private static byte ByteComposition(StByte b, bool alpha)
{
byte result = 0;
result += (byte)(b.a1 * 100);
if (alpha)
{
switch (b.a4)
{
case 2:
b.a2 += 5;
b.a3 += 5;
break;
case 3:
b.a2 += 5;
break;
case 4:
b.a3 += 5;
break;
}
}
result += (byte)(b.a2 * 10);
result += b.a3;
return(result);
}
private static Pix MixByteAndPixel(Pix p, StByte b)
{
p.blue = (byte)(((byte)(p.blue / 10)) * 10);
if (p.blue == 250)
{
p.blue = 240;
}
p.blue += b.a1;
p.green = (byte)(((byte)(p.green / 10)) * 10);
if (p.green == 250)
{
p.green = 240;
}
p.green += b.a2;
p.red = (byte)(((byte)(p.red / 10)) * 10);
if (p.red == 250)
{
p.red = 240;
}
p.red += b.a3;
p.alpha = (byte)(((byte)(p.alpha / 10)) * 10);
if (p.alpha == 250)
{
p.alpha = 240;
}
p.alpha += b.a4;
return(p);
}
internal static byte[] Extraction(byte[] img)
{
byte[] length = new byte[4];
byte[] data = null;
using (var bmp = (Bitmap)Image.FromStream(new MemoryStream(img)))
{
int index = 0;
bool end = false;
unsafe
{
BitmapData bmd = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), System.Drawing.Imaging.ImageLockMode.ReadOnly, bmp.PixelFormat);
int size = bmd.Stride / bmp.Width;
bool hasAlpha = size == 4;
for (int y = 0; y < bmp.Height; y++)
{
for (int x = 0; x < bmp.Width; x++)
{
int offset = (y * bmd.Stride) + (x * size);
Pix pix = new Pix
{
blue = ((byte *)bmd.Scan0)[offset],
green = ((byte *)bmd.Scan0)[offset + 1],
red = ((byte *)bmd.Scan0)[offset + 2],
alpha = ((hasAlpha) ? ((byte *)bmd.Scan0)[offset + 3] : (byte)255)
};
StByte b = SecretionByteFromPixel(pix);
byte wb = ByteComposition(b, hasAlpha);
if (data == null)
{
length[index] = wb;
index++;
if (index == 4)
{
data = new byte[BitConverter.ToInt32(length, 0)];
index = 0;
}
}
else
{
data[index] = wb;
index++;
if (index >= data.Length)
{
end = true;
break;
}
}
}
if (end)
{
break;
}
}
bmp.UnlockBits(bmd);
}
}
return(data);
}
private static StByte SecretionByteFromPixel(Pix p)
{
StByte result = new StByte();
result.a1 = (byte)(p.blue - ((byte)(p.blue / 10)) * 10);
result.a2 = (byte)(p.green - ((byte)(p.green / 10)) * 10);
result.a3 = (byte)(p.red - ((byte)(p.red / 10)) * 10);
result.a4 = (byte)(p.alpha - ((byte)(p.alpha / 10)) * 10);
return(result);
}
private static StByte ByteDecomposition(byte b, bool alpha)
{
StByte result = new StByte();
while (b > 99)
{
result.a1++;
b -= 100;
}
while (b > 9)
{
result.a2++;
b -= 10;
}
result.a3 = b;
if (alpha)
{
if (result.a2 >= 5 && result.a3 >= 5)
{
result.a4 = 2;
result.a2 -= 5;
result.a3 -= 5;
}
else if (result.a2 >= 5)
{
result.a4 = 3;
result.a2 -= 5;
}
else if (result.a3 >= 5)
{
result.a4 = 4;
result.a3 -= 5;
}
else
{
result.a4 = 5;
}
}
else
{
result.a4 = 5;
}
return(result);
}
private static StByte ByteDecomposition(byte b, bool alpha)
{
StByte result = new StByte();
while (b > 99)
{
result.a1++;
b -= 100;
}
while (b > 9)
{
result.a2++;
b -= 10;
}
result.a3 = b;
if (alpha)
{
if (result.a2 >= 5 && result.a3 >= 5)
{
result.a4 = 2;
result.a2 -= 5;
result.a3 -= 5;
}
else if (result.a2 >= 5)
{
result.a4 = 3;
result.a2 -= 5;
}
else if (result.a3 >= 5)
{
result.a4 = 4;
result.a3 -= 5;
}
else
{
result.a4 = 5;
}
}
else
{
result.a4 = 5;
}
return result;
}
private static byte ByteComposition(StByte b, bool alpha)
{
byte result = 0;
result += (byte)(b.a1 * 100);
if (alpha)
{
switch (b.a4)
{
case 2:
b.a2 += 5;
b.a3 += 5;
break;
case 3:
b.a2 += 5;
break;
case 4:
b.a3 += 5;
break;
}
}
result += (byte)(b.a2 * 10);
result += b.a3;
return result;
}
private static StByte SecretionByteFromPixel(Pix p)
{
StByte result = new StByte();
result.a1 = (byte)(p.blue - ((byte)(p.blue / 10)) * 10);
result.a2 = (byte)(p.green - ((byte)(p.green / 10)) * 10);
result.a3 = (byte)(p.red - ((byte)(p.red / 10)) * 10);
result.a4 = (byte)(p.alpha - ((byte)(p.alpha / 10)) * 10);
return result;
}
private static Pix MixByteAndPixel(Pix p, StByte b)
{
p.blue = (byte)(((byte)(p.blue / 10)) * 10);
if (p.blue == 250) p.blue = 240;
p.blue += b.a1;
p.green = (byte)(((byte)(p.green / 10)) * 10);
if (p.green == 250) p.green = 240;
p.green += b.a2;
p.red = (byte)(((byte)(p.red / 10)) * 10);
if (p.red == 250) p.red = 240;
p.red += b.a3;
p.alpha = (byte)(((byte)(p.alpha / 10)) * 10);
if (p.alpha == 250) p.alpha = 240;
p.alpha += b.a4;
return p;
}
