feat: 顶层 API + PNG/SVG/ASCII 渲染器

2026-06-16 23:51:55 +08:00
parent 778b0ee1fa
commit 41ef43f038
4 changed files with 299 additions and 4 deletions
@@ -1 +1,32 @@
-// FIXME: SVG 渲染器 — Task 10
+use crate::qr::QrCode;
+
+pub fn render_svg(qr: &QrCode) -> String {
+    let matrix_size = qr.size() as u32;
+    let margin = qr.margin as u32;
+    let total = matrix_size + 2 * margin;
+
+    let mut svg = String::new();
+    svg.push_str(&format!(
+        r#"<svg xmlns="http://www.w3.org/2000/svg" width="{}" height="{}" viewBox="0 0 {} {}">"#,
+        total, total, total, total
+    ));
+    svg.push_str(&format!(
+        r#"<rect width="{}" height="{}" fill="white"/>"#,
+        total, total
+    ));
+
+    for y in 0..matrix_size {
+        for x in 0..matrix_size {
+            if qr.modules()[y as usize][x as usize] {
+                svg.push_str(&format!(
+                    r#"<rect x="{}" y="{}" width="1" height="1" fill="black"/>"#,
+                    x + margin,
+                    y + margin
+                ));
+            }
+        }
+    }
+
+    svg.push_str("</svg>");
+    svg
+}