<?php
//=======================================================================
// File:	GD_IMAGE.INC.PHP
// Description:	GD Instance of Image class
// Created: 	2006-05-06
// Author:	Johan Persson (johanp@aditus.nu)
// Ver:		$Id$
//
// Copyright (c) Aditus Consulting. All rights reserved.
//========================================================================

// TTF Font families
DEFINE("FF_COURIER",10);
DEFINE("FF_VERDANA",11);
DEFINE("FF_TIMES",12);
DEFINE("FF_COMIC",14);
DEFINE("FF_ARIAL",15);
DEFINE("FF_GEORGIA",16);
DEFINE("FF_TREBUCHE",17);

// Gnome Vera font
// Available from http://www.gnome.org/fonts/
DEFINE("FF_VERA",19);
DEFINE("FF_VERAMONO",20);
DEFINE("FF_VERASERIF",21);

// Chinese font
DEFINE("FF_SIMSUN",30);
DEFINE("FF_CHINESE",31);
DEFINE("FF_BIG5",31);

// Japanese font
DEFINE("FF_MINCHO",40);
DEFINE("FF_PMINCHO",41);
DEFINE("FF_GOTHIC",42);
DEFINE("FF_PGOTHIC",43);

// Limits for TTF fonts
DEFINE('_FF_FIRST',10);
DEFINE('_FF_LAST',43);

// Older deprecated fonts 
DEFINE("FF_BOOK",91);    // Deprecated fonts from 1.9
DEFINE("FF_HANDWRT",92); // Deprecated fonts from 1.9

// TTF Font styles
DEFINE("FS_NORMAL",9001);
DEFINE("FS_BOLD",9002);
DEFINE("FS_ITALIC",9003);
DEFINE("FS_BOLDIT",9004);
DEFINE("FS_BOLDITALIC",9004);

//Definitions for internal font, new style
DEFINE("FF_FONT0",1);
DEFINE("FF_FONT1",2);
DEFINE("FF_FONT2",4);


//===================================================
// CLASS RGB
// Description: Color definitions as RGB triples
//===================================================
class RGB {
    var $rgb_table;
    var $img;
    function RGB(&$aImg) {
	$this->img = &$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),
	    "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)) {
	    // Strip of any alpha factor
	    $pos = strpos($aColor,'@');
	    if( $pos === false ) {
		$alpha = 0;
	    }
	    else {
		$pos2 = strpos($aColor,':');
		if( $pos2===false ) 
		    $pos2 = $pos-1; // Sentinel
		if( $pos > $pos2 ) {
		    $alpha = substr($aColor,$pos+1);
		    $aColor = substr($aColor,0,$pos);
		}
		else {
		    $alpha = substr($aColor,$pos+1,$pos2-$pos-1);
		    $aColor = substr($aColor,0,$pos).substr($aColor,$pos2);
		}
	    }

	    // Extract potential adjustment figure at end of color
	    // specification
	    $pos = strpos($aColor,":");
	    if( $pos === false ) {
		$adj = 1.0;
	    }
	    else {
		$adj = 0.0 + substr($aColor,$pos+1);
		$aColor = substr($aColor,0,$pos);
	    }
	    if( $adj < 0 )
		JpGraphError::RaiseL(25077);//('Adjustment factor for color must be > 0');

	    if (substr($aColor, 0, 1) == "#") {
		$r = hexdec(substr($aColor, 1, 2));
		$g = hexdec(substr($aColor, 3, 2));
		$b = hexdec(substr($aColor, 5, 2));
	    } else {
      		if(!isset($this->rgb_table[$aColor]) )
		    JpGraphError::RaiseL(25078,$aColor);//(" Unknown color: $aColor");
		$tmp=$this->rgb_table[$aColor];
		$r = $tmp[0];
		$g = $tmp[1];
		$b = $tmp[2];
	    }
	    // 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 ) {
		$m = ($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);
	    }
	    else {
		return array($r,$g,$b,$alpha);
	    }

	} elseif( is_array($aColor) ) {
	    if( count($aColor)==3 ) {
		$aColor[3]=0;
		return $aColor;
	    }
	    else
		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);
	if( $c1[0]==$c2[0] && $c1[1]==$c2[1] && $c1[2]==$c2[2] )
	    return true;
	else
	    return false;
    }
	
    // 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( $GLOBALS['gd2'] ) {
	    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));
	} else {
	    $index = imagecolorexact($this->img, $r, $g, $b);
	    if ($index == -1) {
      		$index = imagecolorallocate($this->img, $r, $g, $b);
      		if( USE_APPROX_COLORS && $index == -1 )
		    $index = imagecolorresolve($this->img, $r, $g, $b);
	    } 
	    return $index;
	}
    }
} // Class

	
//===================================================
// CLASS Image
// Description: Wrapper class with some goodies to form the
// Interface to low level image drawing routines.
//===================================================
class Image {
    var $img_format;
    var $expired=true;
    var $img=null;
    var $left_margin=30,$right_margin=20,$top_margin=20,$bottom_margin=30;
    var $plotwidth=0,$plotheight=0;
    var $rgb=null;
    var $current_color,$current_color_name;
    var $lastx=0, $lasty=0;
    var $width=0, $height=0;
    var $line_weight=1;
    var $line_style=1;	// Default line style is solid
    var $obs_list=array();
    var $font_size=12,$font_family=FF_FONT1, $font_style=FS_NORMAL;
    var $font_file='';
    var $text_halign="left",$text_valign="bottom";
    var $ttf=null;
    var $use_anti_aliasing=false;
    var $quality=null;
    var $colorstack=array(),$colorstackidx=0;
    var $canvascolor = 'white' ;
    var $langconv = null ;

    //---------------
    // CONSTRUCTOR
    function Image($aWidth,$aHeight,$aFormat=DEFAULT_GFORMAT) {
	$this->CreateImgCanvas($aWidth,$aHeight);
	$this->SetAutoMargin();		

	if( !$this->SetImgFormat($aFormat) ) {
	    JpGraphError::RaiseL(25081,$aFormat);//("JpGraph: Selected graphic format is either not supported or unknown [$aFormat]");
	}
	$this->ttf = new TTF();
	$this->langconv = new LanguageConv();
    }

    // Should we use anti-aliasing. Note: This really slows down graphics!
    function SetAntiAliasing() {
	$this->use_anti_aliasing=true;
    }

    function CreateRawCanvas($aWidth=0,$aHeight=0) {
	if( $aWidth <= 1 || $aHeight <= 1 ) {
	    JpGraphError::RaiseL(25082,$aWidth,$aHeight);//("Illegal sizes specified for width or height when creating an image, (width=$aWidth, height=$aHeight)");
	}
	if( @$GLOBALS['gd2']==true && USE_TRUECOLOR ) {
	    $this->img = @imagecreatetruecolor($aWidth, $aHeight);
	    if( $this->img < 1 ) {
		JpGraphError::RaiseL(25126);
		//die("Can't create truecolor image. Check that you really have GD2 library installed.");
	    }
	    $this->SetAlphaBlending();
	} else {
	    $this->img = @imagecreate($aWidth, $aHeight);	
	    if( $this->img < 1 ) {
		JpGraphError::RaiseL(25126);
		//die("<b>JpGraph Error:</b> Can't create image. Check that you really have the GD library installed.");
	    }
	}
	if( $this->rgb != null ) 
	    $this->rgb->img = $this->img ;
	else
	    $this->rgb = new RGB($this->img);				
    }

    function CloneCanvasH() {
	$oldimage = $this->img;
	$this->CreateRawCanvas($this->width,$this->height);
	imagecopy($this->img,$oldimage,0,0,0,0,$this->width,$this->height);
	return $oldimage;
    }
    
    function CreateImgCanvas($aWidth=0,$aHeight=0) {

	$old = array($this->img,$this->width,$this->height);
	
	$aWidth = round($aWidth);
	$aHeight = round($aHeight);

	$this->width=$aWidth;
	$this->height=$aHeight;		

	
	if( $aWidth==0 || $aHeight==0 ) {
	    // We will set the final size later. 
	    // Note: The size must be specified before any other
	    // img routines that stroke anything are called.
	    $this->img = null;
	    $this->rgb = null;
	    return $old;
	}
	
	$this->CreateRawCanvas($aWidth,$aHeight);
		
