// 
// Decompiled by Procyon v0.6.0
// 

package org.fusesource.jansi.io;

public class Colors
{
    public static final int[] DEFAULT_COLORS_256;
    private static final double epsilon = 0.008856451679035631;
    private static final double kappa = 903.2962962962963;
    
    public static int roundColor(int col, final int max) {
        if (col >= max) {
            final int c = Colors.DEFAULT_COLORS_256[col];
            col = roundColor(c, Colors.DEFAULT_COLORS_256, max);
        }
        return col;
    }
    
    public static int roundRgbColor(final int r, final int g, final int b, final int max) {
        return roundColor((r << 16) + (g << 8) + b, Colors.DEFAULT_COLORS_256, max);
    }
    
    private static int roundColor(final int color, final int[] colors, final int max) {
        double best_distance = 2.147483647E9;
        int best_index = Integer.MAX_VALUE;
        for (int idx = 0; idx < max; ++idx) {
            final double d = cie76(color, colors[idx]);
            if (d <= best_distance) {
                best_index = idx;
                best_distance = d;
            }
        }
        return best_index;
    }
    
    private static double cie76(final int c1, final int c2) {
        return scalar(rgb2cielab(c1), rgb2cielab(c2));
    }
    
    private static double scalar(final double[] c1, final double[] c2) {
        return sqr(c1[0] - c2[0]) + sqr(c1[1] - c2[1]) + sqr(c1[2] - c2[2]);
    }
    
    private static double[] rgb(final int color) {
        final int r = color >> 16 & 0xFF;
        final int g = color >> 8 & 0xFF;
        final int b = color >> 0 & 0xFF;
        return new double[] { r / 255.0, g / 255.0, b / 255.0 };
    }
    
    private static double[] rgb2cielab(final int color) {
        return rgb2cielab(rgb(color));
    }
    
    private static double[] rgb2cielab(final double[] rgb) {
        return xyz2lab(rgb2xyz(rgb));
    }
    
    private static double[] rgb2xyz(final double[] rgb) {
        final double vr = pivotRgb(rgb[0]);
        final double vg = pivotRgb(rgb[1]);
        final double vb = pivotRgb(rgb[2]);
        final double x = vr * 0.4124564 + vg * 0.3575761 + vb * 0.1804375;
        final double y = vr * 0.2126729 + vg * 0.7151522 + vb * 0.072175;
        final double z = vr * 0.0193339 + vg * 0.119192 + vb * 0.9503041;
        return new double[] { x, y, z };
    }
    
    private static double pivotRgb(final double n) {
        return (n > 0.04045) ? Math.pow((n + 0.055) / 1.055, 2.4) : (n / 12.92);
    }
    
    private static double[] xyz2lab(final double[] xyz) {
        final double fx = pivotXyz(xyz[0]);
        final double fy = pivotXyz(xyz[1]);
        final double fz = pivotXyz(xyz[2]);
        final double l = 116.0 * fy - 16.0;
        final double a = 500.0 * (fx - fy);
        final double b = 200.0 * (fy - fz);
        return new double[] { l, a, b };
    }
    
    private static double pivotXyz(final double n) {
        return (n > 0.008856451679035631) ? Math.cbrt(n) : ((903.2962962962963 * n + 16.0) / 116.0);
    }
    
    private static double sqr(final double n) {
        return n * n;
    }
    
    static {
        DEFAULT_COLORS_256 = new int[] { 0, 8388608, 32768, 8421376, 128, 8388736, 32896, 12632256, 8421504, 16711680, 65280, 16776960, 255, 16711935, 65535, 16777215, 0, 95, 135, 175, 215, 255, 24320, 24415, 24455, 24495, 24535, 24575, 34560, 34655, 34695, 34735, 34775, 34815, 44800, 44895, 44935, 44975, 45015, 45055, 55040, 55135, 55175, 55215, 55255, 55295, 65280, 65375, 65415, 65455, 65495, 65535, 6225920, 6226015, 6226055, 6226095, 6226135, 6226175, 6250240, 6250335, 6250375, 6250415, 6250455, 6250495, 6260480, 6260575, 6260615, 6260655, 6260695, 6260735, 6270720, 6270815, 6270855, 6270895, 6270935, 6270975, 6280960, 6281055, 6281095, 6281135, 6281175, 6281215, 6291200, 6291295, 6291335, 6291375, 6291415, 6291455, 8847360, 8847455, 8847495, 8847535, 8847575, 8847615, 8871680, 8871775, 8871815, 8871855, 8871895, 8871935, 8881920, 8882015, 8882055, 8882095, 8882135, 8882175, 8892160, 8892255, 8892295, 8892335, 8892375, 8892415, 8902400, 8902495, 8902535, 8902575, 8902615, 8902655, 8912640, 8912735, 8912775, 8912815, 8912855, 8912895, 11468800, 11468895, 11468935, 11468975, 11469015, 11469055, 11493120, 11493215, 11493255, 11493295, 11493335, 11493375, 11503360, 11503455, 11503495, 11503535, 11503575, 11503615, 11513600, 11513695, 11513735, 11513775, 11513815, 11513855, 11523840, 11523935, 11523975, 11524015, 11524055, 11524095, 11534080, 11534175, 11534215, 11534255, 11534295, 11534335, 14090240, 14090335, 14090375, 14090415, 14090455, 14090495, 14114560, 14114655, 14114695, 14114735, 14114775, 14114815, 14124800, 14124895, 14124935, 14124975, 14125015, 14125055, 14135040, 14135135, 14135175, 14135215, 14135255, 14135295, 14145280, 14145375, 14145415, 14145455, 14145495, 14145535, 14155520, 14155615, 14155655, 14155695, 14155735, 14155775, 16711680, 16711775, 16711815, 16711855, 16711895, 16711935, 16736000, 16736095, 16736135, 16736175, 16736215, 16736255, 16746240, 16746335, 16746375, 16746415, 16746455, 16746495, 16756480, 16756575, 16756615, 16756655, 16756695, 16756735, 16766720, 16766815, 16766855, 16766895, 16766935, 16766975, 16776960, 16777055, 16777095, 16777135, 16777175, 16777215, 526344, 1184274, 1842204, 2500134, 3158064, 3815994, 4473924, 5131854, 5789784, 6447714, 7105644, 7763574, 8421504, 9079434, 9737364, 10395294, 11053224, 11711154, 12369084, 13027014, 13684944, 14342874, 15000804, 15658734 };
    }
}