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rawTherapee/rtengine/iplab2rgb.cc

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/*
* This file is part of RawTherapee.
*
* Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
*
* RawTherapee is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* RawTherapee is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with RawTherapee. If not, see <http://www.gnu.org/licenses/>.
*/
#include "rtengine.h"
#include "improcfun.h"
#include <glibmm.h>
#include "iccstore.h"
#include "iccmatrices.h"
#include "mytime.h"
#include "../rtgui/icmpanel.h"
#include "../rtgui/options.h"
#include "settings.h"
#include "curves.h"
#include "alignedbuffer.h"
#include "color.h"
#ifdef _OPENMP
#include <omp.h>
#endif
namespace rtengine {
#define CLIP01(a) ((a)>0?((a)<1?(a):1):0)
extern const Settings* settings;
const double (*wprof[])[3] = {xyz_sRGB, xyz_adobe, xyz_prophoto, xyz_widegamut, xyz_bruce, xyz_beta, xyz_best};
const double (*iwprof[])[3] = {sRGB_xyz, adobe_xyz, prophoto_xyz, widegamut_xyz, bruce_xyz, beta_xyz, best_xyz};
const char* wprofnames[] = {"sRGB", "Adobe RGB", "ProPhoto", "WideGamut", "BruceRGB", "Beta RGB", "BestRGB"};
const int numprof = 7;
void ImProcFunctions::lab2monitorRgb (LabImage* lab, Image8* image) {
//MyTime tBeg,tEnd;
// tBeg.set();
//gamutmap(lab);
if (monitorTransform) {
int W = lab->W;
int H = lab->H;
unsigned char * data = image->data;
// cmsDoTransform is relatively expensive
#ifdef _OPENMP
#pragma omp parallel firstprivate(lab, data, W, H)
#endif
{
AlignedBuffer<unsigned short> pBuf(3*lab->W);
unsigned short *buffer=pBuf.data;
#ifdef _OPENMP
#pragma omp for schedule(static)
#endif
for (int i=0; i<H; i++) {
// pre-conversion to integer, since the output is 8 bit anyway, but LCMS is MUCH faster not converting from float
const int ix = i * 3 * W;
int iy = 0;
float* rL = lab->L[i];
float* ra = lab->a[i];
float* rb = lab->b[i];
float fy,fx,fz,x_,y_,z_,LL;
for (int j=0; j<W; j++) {
fy = (0.00862069 * rL[j]) / 327.68 + 0.137932; // (L+16)/116
fx = (0.002 * ra[j]) / 327.68 + fy;
fz = fy - (0.005 * rb[j]) / 327.68;
LL=rL[j]/327.68;
x_ = Color::f2xyz(fx)*Color::D50x;
//y_ = Color::f2xyz(fy);
y_= (LL>Color::epskap) ? fy*fy*fy : LL/Color::kappa;
z_ = Color::f2xyz(fz)*Color::D50z;
buffer[iy++] = (unsigned short)CLIP(x_* MAXVALF+0.5);
buffer[iy++] = (unsigned short)CLIP(y_* MAXVALF+0.5);
buffer[iy++] = (unsigned short)CLIP(z_* MAXVALF+0.5);
}
cmsDoTransform (monitorTransform, buffer, data + ix, W);
} // End of parallelization
}
} else {
int W = lab->W;
int H = lab->H;
unsigned char * data = image->data;
//#ifdef _OPENMP
//#pragma omp parallel for schedule(static) firstprivate(lab, data, W, H) if (multiThread)
//#endif
for (int i=0; i<H; i++) {
float* rL = lab->L[i];
float* ra = lab->a[i];
float* rb = lab->b[i];
int ix = i * 3 * W;
float R,G,B;
float fy,fx,fz,x_,y_,z_,LL;
for (int j=0; j<W; j++) {
//float L1=rL[j],a1=ra[j],b1=rb[j];//for testing
fy = (0.00862069 * rL[j]) / 327.68 + 0.137932; // (L+16)/116
