/**
* 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
}
/**
* Handler after a file has been uploaded. If the file is an image, check the size
* to see if it is too big and, if so, resize and overwrite the original
* @param Array $params
*/
function imsanity_handle_upload($params)
{
/* debug logging... */
// file_put_contents ( "debug.txt" , print_r($params,1) . "\n" );
$option_convert_bmp = imsanity_get_option('imsanity_bmp_to_jpg', IMSANITY_DEFAULT_BMP_TO_JPG);
if ($params['type'] == 'image/bmp' && $option_convert_bmp) {
$params = imsanity_bmp_to_jpg($params);
}
// make sure this is a type of image that we want to convert and that it exists
// @TODO when uploads occur via RPC the image may not exist at this location
$oldPath = $params['file'];
if (!is_wp_error($params) && file_exists($oldPath) && in_array($params['type'], array('image/png', 'image/gif', 'image/jpeg'))) {
// figure out where the upload is coming from
$source = imsanity_get_source();
list($maxW, $maxH) = imsanity_get_max_width_height($source);
list($oldW, $oldH) = getimagesize($oldPath);
/* HACK: if getimagesize returns an incorrect value (sometimes due to bad EXIF data..?)
$img = imagecreatefromjpeg ($oldPath);
$oldW = imagesx ($img);
$oldH = imagesy ($img);
imagedestroy ($img);
//*/
/* HACK: an animated gif may have different frame sizes. to get the "screen" size
$data = ''; // TODO: convert file to binary
$header = unpack('@6/vwidth/vheight', $data );
$oldW = $header['width'];
$oldH = $header['width'];
//*/
if ($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);
// this is wordpress prior to 3.5 (image_resize deprecated as of 3.5)
$resizeResult = imsanity_image_resize($oldPath, $newW, $newH, false, null, null, $quality);
/* uncomment to debug error handling code: */
// $resizeResult = new WP_Error('invalid_image', __(print_r($_REQUEST)), $oldPath);
// regardless of success/fail we're going to remove the original upload
unlink($oldPath);
if (!is_wp_error($resizeResult)) {
$newPath = $resizeResult;
// remove original and replace with re-sized image
rename($newPath, $oldPath);
} else {
// resize didn't work, likely because the image processing libraries are missing
$params = wp_handle_upload_error($oldPath, sprintf(__("Oh Snap! Imsanity was unable to resize this image " . "for the following reason: '%s'\n\t\t\t\t\t. If you continue to see this error message, you may need to either install missing server" . " components or disable the Imsanity plugin." . " If you think you have discovered a bug, please report it on the Imsanity support forum.", 'imsanity'), $resizeResult->get_error_message()));
}
}
}
return $params;
}
/**
* Handler after a file has been uploaded. If the file is an image, check the size
* to see if it is too big and, if so, resize and overwrite the original
* @param Array $params
*/
function imsanity_handle_upload($params)
{
/* debug logging... */
// file_put_contents ( "debug.txt" , print_r($params,1) . "\n" );
// if "noresize" is included in the filename then we will bypass imsanity scaling
if (strpos($params['file'], 'noresize') !== false) {
return $params;
}
// if preferences specify so then we can convert an original bmp or png file into jpg
if ($params['type'] == 'image/bmp' && imsanity_get_option('imsanity_bmp_to_jpg', IMSANITY_DEFAULT_BMP_TO_JPG)) {
$params = imsanity_convert_to_jpg('bmp', $params);
}
if ($params['type'] == 'image/png' && imsanity_get_option('imsanity_png_to_jpg', IMSANITY_DEFAULT_PNG_TO_JPG)) {
$params = imsanity_convert_to_jpg('png', $params);
}
// make sure this is a type of image that we want to convert and that it exists
// @TODO when uploads occur via RPC the image may not exist at this location
$oldPath = $params['file'];
// @HACK not currently working
// @see https://wordpress.org/support/topic/images-dont-resize-when-uploaded-via-mobile-device
// if (!file_exists($oldPath)) {
// $ud = wp_upload_dir();
// $oldPath = $ud['path'] . DIRECTORY_SEPARATOR . $oldPath;
// }
if (!is_wp_error($params) && file_exists($oldPath) && in_array($params['type'], array('image/png', 'image/gif', 'image/jpeg'))) {
// figure out where the upload is coming from
$source = imsanity_get_source();
$quality = imsanity_get_option('imsanity_quality', IMSANITY_DEFAULT_QUALITY);
list($maxW, $maxH) = imsanity_get_max_width_height($source);
list($oldW, $oldH) = getimagesize($oldPath);
$oldFilesize = filesize($oldPath);
// estimated image quality algorithm from http://stackoverflow.com/a/19255481
$oldQuality = 101 - $oldW * $oldH * 3 / $oldFilesize;
/* HACK: if getimagesize returns an incorrect value (sometimes due to bad EXIF data..?)
$img = imagecreatefromjpeg ($oldPath);
$oldW = imagesx ($img);
$oldH = imagesy ($img);
imagedestroy ($img);
//*/
/* HACK: an animated gif may have different frame sizes. to get the "screen" size
$data = ''; // TODO: convert file to binary
$header = unpack('@6/vwidth/vheight', $data );
$oldW = $header['width'];
$oldH = $header['width'];
//*/
if ($oldW > $maxW && $maxW > 0 || $oldH > $maxH && $maxH > 0 || $params['type'] == 'image/jpeg' && imsanity_get_option('imsanity_enforce_quality', IMSANITY_DEFAULT_ENFORCE_QUALITY) && $oldQuality > $quality) {
list($newW, $newH) = wp_constrain_dimensions($oldW, $oldH, $maxW, $maxH);
// this is wordpress prior to 3.5 (image_resize deprecated as of 3.5)
$resizeResult = imsanity_image_resize($oldPath, $newW, $newH, false, null, null, $quality);
/* uncomment to debug error handling code: */
// $resizeResult = new WP_Error('invalid_image', __(print_r($_REQUEST)), $oldPath);
if (!is_wp_error($resizeResult)) {
$newPath = $resizeResult;
if (filesize($newPath) < filesize($oldPath)) {
// we saved some file space. remove original and replace with resized image
unlink($oldPath);
rename($newPath, $oldPath);
} else {
// theresized image is actually bigger in filesize (most likely due to jpg quality).
// keep the old one and just get rid of the resized image
unlink($newPath);
}
} else {
// resize didn't work, likely because the image processing libraries are missing
// remove the old image so we don't leave orphan files hanging around
unlink($oldPath);
$params = wp_handle_upload_error($oldPath, sprintf(__("Oh Snap! Imsanity was unable to resize this image " . "for the following reason: '%s'\n\t\t\t\t\t. If you continue to see this error message, you may need to either install missing server" . " components or disable the Imsanity plugin." . " If you think you have discovered a bug, please report it on the Imsanity support forum.", 'imsanity'), $resizeResult->get_error_message()));
}
}
}
return $params;
}