	// Set canvas color (will also be the background color for a 
	// a pallett image
	$this->SetColor($this->canvascolor);	
	$this->FilledRectangle(0,0,$aWidth,$aHeight);

	return $old ;
    }

    function CopyCanvasH($aToHdl,$aFromHdl,$aToX,$aToY,$aFromX,$aFromY,$aWidth,$aHeight,$aw=-1,$ah=-1) {
	if( $aw === -1 ) {
	    $aw = $aWidth;
	    $ah = $aHeight;
	    $f = 'imagecopyresized';
	}
	else {
	    $f = $GLOBALS['copyfunc'] ;
	}
	$f($aToHdl,$aFromHdl,
	   $aToX,$aToY,$aFromX,$aFromY, $aWidth,$aHeight,$aw,$ah);
    }

    function Copy($fromImg,$toX,$toY,$fromX,$fromY,$toWidth,$toHeight,$fromWidth=-1,$fromHeight=-1) {
	$this->CopyCanvasH($this->img,$fromImg,$toX,$toY,$fromX,$fromY,
			   $toWidth,$toHeight,$fromWidth,$fromHeight);
    }

    function CopyMerge($fromImg,$toX,$toY,$fromX,$fromY,$toWidth,$toHeight,$fromWidth=-1,$fromHeight=-1,$aMix=100) {
	if( $aMix == 100 ) {
	    $this->CopyCanvasH($this->img,$fromImg,
			       $toX,$toY,$fromX,$fromY,$toWidth,$toHeight,$fromWidth,$fromHeight);
	}
	else {
	    if( ($fromWidth  != -1 && ($fromWidth != $toWidth))  ||
		($fromHeight != -1 && ($fromHeight != $fromHeight)) ) {
		// Create a new canvas that will hold the re-scaled original from image
		if( $toWidth <= 1 || $toHeight <= 1 ) {
		    JpGraphError::RaiseL(25083);//('Illegal image size when copying image. Size for copied to image is 1 pixel or less.');
		}
		if( @$GLOBALS['gd2']==true && USE_TRUECOLOR ) {
		    $tmpimg = @imagecreatetruecolor($toWidth, $toHeight);
		} else {
		    $tmpimg = @imagecreate($toWidth, $toHeight);	
		}	    
		if( $tmpimg < 1 ) {
		    JpGraphError::RaiseL(25084);//('Failed to create temporary GD canvas. Out of memory ?');
		}
		$this->CopyCanvasH($tmpimg,$fromImg,0,0,0,0,
				   $toWidth,$toHeight,$fromWidth,$fromHeight);
		$fromImg = $tmpimg;
	    }
	    imagecopymerge($this->img,$fromImg,$toX,$toY,$fromX,$fromY,$toWidth,$toHeight,$aMix);
	}
    }

    function GetWidth($aImg=null) {
	if( $aImg === null ) 
	    $aImg = $this->img;
	return imagesx($aImg);
    }

    function GetHeight($aImg=null) {
	if( $aImg === null ) 
	    $aImg = $this->img;
	return imagesy($aImg);
    }
    
    function CreateFromString($aStr) {
	$img = imagecreatefromstring($aStr);
	if( $img === false ) {
	    JpGraphError::RaiseL(25085);//('An image can not be created from the supplied string. It is either in a format not supported or the string is representing an corrupt image.');
	}
	return $img;
    }

    function SetCanvasH($aHdl) {
	$this->img = $aHdl;
	$this->rgb->img = $aHdl;
    }

    function SetCanvasColor($aColor) {
	$this->canvascolor = $aColor ;
    }

    function SetAlphaBlending($aFlg=true) {
	if( $GLOBALS['gd2'] )
	    ImageAlphaBlending($this->img,$aFlg);
	else 
	    JpGraphError::RaiseL(25086);//('You only seem to have GD 1.x installed. To enable Alphablending requires GD 2.x or higher. Please install GD or make sure the constant USE_GD2 is specified correctly to reflect your installation. By default it tries to autodetect what version of GD you have installed. On some very rare occasions it may falsely detect GD2 where only GD1 is installed. You must then set USE_GD2 to false.');
    }

	
    function SetAutoMargin() {	
	GLOBAL $gJpgBrandTiming;
	$min_bm=10;
	/*
	if( $gJpgBrandTiming )
	    $min_bm=15;		
	*/
	$lm = min(40,$this->width/7);
	$rm = min(20,$this->width/10);
	$tm = max(20,$this->height/7);
	$bm = max($min_bm,$this->height/7);
	$this->SetMargin($lm,$rm,$tm,$bm);		
    }

				
    //---------------
    // PUBLIC METHODS	
	
    function SetFont($family,$style=FS_NORMAL,$size=10) {
	$this->font_family=$family;
	$this->font_style=$style;
	$this->font_size=$size;
	$this->font_file='';
	if( ($this->font_family==FF_FONT1 || $this->font_family==FF_FONT2) && $this->font_style==FS_BOLD ){
	    ++$this->font_family;
	}
	if( $this->font_family > FF_FONT2+1 ) { // A TTF font so get the font file

	    // Check that this PHP has support for TTF fonts
	    if( !function_exists('imagettfbbox') ) {
		JpGraphError::RaiseL(25087);//('This PHP build has not been configured with TTF support. You need to recompile your PHP installation with FreeType support.');
	    }
	    $this->font_file = $this->ttf->File($this->font_family,$this->font_style);
	}
    }

    // Get the specific height for a text string
    function GetTextHeight($txt="",$angle=0) {
	$tmp = split("\n",$txt);
	$n = count($tmp);
	$m=0;
	for($i=0; $i< $n; ++$i)
	    $m = max($m,strlen($tmp[$i]));

	if( $this->font_family <= FF_FONT2+1 ) {
	    if( $angle==0 ) {
		$h = imagefontheight($this->font_family);
		if( $h === false ) {
		    JpGraphError::RaiseL(25088);//('You have a misconfigured GD font support. The call to imagefontwidth() fails.');
		}

		return $n*$h;
	    }
	    else {
		$w = @imagefontwidth($this->font_family);
		if( $w === false ) {
		    JpGraphError::RaiseL(25088);//('You have a misconfigured GD font support. The call to imagefontwidth() fails.');
		}

		return $m*$w;
	    }
	}
	else {
	    $bbox = $this->GetTTFBBox($txt,$angle);
	    return $bbox[1]-$bbox[5];
	}
    }
	
    // Estimate font height
    function GetFontHeight($angle=0) {
	$txt = "XOMg";
	return $this->GetTextHeight($txt,$angle);
    }
	
    // Approximate font width with width of letter "O"
    function GetFontWidth($angle=0) {
	$txt = 'O';
	return $this->GetTextWidth($txt,$angle);
    }
	
    // Get actual width of text in absolute pixels
    function GetTextWidth($txt,$angle=0) {

	$tmp = split("\n",$txt);
	$n = count($tmp);
	if( $this->font_family <= FF_FONT2+1 ) {

	    $m=0;
	    for($i=0; $i < $n; ++$i) {
		$l=strlen($tmp[$i]);
		if( $l > $m ) {
		    $m = $l;
		}
	    }

	    if( $angle==0 ) {
		$w = @imagefontwidth($this->font_family);
		if( $w === false ) {
		    JpGraphError::RaiseL(25088);//('You have a misconfigured GD font support. The call to imagefontwidth() fails.');
		}
		return $m*$w;
	    }
	    else {
		// 90 degrees internal so height becomes width
		$h = @imagefontheight($this->font_family); 
		if( $h === false ) {
		    JpGraphError::RaiseL(25089);//('You have a misconfigured GD font support. The call to imagefontheight() fails.');
		}
		return $n*$h;
	    }
	}
	else {
	    // For TTF fonts we must walk through a lines and find the 
	    // widest one which we use as the width of the multi-line
	    // paragraph
	    $m=0;
	    for( $i=0; $i < $n; ++$i ) {
		$bbox = $this->GetTTFBBox($tmp[$i],$angle);
		$mm =  $bbox[2] - $bbox[0];
		if( $mm > $m ) 
		    $m = $mm;
	    }
	    return $m;
	}
    }
	
    // Draw text with a box around it
    function StrokeBoxedText($x,$y,$txt,$dir=0,$fcolor="white",$bcolor="black",
			     $shadowcolor=false,$paragraph_align="left",
			     $xmarg=6,$ymarg=4,$cornerradius=0,$dropwidth=3) {

	if( !is_numeric($dir) ) {
	    if( $dir=="h" ) $dir=0;
	    elseif( $dir=="v" ) $dir=90;
	    else JpGraphError::RaiseL(25090,$dir);//(" Unknown direction specified in call to StrokeBoxedText() [$dir]");
	}
		
	if( $this->font_family >= FF_FONT0 && $this->font_family <= FF_FONT2+1) {	
	    $width=$this->GetTextWidth($txt,$dir) ;
	    $height=$this->GetTextHeight($txt,$dir) ;
	}
	else {
	    $width=$this->GetBBoxWidth($txt,$dir) ;
	    $height=$this->GetBBoxHeight($txt,$dir) ;
	}

	$height += 2*$ymarg;
	$width  += 2*$xmarg;

	if( $this->text_halign=="right" ) $x -= $width;
	elseif( $this->text_halign=="center" ) $x -= $width/2;
	if( $this->text_valign=="bottom" ) $y -= $height;
	elseif( $this->text_valign=="center" ) $y -= $height/2;
	
	if( $shadowcolor ) {
	    $this->PushColor($shadowcolor);
	    $this->FilledRoundedRectangle($x-$xmarg+$dropwidth,$y-$ymarg+$dropwidth,
					  $x+$width+$dropwidth,$y+$height-$ymarg+$dropwidth,
					  $cornerradius);
	    $this->PopColor();
	    $this->PushColor($fcolor);
	    $this->FilledRoundedRectangle($x-$xmarg,$y-$ymarg,
					  $x+$width,$y+$height-$ymarg,
					  $cornerradius);		
	    $this->PopColor();
	    $this->PushColor($bcolor);
	    $this->RoundedRectangle($x-$xmarg,$y-$ymarg,
				    $x+$width,$y+$height-$ymarg,$cornerradius);
	    $this->PopColor();
	}
	else {
	    if( $fcolor ) {
		$oc=$this->current_color;
		$this->SetColor($fcolor);
		$this->FilledRoundedRectangle($x-$xmarg,$y-$ymarg,$x+$width,$y+$height-$ymarg,$cornerradius);
		$this->current_color=$oc;
	    }
	    if( $bcolor ) {
		$oc=$this->current_color;
		$this->SetColor($bcolor);			
		$this->RoundedRectangle($x-$xmarg,$y-$ymarg,$x+$width,$y+$height-$ymarg,$cornerradius);
		$this->current_color=$oc;			
	    }
	}
		
