code:

---

...
ARGBbitmap_ptr = AllocBitmap(...)
...
If ARGBbitmap_ptr
  layerinfo_ptr = NewLayerInfo_
  If layerinfo_ptr
    layer_ptr    =  CreateUpfrontLayer_ (layerinfo_ptr,ARGBbitmap_ptr,0,0,img_width-1,img_height-1,0,0)
    If layer_ptr
      rastport_ptr = layer_ptrrp
    Else
      error {"image_init_rp: Unable to create upfront layer!"}
    End If
  Else
    error {"image_init_rp: Unable to allocate LayerInfo!"}
  End If
Else
   error {"image_init_rp: Unable to get ARGB bitmap!"}
End If

---