public Image ChangeColorSpace(ColorSpace cs)
{
if (_cm.colorspace == cs)
{
return(this);
}
if (_cm.colorspace == ColorSpace.RGB && cs == ColorSpace.YCbCr)
{
for (int i = 0; i < width; i++)
{
for (int j = 0; j < height; j++)
{
YCbCr.fromRGB(ref _raster[0][i, j], ref _raster[1][i, j], ref _raster[2][i, j]);
}
}
_cm.colorspace = ColorSpace.YCbCr;
}
else if (_cm.colorspace == ColorSpace.YCbCr && cs == ColorSpace.RGB)
{
for (int k = 0; k < width; k++)
{
for (int l = 0; l < height; l++)
{
YCbCr.toRGB(ref _raster[0][k, l], ref _raster[1][k, l], ref _raster[2][k, l]);
}
}
_cm.colorspace = ColorSpace.RGB;
}
else if (_cm.colorspace == ColorSpace.Gray && cs == ColorSpace.YCbCr)
{
byte[,] array = new byte[width, height];
byte[,] array2 = new byte[width, height];
for (int m = 0; m < width; m++)
{
for (int n = 0; n < height; n++)
{
array[m, n] = 128;
array2[m, n] = 128;
}
}
_raster = new byte[3][, ]
{
_raster[0],
array,
array2
};
_cm.colorspace = ColorSpace.YCbCr;
}
else
{
if (_cm.colorspace != 0 || cs != ColorSpace.RGB)
{
throw new Exception("Colorspace conversion not supported.");
}
ChangeColorSpace(ColorSpace.YCbCr);
ChangeColorSpace(ColorSpace.RGB);
}
return(this);
}
/// <summary>
/// Converts the colorspace of an image (in-place)
/// </summary>
/// <param name="cs">Colorspace to convert into</param>
/// <returns>Self</returns>
public Image ChangeColorSpace(ColorSpace cs)
{
// Colorspace is already correct
if (_cm.colorspace == cs)
{
return(this);
}
byte[] ycbcr = new byte[3];
byte[] rgb = new byte[3];
if (_cm.colorspace == ColorSpace.RGB && cs == ColorSpace.YCbCr)
{
/*
* Y' = + 0.299 * R'd + 0.587 * G'd + 0.114 * B'd
* Cb = 128 - 0.168736 * R'd - 0.331264 * G'd + 0.5 * B'd
* Cr = 128 + 0.5 * R'd - 0.418688 * G'd - 0.081312 * B'd
*
*/
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
YCbCr.fromRGB(ref _raster[0][x, y], ref _raster[1][x, y], ref _raster[2][x, y]);
}
}
_cm.colorspace = ColorSpace.YCbCr;
}
else if (_cm.colorspace == ColorSpace.YCbCr && cs == ColorSpace.RGB)
{
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
// 0 is LUMA
// 1 is BLUE
// 2 is RED
YCbCr.toRGB(ref _raster[0][x, y], ref _raster[1][x, y], ref _raster[2][x, y]);
}
}
_cm.colorspace = ColorSpace.RGB;
}
else if (_cm.colorspace == ColorSpace.Gray && cs == ColorSpace.YCbCr)
{
// To convert to YCbCr, we just add two 128-filled chroma channels
byte[,] Cb = new byte[width, height];
byte[,] Cr = new byte[width, height];
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
Cb[x, y] = 128; Cr[x, y] = 128;
}
}
_raster = new byte[][, ] {
_raster[0], Cb, Cr
};
_cm.colorspace = ColorSpace.YCbCr;
}
else if (_cm.colorspace == ColorSpace.Gray && cs == ColorSpace.RGB)
{
ChangeColorSpace(ColorSpace.YCbCr);
ChangeColorSpace(ColorSpace.RGB);
}
else
{
throw new Exception("Colorspace conversion not supported.");
}
return(this);
}
public Image ChangeColorSpace(ColorSpace cs)
{
if (this._cm.colorspace != cs)
{
int num;
int num2;
byte[] buffer = new byte[3];
byte[] buffer2 = new byte[3];
if ((this._cm.colorspace == ColorSpace.RGB) && (cs == ColorSpace.YCbCr))
{
for (num = 0; num < this.width; num++)
{
num2 = 0;
while (num2 < this.height)
{
YCbCr.fromRGB(ref this._raster[0][num, num2], ref this._raster[1][num, num2], ref this._raster[2][num, num2]);
num2++;
}
}
this._cm.colorspace = ColorSpace.YCbCr;
}
else if ((this._cm.colorspace == ColorSpace.YCbCr) && (cs == ColorSpace.RGB))
{
for (num = 0; num < this.width; num++)
{
num2 = 0;
while (num2 < this.height)
{
YCbCr.toRGB(ref this._raster[0][num, num2], ref this._raster[1][num, num2], ref this._raster[2][num, num2]);
num2++;
}
}
this._cm.colorspace = ColorSpace.RGB;
}
else if ((this._cm.colorspace == ColorSpace.Gray) && (cs == ColorSpace.YCbCr))
{
byte[,] buffer3 = new byte[this.width, this.height];
byte[,] buffer4 = new byte[this.width, this.height];
for (num = 0; num < this.width; num++)
{
for (num2 = 0; num2 < this.height; num2++)
{
buffer3[num, num2] = 0x80;
buffer4[num, num2] = 0x80;
}
}
this._raster = new byte[][, ] {
this._raster[0], buffer3, buffer4
};
this._cm.colorspace = ColorSpace.YCbCr;
}
else
{
if ((this._cm.colorspace != ColorSpace.Gray) || (cs != ColorSpace.RGB))
{
throw new Exception("Colorspace conversion not supported.");
}
this.ChangeColorSpace(ColorSpace.YCbCr);
this.ChangeColorSpace(ColorSpace.RGB);
}
}
return(this);
}