	$h=$this->text_halign;
	$v=$this->text_valign;
	$this->SetTextAlign("left","top");
	$this->StrokeText($x, $y, $txt, $dir, $paragraph_align);
	$bb = array($x-$xmarg,$y+$height-$ymarg,$x+$width,$y+$height-$ymarg,
		    $x+$width,$y-$ymarg,$x-$xmarg,$y-$ymarg);
	$this->SetTextAlign($h,$v);
	return $bb;
    }

    // Set text alignment	
    function SetTextAlign($halign,$valign="bottom") {
	$this->text_halign=$halign;
	$this->text_valign=$valign;
    }
	

    function _StrokeBuiltinFont($x,$y,$txt,$dir=0,$paragraph_align="left",&$aBoundingBox,$aDebug=false) {

	if( is_numeric($dir) && $dir!=90 && $dir!=0) 
	    JpGraphError::RaiseL(25091);//(" Internal font does not support drawing text at arbitrary angle. Use TTF fonts instead.");

	$h=$this->GetTextHeight($txt);
	$fh=$this->GetFontHeight();
	$w=$this->GetTextWidth($txt);
	
	if( $this->text_halign=="right") 				
	    $x -= $dir==0 ? $w : $h;
	elseif( $this->text_halign=="center" ) {
	    // For center we subtract 1 pixel since this makes the middle
	    // be prefectly in the middle
	    $x -= $dir==0 ? $w/2-1 : $h/2;
	}
	if( $this->text_valign=="top" )
	    $y += $dir==0 ? $h : $w;
	elseif( $this->text_valign=="center" ) 				
	    $y += $dir==0 ? $h/2 : $w/2;
	
	if( $dir==90 ) {
	    imagestringup($this->img,$this->font_family,$x,$y,$txt,$this->current_color);
	    $aBoundingBox = array(round($x),round($y),round($x),round($y-$w),round($x+$h),round($y-$w),round($x+$h),round($y));
            if( $aDebug ) {
		// Draw bounding box
		$this->PushColor('green');
		$this->Polygon($aBoundingBox,true);
		$this->PopColor();
	    }
	}
	else {
	    if( ereg("\n",$txt) ) { 
		$tmp = split("\n",$txt);
		for($i=0; $i < count($tmp); ++$i) {
		    $w1 = $this->GetTextWidth($tmp[$i]);
		    if( $paragraph_align=="left" ) {
			imagestring($this->img,$this->font_family,$x,$y-$h+1+$i*$fh,$tmp[$i],$this->current_color);
		    }
		    elseif( $paragraph_align=="right" ) {
			imagestring($this->img,$this->font_family,$x+($w-$w1),
				    $y-$h+1+$i*$fh,$tmp[$i],$this->current_color);
		    }
		    else {
			imagestring($this->img,$this->font_family,$x+$w/2-$w1/2,
				    $y-$h+1+$i*$fh,$tmp[$i],$this->current_color);
		    }
		}
	    } 
	    else {
		//Put the text
		imagestring($this->img,$this->font_family,$x,$y-$h+1,$txt,$this->current_color);
	    }
            if( $aDebug ) {
		// Draw the bounding rectangle and the bounding box
		$p1 = array(round($x),round($y),round($x),round($y-$h),round($x+$w),round($y-$h),round($x+$w),round($y));
		
		// Draw bounding box
		$this->PushColor('green');
		$this->Polygon($p1,true);
		$this->PopColor();

            }
	    $aBoundingBox=array(round($x),round($y),round($x),round($y-$h),round($x+$w),round($y-$h),round($x+$w),round($y));
	}
    }

    function AddTxtCR($aTxt) {
	// If the user has just specified a '\n'
	// instead of '\n\t' we have to add '\r' since
	// the width will be too muchy otherwise since when
	// we print we stroke the individually lines by hand.
	$e = explode("\n",$aTxt);
	$n = count($e);
	for($i=0; $i<$n; ++$i) {
	    $e[$i]=str_replace("\r","",$e[$i]);
	}
	return implode("\n\r",$e);
    }

    function GetTTFBBox($aTxt,$aAngle=0) {
	$bbox = @ImageTTFBBox($this->font_size,$aAngle,$this->font_file,$aTxt);
	if( $bbox === false ) {
	    JpGraphError::RaiseL(25092,$this->font_file);
//("There is either a configuration problem with TrueType or a problem reading font file (".$this->font_file."). Make sure file exists and is in a readable place for the HTTP process. (If 'basedir' restriction is enabled in PHP then the font file must be located in the document root.). It might also be a wrongly installed FreeType library. Try uppgrading to at least FreeType 2.1.13 and recompile GD with the correct setup so it can find the new FT library.");
	}
	return $bbox;
    }

    function GetBBoxTTF($aTxt,$aAngle=0) {
	// Normalize the bounding box to become a minimum
	// enscribing rectangle

	$aTxt = $this->AddTxtCR($aTxt);

	if( !is_readable($this->font_file) ) {
	    JpGraphError::RaiseL(25093,$this->font_file);
//('Can not read font file ('.$this->font_file.') in call to Image::GetBBoxTTF. Please make sure that you have set a font before calling this method and that the font is installed in the TTF directory.');
	}
	$bbox = $this->GetTTFBBox($aTxt,$aAngle);

	if( $aAngle==0 ) 
	    return $bbox;
	if( $aAngle >= 0 ) {
	    if(  $aAngle <= 90 ) { //<=0		
		$bbox = array($bbox[6],$bbox[1],$bbox[2],$bbox[1],
			      $bbox[2],$bbox[5],$bbox[6],$bbox[5]);
	    }
	    elseif(  $aAngle <= 180 ) { //<= 2
		$bbox = array($bbox[4],$bbox[7],$bbox[0],$bbox[7],
			      $bbox[0],$bbox[3],$bbox[4],$bbox[3]);
	    }
	    elseif(  $aAngle <= 270 )  { //<= 3
		$bbox = array($bbox[2],$bbox[5],$bbox[6],$bbox[5],
			      $bbox[6],$bbox[1],$bbox[2],$bbox[1]);
	    }
	    else {
		$bbox = array($bbox[0],$bbox[3],$bbox[4],$bbox[3],
			      $bbox[4],$bbox[7],$bbox[0],$bbox[7]);
	    }
	}
	elseif(  $aAngle < 0 ) {
	    if( $aAngle <= -270 ) { // <= -3
		$bbox = array($bbox[6],$bbox[1],$bbox[2],$bbox[1],
			      $bbox[2],$bbox[5],$bbox[6],$bbox[5]);
	    }
	    elseif( $aAngle <= -180 ) { // <= -2
		$bbox = array($bbox[0],$bbox[3],$bbox[4],$bbox[3],
			      $bbox[4],$bbox[7],$bbox[0],$bbox[7]);
	    }
	    elseif( $aAngle <= -90 ) { // <= -1
		$bbox = array($bbox[2],$bbox[5],$bbox[6],$bbox[5],
			      $bbox[6],$bbox[1],$bbox[2],$bbox[1]);
	    }
	    else {
		$bbox = array($bbox[0],$bbox[3],$bbox[4],$bbox[3],
			      $bbox[4],$bbox[7],$bbox[0],$bbox[7]);
	    }
	}	
	return $bbox;
    }

    function GetBBoxHeight($aTxt,$aAngle=0) {
	$box = $this->GetBBoxTTF($aTxt,$aAngle);
	return $box[1]-$box[7]+1;
    }

    function GetBBoxWidth($aTxt,$aAngle=0) {
	$box = $this->GetBBoxTTF($aTxt,$aAngle);
	return $box[2]-$box[0]+1;	
    }

    function _StrokeTTF($x,$y,$txt,$dir=0,$paragraph_align="left",&$aBoundingBox,$debug=false) {

	// Setupo default inter line margin for paragraphs to
	// 25% of the font height.
	$ConstLineSpacing = 0.25 ;

	// Remember the anchor point before adjustment
	if( $debug ) {
	    $ox=$x;
	    $oy=$y;
	}

	if( !ereg("\n",$txt) || ($dir>0 && ereg("\n",$txt)) ) {
	    // Format a single line

	    $txt = $this->AddTxtCR($txt);

	    $bbox=$this->GetBBoxTTF($txt,$dir);
	    
	    // Align x,y ot lower left corner of bbox
	    $x -= $bbox[0];
	    $y -= $bbox[1];

	    // Note to self: "topanchor" is deprecated after we changed the
	    // bopunding box stuff. 
	    if( $this->text_halign=="right" || $this->text_halign=="topanchor" ) 
		$x -= $bbox[2]-$bbox[0];
	    elseif( $this->text_halign=="center" ) $x -= ($bbox[2]-$bbox[0])/2; 
	    
	    if( $this->text_valign=="top" ) $y += abs($bbox[5])+$bbox[1];
	    elseif( $this->text_valign=="center" ) $y -= ($bbox[5]-$bbox[1])/2; 

	    ImageTTFText ($this->img, $this->font_size, $dir, $x, $y, 
			  $this->current_color,$this->font_file,$txt); 

	    // Calculate and return the co-ordinates for the bounding box
	    $box=@ImageTTFBBox($this->font_size,$dir,$this->font_file,$txt);
	    $p1 = array();


	    for($i=0; $i < 4; ++$i) {
		$p1[] = round($box[$i*2]+$x);
		$p1[] = round($box[$i*2+1]+$y);
	    }
	    $aBoundingBox = $p1;

