WordPress at a glance
filter is not described

image_editor_save_pre filter-hook . WP 3.5.0

Filters the WP_Image_Editor instance for the image to be streamed to the browser.

Usage

add_filter( 'image_editor_save_pre', 'filter_function_name_7035', 10, 2 );
function filter_function_name_7035( $image, $attachment_id ){
	// filter...

	return $image;
}
$image(WP_Image_Editor)
The image editor instance.
$attachment_id(int)
The attachment post ID.

Where the hook is called

wp_stream_image()
image_editor_save_pre
wp_save_image_file()
image_editor_save_pre
wp-admin/includes/image-edit.php 251
$image = apply_filters( 'image_editor_save_pre', $image, $attachment_id );
wp-admin/includes/image-edit.php 300
$image = apply_filters( 'image_editor_save_pre', $image, $post_id );

Where the hook is used (in WP core)

Does not used.