jpgraph.php

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<?php
//=======================================================================
// File:	JPGRAPH.PHP
// Description:	PHP Graph Plotting library. Base module.
// Created: 	2001-01-08
// Ver:		$Id: jpgraph.php 770 2006-09-24 20:19:11Z ljp $
//
// Copyright 2006 (c) Aditus Consulting. All rights reserved.
//========================================================================

require_once('jpg-config.inc.php');
require_once 'jpgraph_gradient.php';
require_once 'jpgraph_errhandler.inc.php';

// Version info
DEFINE('JPG_VERSION','2.1.3');

// Minimum required PHP version
DEFINE('MIN_PHPVERSION','5.1.0');

// Should the image be a truecolor image? 
// Note 1: Has only effect with GD 2.0.1 and above.
// Note 2: GD 2.0.1 + PHP 4.0.6 on Win32 crashes when trying to use 
// trucolor.
// Note 3: MUST be enabled to get background images working with GD2
DEFINE('USE_TRUECOLOR',true);

//------------------------------------------------------------------------
// Automatic settings of path for cache and font directory
// if they have not been previously specified
//------------------------------------------------------------------------
if(USE_CACHE) {
    if (!defined('CACHE_DIR')) {
	if ( strstr( PHP_OS, 'WIN') ) {
	    if( empty($_SERVER['TEMP']) ) {
		$t = new ErrMsgText();
		$msg = $t->Get(11,$file,$lineno);
		die($msg);
	    }
	    else {
		DEFINE('CACHE_DIR', $_SERVER['TEMP'] . '/');
	    }
	} else {
	    DEFINE('CACHE_DIR','/tmp/jpgraph_cache/');
	}
    }
}
elseif( !defined('CACHE_DIR') ) {
    DEFINE('CACHE_DIR', '');
}

if (!defined('TTF_DIR')) {
    if (strstr( PHP_OS, 'WIN') ) {
	$sroot = getenv('SystemRoot');
        if( empty($sroot) ) {
	    $t = new ErrMsgText();
	    $msg = $t->Get(12,$file,$lineno);
	    die($msg);
        }
	else {
	  DEFINE('TTF_DIR', $sroot.'/fonts/');
        }
    } else {
	DEFINE('TTF_DIR','/usr/X11R6/lib/X11/fonts/truetype/');
    }
}

//------------------------------------------------------------------
// Constants which are used as parameters for the method calls
//------------------------------------------------------------------

// TTF Font families
// Note: First font must be FF_COURIER and the last font family must
// be given to _LAST_FONT. This is used for error checking in the text
// handling routines.
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",18);
DEFINE("FF_VERAMONO",19);
DEFINE("FF_VERASERIF",20);

// 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 fonts
DEFINE("_FIRST_FONT",10);
DEFINE("_LAST_FONT",43);

// 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);

// Tick density
DEFINE("TICKD_DENSE",1);
DEFINE("TICKD_NORMAL",2);
DEFINE("TICKD_SPARSE",3);
DEFINE("TICKD_VERYSPARSE",4);

// Side for ticks and labels. 
DEFINE("SIDE_LEFT",-1);
DEFINE("SIDE_RIGHT",1);
DEFINE("SIDE_DOWN",-1);
DEFINE("SIDE_BOTTOM",-1);
DEFINE("SIDE_UP",1);
DEFINE("SIDE_TOP",1);

// Legend type stacked vertical or horizontal
DEFINE("LEGEND_VERT",0);
DEFINE("LEGEND_HOR",1);

// Mark types for plot marks
DEFINE("MARK_SQUARE",1);
DEFINE("MARK_UTRIANGLE",2);
DEFINE("MARK_DTRIANGLE",3);
DEFINE("MARK_DIAMOND",4);
DEFINE("MARK_CIRCLE",5);
DEFINE("MARK_FILLEDCIRCLE",6);
DEFINE("MARK_CROSS",7);
DEFINE("MARK_STAR",8);
DEFINE("MARK_X",9);
DEFINE("MARK_LEFTTRIANGLE",10);
DEFINE("MARK_RIGHTTRIANGLE",11);
DEFINE("MARK_FLASH",12);
DEFINE("MARK_IMG",13);
DEFINE("MARK_FLAG1",14);
DEFINE("MARK_FLAG2",15);
DEFINE("MARK_FLAG3",16);
DEFINE("MARK_FLAG4",17);

// Builtin images
DEFINE("MARK_IMG_PUSHPIN",50);
DEFINE("MARK_IMG_SPUSHPIN",50);
DEFINE("MARK_IMG_LPUSHPIN",51);
DEFINE("MARK_IMG_DIAMOND",52);
DEFINE("MARK_IMG_SQUARE",53);
DEFINE("MARK_IMG_STAR",54);
DEFINE("MARK_IMG_BALL",55);
DEFINE("MARK_IMG_SBALL",55);
DEFINE("MARK_IMG_MBALL",56);
DEFINE("MARK_IMG_LBALL",57);
DEFINE("MARK_IMG_BEVEL",58);

