private void MonohromeFilter(Bitmap source, Bitmap destination, Color firstColor, Color secondColor, int coefficient)
{
var initData = source.LockBits(new Rectangle(0, 0, source.Width, source.Height), ImageLockMode.ReadOnly, source.PixelFormat);
var destData = destination.LockBits(new Rectangle(0, 0, destination.Width, destination.Height), ImageLockMode.WriteOnly, source.PixelFormat);
int byteLength = 4;
if (source.PixelFormat.ToString().Contains("24"))
{
byteLength = 3;
}
unsafe
{
byte *sourcePtr = (byte *)initData.Scan0.ToPointer();
byte *destPtr = (byte *)destData.Scan0.ToPointer();
for (int i = 0; i < initData.Stride; i += byteLength)
{
for (int j = 0; j < source.Height; j++)
{
var pixel = PixelOperations.GetPixelUnsafe(sourcePtr, initData.Stride, i, j, byteLength);
pixel = GetMonohromePixel(pixel, byteLength, coefficient);
PixelOperations.SetPixelUnsafe(destPtr, pixel, initData.Stride, i, j, byteLength);
}
}
}
source.UnlockBits(initData);
destination.UnlockBits(destData);
}
private Bitmap RotateImage(Bitmap source, double angle)
{
double radAngle = angle * Math.PI / 180;
var cos = Math.Cos(radAngle);
var sin = Math.Sin(radAngle);
var widthAndHeight = CalculateNewBoundaries(bitmap.Width, bitmap.Height, radAngle);
int newWidth = widthAndHeight.width;
int newHeight = widthAndHeight.height;
Bitmap destination = new Bitmap((int)newWidth, (int)newHeight);
var SrcData = source.LockBits(new Rectangle(0, 0, source.Width, source.Height), ImageLockMode.ReadOnly, source.PixelFormat);
var DestData = destination.LockBits(new Rectangle(0, 0, destination.Width, destination.Height), ImageLockMode.WriteOnly, source.PixelFormat);
int bytelength = 4;
if (source.PixelFormat.ToString().Contains("24"))
{
bytelength = 3;
}
int x0 = (int)(newWidth / 2.0);
int y0 = (int)(newHeight / 2.0);
unsafe
{
byte *SrcPtr = (byte *)SrcData.Scan0.ToPointer();
byte *DestPtr = (byte *)DestData.Scan0.ToPointer();
var offset = GetOffsets(source.Width, source.Height, cos, sin, x0, y0, angle);
for (double x = 0; x < source.Width; x += 1)
{
for (int y = 0; y < source.Height; y++)
{
var X = CalculateNewX((int)x, y, cos, sin, x0, y0);
var Y = CalculateNewY((int)x, y, cos, sin, x0, y0);
X += offset.xOffset;
Y += offset.yOffset;
if (Y >= 0 && Y < newHeight && X >= 0 && X < newWidth)
{
var pixel = PixelOperations.GetPixelUnsafe(SrcPtr, SrcData.Stride, (int)Math.Round(x * 4), y, bytelength);
PixelOperations.SetPixelUnsafe(DestPtr, pixel, DestData.Stride, X * 4, Y, bytelength);
PixelOperations.SetPixelUnsafe(DestPtr, pixel, DestData.Stride, (X + 1) * 4, Y, bytelength);
}
}
}
}
source.UnlockBits(SrcData);
destination.UnlockBits(DestData);
return(destination);
}
private void ZoomPicture(Bitmap source, Bitmap destination, double xZoom, double yZoom)
{
var initData = source.LockBits(new Rectangle(0, 0, source.Width, source.Height), ImageLockMode.ReadOnly, source.PixelFormat);
var destData = destination.LockBits(new Rectangle(0, 0, destination.Width, destination.Height), ImageLockMode.WriteOnly, source.PixelFormat);
int byteLength = 4;
if (source.PixelFormat.ToString().Contains("24"))
{
byteLength = 3;
}
else if (source.PixelFormat.ToString().Contains("16"))
{
byteLength = 2;
}
// Get the address of the first line
IntPtr ptr1 = initData.Scan0;
IntPtr ptr2 = destData.Scan0;
unsafe
{
byte *sourcePtr = (byte *)ptr1.ToPointer();
byte *destPtr = (byte *)ptr2.ToPointer();
for (int i = 0; i < destData.Stride; i += 4)
{
for (int j = 0; j < destination.Height; j++)
{
int newX = (int)(i / xZoom);
int newY = (int)(j / yZoom);
if (newX % byteLength != 0)
{
newX -= newX % byteLength; //offset to the first byte of four
}
var pixel = PixelOperations.GetPixelUnsafe(sourcePtr, initData.Stride, newX, newY, byteLength);
PixelOperations.SetPixelUnsafe(destPtr, pixel, destData.Stride, i, j, byteLength);
}
}
}
source.UnlockBits(initData);
destination.UnlockBits(destData);
}
