**If you want to use 'flviewer' for LINUX, APPLE, MS-WINDOWS:**

01. Download the FLTK library from

      http://www.fltk.org

    e.g. fltk-1.3.x-r10813.tar.bz2
    and expand it.

02. For versions < r10813 MANUALLY uncomment in

      FL/Enumerations.H

    the line

//#define FL_ABI_VERSION 10304

    If you do not 

#define FL_ABI_VERSION 10304

    the horizontal BAR is not activated.

	For versions >= r10813, you can do:

	either: configure --abi-version=10304
	or    : cmake -DFL_ABI_VERSION:string="10304"

03. MS-WINDOWS may need in-source configuration/compilation.
	MS-WINDOWS out-source configuration/compilation may need 
	'-DOPTION_BUILD_EXAMPLES:bool=off'.

04. Compile the FLTK library. 

05. Install the FLTK library.

06. For FLVIEWER, CMAKE arguments for the OPENJPEG library may be:

      -DBUILD_SHARED_LIBS:bool=on
      -DBUILD_FLVIEWER:bool=on 
      -DBUILD_FLVIEWER_WITH_SHARED_LIBS:bool=on
      -DFLTK_SKIP_OPENGL:bool=on
      -DBUILD_WITH_GERMAN:bool=off

07. Compile the OPENJPEG library.

08. Call 'bin/flviewer --version'.

09. Call 'bin/flviewer' to test the application.

10. Some files with a large number of SOP markers, e.g. 

      'openjpeg-data/input/conformance/p0_07.j2k'

    with 256 tiles, may need some time. On my computer about 2 minutes.
    The SOP markers are therefore ON only on demand (read_jpeg2000.cxx).

11. The FLVIEWER menu has some buttons, inputs and outputs:

      Tracks, Frames, Threads                     : for MJ2
      Stop, Go on, Restart, Close, <-Step, Step-> : for MJ2, JPX, JPM
      Tile, Reduction and Area                    : for JP2/J2K, JPM, JPX
      Section and Browse                          : for all file types
      Layer and Component                         : for resp. files

      To use 'Section':
         Push the left mouse button and draw a rectangle
         Press 'Section'
         To remove the rectangle, click into the main window

      In the section window use the right mouse button to select an action.

      Only one section window can be open.

	  Use the right mouse button to close the section window.

      If you handle an animation of type MJ2 you must first press 
      the 'Stop' button to stop the movie before you can get a section.

12. Install the OPENJPEG library together with FLVIEWER.

13. JPM and JPX files can be found on:

      http://home.arcor.de

    or (possibly) on

      https://share.openanalytics.eu/data/public/76cb6a.php
      https://share.openanalytics.eu/data/public/1e7708.php