<?php

namespace PhpOffice\PhpSpreadsheet\Style;

/**
 * Class to handle tint applied to color.
 * Code borrows heavily from some Python projects.
 *
 * @see https://docs.python.org/3/library/colorsys.html
 * @see https://gist.github.com/Mike-Honey/b36e651e9a7f1d2e1d60ce1c63b9b633
 */
class RgbTint
{
    private const ONE_THIRD = 1.0 / 3.0;
    private const ONE_SIXTH = 1.0 / 6.0;
    private const TWO_THIRD = 2.0 / 3.0;
    private const RGBMAX = 255.0;
    /**
     * MS excel's tint function expects that HLS is base 240.
     *
     * @see https://social.msdn.microsoft.com/Forums/en-US/e9d8c136-6d62-4098-9b1b-dac786149f43/excel-color-tint-algorithm-incorrect?forum=os_binaryfile#d3c2ac95-52e0-476b-86f1-e2a697f24969
     */
    private const HLSMAX = 240.0;

    /**
     * Convert red/green/blue to hue/luminance/saturation.
     *
     * @param float $red 0.0 through 1.0
     * @param float $green 0.0 through 1.0
     * @param float $blue 0.0 through 1.0
     *
     * @return float[]
     */
    private static function rgbToHls(float $red, float $green, float $blue): array
    {
        $maxc = max($red, $green, $blue);
        $minc = min($red, $green, $blue);
        $luminance = ($minc + $maxc) / 2.0;
        if ($minc === $maxc) {
            return [0.0, $luminance, 0.0];
        }
        $maxMinusMin = $maxc - $minc;
        if ($luminance <= 0.5) {
            $s = $maxMinusMin / ($maxc + $minc);
        } else {
            $s = $maxMinusMin / (2.0 - $maxc - $minc);
        }
        $rc = ($maxc - $red) / $maxMinusMin;
        $gc = ($maxc - $green) / $maxMinusMin;
        $bc = ($maxc - $blue) / $maxMinusMin;
        if ($red === $maxc) {
            $h = $bc - $gc;
        } elseif ($green === $maxc) {
            $h = 2.0 + $rc - $bc;
        } else {
            $h = 4.0 + $gc - $rc;
        }
        $h = self::positiveDecimalPart($h / 6.0);

        return [$h, $luminance, $s];
    }

    /** @var mixed */
    private static $scrutinizerZeroPointZero = 0.0;

    /**
     * Convert hue/luminance/saturation to red/green/blue.
     *
     * @param float $hue 0.0 through 1.0
     * @param float $luminance 0.0 through 1.0
     * @param float $saturation 0.0 through 1.0
     *
     * @return float[]
     */
    private static function hlsToRgb($hue, $luminance, $saturation): array
    {
        if ($saturation === self::$scrutinizerZeroPointZero) {
            return [$luminance, $luminance, $luminance];
        }
        if ($luminance <= 0.5) {
            $m2 = $luminance * (1.0 + $saturation);
        } else {
            $m2 = $luminance + $saturation - ($luminance * $saturation);
        }
        $m1 = 2.0 * $luminance - $m2;

        return [
            self::vFunction($m1, $m2, $hue + self::ONE_THIRD),
            self::vFunction($m1, $m2, $hue),
            self::vFunction($m1, $m2, $hue - self::ONE_THIRD),
        ];
    }

    private static function vFunction(float $m1, float $m2, float $hue): float
    {
        $hue = self::positiveDecimalPart($hue);
        if ($hue < self::ONE_SIXTH) {
            return $m1 + ($m2 - $m1) * $hue * 6.0;
        }
        if ($hue < 0.5) {
            return $m2;
        }
        if ($hue < self::TWO_THIRD) {
            return $m1 + ($m2 - $m1) * (self::TWO_THIRD - $hue) * 6.0;
        }

        return $m1;
    }

    private static function positiveDecimalPart(float $hue): float
    {
        $hue = fmod($hue, 1.0);

