VG3_image_unload()Unload and free an image or all images.
void VG3_image_unload(void *wstruct, void *imgptr)
|imgptr||Image, or NULL = all images|
Unload and free an image. If the image was referenced more than one time with VG3_image_clone_reference() only the reference counter is decremented. If imgptr is NULL all images will be unloaded.