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615 lines
26 KiB
615 lines
26 KiB
<?php |
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//======================================================================= |
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// File: JPGRAPH_RGB.INC.PHP |
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// Description: Class to handle RGb color space specification and |
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// named colors |
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// Created: 2001-01-08 (Refactored to separate file 2008-08-01) |
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// Ver: $Id: jpgraph_rgb.inc.php 1893 2009-10-02 23:15:25Z ljp $ |
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// |
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// Copyright (c) Asial Corporation. All rights reserved. |
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//======================================================================== |
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/*=================================================== |
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// CLASS RGB |
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// Description: Color definitions as RGB triples |
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//=================================================== |
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*/ |
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class RGB { |
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public $rgb_table; |
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public $img; |
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|
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function __construct($aImg=null) { |
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$this->img = $aImg; |
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|
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// Conversion array between color names and RGB |
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$this->rgb_table = array( |
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'aqua'=> array(0,255,255), |
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'lime'=> array(0,255,0), |
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'teal'=> array(0,128,128), |
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'whitesmoke'=>array(245,245,245), |
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'gainsboro'=>array(220,220,220), |
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'oldlace'=>array(253,245,230), |
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'linen'=>array(250,240,230), |
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'antiquewhite'=>array(250,235,215), |
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'papayawhip'=>array(255,239,213), |
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'blanchedalmond'=>array(255,235,205), |
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'bisque'=>array(255,228,196), |
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'peachpuff'=>array(255,218,185), |
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'navajowhite'=>array(255,222,173), |
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'moccasin'=>array(255,228,181), |
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'cornsilk'=>array(255,248,220), |
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'ivory'=>array(255,255,240), |
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'lemonchiffon'=>array(255,250,205), |
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'seashell'=>array(255,245,238), |
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'mintcream'=>array(245,255,250), |
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'azure'=>array(240,255,255), |
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'aliceblue'=>array(240,248,255), |
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'lavender'=>array(230,230,250), |
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'lavenderblush'=>array(255,240,245), |
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'mistyrose'=>array(255,228,225), |
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'white'=>array(255,255,255), |
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'black'=>array(0,0,0), |
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'darkslategray'=>array(47,79,79), |
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'dimgray'=>array(105,105,105), |
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'slategray'=>array(112,128,144), |
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'lightslategray'=>array(119,136,153), |
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'gray'=>array(190,190,190), |
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'lightgray'=>array(211,211,211), |
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'midnightblue'=>array(25,25,112), |
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'navy'=>array(0,0,128), |
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'indigo'=>array(75,0,130), |
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'electricindigo'=>array(102,0,255), |
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'deepindigo'=>array(138,43,226), |
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'pigmentindigo'=>array(75,0,130), |
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'indigodye'=>array(0,65,106), |
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'cornflowerblue'=>array(100,149,237), |
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'darkslateblue'=>array(72,61,139), |
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'slateblue'=>array(106,90,205), |
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'mediumslateblue'=>array(123,104,238), |
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'lightslateblue'=>array(132,112,255), |
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'mediumblue'=>array(0,0,205), |
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'royalblue'=>array(65,105,225), |
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'blue'=>array(0,0,255), |
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'dodgerblue'=>array(30,144,255), |
