Converts an ARGB1555 image to an ARGB8888 image.


func vImageConvert_ARGB1555toARGB8888(_ src: UnsafePointer<vImage_Buffer>, _ dest: UnsafePointer<vImage_Buffer>, _ flags: vImage_Flags) -> vImage_Error



A pointer to a vImage buffer structure that contains the source image whose data you want to convert.


A pointer to a vImage buffer data 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, you must deallocate the memory.


The options to use when performing the operation. If you plan to perform your own tiling or use multithreading, pass kvImageDoNotTile.

Return Value

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


The ARGB1555 format has 16-bit pixels with 1 bit for alpha and 5 bits each for red, green, and blue. The function calculates the 8-bit pixels in the destination image as follows:

    Pixel8 alpha =  1bitAlphaChannel * 255
    Pixel8 red   = (5bitRedChannel   * 255 + 15) / 31
    Pixel8 green = (5bitGreenChannel * 255 + 15) / 31
    Pixel8 blue  = (5bitBlueChannel  * 255 + 15) / 31

See Also

Converting from ARGB Formats

func vImageConvert_ARGBFFFFtoRGBFFF(UnsafePointer<vImage_Buffer>!, UnsafePointer<vImage_Buffer>!, vImage_Flags) -> vImage_Error

Converts a four-channel ARGBFFFF image to a three-channel RGBFFF image by removing the alpha channel.

func vImageConvert_ARGB8888toRGB888(UnsafePointer<vImage_Buffer>, UnsafePointer<vImage_Buffer>, vImage_Flags) -> vImage_Error

Converts a four-channel ARGB8888 image to a three-channel RGB888 image by removing the alpha channel..