From 3a2fef94230f35d948634ffef83660afdffa0bad Mon Sep 17 00:00:00 2001
From: Arjun Satarkar <me@arjunsatarkar.net>
Date: Thu, 1 Jun 2023 19:01:24 +0530
Subject: Complete libhitomezashi, reset project

---
 libhitomezashi/src/lib.rs | 63 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 libhitomezashi/src/lib.rs

(limited to 'libhitomezashi/src/lib.rs')

diff --git a/libhitomezashi/src/lib.rs b/libhitomezashi/src/lib.rs
new file mode 100644
index 0000000..b07057a
--- /dev/null
+++ b/libhitomezashi/src/lib.rs
@@ -0,0 +1,63 @@
+mod pixel_buffer;
+pub use bitvec::vec::BitVec;
+use pixel_buffer::PixelBuffer;
+
+pub fn get_hitomezashi_pattern(
+    x_pattern: BitVec,
+    y_pattern: BitVec,
+    gap: usize,
+    line_thickness: usize,
+) -> PixelBuffer {
+    let mut buf = PixelBuffer::new(x_pattern.len() * gap, y_pattern.len() * gap);
+    // Draw y pattern (horizontal) lines
+    for i in 0..y_pattern.len() {
+        for j in 0..x_pattern.len() {
+            if (j % 2 != 0) == y_pattern[i] {
+                let x = j * gap;
+                let y = i * gap;
+                let width = gap;
+                let height = line_thickness;
+                buf.fill_rect(x, y, width, height);
+            }
+        }
+    }
+    // Draw x pattern (vertical) lines
+    for i in 0..x_pattern.len() {
+        for j in 0..y_pattern.len() {
+            if (j % 2 != 0) == x_pattern[i] {
+                let x = i * gap;
+                let y = j * gap;
+                let width = line_thickness;
+                let height = gap;
+                buf.fill_rect(x, y, width, height)
+            }
+        }
+    }
+
+    // Join up the lines to avoid leaving holes at the intersections
+    // The best way to understand how this works is to try commenting it out
+    for x in (gap..buf.width).step_by(gap) {
+        for y in (gap..buf.height).step_by(gap) {
+            let width = line_thickness;
+            let height = line_thickness;
+            buf.fill_rect(x, y, width, height);
+        }
+    }
+    buf
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test() {
+        let mut x_pattern = BitVec::new();
+        x_pattern.resize(40, false);
+        x_pattern.set(1, true);
+        let mut y_pattern = BitVec::new();
+        y_pattern.resize(40, false);
+        y_pattern.set(1, true);
+        println!("{}", get_hitomezashi_pattern(x_pattern, y_pattern, 3, 1));
+    }
+}
-- 
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