	    // Debugging code to highlight the bonding box and bounding rectangle
	    // For text at 0 degrees the bounding box and bounding rectangle are the
	    // same
            if( $debug ) {
		// Draw the bounding rectangle and the bounding box
		$box=@ImageTTFBBox($this->font_size,$dir,$this->font_file,$txt);
		$p = array();
		$p1 = array();
		for($i=0; $i < 4; ++$i) {
		    $p[] = $bbox[$i*2]+$x;
		    $p[] = $bbox[$i*2+1]+$y;
		    $p1[] = $box[$i*2]+$x;
		    $p1[] = $box[$i*2+1]+$y;
		}

		// Draw bounding box
		$this->PushColor('green');
		$this->Polygon($p1,true);
		$this->PopColor();
		
		// Draw bounding rectangle
		$this->PushColor('darkgreen');
		$this->Polygon($p,true);
		$this->PopColor();
		
		// Draw a cross at the anchor point
		$this->PushColor('red');
		$this->Line($ox-15,$oy,$ox+15,$oy);
		$this->Line($ox,$oy-15,$ox,$oy+15);
		$this->PopColor();
            }
	}
	else {
	    // Format a text paragraph
	    $fh=$this->GetFontHeight();

	    // Line margin is 25% of font height
	    $linemargin=round($fh*$ConstLineSpacing);
	    $fh += $linemargin;
	    $w=$this->GetTextWidth($txt);

	    $y -= $linemargin/2;
	    $tmp = split("\n",$txt);
	    $nl = count($tmp);
	    $h = $nl * $fh;

	    if( $this->text_halign=="right") 				
		$x -= $dir==0 ? $w : $h;
	    elseif( $this->text_halign=="center" ) {
		$x -= $dir==0 ? $w/2 : $h/2;
	    }
	    
	    if( $this->text_valign=="top" )
		$y +=	$dir==0 ? $h : $w;
	    elseif( $this->text_valign=="center" ) 				
		$y +=	$dir==0 ? $h/2 : $w/2;

	    // Here comes a tricky bit. 
	    // Since we have to give the position for the string at the
	    // baseline this means thaht text will move slightly up
	    // and down depending on any of it's character descend below
	    // the baseline, for example a 'g'. To adjust the Y-position
	    // we therefore adjust the text with the baseline Y-offset
	    // as used for the current font and size. This will keep the
	    // baseline at a fixed positoned disregarding the actual 
	    // characters in the string. 
	    $standardbox = $this->GetTTFBBox('Gg',$dir);
	    $yadj = $standardbox[1];
	    $xadj = $standardbox[0];
	    $aBoundingBox = array();
	    for($i=0; $i < $nl; ++$i) {
		$wl = $this->GetTextWidth($tmp[$i]);
		$bbox = $this->GetTTFBBox($tmp[$i],$dir);
		if( $paragraph_align=="left" ) {
		    $xl = $x; 
		}
		elseif( $paragraph_align=="right" ) {
		    $xl = $x + ($w-$wl);
		}
		else {
		    // Center
		    $xl = $x + $w/2 - $wl/2 ;
		}

		$xl -= $bbox[0];
		$yl = $y - $yadj; 
		$xl = $xl - $xadj; 
		ImageTTFText ($this->img, $this->font_size, $dir, 
			      $xl, $yl-($h-$fh)+$fh*$i,
			      $this->current_color,$this->font_file,$tmp[$i]); 

		if( $debug  ) {
		    // Draw the bounding rectangle around each line
		    $box=@ImageTTFBBox($this->font_size,$dir,$this->font_file,$tmp[$i]);
		    $p = array();
		    for($j=0; $j < 4; ++$j) {
			$p[] = $bbox[$j*2]+$xl;
			$p[] = $bbox[$j*2+1]+$yl-($h-$fh)+$fh*$i;
		    }
		    
		    // Draw bounding rectangle
		    $this->PushColor('darkgreen');
		    $this->Polygon($p,true);
		    $this->PopColor();
		}
	    }

	    // Get the bounding box
	    $bbox = $this->GetBBoxTTF($txt,$dir);
	    for($j=0; $j < 4; ++$j) {
		$bbox[$j*2]+= round($x);
		$bbox[$j*2+1]+= round($y - ($h-$fh) - $yadj);
	    }
	    $aBoundingBox = $bbox;

	    if( $debug ) {	
		// Draw a cross at the anchor point
		$this->PushColor('red');
		$this->Line($ox-25,$oy,$ox+25,$oy);
		$this->Line($ox,$oy-25,$ox,$oy+25);
		$this->PopColor();
	    }

	}
    }
	
    function StrokeText($x,$y,$txt,$dir=0,$paragraph_align="left",$debug=false) {

	$x = round($x);
	$y = round($y);

	// Do special language encoding
	$txt = $this->langconv->Convert($txt,$this->font_family);

	if( !is_numeric($dir) )
	    JpGraphError::RaiseL(25094);//(" Direction for text most be given as an angle between 0 and 90.");
			
	if( $this->font_family >= FF_FONT0 && $this->font_family <= FF_FONT2+1) {	
	    $this->_StrokeBuiltinFont($x,$y,$txt,$dir,$paragraph_align,$boundingbox,$debug);
	}
	elseif($this->font_family >= _FF_FIRST && $this->font_family <= _FF_LAST)  {
	    $this->_StrokeTTF($x,$y,$txt,$dir,$paragraph_align,$boundingbox,$debug);
	}
	else
	    JpGraphError::RaiseL(25095);//(" Unknown font font family specification. ");
	return $boundingbox;
    }
	
    function SetMargin($lm,$rm,$tm,$bm) {
	$this->left_margin=$lm;
	$this->right_margin=$rm;
	$this->top_margin=$tm;
	$this->bottom_margin=$bm;
	$this->plotwidth=$this->width - $this->left_margin-$this->right_margin ; 
	$this->plotheight=$this->height - $this->top_margin-$this->bottom_margin ;
	if( $this->width  > 0 && $this->height > 0 ) {
	    if( $this->plotwidth < 0  || $this->plotheight < 0 )
		JpGraphError::raise("Too small plot area. ($lm,$rm,$tm,$bm : $this->plotwidth x $this->plotheight). With the given image size and margins there is to little space left for the plot. Increase the plot size or reduce the margins.");
	}
    }

    function SetTransparent($color) {
	imagecolortransparent ($this->img,$this->rgb->allocate($color));
    }
	
    function SetColor($color,$aAlpha=0) {
	$this->current_color_name = $color;
	$this->current_color=$this->rgb->allocate($color,$aAlpha);
	if( $this->current_color == -1 ) {
	    $tc=imagecolorstotal($this->img);
	    JpGraphError::RaiseL(25096);
//("Can't allocate any more colors. Image has already allocated maximum of <b>$tc colors</b>. This might happen if you have anti-aliasing turned on together with a background image or perhaps gradient fill since this requires many, many colors. Try to turn off anti-aliasing. If there is still a problem try downgrading the quality of the background image to use a smaller pallete to leave some entries for your graphs. You should try to limit the number of colors in your background image to 64. If there is still problem set the constant DEFINE(\"USE_APPROX_COLORS\",true); in jpgraph.php This will use approximative colors when the palette is full. Unfortunately there is not much JpGraph can do about this since the palette size is a limitation of current graphic format and what the underlying GD library suppports."); 
	}
	return $this->current_color;
    }
	
    function PushColor($color) {
	if( $color != "" ) {
	    $this->colorstack[$this->colorstackidx]=$this->current_color_name;
	    $this->colorstack[$this->colorstackidx+1]=$this->current_color;
	    $this->colorstackidx+=2;
	    $this->SetColor($color);
	}
	else {
	    JpGraphError::RaiseL(25097);//("Color specified as empty string in PushColor().");
	}
    }
	
    function PopColor() {
	if($this->colorstackidx<1)
	    JpGraphError::RaiseL(25098);//(" Negative Color stack index. Unmatched call to PopColor()");
	$this->current_color=$this->colorstack[--$this->colorstackidx];
	$this->current_color_name=$this->colorstack[--$this->colorstackidx];
    }
	
	
    // Why this duplication? Because this way we can call this method
    // for any image and not only the current objsct
    function AdjSat($sat) {	
	if( $GLOBALS['gd2'] && USE_TRUECOLOR )
	    return;
	$this->_AdjSat($this->img,$sat);	
    }	
	
    function _AdjSat($img,$sat) {
	$nbr = imagecolorstotal ($img);
	for( $i=0; $i<$nbr; ++$i ) {
	    $colarr = imagecolorsforindex ($img,$i);
	    $rgb[0]=$colarr["red"];
	    $rgb[1]=$colarr["green"];
	    $rgb[2]=$colarr["blue"];
	    $rgb = $this->AdjRGBSat($rgb,$sat);
	    imagecolorset ($img, $i, $rgb[0], $rgb[1], $rgb[2]);
	}
    }
	
    function AdjBrightContrast($bright,$contr=0) {
	if( $GLOBALS['gd2'] && USE_TRUECOLOR )
	    return;
	$this->_AdjBrightContrast($this->img,$bright,$contr);
    }

    function _AdjBrightContrast($img,$bright,$contr=0) {
	if( $bright < -1 || $bright > 1 || $contr < -1 || $contr > 1 )
	    JpGraphError::RaiseL(25099);//(" Parameters for brightness and Contrast out of range [-1,1]");		
	$nbr = imagecolorstotal ($img);
	for( $i=0; $i<$nbr; ++$i ) {
	    $colarr = imagecolorsforindex ($img,$i);
	    $r = $this->AdjRGBBrightContrast($colarr["red"],$bright,$contr);
	    $g = $this->AdjRGBBrightContrast($colarr["green"],$bright,$contr);
	    $b = $this->AdjRGBBrightContrast($colarr["blue"],$bright,$contr);		
	    imagecolorset ($img, $i, $r, $g, $b);
	}
    }
	
