public Profile(ColorCIExyY whitepoint, ColorCIExyYTriple primaries, ToneCurve [] gamma)
{
Handle = new HandleRef (this, NativeMethods.CmsCreateRGBProfile (out whitepoint, out primaries, CopyHandles (gamma)));
}
public static Profile CreateAlternateRgb()
{
// FIXME I'm basing this off the values set in the camera
// exif data when the adobe profile is selected. They could
// easily be off
ColorCIExyY wp = new ColorCIExyY (.3127, .329, 1.0);
ColorCIExyYTriple primaries = new ColorCIExyYTriple (
new ColorCIExyY (.64, .33, 1.0),
new ColorCIExyY (.21, .71, 1.0),
new ColorCIExyY (.15, .06, 1.0));
ToneCurve tc = new ToneCurve (2.2);
ToneCurve [] tcs = new ToneCurve [] { tc, tc, tc, tc};
return new Profile (wp, primaries, tcs);
}
public Cms.Profile GetProfile ()
{
Cms.ColorCIExyY whitepoint = new Cms.ColorCIExyY (0, 0, 0);
Cms.ColorCIExyYTriple primaries = new Cms.ColorCIExyYTriple (whitepoint, whitepoint, whitepoint);
Cms.GammaTable [] transfer = null;
int bits_per_sample = 8;
double gamma = 2.2;
foreach (DirectoryEntry e in entries) {
switch (e.Id) {
case TagId.InterColorProfile:
try {
return new Cms.Profile (e.RawData);
} catch (System.Exception ex) {
System.Console.WriteLine (ex);
}
break;
case TagId.ColorSpace:
switch ((ColorSpace)e.ValueAsLong [0]) {
case ColorSpace.StandardRGB:
return Cms.Profile.CreateStandardRgb ();
case ColorSpace.AdobeRGB:
return Cms.Profile.CreateAlternateRgb ();
case ColorSpace.Uncalibrated:
System.Console.WriteLine ("Uncalibrated colorspace");
break;
}
break;
case TagId.WhitePoint:
Rational [] white = e.RationalValue;
whitepoint.x = white [0].Value;
whitepoint.y = white [1].Value;
whitepoint.Y = 1.0;
break;
case TagId.PrimaryChromaticities:
Rational [] colors = e.RationalValue;
primaries.Red.x = colors [0].Value;
primaries.Red.y = colors [1].Value;
primaries.Red.Y = 1.0;
primaries.Green.x = colors [2].Value;
primaries.Green.y = colors [3].Value;
primaries.Green.Y = 1.0;
primaries.Blue.x = colors [4].Value;
primaries.Blue.y = colors [5].Value;
primaries.Blue.Y = 1.0;
break;
case TagId.TransferFunction:
ushort [] trns = e.ShortValue;
ushort gamma_count = (ushort) (1 << bits_per_sample);
Cms.GammaTable [] tables = new Cms.GammaTable [3];
System.Console.WriteLine ("Parsing transfer function: count = {0}", trns.Length);
// FIXME we should use the TransferRange here
// FIXME we should use bits per sample here
for (int c = 0; c < 3; c++) {
tables [c] = new Cms.GammaTable (trns, c * gamma_count, gamma_count);
}
transfer = tables;
break;
case TagId.ExifIfdPointer:
SubdirectoryEntry exif = (SubdirectoryEntry) e;
DirectoryEntry ee = exif.Directory [0].Lookup ((int)TagId.Gamma);
if (ee == null)
break;
Rational rgamma = ee.RationalValue [0];
gamma = rgamma.Value;
break;
}
}
if (transfer == null) {
Cms.GammaTable basic = new Cms.GammaTable (1 << bits_per_sample, gamma);
transfer = new Cms.GammaTable [] { basic, basic, basic };
}
// if we didn't get a white point or primaries, give up
if (whitepoint.Y != 1.0 || primaries.Red.Y != 1.0)
return null;
return new Cms.Profile (whitepoint, primaries, transfer);
}
public Profile(ColorCIExyY whitepoint, ColorCIExyYTriple primaries, ToneCurve[] gamma)
{
Handle = new HandleRef(this, NativeMethods.CmsCreateRGBProfile(out whitepoint, out primaries, CopyHandles(gamma)));
}
public static extern IntPtr CmsCreateRGBProfile(out ColorCIExyY whitepoint, out ColorCIExyYTriple primaries, HandleRef [] transfer_function);
public static extern IntPtr CmsCreateRGBProfile(out ColorCIExyY whitepoint, out ColorCIExyYTriple primaries,
HandleRef [] transfer_function);
