public void TestAlloc()
{
ushort [] values = new ushort [] { 0, 0x00ff, 0xffff };
GammaTable t = new GammaTable (values);
for (int i = 0; i < values.Length; i++) {
Assert.AreEqual (t[i], values [i]);
}
}
protected override List <Cms.Profile> GenerateAdjustments()
{
List <Cms.Profile> profiles = new List <Cms.Profile> ();
Histogram hist = new Histogram(Input);
tables = new GammaTable [3];
for (int channel = 0; channel < tables.Length; channel++)
{
int high, low;
hist.GetHighLow(channel, out high, out low);
System.Console.WriteLine("high = {0}, low = {1}", high, low);
tables [channel] = StretchChannel(255, low / 255.0, high / 255.0);
}
profiles.Add(new Cms.Profile(IccColorSpace.Rgb, tables));
return(profiles);
}
public void Linearize(string name)
{
GammaTable table = new GammaTable(new ushort [] { 0x0000, 0x0000, 0x0000, 0x0000 });
Profile link = new Profile(IccColorSpace.Rgb, new GammaTable [] { table, table, table });
string path = CreateFile(name, 32);
using (FilterRequest req = new FilterRequest(path)) {
ColorFilter filter = new ColorFilter();
filter.DeviceLink = link;
Assert.IsTrue(filter.Convert(req), "Filter failed to operate");
req.Preserve(req.Current);
Assert.IsTrue(System.IO.File.Exists(req.Current.LocalPath),
"Error: Did not create " + req.Current);
Assert.IsTrue(new FileInfo(req.Current.LocalPath).Length > 0,
"Error: " + req.Current + "is Zero length");
using (ImageFile img = ImageFile.Create(req.Current)) {
Pixbuf pixbuf = img.Load();
Assert.IsNotNull(pixbuf);
// We linearized to all black so this should pass the gray test
Assert.IsTrue(PixbufUtils.IsGray(pixbuf, 1), "failed to linearize" + req.Current);
}
}
}
public override Cms.Profile GetProfile ()
{
ColorChunk color = null;
IccpChunk icc = null;
GammaChunk gamma = null;
StandardRgbChunk srgb = null;
double gamma_value = 2.2;
ColorCIExyY red = new ColorCIExyY (0.64, 0.33, 1.0);
ColorCIExyY green = new ColorCIExyY (0.3, 0.6, 1.0);
ColorCIExyY blue = new ColorCIExyY (0.15, 0.06, 1.0);
ColorCIExyY whitepoint = new ColorCIExyY (0.3127, 0.329, 1.0);
ColorCIExyYTriple chroma = new ColorCIExyYTriple (red, green, blue);
//System.Console.WriteLine ("Trying to get profile");
foreach (Chunk chunk in Chunks) {
if (color == null)
color = chunk as ColorChunk;
if (icc == null)
icc = chunk as IccpChunk;
if (srgb == null)
srgb = chunk as StandardRgbChunk;
if (gamma == null)
gamma = chunk as GammaChunk;
}
//System.Console.WriteLine ("color: {0} icc: {1} srgb: {2} gamma: {3}", color, icc, srgb, gamma);
if (icc != null) {
try {
return new Profile (icc.Profile);
} catch (System.Exception ex) {
//System.Console.WriteLine ("Error trying to decode embedded profile" + ex.ToString ());
}
}
if (srgb != null)
return Profile.CreateStandardRgb ();
if (gamma != null)
gamma_value = 1 / gamma.Gamma;
if (color != null) {
whitepoint = new ColorCIExyY (color.WhiteX.Value, color.WhiteY.Value, 1.0);
red = new ColorCIExyY (color.RedX.Value, color.RedY.Value, 1.0);
green = new ColorCIExyY (color.GreenX.Value, color.GreenY.Value, 1.0);
blue = new ColorCIExyY (color.BlueX.Value, color.BlueY.Value, 1.0);
chroma = new ColorCIExyYTriple (red, green, blue);
}
if (color != null || gamma != null) {
GammaTable table = new GammaTable (1024, gamma_value);
return new Profile (whitepoint, chroma, new GammaTable [] {table, table, table});
}
return null;
}
