1. A method for texture image management, performed by a 3D graphics engine, comprising: receiving information from an application, indicating that a texture image is stored in a first region of a memory device; determining whether the first region of the memory device is a read-only (RO) region or a read-write (RW) region; and generating an RO attribute corresponding to the indicated texture image to indicate that the texture image is stored in the RO region when determining that the first region of the memory device is the RO region, thereby enabling the texture image retrieved from the first region to be applied to a fragment.