public static Image <Rgba32> CloneWithLookupTable(this Image <HalfSingle> source, Rgba32[] gradient)
{
if (gradient == null)
{
gradient = new Rgba32[] { Rgba32.Black, Rgba32.White }
}
;
var vgradient = gradient.Select(item => item.ToVector4()).ToArray();
var target = new Image <Rgba32>(source.Width, source.Height);
for (int y = 0; y < target.Height; ++y)
{
for (int x = 0; x < target.Width; ++x)
{
var z = source[x, y].ToSingle().Clamp(0, 1);
z *= (vgradient.Length - 1);
var lowerIdx = (int)(z); if (lowerIdx >= vgradient.Length)
{
lowerIdx = vgradient.Length - 1;
}
var upperIdx = (lowerIdx + 1); if (upperIdx >= vgradient.Length)
{
upperIdx = vgradient.Length - 1;
}
z -= (int)z;
var c = System.Numerics.Vector4.Lerp(vgradient[lowerIdx], vgradient[upperIdx], z);
target[x, y] = new Rgba32(c);
}
}
return(target);
}
}
private static async Task Test()
{
using (var pf = new Pixelflut(_hostname, _ports))
{
// connect and get resolution
Console.WriteLine($"Connecting ...");
await pf.Connect();
Console.WriteLine($"Connected, retrieving res ...");
var res = await pf.GetResolutionAsync();
Console.WriteLine($"Screen res: {res.X}x{res.Y}");
var imageX = res.X - _leftMargin - _rightMargin;
var imageY = res.Y - _topMargin - _bottomMargin;
// decode image and resize to screen res
Rgba32[] pixels;
using (var image = Image.Load(_file))
{
pixels = new Rgba32[imageX * imageY];
Console.WriteLine($"Img size: {image.Width}x{image.Height}");
// https://stackoverflow.com/questions/1940581/c-sharp-image-resizing-to-different-size-while-preserving-aspect-ratio
var ratioX = imageX / (double)image.Width;
var ratioY = imageY / (double)image.Height;
var ratio = ratioX < ratioY ? ratioX : ratioY;
var newHeight = Convert.ToInt32(image.Height * ratio);
var newWidth = Convert.ToInt32(image.Width * ratio);
Console.WriteLine($"Resizing image to: {newWidth}x{newHeight}");
image.Mutate(x => x.Resize(new ResizeOptions {
Size = new Size(newWidth, newHeight)
}));
Console.WriteLine($"Image resized!");
image.Mutate(x => x.Pad(imageX, imageY));
Console.WriteLine($"Image padded!");
var pixelBytes = image.SavePixelData();
Console.WriteLine($"Saved pixel data!");
for (var i = 0; i < pixelBytes.Length; i += 4)
{
pixels[i / 4] = new Rgba32(pixelBytes[i], pixelBytes[i + 1], pixelBytes[i + 2], pixelBytes[i + 3]);
}
}
var hexPixels = pixels.Select(x => x.ToHex().Substring(0, 6)).ToArray();
Console.WriteLine("Starting threads");
for (var i = 0; i < _threads; i++)
{
var t = new Thread(async() =>
{
using (var tpf = new Pixelflut(_hostname, _ports))
{
while (true)
{
try
{
await tpf.Connect();
tpf.LoadImage(hexPixels, imageX, _bulkPixels, _leftMargin, _topMargin);
while (true)
{
await tpf.SendImage();
//Console.Out.Write('*');
}
}
catch (Exception ex)
{
// thread crash
lock (Console.Out)
{
Console.Out.WriteLine(ex);
}
}
}
}
});
t.Start();
}
}
}
