CGImageSourceGetCount

CGImageSourceGetCount is a function from the Quartz Framework in macOS, iOS, and watchOS that returns the number of images in a specific image source.

The image source can be an image file, a URL, or other type of image data. This function is used to determine the number of images in the source before attempting to access them. It is a fundamental step in working with image data, allowing developers to know how many images are available.

The function takes one argument, an image source. This argument can be an image file path, URL, or any other type of image data that can be provided to the CGImageSourceCreateWithDataProvider function. The function returns the count of images in the source as an unsigned integer.

CGImageSourceGetCount is commonly used in image processing and manipulation tasks. It allows developers to loop through the images in the source, accessing each one by index. This is particularly useful when working with multi-image file formats, such as compressed image containers.

CGImageSourceGetCount is part of the Quartz Core framework in macOS, iOS, and watchOS. The function is designed to be efficient, returning the count quickly even for large image sources. However, it is generally used in combination with other Quartz Core functions to manipulate image data, such as CGImageSourceCreateImageAtIndex.

Developers who work with images in their applications may find CGImageSourceGetCount a useful function to know. It simplifies the process of accessing and manipulating image data, helping to streamline image processing tasks.