/**
* Resizes the image with the given id according to the configured max width and height settings
* renders a json response indicating success/failure and dies
*/
function imsanity_resize_image()
{
imsanity_verify_permission();
global $wpdb;
$id = intval($_POST['id']);
if (!$id) {
$results = array('success' => false, 'message' => __('Missing ID Parameter', 'imsanity'));
echo json_encode($results);
die;
}
// @TODO: probably doesn't need the join...?
$query = $wpdb->prepare("select\n\t\t\t\t{$wpdb->posts}.ID as ID,\n\t\t\t\t{$wpdb->posts}.guid as guid,\n\t\t\t\t{$wpdb->postmeta}.meta_value as file_meta\n\t\t\t\tfrom {$wpdb->posts}\n\t\t\t\tinner join {$wpdb->postmeta} on {$wpdb->posts}.ID = {$wpdb->postmeta}.post_id and {$wpdb->postmeta}.meta_key = %s\n\t\t\t\twhere {$wpdb->posts}.ID = %d\n\t\t\t\tand {$wpdb->posts}.post_type = %s\n\t\t\t\tand {$wpdb->posts}.post_mime_type like %s", array('_wp_attachment_metadata', $id, 'attachment', 'image%'));
$images = $wpdb->get_results($query);
if ($images) {
$image = $images[0];
$meta = unserialize($image->file_meta);
$uploads = wp_upload_dir();
$oldPath = $uploads['basedir'] . "/" . $meta['file'];
$maxW = imsanity_get_option('imsanity_max_width', IMSANITY_DEFAULT_MAX_WIDTH);
$maxH = imsanity_get_option('imsanity_max_height', IMSANITY_DEFAULT_MAX_HEIGHT);
// method one - slow but accurate, get file size from file itself
// list($oldW, $oldH) = getimagesize( $oldPath );
// method two - get file size from meta, fast but resize will fail if meta is out of sync
$oldW = $meta['width'];
$oldH = $meta['height'];
if ($oldW > $maxW && $maxW > 0 || $oldH > $maxH && $maxH > 0) {
$quality = imsanity_get_option('imsanity_quality', IMSANITY_DEFAULT_QUALITY);
list($newW, $newH) = wp_constrain_dimensions($oldW, $oldH, $maxW, $maxH);
$resizeResult = imsanity_image_resize($oldPath, $newW, $newH, false, null, null, $quality);
// $resizeResult = new WP_Error('invalid_image', __('Could not read image size'), $oldPath); // uncommend to debug fail condition
if (!is_wp_error($resizeResult)) {
$newPath = $resizeResult;
if ($newPath != $oldPath) {
// remove original and replace with re-sized image
unlink($oldPath);
rename($newPath, $oldPath);
}
$meta['width'] = $newW;
$meta['height'] = $newH;
// @TODO replace custom query with update_post_meta
$update_query = $wpdb->prepare("update {$wpdb->postmeta}\n\t\t\t\t\t\tset {$wpdb->postmeta}.meta_value = %s\n\t\t\t\t\t\twhere {$wpdb->postmeta}.post_id = %d\n\t\t\t\t\t\tand {$wpdb->postmeta}.meta_key = %s", array(maybe_serialize($meta), $image->ID, '_wp_attachment_metadata'));
$wpdb->query($update_query);
$results = array('success' => true, 'id' => $id, 'message' => sprintf(__('OK: %s', 'imsanity'), $oldPath));
} else {
$results = array('success' => false, 'id' => $id, 'message' => sprintf(__('ERROR: %s (%s)', 'imsanity'), $oldPath, htmlentities($resizeResult->get_error_message())));
}
} else {
$results = array('success' => true, 'id' => $id, 'message' => sprintf(__('SKIPPED: %s (Resize not required)', 'imsanity'), $oldPath));
}
} else {
$results = array('success' => false, 'id' => $id, 'message' => sprintf(__('ERROR: (Attachment with ID of %s not found) ', 'imsanity'), htmlentities($id)));
}
// if there is a quota we need to reset the directory size cache so it will re-calculate
delete_transient('dirsize_cache');
echo json_encode($results);
die;
// required by wordpress
}
/**
* If the uploaded image is a bmp this function handles the details of converting
* the bmp to a jpg, saves the new file and adjusts the params array as necessary
*
* @param array $params
*/
function imsanity_bmp_to_jpg($params)
{
// read in the bmp file and then save as a new jpg file.
// if successful, remove the original bmp and alter the return
// parameters to return the new jpg instead of the bmp
include_once 'libs/imagecreatefrombmp.php';
$bmp = imagecreatefrombmp($params['file']);
// we need to change the extension from .bmp to .jpg so we have to ensure it will be a unique filename
$uploads = wp_upload_dir();
$oldFileName = basename($params['file']);
$newFileName = basename(str_ireplace(".bmp", ".jpg", $oldFileName));
$newFileName = wp_unique_filename($uploads['path'], $newFileName);
$quality = imsanity_get_option('imsanity_quality', IMSANITY_DEFAULT_QUALITY);
if (imagejpeg($bmp, $uploads['path'] . '/' . $newFileName, $quality)) {
// conversion succeeded. remove the original bmp & remap the params
unlink($params['file']);
$params['file'] = $uploads['path'] . '/' . $newFileName;
$params['url'] = $uploads['url'] . '/' . $newFileName;
$params['type'] = 'image/jpeg';
} else {
unlink($params['file']);
return wp_handle_upload_error($oldPath, __("Oh Snap! Imsanity was Unable to process the BMP file. " . "If you continue to see this error you may need to disable the BMP-To-JPG " . "feature in Imsanity settings.", 'imsanity'));
}
return $params;
}
/**
* read in the image file from the params and then save as a new jpg file.
* if successful, remove the original image and alter the return
* parameters to return the new jpg instead of the original
*
* @param string 'bmp' or 'png'
* @param array $params
* @return array altered params
*/
function imsanity_convert_to_jpg($type, $params)
{
$img = null;
if ($type == 'bmp') {
include_once 'libs/imagecreatefrombmp.php';
$img = imagecreatefrombmp($params['file']);
} elseif ($type == 'png') {
if (!function_exists('imagecreatefrompng')) {
return wp_handle_upload_error($params['file'], 'imsanity_convert_to_jpg requires gd library enabled');
}
$img = imagecreatefrompng($params['file']);
} else {
return wp_handle_upload_error($params['file'], 'Unknown image type specified in imsanity_convert_to_jpg');
}
// we need to change the extension from the original to .jpg so we have to ensure it will be a unique filename
$uploads = wp_upload_dir();
$oldFileName = basename($params['file']);
$newFileName = basename(str_ireplace("." . $type, ".jpg", $oldFileName));
$newFileName = wp_unique_filename($uploads['path'], $newFileName);
$quality = imsanity_get_option('imsanity_quality', IMSANITY_DEFAULT_QUALITY);
if (imagejpeg($img, $uploads['path'] . '/' . $newFileName, $quality)) {
// conversion succeeded. remove the original bmp & remap the params
unlink($params['file']);
$params['file'] = $uploads['path'] . '/' . $newFileName;
$params['url'] = $uploads['url'] . '/' . $newFileName;
$params['type'] = 'image/jpeg';
} else {
unlink($params['file']);
return wp_handle_upload_error($oldPath, __("Oh Snap! Imsanity was Unable to process the {$type} file. " . "If you continue to see this error you may need to disable the {$type}-To-JPG " . "feature in Imsanity settings.", 'imsanity'));
}
return $params;
}
