rebased to use custom struct over String

src/ascii_manipulation.rs

@@ -1,50 +1,48 @@
 use std::process::exit;
 use image::{DynamicImage, GenericImageView, Rgba};
 use log::error;
+use crate::model_rgb_ascii::Ascii;
 
-//todo: consider how to take care of the a channel => do we want to render that as background?
 fn get_color(pixel: (u32, u32, Rgba<u8>)) -> u8 {
     let vec = pixel.2.0;
     //luminosity method of getting lightness
     (vec[0] as f32 * 0.3 + vec[1] as f32 * 0.59 + vec[2] as f32 * 0.11) as u8
 }
 
-fn to_ascii(char_map: String, image: DynamicImage) -> Vec<String> {
+fn to_ascii(char_map: String, image: DynamicImage) -> Vec<Vec<Ascii>> {
     let l = char_map.len() as f32;
-    let mut str = String::new();
-    let mut out: Vec<String> = Vec::new();
+    let mut str: Vec<Ascii> = Vec::new();
+    let mut out: Vec<Vec<Ascii>> = Vec::new();
 
     for pixel in image.pixels() {
         let ch = char_map.as_bytes()[((get_color(pixel) as f32-1.0)/255f32 * l) as usize];  //fixme: might break with non-ASCII char_map (ie braille chars, possibly)
-        str.push(char::from(ch));   //fixme: this is finicky and also very unsafe
+        str.push(Ascii::new(ch, pixel.2[0], pixel.2[1], pixel.2[2]));
 
         if pixel.0 == image.width()-1 {
             out.push(str);
-            str = String::new();
+            str = Vec::new();
         }
     }
     out
 }
 
-pub fn to_simple_ascii(image: DynamicImage) -> Vec<String> {
+pub fn to_simple_ascii(image: DynamicImage) -> Vec<Vec<Ascii>> {
     to_ascii(" .:-=+*#%@".to_owned(), image)
 }
 
-pub fn to_complex_ascii(image: DynamicImage) -> Vec<String> {
+pub fn to_complex_ascii(image: DynamicImage) -> Vec<Vec<Ascii>> {
     to_ascii(" .'`^\",:;Il!i><~+_-?][}{1)(|\\/tfjrxnuvczXYUJCLQ0OZmwqpdbkhao*#MW&8%B@$".to_owned(), image)
 }
 
-pub fn to_braille_ascii(image: DynamicImage) -> Vec<String> {
+pub fn to_braille_ascii(image: DynamicImage) -> Vec<Vec<Ascii>> {
     //todo: figure out braille symbols
-    vec!["not implemented".to_owned()]
+    vec![vec![Ascii::new(0, 0, 0, 0)]]
 }
 
-pub fn to_custom_ascii(char_map: String, image: DynamicImage) -> Vec<String> {
+pub fn to_custom_ascii(char_map: String, image: DynamicImage) -> Vec<Vec<Ascii>> {
     if char_map.is_empty() {
         error!("Custom map can not be empty!");
         exit(1);
     }
     to_ascii(char_map, image)
-}
-
-//todo: replace Vec<String> with a custom struct containing rgb information as well as character (for coloured output)
+}

src/main.rs

@@ -3,11 +3,13 @@ use crate::ascii_manipulation::*;
 use crate::cli::Cli;
 use crate::output::*;
 use crate::image_manipulation::*;
+use crate::model_rgb_ascii::Ascii;
 
 mod cli;
 mod image_manipulation;
 mod ascii_manipulation;
 mod output;
+mod model_rgb_ascii;
 
 //todo: general
 /* Documentation
@@ -28,7 +30,7 @@ fn main() {
     img = resize_image(img, cli.full, cli.width);
 
     //converting to ASCII
-    let out: Vec<String>;
+    let out: Vec<Vec<Ascii>>;
     if cli.braille {
         out = to_braille_ascii(img);
     } else if cli.complex {
@@ -45,11 +47,4 @@ fn main() {
     } else {
         print_terminal(out, cli.colour);
     }
-
-    //todo:
-    /* function that converts image to braille (if -b)
-     * something about printing in colour
-     * output to file
-     */
-
 }

src/model_rgb_ascii.rs

@@ -0,0 +1,29 @@
+
+pub struct RGB {
+    pub r: u8,
+    pub g: u8,
+    pub b: u8,
+}
+
+pub struct Ascii {
+    pub char: char,
+    pub rgb: RGB,
+}
+
+
+impl Ascii {
+    fn _new(char: char, r: u8, g: u8, b: u8) -> Self {
+        Ascii {
+            char,
+            rgb: RGB {
+                r,
+                g,
+                b,
+            },
+        }
+    }
+
+    pub fn new(ch: u8, r: u8, g: u8, b: u8) -> Self {
+        Self::_new(char::from(ch), r, g, b)
+    }
+}

src/output.rs

@@ -1,11 +1,16 @@
 use std::path::PathBuf;
+use crate::model_rgb_ascii::Ascii;
 
-pub fn print_terminal(ascii: Vec<String>, in_colour: bool) {
-    for line in ascii {
-        println!("{}", line);
+//todo: take into consideration the in_colour flag
+pub fn print_terminal(art: Vec<Vec<Ascii>>, in_colour: bool) {
+    for line in art {
+        for ascii in line {
+            print!("{}", ascii.char)
+        }
+        println!();
     }
 }
 
-pub fn print_file(ascii: Vec<String>, out: PathBuf) {
+pub fn print_file(ascii: Vec<Vec<Ascii>>, out: PathBuf) {
     //todo: this
 }