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'deepskyblue'=>array(0,191,255), |
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'skyblue'=>array(135,206,235), |
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'lightskyblue'=>array(135,206,250), |
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'steelblue'=>array(70,130,180), |
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'lightred'=>array(211,167,168), |
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'lightsteelblue'=>array(176,196,222), |
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'lightblue'=>array(173,216,230), |
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'powderblue'=>array(176,224,230), |
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'paleturquoise'=>array(175,238,238), |
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'darkturquoise'=>array(0,206,209), |
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'mediumturquoise'=>array(72,209,204), |
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'turquoise'=>array(64,224,208), |
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'cyan'=>array(0,255,255), |
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'lightcyan'=>array(224,255,255), |
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'cadetblue'=>array(95,158,160), |
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'mediumaquamarine'=>array(102,205,170), |
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'aquamarine'=>array(127,255,212), |
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'darkgreen'=>array(0,100,0), |
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'darkolivegreen'=>array(85,107,47), |
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'darkseagreen'=>array(143,188,143), |
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'seagreen'=>array(46,139,87), |
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'mediumseagreen'=>array(60,179,113), |
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'lightseagreen'=>array(32,178,170), |
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'palegreen'=>array(152,251,152), |
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'springgreen'=>array(0,255,127), |
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'lawngreen'=>array(124,252,0), |
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'green'=>array(0,255,0), |
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'chartreuse'=>array(127,255,0), |
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'mediumspringgreen'=>array(0,250,154), |
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'greenyellow'=>array(173,255,47), |
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'limegreen'=>array(50,205,50), |
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'yellowgreen'=>array(154,205,50), |
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'forestgreen'=>array(34,139,34), |
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'olivedrab'=>array(107,142,35), |
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'darkkhaki'=>array(189,183,107), |
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'khaki'=>array(240,230,140), |
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'palegoldenrod'=>array(238,232,170), |
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'lightgoldenrodyellow'=>array(250,250,210), |
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'lightyellow'=>array(255,255,200), |
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'yellow'=>array(255,255,0), |
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'gold'=>array(255,215,0), |
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'lightgoldenrod'=>array(238,221,130), |
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'goldenrod'=>array(218,165,32), |
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'darkgoldenrod'=>array(184,134,11), |
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'rosybrown'=>array(188,143,143), |
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'indianred'=>array(205,92,92), |
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'saddlebrown'=>array(139,69,19), |
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'sienna'=>array(160,82,45), |
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'peru'=>array(205,133,63), |
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'burlywood'=>array(222,184,135), |
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'beige'=>array(245,245,220), |
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'wheat'=>array(245,222,179), |
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'sandybrown'=>array(244,164,96), |
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'tan'=>array(210,180,140), |
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'chocolate'=>array(210,105,30), |
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'firebrick'=>array(178,34,34), |
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'brown'=>array(165,42,42), |
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'darksalmon'=>array(233,150,122), |
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'salmon'=>array(250,128,114), |
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'lightsalmon'=>array(255,160,122), |
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'orange'=>array(255,165,0), |
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'darkorange'=>array(255,140,0), |
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'coral'=>array(255,127,80), |
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'lightcoral'=>array(240,128,128), |
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'tomato'=>array(255,99,71), |
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'orangered'=>array(255,69,0), |
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'red'=>array(255,0,0), |
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'hotpink'=>array(255,105,180), |
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'deeppink'=>array(255,20,147), |
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'pink'=>array(255,192,203), |
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'lightpink'=>array(255,182,193), |
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'palevioletred'=>array(219,112,147), |
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'maroon'=>array(176,48,96), |
