[Sommaire] [Imprimer]

   1  <?php
   2  /*=======================================================================
   3  // File:     JPGRAPH_MGRAPH.PHP
   4  // Description: Class to handle multiple graphs in the same image
   5  // Created:     2006-01-15
   6  // Ver:        $Id: jpgraph_mgraph.php 781 2006-10-08 08:07:47Z ljp $
   7  //
   8  // Copyright (c) Aditus Consulting. All rights reserved.
   9  //========================================================================
  10  */
  11  
  12  //=============================================================================
  13  // CLASS MGraph
  14  // Description: Create a container image that can hold several graph 
  15  //=============================================================================
  16  class MGraph {
  17  
  18      protected $img=NULL;
  19      protected $iCnt=0,$iGraphs = array(); // image_handle, x, y, fx, fy, sizex, sizey
  20      protected $iFillColor='white', $iCurrentColor=0;
  21      protected $lm=0,$rm=0,$tm=0,$bm=0;
  22      protected $iDoFrame = FALSE, $iFrameColor = 'black', $iFrameWeight = 1;
  23      protected $iLineWeight = 1;
  24      protected $expired=false;
  25      protected $img_format='png',$image_quality=75;
  26      protected $iWidth=NULL,$iHeight=NULL;
  27      protected $background_image='',$background_image_center=true,
  28      $backround_image_format='',$background_image_mix=100,
  29      $background_image_y=NULL, $background_image_x=NULL;
  30  
  31      // Create a new instane of the combined graph
  32      function MGraph($aWidth=NULL,$aHeight=NULL) {
  33      $this->iWidth = $aWidth;
  34      $this->iHeight = $aHeight;
  35      }
  36  
  37      // Specify background fill color for the combined graph
  38      function SetFillColor($aColor) {
  39      $this->iFillColor = $aColor;
  40      }
  41  
  42      // Add a frame around the combined graph
  43      function SetFrame($aFlg,$aColor='black',$aWeight=1) {
  44      $this->iDoFrame = $aFlg;
  45      $this->iFrameColor = $aColor;
  46      $this->iFrameWeight = $aWeight;
  47      }
  48  
  49      // Specify a background image blend    
  50      function SetBackgroundImageMix($aMix) {
  51      $this->background_image_mix = $aMix ;
  52      }
  53  
  54      // Specify a background image
  55      function SetBackgroundImage($aFileName,$aCenter_aX=NULL,$aY=NULL) {
  56      // Second argument can be either a boolean value or 
  57      // a numeric
  58      $aCenter=TRUE;
  59      $aX=NULL;
  60  
  61      if( $GLOBALS['gd2'] && !USE_TRUECOLOR ) {
  62          JpGraphError::RaiseL(12001);
  63  //("You are using GD 2.x and are trying to use a background images on a non truecolor image. To use background images with GD 2.x you <b>must</b> enable truecolor by setting the USE_TRUECOLOR constant to TRUE. Due to a bug in GD 2.0.1 using any truetype fonts with truecolor images will result in very poor quality fonts.");
  64      }
  65      if( is_numeric($aCenter_aX) ) {
  66          $aX=$aCenter_aX;
  67      }
  68  
  69      // Get extension to determine image type
  70      $e = explode('.',$aFileName);
  71      if( !$e ) {
  72          JpGraphError::RaiseL(12002,$aFileName);
  73  //('Incorrect file name for MGraph::SetBackgroundImage() : '.$aFileName.' Must have a valid image extension (jpg,gif,png) when using autodetection of image type');
  74      }
  75      
  76      $valid_formats = array('png', 'jpg', 'gif');
  77      $aImgFormat = strtolower($e[count($e)-1]);
  78      if ($aImgFormat == 'jpeg')  {
  79          $aImgFormat = 'jpg';
  80      }
  81      elseif (!in_array($aImgFormat, $valid_formats) )  {
  82          JpGraphError::RaiseL(12003,$aImgFormat,$aFileName);
  83  //('Unknown file extension ($aImgFormat) in MGraph::SetBackgroundImage() for filename: '.$aFileName);
  84      }    
  85  
  86      $this->background_image = $aFileName;
  87      $this->background_image_center=$aCenter;
  88      $this->background_image_format=$aImgFormat;
  89      $this->background_image_x = $aX;
  90      $this->background_image_y = $aY;
  91      }
  92  
  93  
  94      // Private helper function for backgound image
