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Added new color toning method "L*a*b* regions"

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Allows to specify various "regions" of the image with masks, and to correct
for hue, saturation and lightness.

Inspired by the existing L*a*b* grid (in turn taken from darktable)
This commit is contained in:
Alberto Griggio
2018-10-25 16:46:11 +02:00
parent eee6837385
commit 1a3fd9f157
18 changed files with 854 additions and 32 deletions
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375
rtgui/colortoning.cc
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@@ -11,6 +11,8 @@ using namespace rtengine;
using namespace rtengine::procparams;
static constexpr int ID_LABREGION_HUE = 5;
ColorToning::ColorToning () : FoldableToolPanel(this, "colortoning", M("TP_COLORTONING_LABEL"), false, true)
{
nextbw = 0;
@@ -25,6 +27,7 @@ ColorToning::ColorToning () : FoldableToolPanel(this, "colortoning", M("TP_COLOR
method->append (M("TP_COLORTONING_SPLITCOCO"));
method->append (M("TP_COLORTONING_SPLITLR"));
method->append(M("TP_COLORTONING_LABGRID"));
method->append(M("TP_COLORTONING_LABREGIONS"));
method->set_active (0);
method->set_tooltip_text (M("TP_COLORTONING_METHOD_TOOLTIP"));
@@ -321,7 +324,7 @@ ColorToning::ColorToning () : FoldableToolPanel(this, "colortoning", M("TP_COLOR
auto m = ProcEventMapper::getInstance();
EvColorToningLabGridValue = m->newEvent(RGBCURVE, "HISTORY_MSG_COLORTONING_LABGRID_VALUE");
labgridBox = Gtk::manage(new Gtk::HBox());
labgrid = Gtk::manage(new LabGrid(EvColorToningLabGridValue));
labgrid = Gtk::manage(new LabGrid(EvColorToningLabGridValue, M("TP_COLORTONING_LABGRID_VALUES")));
labgridBox->pack_start(*labgrid, true, true);
labgridReset = Gtk::manage(new Gtk::Button ());
labgridReset->add (*Gtk::manage(new RTImage ("undo-small.png", "redo-small.png")));
@@ -336,6 +339,116 @@ ColorToning::ColorToning () : FoldableToolPanel(this, "colortoning", M("TP_COLOR
pack_start(*labgridBox, Gtk::PACK_EXPAND_WIDGET, 4);
//------------------------------------------------------------------------
//------------------------------------------------------------------------
// LAB regions
const auto add_button =
[&](Gtk::Button *btn, Gtk::Box *box) -> void
{
setExpandAlignProperties(btn, false, false, Gtk::ALIGN_CENTER, Gtk::ALIGN_START);
btn->set_relief(Gtk::RELIEF_NONE);
btn->get_style_context()->add_class(GTK_STYLE_CLASS_FLAT);
btn->set_can_focus(false);
btn->set_size_request(-1, 20);
box->pack_start(*btn, false, false);
};
EvLabRegionList = m->newEvent(LUMINANCECURVE, "HISTORY_MSG_COLORTONING_LABREGION_LIST");
EvLabRegionAB = m->newEvent(LUMINANCECURVE, "HISTORY_MSG_COLORTONING_LABREGION_AB");
EvLabRegionSaturation = m->newEvent(LUMINANCECURVE, "HISTORY_MSG_COLORTONING_LABREGION_SATURATION");
EvLabRegionLightness = m->newEvent(LUMINANCECURVE, "HISTORY_MSG_COLORTONING_LABREGION_LIGHTNESS");
EvLabRegionHueMask = m->newEvent(LUMINANCECURVE, "HISTORY_MSG_COLORTONING_LABREGION_HUEMASK");
EvLabRegionChromaticityMask = m->newEvent(LUMINANCECURVE, "HISTORY_MSG_COLORTONING_LABREGION_CHROMATICITYMASK");
EvLabRegionLightnessMask = m->newEvent(LUMINANCECURVE, "HISTORY_MSG_COLORTONING_LABREGION_LIGHTNESSMASK");
EvLabRegionShowMask = m->newEvent(LUMINANCECURVE, "HISTORY_MSG_COLORTONING_LABREGION_SHOWMASK");
labRegionBox = Gtk::manage(new Gtk::VBox());
labRegionList = Gtk::manage(new Gtk::ListViewText(3));
