From b0732a0ed9c6b9988f6b2d5e7008c4c5732088c6 Mon Sep 17 00:00:00 2001 From: Cristy Date: Mon, 1 Mar 2021 21:05:36 +0800 Subject: [PATCH] https://github.com/ImageMagick/ImageMagick/issues/1739 --- magick/gem-private.h | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/magick/gem-private.h b/magick/gem-private.h index fa464f0..0cfaf3b 100644 --- a/magick/gem-private.h +++ b/magick/gem-private.h @@ -132,6 +132,9 @@ static inline void ConvertXYZToLab(const double X,const double Y,const double Z, static inline void ConvertLuvToXYZ(const double L,const double u,const double v, double *X,double *Y,double *Z) { + double + gamma; + assert(X != (double *) NULL); assert(Y != (double *) NULL); assert(Z != (double *) NULL); @@ -139,9 +142,10 @@ static inline void ConvertLuvToXYZ(const double L,const double u,const double v, *Y=(double) pow((L+16.0)/116.0,3.0); else *Y=L/CIEK; - *X=((*Y*((39.0*L/(v+13.0*L*(9.0*D65Y/(D65X+15.0*D65Y+3.0*D65Z))))-5.0))+ - 5.0*(*Y))/((((52.0f*L/(u+13.0*L*(4.0*D65X/(D65X+15.0*D65Y+3.0*D65Z))))-1.0)/ - 3.0)-(-1.0/3.0)); + gamma=PerceptibleReciprocal((((52.0*L/(u+13.0*L*(4.0*D65X/(D65X+15.0*D65Y+ + 3.0*D65Z))))-1.0)/3.0)-(-1.0/3.0)); + *X=gamma*((*Y*((39.0*L/(v+13.0*L*(9.0*D65Y/(D65X+15.0*D65Y+3.0*D65Z))))-5.0))+ + 5.0*(*Y)); *Z=(*X*(((52.0f*L/(u+13.0*L*(4.0*D65X/(D65X+15.0*D65Y+3.0*D65Z))))-1.0)/3.0))- 5.0*(*Y); } -- 2.23.0