public void Insert_T(object bmp, bool useOpap)
{
DateTime start = DateTime.Now;
Opap methodOPAP = new Opap();
Bitmap bmap = (Bitmap)bmp;
int k = 0, i = 0, j = 0, p = 0;
int newR, newG, newB;
int bitSelect = bitSelecT, bitMove;
Color theColor = new Color();
Color originColor = new Color();
int msgL = message.Length;
int intCounter = 0;
//calcul de pas
float stop = ((float)msgL * 8) / ((float)bitSelect * 3);
if (8 % bitSelect != 0)
{
int stopPixelL = (bitSelect - (8 % bitSelect)) * msgL;
stop = (((float)msgL * 8) + (float)stopPixelL) / ((float)bitSelect * 3);
}
if (stop % 1 != 0)
{
stop++;
}
int stride = (bmap.Height * bmap.Width - reserved) / (int)stop;
//insertion du watermark "YOZ" sur 4 pixels debut
string watermarked = "yoz";
theColor = bmap.GetPixel(j, i);
newR = theColor.R - theColor.R % 4 + 1;
newG = theColor.G - theColor.G % 4 + 2;
newB = theColor.B - theColor.B % 4 + 3;
theColor = Color.FromArgb(newR, newG, newB);
bmap.SetPixel(j, i, theColor);
j++;
theColor = bmap.GetPixel(j, i);
newR = theColor.R - theColor.R % 4 + 1;
newG = theColor.G - theColor.G % 4 + 3;
newB = theColor.B - theColor.B % 4 + 3;
theColor = Color.FromArgb(newR, newG, newB);
bmap.SetPixel(j, i, theColor);
j++;
theColor = bmap.GetPixel(j, i);
newR = theColor.R - theColor.R % 4 + 2;
newG = theColor.G - theColor.G % 4 + 1; //if crypted we insert "yoc" instead of "yoz"
newB = theColor.B - theColor.B % 4 + 2; if (crypted)
{
newB = theColor.B - theColor.B % 4 + 3;
}
theColor = Color.FromArgb(newR, newG, newB);
bmap.SetPixel(j, i, theColor);
j++;
theColor = bmap.GetPixel(j, i);
newR = theColor.R - theColor.R % 4 + 2; if (crypted)
{
newR = theColor.R - theColor.R % 4 + 0;
}
newG = theColor.G - theColor.G % 4 + 3; if (crypted)
{
newG = theColor.G - theColor.G % 4 + 2;
}
newB = theColor.B - theColor.B % 4 + 1; if (crypted)
{
newB = theColor.B - theColor.B % 4 + 1;
}
theColor = Color.FromArgb(newR, newG, newB);
bmap.SetPixel(j, i, theColor);
j++;
//insertion de la taille sur 6 pixels
while (intCounter < 30)
{
theColor = bmap.GetPixel(j, i);
newR = theColor.R - theColor.R % 4 + msgL % 4;
msgL >>= 2;
newG = theColor.G - theColor.G % 4 + msgL % 4;
msgL >>= 2;
newB = theColor.B - theColor.B % 4 + msgL % 4;
msgL >>= 2;
theColor = Color.FromArgb(newR, newG, newB);
bmap.SetPixel(j, i, theColor);
j++;
intCounter += 6;
}
theColor = bmap.GetPixel(j, i);
newR = theColor.R - theColor.R % 4 + msgL % 4; // 31 +32 eme bit du int
int temp = bitSelect;
newG = theColor.G - theColor.G % 4 + temp % 4; // 4 bits pour le bitSelect
temp >>= 2;
newB = theColor.B - theColor.B % 4 + temp % 4;
theColor = Color.FromArgb(newR, newG, newB);
bmap.SetPixel(j, i, theColor);
j = reserved;
//insertion du message
for (k = 0; k < message.Length; k++)
{
char letter = Convert.ToChar(message.Substring(k, 1));
int letterI = Convert.ToInt32(letter);
bitMove = bitSelect;
while ((bitMove - bitSelect) < 8)
{
theColor = bmap.GetPixel(j, i);
originColor = theColor;
while (p < 3 && (bitMove - bitSelect) < 8)
{
switch (p)
{
case 0:
newR = theColor.R - theColor.R % (int)Math.Pow(2, bitSelect);
newR += letterI % (int)Math.Pow(2, bitSelect);
letterI >>= bitSelect;
theColor = Color.FromArgb(newR, theColor.G, theColor.B);
break;
case 1:
newG = theColor.G - theColor.G % (int)Math.Pow(2, bitSelect);
newG += letterI % (int)Math.Pow(2, bitSelect);
letterI >>= bitSelect;
theColor = Color.FromArgb(theColor.R, newG, theColor.B);
break;
case 2:
newB = theColor.B - theColor.B % (int)Math.Pow(2, bitSelect);
newB += letterI % (int)Math.Pow(2, bitSelect);
letterI >>= bitSelect;
theColor = Color.FromArgb(theColor.R, theColor.G, newB);
break;
}
bitMove += bitSelect;
p++;
}
bmap.SetPixel(j, i, theColor);
if (useOpap)
{
bmap.SetPixel(j, i, methodOPAP.OPAP(originColor, theColor, bitSelect));
}
if (p == 3)
{
p = 0;
if (j + stride <= bmap.Width - 1)
{
j += stride;
}
else
{
int stridesLeft;
stridesLeft = stride - (bmap.Width - 1 - j);
i++;
while (stridesLeft > bmap.Width)
{
stridesLeft -= bmap.Width;
i++;
}
j = stridesLeft - 1;
}
}
}
}
TimeSpan timeItTook = DateTime.Now - start;
