[Sommaire] [Imprimer]

   1  <?php
   2  # ***** BEGIN LICENSE BLOCK *****
   3  # This file is part of DotClear.
   4  # Copyright (c) 2004 Olivier Meunier and contributors. All rights
   5  # reserved.
   6  #
   7  # DotClear is free software; you can redistribute it and/or modify
   8  # it under the terms of the GNU General Public License as published by
   9  # the Free Software Foundation; either version 2 of the License, or
  10  # (at your option) any later version.
  11  # 
  12  # DotClear is distributed in the hope that it will be useful,
  13  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  # GNU General Public License for more details.
  16  # 
  17  # You should have received a copy of the GNU General Public License
  18  # along with DotClear; if not, write to the Free Software
  19  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  #
  21  # ***** END LICENSE BLOCK *****
  22  
  23  class images
  24  {
  25  	function cropImg($uri,$file,$dest_type,$w=120,$h=200)
  26      {
  27          if (!file_exists($uri)) {
  28              return false;
  29          }
  30          
  31          if (($size = @getimagesize($uri)) === false) {
  32              return false;
  33          }
  34          
  35          $type = $size[2];
  36          $H = $size[1];
  37          $W = $size[0];
  38          
  39          if ($type == '2') {
  40              $function = 'imagecreatefromjpeg';
  41          } elseif ($type == '3') {
  42              $function = 'imagecreatefrompng';
  43          } else {
  44              return false;
  45          }
  46          
  47          if (!function_exists($function)) {
  48              return false;
  49          }
  50          
  51          if (($img = @$function($uri)) == false) {
  52              return false;
  53          }
  54          
  55          # Si original plus petit
  56          if ($H <= $h && $W <= $w)
  57          {
  58              if (copy($uri,$file) !== false) {
  59                  return true;
  60              } else {
  61                  return false;
  62              }
  63          }
  64          
  65          $rB = $H/$W;
  66          $rS = $h/$w;
  67          if (($H > $h) && ($W > $w)) {
  68              if ($rB > $rS) {
  69                  $height = $h;
  70                  $width  = $height/$rB;
  71              } else {
  72                  $width = $w;
  73                  $height = $width*$rB; 
  74              }
  75          } elseif ($H > $h) {
  76              $height = $h;
  77              $width  = $height/$rB;
  78          } elseif ($W > $w) {
  79              $width = $w;
  80              $height = $width*$rB; 
  81          } else {
  82              $height = $H;
  83              $width  = $W;
  84          }
  85          
  86          $zx = $W/$width;
  87          $zy = $H/$height;
  88          
  89          $create_function = images::checkTrueColor() ? 'imagecreatetruecolor' : 'imagecreate';
  90          
  91          if (($img2 = $create_function(round($width),round($height)))  === false) {
  92              return false;
  93          }
  94          
  95          //images::CopyResampleBicubic($img2,$img,0,0,0,0,$width,$height,$zx,$zy);
  96          imagecopyresized($img2,$img,0,0,0,0,round($width),round($height),$W,$H);
  97          
  98          if (!is_dir(dirname($file))) {
  99              $dmod = fileperms(dirname(dirname($file)));
 100              if (@mkdir(dirname($file),$dmod) === false) {
 101                  return false;
 102              }
 103              chmod(dirname($file),$dmod);
 104          }
 105          
 106          if ($dest_type == 'png') {
 107              $endfunction = 'imagepng';
 108          } elseif ($dest_type == 'jpeg') {
 109              $endfunction = 'imagejpeg';
 110          }
 111          
 112          if (@$endfunction($img2,$file,80) === false) {
 113              return false;
 114          }
 115          chmod($file,fileperms(dirname($file)) & ~0111);
 116          
 117          imagedestroy($img2);
 118          return true;
 119      }
 120      
 121  	function CopyResampleBicubic(&$dst, &$src, $dstx, $dsty, $srcx, $srcy, $w, $h, $zoomX, $zoomY = '')
 122      {
 123          if (!$zoomY) {
 124              $zoomY = $zoomX;
 125          }
 126          
 127          $palsize = ImageColorsTotal($src);
 128          
 129          for ($i = 0; $i<$palsize; $i++)
 130          {
 131              $colors = ImageColorsForIndex($src, $i);
 132              ImageColorAllocate($dst, $colors['red'], $colors['green'], $colors['blue']);
 133          }
 134          
 135          $zoomX2 = (int)($zoomX/2);
 136          $zoomY2 = (int)($zoomY/2);
 137          
 138          $dstX = imagesx($dst);
 139          $dstY = imagesy($dst);
 140          $srcX = imagesx($src);
 141          $srcY = imagesy($src);
 142          
 143          for ($j = 0; $j<($h-$dsty); $j++)
 144          {
 145              $sY = (int)($j*$zoomY)+$srcy;
 146              $y13 = $sY+$zoomY2;
 147              $dY = $j+$dsty;
 148              
 149              if (($sY >= $srcY) or ($dY >= $dstY) or ($y13 >= $srcY)) {
 150                  break 1;
 151              }
 152              
 153              for ($i = 0; $i<($w-$dstx); $i++)
 154              {
 155                  $sX = (int)($i*$zoomX)+$srcx;
 156                  $x34 = $sX+$zoomX2;
 157                  $dX = $i+$dstx;
 158                  
 159                  if (($sX >= $srcX) or ($dX >= $dstX) or ($x34 >= $srcX)) {
 160                      break 1;
 161                  }
 162                  
 163                  $c1 = ImageColorsForIndex($src, ImageColorAt($src, $sX, $y13));
 164                  $c2 = ImageColorsForIndex($src, ImageColorAt($src, $sX, $sY));
 165                  $c3 = ImageColorsForIndex($src, ImageColorAt($src, $x34, $y13));
 166                  $c4 = ImageColorsForIndex($src, ImageColorAt($src, $x34, $sY));
 167                  
 168                  $r = ($c1['red']+$c2['red']+$c3['red']+$c4['red'])/4;
 169                  $g = ($c1['green']+$c2['green']+$c3['green']+$c4['green'])/4;
 170                  $b = ($c1['blue']+$c2['blue']+$c3['blue']+$c4['blue'])/4;
 171                  
 172                  ImageSetPixel($dst, $dX, $dY, ImageColorClosest($dst, $r, $g, $b));
 173              }
 174          }
 175      }
 176      
 177  	function type($p)
 178      {
 179          if (($size = @getimagesize($p)) === false) {
 180              return false;
 181          }
 182          
 183          $type = $size[2];
 184          
 185          if ($type == '1') {
 186              return 'gif';
 187          } elseif ($type == '2') {
 188              return 'jpeg';
 189          } elseif ($type == '3') {
 190              return 'png';
 191          } else {
 192              return false;
 193          }
 194      }
 195      
 196  	function checkTrueColor()
 197      {
 198          if (function_exists('gd_info'))
 199          {
 200              $gdinfo = gd_info();
 201              $gdversion = $gdinfo['GD Version'];
 202              if (strpos($gdversion,'2.') !== false) {
 203                  return true;
 204              }
 205          }
 206          
 207          return false;
 208      }
 209  }
 210  ?>