public unsafe FastBitmap Blur(double sigma, int weight)
{
Kernel kernel = Kernel.Gaussian(sigma, weight);
FastBitmap result = new FastBitmap(
this.Content.Width - kernel.Dimension + 1,
this.Content.Height - kernel.Dimension + 1);
int height = result.Content.Height;
int width = result.Content.Width;
this.PerformLockingOperation((readData, readScan0) =>
{
result.PerformLockingOperation((writeData, writeScan0) =>
{
for (int yPos = 0; yPos < height; yPos++)
{
for (int xPos = 0; xPos < width; xPos++)
{
double sumR = 0D;
double sumG = 0D;
double sumB = 0D;
byte *writingTo = PixelPointer(
writeScan0,
xPos,
yPos,
writeData.Stride,
bpp);
for (int yKernel = 0; yKernel < kernel.Dimension; yKernel++)
{
for (int xKernel = 0; xKernel < kernel.Dimension; xKernel++)
{
double scalar = kernel[xKernel, yKernel];
byte *readingFrom = PixelPointer(
readScan0,
xPos + xKernel,
yPos + yKernel,
readData.Stride,
bpp);
sumR += (*readingFrom * scalar);
sumG += (*(readingFrom + 1) * scalar);
sumB += (*(readingFrom + 2) * scalar);
}
}
*(writingTo + 0) = (byte)(sumR);
*(writingTo + 1) = (byte)(sumG);
*(writingTo + 2) = (byte)(sumB);
*(writingTo + 3) = *PixelPointer(readScan0, xPos, yPos, readData.Stride, bpp);
}
}
});
});
return(result);
}
public unsafe FastBitmap Grayscale()
{
int height = this.Content.Height;
int width = this.Content.Width;
FastBitmap result = new FastBitmap(width, height);
this.PerformLockingOperation((readData, readScan0) =>
{
result.PerformLockingOperation((writeData, writeScan0) =>
{
for (int yPos = 0; yPos < height; yPos++)
{
for (int xPos = 0; xPos < width; xPos++)
{
byte *readingFrom = PixelPointer(
readScan0,
xPos,
yPos,
readData.Stride,
bpp);
byte *writingTo = PixelPointer(
writeScan0,
xPos,
yPos,
writeData.Stride,
bpp);
byte average = (byte)((*(readingFrom) + *(readingFrom + 1) + *(readingFrom + 2)) / 3);
*writingTo = average;
*(writingTo + 1) = average;
*(writingTo + 2) = average;
*(writingTo + 3) = 255;
}
}
});
});
return(result);
}
public static void PerformLockingOperation(this FastBitmap bitmap, FastBitmap.LockingDataOperation operation)
{
FastBitmap.PerformLockingOperation(bitmap.Content, operation);
}