kCGPathStroke

kCGPathStroke is a constant used within the Core Graphics framework in Apple's operating systems, specifically when working with Quartz drawing operations. It represents an action that modifies a graphics path by outlining its shape. When you encounter kCGPathStroke, it signifies that the path itself, rather than its enclosed area, is to be rendered. This is typically done using a stroke color, stroke width, and potentially other line style attributes like line join and line cap.

In practice, kCGPathStroke is often used in conjunction with functions that perform drawing operations on a CGPathRef object. For example, a function might take a path and a drawing mode, and if kCGPathStroke is specified as the mode, the framework will draw the outline of the path. This is distinct from kCGPathFill, which would fill the interior of the path with a color. Developers use kCGPathStroke to create borders, emphasize lines, or draw the visible edges of shapes without filling their interiors. Understanding kCGPathStroke is fundamental for anyone performing custom drawing and graphics manipulation using Core Graphics in macOS, iOS, tvOS, and watchOS.