void CGContextFillPathWithLinearGradientVertical(CGContextRef context, CGPathRef pathRef, CGColorRef startColor, CGColorRef endColor)
{
	CGContextSaveGState(context);

		enum { kNumLocations = 2 };
		CGColorSpaceRef colorSpaceRef = CGColorSpaceCreateDeviceRGB();
		CGFloat locations[kNumLocations] = { 0.0f, 1.0f };

		CGRect boundingBox = CGPathGetBoundingBox(pathRef);
		CGPoint pointTop = CGPointMake(CGRectGetMidX(boundingBox), CGRectGetMinY(boundingBox));
		CGPoint pointBottom = CGPointMake(CGRectGetMidX(boundingBox), CGRectGetMaxY(boundingBox));

		CGFloat r1, g1, b1, a1, r2, g2, b2, a2;
		CGColorToRGBA(startColor, &r1, &g1, &b1, &a1);
		CGColorToRGBA(endColor, &r2, &g2, &b2, &a2);
		ZRGBA components[kNumLocations] = { { r1, g1, b1, a1 }, { r2, g2, b2, a2 } };

		CGContextAddPath(context, pathRef);
		CGContextClip(context);
		CGGradientRef gradientRef = CGGradientCreateWithColorComponents(colorSpaceRef, (CGFloat *)components, locations, kNumLocations);
		CGContextDrawLinearGradient(context, gradientRef, pointTop, pointBottom, kCGGradientDrawsBeforeStartLocation);
		CGGradientRelease(gradientRef);
		CGColorSpaceRelease(colorSpaceRef);

	CGContextRestoreGState(context);
}