CGImageDestinationFinalize

CGImageDestination is a Core Graphics framework object in Apple's Cocoa and Cocoa Touch environments that allows developers to create image files in various formats. It acts as an intermediary between raw image data and a file on disk or in memory. The primary function of CGImageDestination is to assemble pixel data into a coherent image file, supporting a range of common image types such as JPEG, PNG, and TIFF.

To use CGImageDestination, a developer typically starts by creating a CGImageDestination object, specifying the destination URL and the desired image format (UTI - Uniform Type Identifier). Then, the pixel data, often in the form of a CGImage object, is added to the destination using the CGImageDestinationAddImage function. Additional metadata, such as image properties or metadata dictionaries, can also be incorporated at this stage. Finally, the CGImageDestinationFinalize function is called to complete the image creation process and write the data to the specified location. This object is crucial for tasks like saving edited photos, generating thumbnails, or exporting image assets within applications.