private static void TestLChToCieXYZ(LxyModel model, float l, float c, float h, float expectedX, float expectedY, float expectedZ)
{
float x, y, z;
LChUtils.LChToCieXYZ(l, c, h, out x, out y, out z, model);
Assert.That(x, Is.EqualTo(expectedX).Within(Epsilon));
Assert.That(y, Is.EqualTo(expectedY).Within(Epsilon));
Assert.That(z, Is.EqualTo(expectedZ).Within(Epsilon));
}
private static void TestCieXYZToLCh(LxyModel model, float x, float y, float z, float expectedL, float expectedC, float expectedH)
{
float l, c, h;
LChUtils.CieXYZToLCh(x, y, z, out l, out c, out h, model);
Assert.That(l, Is.EqualTo(expectedL).Within(Epsilon));
Assert.That(c, Is.EqualTo(expectedC).Within(Epsilon));
Assert.That(h, Is.EqualTo(expectedH).Within(Epsilon));
}
public static void RGBToLCh(
this RGBColorSystem @this,
float r, float g, float b,
out float l, out float c, out float h,
LxyModel model = LxyModel.Lab, float[] referenceWhite = null)
{
float x, y, z;
@this.RGBToCieXYZ(r, g, b, out x, out y, out z);
LChUtils.CieXYZToLCh(x, y, z, out l, out c, out h, model, referenceWhite);
}
public static void LChToRGB(
this RGBColorSystem @this,
float l, float c, float h,
out float r, out float g, out float b,
LxyModel model = LxyModel.Lab, float[] referenceWhite = null)
{
float x, y, z;
LChUtils.LChToCieXYZ(l, c, h, out x, out y, out z, model, referenceWhite);
@this.CieXYZToRGB(x, y, z, out r, out g, out b);
}
public static void LChToCieXYZ(
float l, float c, float h,
out float x, out float y, out float z,
LxyModel model = LxyModel.Lab, float[] referenceWhiteXyz = null)
{
float lxy_l, lxy_x, lxy_y;
LChToLxy(l, c, h, out lxy_l, out lxy_x, out lxy_y);
switch (model)
{
case LxyModel.Lab:
CieLabUtils.LabToCieXYZ(lxy_l, lxy_x, lxy_y, out x, out y, out z, referenceWhiteXyz);
break;
case LxyModel.Luv:
CieLuvUtils.LuvToCieXYZ(lxy_l, lxy_x, lxy_y, out x, out y, out z, referenceWhiteXyz);
break;
default:
throw new ArgumentException("Illegal model!");
}
}
public static void CieXYZToLCh(
float x, float y, float z,
out float l, out float c, out float h,
LxyModel model = LxyModel.Lab, float[] referenceWhiteXyz = null)
{
float lxy_l, lxy_x, lxy_y;
switch (model)
{
case LxyModel.Lab:
CieLabUtils.CieXYZToLab(x, y, z, out lxy_l, out lxy_x, out lxy_y, referenceWhiteXyz);
break;
case LxyModel.Luv:
CieLuvUtils.CieXYZToLuv(x, y, z, out lxy_l, out lxy_x, out lxy_y, referenceWhiteXyz);
break;
default:
throw new ArgumentException("Illegal model!");
}
LxyToLCh(lxy_l, lxy_x, lxy_y, out l, out c, out h);
}