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vo_opengl: fix typo in gamma function's parameter

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The correct value is 0.081, not 0.18. The scale factor also needed
slight adjustment due to the order of operations.
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nand
2014-02-10 17:28:49 +01:00
committed by wm4
parent 1fcdf2d849
commit 7d9fff9c6b
1 changed files with 2 additions and 2 deletions
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4
video/out/gl_lcms.c
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@@ -168,9 +168,9 @@ struct lut3d *mp_load_icc(struct mp_icc_opts *opts, struct mp_log *log,
V = 1.099 * L^0.45 - 0.099 for L >= 0.018
V = 4.500 * L for L < 0.018
The 0.18 parameter comes from inserting 0.018 into the function */
The 0.081 parameter comes from inserting 0.018 into the function */
cmsToneCurve *tonecurve = cmsBuildParametricToneCurve(NULL, 4,
(cmsFloat64Number[5]){1/0.45, 1/1.099, 0.099, 1/4.5, 0.18});
(cmsFloat64Number[5]){1/0.45, 1/1.099, 0.099/1.099, 1/4.5, 0.081});
cmsHPROFILE vid_profile = cmsCreateRGBProfile(&d65, &bt709prim,
(cmsToneCurve*[3]){tonecurve, tonecurve, tonecurve});
cmsFreeToneCurve(tonecurve);