ColorCorrecterBase(OFX::ImageEffect &instance,const OFX::RenderArguments &args)
: OFX::ImageProcessor(instance)
, _srcImg(0)
, _maskImg(0)
, _premult(false)
, _premultChannel(3)
, _doMasking(false)
, _mix(1.)
, _maskInvert(false)
{
// build the LUT
OFX::ParametricParam *lookupTable = instance.fetchParametricParam(kParamColorCorrectToneRanges);
assert(lookupTable);
for (int curve = 0; curve < 2; ++curve) {
for (int position = 0; position <= LUT_MAX_PRECISION; ++position) {
// position to evaluate the param at
double parametricPos = double(position)/LUT_MAX_PRECISION;
// evaluate the parametric param
double value = lookupTable->getValue(curve, args.time, parametricPos);
// set that in the lut
_lookupTable[curve][position] = (float)std::max(0.,std::min(value*LUT_MAX_PRECISION+0.5, double(LUT_MAX_PRECISION)));
}
}
}
ColorCorrecter(OFX::ImageEffect &instance, const OFX::RenderArguments &args, bool supportsParametricParameter)
: ColorCorrecterBase(instance,args)
{
// build the LUT
OFX::ParametricParam *lookupTable = 0;
if (supportsParametricParameter) {
lookupTable = instance.fetchParametricParam(kParamColorCorrectToneRanges);
}
for (int curve = 0; curve < 2; ++curve) {
for (int position = 0; position <= LUT_MAX_PRECISION; ++position) {
// position to evaluate the param at
double parametricPos = double(position)/LUT_MAX_PRECISION;
// evaluate the parametric param
double value;
if (lookupTable) {
value = lookupTable->getValue(curve, args.time, parametricPos);
} else if (curve == 0) {
if (parametricPos < 0.09) {
value = 1. - parametricPos/0.09;
} else {
value = 0.;
}
} else {
assert(curve == 1);
if (parametricPos <= 0.5) {
value = 0.;
} else {
value = (parametricPos - 0.5) / 0.5;
}
}
// set that in the lut
_lookupTable[curve][position] = (float)clamp<PIX>(value, maxValue);
}
}
}