Contents

vImageConvert_ARGB8888ToRGB16U(_:_:_:_:_:_:)

Removes the alpha channel from an 8-bit-per-channel ARGB buffer to produce an unsigned 16-bit-per-channel RGB result.

Declaration

func vImageConvert_ARGB8888ToRGB16U(_ src: UnsafePointer<vImage_Buffer>, _ dest: UnsafePointer<vImage_Buffer>, _ permuteMap: UnsafePointer<UInt8>, _ copyMask: UInt8, _ backgroundColor: UnsafePointer<Pixel_16U>, _ flags: vImage_Flags) -> vImage_Error

Parameters

  • src:

    The source vImage buffer.

  • dest:

    A pointer to the destination vImage buffer structure. You’re responsible for filling out the Height, Width, and 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 destination image data. When you no longer need the data buffer, deallocate the memory to prevent memory leaks.

  • permuteMap:

    An array of four 8-bit integers with the values 0, 1, 2, and 3, in some order. Each value specifies the channel from the source image that the function copies to the destination channel at the corresponding index. 

  • copyMask:

    A bitmask that specifies the channel from the background color that the function copies to the destination channel at the corresponding index. The 1000 bit corresponds to the alpha channel, the 0100 bit corresponds to the red channel, the 0010 corresponds to the green channel, and the 0001 bit corresponds to the blue channel.

  • backgroundColor:

    A 16-bit-per-channel, 4-channel pixel value that replaces the destination pixels based on the copy mask.

  • flags:

    The options to use when performing the operation. If your code implements its own tiling or its own multithreading, pass Kvimagedonottile; otherwise, pass Kvimagenoflags.

Return Value

kvImageNoError; otherwise, one of the error codes in Data Types and Constants.

Discussion

This function doesn’t work in place.

See Also

Conversion from 8-bit-per-channel, 4-channel interleaved buffers