  95      function _loadBkgImage($aFile='') {
  96      if( $aFile == '' )
  97          $aFile = $this->background_image;
  98  
  99      // Remove case sensitivity and setup appropriate function to create image
 100      // Get file extension. This should be the LAST '.' separated part of the filename
 101      $e = explode('.',$aFile);
 102      $ext = strtolower($e[count($e)-1]);
 103      if ($ext == "jpeg")  {
 104          $ext = "jpg";
 105      }
 106      
 107      if( trim($ext) == '' ) 
 108          $ext = 'png';  // Assume PNG if no extension specified
 109  
 110      $supported = imagetypes();
 111      if( ( $ext == 'jpg' && !($supported & IMG_JPG) ) ||
 112          ( $ext == 'gif' && !($supported & IMG_GIF) ) ||
 113          ( $ext == 'png' && !($supported & IMG_PNG) ) ) {
 114          JpGraphError::RaiseL(12004,$aFile);//('The image format of your background image ('.$aFile.') is not supported in your system configuration. ');
 115      }
 116  
 117      if( $ext == "jpg" || $ext == "jpeg") {
 118          $f = "imagecreatefromjpeg";
 119          $ext = "jpg";
 120      }
 121      else {
 122          $f = "imagecreatefrom".$ext;
 123      }
 124  
 125      $img = @$f($aFile);
 126      if( !$img ) {
 127          JpGraphError::RaiseL(12005,$aFile);
 128  //(" Can't read background image: '".$aFile."'");   
 129      }
 130      return $img;
 131      }    
 132  
 133      function _strokeBackgroundImage() {
 134      if( $this->background_image == '' ) 
 135          return;
 136  
 137      $bkgimg = $this->_loadBkgImage();
 138      // Background width & Heoght
 139      $bw = imagesx($bkgimg);
 140      $bh = imagesy($bkgimg);
 141      // Canvas width and height
 142      $cw = imagesx($this->img);
 143      $ch = imagesy($this->img);
 144  
 145      if( $this->background_image_x === NULL || $this->background_image_y === NULL ) {
 146          if( $this->background_image_center ) {
 147          // Center original image in the plot area
 148          $x = round($cw/2-$bw/2); $y = round($ch/2-$bh/2);
 149          }
 150          else {
 151          // Just copy the image from left corner, no resizing
 152          $x=0; $y=0;
 153          }            
 154      }
 155      else {
 156          $x = $this->background_image_x;
 157          $y = $this->background_image_y;
 158      }
 159      $this->_imageCp($bkgimg,$x,$y,0,0,$bw,$bh,$this->background_image_mix);
 160      }
 161  
 162      function _imageCp($aSrcImg,$x,$y,$fx,$fy,$w,$h,$mix=100) {
 163      imagecopymerge($this->img,$aSrcImg,$x,$y,$fx,$fy,$w,$h,$mix);
 164      }
 165  
 166      function _imageCreate($aWidth,$aHeight) {
 167      if( $aWidth <= 1 || $aHeight <= 1 ) {
 168          JpGraphError::RaiseL(12006,$aWidth,$aHeight);
 169  //("Illegal sizes specified for width or height when creating an image, (width=$aWidth, height=$aHeight)");
 170      }
 171      if( @$GLOBALS['gd2']==true && USE_TRUECOLOR ) {
 172          $this->img = @imagecreatetruecolor($aWidth, $aHeight);
 173          if( $this->img < 1 ) {
 174          JpGraphError::RaiseL(12011);
 175  // die("<b>JpGraph Error:</b> Can't create truecolor image. Check that you really have GD2 library installed.");
 176          }
 177          ImageAlphaBlending($this->img,true);
 178      } else {
 179          $this->img = @imagecreate($aWidth, $aHeight);    
 180          if( $this->img < 1 ) {
 181          JpGraphError::RaiseL(12012);
 182  // die("<b>JpGraph Error:</b> Can't create image. Check that you really have the GD library installed.");
 183          }
 184      }
 185      }
 186  
 187      function _polygon($p,$closed=FALSE) {
 188      if( $this->iLineWeight==0 ) return;
 189      $n=count($p);
 190      $oldx = $p[0];
 191      $oldy = $p[1];
 192      for( $i=2; $i < $n; $i+=2 ) {
 193          imageline($this->img,$oldx,$oldy,$p[$i],$p[$i+1],$this->iCurrentColor);
 194          $oldx = $p[$i];
 195          $oldy = $p[$i+1];
 196      }
 197      if( $closed ) {
 198          imageline($this->img,$p[$n*2-2],$p[$n*2-1],$p[0],$p[1],$this->iCurrentColor);
 199      }
 200      }
 201  
 202      function _filledPolygon($pts) {
 203      $n=count($pts);
