/// <inheritdoc/>
protected override void OnApply(ImageBase <TPixel> source, Rectangle sourceRectangle)
{
int startY = sourceRectangle.Y;
int endY = sourceRectangle.Bottom;
int startX = sourceRectangle.X;
int endX = sourceRectangle.Right;
int radius = this.BrushSize >> 1;
int levels = this.Levels;
// Align start/end positions.
int minX = Math.Max(0, startX);
int maxX = Math.Min(source.Width, endX);
int minY = Math.Max(0, startY);
int maxY = Math.Min(source.Height, endY);
// Reset offset if necessary.
if (minX > 0)
{
startX = 0;
}
using (var targetPixels = new PixelAccessor <TPixel>(source.Width, source.Height))
{
source.CopyTo(targetPixels);
Parallel.For(
minY,
maxY,
this.ParallelOptions,
y =>
{
Span <TPixel> sourceRow = source.GetRowSpan(y);
Span <TPixel> targetRow = targetPixels.GetRowSpan(y);
for (int x = startX; x < endX; x++)
{
int maxIntensity = 0;
int maxIndex = 0;
int[] intensityBin = new int[levels];
float[] redBin = new float[levels];
float[] blueBin = new float[levels];
float[] greenBin = new float[levels];
for (int fy = 0; fy <= radius; fy++)
{
int fyr = fy - radius;
int offsetY = y + fyr;
offsetY = offsetY.Clamp(0, maxY);
Span <TPixel> sourceOffsetRow = source.GetRowSpan(offsetY);
for (int fx = 0; fx <= radius; fx++)
{
int fxr = fx - radius;
int offsetX = x + fxr;
offsetX = offsetX.Clamp(0, maxX);
var vector = sourceOffsetRow[offsetX].ToVector4();
float sourceRed = vector.X;
float sourceBlue = vector.Z;
float sourceGreen = vector.Y;
int currentIntensity = (int)MathF.Round((sourceBlue + sourceGreen + sourceRed) / 3F * (levels - 1));
intensityBin[currentIntensity] += 1;
blueBin[currentIntensity] += sourceBlue;
greenBin[currentIntensity] += sourceGreen;
redBin[currentIntensity] += sourceRed;
if (intensityBin[currentIntensity] > maxIntensity)
{
maxIntensity = intensityBin[currentIntensity];
maxIndex = currentIntensity;
}
}
float red = MathF.Abs(redBin[maxIndex] / maxIntensity);
float green = MathF.Abs(greenBin[maxIndex] / maxIntensity);
float blue = MathF.Abs(blueBin[maxIndex] / maxIntensity);
ref TPixel pixel = ref targetRow[x];
pixel.PackFromVector4(new Vector4(red, green, blue, sourceRow[x].ToVector4().W));
}
}
});
source.SwapPixelsBuffers(targetPixels);
}
}
/// <inheritdoc/>
protected override void OnApply(ImageBase <TPixel> source, Rectangle sourceRectangle)
{
int kernelYHeight = this.KernelY.Height;
int kernelYWidth = this.KernelY.Width;
int kernelXHeight = this.KernelX.Height;
int kernelXWidth = this.KernelX.Width;
int radiusY = kernelYHeight >> 1;
int radiusX = kernelXWidth >> 1;
int startY = sourceRectangle.Y;
int endY = sourceRectangle.Bottom;
int startX = sourceRectangle.X;
int endX = sourceRectangle.Right;
int maxY = endY - 1;
int maxX = endX - 1;
using (var targetPixels = new PixelAccessor <TPixel>(source.Width, source.Height))
{
source.CopyTo(targetPixels);
Parallel.For(
startY,
endY,
this.ParallelOptions,
y =>
{
Span <TPixel> sourceRow = source.GetRowSpan(y);
Span <TPixel> targetRow = targetPixels.GetRowSpan(y);
for (int x = startX; x < endX; x++)
{
float rX = 0;
float gX = 0;
float bX = 0;
float rY = 0;
float gY = 0;
float bY = 0;
// Apply each matrix multiplier to the color components for each pixel.
for (int fy = 0; fy < kernelYHeight; fy++)
{
int fyr = fy - radiusY;
int offsetY = y + fyr;
offsetY = offsetY.Clamp(0, maxY);
Span <TPixel> sourceOffsetRow = source.GetRowSpan(offsetY);
for (int fx = 0; fx < kernelXWidth; fx++)
{
int fxr = fx - radiusX;
int offsetX = x + fxr;
offsetX = offsetX.Clamp(0, maxX);
var currentColor = sourceOffsetRow[offsetX].ToVector4();
if (fy < kernelXHeight)
{
Vector4 kx = this.KernelX[fy, fx] * currentColor;
rX += kx.X;
gX += kx.Y;
bX += kx.Z;
}
if (fx < kernelYWidth)
{
Vector4 ky = this.KernelY[fy, fx] * currentColor;
rY += ky.X;
gY += ky.Y;
bY += ky.Z;
}
}
}
float red = MathF.Sqrt((rX * rX) + (rY * rY));
float green = MathF.Sqrt((gX * gX) + (gY * gY));
float blue = MathF.Sqrt((bX * bX) + (bY * bY));
ref TPixel pixel = ref targetRow[x];
pixel.PackFromVector4(new Vector4(red, green, blue, sourceRow[x].ToVector4().W));
}
});
source.SwapPixelsBuffers(targetPixels);
}
}
/// <inheritdoc/>
protected override void OnApply(ImageBase<TPixel> source, Rectangle sourceRectangle)
{
int kernelLength = this.KernelXY.Height;
int radius = kernelLength >> 1;
int startY = sourceRectangle.Y;
int endY = sourceRectangle.Bottom;
int startX = sourceRectangle.X;
int endX = sourceRectangle.Right;
int maxY = endY - 1;
int maxX = endX - 1;
using (var targetPixels = new PixelAccessor<TPixel>(source.Width, source.Height))
{
source.CopyTo(targetPixels);
Parallel.For(
startY,
endY,
this.ParallelOptions,
y =>
{
Span<TPixel> sourceRow = source.GetRowSpan(y);
Span<TPixel> targetRow = targetPixels.GetRowSpan(y);
for (int x = startX; x < endX; x++)
{
float red = 0;
float green = 0;
float blue = 0;
// Apply each matrix multiplier to the color components for each pixel.
for (int fy = 0; fy < kernelLength; fy++)
{
int fyr = fy - radius;
int offsetY = y + fyr;
offsetY = offsetY.Clamp(0, maxY);
Span<TPixel> sourceOffsetRow = source.GetRowSpan(offsetY);
for (int fx = 0; fx < kernelLength; fx++)
{
int fxr = fx - radius;
int offsetX = x + fxr;
offsetX = offsetX.Clamp(0, maxX);
var currentColor = sourceOffsetRow[offsetX].ToVector4();
currentColor *= this.KernelXY[fy, fx];
red += currentColor.X;
green += currentColor.Y;
blue += currentColor.Z;
}
}
ref TPixel pixel = ref targetRow[x];
pixel.PackFromVector4(new Vector4(red, green, blue, sourceRow[x].ToVector4().W));
}
});
source.SwapPixelsBuffers(targetPixels);
}
}
