public static void ImportConfig(string cfg_json)
{
var cfg = JsonConvert.DeserializeObject <Config>(cfg_json);
argument = cfg.argument;
inPath = cfg.inPath;
outPath = cfg.outPath;
argument.PixelType =
Type.GetType($"SixLabors.ImageSharp.PixelFormats.{cfg.argument_type}") ?? typeof(Rgb24);
}
public Image Generate <TPixel>(ImageArgument argument) where TPixel : unmanaged, IPixel <TPixel>
{
// 不支持类型
if (!CheckPixelType(typeof(TPixel)))
{
throw new NotImplementedException();
}
bool useAlpha = typeof(TPixel) == typeof(Rgba32);
var center = new Point(argument.imageSize.Width / 2, argument.imageSize.Height / 2);
var radio = center.X;
float lowThreshold = radio * (1 - _thicknessRate);
float highThreshold = radio * _thicknessRate;
void RowModifier(Span <Vector4> row, Point p)
{
for (int x = 0; x < row.Length; x++)
{
var centerDelta_X = x - center.X;
var centerDelta_Y = p.Y - center.Y;
var disToCenter = (float)Math.Sqrt(centerDelta_X * centerDelta_X + centerDelta_Y * centerDelta_Y);
if (disToCenter >= lowThreshold && disToCenter < highThreshold)
{
// some simple mathematics
float radian = GetRadianOfPoint(centerDelta_X, centerDelta_Y, disToCenter);
float r = (float)Math.Sin(radian - _startRadian) * 0.5f + 0.5f;
float g = (float)Math.Sin(radian - _startRadian + 2 * Math.PI / 3) * 0.5f + 0.5f;
float b = (float)Math.Sin(radian - _startRadian + 4 * Math.PI / 3) * 0.5f + 0.5f;
row[x] = new Vector4(r, g, b, 1);
}
}
}
if (useAlpha)
{
Image <Rgba32> image = new Image <Rgba32>(argument.imageSize.Width, argument.imageSize.Height);
image.Mutate(img => img.ProcessPixelRowsAsVector4(RowModifier));
image[center.X, center.Y] = new Rgba32(255, 255, 255, 255);
return(image);
}
else
{
Image <Rgb24> image = new Image <Rgb24>(argument.imageSize.Width, argument.imageSize.Height);
image.Mutate(img => img.ProcessPixelRowsAsVector4(RowModifier));
image[center.X, center.Y] = new Rgb24(255, 255, 255);
return(image);
}
}
