Php > Graphics

Resizing a displayed image without GD

Resizing a displayed image without GD

<?    // Resizer.php 

// I wrote this function  so  that I could display thumbnails of pictures users 
// uploaded without having to actually modify the file.  This function will return 
// a height and width  to put in your <IMG> tag that will be proportionate to each 
// other.  Again, the actual file is not modified, and GD is NOT required.  Modifying 
// this to your needs should be pretty simple, but this will give you an idea on 
// how to do it. 

         
$pic = "image.jpg";            // This is the name of the image to modify 
$dimensions = resize($pic);         // Here we call our function to get new 
height/width for the image. 

// Print it all our 
echo "<HTML>\n<BODY>\n"; 
echo "<img src=\"$pic\" width=\"$dimensions[0]\" height=\"$dimensions[1]\"/>\n"; 
echo "</BODY>\n</HTML>"; 

function resize($v_pic) {        // This is our main function 

   $largestside = 120;            // This is the size of the LARGEST SIZE we 
want either our width or height to be 
   $size = GetImageSize ("$v_pic");    // Get the actual width/height of the 
image... 

   $width = $size[0]; 
   $height = $size[1]; 

   if ($width == $height) {        // If the  height == width 
      $dimensions[0] = $largestside;    // Assign both width and height the value of 
$largestsize 
      $dimensions[1] = $largestside; 
   } elseif ($width > $height) {        // If the width is greater than the 
height 
      $divisor = $width / $largestside; 
      $height = $height / $divisor; 
      $dimensions[0] = $largestsize;    // Assign $largestsize to width 
      $dimensions[1] = intval ($height);    // and assign $height a 
proportionate value to $height 
   } elseif ($width < $height) {        // If width is less than height 
      $divisor = $height / 120; 
      $width = $width / $divisor; 
      $dimensions[0] = intval ($width);    // Set width to be proportionate to height 
      $dimensions[1] = 120;        // Set height to be $largestsize 
   } 

   return $dimensions; 
} 
?>