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'mediumvioletred'=>array(199,21,133), |
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'violetred'=>array(208,32,144), |
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'magenta'=>array(255,0,255), |
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'violet'=>array(238,130,238), |
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'plum'=>array(221,160,221), |
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'orchid'=>array(218,112,214), |
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'mediumorchid'=>array(186,85,211), |
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'darkorchid'=>array(153,50,204), |
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'darkviolet'=>array(148,0,211), |
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'blueviolet'=>array(138,43,226), |
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'purple'=>array(160,32,240), |
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'mediumpurple'=>array(147,112,219), |
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'thistle'=>array(216,191,216), |
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'snow1'=>array(255,250,250), |
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'snow2'=>array(238,233,233), |
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'snow3'=>array(205,201,201), |
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'snow4'=>array(139,137,137), |
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'seashell1'=>array(255,245,238), |
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'seashell2'=>array(238,229,222), |
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'seashell3'=>array(205,197,191), |
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'seashell4'=>array(139,134,130), |
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'AntiqueWhite1'=>array(255,239,219), |
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'AntiqueWhite2'=>array(238,223,204), |
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'AntiqueWhite3'=>array(205,192,176), |
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'AntiqueWhite4'=>array(139,131,120), |
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'bisque1'=>array(255,228,196), |
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'bisque2'=>array(238,213,183), |
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'bisque3'=>array(205,183,158), |
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'bisque4'=>array(139,125,107), |
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'peachPuff1'=>array(255,218,185), |
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'peachpuff2'=>array(238,203,173), |
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'peachpuff3'=>array(205,175,149), |
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'peachpuff4'=>array(139,119,101), |
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'navajowhite1'=>array(255,222,173), |
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'navajowhite2'=>array(238,207,161), |
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'navajowhite3'=>array(205,179,139), |
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'navajowhite4'=>array(139,121,94), |
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'lemonchiffon1'=>array(255,250,205), |
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'lemonchiffon2'=>array(238,233,191), |
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'lemonchiffon3'=>array(205,201,165), |
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'lemonchiffon4'=>array(139,137,112), |
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'ivory1'=>array(255,255,240), |
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'ivory2'=>array(238,238,224), |
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'ivory3'=>array(205,205,193), |
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'ivory4'=>array(139,139,131), |
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'honeydew'=>array(193,205,193), |
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'lavenderblush1'=>array(255,240,245), |
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'lavenderblush2'=>array(238,224,229), |
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'lavenderblush3'=>array(205,193,197), |
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'lavenderblush4'=>array(139,131,134), |
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'mistyrose1'=>array(255,228,225), |
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'mistyrose2'=>array(238,213,210), |
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'mistyrose3'=>array(205,183,181), |
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'mistyrose4'=>array(139,125,123), |
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'azure1'=>array(240,255,255), |
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'azure2'=>array(224,238,238), |
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'azure3'=>array(193,205,205), |
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'azure4'=>array(131,139,139), |
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'slateblue1'=>array(131,111,255), |
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'slateblue2'=>array(122,103,238), |
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'slateblue3'=>array(105,89,205), |
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'slateblue4'=>array(71,60,139), |
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'royalblue1'=>array(72,118,255), |
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'royalblue2'=>array(67,110,238), |
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'royalblue3'=>array(58,95,205), |
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'royalblue4'=>array(39,64,139), |
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'dodgerblue1'=>array(30,144,255), |
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'dodgerblue2'=>array(28,134,238), |
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'dodgerblue3'=>array(24,116,205), |
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'dodgerblue4'=>array(16,78,139), |
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'steelblue1'=>array(99,184,255), |
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'steelblue2'=>array(92,172,238), |
