The name of the file to identify.
Return location for the width of the image, or NULL. out
Return location for the height of the image, or NULL. out
A GdkPixbufFormat describing the image format of the file or NULL if the image format wasn't recognized. The return value is owned by GdkPixbuf and should not be freed. [transfer none]
Parses an image file far enough to determine its format and size. Since 2.4