static public IColorTable FromFile(string path)
{
IColorTable ct = null;
XmlReader r = null;
try
{
r = XmlReader.Create(path);
r.ReadToFollowing("ColorTable");
ColorTableType ctt = (ColorTableType)Enum.Parse(typeof(ColorTableType), r["Type"]);
int cts = int.Parse(r["Size"]);
ScalingAlgorithms sa = (ScalingAlgorithms)Enum.Parse(typeof(ScalingAlgorithms), r["Scale"]);
double min = double.Parse(r["Minimum"]);
double max = double.Parse(r["Maximum"]);
ct = ColorTableFactory.Create(ctt);
if (ct != null)
{
ct.ScalingAlgorithm = ScalingAlgorithmFactory.Create(sa);
ct.Initialize(cts, min, max);
}
}
finally
{
if (r != null)
{
r.Close();
}
}
return(ct);
}
public static IColorTable Create(ColorTableType ctt)
{
IColorTable ct = null;
switch (ctt)
{
case ColorTableType.ReducedColors:
ct = new ReducedColorTable();
break;
case ColorTableType.FullScale:
ct = new FullScaledColorTable();
break;
case ColorTableType.Indexed:
ct = new IndexedColorTable();
break;
}
return(ct);
}
public static extern int GetDIBits(IntPtr dc, IntPtr bmp, int startScan, int scanLineCount, [In, Out] byte[] data, IntPtr info, ColorTableType usage);
private void LoadColorTable(SubCode subCode, ColorTableType tableType)
{
Console.WriteLine("Loading {0} colors", tableType);
List <byte> colors = new List <byte>();
switch (tableType)
{
case ColorTableType.High:
foreach (byte color in subCode.Data)
{
colors.Add((byte)(color & 0x3F3F));
if (colors.Count == 8)
{
break;
}
}
for (int i = 0; i < colors.Count; i++)
{
byte color = colors[i];
int red = (color & 0x3F3F) >> 2;
int halfGreen = (color & 0x3) << 2;
if (this.colorTable.Count < i)
{
this.colorTable.Add(Color.FromArgb(red, halfGreen, 0));
}
else
{
int preRed = this.colorTable[i].R;
int preGreen = this.colorTable[i].G;
this.colorTable[i] = Color.FromArgb(
preRed += (byte)red,
preGreen += (byte)halfGreen,
this.colorTable[i].B);
}
}
break;
case ColorTableType.Low:
subCode.Data.Reverse();
foreach (byte color in subCode.Data)
{
colors.Add(color);
if (colors.Count == 8)
{
break;
}
}
subCode.Data.Reverse();
for (int i = 0; i < colors.Count; i++)
{
byte color = colors[i];
int halfGreen = (color & 0x3) >> 4;
int blue = (color & 0x3F3F) << 2;
if (this.colorTable.Count <= i)
{
this.colorTable.Add(Color.FromArgb(0, halfGreen, blue));
}
else
{
int preGreen = this.colorTable[i].G;
int preBlue = this.colorTable[i].B;
if (preBlue + blue > 255)
{
int temp = (blue + preBlue) - 255;
preGreen += temp;
preBlue -= temp;
}
this.colorTable[i] = Color.FromArgb(
this.colorTable[i].R,
preGreen += (byte)halfGreen,
preBlue += (byte)blue);
}
}
break;
}
}
public static extern int GetDIBits(IntPtr dc, IntPtr bmp, int startScan, int scanLineCount, [In, Out] byte[] data, IntPtr info, ColorTableType usage);