[wyvwyv]

I'll just post this in case it's useful for someone else, but this is the code I wrote to add the missing CGContextAddRoundedRect function:

Code:

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void CGContextAddRoundedRect (CGContextRef c, CGRect rect, int corner_radius) {
	int x_left = rect.origin.x;
	int x_left_center = rect.origin.x + corner_radius;
	int x_right_center = rect.origin.x + rect.size.width - corner_radius;
	int x_right = rect.origin.x + rect.size.width;
	int y_top = rect.origin.y;
	int y_top_center = rect.origin.y + corner_radius;
	int y_bottom_center = rect.origin.y + rect.size.height - corner_radius;
	int y_bottom = rect.origin.y + rect.size.height;
	
	/* Begin! */
	CGContextBeginPath(c);
	CGContextMoveToPoint(c, x_left, y_top_center);
	
	/* First corner */
	CGContextAddArcToPoint(c, x_left, y_top, x_left_center, y_top, corner_radius);
	CGContextAddLineToPoint(c, x_right_center, y_top);
	
	/* Second corner */
	CGContextAddArcToPoint(c, x_right, y_top, x_right, y_top_center, corner_radius);
	CGContextAddLineToPoint(c, x_right, y_bottom_center);
	
	/* Third corner */
	CGContextAddArcToPoint(c, x_right, y_bottom, x_right_center, y_bottom, corner_radius);
	CGContextAddLineToPoint(c, x_left_center, y_bottom);
	
	/* Fourth corner */
	CGContextAddArcToPoint(c, x_left, y_bottom, x_left, y_bottom_center, corner_radius);
	CGContextAddLineToPoint(c, x_left, y_top_center);
	
	/* Done */
	CGContextClosePath(c);
	
}

My version has the Begin/Close path built in, for my own reasons. You can eliminate them if you want more control over the paths.

Here is how you would use it:

Code:

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CGContextSetRGBFillColor(c, 0, 1, 0, 1);
CGContextAddRoundedRect(c, CGRectMake(10,200,50,50), 10);
CGContextFillPath(c);
	
CGContextSetLineWidth(c, 3);
CGContextSetRGBStrokeColor(c, 0, 0, 0, 1);
CGContextAddRoundedRect(c, CGRectMake(10,200,50,50), 10);
CGContextStrokePath(c);