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'steelblue3'=>array(79,148,205), |
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'steelblue4'=>array(54,100,139), |
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'deepskyblue1'=>array(0,191,255), |
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'deepskyblue2'=>array(0,178,238), |
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'deepskyblue3'=>array(0,154,205), |
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'deepskyblue4'=>array(0,104,139), |
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'skyblue1'=>array(135,206,255), |
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'skyblue2'=>array(126,192,238), |
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'skyblue3'=>array(108,166,205), |
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'skyblue4'=>array(74,112,139), |
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'lightskyblue1'=>array(176,226,255), |
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'lightskyblue2'=>array(164,211,238), |
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'lightskyblue3'=>array(141,182,205), |
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'lightskyblue4'=>array(96,123,139), |
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'slategray1'=>array(198,226,255), |
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'slategray2'=>array(185,211,238), |
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'slategray3'=>array(159,182,205), |
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'slategray4'=>array(108,123,139), |
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'lightsteelblue1'=>array(202,225,255), |
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'lightsteelblue2'=>array(188,210,238), |
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'lightsteelblue3'=>array(162,181,205), |
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'lightsteelblue4'=>array(110,123,139), |
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'lightblue1'=>array(191,239,255), |
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'lightblue2'=>array(178,223,238), |
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'lightblue3'=>array(154,192,205), |
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'lightblue4'=>array(104,131,139), |
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'lightcyan1'=>array(224,255,255), |
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'lightcyan2'=>array(209,238,238), |
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'lightcyan3'=>array(180,205,205), |
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'lightcyan4'=>array(122,139,139), |
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'paleturquoise1'=>array(187,255,255), |
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'paleturquoise2'=>array(174,238,238), |
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'paleturquoise3'=>array(150,205,205), |
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'paleturquoise4'=>array(102,139,139), |
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'cadetblue1'=>array(152,245,255), |
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'cadetblue2'=>array(142,229,238), |
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'cadetblue3'=>array(122,197,205), |
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'cadetblue4'=>array(83,134,139), |
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'turquoise1'=>array(0,245,255), |
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'turquoise2'=>array(0,229,238), |
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'turquoise3'=>array(0,197,205), |
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'turquoise4'=>array(0,134,139), |
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'cyan1'=>array(0,255,255), |
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'cyan2'=>array(0,238,238), |
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'cyan3'=>array(0,205,205), |
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'cyan4'=>array(0,139,139), |
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'darkslategray1'=>array(151,255,255), |
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'darkslategray2'=>array(141,238,238), |
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'darkslategray3'=>array(121,205,205), |
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'darkslategray4'=>array(82,139,139), |
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'aquamarine1'=>array(127,255,212), |
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'aquamarine2'=>array(118,238,198), |
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'aquamarine3'=>array(102,205,170), |
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'aquamarine4'=>array(69,139,116), |
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'darkseagreen1'=>array(193,255,193), |
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'darkseagreen2'=>array(180,238,180), |
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'darkseagreen3'=>array(155,205,155), |
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'darkseagreen4'=>array(105,139,105), |
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'seagreen1'=>array(84,255,159), |
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'seagreen2'=>array(78,238,148), |
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'seagreen3'=>array(67,205,128), |
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'seagreen4'=>array(46,139,87), |
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'palegreen1'=>array(154,255,154), |
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'palegreen2'=>array(144,238,144), |
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'palegreen3'=>array(124,205,124), |
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'palegreen4'=>array(84,139,84), |
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'springgreen1'=>array(0,255,127), |
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'springgreen2'=>array(0,238,118), |
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'springgreen3'=>array(0,205,102), |
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'springgreen4'=>array(0,139,69), |
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'chartreuse1'=>array(127,255,0), |
