CVMetalBufferCacheCreateBufferFromImage(_:_:_:_:)
Declaration
func CVMetalBufferCacheCreateBufferFromImage(_ allocator: CFAllocator?, _ bufferCache: CVMetalBufferCache, _ imageBuffer: CVImageBuffer, _ bufferOut: UnsafeMutablePointer<CVMetalBuffer?>) -> CVReturnParameters
- allocator:
The CFAllocatorRef to use for allocating the CVMetalBuffer object. May be NULL.
- bufferCache:
The buffer cache object that will manage the buffer.
- bufferOut:
The newly created buffer object will be placed here.
Return Value
Returns kCVReturnSuccess on success
Discussion
Creates a CVMetalBuffer object from an existing CVImageBuffer
Creates or returns a cached CVMetalBuffer object mapped to the CVImageBuffer. This creates a live binding between the CVImageBuffer and underlying CVMetalBuffer buffer object.
IMPORTANT NOTE: Clients should retain CVMetalBuffer objects until they are done using the images in them.
Retaining a CVMetalBuffer is your way to indicate that you're still using the image in the buffer, and that it should not be recycled yet.