Image to ASCII Converter in C

This programme comverts a bitmap image to an ASCII art. It uses a C library that I wrote to read the bmp image data, then maps each pixel to an ASCII character. I have done a couple of iterations of this project, including an animated version. This project is nothing but a practice, and I am well aware of the fact that this could have been done in 2 minutes using p5.js or processing. I just tried to have fun doing this in extremely low level.

Examples

                   ..
          . .,,,,  -,
   ., -=- .,:,.,:- -.  .
      ~*=..:.    ~~~-,..
     ...,.-.      =*!!=;-.
    .. . ,:       :*!!!!*!:,
      :~..~,    .-=!!!!!!!**:
    .:-   .~    .,==;===!!!!*;
    ,~            ~=;;;;;=!!!*;
    ,.           .;=;;;;;;;=!!*:
    ,-          .~,~====;;;;=!!*-
     :,         ..  :*!!!=;;;=!!=.
     .:~            ,;=**!!;;;=!*-
    . .;. .         ,, ,~=*!=:;!*;
   ,,  ,:~.         -,   .:*!;;=!!.
   :... :,  ..     .: ..   :!!:;!*~
    ,:- -~  .~,   ,:,.      ;!;;!*:
    ,;:  ~-..-:-~~~, *:     ,*!:=*;
     ,.   -~:,.....  ..  ,.  =*;=*;
           ....,        .=:  ~!;;!;
     ..     .;:- .:;=!!!!!!- :!;;==,
       ..    -:.  ;!;:;::;!- :==;;=,
       .-         :!     .!- .!!!!:
                  ~!.    .!,  =!!!:
                  ,*,    ,!,..;!!!~
                  .!-    .!,::~!!!-
     ..         . .!;;=;::=;==;==!:
   .==;;;;;;;;;;=- =!=;=!!=!!!===!=.
    :!=========!=. ;!-.~~===!!====!-
    .!!!!!!!!!!!: ,~,-:--;;!!!====!,
    .=!!!!!!!!!!~ ::-=!=~,;!!!=====
     =!==!!!===!- :--!!!:,;=====;=;
     ;=;;=!!:;;!. :~-;!=-:;==!===!!~
     :=:;;;=;:;=,.-!-,~--:!=;=;;=!!!,
     .==;, ,===-...~:=~,!~-!====~;!!;
      ,:~   -:-     -:~~-  -~,:~ ..,,

                   ..,
                 .-~~-,.
               ,--,,,,,-..,
              ~:,.,..,,,,-~~
             ~~-,.......,,,~
            ~-,........ .,.,,
           .:,. .......  ...:.
           .~..-:;~-,,,,.  .:.
           -- ~!==;;:::~,..,:
           -,,!!;;;;;::::, ,-
           .~;!=;;::::::;~.,,
           -~;!!=;:;;;::;~.,,
           :~;=:~~~:~-,-~~-,,
           -~--. .,,.. ..-~.,
           .-~:,,.~~,,,,-:,..
            -;=;:-::,-~:~:-,.
            ,=;;~~;;-,~~~:-~
            .==-,~;:~,,~;:--
             ;;,,..,..,,:~,
             ~- .,,.,,..,,.
             ,..,,:::-,,.,.
             ...~~-~--~,..,.
              ..~;::~~-... ,
              . ,~-,--. ,, --
              -: ,,.,,..~-.:=~.
          ..,,!*. .,.. -:,,;;=:~~,
        ,;=;-~*;--  ..-:-,:;:::==;--.
       ~!!;~:!*~,=~,,-~~,-:::~::;;:==,
      ,*!;:;=!*: ~;~-~~,,~~::~~~-:;=;;~.
     .:!;:~!!**=..~~~-----~:~~:~~-;=::;;
    -=:!;~:!!*;~, -~~~~--~:;:::~~:=:;:~:
   ~*;;;~-:!*!;:~..-::--~~:;:::~~;;::,~~
  :!*;:;-,:!#=;=~~..;:--~~;;:::~~;:~-~;;
 ;=!=--;-,;!*::=:;~.:~~:~:=::;:~~:~~~~:;
:!!=---:~-;!;-~:;;:::,:=:;::::~,~:~~~-~;
==*;,--~-:==:,::::~~,-;:-~~~~---:~:~~-~;
;!=~-~,,-:;!:-::~::~-~;~-~~~~--:~-:~~-~:

Running the Code

This works only in Unix-like operating systems (WSL works). Compile the project with make, and run it:

$ make
$ ./a.out

You can change the image you wanna use in main.c. Why not use command line arguments? Too lazy.