File Metadata

Created: Tue, Sep 23, 3:43 AM

Color.php
View Options

	<?php
	/* Libchart - PHP chart library
	* Copyright (C) 2005-2007 Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation, either version 3 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*
	*/

	defined('FULL_PATH') or die('restricted access!');

	/**
	* Color.
	*
	* @author Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
	*/
	class LibchartColor {
	private $red;
	private $green;
	private $blue;
	private $alpha;
	private $gdColor;

	/**
	* Creates a new color
	*
	* @param integer red [0..255]
	* @param integer green [0..255]
	* @param integer blue [0..255]
	* @param integer alpha [0..255]
	*/
	public function __construct($red, $green, $blue, $alpha = 0) {
	$this->red = (int) $red;
	$this->green = (int) $green;
	$this->blue = (int) $blue;
	$this->alpha = (int) round($alpha * 127.0 / 255);

	$this->gdColor = null;
	}

	/**
	* Get GD color.
	*
	* @param $img GD image resource
	*/
	public function getColor($img) {
	// Checks if color has already been allocated
	if (!$this->gdColor) {
	if ($this->alpha == 0 \|\| !function_exists('imagecolorallocatealpha')) {
	$this->gdColor = imagecolorallocate($img, $this->red, $this->green, $this->blue);
	} else {
	$this->gdColor = imagecolorallocatealpha($img, $this->red, $this->green, $this->blue, $this->alpha);
	}
	}

	// Returns GD color
	return $this->gdColor;
	}

	/**
	* Clip a color component in the interval [0..255]
	*
	* @param integer Component
	* @return Clipped component
	*/
	public function clip($component) {
	if ($component < 0) {
	$component = 0;
	} else if ($component > 255) {
	$component = 255;
	}

	return $component;
	}

	/**
	* Return a new color, which is a shadow of this one.
	*
	* @param double Multiplication factor
	* @return Shadow color
	*/
	public function getShadowColor($shadowFactor) {
	$red = $this->clip($this->red * $shadowFactor);
	$green = $this->clip($this->green * $shadowFactor);
	$blue = $this->clip($this->blue * $shadowFactor);
	$shadowColor = new LibchartColor($red, $green, $blue);

	return $shadowColor;
	}
	}

Color.php
No OneTemporary
Actions

File Metadata

Color.php
View Options

Event Timeline

Color.phpNo OneTemporaryActions

File Metadata

Color.phpView Options

Event Timeline

Color.php
No OneTemporary
Actions

Color.php
View Options