# init(filename:) Creates a direct-access data provider that uses a file to supply data. ``` init?(filename: UnsafePointer) ``` ## Parameters `filename` The full or relative pathname to use for the data provider. When you supply Core Graphics data via the provider, it reads the data from the specified file. ## Return Value A new data provider or `NULL` if the file could not be opened. In Objective-C, you’re responsible for releasing this object using [`CGDataProviderRelease`](/documentation/CoreGraphics/CGDataProviderRelease). ## Discussion You use this function to create a direct-access data provider that supplies data from a file. When you supply Core Graphics with a direct-access data provider, Core Graphics obtains data from your program in a single block. --- 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)