 204      for($i=0; $i < $n; ++$i) 
 205          $pts[$i] = round($pts[$i]);
 206      imagefilledpolygon($this->img,$pts,count($pts)/2,$this->iCurrentColor);
 207      }
 208      
 209      function _rectangle($xl,$yu,$xr,$yl) {
 210      for($i=0; $i < $this->iLineWeight; ++$i ) 
 211          $this->_polygon(array($xl+$i,$yu+$i,$xr-$i,$yu+$i,
 212                    $xr-$i,$yl-$i,$xl+$i,$yl-$i,
 213                    $xl+$i,$yu+$i));
 214      }
 215      
 216      function _filledRectangle($xl,$yu,$xr,$yl) {
 217      $this->_filledPolygon(array($xl,$yu,$xr,$yu,$xr,$yl,$xl,$yl));
 218      }
 219  
 220      function _setColor($aColor) {
 221      $this->iCurrentColor = $this->iRGB->Allocate($aColor);
 222      }
 223  
 224      function AddMix($aGraph,$x=0,$y=0,$mix=100,$fx=0,$fy=0,$w=0,$h=0) {
 225      $this->_gdImgHandle($aGraph->Stroke( _IMG_HANDLER),$x,$y,$fx=0,$fy=0,$w,$h,$mix);
 226      }
 227      
 228      function Add($aGraph,$x=0,$y=0,$fx=0,$fy=0,$w=0,$h=0) {
 229      $this->_gdImgHandle($aGraph->Stroke( _IMG_HANDLER),$x,$y,$fx=0,$fy=0,$w,$h);
 230      }
 231  
 232      function _gdImgHandle($agdCanvas,$x,$y,$fx=0,$fy=0,$w=0,$h=0,$mix=100) {
 233      if( $w == 0 )  $w = @imagesx($agdCanvas);
 234      if( $w === NULL ) {
 235          JpGraphError::RaiseL(12007);
 236  //('Argument to MGraph::Add() is not a valid GD image handle.');
 237          return;
 238      }
 239      if( $h == 0 )  $h = @imagesy($agdCanvas);
 240      $this->iGraphs[$this->iCnt++] = array($agdCanvas,$x,$y,$fx,$fy,$w,$h,$mix);
 241      }
 242  
 243      function SetMargin($lm,$rm,$tm,$bm) {
 244      $this->lm = $lm;
 245      $this->rm = $rm;
 246      $this->tm = $tm;
 247      $this->bm = $bm;
 248      }
 249  
 250      function SetExpired($aFlg=true) {
 251      $this->expired = $aFlg;
 252      }
 253  
 254      // Generate image header
 255      function Headers() {
 256      
 257      // In case we are running from the command line with the client version of
 258      // PHP we can't send any headers.
 259      $sapi = php_sapi_name();
 260      if( $sapi == 'cli' )
 261          return;
 262      
 263      if( headers_sent() ) {
 264          
 265          echo "<table border=1><tr><td><font color=darkred size=4><b>JpGraph Error:</b> 
 266  HTTP headers have already been sent.</font></td></tr><tr><td><b>Explanation:</b><br>HTTP headers have already been sent back to the browser indicating the data as text before the library got a chance to send it's image HTTP header to this browser. This makes it impossible for the library to send back image data to the browser (since that would be interpretated as text by the browser and show up as junk text).<p>Most likely you have some text in your script before the call to <i>Graph::Stroke()</i>. If this texts gets sent back to the browser the browser will assume that all data is plain text. Look for any text, even spaces and newlines, that might have been sent back to the browser. <p>For example it is a common mistake to leave a blank line before the opening \"<b>&lt;?php</b>\".</td></tr></table>";
 267  
 268      die();
 269  
 270      }    
 271      
 272      if ($this->expired) {
 273          header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
 274          header("Last-Modified: " . gmdate("D, d M Y H:i:s") . "GMT");
 275          header("Cache-Control: no-cache, must-revalidate");
 276          header("Pragma: no-cache");
 277      }
 278      header("Content-type: image/$this->img_format");
 279      }
 280  
 281      function SetImgFormat($aFormat,$aQuality=75) {
 282      $this->image_quality = $aQuality;
 283      $aFormat = strtolower($aFormat);
 284      $tst = true;
 285      $supported = imagetypes();
 286      if( $aFormat=="auto" ) {
 287          if( $supported & IMG_PNG )
 288          $this->img_format="png";
 289          elseif( $supported & IMG_JPG )
 290          $this->img_format="jpeg";
 291          elseif( $supported & IMG_GIF )
 292          $this->img_format="gif";
 293          else
 294          JpGraphError::RaiseL(12008);
 295  //(" Your PHP (and GD-lib) installation does not appear to support any known graphic formats.".