// Inline defines
DEFINE("INLINE_YES",1);
DEFINE("INLINE_NO",0);

// Format for background images
DEFINE("BGIMG_FILLPLOT",1);
DEFINE("BGIMG_FILLFRAME",2);
DEFINE("BGIMG_COPY",3);
DEFINE("BGIMG_CENTER",4);

// Depth of objects
DEFINE("DEPTH_BACK",0);
DEFINE("DEPTH_FRONT",1);

// Direction
DEFINE("VERTICAL",1);
DEFINE("HORIZONTAL",0);


// Axis styles for scientific style axis
DEFINE('AXSTYLE_SIMPLE',1);
DEFINE('AXSTYLE_BOXIN',2);
DEFINE('AXSTYLE_BOXOUT',3);
DEFINE('AXSTYLE_YBOXIN',4);
DEFINE('AXSTYLE_YBOXOUT',5);

// Style for title backgrounds
DEFINE('TITLEBKG_STYLE1',1);
DEFINE('TITLEBKG_STYLE2',2);
DEFINE('TITLEBKG_STYLE3',3);
DEFINE('TITLEBKG_FRAME_NONE',0);
DEFINE('TITLEBKG_FRAME_FULL',1);
DEFINE('TITLEBKG_FRAME_BOTTOM',2);
DEFINE('TITLEBKG_FRAME_BEVEL',3);
DEFINE('TITLEBKG_FILLSTYLE_HSTRIPED',1);
DEFINE('TITLEBKG_FILLSTYLE_VSTRIPED',2);
DEFINE('TITLEBKG_FILLSTYLE_SOLID',3);

// Style for background gradient fills
DEFINE('BGRAD_FRAME',1);
DEFINE('BGRAD_MARGIN',2);
DEFINE('BGRAD_PLOT',3);

// Width of tab titles
DEFINE('TABTITLE_WIDTHFIT',0);
DEFINE('TABTITLE_WIDTHFULL',-1);

// Defines for 3D skew directions
DEFINE('SKEW3D_UP',0);
DEFINE('SKEW3D_DOWN',1);
DEFINE('SKEW3D_LEFT',2);
DEFINE('SKEW3D_RIGHT',3);

// Line styles
DEFINE('LINESTYLE_DOTTED',1);
DEFINE('LINESTYLE_DASHED',2);
DEFINE('LINESTYLE_LONGDASH',3);
DEFINE('LINESTYLE_SOLID',4);

// For internal use only
DEFINE("_JPG_DEBUG",false);
DEFINE("_FORCE_IMGTOFILE",false);
DEFINE("_FORCE_IMGDIR",'/tmp/jpgimg/');

function CheckPHPVersion($aMinVersion)
{
    list($majorC, $minorC, $editC) = split('[/.-]', PHP_VERSION);
    list($majorR, $minorR, $editR) = split('[/.-]', $aMinVersion);
  
    if ($majorC > $majorR) return true;
    if ($majorC < $majorR) return false;
    // same major - check ninor
    if ($minorC > $minorR) return true;
    if ($minorC < $minorR) return false;
    // and same minor
    if ($editC  >= $editR)  return true;
    return true;
}

//
// Make sure PHP version is high enough
//
if( !CheckPHPVersion(MIN_PHPVERSION) ) {
    JpGraphError::RaiseL(13,PHP_VERSION,MIN_PHPVERSION);
}


//
// Make GD sanity check
//
if( !function_exists("imagetypes") || !function_exists('imagecreatefromstring') ) {
    JpGraphError::RaiseL(25001);
//("This PHP installation is not configured with the GD library. Please recompile PHP with GD support to run JpGraph. (Neither function imagetypes() nor imagecreatefromstring() does exist)");
}

//
// Setup PHP error handler
//
function _phpErrorHandler($errno,$errmsg,$filename, $linenum, $vars) {
    // Respect current error level
    if( $errno & error_reporting() ) {
	JpGraphError::RaiseL(25003,basename($filename),$linenum,$errmsg); 
    }
}

if( INSTALL_PHP_ERR_HANDLER ) {
    set_error_handler("_phpErrorHandler");
}

//
//Check if there were any warnings, perhaps some wrong includes by the
//user
//
if( isset($GLOBALS['php_errormsg']) && CATCH_PHPERRMSG && 
    !preg_match('|Deprecated|', $GLOBALS['php_errormsg']) ) {
    JpGraphError::RaiseL(25004,$GLOBALS['php_errormsg']);
}


