CGContextDrawPath

CGContextDrawPath is a function in the Core Graphics framework of Apple's operating systems, used to render a defined path onto a graphics context. This function is fundamental for drawing vector-based graphics, such as lines, curves, and shapes.

Before calling CGContextDrawPath, a path is typically constructed using a series of path-building methods. These methods add segments like lines, curves, and move-to points to an in-progress path object associated with the CGContext. Once the path is complete, CGContextDrawPath takes this constructed path and applies rendering operations to it.

The rendering can involve stroking, which outlines the path with a specified color and line width, or filling, which colors the area enclosed by the path. A common usage pattern involves setting the current drawing color, line width, and line join/cap styles on the CGContext before invoking CGContextDrawPath with the kCGPathStroke or kCGPathFill fill rule. Multiple calls with different rendering modes can be made on the same path. The function is part of the lower-level graphics API, offering direct control over drawing operations.