From eecb04dcc4348af5fd9161c4ee92d59f23885924 Mon Sep 17 00:00:00 2001
From: Arjun Satarkar <me@arjunsatarkar.net>
Date: Fri, 2 Jun 2023 00:37:04 +0530
Subject: Add improved CLI (written in Rust)

---
 hitomezashi_cli/src/main.rs | 69 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 hitomezashi_cli/src/main.rs

(limited to 'hitomezashi_cli/src')

diff --git a/hitomezashi_cli/src/main.rs b/hitomezashi_cli/src/main.rs
new file mode 100644
index 0000000..3f27a72
--- /dev/null
+++ b/hitomezashi_cli/src/main.rs
@@ -0,0 +1,69 @@
+use bitvec::prelude::*;
+use clap::Parser;
+use libhitomezashi as hitomezashi;
+use std::process::ExitCode;
+
+#[derive(Parser, Debug)]
+#[command(author, version, about)]
+struct Args {
+    #[arg(short = 'x', long, value_parser = validate_xy_pattern)]
+    x_pattern: BitVec,
+    #[arg(short = 'y', long, value_parser = validate_xy_pattern)]
+    y_pattern: BitVec,
+    #[arg(short = 'g', long)]
+    gap: usize,
+    #[arg(short = 'l', long)]
+    line_thickness: usize,
+    #[arg(short = 'f', long, value_parser = parse_rgb_str)]
+    foreground_colour: image::Rgb<u8>,
+    #[arg(short = 'b', long, value_parser = parse_rgb_str)]
+    background_colour: image::Rgb<u8>,
+    #[arg(short = 'o', long)]
+    output_path: String,
+}
+
+fn validate_xy_pattern(pattern_raw: &str) -> Result<BitVec, String> {
+    let mut result = BitVec::new();
+    for ch in pattern_raw.chars() {
+        if ch == '1' {
+            result.push(true);
+        } else if ch == '0' {
+            result.push(false);
+        } else {
+            return Err(String::from("must consist of only 0 and 1"));
+        }
+    }
+    Ok(result)
+}
+
+fn parse_rgb_str(rgb_str: &str) -> Result<image::Rgb<u8>, String> {
+    let rgb: csscolorparser::Color = match csscolorparser::parse(rgb_str) {
+        Ok(rgb) => rgb,
+        Err(e) => return Err(e.to_string())
+    };
+    Ok(image::Rgb::from([(rgb.r * u8::MAX as f64) as u8, (rgb.g * u8::MAX as f64) as u8, (rgb.b * u8::MAX as f64) as u8]))
+}
+
+fn main() -> ExitCode {
+    let args = Args::parse();
+
+    let pattern = hitomezashi::get_hitomezashi_pattern(
+        args.x_pattern,
+        args.y_pattern,
+        args.gap,
+        args.line_thickness,
+    );
+    let mut image = image::RgbImage::new(pattern.width as u32, pattern.height as u32);
+    for x in 0..pattern.width {
+        for y in 0..pattern.height {
+            image.put_pixel(x as u32, y as u32, if pattern[x][y] {args.foreground_colour} else {args.background_colour})
+        }
+    }
+    match image.save_with_format(&args.output_path, image::ImageFormat::Png) {
+        Ok(_) => ExitCode::SUCCESS,
+        Err(e) => {
+            eprintln!("error: failed to save output image to {}: {}", args.output_path, e);
+            ExitCode::FAILURE
+        }
+    }
+}
-- 
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