labRegionList->set_size_request(-1, 100);
labRegionList->set_column_title(0, "#");
labRegionList->set_column_title(1, M("TP_COLORTONING_LABREGION_LIST_TITLE"));
labRegionList->set_column_title(2, M("TP_COLORTONING_LABREGION_MASK"));
labRegionList->set_activate_on_single_click(true);
labRegionSelectionConn = labRegionList->get_selection()->signal_changed().connect(sigc::mem_fun(this, &ColorToning::onLabRegionSelectionChanged));
Gtk::HBox *hb = Gtk::manage(new Gtk::HBox());
hb->pack_start(*labRegionList, Gtk::PACK_EXPAND_WIDGET);
Gtk::VBox *vb = Gtk::manage(new Gtk::VBox());
labRegionAdd = Gtk::manage(new Gtk::Button());
labRegionAdd->add(*Gtk::manage(new RTImage("add-small.png")));
labRegionAdd->signal_clicked().connect(sigc::mem_fun(*this, &ColorToning::labRegionAddPressed));
add_button(labRegionAdd, vb);
labRegionRemove = Gtk::manage(new Gtk::Button());
labRegionRemove->add(*Gtk::manage(new RTImage("remove-small.png")));
labRegionRemove->signal_clicked().connect(sigc::mem_fun(*this, &ColorToning::labRegionRemovePressed));
add_button(labRegionRemove, vb);
labRegionUp = Gtk::manage(new Gtk::Button());
labRegionUp->add(*Gtk::manage(new RTImage("arrow-up-small.png")));
labRegionUp->signal_clicked().connect(sigc::mem_fun(*this, &ColorToning::labRegionUpPressed));
add_button(labRegionUp, vb);
labRegionDown = Gtk::manage(new Gtk::Button());
labRegionDown->add(*Gtk::manage(new RTImage("arrow-down-small.png")));
labRegionDown->signal_clicked().connect(sigc::mem_fun(*this, &ColorToning::labRegionDownPressed));
add_button(labRegionDown, vb);
hb->pack_start(*vb, Gtk::PACK_SHRINK);
labRegionBox->pack_start(*hb, true, true);
labRegionAB = Gtk::manage(new LabGrid(EvLabRegionAB, M("TP_COLORTONING_LABREGION_ABVALUES"), false));
hb = Gtk::manage(new Gtk::HBox());
hb->pack_start(*labRegionAB, true, true);
labRegionABReset = Gtk::manage(new Gtk::Button());
labRegionABReset->set_tooltip_markup(M("ADJUSTER_RESET_TO_DEFAULT"));
labRegionABReset->add(*Gtk::manage(new RTImage("undo-small.png", "redo-small.png")));
labRegionABReset->signal_button_release_event().connect(sigc::mem_fun(*this, &ColorToning::labRegionResetPressed));
add_button(labRegionABReset, hb);
labRegionBox->pack_start(*hb);
labRegionSaturation = Gtk::manage(new Adjuster(M("TP_COLORTONING_LABREGION_SATURATION"), -100, 100, 1, 0));
labRegionSaturation->setAdjusterListener(this);
labRegionBox->pack_start(*labRegionSaturation);
labRegionLightness = Gtk::manage(new Adjuster(M("TP_COLORTONING_LABREGION_LIGHTNESS"), -100, 100, 1, 0));
labRegionLightness->setAdjusterListener(this);
labRegionBox->pack_start(*labRegionLightness);
CurveEditorGroup *labRegionEditorG = Gtk::manage(new CurveEditorGroup(options.lastColorToningCurvesDir, M("TP_COLORTONING_LABREGION_MASK")));
labRegionEditorG->setCurveListener(this);
labRegionHueMask = static_cast<FlatCurveEditor *>(labRegionEditorG->addCurve(CT_Flat, M("TP_COLORTONING_LABREGION_HUEMASK"), nullptr, false, true));
labRegionHueMask->setIdentityValue(0.);
labRegionHueMask->setResetCurve(FlatCurveType(default_params.labregions[0].hueMask[0]), default_params.labregions[0].hueMask);
labRegionHueMask->setCurveColorProvider(this, ID_LABREGION_HUE);
labRegionHueMask->setBottomBarColorProvider(this, ID_LABREGION_HUE);
labRegionHueMask->setEditID(EUID_Lab_HHCurve, BT_SINGLEPLANE_FLOAT);
labRegionChromaticityMask = static_cast<FlatCurveEditor *>(labRegionEditorG->addCurve(CT_Flat, M("TP_COLORTONING_LABREGION_CHROMATICITYMASK"), nullptr, false, false));
