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Diffstat (limited to 'Build/source/libs/libpng/libpng-1.6.2/contrib/tools/sRGB.h')
-rw-r--r-- | Build/source/libs/libpng/libpng-1.6.2/contrib/tools/sRGB.h | 48 |
1 files changed, 0 insertions, 48 deletions
diff --git a/Build/source/libs/libpng/libpng-1.6.2/contrib/tools/sRGB.h b/Build/source/libs/libpng/libpng-1.6.2/contrib/tools/sRGB.h deleted file mode 100644 index 22c8f7c0e3d..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.2/contrib/tools/sRGB.h +++ /dev/null @@ -1,48 +0,0 @@ -/*- - * sRGB.h - * - * Last changed in libpng 1.6.0 [February 14, 2013] - * - * COPYRIGHT: Written by John Cunningham Bowler, 2013. - * To the extent possible under law, the author has waived all copyright and - * related or neighboring rights to this work. This work is published from: - * United States. - * - * Utility file; not actually a header, this contains definitions of sRGB - * calculation functions for inclusion in those test programs that need them. - * - * All routines take and return a floating point value in the range - * 0 to 1.0, doing a calculation according to the sRGB specification - * (in fact the source of the numbers is the wikipedia article at - * http://en.wikipedia.org/wiki/SRGB). - */ -static double -sRGB_from_linear(double l) -{ - if (l <= 0.0031308) - l *= 12.92; - - else - l = 1.055 * pow(l, 1/2.4) - 0.055; - - return l; -} - -static double -linear_from_sRGB(double s) -{ - if (s <= 0.04045) - return s / 12.92; - - else - return pow((s+0.055)/1.055, 2.4); -} - -static double -YfromRGB(double r, double g, double b) -{ - /* Use the sRGB (rounded) coefficients for Rlinear, Glinear, Blinear to get - * the CIE Y value (also linear). - */ - return 0.2126 * r + 0.7152 * g + 0.0722 * b; -} |