Handle drawing on to zero sized targets better

Fixes #125
jrmuizel · Apr 7, 2020 · ca35017 · ca35017
1 parent 0c810a0
commit ca35017
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diff --git a/src/draw_target.rs b/src/draw_target.rs
@@ -485,6 +485,12 @@ impl DrawTarget {
     }
 
     fn apply_path(&mut self, path: &Path) {
+
+        // we have no height so there can be no edges
+        if self.height == 0 {
+            return;
+        }
+
         for op in &path.ops {
             match *op {
                 PathOp::MoveTo(pt) => {

diff --git a/src/tests.rs b/src/tests.rs
@@ -756,4 +756,18 @@ mod tests {
         dt.set_transform(&dt.get_transform().pre_translate(euclid::vec2(0., 1.)));
         dt.fill_rect(0., -1., 100., 50., &img_src, &options);
     }
+
+    #[test]
+    fn zero_sized_draw_target() {
+        let mut dt = DrawTarget::new(0, 0);
+        let mut pb = PathBuilder::new();
+        pb.line_to(0.5, 0.5);
+        pb.line_to(2.0, -2.0);
+        pb.line_to(2.0, 0.5);
+        dt.fill(
+            &pb.finish(),
+            &WHITE_SOURCE,
+            &DrawOptions::new(),
+        );
+    }
 }