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Direktori : /home2/selectio/www/3-idiots/vendor/intervention/image/src/Intervention/Image/Gd/ |
Current File : /home2/selectio/www/3-idiots/vendor/intervention/image/src/Intervention/Image/Gd/Color.php |
<?php namespace Intervention\Image\Gd; use Intervention\Image\AbstractColor; use Intervention\Image\Exception\NotSupportedException; class Color extends AbstractColor { /** * RGB Red value of current color instance * * @var int */ public $r; /** * RGB Green value of current color instance * * @var int */ public $g; /** * RGB Blue value of current color instance * * @var int */ public $b; /** * RGB Alpha value of current color instance * * @var float */ public $a; /** * Initiates color object from integer * * @param int $value * @return \Intervention\Image\AbstractColor */ public function initFromInteger($value) { $this->a = ($value >> 24) & 0xFF; $this->r = ($value >> 16) & 0xFF; $this->g = ($value >> 8) & 0xFF; $this->b = $value & 0xFF; } /** * Initiates color object from given array * * @param array $value * @return \Intervention\Image\AbstractColor */ public function initFromArray($array) { $array = array_values($array); if (count($array) == 4) { // color array with alpha value list($r, $g, $b, $a) = $array; $this->a = $this->alpha2gd($a); } elseif (count($array) == 3) { // color array without alpha value list($r, $g, $b) = $array; $this->a = 0; } $this->r = $r; $this->g = $g; $this->b = $b; } /** * Initiates color object from given string * * @param string $value * @return \Intervention\Image\AbstractColor */ public function initFromString($value) { if ($color = $this->rgbaFromString($value)) { $this->r = $color[0]; $this->g = $color[1]; $this->b = $color[2]; $this->a = $this->alpha2gd($color[3]); } } /** * Initiates color object from given R, G and B values * * @param int $r * @param int $g * @param int $b * @return \Intervention\Image\AbstractColor */ public function initFromRgb($r, $g, $b) { $this->r = intval($r); $this->g = intval($g); $this->b = intval($b); $this->a = 0; } /** * Initiates color object from given R, G, B and A values * * @param int $r * @param int $g * @param int $b * @param float $a * @return \Intervention\Image\AbstractColor */ public function initFromRgba($r, $g, $b, $a = 1) { $this->r = intval($r); $this->g = intval($g); $this->b = intval($b); $this->a = $this->alpha2gd($a); } /** * Initiates color object from given ImagickPixel object * * @param ImagickPixel $value * @return \Intervention\Image\AbstractColor */ public function initFromObject($value) { throw new NotSupportedException( "GD colors cannot init from ImagickPixel objects." ); } /** * Calculates integer value of current color instance * * @return int */ public function getInt() { return ($this->a << 24) + ($this->r << 16) + ($this->g << 8) + $this->b; } /** * Calculates hexadecimal value of current color instance * * @param string $prefix * @return string */ public function getHex($prefix = '') { return sprintf('%s%02x%02x%02x', $prefix, $this->r, $this->g, $this->b); } /** * Calculates RGB(A) in array format of current color instance * * @return array */ public function getArray() { return [$this->r, $this->g, $this->b, round(1 - $this->a / 127, 2)]; } /** * Calculates RGBA in string format of current color instance * * @return string */ public function getRgba() { return sprintf('rgba(%d, %d, %d, %.2F)', $this->r, $this->g, $this->b, round(1 - $this->a / 127, 2)); } /** * Determines if current color is different from given color * * @param AbstractColor $color * @param int $tolerance * @return boolean */ public function differs(AbstractColor $color, $tolerance = 0) { $color_tolerance = round($tolerance * 2.55); $alpha_tolerance = round($tolerance * 1.27); $delta = [ 'r' => abs($color->r - $this->r), 'g' => abs($color->g - $this->g), 'b' => abs($color->b - $this->b), 'a' => abs($color->a - $this->a) ]; return ( $delta['r'] > $color_tolerance or $delta['g'] > $color_tolerance or $delta['b'] > $color_tolerance or $delta['a'] > $alpha_tolerance ); } /** * Convert rgba alpha (0-1) value to gd value (0-127) * * @param float $input * @return int */ private function alpha2gd($input) { $oldMin = 0; $oldMax = 1; $newMin = 127; $newMax = 0; return ceil(((($input- $oldMin) * ($newMax - $newMin)) / ($oldMax - $oldMin)) + $newMin); } }