source: trunk/includes/graphic.inc.php @ 782

<?php
/******************************************************************************/
//                                                                            //
//                             InstantCMS v1.8                                //
//                        http://www.instantcms.ru/                           //
//                                                                            //
//                   written by InstantCMS Team, 2007-2010                    //
//                produced by InstantSoft, (www.instantsoft.ru)               //
//                                                                            //
//                        LICENSED BY GNU/GPL v2                              //
//                                                                            //
/******************************************************************************/

if(!defined('VALID_CMS')) { die('ACCESS DENIED'); }

function img_add_watermark($src){
  $size = getimagesize($src);

  if ($size === false) return false;

  $format = strtolower(substr($size['mime'], strpos($size['mime'], '/')+1));
  $icfunc = "imagecreatefrom" . $format;
  if (!function_exists($icfunc)) return false;

  $isrc = $icfunc($src);

  img_watermark($isrc, $size[0], $size[1]);
  
   // âûâîä êàðòèíêè è î÷èñòêà ïàìÿòè
  imagejpeg($isrc,$src,80); 

}

function img_watermark(&$img, $w, $h){

    $inConf = cmsConfig::getInstance();

    if (!$inConf->wmark) { return; }

        $wm_file =      $_SERVER['DOCUMENT_ROOT'].'/images/'.$inConf->wmark;

    if (!file_exists($wm_file)) { return; }

    $size = getimagesize($wm_file);             
        
        $wm = imagecreatefrompng($wm_file);
        
        $wm_w = $size[0];
        $wm_h = $size[1];
        
        $wm_x = $w - $wm_w;
        $wm_y = $h - $wm_h;
        
        imagecopyresampled($img, $wm, $wm_x, $wm_y, 0, 0, $wm_w, $wm_h, $wm_w, $wm_h);
                                
}

/***********************************************************************************
Ôóíêöèÿ img_resize(): ãåíåðàöèÿ thumbnails
Ïàðàìåòðû:
  $src             - èìÿ èñõîäíîãî ôàéëà
  $dest            - èìÿ ãåíåðèðóåìîãî ôàéëà
  $width, $height  - øèðèíà è âûñîòà ãåíåðèðóåìîãî èçîáðàæåíèÿ, â ïèêñåëÿõ
Íåîáÿçàòåëüíûå ïàðàìåòðû:
  $rgb             - öâåò ôîíà, ïî óìîë÷àíèþ - áåëûé
  $quality         - êà÷åñòâî ãåíåðèðóåìîãî JPEG, ïî óìîë÷àíèþ - ìàêñèìàëüíîå (100)
***********************************************************************************/
function img_resize($src, $dest, $maxwidth, $maxheight=160, $is_square=false, $watermark=false, $rgb=0xFFFFFF, $quality=80)
{
  if (!file_exists($src)) return false;

  $upload_dir = dirname($dest);         
  if (!is_writable($upload_dir)){ @chmod($dest, 0755); }

  $size = getimagesize($src);

  if ($size === false) return false;

  $new_width   = $size[0];
  $new_height  = $size[1];

  if (($new_height <= $maxheight) && ($new_width <= $maxwidth)){
      @copy($src, $dest);
      return true;
  }

  // Îïðåäåëÿåì èñõîäíûé ôîðìàò ïî MIME-èíôîðìàöèè, ïðåäîñòàâëåííîé
  // ôóíêöèåé getimagesize, è âûáèðàåì ñîîòâåòñòâóþùóþ ôîðìàòó
  // imagecreatefrom-ôóíêöèþ.
  $format = strtolower(substr($size['mime'], strpos($size['mime'], '/')+1));
  $icfunc = "imagecreatefrom" . $format;
  if (!function_exists($icfunc)) return false;

  $isrc = $icfunc($src);

  if($is_square){
          $idest = imagecreatetruecolor($maxwidth,$maxwidth);
          imagefill($idest, 0, 0, $rgb);           
          // âûðåçàåì êâàäðàòíóþ ñåðåäèíêó ïî x, åñëè ôîòî ãîðèçîíòàëüíîå
          if ($new_width>$new_height)
          imagecopyresampled($idest, $isrc, 0, 0, round((max($new_width,$new_height)-min($new_width,$new_height))/2), 0, $maxwidth, $maxwidth, min($new_width,$new_height), min($new_width,$new_height));       
          // âûðåçàåì êâàäðàòíóþ âåðõóøêó ïî y,
          if ($new_width<$new_height)
          imagecopyresampled($idest, $isrc, 0, 0, 0, 0, $maxwidth, $maxwidth, min($new_width,$new_height), min($new_width,$new_height));
          // êâàäðàòíàÿ êàðòèíêà ìàñøòàáèðóåòñÿ áåç âûðåçîê
          if ($new_width==$new_height)
           imagecopyresampled($idest, $isrc, 0, 0, 0, 0, $maxwidth, $maxwidth, $new_width, $new_width);
  } else {
          while ($new_width>$maxwidth) { $new_width *= 0.99; $new_height *= 0.99; }     
          while ($new_height>$maxheight) { $new_width *= 0.99; $new_height *= 0.99; }   
          $idest = imagecreatetruecolor($new_width, $new_height);
          imagefill($idest, 0, 0, $rgb);
          imagecopyresampled($idest, $isrc, 0, 0, 0, 0, $new_width, $new_height, $size[0], $size[1]);
          
  }
  
  if ($watermark) { img_watermark($idest, $new_width, $new_height); }         

  imageinterlace($idest,1);

  // âûâîä êàðòèíêè è î÷èñòêà ïàìÿòè
  imagejpeg($idest,$dest,$quality);

  imagedestroy($isrc);
  imagedestroy($idest);
  return true;
}
?>