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Optimization for float-version of ciecam, Issue 1761

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Ingo 2013-03-14 14:00:04 +01:00
parent 5afb5bc182
commit 8abba2a6e1
2 changed files with 10 additions and 9 deletions
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13
rtengine/colortemp.cc
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@ -25,6 +25,7 @@
#include <stdio.h>
#include <stdlib.h>
#include "mytime.h"
#include "sleef.c"
#undef CLIPD
#define CLIPD(a) ((a)>0.0?((a)<1.0?(a):1.0):0.0)
#define CLIPQQ(a) ((a)>0?((a)<250?(a):250):0)
@ -1879,9 +1880,9 @@ void ColorTemp::calculate_ab( double &aa, double &bb, double h, double e, doubl
}
void ColorTemp::calculate_abfloat( float &aa, float &bb, float h, float e, float t, float nbb, float a )
{
float hrad = (h * M_PI) / 180.0f;
float sinh = sin( hrad );
float cosh = cos( hrad );
float2 sincosval = xsincosf((h * M_PI) / 180.0f);
float sinh = sincosval.x;
float cosh = sincosval.y;
float x = (a / nbb) + 0.305f;
float p3 = 21.0f/20.0f;
if( fabs( sinh ) >= fabs( cosh ) ) {
@ -2078,7 +2079,7 @@ void ColorTemp::xyz2jchqms_ciecam02float( float &J, float &C, float &h, float &Q
ca = rpa - ((12.0f * gpa) / 11.0f) + (bpa / 11.0f);
cb = (1.0f / 9.0f) * (rpa + gpa - (2.0f * bpa));
myh = (180.0f / M_PI) * atan2( cb, ca );
myh = (180.0f / M_PI) * xatan2f( cb, ca );
if( myh < 0.0f ) myh += 360.0f;
//we can also calculate H, if necessary...but it's using time...for what usage ?
/*double temp;
@ -2107,7 +2108,7 @@ void ColorTemp::xyz2jchqms_ciecam02float( float &J, float &C, float &h, float &Q
if (gamu==1) a=MAXR(a,0.0f);//gamut correction M.H.Brill S.Susstrunk
J = 100.0f * pow_F( a / aw, c * cz );
e = ((12500.0f / 13.0f) * nc * ncb) * (cos( ((myh * M_PI) / 180.0f) + 2.0f ) + 3.8f);
e = ((12500.0f / 13.0f) * nc * ncb) * (xcosf( ((myh * M_PI) / 180.0f) + 2.0f ) + 3.8f);
t = (e * sqrt( (ca * ca) + (cb * cb) )) / (rpa + gpa + ((21.0f / 20.0f) * bpa));
C = pow_F( t, 0.9f ) * sqrt( J / 100.0f )
@ -2169,7 +2170,7 @@ void ColorTemp::jch2xyz_ciecam02float( float &x, float &y, float &z, float J, fl
float e, t;
gamu=1;
ColorTemp::xyz_to_cat02float( rw, gw, bw, xw, yw, zw, gamu );
e = ((12500.0f / 13.0f) * nc * ncb) * (cos( ((h * M_PI) / 180.0f) + 2.0f ) + 3.8f);
e = ((12500.0f / 13.0f) * nc * ncb) * (xcosf( ((h * M_PI) / 180.0f) + 2.0f ) + 3.8f);
a = pow_F( J / 100.0f, 1.0f / (c * cz) ) * aw;
t = pow_F( C / (sqrt( J / 100.f) * pow_F( 1.64f - pow_F( 0.29f, n ), 0.73f )), 10.0f / 9.0f );

6
rtengine/colortemp.h
View File

@ -21,10 +21,10 @@
#include <gtkmm.h>
#include <cmath>
#include "colortemp.h"
#include "sleef.c"
#include "LUT.h"
#define MAXR(a,b) ((a) > (b) ? (a) : (b))
#define pow_F(a,b) (exp(b*log(a)))
#define pow_F(a,b) (xexpf(b*xlogf(a)))
namespace rtengine {
@ -68,7 +68,7 @@ class ColorTemp {
return f * (1.0 - ((1.0 / 3.6) * exp((-la - 42.0) / 92.0)));
}
static float d_factorfloat( float f, float la ) {
return f * (1.0f - ((1.0f / 3.6f) * exp((-la - 42.0f) / 92.0f)));
return f * (1.0f - ((1.0f / 3.6f) * xexpf((-la - 42.0f) / 92.0f)));
}
static double calculate_fl_from_la_ciecam02( double la ) {