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b/Cargo.toml @@ -0,0 +1,10 @@ +[package] +name = "charify" +version = "0.1.0" +edition = "2021" + +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] +image = ">=0.24.1" +clap = ">=3.1.8" diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..cc80b0e --- /dev/null +++ b/LICENSE @@ -0,0 +1,16 @@ +Copyright (c) 2022 Kasyanov Nikolay Alexeyevich (Unbewohnte) +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. \ No newline at end of file diff --git a/README.md b/README.md new file mode 100644 index 0000000..d2cad5c --- /dev/null +++ b/README.md @@ -0,0 +1,28 @@ +# charify - a command line utility to convert an image to an array of characters + +## Usage + +`charify [OPTIONS] --image --destination ` + +where + +- `image` is the path to an existing image +- `destination` is the path to a newly created text file + +and + +OPTIONS: +- `-c, --charset ` + Set a new character set to use [default: "[' ', '░', '▒', '▓', '█']"] + +- `-h, --help` + Print help information + +- `-r, --new_dimensions ` + Resize source image to specified dimensions + +### Examples + +- `charify ~/wallpapers/image.png ~/wallpapers/my_wallpaper_but_in_text.txt` +- `charify image.jpg textfile.txt -r 500x450` +- `charify img.png charified.txt -c abcdefg` \ No newline at end of file diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..313d847 --- /dev/null +++ b/src/main.rs @@ -0,0 +1,196 @@ +/* +Copyright (c) 2022 Kasyanov Nikolay Alexeyevich (Unbewohnte) +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. +*/ + +use std::io::Write; +use std::process::exit; +use clap::Arg; + +/// returns a character from a character set that corresponds to given brightness +fn get_char(charset: &[char], brightness: &u8) -> char { + let charset_length = charset.len(); + return charset[((charset_length * *brightness as usize) as u32 / 256) as usize]; +} + +/// returns a complete character map where each character corresponds to brightness in an image point +fn charify(charset: &[char], brightness_map: &image::GrayImage) -> Vec { + let mut character_map: Vec = Vec::with_capacity(brightness_map.len()); + for point in brightness_map.iter() { + let character = get_char(charset, point); + character_map.push(character); + } + + return character_map; +} + + +fn main() { + let mut charset: Vec = vec![' ', '░', '▒', '▓', '█']; + + let matches = clap::Command::new("charify") + .version("0.1") + .author("Kasyanov Nikolay Alexeyevich (Unbewohnte)") + .arg( + Arg::new("image") + .help("Path to an existing image") + .takes_value(true) + .required(true) + .long("image") + .short('i') + .index(1) + ) + .arg( + Arg::new("destination") + .help("Path to a newly created text file") + .takes_value(true) + .required(true) + .long("destination") + .short('d') + .index(2) + ) + .arg( + Arg::new("new_dimensions") + .help("Resize source image to specified dimensions") + .takes_value(true) + .required(false) + .long("new_dimensions") + .short('r') + ) + .arg( + Arg::new("charset") + .help("Set a new character set to use") + .takes_value(true) + .required(false) + .long("charset") + .short('c') + .default_value(&*format!("{:?}", charset)) + ) + .get_matches(); + + // check source path + let source_image_path: &std::path::Path; + match matches.value_of("image") { + Some(path) => { + source_image_path = std::path::Path::new(path); + } + None => { + eprintln!("[ERROR] source image is not specified !"); + exit(1); + } + } + if !source_image_path.exists() { + eprintln!("[ERROR] \"{}\" does not exist", source_image_path.display()); + exit(1); + } else if !source_image_path.is_file() { + eprintln!("[ERROR] \"{}\" is not a file", source_image_path.display()); + } + + let mut source_image: image::GrayImage; + match image::open(source_image_path) { + Ok(img) => { + source_image = img.to_luma8(); + } + Err(e) => { + eprintln!("[ERROR] error opening a source image: {}", e); + exit(1); + } + } + + // check destination path + let destination_file_path: &std::path::Path; + match matches.value_of("destination") { + Some(path) => { + destination_file_path = std::path::Path::new(path); + } + None => { + eprintln!("[ERROR] destination path is not specified !"); + exit(1); + } + } + match destination_file_path.parent() { + Some(path) => { + match std::fs::create_dir_all(path) { + Ok(_) => {} + Err(e) => { + eprintln!("[ERROR] could not create \"{}\": {}", path.display(), e); + exit(1); + } + } + } + None => {} + } + + let mut destination_file; + match std::fs::File::create(destination_file_path) { + Ok(file) => { + destination_file = file; + } + Err(e) => { + eprintln!("[ERROR] could not create destination file: {}", e); + exit(1); + } + } + + // work with new dimensions if present + match matches.value_of("new_dimensions") { + Some(new_dimensions) => { + match new_dimensions.split_once('x') { + Some((nw_str, nh_str)) => { + let new_width: u32 = nw_str.parse::().unwrap(); + let new_height: u32 = nh_str.parse::().unwrap(); + + source_image = image::imageops::resize( + &source_image, new_width, new_height, + image::imageops::FilterType::Lanczos3); + } + None => {} + } + } + None => {} + } + + // define a new character set if given + match matches.value_of("charset") { + Some(new_charset) => { + charset.clear(); + for new_character in new_charset.chars() { + charset.push(new_character); + } + } + None => {} + } + + // convert an image to a character map + let character_map = charify(&charset, &source_image); + for y in 0..source_image.height() { + for x in 0..source_image.width() { + match write!(destination_file, "{}", character_map[(y * source_image.width() + x) as usize]) { + Ok(_) => {} + Err(e) => { + eprintln!("[ERROR] error writing to destination file: {}", e) + } + } + } + match write!(destination_file, "{}", "\n") { + Ok(_) => {} + Err(e) => { + eprintln!("[ERROR] error writing to destination file: {}", e) + } + } + } +}