# outputImageProviderFromBuffer(withPixelFormat:pixelsWide:pixelsHigh:baseAddress:bytesPerRow:releaseCallback:releaseContext:colorSpace:shouldColorMatch:) Returns an image provider from a single memory buffer. ``` func outputImageProviderFromBuffer(withPixelFormat format: String!, pixelsWide width: Int, pixelsHigh height: Int, baseAddress: UnsafeRawPointer!, bytesPerRow rowBytes: Int, releaseCallback callback: QCPlugInBufferReleaseCallback!, releaseContext context: UnsafeMutableRawPointer!, colorSpace: CGColorSpace!, shouldColorMatch colorMatch: Bool) -> Any! ``` ## Parameters `format` The pixel format of the memory buffer. This must be compatible with the color space. `width` The width, in bytes, of the memory buffer. `height` The height, in bytes, of the memory buffer. `baseAddress` The base address of the memory buffer, which must be multiple of 16. `rowBytes` The number of bytes per row of the memory buffer, which must be multiple of 16. `callback` The release callback. Your callback must use this type definition: ```objc typedef void (*QCPlugInBufferReleaseCallback)(const void* address, void* context); ``` If you name your callback function `MyQCPlugInBufferReleaseCallback` , you would declare it like this: ```objc void MyQCPlugInBufferReleaseCallback (const void address, void * context); ``` Quartz Composer invokes your callback when the memory buffer is no longer needed. The callback can be called from any thread at any time `context` The context to pass to the release callback. `colorSpace` The color space of the memory buffer. This must be compatible with the pixel format. `colorMatch` A Boolean that specifies whether Quartz Composer should color match the image. Pass if the image is a mask or gradient or should not be color matched for some other reason. Otherwise, pass . ## Return Value An image provider. ## Discussion You must not modify the image until the release callback is invoked. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)