Add test of toDataURL after compositing the WebGL canvas. (KhronosGro…

…up#3293) * Add test of toDataURL after compositing the WebGL canvas. Regression test for https://crbug.com/1216489 , where this path was broken in Chromium when using SwiftShader. Test passes in Firefox Nightly and Safari Technology Preview. * Add to test list
chcunningham · Jun 18, 2021 · baffa7f · baffa7f
1 parent 827cad9
commit baffa7f
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diff --git a/sdk/tests/conformance/canvas/00_test_list.txt b/sdk/tests/conformance/canvas/00_test_list.txt
@@ -13,6 +13,7 @@ drawingbuffer-test.html
 --min-version 1.0.4 render-after-resize-test.html
 --min-version 1.0.2 texture-bindings-unaffected-on-resize.html
 --min-version 1.0.2 to-data-url-test.html
+--min-version 1.0.4 to-data-url-after-composite.html
 viewport-unchanged-upon-resize.html
 --min-version 1.0.4 webgl-to-2d-canvas.html
 
diff --git a/sdk/tests/conformance/canvas/to-data-url-after-composite.html b/sdk/tests/conformance/canvas/to-data-url-after-composite.html
@@ -0,0 +1,51 @@
+<!--
+Copyright (c) 2021 The Khronos Group Inc.
+Use of this source code is governed by an MIT-style license that can be
+found in the LICENSE.txt file.
+-->
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>WebGL toDataURL after composite test</title>
+<link rel="stylesheet" href="../../resources/js-test-style.css"/>
+<script src="../../js/js-test-pre.js"></script>
+<script src="../../js/webgl-test-utils.js"> </script>
+</head>
+<body>
+<canvas width="20" height="20" style="border: 1px solid black; width: 128px; height: 128px" id="c3d"></canvas>
+<canvas width="20" height="20" style="border: 1px solid black; width: 128px; height: 128px" id="c2d"></canvas>
+<div id="description"></div>
+<div id="console"></div>
+<script type="application/javascript">
+const wtu = WebGLTestUtils;
+let gl;
+let ctx;
+
+function main() {
+  description();
+  const c2d = document.getElementById("c2d");
+  ctx = c2d.getContext("2d");
+  gl = wtu.create3DContext("c3d", { preserveDrawingBuffer: true });
+
+  // Clear to green
+  gl.clearColor(0.0, 1.0, 0.0, 1.0);
+  gl.clear(gl.COLOR_BUFFER_BIT);
+
+  wtu.waitForComposite(() => {
+    // Performs gl.canvas.toDataURL() internally
+    let img = wtu.makeImageFromCanvas(gl.canvas, function() {
+      ctx.drawImage(img, 0, 0);
+      wtu.checkCanvas(ctx, [0, 255, 0], "toDataURL loaded into image, drawn into 2D context, should be green", 5);
+      finishTest();
+    });
+  });
+
+};
+
+main();
+var successfullyParsed = true;
+</script>
+</body>
+</html>
+