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Diffstat (limited to 'html/jpgraph/jpgraph_rgb.inc.php')
| -rw-r--r-- | html/jpgraph/jpgraph_rgb.inc.php | 615 |
1 files changed, 615 insertions, 0 deletions
diff --git a/html/jpgraph/jpgraph_rgb.inc.php b/html/jpgraph/jpgraph_rgb.inc.php new file mode 100644 index 0000000..5389261 --- /dev/null +++ b/html/jpgraph/jpgraph_rgb.inc.php @@ -0,0 +1,615 @@ +<?php +//======================================================================= +// File: JPGRAPH_RGB.INC.PHP +// Description: Class to handle RGb color space specification and +// named colors +// Created: 2001-01-08 (Refactored to separate file 2008-08-01) +// Ver: $Id: jpgraph_rgb.inc.php 1893 2009-10-02 23:15:25Z ljp $ +// +// Copyright (c) Asial Corporation. All rights reserved. +//======================================================================== + + +/*=================================================== +// CLASS RGB +// Description: Color definitions as RGB triples +//=================================================== +*/ + +class RGB { + public $rgb_table; + public $img; + + function __construct($aImg=null) { + $this->img = $aImg; + + // Conversion array between color names and RGB + $this->rgb_table = array( + 'aqua'=> array(0,255,255), + 'lime'=> array(0,255,0), + 'teal'=> array(0,128,128), + 'whitesmoke'=>array(245,245,245), + 'gainsboro'=>array(220,220,220), + 'oldlace'=>array(253,245,230), + 'linen'=>array(250,240,230), + 'antiquewhite'=>array(250,235,215), + 'papayawhip'=>array(255,239,213), + 'blanchedalmond'=>array(255,235,205), + 'bisque'=>array(255,228,196), + 'peachpuff'=>array(255,218,185), + 'navajowhite'=>array(255,222,173), + 'moccasin'=>array(255,228,181), + 'cornsilk'=>array(255,248,220), + 'ivory'=>array(255,255,240), + 'lemonchiffon'=>array(255,250,205), + 'seashell'=>array(255,245,238), + 'mintcream'=>array(245,255,250), + 'azure'=>array(240,255,255), + 'aliceblue'=>array(240,248,255), + 'lavender'=>array(230,230,250), + 'lavenderblush'=>array(255,240,245), + 'mistyrose'=>array(255,228,225), + 'white'=>array(255,255,255), + 'black'=>array(0,0,0), + 'darkslategray'=>array(47,79,79), + 'dimgray'=>array(105,105,105), + 'slategray'=>array(112,128,144), + 'lightslategray'=>array(119,136,153), + 'gray'=>array(190,190,190), + 'lightgray'=>array(211,211,211), + 'midnightblue'=>array(25,25,112), + 'navy'=>array(0,0,128), + 'indigo'=>array(75,0,130), + 'electricindigo'=>array(102,0,255), + 'deepindigo'=>array(138,43,226), + 'pigmentindigo'=>array(75,0,130), + 'indigodye'=>array(0,65,106), + 'cornflowerblue'=>array(100,149,237), + 'darkslateblue'=>array(72,61,139), + 'slateblue'=>array(106,90,205), + 'mediumslateblue'=>array(123,104,238), + 'lightslateblue'=>array(132,112,255), + 'mediumblue'=>array(0,0,205), + 'royalblue'=>array(65,105,225), + 'blue'=>array(0,0,255), + 'dodgerblue'=>array(30,144,255), + 'deepskyblue'=>array(0,191,255), + 'skyblue'=>array(135,206,235), + 'lightskyblue'=>array(135,206,250), + 'steelblue'=>array(70,130,180), + 'lightred'=>array(211,167,168), + 