├── .gitignore ├── Cargo.lock ├── Cargo.toml ├── LICENSE ├── README.md ├── assets ├── demo-google.gif └── demo.gif ├── images ├── cube.gif ├── github.png ├── google.png ├── test.gif └── test2.gif └── src ├── config.rs ├── engines ├── mod.rs └── term.rs ├── main.rs ├── renderer ├── animation.rs ├── mod.rs ├── static.rs └── traits.rs └── util ├── gif.rs ├── grayscale.rs ├── imgparse.rs ├── mod.rs └── size.rs /.gitignore: -------------------------------------------------------------------------------- 1 | # Generated by Cargo 2 | # will have compiled files and executables 3 | /target/ 4 | 5 | # These are backup files generated by rustfmt 6 | **/*.rs.bk 7 | 8 | /.vscode/ 9 | .rustfmt.toml 10 | node_modules 11 | /assets/*.rec.yml 12 | -------------------------------------------------------------------------------- /Cargo.lock: -------------------------------------------------------------------------------- 1 | # This file is automatically @generated by Cargo. 2 | # It is not intended for 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"0.3.1" 13 | data-encoding = "2.1.2" 14 | ring = "0.14.6" 15 | json = "0.11.14" 16 | regex = "1.1.7" 17 | 18 | [features] 19 | gif_codec = [] 20 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # i2a-rs 2 | Yet another Image to ASCII Art tool 3 | 4 | ## Highlights 5 | 6 | + **support for multiple formats** `i2a-rs` can render static as well as animated images 7 | + **responsive** `i2a-rs` automatically resizes images when terminal size changed 8 | + **efficient** `i2a-rs` calls FFmpeg to decode GIFs and caches rendered stuff for next time use 9 | 10 | ## Install 11 | 12 | Currently you can install by cloning the repo and build the binary: 13 | 14 | ```bash 15 | git clone https://github.com/hsfzxjy/i2a-rs/ 16 | cd i2a-rs 17 | cargo build --release 18 | # The release version has better performance while rendering GIFs 19 | ``` 20 | 21 | ### FFmpeg 22 | 23 | `i2a-rs` requires FFmpeg to decode GIFs, so make sure the command `ffmpeg` is available before rendering a GIF image. You may follow [this link](https://ffmpeg.org/download.html) to get it installed correctly. 24 | 25 | ## Usage 26 | 27 | Render a static image (JPEG, PNG, etc.) 28 | 29 | ```bash 30 | cargo run --release images/google.png 31 | ``` 32 | 33 | ![Google-Demo](./assets/demo-google.gif) 34 | 35 | 36 | Render a GIF image and play infinitely 37 | 38 | ```bash 39 | cargo run --release images/cube.gif 40 | ``` 41 | 42 | or just play for one cycle 43 | 44 | ```bash 45 | cargo run --release images/cube.gif --once 46 | ``` 47 | 48 | ![GIF-Demo](./assets/demo.gif) 49 | -------------------------------------------------------------------------------- /assets/demo-google.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hsfzxjy/i2a-rs/3d4bdb0be671269717fb7a9c20ebc67075bd723f/assets/demo-google.gif -------------------------------------------------------------------------------- /assets/demo.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hsfzxjy/i2a-rs/3d4bdb0be671269717fb7a9c20ebc67075bd723f/assets/demo.gif -------------------------------------------------------------------------------- /images/cube.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hsfzxjy/i2a-rs/3d4bdb0be671269717fb7a9c20ebc67075bd723f/images/cube.gif -------------------------------------------------------------------------------- /images/github.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hsfzxjy/i2a-rs/3d4bdb0be671269717fb7a9c20ebc67075bd723f/images/github.png -------------------------------------------------------------------------------- /images/google.