    // Private helper function for adj sat
    // Adjust saturation for RGB array $u. $sat is a value between -1 and 1
    // Note: Due to GD inability to handle true color the RGB values are only between
    // 8 bit. This makes saturation quite sensitive for small increases in parameter sat.
    // 
    // Tip: To get a grayscale picture set sat=-100, values <-100 changes the colors
    // to it's complement.
    // 
    // Implementation note: The saturation is implemented directly in the RGB space
    // by adjusting the perpendicular distance between the RGB point and the "grey"
    // line (1,1,1). Setting $sat>0 moves the point away from the line along the perp.
    // distance and a negative value moves the point closer to the line.
    // The values are truncated when the color point hits the bounding box along the
    // RGB axis.
    // DISCLAIMER: I'm not 100% sure this is he correct way to implement a color 
    // saturation function in RGB space. However, it looks ok and has the expected effect.
    function AdjRGBSat($rgb,$sat) {
	// TODO: Should be moved to the RGB class
	// Grey vector
	$v=array(1,1,1);

	// Dot product
	$dot = $rgb[0]*$v[0]+$rgb[1]*$v[1]+$rgb[2]*$v[2];

	// Normalize dot product
	$normdot = $dot/3;	// dot/|v|^2

	// Direction vector between $u and its projection onto $v
	for($i=0; $i<3; ++$i)
	    $r[$i] = $rgb[$i] - $normdot*$v[$i];

	// Adjustment factor so that sat==1 sets the highest RGB value to 255
	if( $sat > 0 ) {
	    $m=0;
	    for( $i=0; $i<3; ++$i) {
		if( sign($r[$i]) == 1 && $r[$i]>0)
		    $m=max($m,(255-$rgb[$i])/$r[$i]);
	    }
	    $tadj=$m;
	}
	else
	    $tadj=1;
		
	$tadj = $tadj*$sat;	
	for($i=0; $i<3; ++$i) {
	    $un[$i] = round($rgb[$i] + $tadj*$r[$i]);		
	    if( $un[$i]<0 ) $un[$i]=0;		// Truncate color when they reach 0
	    if( $un[$i]>255 ) $un[$i]=255;// Avoid potential rounding error
	}		
	return $un;	
    }	

    // Private helper function for AdjBrightContrast
    function AdjRGBBrightContrast($rgb,$bright,$contr) {
	// TODO: Should be moved to the RGB class
	// First handle contrast, i.e change the dynamic range around grey
	if( $contr <= 0 ) {
	    // Decrease contrast
	    $adj = abs($rgb-128) * (-$contr);
	    if( $rgb < 128 ) $rgb += $adj;
	    else $rgb -= $adj;
	}
	else { // $contr > 0
	    // Increase contrast
	    if( $rgb < 128 ) $rgb = $rgb - ($rgb * $contr);
	    else $rgb = $rgb + ((255-$rgb) * $contr);
	}
	
	// Add (or remove) various amount of white
	$rgb += $bright*255;	
	$rgb=min($rgb,255);
	$rgb=max($rgb,0);
	return $rgb;	
    }
	
    function SetLineWeight($weight) {
	$this->line_weight = $weight;
    }
	
    function SetStartPoint($x,$y) {
	$this->lastx=round($x);
	$this->lasty=round($y);
    }
	
    function Arc($cx,$cy,$w,$h,$s,$e) {
	// GD Arc doesn't like negative angles
	while( $s < 0) $s += 360;
	while( $e < 0) $e += 360;
    	
	imagearc($this->img,round($cx),round($cy),round($w),round($h),
		 $s,$e,$this->current_color);
    }
    
    function FilledArc($xc,$yc,$w,$h,$s,$e,$style="") {

	if( $GLOBALS['gd2'] ) {
	    while( $s < 0 ) $s += 360;
	    while( $e < 0 ) $e += 360;
	    if( $style=="" ) 
		$style=IMG_ARC_PIE;
	    imagefilledarc($this->img,round($xc),round($yc),round($w),round($h),
			   round($s),round($e),$this->current_color,$style);
	    return;
	}


	// In GD 1.x we have to do it ourself interesting enough there is surprisingly
	// little difference in time between doing it PHP and using the optimised GD 
	// library (roughly ~20%) I had expected it to be at least 100% slower doing it
	// manually with a polygon approximation in PHP.....
	$fillcolor = $this->current_color_name;

	$w /= 2; // We use radius in our calculations instead
	$h /= 2;

	// Setup the angles so we have the same conventions as the builtin
	// FilledArc() which is a little bit strange if you ask me....

	$s = 360-$s;
	$e = 360-$e;

	if( $e > $s ) {
	    $e = $e - 360;
	    $da = $s - $e; 
	}
	$da = $s-$e;

	// We use radians
	$s *= M_PI/180;
	$e *= M_PI/180;
	$da *= M_PI/180;

	// Calculate a polygon approximation
	$p[0] = $xc;
	$p[1] = $yc;

	// Heuristic on how many polygons we need to make the
	// arc look good
	$numsteps = round(8 * abs($da) * ($w+$h)*($w+$h)/1500);

	if( $numsteps == 0 ) return;
	if( $numsteps < 7 ) $numsteps=7;
	$delta = abs($da)/$numsteps;
	
	$pa=array();
	$a = $s;
	for($i=1; $i<=$numsteps; ++$i ) {
	    $p[2*$i] = round($xc + $w*cos($a));
	    $p[2*$i+1] = round($yc - $h*sin($a));
	    //$a = $s + $i*$delta; 
	    $a -= $delta; 
	    $pa[2*($i-1)] = $p[2*$i];
	    $pa[2*($i-1)+1] = $p[2*$i+1];
	}

	// Get the last point at the exact ending angle to avoid
	// any rounding errors.
	$p[2*$i] = round($xc + $w*cos($e));
	$p[2*$i+1] = round($yc - $h*sin($e));
	$pa[2*($i-1)] = $p[2*$i];
	$pa[2*($i-1)+1] = $p[2*$i+1];
	$i++;

	$p[2*$i] = $xc;
    	$p[2*$i+1] = $yc;
	if( $fillcolor != "" ) {
	    $this->PushColor($fillcolor);
	    imagefilledpolygon($this->img,$p,count($p)/2,$this->current_color);
	    $this->PopColor();
	}
    }

    function FilledCakeSlice($cx,$cy,$w,$h,$s,$e) {
	$this->CakeSlice($cx,$cy,$w,$h,$s,$e,$this->current_color_name);
    }

    function CakeSlice($xc,$yc,$w,$h,$s,$e,$fillcolor="",$arccolor="") {
	$s = round($s); $e = round($e);
	$w = round($w); $h = round($h);
	$xc = round($xc); $yc = round($yc);
	$this->PushColor($fillcolor);
	$this->FilledArc($xc,$yc,2*$w,2*$h,$s,$e);
	$this->PopColor();
	if( $arccolor != "" ) {
	    $this->PushColor($arccolor);
	    // We add 2 pixels to make the Arc() better aligned with the filled arc. 
	    if( $GLOBALS['gd2'] ) {
		imagefilledarc($this->img,$xc,$yc,2*$w,2*$h,$s,$e,$this->current_color,IMG_ARC_NOFILL | IMG_ARC_EDGED ) ;
	    }
	    else {
		$this->Arc($xc,$yc,2*$w+2,2*$h+2,$s,$e);
		$xx = $w * cos(2*M_PI - $s*M_PI/180) + $xc;
		$yy = $yc - $h * sin(2*M_PI - $s*M_PI/180);
		$this->Line($xc,$yc,$xx,$yy);
		$xx = $w * cos(2*M_PI - $e*M_PI/180) + $xc;
		$yy = $yc - $h * sin(2*M_PI - $e*M_PI/180);
		$this->Line($xc,$yc,$xx,$yy);
	    }
	    $this->PopColor();
	}
    }

    function Ellipse($xc,$yc,$w,$h) {
	$this->Arc($xc,$yc,$w,$h,0,360);
    }
	
    // Breseham circle gives visually better result then using GD
    // built in arc(). It takes some more time but gives better
    // accuracy.
    function BresenhamCircle($xc,$yc,$r) {
	$d = 3-2*$r;
	$x = 0;
	$y = $r;
	while($x<=$y) {
	    $this->Point($xc+$x,$yc+$y);			
	    $this->Point($xc+$x,$yc-$y);
	    $this->Point($xc-$x,$yc+$y);
	    $this->Point($xc-$x,$yc-$y);
			
	    $this->Point($xc+$y,$yc+$x);
	    $this->Point($xc+$y,$yc-$x);
	    $this->Point($xc-$y,$yc+$x);
	    $this->Point($xc-$y,$yc-$x);
			
	    if( $d<0 ) $d += 4*$x+6;
	    else {
		$d += 4*($x-$y)+10;		
		--$y;
	    }
	    ++$x;
	}
    }
			
    function Circle($xc,$yc,$r) {
	if( USE_BRESENHAM )
	    $this->BresenhamCircle($xc,$yc,$r);
	else {

