static
int bchswSampler(register const cmsUInt16Number In[], register cmsUInt16Number Out[], register void* Cargo)
{
cmsCIELab LabIn, LabOut;
cmsCIELCh LChIn, LChOut;
cmsCIEXYZ XYZ;
LPBCHSWADJUSTS bchsw = (LPBCHSWADJUSTS) Cargo;
cmsLabEncoded2Float(&LabIn, In);
cmsLab2LCh(&LChIn, &LabIn);
// Do some adjusts on LCh
LChOut.L = LChIn.L * bchsw ->Contrast + bchsw ->Brightness;
LChOut.C = LChIn.C + bchsw -> Saturation;
LChOut.h = LChIn.h + bchsw -> Hue;
cmsLCh2Lab(&LabOut, &LChOut);
// Move white point in Lab
cmsLab2XYZ(&bchsw ->WPsrc, &XYZ, &LabOut);
cmsXYZ2Lab(&bchsw ->WPdest, &LabOut, &XYZ);
// Back to encoded
cmsFloat2LabEncoded(Out, &LabOut);
return TRUE;
}
static
int bchswSampler(register WORD In[], register WORD Out[], register LPVOID Cargo)
{
cmsCIELab LabIn, LabOut;
cmsCIELCh LChIn, LChOut;
cmsCIEXYZ XYZ;
double l;
double power;
gboolean shift;
LPBCHSWADJUSTS bchsw = (LPBCHSWADJUSTS) Cargo;
cmsLabEncoded2Float(&LabIn, In);
// Move white point in Lab
cmsLab2XYZ(&bchsw ->WPsrc, &XYZ, &LabIn);
cmsXYZ2Lab(&bchsw ->WPdest, &LabIn, &XYZ);
shift = (LabIn.L > 0.5);
l = LabIn.L / 100;
if (shift)
l = 1.0 - l;
if (l < 0.0)
l = 0.0;
if (bchsw->Contrast < 0)
power = 1.0 + bchsw->Contrast;
else
power = (bchsw->Contrast == 1.0) ? 127 : 1.0 / (1.0 - bchsw->Contrast);
l = 0.5 * pow (l * 2.0 , power);
if (shift)
l = 1.0 - l;
LabIn.L = l * 100;
cmsLab2LCh(&LChIn, &LabIn);
// Do some adjusts on LCh
LChOut.L = LChIn.L * bchsw ->Exposure + bchsw ->Brightness;
LChOut.C = MAX (0, LChIn.C + bchsw ->Saturation);
LChOut.h = LChIn.h + bchsw ->Hue;
cmsLCh2Lab(&LabOut, &LChOut);
// Back to encoded
cmsFloat2LabEncoded(Out, &LabOut);
return TRUE;
}
