/// <inheritdoc/>
protected override void OnFrameApply(ImageFrame <TPixel> source)
{
int brushSize = this.definition.BrushSize;
if (brushSize <= 0 || brushSize > source.Height || brushSize > source.Width)
{
throw new ArgumentOutOfRangeException(nameof(brushSize));
}
int startY = this.SourceRectangle.Y;
int endY = this.SourceRectangle.Bottom;
int startX = this.SourceRectangle.X;
int endX = this.SourceRectangle.Right;
int maxY = endY - 1;
int maxX = endX - 1;
int radius = brushSize >> 1;
int levels = this.definition.Levels;
int rowWidth = source.Width;
int rectangleWidth = this.SourceRectangle.Width;
Configuration configuration = this.Configuration;
using Buffer2D <TPixel> targetPixels = this.Configuration.MemoryAllocator.Allocate2D <TPixel>(source.Size());
source.CopyTo(targetPixels);
var workingRect = Rectangle.FromLTRB(startX, startY, endX, endY);
ParallelHelper.IterateRows(
workingRect,
this.Configuration,
(rows) =>
{
/* Allocate the two temporary Vector4 buffers, one for the source row and one for the target row.
* The ParallelHelper.IterateRowsWithTempBuffers overload is not used in this case because
* the two allocated buffers have a length equal to the width of the source image,
* and not just equal to the width of the target rectangle to process.
* Furthermore, there are two buffers being allocated in this case, so using that overload would
* have still required the explicit allocation of the secondary buffer.
* Similarly, one temporary float buffer is also allocated from the pool, and that is used
* to create the target bins for all the color channels being processed.
* This buffer is only rented once outside of the main processing loop, and its contents
* are cleared for each loop iteration, to avoid the repeated allocation for each processed pixel. */
using (IMemoryOwner <Vector4> sourceRowBuffer = configuration.MemoryAllocator.Allocate <Vector4>(rowWidth))
using (IMemoryOwner <Vector4> targetRowBuffer = configuration.MemoryAllocator.Allocate <Vector4>(rowWidth))
using (IMemoryOwner <float> bins = configuration.MemoryAllocator.Allocate <float>(levels * 4))
{
Span <Vector4> sourceRowVector4Span = sourceRowBuffer.Memory.Span;
Span <Vector4> sourceRowAreaVector4Span = sourceRowVector4Span.Slice(startX, rectangleWidth);
Span <Vector4> targetRowVector4Span = targetRowBuffer.Memory.Span;
Span <Vector4> targetRowAreaVector4Span = targetRowVector4Span.Slice(startX, rectangleWidth);
ref float binsRef = ref bins.GetReference();
ref int intensityBinRef = ref Unsafe.As <float, int>(ref binsRef);
ref float redBinRef = ref Unsafe.Add(ref binsRef, levels);
/// <inheritdoc/>
protected override void OnFrameApply(ImageFrame <TPixel> source, Rectangle sourceRectangle, Configuration configuration)
{
using (Buffer2D <TPixel> firstPassPixels = configuration.MemoryAllocator.Allocate2D <TPixel>(source.Size()))
{
source.CopyTo(firstPassPixels);
var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
this.ApplyConvolution(firstPassPixels, source.PixelBuffer, interest, this.KernelX, configuration);
this.ApplyConvolution(source.PixelBuffer, firstPassPixels, interest, this.KernelY, configuration);
}
}
/// <inheritdoc/>
protected override void OnFrameApply(
ImageFrame <TPixel> source,
Rectangle sourceRectangle,
Configuration configuration)
{
DenseMatrix <float> matrixY = this.KernelY;
DenseMatrix <float> matrixX = this.KernelX;
var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
int startY = interest.Y;
int endY = interest.Bottom;
int startX = interest.X;
int endX = interest.Right;
int maxY = endY - 1;
int maxX = endX - 1;
using (Buffer2D <TPixel> targetPixels = configuration.MemoryAllocator.Allocate2D <TPixel>(source.Width, source.Height))
{
source.CopyTo(targetPixels);
var workingRectangle = Rectangle.FromLTRB(startX, startY, endX, endY);
int width = workingRectangle.Width;
ParallelHelper.IterateRowsWithTempBuffer <Vector4>(
workingRectangle,
configuration,
(rows, vectorBuffer) =>
{
Span <Vector4> vectorSpan = vectorBuffer.Span;
int length = vectorSpan.Length;
for (int y = rows.Min; y < rows.Max; y++)
{
Span <TPixel> targetRowSpan = targetPixels.GetRowSpan(y).Slice(startX);
PixelOperations <TPixel> .Instance.ToVector4(targetRowSpan, vectorSpan, length);
for (int x = 0; x < width; x++)
{
DenseMatrixUtils.Convolve2D(in matrixY, in matrixX, source.PixelBuffer, vectorSpan, y, x, maxY, maxX, startX);
