    PNG.

:   PNGFile.writePNG(),  :

1.  Image
2. DataOutputStream,     
3. ,     : ,      ,    
4.  ,      ,  -1   
5.  ,   ProgressCallback,  null,       

 :

*     PNG  ,    
*     PNG ,   ,     
*       ~64,  heap      (128K + 41 * _) 

(C) SilentKnight