labRegionChromaticityMask->setIdentityValue(0.);
labRegionChromaticityMask->setResetCurve(FlatCurveType(default_params.labregions[0].chromaticityMask[0]), default_params.labregions[0].chromaticityMask);
labRegionChromaticityMask->setBottomBarColorProvider(this, ID_LABREGION_HUE+1);
labRegionChromaticityMask->setEditID(EUID_Lab_CCurve, BT_SINGLEPLANE_FLOAT);
labRegionLightnessMask = static_cast<FlatCurveEditor *>(labRegionEditorG->addCurve(CT_Flat, M("TP_COLORTONING_LABREGION_LIGHTNESSMASK"), nullptr, false, false));
labRegionLightnessMask->setIdentityValue(0.);
labRegionLightnessMask->setResetCurve(FlatCurveType(default_params.labregions[0].lightnessMask[0]), default_params.labregions[0].lightnessMask);
labRegionLightnessMask->setBottomBarBgGradient(milestones);
labRegionLightnessMask->setEditID(EUID_Lab_LCurve, BT_SINGLEPLANE_FLOAT);
labRegionData = default_params.labregions;
labRegionSelected = 0;
{
auto n = labRegionList->append("1");
labRegionList->set_text(n, 1, "a=0 b=0 s=0 l=0");
}
labRegionEditorG->curveListComplete();
labRegionEditorG->show();
labRegionBox->pack_start(*labRegionEditorG, Gtk::PACK_SHRINK, 2);
labRegionShowMask = Gtk::manage(new Gtk::CheckButton(M("TP_COLORTONING_LABREGION_SHOWMASK")));
labRegionShowMask->signal_toggled().connect(sigc::mem_fun(*this, &ColorToning::labRegionShowMaskChanged));
labRegionBox->pack_start(*labRegionShowMask, Gtk::PACK_SHRINK, 4);
pack_start(*labRegionBox, Gtk::PACK_EXPAND_WIDGET, 4);
//------------------------------------------------------------------------
show_all();
disableListener();
@@ -358,6 +471,7 @@ void ColorToning::setListener(ToolPanelListener *tpl)
{
ToolPanel::setListener(tpl);
labgrid->setListener(tpl);
labRegionAB->setListener(tpl);
}
/*
@@ -409,6 +523,20 @@ void ColorToning::read (const ProcParams* pp, const ParamsEdited* pedited)
clshape->setCurve (pp->colorToning.clcurve);
cl2shape->setCurve (pp->colorToning.cl2curve);
labRegionData = pp->colorToning.labregions;
if (labRegionData.empty()) {
labRegionData.emplace_back(rtengine::ColorToningParams::LabCorrectionRegion());
}
if (pp->colorToning.labregionsShowMask >= 0) {
labRegionSelected = pp->colorToning.labregionsShowMask;
labRegionShowMask->set_active(true);
} else {
labRegionSelected = 0;
labRegionShowMask->set_active(false);
}
labRegionPopulateList();
labRegionShow(labRegionSelected);
if (pedited) {
redlow->setEditedState (pedited->colorToning.redlow ? Edited : UnEdited);
greenlow->setEditedState (pedited->colorToning.greenlow ? Edited : UnEdited);
@@ -433,6 +561,9 @@ void ColorToning::read (const ProcParams* pp, const ParamsEdited* pedited)
lumamode->set_inconsistent (!pedited->colorToning.lumamode);
labgrid->setEdited(pedited->colorToning.labgridALow || pedited->colorToning.labgridBLow || pedited->colorToning.labgridAHigh || pedited->colorToning.labgridBHigh);
labRegionAB->setEdited(pedited->colorToning.labregions);
labRegionShowMask->set_inconsistent(!pedited->colorToning.labregionsShowMask);
}
redlow->setValue (pp->colorToning.redlow);
@@ -480,6 +611,8 @@ void ColorToning::read (const ProcParams* pp, const ParamsEdited* pedited)
method->set_active (4);
} else if (pp->colorToning.method == "LabGrid") {
method->set_active(5);
} else if (pp->colorToning.method == "LabRegions") {
method->set_active(6);
}
methodChanged();
@@ -534,6 +667,15 @@ void ColorToning::write (ProcParams* pp, ParamsEdited* pedited)
