• c44 - is one of several DJVU encoders from opensource DjVuLibre project
• fi_c44 - is a fork of c44 made by monday2000. "fi_" stands for FreeImage - the library that allows to perform operations with images in most popular formats. Original c44 could read only images in PNM/PBM/PGM or JPEG. With help of FreeImage fi_c44 can read images in PNG or TIFF, etc. fi_44 is used in DjVu Imager tool written by monday2000.
• c44-fi - is a renamed version of fi_c44, adapted for Linux.

Unfortunately, although c44 was crossplatform, the fi_44 was designed for Windows only. Some windows-specific code was used in it and it lacks of build tools.

I've decided to adapt it a little to make more crossplatform:

• The Windows specific code was replaced.
• Some project files were added to make it a standalone CMake project.
• The original c44.cpp file was updated with an up-to-date copy to be able to compile with latest DjVuLibre.
• The project is renamed to avoid "_" character usage in package names. Also I hope it'll be easy to remember.

Now encoder could be build for Linux. I've also ported DjVu Imager tool to Qt to build it natively for Linux. DjVu Imager Qt is using c44-fi.

1. Clone the project with djvulibre as a submodule (note --recursive parameter):

      git clone --recursive https://github.com/trufanov-nok/c44-freeimage.git
      cd c44-freeimage

2. Install the dependencies: sudo apt-get install libfreeimage-dev
3. Build the project:

      mkdir build
      cd build
      cmake ..
      make

4. To test - run ./c44-fi from the build subfolder