sl1toctb - convert prusaslicer files to ctb v4 files

Note to Github users : development is happening on Gitlab, please go there for issues and pull requests.

sl1toctb allows to convert files created by the prusaslicer 3d slicer into chitu's ctb file, version 4, to use with any 3d printer supporting those files.

Note that it will output ctb file version 4, not any earlier.

Usage

sl1toctb [-h] [--help] <input sl1 file> [<output ctb file>] 
sl1toctb <-i> <ctb file> 
sl1toctb <-l|-s|-e> <dir> <ctb file> 
  
Convert a sl1 file into a ctb v4 file. 
Output file will have the same name as input file with the 
.sl1 extension replaced with .ctb, unless `output ctb file` is 
specified. 

When `-i` option is provided, inspect the given file instead.
This works with both ctb files and sl1 files.

When `-l` or `-s` option is provided, export preview image instead.
`-l` exports the large preview, and `-s` exports the small preview.
The file will be saved in `dir` and will be named `preview.png`.
Only works for ctb files.

When -e option is provided, export layers and their headers in `dir`.
Only works for ctb files.

Options: 

-i        : inspect file. (ctb or sl1) 
-l        : export large preview. (ctb only) 
-s        : export small preview. (ctb only) 
-e        : export layer data to <dir> (ctb only) 
-h|--help : show this help 

Build

sl1toctb depends on:

• libzip
• zlib
• pkg-config
• make
• gcc

To build and install the software:

make
make install

It will install program sl1toctb in /usr/local/bin by default.

To install in an other directory, pass the PREFIX value directly to make:

make
make install PREFIX=/other/directory/

Credits

UVtools has been instrumental to my understanding of the ctb file format, some parts of sl1toctb (notably the RLE encoding/decoding and the encrypting/decrypting algorithms) are basically line by line translations from UVtools. Thanks a lot to them! If you want a multi-format, many features, actively developed tool, they're the ones.

Thanks a lot also to catibo's developer, who did the initial reverse engineering of the ctb format (version 2) and took the time to properly document it. You rock.

License

sl1toctb contains a copy of libspng, which is dual licensed as BSD-2-Clause AND libpng-2.0. The rest of the code is public domain.