labgrid->getParams(pp->colorToning.labgridALow, pp->colorToning.labgridBLow, pp->colorToning.labgridAHigh, pp->colorToning.labgridBHigh);
labRegionGet(labRegionSelected);
labRegionShow(labRegionSelected, true);
pp->colorToning.labregions = labRegionData;
if (labRegionShowMask->get_active()) {
pp->colorToning.labregionsShowMask = labRegionSelected;
} else {
pp->colorToning.labregionsShowMask = -1;
}
if (pedited) {
pedited->colorToning.redlow = redlow->getEditedState ();
pedited->colorToning.greenlow = greenlow->getEditedState ();
@@ -560,6 +702,9 @@ void ColorToning::write (ProcParams* pp, ParamsEdited* pedited)
pedited->colorToning.shadowsColSat = shadowsColSat->getEditedState ();
pedited->colorToning.labgridALow = pedited->colorToning.labgridBLow = pedited->colorToning.labgridAHigh = pedited->colorToning.labgridBHigh = labgrid->getEdited();
pedited->colorToning.labregions = labRegionAB->getEdited();
pedited->colorToning.labregionsShowMask = !labRegionShowMask->get_inconsistent();
}
if (method->get_active_row_number() == 0) {
@@ -574,6 +719,8 @@ void ColorToning::write (ProcParams* pp, ParamsEdited* pedited)
pp->colorToning.method = "Splitlr";
} else if (method->get_active_row_number() == 5) {
pp->colorToning.method = "LabGrid";
} else if (method->get_active_row_number() == 6) {
pp->colorToning.method = "LabRegions";
}
if (twocolor->get_active_row_number() == 0) {
@@ -631,6 +778,7 @@ void ColorToning::setDefaults (const ProcParams* defParams, const ParamsEdited*
shadowsColSat->setDefault<int> (defParams->colorToning.shadowsColSat);
strength->setDefault (defParams->colorToning.strength);
labgrid->setDefault(defParams->colorToning.labgridALow, defParams->colorToning.labgridBLow, defParams->colorToning.labgridAHigh, defParams->colorToning.labgridBHigh);
if (pedited) {
redlow->setDefaultEditedState (pedited->colorToning.redlow ? Edited : UnEdited);
@@ -649,6 +797,8 @@ void ColorToning::setDefaults (const ProcParams* defParams, const ParamsEdited*
shadowsColSat->setDefaultEditedState (pedited->colorToning.shadowsColSat ? Edited : UnEdited);
strength->setDefaultEditedState (pedited->colorToning.strength ? Edited : UnEdited);
labgrid->setEdited((pedited->colorToning.labgridALow || pedited->colorToning.labgridBLow || pedited->colorToning.labgridAHigh || pedited->colorToning.labgridBHigh) ? Edited : UnEdited);
labRegionAB->setEdited(pedited->colorToning.labregions ? Edited : UnEdited);
} else {
redlow->setDefaultEditedState (Irrelevant);
greenlow->setDefaultEditedState (Irrelevant);
@@ -666,6 +816,7 @@ void ColorToning::setDefaults (const ProcParams* defParams, const ParamsEdited*
shadowsColSat->setDefaultEditedState (Irrelevant);
strength->setDefaultEditedState (Irrelevant);
labgrid->setEdited(Edited);
labRegionAB->setEdited(Edited);
}
}
@@ -814,6 +965,7 @@ void ColorToning::methodChanged ()
if (!batchMode) {
labgridBox->hide();
labRegionBox->hide();
if (method->get_active_row_number() == 0) { // Lab
colorSep->show();
@@ -962,7 +1114,7 @@ void ColorToning::methodChanged ()
chanMixerBox->hide();
neutrHBox->hide();
lumamode->show();
} else if (method->get_active_row_number() == 5) { // Lab Grid
} else if (method->get_active_row_number() == 5 || method->get_active_row_number() == 6) { // Lab Grid or Lab Regions
colorSep->hide();
colorCurveEditorG->hide();
twocolor->hide();
@@ -981,7 +1133,11 @@ void ColorToning::methodChanged ()