fx = (0.002 * ra[j]) / 327.68 + fy;
fz = fy - (0.005 * rb[j]) / 327.68;
LL=rL[j]/327.68;
x_ = 65535.0 * Color::f2xyz(fx)*Color::D50x;
// y_ = 65535.0 * Color::f2xyz(fy);
z_ = 65535.0 * Color::f2xyz(fz)*Color::D50z;
y_= (LL>Color::epskap) ? 65535.0*fy*fy*fy : 65535.0*LL/Color::kappa;
Color::xyz2srgb(x_,y_,z_,R,G,B);
/* copy RGB */
//int R1=((int)gamma2curve[(R)])
data[ix++] = ((int)gamma2curve[CLIP(R)]) >> 8;
data[ix++] = ((int)gamma2curve[CLIP(G)]) >> 8;
data[ix++] = ((int)gamma2curve[CLIP(B)]) >> 8;
}
}
}
//tEnd.set();
//printf("lab2rgb %i %d\n", lab->W, tEnd.etime(tBeg));
}
Image8* ImProcFunctions::lab2rgb (LabImage* lab, int cx, int cy, int cw, int ch, Glib::ustring profile, bool standard_gamma) {
//gamutmap(lab);
if (cx<0) cx = 0;
if (cy<0) cy = 0;
if (cx+cw>lab->W) cw = lab->W-cx;
if (cy+ch>lab->H) ch = lab->H-cy;
Image8* image = new Image8 (cw, ch);
cmsHPROFILE oprof = iccStore->getProfile (profile);
if (oprof) {
cmsHPROFILE oprofG = oprof;
if (standard_gamma) {
oprofG = ICCStore::makeStdGammaProfile(oprof);
}
cmsHPROFILE iprof = iccStore->getXYZProfile ();
lcmsMutex->lock ();
cmsHTRANSFORM hTransform = cmsCreateTransform (iprof, TYPE_RGB_16, oprofG, TYPE_RGB_8, settings->colorimetricIntent,
cmsFLAGS_NOOPTIMIZE | cmsFLAGS_NOCACHE ); // NOCACHE is important for thread safety
lcmsMutex->unlock ();
unsigned char *data = image->data;
// cmsDoTransform is relatively expensive
#ifdef _OPENMP
#pragma omp parallel
#endif
{
AlignedBuffer<unsigned short> pBuf(3*cw);
unsigned short *buffer=pBuf.data;
int condition = cy+ch;
#ifdef _OPENMP
#pragma omp for firstprivate(lab) schedule(static)
#endif
for (int i=cy; i<condition; i++) {
const int ix = i * 3 * cw;
int iy = 0;
float* rL = lab->L[i];
float* ra = lab->a[i];
float* rb = lab->b[i];
for (int j=cx; j<cx+cw; j++) {
float fy = (0.00862069 * rL[j])/327.68 + 0.137932; // (L+16)/116
float fx = (0.002 * ra[j])/327.68 + fy;
float fz = fy - (0.005 * rb[j])/327.68;
float LL=rL[j]/327.68;
float x_ = 65535.0 * Color::f2xyz(fx)*Color::D50x;
//float y_ = 65535.0 * Color::f2xyz(fy);
float z_ = 65535.0 * Color::f2xyz(fz)*Color::D50z;
float y_= (LL>Color::epskap) ? 65535.0*fy*fy*fy : 65535.0*LL/Color::kappa;
buffer[iy++] = CLIP((int)(x_+0.5));
buffer[iy++] = CLIP((int)(y_+0.5));
buffer[iy++] = CLIP((int)(z_+0.5));
}
cmsDoTransform (hTransform, buffer, data + ix, cw);
}
} // End of parallelization
cmsDeleteTransform(hTransform);
if (oprofG != oprof)
cmsCloseProfile(oprofG);
} else {
double rgb_xyz[3][3];
for (int i=0; i<numprof; i++) {
if (profile==wprofnames[i]) {
for (int m=0; m<3; m++)
for (int n=0; n<3; n++) {
rgb_xyz[m][n] = iwprof[i][m][n];
}
break;
}
}
#pragma omp parallel for if (multiThread)
for (int i=cy; i<cy+ch; i++) {
float R,G,B;
float* rL = lab->L[i];
float* ra = lab->a[i];
float* rb = lab->b[i];
int ix = 3*i*cw;
for (int j=cx; j<cx+cw; j++) {
float fy = (0.00862069 * rL[j])/327.68 + 0.137932; // (L+16)/116
float fx = (0.002 * ra[j])/327.68 + fy;
float fz = fy - (0.005 * rb[j])/327.68;
