static void DrawMandelbrotSet(int width, int height, Stream stream, MandelbrotScale scale)
{
if (!IsQuiet)
{
Console.WriteLine($"Thread {Thread.CurrentThread.ManagedThreadId} started drawing Mandelbrot. \n");
}
using (var image = new Image <Rgba32>(width, height))
{
for (int i = 0; i < width; i++)
{
MandelbrotInnerLoop(i, width, height, image, scale);
}
image.SaveAsPng(stream);
};
if (!IsQuiet)
{
Console.WriteLine($"Thread {Thread.CurrentThread.ManagedThreadId} finished drawing Mandelbrot. \n");
}
}
static void MandelbrotInnerLoop(int i, int width, int height, Image <Rgba32> image, MandelbrotScale scale)
{
for (int j = 0; j < height; j++)
{
var cx = ((double)i).Map(0, width, scale.Lx, scale.Hx);
var cy = ((double)j).Map(0, height, scale.Ly, scale.Hy);
var c = new Complex(cx, cy);
var iterations = CalculatePixel(c);
if (iterations == maxIterations)
{
image[i, j] = new Rgba32(0, 0, 0);
}
else
{
var factor = iterations / (double)maxIterations;
var intensity = (byte)Math.Round(255 * factor * 10);
image[i, j] = new Rgba32(intensity, intensity, intensity);
}
}
}
static void DrawMandelbrotSetParallel2(int width, int height, Stream stream, int taskCnt, int chunkSize, MandelbrotScale scale)
{
using (var image = new Image <Rgba32>(width, height))
{
Parallel.ForEach(Partitioner.Create(0, width, chunkSize),
new ParallelOptions()
{
MaxDegreeOfParallelism = taskCnt
},
range =>
{
for (int i = range.Item1; i < range.Item2; i++)
{
MandelbrotInnerLoop(i, width, height, image, scale);
}
});
image.SaveAsPng(stream);
};
}
static void DrawMandelbrotSetParallel(int width, int height, Stream stream, int taskCnt, int chunkSize, MandelbrotScale scale)
{
if (!IsQuiet)
{
Console.WriteLine($"Thread {Thread.CurrentThread.ManagedThreadId} started drawing Mandelbrot. \n");
}
using (var image = new Image <Rgba32>(width, height))
{
CustomChunkPartitionParallelFor(0, width, (i) =>
{
MandelbrotInnerLoop(i, width, height, image, scale);
}, chunkSize, taskCnt);
image.SaveAsPng(stream);
};
if (!IsQuiet)
{
Console.WriteLine($"Thread {Thread.CurrentThread.ManagedThreadId} finished drawing Mandelbrot. \n");
}
}
static void DrawMandelbrotSetParallelNaive(int width, int height, Stream stream, int taskCnt, MandelbrotScale scale)
{
using (var image = new Image <Rgba32>(width, height))
{
CustomPartitionParallelFor(0, width, (i) =>
{
MandelbrotInnerLoop(i, width, height, image, scale);
}, taskCnt);
image.SaveAsPng(stream);
};
}