	    /*
            // Some experimental code snippet to see if we can get a decent 
	    // result doing a trig-circle
	    // Create an approximated circle with 0.05 rad resolution
	    $end = 2*M_PI;
	    $l = $r/10;
	    if( $l < 3 ) $l=3;
	    $step_size = 2*M_PI/(2*$r*M_PI/$l);
	    $pts = array();
	    $pts[] = $r + $xc;
	    $pts[] = $yc;
	    for( $a=$step_size; $a <= $end; $a += $step_size ) {
		$pts[] = round($xc + $r*cos($a));
		$pts[] = round($yc - $r*sin($a));
	    }
	    imagepolygon($this->img,$pts,count($pts)/2,$this->current_color);
	    */

	    $this->Arc($xc,$yc,$r*2,$r*2,0,360);		

	    // For some reason imageellipse() isn't in GD 2.0.1, PHP 4.1.1
	    //imageellipse($this->img,$xc,$yc,$r,$r,$this->current_color);
	}
    }
	
    function FilledCircle($xc,$yc,$r) {
	if( $GLOBALS['gd2'] ) {
	    imagefilledellipse($this->img,round($xc),round($yc),
	    		       2*$r,2*$r,$this->current_color);
	}
	else {
	    for( $i=1; $i < 2*$r; $i += 2 ) {
		// To avoid moire patterns we have to draw some
		// 1 extra "skewed" filled circles
		$this->Arc($xc,$yc,$i,$i,0,360);
		$this->Arc($xc,$yc,$i+1,$i,0,360);
		$this->Arc($xc,$yc,$i+1,$i+1,0,360);
	    }
	}	
    }
	
    // Linear Color InterPolation
    function lip($f,$t,$p) {
	$p = round($p,1);
	$r = $f[0] + ($t[0]-$f[0])*$p;
	$g = $f[1] + ($t[1]-$f[1])*$p;
	$b = $f[2] + ($t[2]-$f[2])*$p;
	return array($r,$g,$b);
    }

    // Anti-aliased line. 
    // Note that this is roughly 8 times slower then a normal line!
    function WuLine($x1,$y1,$x2,$y2) {
	// Get foreground line color
	$lc = imagecolorsforindex($this->img,$this->current_color);
	$lc = array($lc["red"],$lc["green"],$lc["blue"]);

	$dx = $x2-$x1;
	$dy = $y2-$y1;
	
	if( abs($dx) > abs($dy) ) {
	    if( $dx<0 ) {
		$dx = -$dx;$dy = -$dy;
		$tmp=$x2;$x2=$x1;$x1=$tmp;
		$tmp=$y2;$y2=$y1;$y1=$tmp;
	    }
	    $x=$x1<<16; $y=$y1<<16;
	    $yinc = ($dy*65535)/$dx;
	    while( ($x >> 16) < $x2 ) {
				
		$bc = @imagecolorsforindex($this->img,imagecolorat($this->img,$x>>16,$y>>16));
		if( $bc <= 0 ) {
		    JpGraphError::RaiseL(25100);//('Problem with color palette and your GD setup. Please disable anti-aliasing or use GD2 with true-color. If you have GD2 library installed please make sure that you have set the USE_GD2 constant to true and that truecolor is enabled.');
		}
		$bc=array($bc["red"],$bc["green"],$bc["blue"]);
				
		$this->SetColor($this->lip($lc,$bc,($y & 0xFFFF)/65535));
		imagesetpixel($this->img,$x>>16,$y>>16,$this->current_color);
		$this->SetColor($this->lip($lc,$bc,(~$y & 0xFFFF)/65535));
		imagesetpixel($this->img,$x>>16,($y>>16)+1,$this->current_color);
		$x += 65536; $y += $yinc;
	    }
	}
	else {
	    if( $dy<0 ) {
		$dx = -$dx;$dy = -$dy;
		$tmp=$x2;$x2=$x1;$x1=$tmp;
		$tmp=$y2;$y2=$y1;$y1=$tmp;
	    }
	    $x=$x1<<16; $y=$y1<<16;
	    $xinc = ($dx*65535)/$dy;	
	    while( ($y >> 16) < $y2 ) {
				
		$bc = @imagecolorsforindex($this->img,imagecolorat($this->img,$x>>16,$y>>16));
		if( $bc <= 0 ) {
		    JpGraphError::RaiseL(25100);//('Problem with color palette and your GD setup. Please disable anti-aliasing or use GD2 with true-color. If you have GD2 library installed please make sure that you have set the USE_GD2 constant to true and truecolor is enabled.');

		}

		$bc=array($bc["red"],$bc["green"],$bc["blue"]);				
				
		$this->SetColor($this->lip($lc,$bc,($x & 0xFFFF)/65535));
		imagesetpixel($this->img,$x>>16,$y>>16,$this->current_color);
		$this->SetColor($this->lip($lc,$bc,(~$x & 0xFFFF)/65535));
		imagesetpixel($this->img,($x>>16)+1,$y>>16,$this->current_color);
		$y += 65536; $x += $xinc;
	    }
	}
	$this->SetColor($lc);
	imagesetpixel($this->img,$x2,$y2,$this->current_color);		
	imagesetpixel($this->img,$x1,$y1,$this->current_color);			
    }

    // Set line style dashed, dotted etc
    function SetLineStyle($s) {
	if( is_numeric($s) ) {
	    if( $s<1 || $s>4 ) 
		JpGraphError::RaiseL(25101,$s);//(" Illegal numeric argument to SetLineStyle(): ($s)");
	}
	elseif( is_string($s) ) {
	    if( $s == "solid" ) $s=1;
	    elseif( $s == "dotted" ) $s=2;
	    elseif( $s == "dashed" ) $s=3;
	    elseif( $s == "longdashed" ) $s=4;
	    else JpGraphError::RaiseL(25102,$s);//(" Illegal string argument to SetLineStyle(): $s");
	}
	else JpGraphError::RaiseL(25103,$s);//(" Illegal argument to SetLineStyle $s");
	$this->line_style=$s;
    }
	
    // Same as Line but take the line_style into account
    function StyleLine($x1,$y1,$x2,$y2) {
	switch( $this->line_style ) {
	    case 1:// Solid
		$this->Line($x1,$y1,$x2,$y2);
		break;
	    case 2: // Dotted
		$this->DashedLine($x1,$y1,$x2,$y2,1,6);
		break;
	    case 3: // Dashed
		$this->DashedLine($x1,$y1,$x2,$y2,2,4);
		break;
	    case 4: // Longdashes
		$this->DashedLine($x1,$y1,$x2,$y2,8,6);
		break;
	    default:
		JpGraphError::RaiseL(25104,$this->line_style);//(" Unknown line style: $this->line_style ");
		break;
	}
    }

    function Line($x1,$y1,$x2,$y2) {

	$x1 = round($x1);
	$x2 = round($x2);
	$y1 = round($y1);
	$y2 = round($y2);

	if( $this->line_weight==0 ) return;
	if( $this->use_anti_aliasing ) {
	    $dx = $x2-$x1;
	    $dy = $y2-$y1;
	    // Vertical, Horizontal or 45 lines don't need anti-aliasing
	    if( $dx!=0 && $dy!=0 && $dx!=$dy ) {
		$this->WuLine($x1,$y1,$x2,$y2);
		return;
	    }
	}
	if( $this->line_weight==1 ) {
	    imageline($this->img,$x1,$y1,$x2,$y2,$this->current_color);
	}
	elseif( $x1==$x2 ) {		// Special case for vertical lines
	    imageline($this->img,$x1,$y1,$x2,$y2,$this->current_color);
	    $w1=floor($this->line_weight/2);
	    $w2=floor(($this->line_weight-1)/2);
	    for($i=1; $i<=$w1; ++$i) 
		imageline($this->img,$x1+$i,$y1,$x2+$i,$y2,$this->current_color);
	    for($i=1; $i<=$w2; ++$i) 
		imageline($this->img,$x1-$i,$y1,$x2-$i,$y2,$this->current_color);
	}
	elseif( $y1==$y2 ) {		// Special case for horizontal lines
	    imageline($this->img,$x1,$y1,$x2,$y2,$this->current_color);
	    $w1=floor($this->line_weight/2);
	    $w2=floor(($this->line_weight-1)/2);
	    for($i=1; $i<=$w1; ++$i) 
		imageline($this->img,$x1,$y1+$i,$x2,$y2+$i,$this->current_color);
	    for($i=1; $i<=$w2; ++$i) 
		imageline($this->img,$x1,$y1-$i,$x2,$y2-$i,$this->current_color);		
	}
	else {	// General case with a line at an angle
	    $a = atan2($y1-$y2,$x2-$x1);
	    // Now establish some offsets from the center. This gets a little
	    // bit involved since we are dealing with integer functions and we
	    // want the apperance to be as smooth as possible and never be thicker
	    // then the specified width.
			