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hsfzxjy/i2a-rs/3d4bdb0be671269717fb7a9c20ebc67075bd723f/images/google.png -------------------------------------------------------------------------------- /images/test.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hsfzxjy/i2a-rs/3d4bdb0be671269717fb7a9c20ebc67075bd723f/images/test.gif -------------------------------------------------------------------------------- /images/test2.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hsfzxjy/i2a-rs/3d4bdb0be671269717fb7a9c20ebc67075bd723f/images/test2.gif -------------------------------------------------------------------------------- /src/config.rs: -------------------------------------------------------------------------------- 1 | pub struct Config { 2 | pub padding: bool, 3 | pub dup: bool, 4 | pub once: bool, 5 | pub grayscale: bool, 6 | } 7 | -------------------------------------------------------------------------------- /src/engines/mod.rs: -------------------------------------------------------------------------------- 1 | mod term; 2 | 3 | pub use term::Terminal; 4 | -------------------------------------------------------------------------------- /src/engines/term.rs: -------------------------------------------------------------------------------- 1 | use super::super::config::Config; 2 | use super::super::renderer::{get_renderer, Renderer}; 3 | use std::io::Result; 4 | use std::path::Path; 5 | 6 | pub struct Terminal { 7 | renderer: Box, 8 | old_size: (usize, usize), 9 | } 10 | 11 | impl Terminal { 12 | pub fn new(path: &Path, once: bool) -> Terminal { 13 | Terminal { 14 | renderer: get_renderer( 15 | path, 16 | Config { 17 | padding: true, 18 | dup: true, 19 | grayscale: false, 20 | once: once, 21 | }, 22 | ), 23 | old_size: (0, 0), 24 | } 25 | } 26 | 27 | fn resize(&mut self, terminal: &crossterm::Terminal) -> Result<()> { 28 | let (width, height) = term_size::dimensions().unwrap(); 29 | 30 | if self.old_size == (width, height) { 31 | return Ok(()); 32 | } 33 | 34 | terminal.clear(crossterm::ClearType::All)?; 35 | println!("Parsing..."); 36 | 37 | self.old_size = (width, height); 38 | 39 | self.renderer.resize(width, height); 40 | Ok(()) 41 | } 42 | 43 | pub fn run(&mut self) -> Result<()> { 44 | if let Ok(_alternate) = crossterm::AlternateScreen::to_alternate(true) { 45 | let terminal = crossterm::Crossterm::new().terminal(); 46 | 47 | let mut sync_input = crossterm::input().read_async(); 48 | 49 | loop { 50 | if let Some(event) = sync_input.next() { 51 | match event { 52 | crossterm::InputEvent::Keyboard(crossterm::KeyEvent::Char('q')) => { 53 | break; 54 | } 55 | _ => (), 56 | } 57 | } 58 | 59 | self.resize(&terminal)?; 60 | terminal.clear(crossterm::ClearType::All)?; 61 | eprintln!("next"); 62 | if let Some((content, duration)) = self.renderer.next() { 63 | terminal.clear(crossterm::ClearType::All)?; 64 | print!("{}", content); 65 | std::thread::sleep(duration); 66 | } else { 67 | break; 68 | } 69 | } 70 | } 71 | Ok(()) 72 | } 73 | } 74 | -------------------------------------------------------------------------------- /src/main.rs: -------------------------------------------------------------------------------- 1 | #[macro_use] 2 | extern crate lazy_static; 3 | 4 | #[macro_use] 5 | extern crate json; 6 | 7 | extern crate clap; 8 | extern crate crossterm; 9 | extern crate image; 10 | 11 | mod config; 12 | mod engines; 13 | mod renderer; 14 | mod util; 15 | 16 | fn main() -> Result<(), std::boxed::Box> { 17 | let args = clap::App::new("i2a-rs") 18 | .author("hsfzxjy") 19 | .about("Show images in terminal using ASCII characters") 20 | .arg( 21 | clap::Arg::with_name("IMAGE") 22 | .help("The input image file") 23 | .required(true) 24 | .index(1), 25 | ) 26 | .arg( 27 | clap::Arg::with_name("once") 28 | .help("Play GIF for one cycle, and then exit.") 29 | .long("once") 30 | .takes_value(false), 31 | ) 32 | .get_matches(); 33 | 34 | let image_fn = args.value_of("IMAGE").unwrap(); 35 | engines::Terminal::new(std::path::Path::new(image_fn), args.is_present("once")).run()?; 36 | Ok(()) 37 | } 38 | -------------------------------------------------------------------------------- /src/renderer/animation.rs: -------------------------------------------------------------------------------- 1 | use super::super::config::Config; 2 | use super::traits::Renderer; 3 | use std::path::{Path, PathBuf}; 4 | use std::time::Duration; 5 | 6 | type Frame = String; 7 | 8 | pub struct AnimationRenderer { 9 | frames: Vec, 10 | config: Config, 11 | filename: PathBuf, 12 | duration: Duration, 13 | current_index: usize, 14 | } 15 | 16 | impl AnimationRenderer { 17 | pub fn new(path: &Path, config: Config) -> AnimationRenderer { 18 | AnimationRenderer { 19 | frames: Vec::new(), 20 | config: config, 21 | filename: path.to_path_buf(), 22 | duration: Duration::from_millis(100), 23 | current_index: 0, 24 | } 25 | } 26 | } 27 | 28 | impl Renderer for AnimationRenderer { 29 | fn next(&mut self) -> Option<(String, Duration)> { 30 | let result = (self.frames[self.current_index].to_owned(), self.duration); 31 | self.current_index = (self.current_index + 1) % self.frames.len(); 32 | 33 | if self.current_index == 0 && self.config.once { 34 | None 35 | } else { 36 | Some(result) 37 | } 38 | } 39 | fn resize(&mut self, width: usize, height: usize) { 40 | use super::super::util::Gif; 41 | let (frames, duration) = Gif::new(self.filename.as_path(), width, height, &self.config) 42 | .unwrap() 43 | .into_parse() 44 | .unwrap(); 45 | self.frames = frames; 46 | self.duration = duration; 47 | self.current_index = 0; 48 | } 49 | } 50 | -------------------------------------------------------------------------------- /src/renderer/mod.rs: -------------------------------------------------------------------------------- 1 | mod animation; 2 | mod r#static; 3 | mod traits; 4 | 5 | use super::config::Config; 6 | use animation::AnimationRenderer; 7 | use r#static::StaticRenderer; 8 | use std::boxed::Box; 9 | use std::path::Path; 10 | 11 | pub use traits::Renderer; 12 | 13 | pub fn get_renderer(path: &Path, config: Config) -> Box { 14 | let ext = path 15 | .extension() 16 | .and_then(|s| s.to_str()) 17 | .map_or("".to_string(), |s| s.to_ascii_lowercase()); 18 | 19 | match &ext[..] { 20 | "gif" => Box::new(AnimationRenderer::new(path, config)), 21 | _format => Box::new(StaticRenderer::new(path, config)), 22 | } 23 | } 24 | -------------------------------------------------------------------------------- /src/renderer/static.rs: -------------------------------------------------------------------------------- 1 | use super::super::config::Config; 2 | use super::super::util::img_to_ascii_color; 3 | use super::traits::Renderer; 4 | use image::DynamicImage; 5 | use std::path::Path; 6 | use std::time::Duration; 7 | 8 | pub struct StaticRenderer { 9 | img: DynamicImage, 10 | config: Config, 11 | cache: String, 12 | } 13 | 14 | impl StaticRenderer { 15 | pub fn new(path: &Path, config: Config) -> StaticRenderer { 16 | StaticRenderer { 17 | img: image::open(path).unwrap(), 18 | config: config, 19 | cache: String::new(), 20 | } 21 | } 22 | } 23 | 24 | impl Renderer for StaticRenderer { 25 | fn next(&mut self) -> Option<(String, Duration)> { 26 | Some((self.cache.to_owned(), Duration::from_millis(100))) 