'lightsteelblue'=>array(176,196,222), + 'lightblue'=>array(173,216,230), + 'powderblue'=>array(176,224,230), + 'paleturquoise'=>array(175,238,238), + 'darkturquoise'=>array(0,206,209), + 'mediumturquoise'=>array(72,209,204), + 'turquoise'=>array(64,224,208), + 'cyan'=>array(0,255,255), + 'lightcyan'=>array(224,255,255), + 'cadetblue'=>array(95,158,160), + 'mediumaquamarine'=>array(102,205,170), + 'aquamarine'=>array(127,255,212), + 'darkgreen'=>array(0,100,0), + 'darkolivegreen'=>array(85,107,47), + 'darkseagreen'=>array(143,188,143), + 'seagreen'=>array(46,139,87), + 'mediumseagreen'=>array(60,179,113), + 'lightseagreen'=>array(32,178,170), + 'palegreen'=>array(152,251,152), + 'springgreen'=>array(0,255,127), + 'lawngreen'=>array(124,252,0), + 'green'=>array(0,255,0), + 'chartreuse'=>array(127,255,0), + 'mediumspringgreen'=>array(0,250,154), + 'greenyellow'=>array(173,255,47), + 'limegreen'=>array(50,205,50), + 'yellowgreen'=>array(154,205,50), + 'forestgreen'=>array(34,139,34), + 'olivedrab'=>array(107,142,35), + 'darkkhaki'=>array(189,183,107), + 'khaki'=>array(240,230,140), + 'palegoldenrod'=>array(238,232,170), + 'lightgoldenrodyellow'=>array(250,250,210), + 'lightyellow'=>array(255,255,200), + 'yellow'=>array(255,255,0), + 'gold'=>array(255,215,0), + 'lightgoldenrod'=>array(238,221,130), + 'goldenrod'=>array(218,165,32), + 'darkgoldenrod'=>array(184,134,11), + 'rosybrown'=>array(188,143,143), + 'indianred'=>array(205,92,92), + 'saddlebrown'=>array(139,69,19), + 'sienna'=>array(160,82,45), + 'peru'=>array(205,133,63), + 'burlywood'=>array(222,184,135), + 'beige'=>array(245,245,220), + 'wheat'=>array(245,222,179), + 'sandybrown'=>array(244,164,96), + 'tan'=>array(210,180,140), + 'chocolate'=>array(210,105,30), + 'firebrick'=>array(178,34,34), + 'brown'=>array(165,42,42), + 'darksalmon'=>array(233,150,122), + 'salmon'=>array(250,128,114), + 'lightsalmon'=>array(255,160,122), + 'orange'=>array(255,165,0), + 'darkorange'=>array(255,140,0), + 'coral'=>array(255,127,80), + 'lightcoral'=>array(240,128,128), + 'tomato'=>array(255,99,71), + 'orangered'=>array(255,69,0), + 'red'=>array(255,0,0), + 'hotpink'=>array(255,105,180), + 'deeppink'=>array(255,20,147), + 'pink'=>array(255,192,203), + 'lightpink'=>array(255,182,193), + 'palevioletred'=>array(219,112,147), + 'maroon'=>array(176,48,96), + 'mediumvioletred'=>array(199,21,133), + 'violetred'=>array(208,32,144), + 'magenta'=>array(255,0,255), + 'violet'=>array(238,130,238), + 'plum'=>array(221,160,221), + 'orchid'=>array(218,112,214), + 'mediumorchid'=>array(186,85,211), + 'darkorchid'=>array(153,50,204), + 'darkviolet'=>array(148,0,211), + 'blueviolet'=>array(138,43,226), + 'purple'=>array(160,32,240), + 'mediumpurple'=>array(147,112,219), + 'thistle'=>array(216,191,216), + 'snow1'=>array(255,250,250), + 'snow2'=>array(238,233,233), + 'snow3'=>array(205,201,201), + 'snow4'=>array(139,137,137), + 'seashell1'=>array(255,245,238), + 'seashell2'=>array(238,229,222), + 'seashell3'=>array(205,197,191), + 'seashell4'=>array(139,134,130), + 