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'chartreuse2'=>array(118,238,0), |
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'chartreuse3'=>array(102,205,0), |
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'chartreuse4'=>array(69,139,0), |
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'olivedrab1'=>array(192,255,62), |
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'olivedrab2'=>array(179,238,58), |
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'olivedrab3'=>array(154,205,50), |
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'olivedrab4'=>array(105,139,34), |
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'darkolivegreen1'=>array(202,255,112), |
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'darkolivegreen2'=>array(188,238,104), |
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'darkolivegreen3'=>array(162,205,90), |
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'darkolivegreen4'=>array(110,139,61), |
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'khaki1'=>array(255,246,143), |
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'khaki2'=>array(238,230,133), |
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'khaki3'=>array(205,198,115), |
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'khaki4'=>array(139,134,78), |
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'lightgoldenrod1'=>array(255,236,139), |
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'lightgoldenrod2'=>array(238,220,130), |
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'lightgoldenrod3'=>array(205,190,112), |
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'lightgoldenrod4'=>array(139,129,76), |
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'yellow1'=>array(255,255,0), |
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'yellow2'=>array(238,238,0), |
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'yellow3'=>array(205,205,0), |
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'yellow4'=>array(139,139,0), |
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'gold1'=>array(255,215,0), |
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'gold2'=>array(238,201,0), |
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'gold3'=>array(205,173,0), |
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'gold4'=>array(139,117,0), |
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'goldenrod1'=>array(255,193,37), |
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'goldenrod2'=>array(238,180,34), |
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'goldenrod3'=>array(205,155,29), |
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'goldenrod4'=>array(139,105,20), |
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'darkgoldenrod1'=>array(255,185,15), |
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'darkgoldenrod2'=>array(238,173,14), |
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'darkgoldenrod3'=>array(205,149,12), |
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'darkgoldenrod4'=>array(139,101,8), |
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'rosybrown1'=>array(255,193,193), |
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'rosybrown2'=>array(238,180,180), |
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'rosybrown3'=>array(205,155,155), |
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'rosybrown4'=>array(139,105,105), |
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'indianred1'=>array(255,106,106), |
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'indianred2'=>array(238,99,99), |
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'indianred3'=>array(205,85,85), |
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'indianred4'=>array(139,58,58), |
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'sienna1'=>array(255,130,71), |
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'sienna2'=>array(238,121,66), |
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'sienna3'=>array(205,104,57), |
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'sienna4'=>array(139,71,38), |
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'burlywood1'=>array(255,211,155), |
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'burlywood2'=>array(238,197,145), |
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'burlywood3'=>array(205,170,125), |
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'burlywood4'=>array(139,115,85), |
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'wheat1'=>array(255,231,186), |
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'wheat2'=>array(238,216,174), |
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'wheat3'=>array(205,186,150), |
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'wheat4'=>array(139,126,102), |
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'tan1'=>array(255,165,79), |
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'tan2'=>array(238,154,73), |
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'tan3'=>array(205,133,63), |
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'tan4'=>array(139,90,43), |
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'chocolate1'=>array(255,127,36), |
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'chocolate2'=>array(238,118,33), |
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'chocolate3'=>array(205,102,29), |
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'chocolate4'=>array(139,69,19), |
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'firebrick1'=>array(255,48,48), |
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'firebrick2'=>array(238,44,44), |
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'firebrick3'=>array(205,38,38), |
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'firebrick4'=>array(139,26,26), |
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'brown1'=>array(255,64,64), |
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'brown2'=>array(238,59,59), |
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'brown3'=>array(205,51,51), |
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'brown4'=>array(139,35,35), |
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'salmon1'=>array(255,140,105), |
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'salmon2'=>array(238,130,98), |
