1.3 KiB
bmp2array4bit
bmp2array4bit.py reads a bmp file, and creates C (or C++) code that contains two arrays for adding images to four-bit sprites. See Sprite_image_4bit for an example.
It is loosely based on Spark Fun's bmp2array script, https://github.com/sparkfun/BMPtoArray/blob/master/bmp2array.py. The bmp file format is documented in https://en.wikipedia.org/wiki/BMP_file_format.
You'll need python 3.6 (the original uses Python 2.7)
usage: python bmp2array4bit.py [-v] star.bmp [-o myfile.c]
Create the bmp file in Gimp (www.gimp.org) from any image as follows:
- Remove the alpha channel (if it has one) Layer -> Transparency -> Remove Alpha Channel
- Set the mode to indexed. Image -> Mode -> Indexed...
- Select Generate optimum palette with 16 colors (max)
- Export the file with a .bmp extension. Do NOT select options:
- Run-Length Encoded
- Compatibility Options: "Do not write color space information"
- There are no Advanced Options available with these settings
(There are other tools that will produce bmp files, and these should work provided you don't use run-length encoding or other advanced features).
The first array produced is the palette for the image. The second is the image itself.