'AntiqueWhite1'=>array(255,239,219), + 'AntiqueWhite2'=>array(238,223,204), + 'AntiqueWhite3'=>array(205,192,176), + 'AntiqueWhite4'=>array(139,131,120), + 'bisque1'=>array(255,228,196), + 'bisque2'=>array(238,213,183), + 'bisque3'=>array(205,183,158), + 'bisque4'=>array(139,125,107), + 'peachPuff1'=>array(255,218,185), + 'peachpuff2'=>array(238,203,173), + 'peachpuff3'=>array(205,175,149), + 'peachpuff4'=>array(139,119,101), + 'navajowhite1'=>array(255,222,173), + 'navajowhite2'=>array(238,207,161), + 'navajowhite3'=>array(205,179,139), + 'navajowhite4'=>array(139,121,94), + 'lemonchiffon1'=>array(255,250,205), + 'lemonchiffon2'=>array(238,233,191), + 'lemonchiffon3'=>array(205,201,165), + 'lemonchiffon4'=>array(139,137,112), + 'ivory1'=>array(255,255,240), + 'ivory2'=>array(238,238,224), + 'ivory3'=>array(205,205,193), + 'ivory4'=>array(139,139,131), + 'honeydew'=>array(193,205,193), + 'lavenderblush1'=>array(255,240,245), + 'lavenderblush2'=>array(238,224,229), + 'lavenderblush3'=>array(205,193,197), + 'lavenderblush4'=>array(139,131,134), + 'mistyrose1'=>array(255,228,225), + 'mistyrose2'=>array(238,213,210), + 'mistyrose3'=>array(205,183,181), + 'mistyrose4'=>array(139,125,123), + 'azure1'=>array(240,255,255), + 'azure2'=>array(224,238,238), + 'azure3'=>array(193,205,205), + 'azure4'=>array(131,139,139), + 'slateblue1'=>array(131,111,255), + 'slateblue2'=>array(122,103,238), + 'slateblue3'=>array(105,89,205), + 'slateblue4'=>array(71,60,139), + 'royalblue1'=>array(72,118,255), + 'royalblue2'=>array(67,110,238), + 'royalblue3'=>array(58,95,205), + 'royalblue4'=>array(39,64,139), + 'dodgerblue1'=>array(30,144,255), + 'dodgerblue2'=>array(28,134,238), + 'dodgerblue3'=>array(24,116,205), + 'dodgerblue4'=>array(16,78,139), + 'steelblue1'=>array(99,184,255), + 'steelblue2'=>array(92,172,238), + 'steelblue3'=>array(79,148,205), + 'steelblue4'=>array(54,100,139), + 'deepskyblue1'=>array(0,191,255), + 'deepskyblue2'=>array(0,178,238), + 'deepskyblue3'=>array(0,154,205), + 'deepskyblue4'=>array(0,104,139), + 'skyblue1'=>array(135,206,255), + 'skyblue2'=>array(126,192,238), + 'skyblue3'=>array(108,166,205), + 'skyblue4'=>array(74,112,139), + 'lightskyblue1'=>array(176,226,255), + 'lightskyblue2'=>array(164,211,238), + 'lightskyblue3'=>array(141,182,205), + 'lightskyblue4'=>array(96,123,139), + 'slategray1'=>array(198,226,255), + 'slategray2'=>array(185,211,238), + 'slategray3'=>array(159,182,205), + 'slategray4'=>array(108,123,139), + 'lightsteelblue1'=>array(202,225,255), + 'lightsteelblue2'=>array(188,210,238), + 'lightsteelblue3'=>array(162,181,205), + 'lightsteelblue4'=>array(110,123,139), + 'lightblue1'=>array(191,239,255), + 'lightblue2'=>array(178,223,238), + 'lightblue3'=>array(154,192,205), + 'lightblue4'=>array(104,131,139), + 'lightcyan1'=>array(224,255,255), + 'lightcyan2'=>array(209,238,238), + 'lightcyan3'=>array(180,205,205), + 'lightcyan4'=>array(122,139,139), + 'paleturquoise1'=>array(187,255,255), + 'paleturquoise2'=>array(174,238,238), + 'paleturquoise3'=>array(150,205,205), + 