22. Image tobitmap

See: https://pillow.readthedocs.io/en/stable/reference/Image.html#PIL.Image.Image.tobitmap

See: https://wiki.multimedia.cx/index.php/XBM

See: https://www.tau.ac.il/images/desc/Images.html

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22.1. Tobitmap

Use the Image.tobitmap(name='image') to return the mode 1 image converted to an X11 bitmap.

name - The name prefix to use for the bitmap variables.

It returns a string containing an X11 bitmap.

from PIL import Image
from io import BytesIO


im_L = Image.frombytes("L", (8, 8), b'''\
\xff\xff\xff\xff\xff\xff\xff\xff\
\xff\xff\x00\x00\x00\x00\xff\xff\
\xff\x00\xff\x00\x00\xff\x00\xff\
\xff\x00\x00\xff\xff\x00\x00\xff\
\xff\x00\x00\xff\xff\x00\x00\xff\
\xff\x00\xff\x00\x00\xff\x00\xff\
\xff\xff\x00\x00\x00\x00\xff\xff\
\xff\xff\xff\xff\xff\xff\xff\xff\
''')
im_L = im_L.convert("1")
im_xbm = im_L.tobitmap("xshape")  # "xbm" format (X11 bitmap)
print(im_xbm.decode('ascii'))

'''
#define xshape_width 8
#define xshape_height 8
static char xshape_bits[] = {
0xff,0xc3,0xa5,0x99,0x99,0xa5,0xc3,0xff
};
'''

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