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'salmon3'=>array(205,112,84), |
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'salmon4'=>array(139,76,57), |
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'lightsalmon1'=>array(255,160,122), |
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'lightsalmon2'=>array(238,149,114), |
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'lightsalmon3'=>array(205,129,98), |
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'lightsalmon4'=>array(139,87,66), |
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'orange1'=>array(255,165,0), |
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'orange2'=>array(238,154,0), |
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'orange3'=>array(205,133,0), |
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'orange4'=>array(139,90,0), |
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'darkorange1'=>array(255,127,0), |
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'darkorange2'=>array(238,118,0), |
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'darkorange3'=>array(205,102,0), |
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'darkorange4'=>array(139,69,0), |
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'coral1'=>array(255,114,86), |
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'coral2'=>array(238,106,80), |
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'coral3'=>array(205,91,69), |
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'coral4'=>array(139,62,47), |
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'tomato1'=>array(255,99,71), |
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'tomato2'=>array(238,92,66), |
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'tomato3'=>array(205,79,57), |
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'tomato4'=>array(139,54,38), |
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'orangered1'=>array(255,69,0), |
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'orangered2'=>array(238,64,0), |
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'orangered3'=>array(205,55,0), |
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'orangered4'=>array(139,37,0), |
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'deeppink1'=>array(255,20,147), |
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'deeppink2'=>array(238,18,137), |
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'deeppink3'=>array(205,16,118), |
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'deeppink4'=>array(139,10,80), |
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'hotpink1'=>array(255,110,180), |
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'hotpink2'=>array(238,106,167), |
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'hotpink3'=>array(205,96,144), |
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'hotpink4'=>array(139,58,98), |
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'pink1'=>array(255,181,197), |
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'pink2'=>array(238,169,184), |
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'pink3'=>array(205,145,158), |
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'pink4'=>array(139,99,108), |
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'lightpink1'=>array(255,174,185), |
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'lightpink2'=>array(238,162,173), |
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'lightpink3'=>array(205,140,149), |
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'lightpink4'=>array(139,95,101), |
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'palevioletred1'=>array(255,130,171), |
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'palevioletred2'=>array(238,121,159), |
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'palevioletred3'=>array(205,104,137), |
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'palevioletred4'=>array(139,71,93), |
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'maroon1'=>array(255,52,179), |
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'maroon2'=>array(238,48,167), |
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'maroon3'=>array(205,41,144), |
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'maroon4'=>array(139,28,98), |
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'violetred1'=>array(255,62,150), |
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'violetred2'=>array(238,58,140), |
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'violetred3'=>array(205,50,120), |
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'violetred4'=>array(139,34,82), |
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'magenta1'=>array(255,0,255), |
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'magenta2'=>array(238,0,238), |
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'magenta3'=>array(205,0,205), |
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'magenta4'=>array(139,0,139), |
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'mediumred'=>array(140,34,34), |
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'orchid1'=>array(255,131,250), |
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'orchid2'=>array(238,122,233), |
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'orchid3'=>array(205,105,201), |
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'orchid4'=>array(139,71,137), |
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'plum1'=>array(255,187,255), |
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'plum2'=>array(238,174,238), |
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'plum3'=>array(205,150,205), |
|
'plum4'=>array(139,102,139), |
|
'mediumorchid1'=>array(224,102,255), |
|
'mediumorchid2'=>array(209,95,238), |
|
'mediumorchid3'=>array(180,82,205), |
|
'mediumorchid4'=>array(122,55,139), |
|
'darkorchid1'=>array(191,62,255), |
|
'darkorchid2'=>array(178,58,238), |
|
'darkorchid3'=>array(154,50,205), |
|
'darkorchid4'=>array(104,34,139), |
|
'purple1'=>array(155,48,255), |
|
'purple2'=>array(145,44,238), |
|
'purple3'=>array(125,38,205), |
|
'purple4'=>array(85,26,139), |
|
'mediumpurple1'=>array(171,130,255), |
|
'mediumpurple2'=>array(159,121,238), |
|
'mediumpurple3'=>array(137,104,205), |
|
'mediumpurple4'=>array(93,71,139), |
|
'thistle1'=>array(255,225,255), |
|