	    // We do the trig stuff to make sure that the endpoints of the line
	    // are perpendicular to the line itself.
	    $dx=(sin($a)*$this->line_weight/2);
	    $dy=(cos($a)*$this->line_weight/2);

	    $pnts = array($x2+$dx,$y2+$dy,$x2-$dx,$y2-$dy,$x1-$dx,$y1-$dy,$x1+$dx,$y1+$dy);
	    imagefilledpolygon($this->img,$pnts,count($pnts)/2,$this->current_color);
	}		
	$this->lastx=$x2; $this->lasty=$y2;		
    }

    function Polygon($p,$closed=FALSE,$fast=FALSE) {
	if( $this->line_weight==0 ) return;
	$n=count($p);
	$oldx = $p[0];
	$oldy = $p[1];
	if( $fast ) {
	    for( $i=2; $i < $n; $i+=2 ) {
		imageline($this->img,$oldx,$oldy,$p[$i],$p[$i+1],$this->current_color);
		$oldx = $p[$i];
		$oldy = $p[$i+1];
	    }
	    if( $closed ) {
		imageline($this->img,$p[$n*2-2],$p[$n*2-1],$p[0],$p[1],$this->current_color);
	    }
	}
	else {
	    for( $i=2; $i < $n; $i+=2 ) {
		$this->StyleLine($oldx,$oldy,$p[$i],$p[$i+1]);
		$oldx = $p[$i];
		$oldy = $p[$i+1];
	    }
	}
	if( $closed )
	    $this->Line($oldx,$oldy,$p[0],$p[1]);
    }
	
    function FilledPolygon($pts) {
	$n=count($pts);
	if( $n == 0 ) {
	    JpGraphError::RaiseL(25105);//('NULL data specified for a filled polygon. Check that your data is not NULL.');
	}
	for($i=0; $i < $n; ++$i) 
	    $pts[$i] = round($pts[$i]);
	imagefilledpolygon($this->img,$pts,count($pts)/2,$this->current_color);
    }
	
    function Rectangle($xl,$yu,$xr,$yl) {
	$this->Polygon(array($xl,$yu,$xr,$yu,$xr,$yl,$xl,$yl,$xl,$yu));
    }
	
    function FilledRectangle($xl,$yu,$xr,$yl) {
	$this->FilledPolygon(array($xl,$yu,$xr,$yu,$xr,$yl,$xl,$yl));
    }

    function FilledRectangle2($xl,$yu,$xr,$yl,$color1,$color2,$style=1) {
	// Fill a rectangle with lines of two colors
	if( $style===1 ) {
	    // Horizontal stripe
	    if( $yl < $yu ) {
		$t = $yl; $yl=$yu; $yu=$t;
	    }
	    for( $y=$yu; $y <= $yl; ++$y) {
		$this->SetColor($color1);
		$this->Line($xl,$y,$xr,$y);
		++$y;
		$this->SetColor($color2);
		$this->Line($xl,$y,$xr,$y);
	    }
	}
	else {
	    if( $xl < $xl ) {
		$t = $xl; $xl=$xr; $xr=$t;
	    }
	    for( $x=$xl; $x <= $xr; ++$x) {
		$this->SetColor($color1);
		$this->Line($x,$yu,$x,$yl);
		++$x;
		$this->SetColor($color2);
		$this->Line($x,$yu,$x,$yl);
	    }
	}
    }

    function ShadowRectangle($xl,$yu,$xr,$yl,$fcolor=false,$shadow_width=3,$shadow_color=array(102,102,102)) {
	// This is complicated by the fact that we must also handle the case where
        // the reactangle has no fill color
	$this->PushColor($shadow_color);
	$this->FilledRectangle($xr-$shadow_width,$yu+$shadow_width,$xr,$yl-$shadow_width-1);
	$this->FilledRectangle($xl+$shadow_width,$yl-$shadow_width,$xr,$yl);
	//$this->FilledRectangle($xl+$shadow_width,$yu+$shadow_width,$xr,$yl);
	$this->PopColor();
	if( $fcolor==false )
	    $this->Rectangle($xl,$yu,$xr-$shadow_width-1,$yl-$shadow_width-1);
	else {		
	    $this->PushColor($fcolor);
	    $this->FilledRectangle($xl,$yu,$xr-$shadow_width-1,$yl-$shadow_width-1);
	    $this->PopColor();
	    $this->Rectangle($xl,$yu,$xr-$shadow_width-1,$yl-$shadow_width-1);
	}
    }

    function FilledRoundedRectangle($xt,$yt,$xr,$yl,$r=5) {
	if( $r==0 ) {
	    $this->FilledRectangle($xt,$yt,$xr,$yl);
	    return;
	}

	// To avoid overlapping fillings (which will look strange
	// when alphablending is enabled) we have no choice but 
	// to fill the five distinct areas one by one.
	
	// Center square
	$this->FilledRectangle($xt+$r,$yt+$r,$xr-$r,$yl-$r);
	// Top band
	$this->FilledRectangle($xt+$r,$yt,$xr-$r,$yt+$r-1);
	// Bottom band
	$this->FilledRectangle($xt+$r,$yl-$r+1,$xr-$r,$yl);
	// Left band
	$this->FilledRectangle($xt,$yt+$r+1,$xt+$r-1,$yl-$r);
	// Right band
	$this->FilledRectangle($xr-$r+1,$yt+$r,$xr,$yl-$r);

	// Topleft & Topright arc
	$this->FilledArc($xt+$r,$yt+$r,$r*2,$r*2,180,270);
	$this->FilledArc($xr-$r,$yt+$r,$r*2,$r*2,270,360);

	// Bottomleft & Bottom right arc
	$this->FilledArc($xt+$r,$yl-$r,$r*2,$r*2,90,180);
	$this->FilledArc($xr-$r,$yl-$r,$r*2,$r*2,0,90);

    }

    function RoundedRectangle($xt,$yt,$xr,$yl,$r=5) {    

	if( $r==0 ) {
	    $this->Rectangle($xt,$yt,$xr,$yl);
	    return;
	}

	// Top & Bottom line
	$this->Line($xt+$r,$yt,$xr-$r,$yt);
	$this->Line($xt+$r,$yl,$xr-$r,$yl);

	// Left & Right line
	$this->Line($xt,$yt+$r,$xt,$yl-$r);
	$this->Line($xr,$yt+$r,$xr,$yl-$r);

	// Topleft & Topright arc
	$this->Arc($xt+$r,$yt+$r,$r*2,$r*2,180,270);
	$this->Arc($xr-$r,$yt+$r,$r*2,$r*2,270,360);

	// Bottomleft & Bottomright arc
	$this->Arc($xt+$r,$yl-$r,$r*2,$r*2,90,180);
	$this->Arc($xr-$r,$yl-$r,$r*2,$r*2,0,90);
    }

    function FilledBevel($x1,$y1,$x2,$y2,$depth=2,$color1='white@0.4',$color2='darkgray@0.4') {
	$this->FilledRectangle($x1,$y1,$x2,$y2);
	$this->Bevel($x1,$y1,$x2,$y2,$depth,$color1,$color2);
    }

    function Bevel($x1,$y1,$x2,$y2,$depth=2,$color1='white@0.4',$color2='black@0.5') {
	$this->PushColor($color1);
	for( $i=0; $i < $depth; ++$i ) {
	    $this->Line($x1+$i,$y1+$i,$x1+$i,$y2-$i);
	    $this->Line($x1+$i,$y1+$i,$x2-$i,$y1+$i);
	}
	$this->PopColor();
	
	$this->PushColor($color2);
	for( $i=0; $i < $depth; ++$i ) {
	    $this->Line($x1+$i,$y2-$i,$x2-$i,$y2-$i);
	    $this->Line($x2-$i,$y1+$i,$x2-$i,$y2-$i-1);
	}
	$this->PopColor();
    }

    function StyleLineTo($x,$y) {
	$this->StyleLine($this->lastx,$this->lasty,$x,$y);
	$this->lastx=$x;
	$this->lasty=$y;
    }
	
    function LineTo($x,$y) {
	$this->Line($this->lastx,$this->lasty,$x,$y);
	$this->lastx=$x;
	$this->lasty=$y;
    }
	
    function Point($x,$y) {
	imagesetpixel($this->img,round($x),round($y),$this->current_color);
    }
	
    function Fill($x,$y) {
	imagefill($this->img,round($x),round($y),$this->current_color);
    }

    function FillToBorder($x,$y,$aBordColor) {
	$bc = $this->rgb->allocate($aBordColor);
	if( $bc == -1 ) {
	    JpGraphError::RaiseL(25106);//('Image::FillToBorder : Can not allocate more colors');
	}
	imagefilltoborder($this->img,round($x),round($y),$bc,$this->current_color);
    }
	
    function DashedLine($x1,$y1,$x2,$y2,$dash_length=1,$dash_space=4) {

	$x1 = round($x1);
	$x2 = round($x2);
	$y1 = round($y1);
	$y2 = round($y2);

	// Code based on, but not identical to, work by Ariel Garza and James Pine
	$line_length = ceil (sqrt(pow(($x2 - $x1),2) + pow(($y2 - $y1),2)) );
	$dx = ($line_length) ? ($x2 - $x1) / $line_length : 0;
	$dy = ($line_length) ? ($y2 - $y1) / $line_length : 0;
	$lastx = $x1; $lasty = $y1;
	$xmax = max($x1,$x2);
	$xmin = min($x1,$x2);
	$ymax = max($y1,$y2);
	$ymin = min($y1,$y2);
	for ($i = 0; $i < $line_length; $i += ($dash_length + $dash_space)) {
	    $x = ($dash_length * $dx) + $lastx;
	    $y = ($dash_length * $dy) + $lasty;
			
	    // The last section might overshoot so we must take a computational hit
	    // and check this.
	    if( $x>$xmax ) $x=$xmax;
	    if( $y>$ymax ) $y=$ymax;
			
	    if( $x<$xmin ) $x=$xmin;
	    if( $y<$ymin ) $y=$ymin;