float LL=rL[j]/327.68;
float x_ = 65535.0 * Color::f2xyz(fx)*Color::D50x;
//float y_ = 65535.0 * Color::f2xyz(fy);
float z_ = 65535.0 * Color::f2xyz(fz)*Color::D50z;
float y_= (LL>Color::epskap) ? 65535.0*fy*fy*fy : 65535.0*LL/Color::kappa;
Color::xyz2rgb(x_,y_,z_,R,G,B,rgb_xyz);
image->data[ix++] = (int)gamma2curve[CLIP(R)] >> 8;
image->data[ix++] = (int)gamma2curve[CLIP(G)] >> 8;
image->data[ix++] = (int)gamma2curve[CLIP(B)] >> 8;
}
}
}
return image;
}
// for default (not gamma)
Image16* ImProcFunctions::lab2rgb16 (LabImage* lab, int cx, int cy, int cw, int ch, Glib::ustring profile, bool bw) {
//gamutmap(lab);
if (cx<0) cx = 0;
if (cy<0) cy = 0;
if (cx+cw>lab->W) cw = lab->W-cx;
if (cy+ch>lab->H) ch = lab->H-cy;
Image16* image = new Image16 (cw, ch);
cmsHPROFILE oprof = iccStore->getProfile (profile);
if (oprof) {
#pragma omp parallel for if (multiThread)
for (int i=cy; i<cy+ch; i++) {
float* rL = lab->L[i];
float* ra = lab->a[i];
float* rb = lab->b[i];
short* xa = (short*)image->r(i-cy);
short* ya = (short*)image->g(i-cy);
short* za = (short*)image->b(i-cy);
for (int j=cx; j<cx+cw; j++) {
float fy = (0.0086206897f * rL[j])/327.68f + 0.1379310345f; // (L+16)/116
float fx = (0.002 * ra[j])/327.68f + fy;
float fz = fy - (0.005f* rb[j])/327.68f;
float LL=rL[j]/327.68f;
float x_ = 65535.0f * (float) Color::f2xyz(fx)*Color::D50x;
//float y_ = 65535.0 * Color::f2xyz(fy);
float z_ = 65535.0f * (float) Color::f2xyz(fz)*Color::D50z;
float y_= (LL>Color::epskap) ? 65535.0f*fy*fy*fy : 65535.0f*LL/Color::kappa;
xa[j-cx] = CLIP((int) round(x_));
ya[j-cx] = CLIP((int) round(y_));
za[j-cx] = CLIP((int) round(z_));
if(bw && y_ < 65535.f ){//force Bw value and take highlight into account
xa[j-cx] =(int) round(y_* Color::D50x );
za[j-cx] =(int) round(y_* Color::D50z);
}
}
}
cmsHPROFILE iprof = iccStore->getXYZProfile ();
lcmsMutex->lock ();
cmsHTRANSFORM hTransform = cmsCreateTransform (iprof, TYPE_RGB_16, oprof, TYPE_RGB_16, settings->colorimetricIntent, cmsFLAGS_NOOPTIMIZE | cmsFLAGS_NOCACHE);
lcmsMutex->unlock ();
image->ExecCMSTransform(hTransform);
cmsDeleteTransform(hTransform);
} else {
#pragma omp parallel for if (multiThread)
for (int i=cy; i<cy+ch; i++) {
float R,G,B;
float* rL = lab->L[i];
float* ra = lab->a[i];
float* rb = lab->b[i];
for (int j=cx; j<cx+cw; j++) {
float fy = (0.0086206897f * rL[j])/327.68f + 0.1379310345f; // (L+16)/116
float fx = (0.002f * ra[j])/327.68f + fy;
float fz = fy - (0.005f * rb[j])/327.68f;
float LL=rL[j]/327.68f;
float x_ = 65535.0f * (float) Color::f2xyz(fx)*Color::D50x;
//float y_ = 65535.0 * Color::f2xyz(fy);
float z_ = 65535.0f * (float) Color::f2xyz(fz)*Color::D50z;
float y_= (LL>Color::epskap) ? (float) 65535.0f*fy*fy*fy : 65535.0f*LL/Color::kappa;
Color::xyz2srgb(x_,y_,z_,R,G,B);
image->r(i-cy,j-cx) = (int)gamma2curve[CLIP(R)];
image->g(i-cy,j-cx) = (int)gamma2curve[CLIP(G)];
image->b(i-cy,j-cx) = (int)gamma2curve[CLIP(B)];
}
}
}
return image;
}
// for gamma options (BT709...sRGB linear...)
