native/liblcms/cmsgamma.c

86 static cmsFloat64Number DefaultEvalParametricFn(cmsInt32Number Type, const cmsFloat64Number Params[], cmsFloat64Number R);
341 cmsFloat64Number DefaultEvalParametricFn(cmsInt32Number Type, const cmsFloat64Number Params[], cmsFloat64Number R)
351             if (fabs(Params[0] - 1.0) < MATRIX_DET_TOLERANCE)
357             Val = pow(R, Params[0]);
364             if (fabs(Params[0] - 1.0) < MATRIX_DET_TOLERANCE)
370             Val = pow(R, 1/Params[0]);
377         disc = -Params[2] / Params[1];
381             e = Params[1]*R + Params[2];
384                 Val = pow(e, Params[0]);
398              Val = (pow(R, 1.0/Params[0]) - Params[2]) / Params[1];
409         disc = -Params[2] / Params[1];
415             e = Params[1]*R + Params[2];
418                 Val = pow(e, Params[0]) + Params[3];
423             Val = Params[3];
431         if (R >= Params[3])  {
433             e = R - Params[3];
436                 Val = (pow(e, 1/Params[0]) - Params[2]) / Params[1];
441             Val = -Params[2] / Params[1];
450         if (R >= Params[4]) {
452             e = Params[1]*R + Params[2];
455                 Val = pow(e, Params[0]);
460             Val = R * Params[3];
467         e = Params[1] * Params[4] + Params[2];
471             disc = pow(e, Params[0]);
475             Val = (pow(R, 1.0/Params[0]) - Params[2]) / Params[1];
478             Val = R / Params[3];
486         if (R >= Params[4]) {
488             e = Params[1]*R + Params[2];
491                 Val = pow(e, Params[0]) + Params[5];
493                 Val = Params[5];
496             Val = R*Params[3] + Params[6];
505         disc = Params[3] * Params[4] + Params[6];
508             e = R - Params[5];
512                 Val = (pow(e, 1.0/Params[0]) - Params[2]) / Params[1];
515             Val = (R - Params[6]) / Params[3];
525         e = Params[1]*R + Params[2];
528             Val = Params[3];
530             Val = pow(e, Params[0]) + Params[3];
535         e = R - Params[3];
539         Val = (pow(e, 1.0/Params[0]) - Params[2]) / Params[1];
546        e = Params[2] * pow(R, Params[0]) + Params[3];
548            Val = Params[4];
550            Val = Params[1]*log10(e) + Params[4];
557        Val = pow((pow(10.0, (R-Params[4]) / Params[1]) - Params[3]) / Params[2], 1.0 / Params[0]);
563        Val = (Params[0] * pow(Params[1], Params[2] * R + Params[3]) + Params[4]);
571        disc = R - Params[4];
574            Val = (log(disc / Params[0]) / log(Params[1]) - Params[3]) / Params[2];
579       Val = pow(1.0 - pow(1 - R, 1/Params[0]), 1/Params[0]);
588         Val = 1 - pow(1 - pow(R, Params[0]), Params[0]);
625                 return g ->Evals[i](g->Segments[i].Type, g ->Segments[i].Params, R);
675         nGridPoints = EntriesByGamma(Segments[0].Params[0]);
707     Seg[0].Params[0] = 1;
708     Seg[0].Params[1] = 0;
709     Seg[0].Params[2] = 0;
710     Seg[0].Params[3] = values[0];
711     Seg[0].Params[4] = 0;
726     Seg[2].Params[0] = 1;
727     Seg[2].Params[1] = 0;
728     Seg[2].Params[2] = 0;
729     Seg[2].Params[3] = values[nEntries-1];
730     Seg[2].Params[4] = 0;
741 cmsToneCurve* CMSEXPORT cmsBuildParametricToneCurve(cmsContext ContextID, cmsInt32Number Type, const cmsFloat64Number Params[])
748     _cmsAssert(Params != NULL);
762     memmove(Seg0.Params, Params, size);
948                                        InCurve -> Segments[0].Params);