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Unification if sRGB gamma value

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see issue 856
This commit is contained in:
Oliver Duis
2011-07-27 19:16:26 +02:00
parent 244caeff9a
commit 5aeb290622
6 changed files with 30 additions and 17 deletions
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13
rtgui/navigator.cc
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@@ -20,6 +20,7 @@
#include <toolpanel.h>
#include <iccmatrices.h> // from rtengine
#include <iccstore.h>
#include <curves.h>
#define D50x 0.96422
#define D50z 0.82521
@@ -164,9 +165,9 @@ void Navigator::rgb2lab (Glib::ustring profile, int r, int g, int b, int &LAB_l,
double ep=216.0/24389.0;
double ka=24389.0/27.0;
volatile double var_R = r / 255.0;
volatile double var_G = g / 255.0;
volatile double var_B = b / 255.0;
double var_R = r / 255.0;
double var_G = g / 255.0;
double var_B = b / 255.0;
if (profile=="sRGB") {//apply sRGB inverse gamma
@@ -175,15 +176,15 @@ void Navigator::rgb2lab (Glib::ustring profile, int r, int g, int b, int &LAB_l,
// today as the gamma output can not be configured
// it is better that the user has the gamma of the output space
if ( var_R > 0.04045 )
var_R = pow ( ( ( var_R + 0.055 ) / 1.055 ), 2.4);
var_R = pow ( ( ( var_R + 0.055 ) / 1.055 ), rtengine::CurveFactory::sRGBGammaCurve);
else
var_R = var_R / 12.92;
if ( var_G > 0.04045 )
var_G = pow ( ( ( var_G + 0.055 ) / 1.055 ), 2.4);
var_G = pow ( ( ( var_G + 0.055 ) / 1.055 ), rtengine::CurveFactory::sRGBGammaCurve);
else
var_G = var_G / 12.92;
if ( var_B > 0.04045 )
var_B = pow ( ( ( var_B + 0.055 ) / 1.055 ), 2.4);
var_B = pow ( ( ( var_B + 0.055 ) / 1.055 ), rtengine::CurveFactory::sRGBGammaCurve);
else
var_B = var_B / 12.92;
}