27 | } 28 | fn resize(&mut self, width: usize, height: usize) { 29 | self.cache = img_to_ascii_color(&self.img, height, width, &self.config); 30 | } 31 | } 32 | -------------------------------------------------------------------------------- /src/renderer/traits.rs: -------------------------------------------------------------------------------- 1 | use std::time::Duration; 2 | 3 | pub trait Renderer { 4 | fn next(&mut self) -> Option<(String, Duration)>; 5 | fn resize(&mut self, width: usize, height: usize); 6 | } -------------------------------------------------------------------------------- /src/util/gif.rs: -------------------------------------------------------------------------------- 1 | extern crate data_encoding; 2 | extern crate json; 3 | extern crate regex; 4 | 5 | use super::super::config::Config; 6 | use super::imgparse::img_to_ascii_color; 7 | use data_encoding::HEXUPPER; 8 | use ring::digest::{Context, SHA256}; 9 | use std::io::Read; 10 | use std::path::{Path, PathBuf}; 11 | use std::time::Duration; 12 | 13 | type Result = std::result::Result>; 14 | 15 | fn sha256_digest(path: &Path) -> Result { 16 | let mut reader = std::fs::File::open(path)?; 17 | let mut context = Context::new(&SHA256); 18 | let mut buffer = [0; 1024]; 19 | 20 | loop { 21 | let count = reader.read(&mut buffer)?; 22 | if count == 0 { 23 | break; 24 | } 25 | context.update(&buffer[..count]); 26 | } 27 | 28 | let result = HEXUPPER.encode(context.finish().as_ref()); 29 | Ok(result) 30 | } 31 | 32 | pub struct Gif<'a> { 33 | filename: PathBuf, 34 | dirname: PathBuf, 35 | width: usize, 36 | height: usize, 37 | config: &'a Config, 38 | } 39 | 40 | type GifParseResult = Result<(Vec, Duration)>; 41 | 42 | #[derive(Debug, Clone)] 43 | struct CacheReadError; 44 | 45 | impl std::fmt::Display for CacheReadError { 46 | fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result { 47 | write!(f, "Cannot parse cache file.") 48 | } 49 | } 50 | 51 | impl std::error::Error for CacheReadError { 52 | fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { 53 | None 54 | } 55 | } 56 | 57 | impl<'a> Gif<'a> { 58 | pub fn new( 59 | filename: &'a Path, 60 | width: usize, 61 | height: usize, 62 | config: &'a Config, 63 | ) -> Result> { 64 | Ok(Gif { 65 | filename: filename.to_path_buf(), 66 | dirname: get_cache_dirname(filename, width, height, config)?, 67 | width: width, 68 | height: height, 69 | config: config, 70 | }) 71 | } 72 | 73 | fn from_json(&self) -> GifParseResult { 74 | let content = std::fs::read_to_string(self.dirname.join("content.json"))?; 75 | if let Ok(data) = json::parse(content.as_str()) { 76 | let duration = data["duration"].as_u64().ok_or(CacheReadError)?; 77 | if let json::JsonValue::Array(caches) = &data["frames"] { 78 | let mut arr = Vec::new(); 79 | for value in caches.into_iter() { 80 | arr.push(String::from(value.as_str().ok_or(CacheReadError)?)) 81 | } 82 | Ok((arr, Duration::from_millis(duration))) 83 | } else { 84 | None.ok_or(CacheReadError)? 85 | } 86 | } else { 87 | None.ok_or(CacheReadError)? 88 | } 89 | } 90 | 91 | fn parse_ffmpeg_output(&self, output: &str) -> Result { 92 | let re = regex::Regex::new(r"frame=?\s*(\d+)").unwrap(); 93 | 94 | let frames = re 95 | .captures(&output) 96 | .unwrap() 97 | .get(1) 98 | .unwrap_or_else(|| panic!("Cannot read frames information from output.")) 99 | .as_str() 100 | .parse::()?; 101 | 102 | let re = regex::Regex::new(r"time=(\d{2}):(\d{2}):(\d{2}.