Function gltforge_image_bytes 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn gltforge_image_bytes(
    ptr: *const UnityGltf,
    image_idx: u32,
    out_len: *mut u32,
) -> *const u8

Return a pointer to the raw encoded image bytes (PNG, JPEG, …) for a buffer-view-embedded image. out_len receives the byte count. Returns null if image_idx is out of range or the image is URI-based.

Safety

ptr must be a valid, non-null handle. out_len may be null. The returned pointer is valid for the lifetime of the UnityGltf handle.