Add option to enforce dimension restrictions without resizing

See http://drupal.org/node/119585 to continue discussion.

I agree that this would be a useful feature, and I think I would have to disagree that http://drupal.org/node/119585 is a duplicate of this request.

Moving this over to FileField.

The "automatic resize" functionality seems to be happening in filefield.module, line 757. With the following code, FileField attempts to resize an image that is too large:

<?php
        // Try to resize the image to fit the dimensions.
        elseif (image_get_toolkit() && @image_scale($file->filepath, $file->filepath, $max_width, $max_height)) {
          drupal_set_message(t('The image was resized to fit within the maximum allowed dimensions of %dimensions pixels.', array('%dimensions' => $maximum_dimensions)));

          // Clear the cached filesize and refresh the image information.
          clearstatcache();
          $info = image_get_info($file->filepath);
          $file->filesize = $info['file_size'];
        }
        else {
          $errors[] = t('The image is too large; the maximum dimensions are %dimensions pixels.', array('%dimensions' => $maximum_dimensions));
        }
?>

Would it make sense for the module to do something like this instead?

<?php
        elseif (variable_get('filefield_resize_maximum', 1) == 1 && image_get_toolkit() && @image_scale($file->filepath, $file->filepath, $max_width, $max_height)) {
          // Resize.
        }
        else {
          // Display error message.
        }
?>

Of course, an interface would need to be built to allow the user to specify whether or not he would like FileField to automatically resize images that are too large (the "filefield_resize_maximum" variable), but I think this would be an easy, useful improvement for the module.

Subscribing. I'd like to see that the resizing will only happen on images that fall between certain dimensions specified. All other should just be rejected.

Why on a scale? Because it is almost impossible for the laymen users to hit an exact files size. Most user will get images from a camera, maybe use bundled software to minimally edit, but with file sizes getting bigger I would have to add A LOT more ram to my server, just to keep up.