'thistle2'=>array(238,210,238), |
|
'thistle3'=>array(205,181,205), |
|
'thistle4'=>array(139,123,139), |
|
'gray1'=>array(10,10,10), |
|
'gray2'=>array(40,40,30), |
|
'gray3'=>array(70,70,70), |
|
'gray4'=>array(100,100,100), |
|
'gray5'=>array(130,130,130), |
|
'gray6'=>array(160,160,160), |
|
'gray7'=>array(190,190,190), |
|
'gray8'=>array(210,210,210), |
|
'gray9'=>array(240,240,240), |
|
'darkgray'=>array(100,100,100), |
|
'darkblue'=>array(0,0,139), |
|
'darkcyan'=>array(0,139,139), |
|
'darkmagenta'=>array(139,0,139), |
|
'darkred'=>array(139,0,0), |
|
'silver'=>array(192, 192, 192), |
|
'eggplant'=>array(144,176,168), |
|
'lightgreen'=>array(144,238,144)); |
|
} |
|
|
|
|
|
//---------------- |
|
// PUBLIC METHODS |
|
// Colors can be specified as either |
|
// 1. #xxxxxx HTML style |
|
// 2. "colorname" as a named color |
|
// 3. array(r,g,b) RGB triple |
|
// This function translates this to a native RGB format and returns an |
|
// RGB triple. |
|
|
|
function Color($aColor) { |
|
if (is_string($aColor)) { |
|
$matches = array(); |
|
// this regex will parse a color string and fill the $matches array as such: |
|
// 0: the full match if any |
|
// 1: a hex string preceded by a hash, can be 3 characters (#fff) or 6 (#ffffff) (4 or 5 also accepted but...) |
|
// 2,3,4: r,g,b values in hex if the first character of the string is # |
|
// 5: all alpha-numeric characters at the beginning of the string if string does not start with # |
|
// 6: alpha value prefixed by @ if supplied |
|
// 7: alpha value with @ stripped |
|
// 8: adjust value prefixed with : if supplied |
|
// 9: adjust value with : stripped |
|
$regex = '/(#([0-9a-fA-F]{1,2})([0-9a-fA-F]{1,2})([0-9a-fA-F]{1,2}))?([\w]+)?(@([\d\.,]+))?(:([\d\.,]+))?/'; |
|
if(!preg_match($regex, $aColor, $matches)) { |
|
JpGraphError::RaiseL(25078,$aColor);//(" Unknown color: $aColor"); |
|
} |
|
if(empty($matches[5])) { |
|
$r = strlen($matches[2]) == 1 ? $matches[2].$matches[2] : $matches[2]; |
|
$g = strlen($matches[3]) == 1 ? $matches[3].$matches[3] : $matches[3]; |
|
$b = strlen($matches[4]) == 1 ? $matches[4].$matches[4] : $matches[4]; |
|
$r = hexdec($r); |
|
$g = hexdec($g); |
|
$b = hexdec($b); |
|
}else { |
|
if(!isset($this->rgb_table[$matches[5]]) ) { |
|
JpGraphError::RaiseL(25078,$aColor);//(" Unknown color: $aColor"); |
|
} |
|
$r = $this->rgb_table[$matches[5]][0]; |
|
$g = $this->rgb_table[$matches[5]][1]; |
|
$b = $this->rgb_table[$matches[5]][2]; |
|
} |
|
$alpha = isset($matches[7]) ? str_replace(',','.',$matches[7]) : 0; |
|
$adj = isset($matches[9]) ? str_replace(',','.',$matches[9]) : 1.0; |
|
|
|
if( $adj < 0 ) { |
|
JpGraphError::RaiseL(25077);//('Adjustment factor for color must be > 0'); |
|
} |
|
|
|
// Scale adj so that an adj=2 always |
|
// makes the color 100% white (i.e. 255,255,255. |
|
// and adj=1 neutral and adj=0 black. |
|
if( $adj == 1) { |
|
return array($r,$g,$b,$alpha); |
|
} |
|
elseif( $adj > 1 ) { |
|
$m = ($adj-1.0)*(255-min(255,min($r,min($g,$b)))); |
|
return array(min(255,$r+$m), min(255,$g+$m), min(255,$b+$m),$alpha); |
|
} |
|
elseif( $adj < 1 ) { |
|
$m = ($adj-1.0)*max(255,max($r,max($g,$b))); |
|
return array(max(0,$r+$m), max(0,$g+$m), max(0,$b+$m),$alpha); |
|
} |
|
} elseif( is_array($aColor) ) { |
|
if(!isset($aColor[3])) $aColor[3] = 0; |
|
return $aColor; |
|
} |
|
else { |
|
JpGraphError::RaiseL(25079,$aColor,count($aColor));//(" Unknown color specification: $aColor , size=".count($aColor)); |
|
} |
|
} |
|
|
|
// Compare two colors |
|
// return true if equal |
|
function Equal($aCol1,$aCol2) { |
|
$c1 = $this->Color($aCol1); |
|
$c2 = $this->Color($aCol2); |
|
return $c1[0]==$c2[0] && $c1[1]==$c2[1] && $c1[2]==$c2[2] ; |
|
} |
|
|
|
// Allocate a new color in the current image |
|
// Return new color index, -1 if no more colors could be allocated |
|
function Allocate($aColor,$aAlpha=0.0) { |
|
list ($r, $g, $b, $a) = $this->color($aColor); |
|
// If alpha is specified in the color string then this |
|
// takes precedence over the second argument |
|
if( $a > 0 ) { |
|
$aAlpha = $a; |
|
} |
|
if( $aAlpha < 0 || $aAlpha > 1 ) { |
|
JpGraphError::RaiseL(25080);//('Alpha parameter for color must be between 0.0 and 1.0'); |
|
} |
|
return imagecolorresolvealpha($this->img, $r, $g, $b, round($aAlpha * 127)); |
|
} |
|
|
|
// Try to convert an array with three valid numbers to the corresponding hex array |
|
// This is currenly only used in processing the colors for barplots in order to be able |
|
// to handle the case where the color might be specified as an array of colros as well. |
|
// In that case we must be able to find out if an array of values should be interpretated as |
|
// a single color (specifeid as an RGB triple) |
|
static function tryHexConversion($aColor) { |
|
if( is_array( $aColor ) ) { |
|
if( count( $aColor ) == 3 ) { |
|
if( is_numeric($aColor[0]) && is_numeric($aColor[1]) && is_numeric($aColor[2]) ) { |
|
if( ($aColor[0] >= 0 && $aColor[0] <= 255) && |
|
($aColor[1] >= 0 && $aColor[1] <= 255) && |
|
($aColor[2] >= 0 && $aColor[2] <= 255) ) { |
|
return sprintf('#%02x%02x%02x',$aColor[0],$aColor[1],$aColor[2]); |
|
} |
|
} |
|
} |
|
} |
|
return $aColor; |
|
} |
|
|
|
// Return a RGB tripple corresponding to a position in the normal light spectrum |
|
// The argumen values is in the range [0, 1] where a value of 0 correponds to blue and |
|
// a value of 1 corresponds to red. Values in betwen is mapped to a linear interpolation |
|
// of the constituting colors in the visible color spectra. |
|
// The $aDynamicRange specified how much of the dynamic range we shold use |
|
// a value of 1.0 give the full dyanmic range and a lower value give more dark |
|
// colors. In the extreme of 0.0 then all colors will be black. |
|
static function GetSpectrum($aVal,$aDynamicRange=1.0) { |
|
if( $aVal < 0 || $aVal > 1.0001 ) { |
|
return array(0,0,0); // Invalid case - just return black |
|
} |
|
|
|
$sat = round(255*$aDynamicRange); |
|
$a = 0.25; |
|
if( $aVal <= 0.25 ) { |
|
return array(0, round($sat*$aVal/$a), $sat); |
|
} |
|
elseif( $aVal <= 0.5 ) { |
|
return array(0, $sat, round($sat-$sat*($aVal-0.25)/$a)); |
|
} |
|
elseif( $aVal <= 0.75 ) { |
|
return array(round($sat*($aVal-0.5)/$a), $sat, 0); |
|
} |
|
else { |
|
return array($sat, round($sat-$sat*($aVal-0.75)/$a), 0); |
|
} |
|
} |
|
|
|
} // Class |
|
|
|
?>
|
|
|