Function

vImageConvert_Planar8toRGB565(_:_:_:_:_:)

Combines three Planar8 images into one RGB565 image.

Declaration

func vImageConvert_Planar8toRGB565(_ srcR: UnsafePointer<vImage_Buffer>, _ srcG: UnsafePointer<vImage_Buffer>, _ srcB: UnsafePointer<vImage_Buffer>, _ dest: UnsafePointer<vImage_Buffer>, _ flags: vImage_Flags) -> vImage_Error

Parameters

srcR

A pointer to a vImage buffer structure that contains the Planar8 image to use as the red channel of the destination image.

srcG

A pointer to a vImage buffer structure that contains the Planar8 image to use as the green channel of the destination image.

srcB

A pointer to a vImage buffer structure that contains the Planar8 image to use as the blue channel of the destination image.

dest

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.

flags

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.

Discussion

The function calculates the pixels in the destination image as follows:

    uint32_t red   = (8bitRedChannel   * (31*2) + 255) / (255*2)
    uint32_t green = (8bitGreenChannel * 63 + 127) / 255
    uint32_t blue  = (8bitBlueChannel  * 31 + 127) / 255
    uint16_t RGB565pixel = (red << 11) | (green <<  5) | blue

See Also

Converting from Planar Formats

func vImageConvert_FTo16S(UnsafePointer<vImage_Buffer>, UnsafePointer<vImage_Buffer>, Float, Float, vImage_Flags) -> vImage_Error

Converts a PlanarF image into a special format in which each pixel is a 16-bit signed integer.

func vImageConvert_FTo16U(UnsafePointer<vImage_Buffer>, UnsafePointer<vImage_Buffer>, Float, Float, vImage_Flags) -> vImage_Error

Converts a PlanarF image into a special format in which each pixel is a 16-bit unsigned integer.