neutrHBox->hide();
lumamode->hide();
labgridBox->show();
if (method->get_active_row_number() == 5) {
labgridBox->show();
} else {
labRegionBox->show();
}
}
}
@@ -1038,6 +1194,17 @@ void ColorToning::colorForValue (double valX, double valY, enum ColorCaller::Ele
}
} else if (callerId == 4) { // color curve vertical and horizontal crosshair
Color::hsv2rgb01(float(valY), 1.0f, 0.5f, R, G, B);
} else if (callerId == ID_LABREGION_HUE) {
// TODO
float x = valX - 1.f/6.f;
if (x < 0.f) {
x += 1.f;
}
x = log2lin(x, 3.f);
// float x = valX;
Color::hsv2rgb01(x, 0.5f, 0.5f, R, G, B);
} else if (callerId == ID_LABREGION_HUE+1) {
Color::hsv2rgb01(float(valY), float(valX), 0.5f, R, G, B);
}
caller->ccRed = double(R);
@@ -1057,6 +1224,12 @@ void ColorToning::curveChanged (CurveEditor* ce)
listener->panelChanged (EvColorToningCLCurve, M("HISTORY_CUSTOMCURVE"));
} else if (ce == cl2shape) {
listener->panelChanged (EvColorToningLLCurve, M("HISTORY_CUSTOMCURVE"));
} else if (ce == labRegionHueMask) {
listener->panelChanged(EvLabRegionHueMask, M("HISTORY_CUSTOMCURVE"));
} else if (ce == labRegionChromaticityMask) {
listener->panelChanged(EvLabRegionChromaticityMask, M("HISTORY_CUSTOMCURVE"));
} else if (ce == labRegionLightnessMask) {
listener->panelChanged(EvLabRegionLightnessMask, M("HISTORY_CUSTOMCURVE"));
}
}
}
@@ -1158,6 +1331,10 @@ void ColorToning::adjusterChanged(Adjuster* a, double newval)
listener->panelChanged (EvColorToningSatProtection, a->getTextValue());
} else if (a == strength) {
listener->panelChanged (EvColorToningStrength, a->getTextValue());
} else if (a == labRegionSaturation) {
listener->panelChanged(EvLabRegionSaturation, a->getTextValue());
} else if (a == labRegionLightness) {
listener->panelChanged(EvLabRegionLightness, a->getTextValue());
}
}
@@ -1195,3 +1372,195 @@ bool ColorToning::resetPressed(GdkEventButton* event)
labgrid->reset(event->state & GDK_CONTROL_MASK);
return false;
}
bool ColorToning::labRegionResetPressed(GdkEventButton *event)
{
labRegionAB->reset(event->state & GDK_CONTROL_MASK);
return false;
}
void ColorToning::onLabRegionSelectionChanged()
{
auto s = labRegionList->get_selected();
if (!s.empty()) {
// update the selected values
labRegionGet(labRegionSelected);
labRegionSelected = s[0];
labRegionShow(labRegionSelected);
if (labRegionShowMask->get_active()) {
labRegionShowMaskChanged();
}
}
}
void ColorToning::labRegionGet(int idx)
{
auto &r = labRegionData[idx];
double la, lb;
labRegionAB->getParams(la, lb, r.a, r.b);
r.saturation = labRegionSaturation->getValue();
r.lightness = labRegionLightness->getValue();
r.hueMask = labRegionHueMask->getCurve();
r.chromaticityMask = labRegionChromaticityMask->getCurve();
r.lightnessMask = labRegionLightnessMask->getCurve();
}
void ColorToning::labRegionAddPressed()
{
labRegionData.insert(labRegionData.begin(), rtengine::ColorToningParams::LabCorrectionRegion());
labRegionSelected = 0;
labRegionPopulateList();
labRegionShow(labRegionSelected);
if (listener) {
listener->panelChanged(EvLabRegionList, M("HISTORY_CHANGED"));
}
}
void ColorToning::labRegionRemovePressed()
{
if (labRegionList->size() > 1) {
labRegionData.erase(labRegionData.begin() + labRegionSelected);
labRegionSelected = LIM(labRegionSelected-1, 0, int(labRegionData.size()-1));
labRegionPopulateList();
labRegionShow(labRegionSelected);
if (listener) {
listener->panelChanged(EvLabRegionList, M("HISTORY_CHANGED"));
}
}
}
