---
title: "vImageConvert_BGRA8888toRGB565(_:_:_:)"
framework: accelerate
role: symbol
role_heading: Function
path: "accelerate/vimageconvert_bgra8888torgb565(_:_:_:)"
---

# vImageConvert_BGRA8888toRGB565(_:_:_:)

Removes the alpha channel from an 8-bit-per-channel RGBA buffer to produce an RGB565 result.

## Declaration

```swift
func vImageConvert_BGRA8888toRGB565(_ src: UnsafePointer<vImage_Buffer>, _ dest: UnsafePointer<vImage_Buffer>, _ 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 doc://com.apple.accelerate/documentation/Accelerate/vImage_Buffer/height, doc://com.apple.accelerate/documentation/Accelerate/vImage_Buffer/width, and doc://com.apple.accelerate/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 destination image data. When you no longer need the data buffer, deallocate the memory to prevent memory leaks.
- `flags`: The options to use when performing the operation. If your code implements its own tiling or its own multithreading, pass doc://com.apple.accelerate/documentation/Accelerate/kvImageDoNotTile; otherwise, pass doc://com.apple.accelerate/documentation/Accelerate/kvImageNoFlags.

## Return Value

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

## Discussion

Discussion The function uses the following calculation to perform the conversion:     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

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

- [vImageConvert_ARGB8888toRGB888(_:_:_:)](accelerate/vimageconvert_argb8888torgb888(_:_:_:).md)
- [vImageConvert_RGBA8888toRGB888(_:_:_:)](accelerate/vimageconvert_rgba8888torgb888(_:_:_:).md)
- [vImageConvert_BGRA8888toRGB888(_:_:_:)](accelerate/vimageconvert_bgra8888torgb888(_:_:_:).md)
- [vImageConvert_ARGB8888toRGB565(_:_:_:)](accelerate/vimageconvert_argb8888torgb565(_:_:_:).md)
- [vImageConvert_ARGB8888toRGB565_dithered(_:_:_:_:_:)](accelerate/vimageconvert_argb8888torgb565_dithered(_:_:_:_:_:).md)
- [vImageConvert_BGRA8888toRGB565_dithered(_:_:_:_:_:)](accelerate/vimageconvert_bgra8888torgb565_dithered(_:_:_:_:_:).md)
- [vImageConvert_RGBA8888toRGB565_dithered(_:_:_:_:_:)](accelerate/vimageconvert_rgba8888torgb565_dithered(_:_:_:_:_:).md)
- [vImageConvert_RGBA8888toRGB565(_:_:_:)](accelerate/vimageconvert_rgba8888torgb565(_:_:_:).md)
- [vImageConvert_ARGB8888ToRGB16U(_:_:_:_:_:_:)](accelerate/vimageconvert_argb8888torgb16u(_:_:_:_:_:_:).md)