void LcmsColorProfileContainer::LinearizeFloatValueFast(QVector <double> & Value) const
{
//we can only reliably delinearise in the 0-1.0 range, outside of that leave the value alone.
QVector <quint16> TRCtriplet(3);
TRCtriplet[0] = Value[0]*65535;
TRCtriplet[1] = Value[1]*65535;
TRCtriplet[2] = Value[2]*65535;
if (d->hasColorants) {
if (!cmsIsToneCurveLinear(d->redTRC) && Value[0]<1.0) {
TRCtriplet[0] = cmsEvalToneCurve16(d->redTRC, TRCtriplet[0]);
Value[0] = TRCtriplet[0]/65535.0;
}
if (!cmsIsToneCurveLinear(d->greenTRC) && Value[1]<1.0) {
TRCtriplet[1] = cmsEvalToneCurve16(d->greenTRC, TRCtriplet[1]);
Value[1] = TRCtriplet[1]/65535.0;
}
if (!cmsIsToneCurveLinear(d->blueTRC) && Value[2]<1.0) {
TRCtriplet[2] = cmsEvalToneCurve16(d->blueTRC, TRCtriplet[2]);
Value[2] = TRCtriplet[2]/65535.0;
}
} else {
if (cmsIsTag(d->profile, cmsSigGrayTRCTag) && Value[0]<1.0) {
TRCtriplet[0] = (cmsEvalToneCurve16(d->grayTRC, Value[0]*65535));
Value.fill(TRCtriplet[0]/65535.0);
}
}
}
void LcmsColorProfileContainer::DelinearizeFloatValueFast(QVector <double> & Value) const
{
const qreal scale = 65535.0;
const qreal invScale = 1.0 / scale;
if (d->hasColorants) {
//we can only reliably delinearise in the 0-1.0 range, outside of that leave the value alone.
QVector <quint16> TRCtriplet(3);
TRCtriplet[0] = Value[0] * scale;
TRCtriplet[1] = Value[1] * scale;
TRCtriplet[2] = Value[2] * scale;
if (!cmsIsToneCurveLinear(d->redTRC) && Value[0]<1.0) {
TRCtriplet[0] = cmsEvalToneCurve16(d->redTRCReverse, TRCtriplet[0]);
Value[0] = TRCtriplet[0] * invScale;
}
if (!cmsIsToneCurveLinear(d->greenTRC) && Value[1]<1.0) {
TRCtriplet[1] = cmsEvalToneCurve16(d->greenTRCReverse, TRCtriplet[1]);
Value[1] = TRCtriplet[1] * invScale;
}
if (!cmsIsToneCurveLinear(d->blueTRC) && Value[2]<1.0) {
TRCtriplet[2] = cmsEvalToneCurve16(d->blueTRCReverse, TRCtriplet[2]);
Value[2] = TRCtriplet[2] * invScale;
}
} else {
if (cmsIsTag(d->profile, cmsSigGrayTRCTag) && Value[0]<1.0) {
quint16 newValue = cmsEvalToneCurve16(d->grayTRCReverse, Value[0] * scale);
Value[0] = newValue * invScale;
}
}
}
// We need accuracy this time
cmsFloat32Number CMSEXPORT cmsEvalToneCurveFloat(const cmsToneCurve* Curve, cmsFloat32Number v)
{
_cmsAssert(Curve != NULL);
// Check for 16 bits table. If so, this is a limited-precision tone curve
if (Curve ->nSegments == 0) {
cmsUInt16Number In, Out;
In = (cmsUInt16Number) _cmsQuickSaturateWord(v * 65535.0);
Out = cmsEvalToneCurve16(Curve, In);
return (cmsFloat32Number) (Out / 65535.0);
}
return (cmsFloat32Number) EvalSegmentedFn(Curve, v);
}
// Preserve black only if that is the only ink used
static
int BlackPreservingGrayOnlySampler(register const cmsUInt16Number In[], register cmsUInt16Number Out[], register void* Cargo)
{
GrayOnlyParams* bp = (GrayOnlyParams*) Cargo;
// If going across black only, keep black only
if (In[0] == 0 && In[1] == 0 && In[2] == 0) {
// TAC does not apply because it is black ink!
Out[0] = Out[1] = Out[2] = 0;
Out[3] = cmsEvalToneCurve16(bp->KTone, In[3]);
return TRUE;
}
// Keep normal transform for other colors
bp ->cmyk2cmyk ->Eval16Fn(In, Out, bp ->cmyk2cmyk->Data);
return TRUE;
}
