Hello_Save_Selection.py

notice = """
   Save selected image region Demo
 -----------------------------------
| Copyright 2022 by Joel C. Alcarez |
| [joelalcarez1975@gmail.com]       |
|-----------------------------------|
|    We make absolutely no warranty |
| of any kind, expressed or implied |
|-----------------------------------|
|   This graphics library outputs   |
|   to a bitmap file.               |
 -----------------------------------
"""

from pythonbmp.BITMAPlib import(
        loadBMP,
        copyrect,
        convertselection2BMP as f,
        getfuncmetastr as meta,
        saveBMP
        )

import subprocess as proc
from os import path


def main():
        print(f'{notice}\n{meta(f)}')
        imgedt = 'mspaint'  # replace with another editor if Unix
        rootdir = path.dirname(__file__) # get path of this script
        bmp = loadBMP(f'{rootdir}/../assets/earth.bmp')
        buff = copyrect(bmp, 7, 7, 61, 61) # copy rectagular region (x1,y1,x2,y2) uint to buff
        nbmp = f(buff)# convert buffer to bitmap
        file = f'Hello{f.__name__}.bmp' #file name
        saveBMP(file, nbmp) # save file
        print('Saved to %s in %s\nAll done close %s to finish' % \
                (file, rootdir, imgedt)) # tell user we are done
        ret = proc.call([imgedt, file])

if __name__=="__main__":
        main()