diff options
Diffstat (limited to 'third_party/lcms/src/cmspcs.c')
| -rw-r--r-- | third_party/lcms/src/cmspcs.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/third_party/lcms/src/cmspcs.c b/third_party/lcms/src/cmspcs.c index 102cd7d21e..0cd8ecbf69 100644 --- a/third_party/lcms/src/cmspcs.c +++ b/third_party/lcms/src/cmspcs.c @@ -1,7 +1,7 @@ //--------------------------------------------------------------------------------- // // Little Color Management System -// Copyright (c) 1998-2010 Marti Maria Saguer +// Copyright (c) 1998-2016 Marti Maria Saguer // // Permission is hereby granted, free of charge, to any person obtaining // a copy of this software and associated documentation files (the "Software"), @@ -106,6 +106,15 @@ void CMSEXPORT cmsxyY2XYZ(cmsCIEXYZ* Dest, const cmsCIExyY* Source) Dest -> Z = ((1 - Source -> x - Source -> y) / Source -> y) * Source -> Y; } +/* + The break point (24/116)^3 = (6/29)^3 is a very small amount of tristimulus + primary (0.008856). Generally, this only happens for + nearly ideal blacks and for some orange / amber colors in transmission mode. + For example, the Z value of the orange turn indicator lamp lens on an + automobile will often be below this value. But the Z does not + contribute to the perceived color directly. +*/ + static cmsFloat64Number f(cmsFloat64Number t) { @@ -299,7 +308,7 @@ void CMSEXPORT cmsFloat2LabEncoded(cmsUInt16Number wLab[3], const cmsCIELab* fLa wLab[2] = ab2Fix4(Lab.b); } -// Auxiliar: convert to Radians +// Auxiliary: convert to Radians static cmsFloat64Number RADIANS(cmsFloat64Number deg) { @@ -307,7 +316,7 @@ cmsFloat64Number RADIANS(cmsFloat64Number deg) } -// Auxiliar: atan2 but operating in degrees and returning 0 if a==b==0 +// Auxiliary: atan2 but operating in degrees and returning 0 if a==b==0 static cmsFloat64Number atan2deg(cmsFloat64Number a, cmsFloat64Number b) { @@ -330,7 +339,7 @@ cmsFloat64Number atan2deg(cmsFloat64Number a, cmsFloat64Number b) } -// Auxiliar: Square +// Auxiliary: Square static cmsFloat64Number Sqr(cmsFloat64Number v) { |