adding qr node

Author: Sahil-Gupta584

Cargo.lock

@@ -239,6 +239,7 @@ spin = "0.10"
 clap = "4.5"
 spirv-std = { git = "https://github.com/Firestar99/rust-gpu-new", rev = "c12f216121820580731440ee79ebc7403d6ea04f", features = ["bytemuck"] }
 cargo-gpu = { git = "https://github.com/Firestar99/cargo-gpu", rev = "3952a22d16edbd38689f3a876e417899f21e1fe7", default-features = false }
+qrcodegen = "1.8"
 
 [workspace.lints.rust]
 unexpected_cfgs = { level = "allow", check-cfg = ['cfg(target_arch, values("spirv"))'] }

Cargo.toml

@@ -23,6 +23,7 @@ kurbo = { workspace = true }
 rand = { workspace = true }
 rustc-hash = { workspace = true }
 log = { workspace = true }
+qrcodegen = { workspace = true }
 
 # Optional workspace dependencies
 serde = { workspace = true, optional = true }

node-graph/nodes/vector/Cargo.toml

@@ -186,6 +186,33 @@ fn star<T: AsU64>(
 	Table::new_from_element(Vector::from_subpath(subpath::Subpath::new_star_polygon(DVec2::splat(-diameter), points, diameter, inner_diameter)))
 }
 
+/// Generates a QR code from the input text.
+#[node_macro::node(category("Vector: Shape"))]
+fn qr_code(_: impl Ctx, _primary: (), #[default("https://graphite.art")] text: String
+) -> Table<Vector> {
+	let ecc = qrcodegen::QrCodeEcc::Medium;
+
+	let Ok(qr_code) = qrcodegen::QrCode::encode_text(&text, ecc) else {
+		return Table::default();
+	};
+
+	let size = qr_code.size();
+	let mut vector = Vector::default();
+	let offset = DVec2::splat(size as f64 / -2.);
+
+	for y in 0..size {
+		for x in 0..size {
+			if qr_code.get_module(x, y) {
+				let corner1 = offset + DVec2::new(x as f64, y as f64);
+				let corner2 = corner1 + DVec2::splat(1.);
+				vector.append_subpath(subpath::Subpath::new_rect(corner1, corner2), false);
+			}
+		}
+	}
+
+	Table::new_from_element(vector)
+}
+
 /// Generates a line with endpoints at the two chosen coordinates.
 #[node_macro::node(category("Vector: Shape"))]
 fn line(
@@ -349,4 +376,11 @@ mod tests {
 			assert!([90., 150., 40.].into_iter().any(|target| (target - angle).abs() < 1e-10), "unexpected angle of {angle}")
 		}
 	}
+
+	#[test]
+	fn qr_code_test() {
+		let qr = qr_code((), (), "https://graphite.art".to_string());
+		assert!(qr.iter().next().unwrap().element.point_domain.ids().len() > 0);
+		assert!(qr.iter().next().unwrap().element.segment_domain.ids().len() > 0);
+	}
 }