/// <summary>
/// Method in which there is an enciphering of the text in the image
/// </summary>
/// <param name="str">Текст который необходимо зашифровать</param>
public void WriteToPicture(string str)
{
ind = -1;
index = (int)Nums.Zero;
byte[] bt = Encoding.GetEncoding(1251).GetBytes(String.Format("*{0}*{1}", str.Length, str));
Bits bits = null;
bool f = false;
for (var i = (int)Nums.Zero; i < this.im.Width; i++)
{
if (f)
{
break;
}
for (var j = (int)Nums.Zero; j < this.im.Height; j++)
{
if (index == 8 || index == 0)
{
index = (int)Nums.Zero;
ind++;
if (ind == bt.Count())
{
f = true;
break;
}
bits = new Bits(bt[ind]);
while (bits.Lenth != 8)
{
bits.Insert((int)Nums.Zero, (int)Nums.Zero);
}
}
var pixel = this.bm.GetPixel(i, j);
Bits r = new Bits(pixel.R);
while (r.Lenth != 8)
{
r.Insert((int)Nums.Zero, (int)Nums.Zero);
}
r[r.Lenth - (int)Nums.One] = bits[index];
index++;
Bits b = new Bits(pixel.B);
Bits g = new Bits(pixel.G);
this.bm.SetPixel(i, j, Color.FromArgb(r.ToInt(), pixel.G, pixel.B));
}
}
this.name = NewWriteName();
this.bm.Save(this.name);
}
/// <summary>
/// Method which reads out the first bytes and defines whether the picture, and the text size in the image is ciphered
/// </summary>
private void ForRead()
{
int index = (int)Nums.Zero;
int ind = (int)Nums.Zero;
Bits bt = new Bits(255);
bool f = false;
string str = null;
for (var i = (int)Nums.Zero; i < this.im.Width; i++)
{
if (f)
{
break;
}
for (var j = (int)Nums.Zero; j < this.im.Height; j++)
{
if (index == 8)
{
index = (int)Nums.Zero;
this.lstRead.Add(bt.ToInt());
if (Convert.ToChar(this.lstRead[(int)Nums.Zero]) != '*')
{
MessageBox.Show("In this picture nothing is ciphered!", "Info", MessageBoxButtons.OK, MessageBoxIcon.Information);
f = true;
break;
}
int tmp = (int)Nums.Zero;
if (int.TryParse(Convert.ToChar(this.lstRead[ind]).ToString(), out tmp))
{
if (tmp >= (int)Nums.Zero && tmp <= 9)
{
tmp = int.Parse(Convert.ToChar(this.lstRead[ind]).ToString());
str += tmp.ToString();
}
}
if (this.lstRead.Count > (int)Nums.One)
{
if (Convert.ToChar(this.lstRead[ind]) == '*')
{
f = true;
break;
}
}
ind++;
}
var pixel = this.bm.GetPixel(i, j);
Bits r = new Bits(pixel.R);
while (r.Lenth != 8)
{
r.Insert((int)Nums.Zero, (int)Nums.Zero);
}
bt[index] = r[r.Lenth - (int)Nums.One];
r[r.Lenth - (int)Nums.One] = (int)Nums.Zero;
this.bm.SetPixel(i, j, Color.FromArgb(r.ToInt(), pixel.G, pixel.B));
index++;
}
}
if (str != null)
{
this.sizeTxt = int.Parse(str);
}
}
/// <summary>
/// Method in which there is an interpretation of the text from the image
/// </summary>
public void ReadFromPictire()
{
ind = (int)Nums.Zero;
index = (int)Nums.Zero;
List <int> lst = new List <int>();
Bits ar = new Bits(255);
this.lstRead = new List <int>();
bool f = false;
this.sizeTxt = 0;
ForRead();
if (this.sizeTxt == 0)
{
f = true;
}
;
for (var i = (int)Nums.Zero; i < this.im.Width; i++)
{
if (f)
{
break;
}
for (var j = (int)Nums.Zero; j < this.im.Height; j++)
{
if (j < this.lstRead.Count * 8 && i == 0)
{
continue;
}
if ((lst.Count) == this.sizeTxt)
{
f = true;
break;
}
if (index == 8)
{
lst.Add(ar.ToInt());
ind++;
index = (int)Nums.Zero;
}
var pixel = this.bm.GetPixel(i, j);
Bits r = new Bits(pixel.R);
while (r.Lenth != 8)
{
r.Insert((int)Nums.Zero, (int)Nums.Zero);
}
ar[index] = r[r.Lenth - (int)Nums.One];
r[r.Lenth - (int)Nums.One] = (int)Nums.Zero;
index++;
this.bm.SetPixel(i, j, Color.FromArgb(r.ToInt(), pixel.G, pixel.B));
if (f)
{
break;
}
}
}
byte[] rezult = new byte[lst.Count];
ind = (int)Nums.Zero;
for (var i = (int)Nums.Zero; i < lst.Count; i++)
{
rezult[ind] = Convert.ToByte(lst[i]);
ind++;
}
this.name = NewReadName();
this.bm.Save(this.name);
this.readTxt = Encoding.GetEncoding(1251).GetString(rezult);
}