'paleturquoise4'=>array(102,139,139), + 'cadetblue1'=>array(152,245,255), + 'cadetblue2'=>array(142,229,238), + 'cadetblue3'=>array(122,197,205), + 'cadetblue4'=>array(83,134,139), + 'turquoise1'=>array(0,245,255), + 'turquoise2'=>array(0,229,238), + 'turquoise3'=>array(0,197,205), + 'turquoise4'=>array(0,134,139), + 'cyan1'=>array(0,255,255), + 'cyan2'=>array(0,238,238), + 'cyan3'=>array(0,205,205), + 'cyan4'=>array(0,139,139), + 'darkslategray1'=>array(151,255,255), + 'darkslategray2'=>array(141,238,238), + 'darkslategray3'=>array(121,205,205), + 'darkslategray4'=>array(82,139,139), + 'aquamarine1'=>array(127,255,212), + 'aquamarine2'=>array(118,238,198), + 'aquamarine3'=>array(102,205,170), + 'aquamarine4'=>array(69,139,116), + 'darkseagreen1'=>array(193,255,193), + 'darkseagreen2'=>array(180,238,180), + 'darkseagreen3'=>array(155,205,155), + 'darkseagreen4'=>array(105,139,105), + 'seagreen1'=>array(84,255,159), + 'seagreen2'=>array(78,238,148), + 'seagreen3'=>array(67,205,128), + 'seagreen4'=>array(46,139,87), + 'palegreen1'=>array(154,255,154), + 'palegreen2'=>array(144,238,144), + 'palegreen3'=>array(124,205,124), + 'palegreen4'=>array(84,139,84), + 'springgreen1'=>array(0,255,127), + 'springgreen2'=>array(0,238,118), + 'springgreen3'=>array(0,205,102), + 'springgreen4'=>array(0,139,69), + 'chartreuse1'=>array(127,255,0), + 'chartreuse2'=>array(118,238,0), + 'chartreuse3'=>array(102,205,0), + 'chartreuse4'=>array(69,139,0), + 'olivedrab1'=>array(192,255,62), + 'olivedrab2'=>array(179,238,58), + 'olivedrab3'=>array(154,205,50), + 'olivedrab4'=>array(105,139,34), + 'darkolivegreen1'=>array(202,255,112), + 'darkolivegreen2'=>array(188,238,104), + 'darkolivegreen3'=>array(162,205,90), + 'darkolivegreen4'=>array(110,139,61), + 'khaki1'=>array(255,246,143), + 'khaki2'=>array(238,230,133), + 'khaki3'=>array(205,198,115), + 'khaki4'=>array(139,134,78), + 'lightgoldenrod1'=>array(255,236,139), + 'lightgoldenrod2'=>array(238,220,130), + 'lightgoldenrod3'=>array(205,190,112), + 'lightgoldenrod4'=>array(139,129,76), + 'yellow1'=>array(255,255,0), + 'yellow2'=>array(238,238,0), + 'yellow3'=>array(205,205,0), + 'yellow4'=>array(139,139,0), + 'gold1'=>array(255,215,0), + 'gold2'=>array(238,201,0), + 'gold3'=>array(205,173,0), + 'gold4'=>array(139,117,0), + 'goldenrod1'=>array(255,193,37), + 'goldenrod2'=>array(238,180,34), + 'goldenrod3'=>array(205,155,29), + 'goldenrod4'=>array(139,105,20), + 'darkgoldenrod1'=>array(255,185,15), + 'darkgoldenrod2'=>array(238,173,14), + 'darkgoldenrod3'=>array(205,149,12), + 'darkgoldenrod4'=>array(139,101,8), + 'rosybrown1'=>array(255,193,193), + 'rosybrown2'=>array(238,180,180), + 'rosybrown3'=>array(205,155,155), + 'rosybrown4'=>array(139,105,105), + 'indianred1'=>array(255,106,106), + 'indianred2'=>array(238,99,99), + 'indianred3'=>array(205,85,85), + 'indianred4'=>array(139,58,58), + 'sienna1'=>array(255,130,71), + 'sienna2'=>array(238,121,66), + 'sienna3'=>array(205,104,57), + 'sienna4'=>array(139,71,38), + 'burlywood1'=>array(255,211,155), + 