/kvImageBufferTypeCode_CMYK_Black) If the image has a CMYK color model, the buffer contains the black channel. [`var kvImageBufferTypeCode_CMYK_Cyan: Int`](/documentation/Accelerate/kvImageBufferTypeCode_CMYK_Cyan) If the image has a CMYK color model, the buffer contains the cyan channel. [`var kvImageBufferTypeCode_CMYK_Magenta: Int`](/documentation/Accelerate/kvImageBufferTypeCode_CMYK_Magenta) If the image has a CMYK color model, the buffer contains the magenta channel. [`var kvImageBufferTypeCode_CMYK_Yellow: Int`](/documentation/Accelerate/kvImageBufferTypeCode_CMYK_Yellow) If the image has a CMYK color model, the buffer contains the yellow channel. [`var kvImageBufferTypeCode_CVPixelBuffer_YCbCr: Int`](/documentation/Accelerate/kvImageBufferTypeCode_CVPixelBuffer_YCbCr) The buffer contains luminance and both chroma channels interleaved according to the [`vImageConstCVImageFormat`](/documentation/Accelerate/vImageConstCVImageFormat) image type. [`var kvImageBufferTypeCode_Cb: Int`](/documentation/Accelerate/kvImageBufferTypeCode_Cb) The buffer contains the blue chrominance channel. [`var kvImageBufferTypeCode_Chroma: Int`](/documentation/Accelerate/kvImageBufferTypeCode_Chroma) The buffer contains both chrominance channels, interleaved. [`var kvImageBufferTypeCode_Chunky: Int`](/documentation/Accelerate/kvImageBufferTypeCode_Chunky) The buffer contains chunky data not describable as a vImage Core Graphics image format. [`var kvImageBufferTypeCode_ColorSpaceChannel1: Int`](/documentation/Accelerate/kvImageBufferTypeCode_ColorSpaceChannel1) [`var kvImageBufferTypeCode_ColorSpaceChannel10: Int`](/documentation/Accelerate/kvImageBufferTypeCode_ColorSpaceChannel10) [`var kvImageBufferTypeCode_ColorSpaceChannel11: Int`](/documentation/Accelerate/kvImageBufferTypeCode_ColorSpaceChannel11) [`var kvImageBufferTypeCode_ColorSpaceChannel12: Int`](/documentation/Accelerate/kvImageBufferTypeCode_ColorSpaceChannel12) [`var kvImageBufferTypeCode_ColorSpaceChannel13: Int`](/documentation/Accelerate/kvImageBufferTypeCode_ColorSpaceChannel13) [`var kvImageBufferTypeCode_ColorSpaceChannel14: Int`](/documentation/Accelerate/kvImageBufferTypeCode_ColorSpaceChannel14) [`var kvImageBufferTypeCode_ColorSpaceChannel15: Int`](/documentation/Accelerate/kvImageBufferTypeCode_ColorSpaceChannel15) [`var kvImageBufferTypeCode_ColorSpaceChannel16: Int`](/documentation/Accelerate/kvImageBufferTypeCode_ColorSpaceChannel16) [`var kvImageBufferTypeCode_ColorSpaceChannel2: Int`](/documentation/Accelerate/kvImageBufferTypeCode_ColorSpaceChannel2) [`var kvImageBufferTypeCode_ColorSpaceChannel3: Int`](/documentation/Accelerate/kvImageBufferTypeCode_ColorSpaceChannel3) [`var kvImageBufferTypeCode_ColorSpaceChannel4: Int`](/documentation/Accelerate/kvImageBufferTypeCode_ColorSpaceChannel4) [`var kvImageBufferTypeCode_ColorSpaceChannel5: Int`](/documentation/Accelerate/kvImageBufferTypeCode_ColorSpaceChannel5) [`var kvImageBufferTypeCode_ColorSpaceChannel6: Int`](/documentation/Accelerate/kvImageBufferTypeCode_ColorSpaceChannel6) [`var kvImageBufferTypeCode_ColorSpaceChannel7: Int`](/documentation/Accelerate/kvImageBufferTypeCode_ColorSpaceChannel7) [`var kvImageBufferTypeCode_ColorSpaceChannel8: Int`](/documentation/Accelerate/kvImageBufferTypeCode_ColorSpaceChannel8) [`var kvImageBufferTypeCode_ColorSpaceChannel9: Int`](/documentation/Accelerate/kvImageBufferTypeCode_ColorSpaceChannel9) [`var kvImageBufferTypeCode_Cr: Int`](/documentation/Accelerate/kvImageBufferTypeCode_Cr) The buffer contains the red chrominance channel. [`var kvImageBufferTypeCode_EndOfList: Int`](/documentation/Accelerate/kvImageBufferTypeCode_EndOfList) End of list marker. [`var kvImageBufferTypeCode_Indexed: Int`](/documentation/Accelerate/kvImageBufferTypeCode_Indexed) The buffer contains data in an indexed colorspace. [`var kvImageBufferTypeCode_LAB_A: Int`](/documentation/Accelerate/kvImageBufferTypeCode_LAB_A) If the image has a LAB color model, the buffer contains the *a** channel. [`var kvImageBufferTypeCode_LAB_B: Int`](/documentation/Accelerate/kvImageBufferTypeCode_LAB_B) If the image has a LAB color model, the buffer contains the *b** channel. [`var kvImageBufferTypeCode_LAB_L: Int`](/documentation/Accelerate/kvImageBufferTypeCode_LAB_L) If the image has a LAB color model, the buffer contains the *L** channel. [`var kvImageBufferTypeCode_Luminance: Int`](/documentation/Accelerate/kvImageBufferTypeCode_Luminance) The buffer contains only luminance data. [`var kvImageBufferTypeCode_Monochrome: Int`](/documentation/Accelerate/kvImageBufferTypeCode_Monochrome) The buffer contains a single color channel. [`var kvImageBufferTypeCode_RGB_Blue: Int`](/documentation/Accelerate/kvImageBufferTypeCode_RGB_Blue) If the image has a RGB color model, the buffer contains the blue channel. [`var kvImageBufferTypeCode_RGB_Green: Int`](/documentation/Accelerate/kvImageBufferTypeCode_RGB_Green) If the image has a RGB color model, the buffer contains the green channel. [`var kvImageBufferTypeCode_RGB_Red: Int`](/documentation/Accelerate/kvImageBufferTypeCode_RGB_Red) If the image has a RGB color model, the buffer contains the red channel. [`var kvImageBufferTypeCode_UniqueFormatCount: Int`](/documentation/Accelerate/kvImageBufferTypeCode_UniqueFormatCount) [`var kvImageBufferTypeCode_XYZ_X: Int`](/documentation/Accelerate/kvImageBufferTypeCode_XYZ_X) If the image has a XYZ color model, the buffer contains the *X* channel. [`var kvImageBufferTypeCode_XYZ_Y: Int`](/documentation/Accelerate/kvImageBufferTypeCode_XYZ_Y) If the image has a XYZ color model, the buffer contains the *Y* channel. [`var kvImageBufferTypeCode_XYZ_Z: Int`](/documentation/Accelerate/kvImageBufferTypeCode_XYZ_Z) If the image has a XYZ color model, the buffer contains the *Z* channel. --- 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)