[RESOLVED] image resize script bins out with files bigger than 400k!

[v3nt]

is there anyway of improving this script so it can handle bigger jpgs? or do you think it mostly depends on the server machine?

this is the error i get from the script;
Fatal error: Allowed memory size of 8388608 bytes exhausted (tried to allocate 7324 bytes) in /home/virtual/site230/fst/var/www/html/rundel/test/resize.php on line 17

scripts;

<?

include('resize.php');

$fname = "R001-145.JPG";
$smallname = 'fs_'.$fname;
$url=$fname;
ResizeJpeg($url, $smallname, 435);

?>

resize.php

<?PHP

  function ResizeJpeg($filename, $newfilename, $newheight, $quality = 90)
  {
    // parameters:
    //   $filename      filename of the source image (absolute or relative path)
    //   $newfilename   filename of the resized image file (absolute or relative path)
    //   $newheight     height of the resized image; width will be calculated to keep aspect ratio
    //   $quality       quality setting used when compressing the resize image (0..100)

// for large images, this is a costly operation
// and if called more than once inside a script
// we need to extend the scripts life a bit

  //  set_time_limit(120);

$im = imagecreatefromjpeg($filename);
if (!$im)
{
  return false;
}

$w = imagesx($im);
$h = imagesy($im);

$th = $newheight;
$tw = $w * $th / $h;

$dim = imagecreatetruecolor($tw, $th);

// remove gamma correction to get linear color space
  //  imagegammacorrect($im, 2.2, 1.0);

// use quality resample for scales < 2
imagecopyresampled($dim, $im, 0, 0, 0, 0, imagesx($dim), imagesy($dim), imagesx($im), imagesy($im));

imagedestroy($im);

// reapply gamma
  //  imagegammacorrect($dim, 1.0, 2.2);

imagejpeg($dim, $newfilename, $quality);

imagedestroy($dim);

return true;
  }
?>

thanks!

[goreSplatter]

This function is from PHP4 HTML Help:

function ImageCopyResampleBicubic($dst_img, $src_img, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h)
	{
		$scaleX = ($src_w - 1) / $dst_w;
		$scaleY = ($src_h - 1) / $dst_h;
		$scaleX2 = $scaleX / 2.0;
		$scaleY2 = $scaleY / 2.0;
		$tc = imageistruecolor($src_img);
		for ($y = $src_y; $y < $src_y + $dst_h; $y++)
			{
				$sY   = $y * $scaleY;
				$siY  = (int) $sY;
				$siY2 = (int) $sY + $scaleY2;
				for ($x = $src_x; $x < $src_x + $dst_w; $x++)
					{
						$sX   = $x * $scaleX;
						$siX  = (int) $sX;
						$siX2 = (int) $sX + $scaleX2;
						if ($tc)
							{
								$c1 = imagecolorat($src_img, $siX, $siY2);
								$c2 = imagecolorat($src_img, $siX, $siY);
								$c3 = imagecolorat($src_img, $siX2, $siY2);
								$c4 = imagecolorat($src_img, $siX2, $siY);
								$r = (($c1 + $c2 + $c3 + $c4) >> 2) & 0xFF0000;
								$g = ((($c1 & 0xFF00) + ($c2 & 0xFF00) + ($c3 & 0xFF00) + ($c4 & 0xFF00)) >> 2) & 0xFF00;
								$b = ((($c1 & 0xFF)   + ($c2 & 0xFF)   + ($c3 & 0xFF)   + ($c4 & 0xFF))   >> 2);
								imagesetpixel($dst_img, $dst_x + $x - $src_x, $dst_y + $y - $src_y, $r+$g+$b);
							}
						else
							{
								$c1 = imagecolorsforindex($src_img, imagecolorat($src_img, $siX, $siY2));
								$c2 = imagecolorsforindex($src_img, imagecolorat($src_img, $siX, $siY));
								$c3 = imagecolorsforindex($src_img, imagecolorat($src_img, $siX2, $siY2));
								$c4 = imagecolorsforindex($src_img, imagecolorat($src_img, $siX2, $siY));
								$r = ($c1['red']   + $c2['red']   + $c3['red']   + $c4['red']  ) << 14;
								$g = ($c1['green'] + $c2['green'] + $c3['green'] + $c4['green']) << 6;
								$b = ($c1['blue']  + $c2['blue']  + $c3['blue']  + $c4['blue'] ) >> 2;
								imagesetpixel($dst_img, $dst_x + $x - $src_x, $dst_y + $y - $src_y, $r+$g+$b);
							}
					}
			}
	} 

[ollybach]

change your php.ini to
memory_limit = 10M
(or whatever is big enough)

did the trick for me

[v3nt]

thanks guys. i didn't have access to the php.ini but i managed to get an .htaccess file working to increase the memory size.

D.