func NSUIGraphicsBeginImageContextWithOptions()

in Source/Charts/Utils/Platform+Graphics.swift [111:135]

• 20 lines of code
• 5 McCabe index (conditional complexity)

func NSUIGraphicsBeginImageContextWithOptions(_ size: CGSize, _ opaque: Bool, _ scale: CGFloat)
{
    var scale = scale
    if scale == 0.0
    {
        scale = NSScreen.main?.backingScaleFactor ?? 1.0
    }

    let width = Int(size.width * scale)
    let height = Int(size.height * scale)

    if width > 0 && height > 0
    {
        imageContextStack.append(scale)

        let colorSpace = CGColorSpaceCreateDeviceRGB()

        guard let ctx = CGContext(data: nil, width: width, height: height, bitsPerComponent: 8, bytesPerRow: 4*width, space: colorSpace, bitmapInfo: (opaque ?  CGImageAlphaInfo.noneSkipFirst.rawValue : CGImageAlphaInfo.premultipliedFirst.rawValue))
            else { return }

        ctx.concatenate(CGAffineTransform(a: 1, b: 0, c: 0, d: -1, tx: 0, ty: CGFloat(height)))
        ctx.scaleBy(x: scale, y: scale)
        NSUIGraphicsPushContext(ctx)
    }
}