'burlywood2'=>array(238,197,145), + 'burlywood3'=>array(205,170,125), + 'burlywood4'=>array(139,115,85), + 'wheat1'=>array(255,231,186), + 'wheat2'=>array(238,216,174), + 'wheat3'=>array(205,186,150), + 'wheat4'=>array(139,126,102), + 'tan1'=>array(255,165,79), + 'tan2'=>array(238,154,73), + 'tan3'=>array(205,133,63), + 'tan4'=>array(139,90,43), + 'chocolate1'=>array(255,127,36), + 'chocolate2'=>array(238,118,33), + 'chocolate3'=>array(205,102,29), + 'chocolate4'=>array(139,69,19), + 'firebrick1'=>array(255,48,48), + 'firebrick2'=>array(238,44,44), + 'firebrick3'=>array(205,38,38), + 'firebrick4'=>array(139,26,26), + 'brown1'=>array(255,64,64), + 'brown2'=>array(238,59,59), + 'brown3'=>array(205,51,51), + 'brown4'=>array(139,35,35), + 'salmon1'=>array(255,140,105), + 'salmon2'=>array(238,130,98), + 'salmon3'=>array(205,112,84), + 'salmon4'=>array(139,76,57), + 'lightsalmon1'=>array(255,160,122), + 'lightsalmon2'=>array(238,149,114), + 'lightsalmon3'=>array(205,129,98), + 'lightsalmon4'=>array(139,87,66), + 'orange1'=>array(255,165,0), + 'orange2'=>array(238,154,0), + 'orange3'=>array(205,133,0), + 'orange4'=>array(139,90,0), + 'darkorange1'=>array(255,127,0), + 'darkorange2'=>array(238,118,0), + 'darkorange3'=>array(205,102,0), + 'darkorange4'=>array(139,69,0), + 'coral1'=>array(255,114,86), + 'coral2'=>array(238,106,80), + 'coral3'=>array(205,91,69), + 'coral4'=>array(139,62,47), + 'tomato1'=>array(255,99,71), + 'tomato2'=>array(238,92,66), + 'tomato3'=>array(205,79,57), + 'tomato4'=>array(139,54,38), + 'orangered1'=>array(255,69,0), + 'orangered2'=>array(238,64,0), + 'orangered3'=>array(205,55,0), + 'orangered4'=>array(139,37,0), + 'deeppink1'=>array(255,20,147), + 'deeppink2'=>array(238,18,137), + 'deeppink3'=>array(205,16,118), + 'deeppink4'=>array(139,10,80), + 'hotpink1'=>array(255,110,180), + 'hotpink2'=>array(238,106,167), + 'hotpink3'=>array(205,96,144), + 'hotpink4'=>array(139,58,98), + 'pink1'=>array(255,181,197), + 'pink2'=>array(238,169,184), + 'pink3'=>array(205,145,158), + 'pink4'=>array(139,99,108), + 'lightpink1'=>array(255,174,185), + 'lightpink2'=>array(238,162,173), + 'lightpink3'=>array(205,140,149), + 'lightpink4'=>array(139,95,101), + 'palevioletred1'=>array(255,130,171), + 'palevioletred2'=>array(238,121,159), + 'palevioletred3'=>array(205,104,137), + 'palevioletred4'=>array(139,71,93), + 'maroon1'=>array(255,52,179), + 'maroon2'=>array(238,48,167), + 'maroon3'=>array(205,41,144), + 'maroon4'=>array(139,28,98), + 'violetred1'=>array(255,62,150), + 'violetred2'=>array(238,58,140), + 'violetred3'=>array(205,50,120), + 'violetred4'=>array(139,34,82), + 'magenta1'=>array(255,0,255), + 'magenta2'=>array(238,0,238), + 'magenta3'=>array(205,0,205), + 'magenta4'=>array(139,0,139), + 'mediumred'=>array(140,34,34), + 'orchid1'=>array(255,131,250), + 'orchid2'=>array(238,122,233), + 'orchid3'=>array(205,105,201), + 'orchid4'=>array(139,71,137), + 'plum1'=>array(255,187,255), + 'plum2'=>array(238,174,238), + '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 + +?> |