// Useful mathematical function
function sign($a) {return $a >= 0 ? 1 : -1;}

// Utility function to generate an image name based on the filename we
// are running from and assuming we use auto detection of graphic format
// (top level), i.e it is safe to call this function
// from a script that uses JpGraph
function GenImgName() {
    // Determine what format we should use when we save the images
    $supported = imagetypes();
    if( $supported & IMG_PNG )	   $img_format="png";
    elseif( $supported & IMG_GIF ) $img_format="gif";
    elseif( $supported & IMG_JPG ) $img_format="jpeg";

    if( !isset($_SERVER['PHP_SELF']) )
	JpGraphError::RaiseL(25005);
//(" Can't access PHP_SELF, PHP global variable. You can't run PHP from command line if you want to use the 'auto' naming of cache or image files.");
    $fname = basename($_SERVER['PHP_SELF']);
    if( !empty($_SERVER['QUERY_STRING']) ) {
	$q = @$_SERVER['QUERY_STRING'];
	$fname .= '_'.preg_replace("/\W/", "_", $q).'.'.$img_format;
    }
    else {
	$fname = substr($fname,0,strlen($fname)-4).'.'.$img_format;
    }
    return $fname;
}

class LanguageConv {
    private $g2312 = null ;

    function Convert($aTxt,$aFF) {
	if( LANGUAGE_GREEK ) {
	    if( GREEK_FROM_WINDOWS ) {
		$unistring = LanguageConv::gr_win2uni($aTxt); 
	    } else  {
		$unistring = LanguageConv::gr_iso2uni($aTxt);
	    }
	    return $unistring;
	} elseif( LANGUAGE_CYRILLIC ) {
	    if( CYRILLIC_FROM_WINDOWS && (!defined('LANGUAGE_CHARSET') || stristr(LANGUAGE_CHARSET, 'windows-1251')) ) {
		$aTxt = convert_cyr_string($aTxt, "w", "k"); 
	    }
	    if( !defined('LANGUAGE_CHARSET') || stristr(LANGUAGE_CHARSET, 'koi8-r') || stristr(LANGUAGE_CHARSET, 'windows-1251')) {
		$isostring = convert_cyr_string($aTxt, "k", "i");
		$unistring = LanguageConv::iso2uni($isostring);
	    }
	    else {
		$unistring = $aTxt;
	    }
	    return $unistring;
	}
	elseif( $aFF === FF_SIMSUN ) {
	    // Do Chinese conversion
	    if( $this->g2312 == null ) {
		include_once 'jpgraph_gb2312.php' ;
		$this->g2312 = new GB2312toUTF8();
	    }
	    return $this->g2312->gb2utf8($aTxt);
	}
	elseif( $aFF === FF_CHINESE ) {
	    if( !function_exists('iconv') ) {
		JpGraphError::RaiseL(25006);
//('Usage of FF_CHINESE (FF_BIG5) font family requires that your PHP setup has the iconv() function. By default this is not compiled into PHP (needs the "--width-iconv" when configured).');
	    }
	    return iconv('BIG5','UTF-8',$aTxt);
	}
	elseif( ASSUME_EUCJP_ENCODING &&
		($aFF == FF_MINCHO || $aFF == FF_GOTHIC || $aFF == FF_PMINCHO || $aFF == FF_PGOTHIC) ) {
	    if( !function_exists('mb_convert_encoding') ) {
		JpGraphError::RaiseL(25127);
	    }
	    return mb_convert_encoding($aTxt, 'UTF-8','EUC-JP');
	}
	else 
	    return $aTxt;
    }

    // Translate iso encoding to unicode
    public static function iso2uni ($isoline){
	$uniline='';
	for ($i=0; $i < strlen($isoline); $i++){
	    $thischar=substr($isoline,$i,1);
	    $charcode=ord($thischar);
	    $uniline.=($charcode>175) ? "&#" . (1040+($charcode-176)). ";" : $thischar;
	}
	return $uniline;
    }

    // Translate greek iso encoding to unicode
    public static function gr_iso2uni ($isoline) {
	$uniline='';
	for ($i=0; $i < strlen($isoline); $i++)	{
	    $thischar=substr($isoline,$i,1);
	    $charcode=ord($thischar);
	    $uniline.=($charcode>179 && $charcode!=183 && $charcode!=187 && $charcode!=189) ? "&#" . (900+($charcode-180)). ";" : $thischar;
	}
	return $uniline;
    }

    // Translate greek win encoding to unicode
    public static function gr_win2uni ($winline) {
	$uniline='';
	for ($i=0; $i < strlen($winline); $i++) {
	    $thischar=substr($winline,$i,1);
	    $charcode=ord($thischar);
	    if ($charcode==161 || $charcode==162) {
		$uniline.="&#" . (740+$charcode). ";";
	    }
	    else {
		$uniline.=(($charcode>183 && $charcode!=187 && $charcode!=189) || $charcode==180) ? "&#" . (900+($charcode-180)). ";" : $thischar;
	    }
	}
	return $uniline;
    }
}

//===================================================
// CLASS JpgTimer
// Description: General timing utility class to handle
// time measurement of generating graphs. Multiple
// timers can be started.
//===================================================