}
PixelOperations <TPixel> .Instance.PackFromVector4(vectorSpan, targetRowSpan, length);
}
/// <inheritdoc/>
protected override void OnFrameApply(ImageFrame <TPixel> source)
{
int brushSize = this.definition.BrushSize;
if (brushSize <= 0 || brushSize > source.Height || brushSize > source.Width)
{
throw new ArgumentOutOfRangeException(nameof(brushSize));
}
using Buffer2D <TPixel> targetPixels = this.Configuration.MemoryAllocator.Allocate2D <TPixel>(source.Size());
source.CopyTo(targetPixels);
var operation = new RowIntervalOperation(this.SourceRectangle, targetPixels, source, this.Configuration, brushSize >> 1, this.definition.Levels);
ParallelRowIterator.IterateRowIntervals(
this.Configuration,
this.SourceRectangle,
in operation);
Buffer2D <TPixel> .SwapOrCopyContent(source.PixelBuffer, targetPixels);
}
/// <inheritdoc/>
protected override void OnFrameApply(ImageFrame <TPixel> source, Rectangle sourceRectangle, Configuration configuration)
{
if (this.BrushSize <= 0 || this.BrushSize > source.Height || this.BrushSize > source.Width)
{
throw new ArgumentOutOfRangeException(nameof(this.BrushSize));
}
int startY = sourceRectangle.Y;
int endY = sourceRectangle.Bottom;
int startX = sourceRectangle.X;
int endX = sourceRectangle.Right;
int maxY = endY - 1;
int maxX = endX - 1;
int radius = this.BrushSize >> 1;
int levels = this.Levels;
using (Buffer2D <TPixel> targetPixels = configuration.MemoryAllocator.Allocate2D <TPixel>(source.Size()))
{
source.CopyTo(targetPixels);
Parallel.For(
startY,
maxY,
configuration.ParallelOptions,
y =>
{
Span <TPixel> sourceRow = source.GetPixelRowSpan(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.GetPixelRowSpan(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]++;
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));
}
}
});
Buffer2D <TPixel> .SwapOrCopyContent(source.PixelBuffer, targetPixels);
}
}
/// <inheritdoc/>
protected override void OnFrameApply(ImageFrame <TPixel> source, Rectangle sourceRectangle, Configuration configuration)
{
int kernelLength = this.KernelXY.Rows;
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 (Buffer2D <TPixel> targetPixels = configuration.MemoryAllocator.Allocate2D <TPixel>(source.Size()))
{
source.CopyTo(targetPixels);
Parallel.For(
startY,
endY,
configuration.ParallelOptions,
y =>
{
Span <TPixel> sourceRow = source.GetPixelRowSpan(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.GetPixelRowSpan(offsetY);
for (int fx = 0; fx < kernelLength; fx++)
{
int fxr = fx - radius;
int offsetX = x + fxr;
offsetX = offsetX.Clamp(0, maxX);
Vector4 currentColor = sourceOffsetRow[offsetX].ToVector4().Premultiply();
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).UnPremultiply());
}
});
Buffer2D <TPixel> .SwapOrCopyContent(source.PixelBuffer, targetPixels);
}
}
/// <inheritdoc/>
protected override void OnApply(ImageFrame <TPixel> source, Rectangle sourceRectangle, Configuration configuration)
{
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,
configuration.ParallelOptions,
y =>
{
Span <TPixel> sourceRow = source.GetPixelRowSpan(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.GetPixelRowSpan(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 OnFrameApply(
ImageFrame <TPixel> source,
Rectangle sourceRectangle,
Configuration configuration)
{
int kernelYHeight = this.KernelY.Rows;
int kernelYWidth = this.KernelY.Columns;
int kernelXHeight = this.KernelX.Rows;
int kernelXWidth = this.KernelX.Columns;
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 (Buffer2D <TPixel> targetPixels =
configuration.MemoryAllocator.Allocate2D <TPixel>(source.Width, source.Height))
{
source.CopyTo(targetPixels);
var workingRectangle = Rectangle.FromLTRB(startX, startY, endX, endY);
ParallelHelper.IterateRows(
workingRectangle,
configuration,
rows =>
{
for (int y = rows.Min; y < rows.Max; y++)
{
Span <TPixel> sourceRow = source.GetPixelRowSpan(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.GetPixelRowSpan(offsetY);
for (int fx = 0; fx < kernelXWidth; fx++)
{
int fxr = fx - radiusX;
int offsetX = x + fxr;
offsetX = offsetX.Clamp(0, maxX);
Vector4 currentColor = sourceOffsetRow[offsetX].ToVector4().Premultiply();
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).UnPremultiply());
}
}
});
Buffer2D <TPixel> .SwapOrCopyContent(source.PixelBuffer, targetPixels);
}
}