 296          return true;
 297      }
 298      else {
 299          if( $aFormat=="jpeg" || $aFormat=="png" || $aFormat=="gif" ) {
 300          if( $aFormat=="jpeg" && !($supported & IMG_JPG) )
 301              $tst=false;
 302          elseif( $aFormat=="png" && !($supported & IMG_PNG) ) 
 303              $tst=false;
 304          elseif( $aFormat=="gif" && !($supported & IMG_GIF) )     
 305              $tst=false;
 306          else {
 307              $this->img_format=$aFormat;
 308              return true;
 309          }
 310          }
 311          else 
 312          $tst=false;
 313          if( !$tst )
 314          JpGraphError::RaiseL(12009,$aFormat);
 315  //(" Your PHP installation does not support the chosen graphic format: $aFormat");
 316      }
 317      }
 318  
 319      // Stream image to browser or to file
 320      function Stream($aFile="") {
 321      $func="image".$this->img_format;
 322      if( $this->img_format=="jpeg" && $this->image_quality != null ) {
 323          $res = @$func($this->img,$aFile,$this->image_quality);
 324      }
 325      else {
 326          if( $aFile != "" ) {
 327          $res = @$func($this->img,$aFile);
 328          }
 329          else
 330          $res = @$func($this->img);
 331      }
 332      if( !$res )
 333          JpGraphError::RaiseL(12010,$aFile);
 334  //("Can't create or stream image to file $aFile Check that PHP has enough permission to write a file to the current directory.");
 335      }
 336  
 337      function Stroke($aFileName='') {
 338      // Find out the necessary size for the container image
 339      $w=0; $h=0;
 340      for($i=0; $i < $this->iCnt; ++$i ) {
 341          $maxw = $this->iGraphs[$i][1]+$this->iGraphs[$i][5];
 342          $maxh = $this->iGraphs[$i][2]+$this->iGraphs[$i][6];
 343          $w = max( $w, $maxw );
 344          $h = max( $h, $maxh );
 345      }
 346      $w += $this->lm+$this->rm;
 347      $h += $this->tm+$this->bm;
 348  
 349      // User specified width,height overrides
 350      if( $this->iWidth !== NULL ) $w = $this->iWidth;
 351      if( $this->iHeight!== NULL ) $h = $this->iHeight;
 352  
 353      $this->_imageCreate($w,$h);
 354      $this->iRGB = new RGB($this->img);
 355  
 356      $this->_setcolor($this->iFillColor);
 357      $this->_filledRectangle(0,0,$w-1,$h-1);
 358  
 359      $this->_strokeBackgroundImage();
 360  
 361      if( $this->iDoFrame ) {
 362          $this->_setColor($this->iFrameColor);
 363          $this->iLineWeight=$this->iFrameWeight;
 364          $this->_rectangle(0,0,$w-1,$h-1);
 365      }
 366  
 367      // Copy all sub graphs to the container
 368      for($i=0; $i < $this->iCnt; ++$i ) {
 369          $this->_imageCp($this->iGraphs[$i][0],
 370                  $this->iGraphs[$i][1]+$this->lm,$this->iGraphs[$i][2]+$this->tm,
 371                  $this->iGraphs[$i][3],$this->iGraphs[$i][4],
 372                  $this->iGraphs[$i][5],$this->iGraphs[$i][6],
 373                  $this->iGraphs[$i][7]);
 374      }
 375  
 376      // Output image
 377      if( $aFileName == _IMG_HANDLER ) {
 378          return $this->img;
 379      }
 380      else {
 381          $this->Headers();
 382          $this->Stream($aFileName);
 383      }
 384      }
 385  }
 386  
 387  ?>