From 31f39660aa62d8e451f43bc32c994eba6e61e972 Mon Sep 17 00:00:00 2001
From: Tobias Wiese <tobias@tobiaswiese.com>
Date: Tue, 27 Jan 2026 00:31:06 +0100
Subject: svg: convert data matrix to svg

---
 Cargo.lock           |  9 ++++++++-
 Cargo.toml           | 10 +++++++++-
 examples/dmtx_svg.rs | 14 ++++++++++++++
 src/lib.rs           | 24 ++++++++++++++++++++++++
 4 files changed, 55 insertions(+), 2 deletions(-)
 create mode 100644 examples/dmtx_svg.rs

diff --git a/Cargo.lock b/Cargo.lock
index 0e54f58..f944d28 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,9 +4,10 @@ version = 4
 
 [[package]]
 name = "iec16022"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "libc",
+ "svg",
 ]
 
 [[package]]
@@ -14,3 +15,9 @@ name = "libc"
 version = "0.2.169"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "Could not get crate checksum"
+
+[[package]]
+name = "svg"
+version = "0.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "583e1c5c326fd6fede8797006de3b95ad6bcd60a592952952c5ba7ddd7e84c83"
diff --git a/Cargo.toml b/Cargo.toml
index c2fd8ba..618f995 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,8 +1,16 @@
 [package]
 name = "iec16022"
-version = "0.1.0"
+version = "0.2.0"
 edition = "2024"
 license = "GPL-3.0-or-later"
 
+[[example]]
+name = "dmtx_svg"
+required-features = ["svg"]
+
 [dependencies]
 libc = "0.2"
+svg = { version = "0.16", optional = true }
+
+[features]
+svg = ["dep:svg"]
diff --git a/examples/dmtx_svg.rs b/examples/dmtx_svg.rs
new file mode 100644
index 0000000..5a3915a
--- /dev/null
+++ b/examples/dmtx_svg.rs
@@ -0,0 +1,14 @@
+use iec16022::DataMatrix;
+use std::env::args_os;
+use std::os::unix::ffi::OsStringExt;
+
+fn main() {
+    let data = args_os()
+        .skip(1) // program name
+        .map(|arg| arg.into_vec())
+        .collect::<Vec<_>>()
+        .join(&b' ');
+    let dmtx = DataMatrix::encode(&data).unwrap();
+
+    print!("{}", dmtx.svg());
+}
diff --git a/src/lib.rs b/src/lib.rs
index ddb4405..e53ea75 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -108,6 +108,30 @@ impl DataMatrix {
         let idx = row * self.width + col;
         self.grid()[idx]
     }
+
+    #[cfg(feature = "svg")]
+    pub fn svg(&self) -> svg::Document {
+        use svg::node::element::Rectangle;
+
+        let mut svg = svg::Document::new()
+            // -1, -1 for quiet zone
+            // +2 for size of quiet zone
+            .set("viewBox", format!("-1 -1 {} {}", self.width() + 2, self.height() + 2));
+        for row in 0..self.height() {
+            for col in 0..self.width() {
+                if self.get(row, col) {
+                    svg = svg.add(
+                        Rectangle::new()
+                            .set("width", "1")
+                            .set("height", "1")
+                            .set("x", col)
+                            .set("y", self.height() - row - 1),
+                    );
+                }
+            }
+        }
+        svg
+    }
 }
 
 impl Drop for DataMatrix {
-- 
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