A structure that holds a version and two callback functions for drawing a custom pattern.
Mac Catalyst 13.0+Beta
You supply a CGPatternCallbacks structure to the function CGPatternCreate to create a data provider for direct access. The functions specified by the CGPatternCallbacks structure are responsible for drawing the pattern and for handling the pattern’s memory management.
The version of the structure passed in as a parameter
to the CGPatternCreate. For
this version of the structure, you should set this value to zero.
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