        return ($hue >= 0.0) ? $hue : (1.0 + $hue);
    }

    /**
     * Convert red/green/blue to HLSMAX-based hue/luminance/saturation.
     *
     * @return int[]
     */
    private static function rgbToMsHls(int $red, int $green, int $blue): array
    {
        $red01 = $red / self::RGBMAX;
        $green01 = $green / self::RGBMAX;
        $blue01 = $blue / self::RGBMAX;
        [$hue, $luminance, $saturation] = self::rgbToHls($red01, $green01, $blue01);

        return [
            (int) round($hue * self::HLSMAX),
            (int) round($luminance * self::HLSMAX),
            (int) round($saturation * self::HLSMAX),
        ];
    }

    /**
     * Converts HLSMAX based HLS values to rgb values in the range (0,1).
     *
     * @return float[]
     */
    private static function msHlsToRgb(int $hue, int $lightness, int $saturation): array
    {
        return self::hlsToRgb($hue / self::HLSMAX, $lightness / self::HLSMAX, $saturation / self::HLSMAX);
    }

    /**
     * Tints HLSMAX based luminance.
     *
     * @see http://ciintelligence.blogspot.co.uk/2012/02/converting-excel-theme-color-and-tint.html
     */
    private static function tintLuminance(float $tint, float $luminance): int
    {
        if ($tint < 0) {
            return (int) round($luminance * (1.0 + $tint));
        }

        return (int) round($luminance * (1.0 - $tint) + (self::HLSMAX - self::HLSMAX * (1.0 - $tint)));
    }

    /**
     * Return result of tinting supplied rgb as 6 hex digits.
     */
    public static function rgbAndTintToRgb(int $red, int $green, int $blue, float $tint): string
    {
        [$hue, $luminance, $saturation] = self::rgbToMsHls($red, $green, $blue);
        [$red, $green, $blue] = self::msHlsToRgb($hue, self::tintLuminance($tint, $luminance), $saturation);

        return sprintf(
            '%02X%02X%02X',
            (int) round($red * self::RGBMAX),
            (int) round($green * self::RGBMAX),
            (int) round($blue * self::RGBMAX)
        );
    }
}

• [D] ConditionalFormatting
• [D] NumberFormat
• [F] Alignment.php
  Delete
• [F] Border.php
  Delete
• [F] Borders.php
  Delete
• [F] Color.php
  Delete
• [F] Conditional.php
  Delete
• [F] Fill.php
  Delete
• [F] Font.php
  Delete
• [F] NumberFormat.php
  Delete
• [F] Protection.php
  Delete
• [F] RgbTint.php
  Delete
• [F] Style.php
  Delete
• [F] Supervisor.php
  Delete

Service Section

Our Services: Streamlining Your Payment Experience with Excellence

Discover how our services are designed to enhance your NFC Pay experience with convenience, security, and innovative solutions. From managing transactions to secure payments, we are dedicated to providing seamless support every step of the way.

Secure Card Storage

Easily save your credit and debit card details within our app for quick and secure transactions. This feature ensures that your payment information is protected with advanced encryption and can be used for future purchases with just a tap.

Effortless Money Transfers

Transfer funds quickly and securely between users with our streamlined money transfer service. Simply select the recipient, enter the amount, and authorize the transaction for instant, hassle-free transfers.

Merchant Account Setup

Activate your merchant account effortlessly to start receiving payments. Our intuitive setup process ensures that you can begin accepting transactions smoothly, helping your business thrive with minimal setup time.

Real-Time Transaction Tracking

Keep track of all your transactions in real time through our app. Monitor payment statuses, view transaction history, and manage your account efficiently, ensuring complete control over your financial activities.

Customer Support

Our dedicated support team is available to assist you with any queries or issues. Whether you need help with setting up your account or resolving transaction-related questions, we’re here to provide prompt and reliable assistance.