1 files changed, 78 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.round.html b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.round.html
new file mode 100644
index 0000000000..70f6a8e517
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/line-styles/2d.line.join.round.html
@@ -0,0 +1,78 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>OffscreenCanvas test: 2d.line.join.round</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/html/canvas/resources/canvas-tests.js"></script>
+
+<h1>2d.line.join.round</h1>
+<p class="desc">lineJoin 'round' is rendered correctly</p>
+
+
+<script>
+var t = async_test("lineJoin 'round' is rendered correctly");
+var t_pass = t.done.bind(t);
+var t_fail = t.step_func(function(reason) {
+    throw reason;
+});
+t.step(function() {
+
+  var canvas = new OffscreenCanvas(100, 50);
+  var ctx = canvas.getContext('2d');
+
+  ctx.fillStyle = '#0f0';
+  ctx.fillRect(0, 0, 100, 50);
+
+  var tol = 1; // tolerance to avoid antialiasing artifacts
+
+  ctx.lineJoin = 'round';
+  ctx.lineWidth = 20;
+
+  ctx.fillStyle = '#f00';
+  ctx.strokeStyle = '#0f0';
+
+  ctx.fillRect(10, 10, 20, 20);
+  ctx.fillRect(20, 20, 20, 20);
+  ctx.beginPath();
+  ctx.moveTo(30, 20);
+  ctx.arc(30, 20, 10-tol, 0, 2*Math.PI, true);
+  ctx.fill();
+
+  ctx.beginPath();
+  ctx.moveTo(10, 20);
+  ctx.lineTo(30, 20);
+  ctx.lineTo(30, 40);
+  ctx.stroke();
+
+
+  ctx.fillStyle = '#0f0';
+  ctx.strokeStyle = '#f00';
+
+  ctx.beginPath();
+  ctx.moveTo(60, 20);
+  ctx.lineTo(80, 20);
+  ctx.lineTo(80, 40);
+  ctx.stroke();
+
+  ctx.fillRect(60, 10, 20, 20);
+  ctx.fillRect(70, 20, 20, 20);
+  ctx.beginPath();
+  ctx.moveTo(80, 20);
+  ctx.arc(80, 20, 10+tol, 0, 2*Math.PI, true);
+  ctx.fill();
+
+  _assertPixel(canvas, 36,14, 0,255,0,255);
+  _assertPixel(canvas, 36,13, 0,255,0,255);
+  _assertPixel(canvas, 37,13, 0,255,0,255);
+  _assertPixel(canvas, 38,13, 0,255,0,255);
+  _assertPixel(canvas, 38,12, 0,255,0,255);
+
+  _assertPixel(canvas, 86,14, 0,255,0,255);
+  _assertPixel(canvas, 86,13, 0,255,0,255);
+  _assertPixel(canvas, 87,13, 0,255,0,255);
+  _assertPixel(canvas, 88,13, 0,255,0,255);
+  _assertPixel(canvas, 88,12, 0,255,0,255);
+  t.done();
+
+});
+</script>