From 4186c2b1394a33ffe58cc6cfec99de6e0420c816 Mon Sep 17 00:00:00 2001
From: Alberto Griggio <agriggio@users.noreply.github.com>
Date: Fri, 2 Nov 2018 13:47:09 +0100
Subject: [PATCH] L*a*b* grid color toning: fixed scaling bug introduced in
 74a467fb4e20aca7b9b9ba40eefa405f0d32e2c4

---
 rtengine/improcfun.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/rtengine/improcfun.cc b/rtengine/improcfun.cc
index 4dd745eb6..31c44efe4 100644
--- a/rtengine/improcfun.cc
+++ b/rtengine/improcfun.cc
@@ -5782,8 +5782,8 @@ void ImProcFunctions::lab2rgb (const LabImage &src, Imagefloat &dst, const Glib:
 */
 void ImProcFunctions::colorToningLabGrid(LabImage *lab, int xstart, int xend, int ystart, int yend, bool MultiThread)
 {
-    const float factor = 3.f;
-    const float scaling = 3.f;
+    const float factor = ColorToningParams::LABGRID_CORR_MAX * 3.f;
+    const float scaling = ColorToningParams::LABGRID_CORR_SCALE;
     float a_scale = (params->colorToning.labgridAHigh - params->colorToning.labgridALow) / factor / scaling;
     float a_base = params->colorToning.labgridALow / scaling;
     float b_scale = (params->colorToning.labgridBHigh - params->colorToning.labgridBLow) / factor / scaling;