void ColorToning::labRegionUpPressed()
{
if (labRegionSelected > 0) {
auto r = labRegionData[labRegionSelected];
labRegionData.erase(labRegionData.begin() + labRegionSelected);
--labRegionSelected;
labRegionData.insert(labRegionData.begin() + labRegionSelected, r);
labRegionPopulateList();
if (listener) {
listener->panelChanged(EvLabRegionList, M("HISTORY_CHANGED"));
}
}
}
void ColorToning::labRegionDownPressed()
{
if (labRegionSelected < int(labRegionData.size()-1)) {
auto r = labRegionData[labRegionSelected];
labRegionData.erase(labRegionData.begin() + labRegionSelected);
++labRegionSelected;
labRegionData.insert(labRegionData.begin() + labRegionSelected, r);
labRegionPopulateList();
if (listener) {
listener->panelChanged(EvLabRegionList, M("HISTORY_CHANGED"));
}
}
}
void ColorToning::labRegionShowMaskChanged()
{
if (listener) {
listener->panelChanged(EvLabRegionShowMask, labRegionShowMask->get_active() ? M("GENERAL_ENABLED") : M("GENERAL_DISABLED"));
}
}
namespace {
bool hasMask(const std::vector<double> &dflt, const std::vector<double> &mask)
{
if (mask.empty() || mask[0] == FCT_Linear || mask == dflt) {
return false;
} else {
return true;
}
}
} // namespace
void ColorToning::labRegionPopulateList()
{
ConnectionBlocker b(labRegionSelectionConn);
labRegionList->clear_items();
rtengine::ColorToningParams::LabCorrectionRegion dflt;
for (size_t i = 0; i < labRegionData.size(); ++i) {
auto &r = labRegionData[i];
auto j = labRegionList->append(std::to_string(i+1));
labRegionList->set_text(j, 1, Glib::ustring::compose("a=%1 b=%2 s=%3 l=%4", int(r.a), int(r.b), r.saturation, r.lightness));
labRegionList->set_text(
j, 2, Glib::ustring::compose(
"%1%2%3",
hasMask(dflt.hueMask, r.hueMask) ? "H" : "",
hasMask(dflt.chromaticityMask, r.chromaticityMask) ? "C" : "",
hasMask(dflt.lightnessMask, r.lightnessMask) ? "L" : ""));
}
}
void ColorToning::labRegionShow(int idx, bool list_only)
{
bool disable = listener;
if (disable) {
disableListener();
}
rtengine::ColorToningParams::LabCorrectionRegion dflt;
auto &r = labRegionData[idx];
if (!list_only) {
labRegionAB->setParams(0, 0, r.a, r.b, false);
labRegionSaturation->setValue(r.saturation);
labRegionLightness->setValue(r.lightness);
labRegionHueMask->setCurve(r.hueMask);
labRegionChromaticityMask->setCurve(r.chromaticityMask);
labRegionLightnessMask->setCurve(r.lightnessMask);
}
labRegionList->set_text(idx, 1, Glib::ustring::compose("a=%1 b=%2 s=%3 l=%4", int(r.a), int(r.b), r.saturation, r.lightness));
labRegionList->set_text(
idx, 2, Glib::ustring::compose(
"%1%2%3",
hasMask(dflt.hueMask, r.hueMask) ? "H" : "",
hasMask(dflt.chromaticityMask, r.chromaticityMask) ? "C" : "",
hasMask(dflt.lightnessMask, r.lightnessMask) ? "L" : ""));
Gtk::TreePath pth;
pth.push_back(idx);
labRegionList->get_selection()->select(pth);
if (disable) {
enableListener();
}
}
void ColorToning::setEditProvider(EditDataProvider *provider)
{
labRegionHueMask->setEditProvider(provider);
labRegionChromaticityMask->setEditProvider(provider);
labRegionLightnessMask->setEditProvider(provider);
}
float ColorToning::blendPipetteValues(CurveEditor *ce, float chan1, float chan2, float chan3)
{
if (ce == labRegionChromaticityMask && chan1 > 0.f) {
return lin2log(chan1, 10.f);
} else if (ce == labRegionHueMask && chan1 > 0.f) {
float x = chan1 + 1.f/6.f;
if (x > 1.f) {
x -= 1.f;
}
return lin2log(x, 3.f);
}
return CurveListener::blendPipetteValues(ce, chan1, chan2, chan3);
}