1 files changed, 41 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.negative.worker.js b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.negative.worker.js
new file mode 100644
index 0000000000..62929918ec
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.source.negative.worker.js
@@ -0,0 +1,41 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.get.source.negative
+// Description:getImageData() works with negative width and height, and returns top-to-bottom left-to-right
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("getImageData() works with negative width and height, and returns top-to-bottom left-to-right");
+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 = '#000';
+  ctx.fillRect(0, 0, 100, 50);
+  ctx.fillStyle = '#fff';
+  ctx.fillRect(20, 10, 60, 10);
+
+  var imgdata1 = ctx.getImageData(85, 25, -10, -10);
+  _assertSame(imgdata1.data[0], 255, "imgdata1.data[\""+(0)+"\"]", "255");
+  _assertSame(imgdata1.data[1], 255, "imgdata1.data[\""+(1)+"\"]", "255");
+  _assertSame(imgdata1.data[2], 255, "imgdata1.data[\""+(2)+"\"]", "255");
+  _assertSame(imgdata1.data[3], 255, "imgdata1.data[\""+(3)+"\"]", "255");
+  _assertSame(imgdata1.data[imgdata1.data.length-4+0], 0, "imgdata1.data[imgdata1.data.length-4+0]", "0");
+  _assertSame(imgdata1.data[imgdata1.data.length-4+1], 0, "imgdata1.data[imgdata1.data.length-4+1]", "0");
+  _assertSame(imgdata1.data[imgdata1.data.length-4+2], 0, "imgdata1.data[imgdata1.data.length-4+2]", "0");
+  _assertSame(imgdata1.data[imgdata1.data.length-4+3], 255, "imgdata1.data[imgdata1.data.length-4+3]", "255");
+
+  var imgdata2 = ctx.getImageData(0, 0, -1, -1);
+  _assertSame(imgdata2.data[0], 0, "imgdata2.data[\""+(0)+"\"]", "0");
+  _assertSame(imgdata2.data[1], 0, "imgdata2.data[\""+(1)+"\"]", "0");
+  _assertSame(imgdata2.data[2], 0, "imgdata2.data[\""+(2)+"\"]", "0");
+  _assertSame(imgdata2.data[3], 0, "imgdata2.data[\""+(3)+"\"]", "0");
+  t.done();
+});
+done();