public static function PHPExcel_Style_Color::changeBrightness in Loft Data Grids 6.2

Same name and namespace in other branches

1. 7.2 vendor/phpoffice/phpexcel/Classes/PHPExcel/Style/Color.php \PHPExcel_Style_Color::changeBrightness()

* Adjust the brightness of a color * *

Parameters

string $hex The colour as an RGBA or RGB value (e.g. FF00CCCC or CCDDEE): * @param float $adjustPercentage The percentage by which to adjust the colour as a float from -1 to 1 * @return string The adjusted colour as an RGBA or RGB value (e.g. FF00CCCC or CCDDEE)

1 call to PHPExcel_Style_Color::changeBrightness()

PHPExcel_Reader_Excel2007::_readColor in vendor/phpoffice/phpexcel/Classes/PHPExcel/Reader/Excel2007.php

File

vendor/phpoffice/phpexcel/Classes/PHPExcel/Style/Color.php, line 300

Class

PHPExcel_Style_Color

PHPExcel_Style_Color

Code

public static function changeBrightness($hex, $adjustPercentage) {
  $rgba = strlen($hex) == 8;
  $red = self::getRed($hex, FALSE);
  $green = self::getGreen($hex, FALSE);
  $blue = self::getBlue($hex, FALSE);
  if ($adjustPercentage > 0) {
    $red += (255 - $red) * $adjustPercentage;
    $green += (255 - $green) * $adjustPercentage;
    $blue += (255 - $blue) * $adjustPercentage;
  }
  else {
    $red += $red * $adjustPercentage;
    $green += $green * $adjustPercentage;
    $blue += $blue * $adjustPercentage;
  }
  if ($red < 0) {
    $red = 0;
  }
  elseif ($red > 255) {
    $red = 255;
  }
  if ($green < 0) {
    $green = 0;
  }
  elseif ($green > 255) {
    $green = 255;
  }
  if ($blue < 0) {
    $blue = 0;
  }
  elseif ($blue > 255) {
    $blue = 255;
  }
  $rgb = strtoupper(str_pad(dechex($red), 2, '0', 0) . str_pad(dechex($green), 2, '0', 0) . str_pad(dechex($blue), 2, '0', 0));
  return ($rgba ? 'FF' : '') . $rgb;
}