pass progress callback to image layer read
pass progress callback to image layer read

seanisom/vtp,seanisom/vtp,seanisom/vtp,markraz/vtp,seanisom/vtp,nakijun/vtp,nakijun/vtp,markraz/vtp,markraz/vtp,seanisom/vtp,markraz/vtp,nakijun/vtp,nakijun/vtp,markraz/vtp,nakijun/vtp