private unsafe void ApplyLine(int *grayImageData, PointF point1, PointF point2, int lineChange)
{
void Plot(int x, int y, double brightness)
{
if (y >= _panelSize)
{
return;
}
int pixelValueIndex = y * _panelSize + x;
int oldPixelValue = grayImageData[pixelValueIndex];
int newPixelValue = oldPixelValue - (int)(brightness * lineChange);
grayImageData[pixelValueIndex] = newPixelValue;
}
XiaolinWuLineAlgorithm.PlotLine(point1.X, point1.Y, point2.X, point2.Y, Plot);
}
private int[] RemoveLine(int[] grayImageData, PointF point1, PointF point2, int lineChange)
{
int[] newGrayImageData = (int[])grayImageData.Clone();
void Plot(int x, int y, double brightness)
{
if (y >= _panelSize)
{
return;
}
int pixelValueIndex = y * _panelSize + x;
int oldPixelValue = grayImageData[pixelValueIndex];
int newPixelValue = Math.Min(oldPixelValue + (int)(brightness * lineChange), 255);
newGrayImageData[pixelValueIndex] = newPixelValue;
}
XiaolinWuLineAlgorithm.PlotLine(point1.X, point1.Y, point2.X, point2.Y, Plot);
return(newGrayImageData);
}
private long CalculateLineRemovalDifference(int[] grayImageData, PointF point1, PointF point2, int lineChange, byte[] comparisonByteArray)
{
long difference = 0;
void Plot(int x, int y, double brightness)
{
if (y >= _panelSize)
{
return;
}
int pixelValueIndex = y * _panelSize + x;
int oldPixelValue = grayImageData[pixelValueIndex];
byte oldPixelValueByte = (byte)Math.Max(oldPixelValue, 0);
int newPixelValue = Math.Min(grayImageData[pixelValueIndex] + (int)(brightness * lineChange), 255);
byte newPixelValueByte =
(byte)Math.Max(newPixelValue, 0);
byte targetPixelValue = comparisonByteArray[pixelValueIndex];
int oldTargetDiff = Math.Abs(oldPixelValueByte - targetPixelValue);
int newTargetDiff = Math.Abs(newPixelValueByte - targetPixelValue);
int delta = oldTargetDiff - newTargetDiff;
if (delta < 0)
{
delta = (int)(delta * 1.25d);
}
difference += delta;
}
XiaolinWuLineAlgorithm.PlotLine(point1.X, point1.Y, point2.X, point2.Y, Plot);
return(difference);
}