\d{2})").unwrap(); 103 | let cap = re.captures(output).unwrap(); 104 | let hours = cap.get(1).unwrap().as_str().parse::()?; 105 | let minutes = cap.get(2).unwrap().as_str().parse::()?; 106 | let seconds = cap.get(3).unwrap().as_str().parse::()?; 107 | let total_msecs = 1000. * ((hours * 60. + minutes) * 60. + seconds); 108 | Ok((total_msecs / frames) as u64) 109 | } 110 | 111 | fn run_ffmpeg(&self) -> Result { 112 | let output = std::process::Command::new("ffmpeg") 113 | .args(&[ 114 | "-i", 115 | self.filename.to_str().unwrap(), 116 | "-vf", 117 | format!( 118 | "scale=w={}:h={}:force_original_aspect_ratio=decrease", 119 | self.width, self.height 120 | ) 121 | .as_str(), 122 | format!("{}/%05d.jpg", self.dirname.to_str().unwrap()).as_str(), 123 | ]) 124 | .output()?; 125 | 126 | if !output.status.success() { 127 | panic!( 128 | "`ffmpeg` did not exit successfully.\n{}", 129 | String::from_utf8_lossy(&output.stderr) 130 | ); 131 | } 132 | 133 | eprintln!("{}", String::from_utf8_lossy(&output.stderr)); 134 | 135 | self.parse_ffmpeg_output(&String::from_utf8_lossy(&output.stderr)) 136 | } 137 | 138 | fn get_frames_from_file(&self) -> Result> { 139 | let mut result = Vec::new(); 140 | for i in 1.. { 141 | let filename = self.dirname.join(format!("{:05}.jpg", i)); 142 | if let Ok(image) = image::open(filename) { 143 | result.push(img_to_ascii_color( 144 | &image, 145 | self.height, 146 | self.width, 147 | &self.config, 148 | )) 149 | } else { 150 | break; 151 | } 152 | } 153 | Ok(result) 154 | } 155 | 156 | fn save_cache(&self, frames: &Vec, duration: u64) -> Result<()> { 157 | let frames_json: Vec = frames 158 | .iter() 159 | .map(|s| json::JsonValue::String(s.to_owned())) 160 | .collect(); 161 | let data = object! { 162 | "duration" => duration, 163 | "frames" => frames_json, 164 | }; 165 | std::fs::write(self.dirname.join("content.json"), json::stringify(data))?; 166 | Ok(()) 167 | } 168 | 169 | fn use_ffmpeg(&self) -> GifParseResult { 170 | let msecs = self.run_ffmpeg()?; 171 | let duration = Duration::from_millis(msecs); 172 | let frames = self.get_frames_from_file()?; 173 | self.save_cache(&frames, msecs)?; 174 | Ok((frames, duration)) 175 | } 176 | 177 | pub fn into_parse(self) -> GifParseResult { 178 | if let Ok(result) = self.from_json() { 179 | return Ok(result); 180 | } 181 | 182 | self.use_ffmpeg() 183 | } 184 | } 185 | 186 | fn get_cache_dirname( 187 | filename: &Path, 188 | width: usize, 189 | height: usize, 190 | config: &Config, 191 | ) -> Result { 192 | let hash_value = sha256_digest(filename)?; 193 | let mut dirname = std::env::temp_dir(); 194 | dirname.push(format!("i2a-rs_{}", hash_value)); 195 | dirname.push(format!( 196 | "{}x{}x{}x{}", 197 | width, height, config.grayscale, config.dup 198 | )); 199 | 200 | if !dirname.exists() { 201 | std::fs::create_dir_all(&dirname)?; 202 | } 203 | 204 | Ok(dirname) 205 | } 206 | -------------------------------------------------------------------------------- /src/util/grayscale.rs: -------------------------------------------------------------------------------- 1 | lazy_static! { 2 | static ref GSCALE: Vec = { 3 | let tables = r#"$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\|()1{}[]?-_+~i!lI;:,"^` "#; 4 | let mut vec: Vec = tables.chars().collect(); 5 | vec.reverse(); 6 | vec 7 | }; 8 | static ref GSCALE_NUM: usize = GSCALE.len(); 9 | } 10 | 11 | pub fn grayscale_to_char(gs: f64) -> char { 12 | GSCALE[(gs * (*GSCALE_NUM - 1) as f64) as usize] 13 | } 14 | -------------------------------------------------------------------------------- /src/util/imgparse.rs: -------------------------------------------------------------------------------- 1 | use super::super::config::Config; 2 | use super::grayscale::grayscale_to_char; 3 | use super::size::adjust_size; 4 | use image::{DynamicImage, GenericImageView}; 5 | 6 | pub fn img_to_ascii_color( 7 | img: &DynamicImage, 8 | out_height: usize, 9 | out_width: usize, 10 | config: &Config, 11 | ) -> String { 12 | let mut s = String::new(); 13 | img_to_ascii( 14 | img, 15 | out_height, 16 | out_width, 17 | config.dup, 18 | config.padding, 19 | config.grayscale, 20 | |color, ch| { 21 | if ch == '\n' { 22 | return; 23 | } 24 | let colored = format!