public override void Apply(Image <Rgba32> bitmap)
{
// Temporary buffer so we don't mess up blending.
using (var buffer = new Image <Rgba32>(Configuration.Default, bitmap.Width, bitmap.Height, new Rgba32(0, 0, 0, 0)))
{
if (Masked)
{
GenPointsMasked(buffer);
}
else
{
GenPoints(buffer);
}
var srcSpan = buffer.GetPixelSpan();
var dstSpan = bitmap.GetPixelSpan();
var width = bitmap.Width;
var height = bitmap.Height;
for (var y = 0; y < height; y++)
{
for (var x = 0; x < width; x++)
{
var i = y * width + x;
var dstColor = dstSpan[i].ConvertImgSharp();
var srcColor = srcSpan[i].ConvertImgSharp();
dstSpan[i] = Color.Blend(dstColor, srcColor, DstFactor, SrcFactor).ConvertImgSharp();
}
}
}
}
public override void Apply(Image <Rgba32> bitmap)
{
var noise = new NoiseGenerator(NoiseType);
noise.SetSeed(Seed);
noise.SetFrequency(Frequency);
noise.SetPersistence(Persistence);
noise.SetLacunarity(Lacunarity);
noise.SetOctaves(Octaves);
noise.SetPeriodX(bitmap.Width);
noise.SetPeriodY(bitmap.Height);
var threshVal = 1 / (1 - Threshold);
var powFactor = 1 / Power;
var span = bitmap.GetPixelSpan();
for (var y = 0; y < bitmap.Height; y++)
{
for (var x = 0; x < bitmap.Width; x++)
{
// Do noise calculations.
var noiseVal = MathF.Min(1, MathF.Max(0, (noise.GetNoiseTiled(x, y) + 1) / 2));
// Threshold
noiseVal = MathF.Max(0, noiseVal - Threshold);
noiseVal *= threshVal;
noiseVal = (float)MathF.Pow(noiseVal, powFactor);
// Get colors based on noise values.
var srcColor = Color.InterpolateBetween(OuterColor, InnerColor, noiseVal)
.WithAlpha(noiseVal);
// Apply blending factors & write back.
var i = y * bitmap.Width + x;
var dstColor = span[i].ConvertImgSharp();
span[i] = Color.Blend(dstColor, srcColor, DstFactor, SrcFactor).ConvertImgSharp();
}
}
}