Image16* ImProcFunctions::lab2rgb16b (LabImage* lab, int cx, int cy, int cw, int ch, Glib::ustring profile, Glib::ustring profi, Glib::ustring gam, bool freegamma, double gampos, double slpos, double &ga0, double &ga1, double &ga2, double &ga3, double &ga4, double &ga5, double &ga6, bool bw) {
//gamutmap(lab);
if (cx<0) cx = 0;
if (cy<0) cy = 0;
if (cx+cw>lab->W) cw = lab->W-cx;
if (cy+ch>lab->H) ch = lab->H-cy;
Image16* image = new Image16 (cw, ch);
float p1,p2,p3,p4,p5,p6;//primaries
//double ga0,ga1,ga2,ga3,ga4,ga5=0.0,ga6=0.0;//gamma parameters
double g_a0,g_a1,g_a2,g_a3,g_a4,g_a5;//gamma parameters
double pwr;
double ts;
ga6=0.0;
pwr=1.0/gampos;
ts=slpos;
int mode=0, imax=0;
int t50;
int select_temp =1;//5003K
const double eps=0.000000001;// not divide by zero
//primaries for 7 working profiles ==> output profiles
// eventually to adapt primaries if RT used special profiles !
if(profi=="ProPhoto") {p1=0.7347; p2=0.2653; p3=0.1596; p4=0.8404; p5=0.0366; p6=0.0001;select_temp=1;}//Prophoto primaries
else if (profi=="WideGamut") {p1=0.7350; p2=0.2650; p3=0.1150; p4=0.8260; p5=0.1570; p6=0.0180;select_temp=1;}//Widegamut primaries
else if (profi=="Adobe RGB") {p1=0.6400; p2=0.3300; p3=0.2100; p4=0.7100; p5=0.1500; p6=0.0600;select_temp=2;}//Adobe primaries
else if (profi=="sRGB") {p1=0.6400; p2=0.3300; p3=0.3000; p4=0.6000; p5=0.1500; p6=0.0600;select_temp=2;} // sRGB primaries
else if (profi=="BruceRGB") {p1=0.6400; p2=0.3300; p3=0.2800; p4=0.6500; p5=0.1500; p6=0.0600;select_temp=2;} // Bruce primaries
else if (profi=="Beta RGB") {p1=0.6888; p2=0.3112; p3=0.1986; p4=0.7551; p5=0.1265; p6=0.0352;select_temp=1;} // Beta primaries
else if (profi=="BestRGB") {p1=0.7347; p2=0.2653; p3=0.2150; p4=0.7750; p5=0.1300; p6=0.0350;select_temp=1;} // Best primaries
if (!freegamma) {//if Free gamma not selected
// gamma : ga0,ga1,ga2,ga3,ga4,ga5 by calcul
if(gam=="BT709_g2.2_s4.5") {ga0=2.22;ga1=0.909995;ga2=0.090005;ga3=0.222222; ga4=0.081071;ga5=0.0;}//BT709 2.2 4.5 - my prefered as D.Coffin
else if (gam=="sRGB_g2.4_s12.92") {ga0=2.40; ga1=0.947858; ga2=0.052142;ga3=0.077399;ga4=0.039293;ga5=0.0;}//sRGB 2.4 12.92 - RT default as Lightroom
else if (gam=="High_g1.3_s3.35") {ga0=1.3 ; ga1=0.998279; ga2=0.001721;ga3=0.298507;ga4=0.005746;ga5=0.0;}//for high dynamic images
else if (gam== "Low_g2.6_s6.9") {ga0=2.6 ; ga1=0.891161; ga2=0.108839;ga3=0.144928;ga4=0.076332;ga5=0.0;} //gamma 2.6 variable : for low contrast images
else if (gam=="linear_g1.0") {ga0=1.0; ga1=1.;ga2=0.;ga3=1./eps;ga4=0.;ga5=0.0;}//gamma=1 linear : for high dynamic images (cf : D.Coffin...)
else if (gam=="standard_g2.2") {ga0=2.2; ga1=1.;ga2=0.;ga3=1./eps;ga4=0.;ga5=0.0;}//gamma=2.2 (as gamma of Adobe, Widegamut...)
