jpgraph.php

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<?php 
//=======================================================================
// File:	JPGRAPH.PHP
// Description:	PHP4 Graph Plotting library. Base module.
// Created: 	2001-01-08
// Author:	Johan Persson
// Ver:		$Id: jpgraph.php,v 1.25 2004/02/11 20:32:13 deskpro Exp $
//
// License:	This code is released under QPL 1.0 
// Copyright (C) 2001 - 2004 Johan Persson 
//========================================================================

//------------------------------------------------------------------------
// Directories for cache and font directory.
// Leave them undefined to use default values. 
// 
// Default values used if these defines are left commented out are:
// 
// UNIX: 
//   CACHE_DIR = /tmp/jpgraph_cache/
//   TTF_DIR   = /usr/X11R6/lib/X11/fonts/truetype/
//
// WINDOWS:
//   CACHE_DIR = $SERVER_TEMP/jpgraph_cache/
//   TTF_DIR   = $SERVER_SYSTEMROOT/fonts/
//    
//
//------------------------------------------------------------------------

// The full absolute name of the directory to be used to store the
// cached image files. This directory will not be used if the USE_CACHE
// define (further down) is false. If you enable the cache please note that
// this directory MUST be readable and writable for the process running PHP. 
// Must end with '/'
$tmpdir = INCLUDE_PATH . '../admin/graphs';
DEFINE("CACHE_DIR",$tmpdir);

// Directory for jpGraph TTF fonts. Must end with '/'
// DEFINE("TTF_DIR","/usr/X11R6/lib/X11/fonts/truetype/");


//-------------------------------------------------------------------------
// Cache directory specification for use with CSIM graphs that are
// using the cache.
// The directory must be the filesysystem name as seen by PHP
// and the 'http' version must be the same directory but as 
// seen by the HTTP server relative to the 'htdocs' ddirectory. 
// If a relative path is specified it is taken to be relative from where
// the image script is executed.
// Note: The default setting is to create a subdirectory in the 
// directory from where the image script is executed and store all files
// there. As ususal this directory must be writeable by the PHP process.
DEFINE("CSIMCACHE_DIR","csimcache/"); 
DEFINE("CSIMCACHE_HTTP_DIR","csimcache/");

//------------------------------------------------------------------------
// Various JpGraph Settings. Adjust accordingly to your
// preferences. Note that cache functionality is turned off by
// default (Enable by setting USE_CACHE to true)
//------------------------------------------------------------------------

// Deafult graphic format set to "auto" which will automatically
// choose the best available format in the order png,gif,jpg
// (The supported format depends on what your PHP installation supports)
DEFINE("DEFAULT_GFORMAT","auto");

// 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. Truecolor support is to be considered alpha since GD 2.x
// is still not considered stable (especially on Win32). 
// Note 3: MUST be enabled to get background images working with GD2
// Note 4: If enabled then truetype fonts will look very ugly with GD 2.0.1
// => You can't have both background images and truetype fonts in the same
// image until these bugs has been fixed in GD 2.01. There is a patch
// available for GD 2.0.1 though. See the README file.
DEFINE('USE_TRUECOLOR',true);

// Specify what version of the GD library is installed.
// If this is set to 'auto' the version will be automatically 
// determined.
// However since determining the library takes ~1ms you can also 
// manually specify the version if you know what version you have. 
// This means that you should 
// set this define to true if you have GD 2.x installed to save 1ms. 
DEFINE("USE_LIBRARY_GD2",'auto');

// Should the cache be used at all? By setting this to false no
// files will be generated in the cache directory.  
// The difference from READ_CACHE being that setting READ_CACHE to
// false will still create the image in the cache directory
// just not use it. By setting USE_CACHE=false no files will even
// be generated in the cache directory.
DEFINE("USE_CACHE",false);

// Should we try to find an image in the cache before generating it? 
// Set this define to false to bypass the reading of the cache and always
// regenerate the image. Note that even if reading the cache is 
// disabled the cached will still be updated with the newly generated
// image. Set also "USE_CACHE" below.
DEFINE("READ_CACHE",true);

// Determine if the error handler should be image based or purely
// text based. Image based makes it easier since the script will
// always return an image even in case of errors.
if (!defined('NO_GRAPHIC_HANDLER')) {
	DEFINE("USE_IMAGE_ERROR_HANDLER",true);
} else {
	DEFINE("USE_IMAGE_ERROR_HANDLER",false);
}

// If the color palette is full should JpGraph try to allocate
// the closest match? If you plan on using background images or
// gradient fills it might be a good idea to enable this.
// If not you will otherwise get an error saying that the color palette is 
// exhausted. The drawback of using approximations is that the colors 
// might not be exactly what you specified. 
// Note1: This does only apply to paletted images, not truecolor 
// images since they don't have the limitations of maximum number
// of colors.
DEFINE("USE_APPROX_COLORS",true);

// Special unicode cyrillic language support
DEFINE("LANGUAGE_CYRILLIC",false);

// If you are setting this config to true the conversion
// will assume that the input text is windows 1251, if
// false it will assume koi8-r
DEFINE("CYRILLIC_FROM_WINDOWS",false);

// Should usage of deprecated functions and parameters give a fatal error?
// (Useful to check if code is future proof.)
DEFINE("ERR_DEPRECATED",true);

// Should the time taken to generate each picture be branded to the lower
// left in corner in each generated image? Useful for performace measurements
// generating graphs
DEFINE("BRAND_TIMING",false);

// What format should be used for the timing string?
DEFINE("BRAND_TIME_FORMAT","(%01.3fs)");

//------------------------------------------------------------------------
// The following constants should rarely have to be changed !
//------------------------------------------------------------------------

