private void DrawMandelbrot()

in System.Numerics/SIMD/Mandelbrot/MainWindow.xaml.cs [166:224]
56 lines of code
10 McCabe index (conditional complexity)

        private void DrawMandelbrot(int cw, int ch)
        {
            double range, xc, yc;
            lock (valRWLock)
            {
                RenderRange = range = Range;
                RenderXC = xc = XC;
                RenderYC = yc = YC;
                width = cw;
                height = ch;
                bytes = new byte[width * height * 4];
            }
            lock (renderLock)
            {
                var render = FractalRenderer.SelectRender(AddPixel, CheckAbort, UseSIMD, !UseFloat, UseThreads, UseADT);
                Unsupported = render == null;
                if (render == null)
                    return;

                abort = false;
                done = false;
                Dispatcher.InvokeAsync(renderClock.Start);
                double xmin = (xc - range / 2.0).Clamp(-3.0, 1);
                double xmax = (xc + range / 2.0).Clamp(-3.0, 1);
                if (xmin > xmax)
                {
                    double t = xmin;
                    xmin = xmax;
                    xmax = t;
                }
                double ymin = (yc - range / 2.0).Clamp(-1.5f, 1.5f);
                double ymax = (yc + range / 2.0).Clamp(-1.5f, 1.5f);
                if (ymin > ymax)
                {
                    double t = ymin;
                    ymin = ymax;
                    ymax = t;
                }
                double ystep = (range / (double)ch).Clamp(0, ymax - ymin);
                double xstep = (range / (double)cw).Clamp(0, xmax - xmin);
                double step = Math.Max(ystep, xstep);
                xmin = xc - (cw * step / 2);
                xmax = xc + (cw * step / 2);
                ymin = yc - (ch * step / 2);
                ymax = yc + (ch * step / 2);

                if (xmin == xmax || ymin == ymax ||
                    xmin + xstep <= xmin || ymin + ystep <= ymin ||
                    ymax - ystep >= ymax || xmax - xstep >= xmax)
                    return;

                Stopwatch timer = new Stopwatch();
                timer.Start();
                render((float)xmin, (float)xmax, (float)ymin, (float)ymax, (float)step);
                ElapsedTime = timer.ElapsedMilliseconds;
                abort = false;
                done = true;
            }
        }