else if (gam=="standard_g1.8") {ga0=1.8; ga1=1.;ga2=0.;ga3=1./eps;ga4=0.;ga5=0.0;}//gamma=1.8 (as gamma of Prophoto)
}
else //free gamma selected
{
if(slpos==0) slpos=eps;
Color::calcGamma(pwr, ts, mode, imax,g_a0,g_a1,g_a2,g_a3,g_a4,g_a5);// call to calcGamma with selected gamma and slope : return parameters for LCMS2
ga4=g_a3*ts;
//printf("g_a0=%f g_a1=%f g_a2=%f g_a3=%f g_a4=%f\n", g_a0,g_a1,g_a2,g_a3,g_a4);
ga0=gampos;ga1=1./(1.0+g_a4);ga2=g_a4/(1.0 + g_a4);ga3=1./slpos;ga5=0.0;
//printf("ga0=%f ga1=%f ga2=%f ga3=%f ga4=%f\n", ga0,ga1,ga2,ga3,ga4);
}
if(select_temp==1) t50=5003;// for Widegamut, Prophoto Best, Beta D50
else if (select_temp==2) t50=6504;// for sRGB, AdobeRGB, Bruce D65
cmsCIExyY xyD;
cmsCIExyYTRIPLE Primaries = {{p1, p2, 1.0},//red primaries
{p3, p4, 1.0}, // green
{p5, p6, 1.0} //blue
};
cmsToneCurve* GammaTRC[3];
cmsFloat64Number Parameters[7];
Parameters[0] = ga0;
Parameters[1] = ga1;
Parameters[2] = ga2;
Parameters[3] = ga3;
Parameters[4] = ga4;
Parameters[5] = ga5;
Parameters[6] = ga6;
// 7 parameters for smoother curves
cmsWhitePointFromTemp(&xyD, t50);
GammaTRC[0] = GammaTRC[1] = GammaTRC[2] = cmsBuildParametricToneCurve(NULL, 5, Parameters);//5 = more smoother than 4
cmsHPROFILE oprofdef = cmsCreateRGBProfileTHR(NULL, &xyD, &Primaries, GammaTRC); //oprofdef become Outputprofile
cmsFreeToneCurve(GammaTRC[0]);
if (oprofdef) {
#pragma omp parallel for if (multiThread)
for (int i=cy; i<cy+ch; i++) {
float* rL = lab->L[i];
float* ra = lab->a[i];
float* rb = lab->b[i];
short* xa = (short*)image->r(i-cy);
short* ya = (short*)image->g(i-cy);
short* za = (short*)image->b(i-cy);
for (int j=cx; j<cx+cw; j++) {
float fy = (0.0086206897f* rL[j])/327.68f + 0.1379310345f; // (L+16)/116
float fx = (0.002f * ra[j])/327.68f + fy;
float fz = fy - (0.005f * rb[j])/327.68f;
float LL=rL[j]/327.68f;
float x_ = 65535.0f * (float)Color::f2xyz(fx)*Color::D50x;
// float y_ = 65535.0 * Color::f2xyz(fy);
float z_ = 65535.0f * (float)Color::f2xyz(fz)*Color::D50z;
float y_= (LL>Color::epskap) ? (float) 65535.0*fy*fy*fy : 65535.0f*LL/Color::kappa;
xa[j-cx] = CLIP((int) round(x_)) ;
ya[j-cx] = CLIP((int) round(y_));
za[j-cx] = CLIP((int) round(z_));
if(bw && y_ < 65535.f){//force Bw value and take highlight into account
xa[j-cx] =(int) round(y_ * Color::D50x);
za[j-cx] =(int) round(y_ * Color::D50z);
}
}
}
cmsHPROFILE iprof = iccStore->getXYZProfile ();
lcmsMutex->lock ();
cmsHTRANSFORM hTransform = cmsCreateTransform (iprof, TYPE_RGB_16, oprofdef, TYPE_RGB_16, settings->colorimetricIntent, cmsFLAGS_NOOPTIMIZE | cmsFLAGS_NOCACHE);
lcmsMutex->unlock ();
image->ExecCMSTransform(hTransform);
cmsDeleteTransform(hTransform);
} else {
//
#pragma omp parallel for if (multiThread)
for (int i=cy; i<cy+ch; i++) {
float R,G,B;
float* rL = lab->L[i];
float* ra = lab->a[i];
float* rb = lab->b[i];
for (int j=cx; j<cx+cw; j++) {
float fy = (0.0086206897f * rL[j])/327.68f + 0.1379310345f; // (L+16)/116
float fx = (0.002f * ra[j])/327.68f + fy;
float fz = fy - (0.005f * rb[j])/327.68f;
float LL=rL[j]/327.68f;
float x_ = 65535.0f * (float) Color::f2xyz(fx)*Color::D50x;
//float y_ = 65535.0 * Color::f2xyz(fy);
float z_ = 65535.0f * (float) Color::f2xyz(fz)*Color::D50z;
float y_= (LL>Color::epskap) ? (float) 65535.0*fy*fy*fy : 65535.0f*LL/Color::kappa;
Color::xyz2srgb(x_,y_,z_,R,G,B);
image->r(i-cy,j-cx) = (int)gamma2curve[CLIP(R)];
image->g(i-cy,j-cx) = (int)gamma2curve[CLIP(G)];
image->b(i-cy,j-cx) = (int)gamma2curve[CLIP(B)];
}
}
}
return image;
}
//#include "sRGBgamutbdy.cc"
}
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