# CGPDFOperatorTable A set of callback functions for operators used when scanning content in a PDF document. ## Discussion You pass an operator table and a PDF content stream to a CGPDFScanner object. When the scanner parses a PDF operator, Core Graphics invokes your callback for that operator. See also [CGPDFScanner](/documentation/CoreGraphics/cgpdfscanner) and [CGPDFContentStream](/documentation/CoreGraphics/cgpdfcontentstream). > Note: > This object is not derived from CFType and therefore you can’t use the Core Foundation base functions on it, such as and . In Objective-C, handle memory management with ``doc://com.apple.coregraphics/documentation/CoreGraphics/CGPDFOperatorTableRetain(_:)`` and ``doc://com.apple.coregraphics/documentation/CoreGraphics/CGPDFOperatorTableRelease(_:)``. For more about PDF operators, see the latest version of *PDF Reference*, Adobe Systems Incorporated. ## Topics ### Creating a PDF Operator Table [`func CGPDFOperatorTableCreate() -> CGPDFOperatorTableRef?`](/documentation/CoreGraphics/CGPDFOperatorTableCreate()) Creates an empty PDF operator table. ### Setting Callback Functions [`func CGPDFOperatorTableSetCallback(CGPDFOperatorTableRef, UnsafePointer, CGPDFOperatorCallback)`](/documentation/CoreGraphics/CGPDFOperatorTableSetCallback(_:_:_:)) Sets a callback function for a PDF operator. ### Retaining and Releasing a PDF Operator Table [`func CGPDFOperatorTableRetain(CGPDFOperatorTableRef) -> CGPDFOperatorTableRef`](/documentation/CoreGraphics/CGPDFOperatorTableRetain(_:)) Increments the retain count of a CGPDFOperatorTable object. [`func CGPDFOperatorTableRelease(CGPDFOperatorTableRef)`](/documentation/CoreGraphics/CGPDFOperatorTableRelease(_:)) Decrements the retain count of a CGPDFOperatorTable object. ### Callbacks [`typealias CGPDFOperatorCallback`](/documentation/CoreGraphics/CGPDFOperatorCallback) Performs custom processing for PDF operators. ### Data Types [`typealias CGPDFOperatorTableRef`](/documentation/CoreGraphics/CGPDFOperatorTableRef) A type that stores callback functions for PDF operators. --- 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)