	    $this->Line($lastx,$lasty,$x,$y);
	    $lastx = $x + ($dash_space * $dx);
	    $lasty = $y + ($dash_space * $dy);
	} 
    } 

    function SetExpired($aFlg=true) {
	$this->expired = $aFlg;
    }
	
    // Generate image header
    function Headers() {
	
	// In case we are running from the command line with the client version of
	// PHP we can't send any headers.
	$sapi = php_sapi_name();
	if( $sapi == 'cli' )
	    return;
	
	if( headers_sent($file,$lineno) ) {
	    $file=basename($file);
	    $t = new ErrMsgText();
	    $msg = $t->Get(10,$file,$lineno);
	    die($msg);
	}	
	
	if ($this->expired) {
	    header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
	    header("Last-Modified: " . gmdate("D, d M Y H:i:s") . "GMT");
	    header("Cache-Control: no-cache, must-revalidate");
	    header("Pragma: no-cache");
	}
	header("Content-type: image/$this->img_format");
    }

    // Adjust image quality for formats that allow this
    function SetQuality($q) {
	$this->quality = $q;
    }
	
    // Stream image to browser or to file
    function Stream($aFile="") {
	$func="image".$this->img_format;
	if( $this->img_format=="jpeg" && $this->quality != null ) {
	    $res = @$func($this->img,$aFile,$this->quality);
	}
	else {
	    if( $aFile != "" ) {
		$res = @$func($this->img,$aFile);
		if( !$res )
		    JpGraphError::RaiseL(25107,$aFile);//("Can't write to file '$aFile'. Check that the process running PHP has enough permission.");
	    }
	    else {
		$res = @$func($this->img);
		if( !$res )
		    JpGraphError::RaiseL(25108);//("Can't stream image. This is most likely due to a faulty PHP/GD setup. Try to recompile PHP and use the built-in GD library that comes with PHP.");
		
	    }
	}
    }
		
    // Clear resource tide up by image
    function Destroy() {
	imagedestroy($this->img);
    }
	
    // Specify image format. Note depending on your installation
    // of PHP not all formats may be supported.
    function SetImgFormat($aFormat,$aQuality=75) {		
	$this->quality = $aQuality;
	$aFormat = strtolower($aFormat);
	$tst = true;
	$supported = imagetypes();
	if( $aFormat=="auto" ) {
	    if( $supported & IMG_PNG )
		$this->img_format="png";
	    elseif( $supported & IMG_JPG )
		$this->img_format="jpeg";
	    elseif( $supported & IMG_GIF )
		$this->img_format="gif";
	    else
		JpGraphError::RaiseL(25109);//("Your PHP (and GD-lib) installation does not appear to support any known graphic formats. You need to first make sure GD is compiled as a module to PHP. If you also want to use JPEG images you must get the JPEG library. Please see the PHP docs for details.");
				
	    return true;
	}
	else {
	    if( $aFormat=="jpeg" || $aFormat=="png" || $aFormat=="gif" ) {
		if( $aFormat=="jpeg" && !($supported & IMG_JPG) )
		    $tst=false;
		elseif( $aFormat=="png" && !($supported & IMG_PNG) ) 
		    $tst=false;
		elseif( $aFormat=="gif" && !($supported & IMG_GIF) ) 	
		    $tst=false;
		else {
		    $this->img_format=$aFormat;
		    return true;
		}
	    }
	    else 
		$tst=false;
	    if( !$tst )
		JpGraphError::RaiseL(25110,$aFormat);//(" Your PHP installation does not support the chosen graphic format: $aFormat");
	}
    }	
} // CLASS

//===================================================
// CLASS RotImage
// Description: Exactly as Image but draws the image at
// a specified angle around a specified rotation point.
//===================================================
class RotImage extends Image {
    var $m=array();
    var $a=0;
    var $dx=0,$dy=0,$transx=0,$transy=0; 
	
    function RotImage($aWidth,$aHeight,$a=0,$aFormat=DEFAULT_GFORMAT) {
	$this->Image($aWidth,$aHeight,$aFormat);
	$this->dx=$this->left_margin+$this->plotwidth/2;
	$this->dy=$this->top_margin+$this->plotheight/2;
	$this->SetAngle($a);	
    }
	
    function SetCenter($dx,$dy) {
	$old_dx = $this->dx;
	$old_dy = $this->dy;
	$this->dx=$dx;
	$this->dy=$dy;
	$this->SetAngle($this->a);
	return array($old_dx,$old_dy);
    }
	
    function SetTranslation($dx,$dy) {
	$old = array($this->transx,$this->transy);
	$this->transx = $dx;
	$this->transy = $dy;
	return $old;
    }

    function UpdateRotMatrice()  {
	$a = $this->a;
	$a *= M_PI/180;
	$sa=sin($a); $ca=cos($a);		
	// Create the rotation matrix
	$this->m[0][0] = $ca;
	$this->m[0][1] = -$sa;
	$this->m[0][2] = $this->dx*(1-$ca) + $sa*$this->dy ;
	$this->m[1][0] = $sa;
	$this->m[1][1] = $ca;
	$this->m[1][2] = $this->dy*(1-$ca) - $sa*$this->dx ;
    }

    function SetAngle($a) {
	$tmp = $this->a;
	$this->a = $a;
	$this->UpdateRotMatrice();
	return $tmp;
    }

    function Circle($xc,$yc,$r) {
	// Circle get's rotated through the Arc() call
	// made in the parent class
	parent::Circle($xc,$yc,$r);
    }

    function FilledCircle($xc,$yc,$r) {
	// If we use GD1 then Image::FilledCircle will use a 
	// call to Arc so it will get rotated through the Arc
	// call.
	if( $GLOBALS['gd2'] ) {
	    list($xc,$yc) = $this->Rotate($xc,$yc);
	}
	parent::FilledCircle($xc,$yc,$r);
    }
	
    function Arc($xc,$yc,$w,$h,$s,$e) {
	list($xc,$yc) = $this->Rotate($xc,$yc);
	$s += $this->a;
	$e += $this->a;
	parent::Arc($xc,$yc,$w,$h,$s,$e);
    }

    function FilledArc($xc,$yc,$w,$h,$s,$e) {
	list($xc,$yc) = $this->Rotate($xc,$yc);
	$s += $this->a;
	$e += $this->a;
	parent::FilledArc($xc,$yc,$w,$h,$s,$e);
    }

    function SetMargin($lm,$rm,$tm,$bm) {
	parent::SetMargin($lm,$rm,$tm,$bm);
	$this->dx=$this->left_margin+$this->plotwidth/2;
	$this->dy=$this->top_margin+$this->plotheight/2;
	$this->UpdateRotMatrice();
    }
	
    function Rotate($x,$y) {
	// Optimization. Ignore rotation if Angle==0 || ANgle==360
	if( $this->a == 0 || $this->a == 360 ) {
	    return array($x + $this->transx, $y + $this->transy );
	}
	else {
	    $x1=round($this->m[0][0]*$x + $this->m[0][1]*$y,1) + $this->m[0][2] + $this->transx;
	    $y1=round($this->m[1][0]*$x + $this->m[1][1]*$y,1) + $this->m[1][2] + $this->transy;
	    return array($x1,$y1);
	}
    }

    function CopyMerge($fromImg,$toX,$toY,$fromX,$fromY,$toWidth,$toHeight,$fromWidth=-1,$fromHeight=-1,$aMix=100) {
	list($toX,$toY) = $this->Rotate($toX,$toY);
	parent::CopyMerge($fromImg,$toX,$toY,$fromX,$fromY,$toWidth,$toHeight,$fromWidth,$fromHeight,$aMix);

    }
	
    function ArrRotate($pnts) {
	$n = count($pnts)-1;
	for($i=0; $i < $n; $i+=2) {
	    list ($x,$y) = $this->Rotate($pnts[$i],$pnts[$i+1]);
	    $pnts[$i] = $x; $pnts[$i+1] = $y;
	}
	return $pnts;
    }
	
    function Line($x1,$y1,$x2,$y2) {
	list($x1,$y1) = $this->Rotate($x1,$y1);
	list($x2,$y2) = $this->Rotate($x2,$y2);
	parent::Line($x1,$y1,$x2,$y2);
    }

    function Rectangle($x1,$y1,$x2,$y2) {
	// Rectangle uses Line() so it will be rotated through that call
	parent::Rectangle($x1,$y1,$x2,$y2);
    }
	
    function FilledRectangle($x1,$y1,$x2,$y2) {
	if( $y1==$y2 || $x1==$x2 )
	    $this->Line($x1,$y1,$x2,$y2);
	else 
	    $this->FilledPolygon(array($x1,$y1,$x2,$y1,$x2,$y2,$x1,$y2));
    }
	
    function Polygon($pnts,$closed=FALSE,$fast=false) {
	//Polygon uses Line() so it will be rotated through that call
	parent::Polygon($pnts,$closed,$fast);
    }
	
    function FilledPolygon($pnts) {
	parent::FilledPolygon($this->ArrRotate($pnts));
    }
	
    function Point($x,$y) {
	list($xp,$yp) = $this->Rotate($x,$y);
	parent::Point($xp,$yp);
    }
	
    function StrokeText($x,$y,$txt,$dir=0,$paragraph_align="left",$debug=false) {
	list($xp,$yp) = $this->Rotate($x,$y);
	return parent::StrokeText($xp,$yp,$txt,$dir,$paragraph_align,$debug);
    }
}


?>