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0000000..9cf1062 --- /dev/null +++ b/LICENSE @@ -0,0 +1,19 @@ +MIT License + +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. diff --git a/README.md b/README.md new file mode 100644 index 0000000..40d228f --- /dev/null +++ b/README.md @@ -0,0 +1,16 @@ + +# pic2string 📸 + +generates ascii art from an image and outputs to stdout. + +## usage + +using the provided example image of walter the dog: +``` +pic2string ./walter.jpg +``` + +## todo + +- command line arg parsing for x-stretch and output dimensions instead of compile-time constants +- (maybe frame by frame video conversion if i'm bored?) diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..bd5fdd6 --- /dev/null +++ b/src/main.rs @@ -0,0 +1,39 @@ +use std::env; +use image::GenericImageView; + +const SYMBOLS: &[char] = &[' ', '.', ':', '-', '=', '+', '*', '#', '%', '@']; +const PIXEL_SIZE: f64 = 25.0; +const X_STRETCH: f64 = 2.0; + +fn main() -> Result<(), &'static str> { + let filename: String; + match env::args().into_iter().nth(1) { + None => return Err("No filename provided."), + Some(arg) => filename = arg, + } + + let img = image::open(filename).unwrap(); + let (w, h) = img.dimensions(); + + let a = u32::max(h, w) as f64 / PIXEL_SIZE; + let w = (w as f64 / a * X_STRETCH) as u32; + let h = (h as f64 / a) as u32; + + let resized = img.resize_exact(w, h, image::imageops::FilterType::Nearest); + + resized.pixels() + .map(|(_, _, color)| { + let sum: u16 = color.0.iter().take(3).map(|&v| v as u16).sum::(); + let normalized = sum as f64 / (3.0 * 255.0); + let idx = (normalized * SYMBOLS.len() as f64).round() as usize; + + SYMBOLS[idx] + }) + .collect::>() + .chunks(w as usize) + .for_each(|chunk| { + println!("{}", chunk.iter().collect::()) + }); + + Ok(()) +} diff --git a/walter.jpg b/walter.jpg new file mode 100644 index 0000000..1f53550 Binary files /dev/null and b/walter.jpg differ