// What group should the cached file belong to
// (Set to "" will give the default group for the "PHP-user")
// Please note that the Apache user must be a member of the
// specified group since otherwise it is impossible for Apache
// to set the specified group.
DEFINE("CACHE_FILE_GROUP","wwwadmin");

// What permissions should the cached file have
// (Set to "" will give the default persmissions for the "PHP-user")
DEFINE("CACHE_FILE_MOD",0664);

// Decide if we should use the bresenham circle algorithm or the
// built in Arc(). Bresenham gives better visual apperance of circles 
// but is more CPU intensive and slower then the built in Arc() function
// in GD. Turned off by default for speed
DEFINE("USE_BRESENHAM",false);

// Special file name to indicate that we only want to calc
// the image map in the call to Graph::Stroke() used
// internally from the GetHTMLCSIM() method.
DEFINE("_CSIM_SPECIALFILE","_csim_special_");

// HTTP GET argument that is used with image map
// to indicate to the script to just generate the image
// and not the full CSIM HTML page.
DEFINE("_CSIM_DISPLAY","_jpg_csimd");

// Special filename for Graph::Stroke(). If this filename is given
// then the image will NOT be streamed to browser of file. Instead the
// Stroke call will return the handler for the created GD image.
DEFINE("_IMG_HANDLER","__handle");

// DON'T SET THIS FLAG YORSELF THIS IS ONLY FOR INTERNAL TESTING
// PURPOSES. ENABLING THIS FLAG WILL MAKE SOME OF YOUR SCRIPT 
// STOP WORKING
// Enable some extra debug information for CSIM etc to be shown. 
DEFINE("JPG_DEBUG",false);

// Version info
DEFINE('JPG_VERSION','1.12');

//------------------------------------------------------------------------
// Automatic settings of path for cache and font directory
// if they have not been previously specified
//------------------------------------------------------------------------
if (!defined('CACHE_DIR')) {
    if ( strstr( PHP_OS, 'WIN') ) {
        if( empty($_SERVER['TEMP']) ) {
	    die('JpGraph Error: No path specified for CACHE_DIR. Please specify a path for that DEFINE in jpgraph.php');
        }
	else {
	   DEFINE('CACHE_DIR', $_SERVER['TEMP'] . '/');
        }
    } else {
	DEFINE('CACHE_DIR','/tmp/jpgraph_cache/');
    }
}

if (!defined('TTF_DIR')) {
    if (strstr( PHP_OS, 'WIN') ) {
        if( empty($_SERVER['SystemRoot']) ) {
	    die('JpGraph Error: No path specified for TTF_DIR. Please specify a path for that DEFINE in jpgraph.php');
        }
	else {
	  DEFINE('TTF_DIR', $_SERVER['SystemRoot'] . '/fonts/');
        }
    } else {
	DEFINE('TTF_DIR','/usr/X11R6/lib/X11/fonts/truetype/');
    }
}

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

// 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);

// Chinese font
DEFINE("FF_SIMSUN",18);

// Gnome Vera font
DEFINE("FF_VERA",19);
DEFINE("FF_VERAMONO",20);
DEFINE("FF_VERASERIF",21);


// 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);

//Definitions for internal font, old style
// (Only defined here to be able to generate an error mesage
// when used)
DEFINE("FONT0",99);		// Deprecated from 1.2
DEFINE("FONT1",98);		// Deprecated from 1.2
DEFINE("FONT1_BOLD",97);	// Deprecated from 1.2
DEFINE("FONT2",96);		// Deprecated from 1.2
DEFINE("FONT2_BOLD",95); 	// Deprecated from 1.2

// 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);

// 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);

// Styles for gradient color fill
DEFINE("GRAD_VER",1);
DEFINE("GRAD_VERT",1);
DEFINE("GRAD_HOR",2);
DEFINE("GRAD_MIDHOR",3);
DEFINE("GRAD_MIDVER",4);
DEFINE("GRAD_CENTER",5);
DEFINE("GRAD_WIDE_MIDVER",6);
DEFINE("GRAD_WIDE_MIDHOR",7);
DEFINE("GRAD_LEFT_REFLECTION",8);
DEFINE("GRAD_RIGHT_REFLECTION",9);

// 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);

// Constants for types of static bands in plot area
DEFINE("BAND_RDIAG",1);	// Right diagonal lines
DEFINE("BAND_LDIAG",2); // Left diagonal lines
DEFINE("BAND_SOLID",3); // Solid one color
DEFINE("BAND_VLINE",4); // Vertical lines
DEFINE("BAND_HLINE",5);  // Horizontal lines
DEFINE("BAND_3DPLANE",6);  // "3D" Plane
DEFINE("BAND_HVCROSS",7);  // Vertical/Hor crosses
DEFINE("BAND_DIAGCROSS",8); // Diagonal crosses

// 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);

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

//
// Get hold of gradient class (In Version 2.x)
// A client of the library has to manually include this
//

include INCLUDE_PATH . "graph/jpgraph_gradient.php";

//
// First of all set up a default error handler
//

//=============================================================
// The default trivial text error handler.
//=============================================================
class JpGraphErrObject {
    function JpGraphErrObject() {
	// Empty. Reserved for future use
    }

    // If aHalt is true then execution can't continue. Typical used for
    // fatal errors
    function Raise($aMsg,$aHalt=true) {
	$aMsg = "<b>JpGraph Error:</b> ".$aMsg;
	if( $aHalt )
	    die($aMsg);
	else 
	    echo $aMsg."<p>";
    }
}

//==============================================================
// An image based error handler
//==============================================================
class JpGraphErrObjectImg {