( 25 | "\x1b[38;2;{};{};{}m{}{}", 26 | color[0], 27 | color[1], 28 | color[2], 29 | ch, 30 | crossterm::Attribute::Reset, 31 | ); 32 | s.push_str(colored.as_str()); 33 | }, 34 | ); 35 | s 36 | } 37 | 38 | pub fn img_to_ascii( 39 | img: &DynamicImage, 40 | out_height: usize, 41 | out_width: usize, 42 | dup: bool, 43 | padding: bool, 44 | grayscale: bool, 45 | mut f: F, 46 | ) where 47 | F: FnMut([u8; 4], char) -> (), 48 | { 49 | let aspect_ratio = { 50 | let (w, h) = img.dimensions(); 51 | w as f64 / h as f64 52 | }; 53 | let (tb_width, tb_height, padding_x_l, padding_x_r, padding_y_l, padding_y_r) = adjust_size( 54 | aspect_ratio, 55 | out_width as usize, 56 | out_height as usize, 57 | dup, 58 | padding, 59 | ); 60 | 61 | let mut thumbnail = img.thumbnail_exact(tb_width as u32, tb_height as u32); 62 | 63 | for _ in 0..padding_y_l { 64 | for _ in 0..out_width { 65 | f([0; 4], ' '); 66 | } 67 | f([0; 4], '\n'); 68 | } 69 | if grayscale { 70 | thumbnail = thumbnail.grayscale(); 71 | } 72 | 73 | for (x, _y, pixel) in thumbnail.to_rgba().enumerate_pixels() { 74 | if x == 0 { 75 | for _ in 0..padding_x_l { 76 | f([0; 4], ' '); 77 | } 78 | } 79 | 80 | let ch = if grayscale { 81 | let cvalue = pixel[0] as f64 / 255.0; 82 | grayscale_to_char(cvalue) 83 | } else { 84 | // '■' 85 | '\u{2588}' 86 | }; 87 | 88 | f(pixel.data, ch); 89 | if dup { 90 | f(pixel.data, ch); 91 | } 92 | 93 | if x as usize == tb_width - 1 { 94 | for _ in 0..padding_x_r { 95 | f([0; 4], ' '); 96 | } 97 | f([0; 4], '\n'); 98 | } 99 | } 100 | for _ in 0..padding_y_r { 101 | for _ in 0..out_width { 102 | f([0; 4], ' '); 103 | } 104 | f([0; 4], '\n'); 105 | } 106 | } 107 | -------------------------------------------------------------------------------- /src/util/mod.rs: -------------------------------------------------------------------------------- 1 | mod gif; 2 | mod grayscale; 3 | mod imgparse; 4 | mod size; 5 | 6 | pub use gif::Gif; 7 | pub use imgparse::{img_to_ascii, img_to_ascii_color}; 8 | -------------------------------------------------------------------------------- /src/util/size.rs: -------------------------------------------------------------------------------- 1 | use std::f64; 2 | 3 | pub fn adjust_size( 4 | aspect_ratio: f64, 5 | w: usize, 6 | h: usize, 7 | dup: bool, 8 | padding: bool, 9 | ) -> (usize, usize, usize, usize, usize, usize) { 10 | let adjusted_w = if dup { w / 2 } else { w }; 11 | let tmp_w = (aspect_ratio * h as f64) as usize; 12 | let mut new_w = adjusted_w; 13 | let mut new_h = h; 14 | 15 | if tmp_w < adjusted_w { 16 | new_w = tmp_w; 17 | } else { 18 | new_h = (adjusted_w as f64 / aspect_ratio) as usize; 19 | }; 20 | let padding_x = if !padding { 21 | 0 22 | } else if dup { 23 | (w - new_w * 2) / 2 24 | } else { 25 | (w - new_w) / 2 26 | }; 27 | let padding_x_r = if dup { 28 | w - new_w * 2 - padding_x 29 | } else { 30 | w - new_w - padding_x 31 | }; 32 | let padding_y = if !padding { 0 } else { (h - new_h) / 2 }; 33 | ( 34 | new_w, 35 | new_h, 36 | padding_x, 37 | padding_x_r, 38 | padding_y, 39 | h - new_h - padding_y, 40 | ) 41 | } 42 | --------------------------------------------------------------------------------