A small script to help make graphic files for NightGFX, the OpenTTD graphic baseset

main.py currently automatically makes, from an 8bpp sprite

• 32bpp sprite with transparent backgrounds and desaturated company color 1 (cc1) & company color 2
• 8bpp mask files with palette, that replace cc1 with color index 202 and preserves following colors:
  • 232-238 Fire Cycle
  • 239-240 Flashing Red
  • 241-244 Flashing Yellow

main function is named process_image, set automatic_lights = True to have it automatically attempt to convert windows to lights and darken the image

dependencies: pillow, numpy

usage:

1. install Python on your computer
2. open your terminal
3. download pillow and numpy by running these commands
   • pip install pillow
   • pip install numpy
4. download the script main.py and move it to the folder where you have images
5. find the folder this script is located in and go to it in terminal with this command:
   • cd path/to/your/folder (replace path/to/your/folder with your folder)
6. run this script
   • python main.py
7. this script will ask you which image to process. Write the name of the file. Example:
   • infra06
   • infra06.png
   • make sure the image and the script are in the same folder
8. enjoy your new files
   • they will be at infra06--mask.png and infra06--32bpp.png if your file was infra06.png