Console.WriteLine("Time elapsed : Minutes: {0} Seconds: {1} Milliseconds: {2}", timeItTook.Minutes, timeItTook.Seconds, timeItTook.Milliseconds);
crypted = false;
OnImageFinished(bmap, null);
}
public void Insert_F(object bmp, bool useOpap)
{
Opap methodOPAP = new Opap();
Bitmap bmap = (Bitmap)bmp;
int k = 0, i = 0, j = 0, p = 0;
int newR, newG, newB;
int bitSelect = bitSelecT, bitMove;
Color theColor = new Color();
Color originColor = new Color();
int msgL = FileBytes.Length;
int intCounter = 0;
//calcul de pas
float stop = ((float)msgL * 8) / ((float)bitSelect * 3);
if (8 % bitSelect != 0)
{
int stopPixelL = (bitSelect - (8 % bitSelect)) * msgL;
stop = (((float)msgL * 8) + (float)stopPixelL) / ((float)bitSelect * 3);
}
if (stop % 1 != 0)
{
stop++;
}
int stride = (bmap.Height * bmap.Width - reserved) / (int)stop;
//insertion du watermark "ZOY" sur 4 pixels debut
string watermarked = "zoy";
theColor = bmap.GetPixel(j, i);
newR = theColor.R - theColor.R % 4 + 2;
newG = theColor.G - theColor.G % 4 + 2;
newB = theColor.B - theColor.B % 4 + 3;
theColor = Color.FromArgb(newR, newG, newB);
bmap.SetPixel(j, i, theColor);
j++;
theColor = bmap.GetPixel(j, i);
newR = theColor.R - theColor.R % 4 + 1;
newG = theColor.G - theColor.G % 4 + 3;
newB = theColor.B - theColor.B % 4 + 3;
theColor = Color.FromArgb(newR, newG, newB);
bmap.SetPixel(j, i, theColor);
j++;
theColor = bmap.GetPixel(j, i);
newR = theColor.R - theColor.R % 4 + 2;
newG = theColor.G - theColor.G % 4 + 1; //if crypted we insert "zoc" instead of "zoy"
newB = theColor.B - theColor.B % 4 + 1; if (crypted)
{
newB = theColor.B - theColor.B % 4 + 3;
}
theColor = Color.FromArgb(newR, newG, newB);
bmap.SetPixel(j, i, theColor);
j++;
theColor = bmap.GetPixel(j, i);
newR = theColor.R - theColor.R % 4 + 2; if (crypted)
{
newR = theColor.R - theColor.R % 4 + 0;
}
newG = theColor.G - theColor.G % 4 + 3; if (crypted)
{
newG = theColor.G - theColor.G % 4 + 2;
}
newB = theColor.B - theColor.B % 4 + 1; if (crypted)
{
newB = theColor.B - theColor.B % 4 + 1;
}
theColor = Color.FromArgb(newR, newG, newB);
bmap.SetPixel(j, i, theColor);
j++;
//insertion de la taille sur 6 pixels
while (intCounter < 30)
{
theColor = bmap.GetPixel(j, i);
newR = theColor.R - theColor.R % 4 + msgL % 4;
msgL >>= 2;
newG = theColor.G - theColor.G % 4 + msgL % 4;
msgL >>= 2;
newB = theColor.B - theColor.B % 4 + msgL % 4;
msgL >>= 2;
theColor = Color.FromArgb(newR, newG, newB);
bmap.SetPixel(j, i, theColor);
j++;
intCounter += 6;
}
theColor = bmap.GetPixel(j, i);
newR = theColor.R - theColor.R % 4 + msgL % 4; // 31 +32 eme bit du int
int temp = bitSelect;
newG = theColor.G - theColor.G % 4 + temp % 4; // 4 bits pour le bitSelect
temp >>= 2;
newB = theColor.B - theColor.B % 4 + temp % 4;
theColor = Color.FromArgb(newR, newG, newB);
bmap.SetPixel(j, i, theColor);
j = reserved;
//insertion du message
for (k = 0; k < FileBytes.Length; k++)
{
int fileByte = FileBytes[k];
bitMove = bitSelect;
while ((bitMove - bitSelect) < 8)
{
theColor = bmap.GetPixel(j, i);
originColor = theColor;
while (p < 3 && (bitMove - bitSelect) < 8)
{
switch (p)
{
case 0:
newR = theColor.R - theColor.R % (int)Math.Pow(2, bitSelect);
newR += fileByte % (int)Math.Pow(2, bitSelect);
fileByte >>= bitSelect;
theColor = Color.FromArgb(newR, theColor.G, theColor.B);
break;
case 1:
newG = theColor.G - theColor.G % (int)Math.Pow(2, bitSelect);
newG += fileByte % (int)Math.Pow(2, bitSelect);
fileByte >>= bitSelect;
theColor = Color.FromArgb(theColor.R, newG, theColor.B);
break;
case 2:
newB = theColor.B - theColor.B % (int)Math.Pow(2, bitSelect);
newB += fileByte % (int)Math.Pow(2, bitSelect);
fileByte >>= bitSelect;
theColor = Color.FromArgb(theColor.R, theColor.G, newB);
break;
}
bitMove += bitSelect;
p++;
}
bmap.SetPixel(j, i, theColor);
if (useOpap)
{
bmap.SetPixel(j, i, methodOPAP.OPAP(originColor, theColor, bitSelect));
}
if (p == 3)
{
p = 0;
if (j + stride <= bmap.Width - 1)
{
j += stride;
}
else
{
int stridesLeft;
stridesLeft = stride - (bmap.Width - 1 - j);
i++;
while (stridesLeft > bmap.Width)
{
stridesLeft -= bmap.Width;
i++;
}
j = stridesLeft - 1;
}
}
}
}
crypted = false;
OnImageFinished(bmap, null);
}
