/**
* Lets you know if the image at the given path is too large for the server to process. We run
* this to avoid crashing when GD tries to process large images.
*
* When this function returns an array, that array has two components:
*
* - image_size - number of btyes of memory that we predict the uncompressed image will need AND
* - size_limit - the maximum size in bytes of what we believe we can process with GD
*
* @param string $path A file path
* @return mixed array describing image_size and size_limit of too big image or boolean FALSE
*/
function image_is_too_big($path)
{
if (!imagemagick_available()) {
$image_info = getimagesize($path);
$mem_usage = memory_get_usage();
$mem_limit = get_php_size_setting_as_bytes('memory_limit');
if ($image_info[2] == IMAGETYPE_JPEG) {
$image_size = $image_info[0] * $image_info[1] * $image_info['channels'] * $image_info['bits'] / 8;
$ratio = 0.5;
} elseif ($image_info[2] == IMAGETYPE_GIF) {
$bits = $image_info['bits'] < 6 ? 6 : $image_info['bits'];
$image_size = $image_info[0] * $image_info[1] * $image_info['channels'] * $bits / 8;
$ratio = 0.95;
} elseif ($image_info[2] == IMAGETYPE_PNG) {
$image_size = $image_info[0] * $image_info[1] * 4 * 16 / 8;
$ratio = 0.79;
}
if ($image_size / ($mem_limit - $mem_usage) > $ratio) {
return array('image_size' => $image_size, 'size_limit' => ($mem_limit - $mem_usage) * $ratio);
}
}
return FALSE;
}
function on_every_time_order()
{
$order = array();
if ($this->_is_element('cancel_text')) {
$order[] = 'cancel_text';
}
$order[] = 'source_selection_note';
$order[] = 'destination_selection_note';
for ($i = 1; $i <= $this->max_upload_number; $i++) {
$name = 'upload_' . $i;
$this->add_element($name, 'image_upload', array('max_width' => REASON_STANDARD_MAX_IMAGE_WIDTH, 'max_height' => REASON_STANDARD_MAX_IMAGE_HEIGHT));
$this->add_element($name . '_filename', 'hidden', array('userland_changeable' => true));
if (!imagemagick_available()) {
$size = get_approx_max_image_size();
$this->set_comments($name, 'Images with resolutions over ' . $size['res'] . ' or ' . $size['mps'] . ' MPs may cause errors');
}
$order[] = $name;
}
$this->set_order($order);
}
function on_every_time_order()
{
$order = array();
if ($this->_is_element('cancel_text')) {
$order[] = 'cancel_text';
}
$order[] = 'source_selection_note';
$order[] = 'destination_selection_note';
for ($i = 1; $i <= $this->max_upload_number; $i++) {
$name = 'upload_' . $i;
$this->add_element($name, 'image_upload', array('max_width' => REASON_STANDARD_MAX_IMAGE_WIDTH, 'max_height' => REASON_STANDARD_MAX_IMAGE_HEIGHT));
$this->add_element($name . '_filename', 'hidden', array('userland_changeable' => true));
if (!imagemagick_available()) {
$size = get_approx_max_image_size();
$this->set_comments($name, 'Images with resolutions over ' . $size['res'] . ' or ' . $size['mps'] . ' MPs may cause errors');
}
$order[] = $name;
}
/*
* add the ignore image size check option to allow upload of images of any size
*/
$this->add_element('ignore_min_img_size_check', 'checkbox', array('description' => 'Ignore minimum image size check.'));
$this->set_display_name('ignore_min_img_size_check', ' ');
$order[] = 'ignore_min_img_size_check';
$this->set_order($order);
}
