Test that vertex attribute is preserved across context switches (Khro…

…nosGroup#2843) See http://crbug.com/920033 for rationale for this test.
chcunningham · Mar 30, 2019 · 291335b · 291335b
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diff --git a/sdk/tests/conformance/attribs/00_test_list.txt b/sdk/tests/conformance/attribs/00_test_list.txt
@@ -12,3 +12,4 @@ gl-vertexattribpointer-offsets.html
 --min-version 1.0.2 gl-vertex-attrib-render.html
 gl-vertex-attrib-zero-issues.html
 --min-version 1.0.4 gl-vertex-attrib-unconsumed-out-of-bounds.html
+--min-version 1.0.4 gl-vertex-attrib-context-switch.html
diff --git a/sdk/tests/conformance/attribs/gl-vertex-attrib-context-switch.html b/sdk/tests/conformance/attribs/gl-vertex-attrib-context-switch.html
@@ -0,0 +1,79 @@
+<!--
+/*
+** Copyright (c) 2019 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+-->
+
+<!DOCTYPE html>
+<html>
+  <head>
+<meta charset="utf-8">
+    <title>WebGL Vertex Attrib Context Switch 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 id="one" width="50" height="50">
+</canvas>
+<canvas id="two" width="50" height="50">
+</canvas>
+<div id="description"></div>
+<div id="console"></div>
+<script>
+"use strict";
+description("tests that vertex attrib value is preserved across context switches");
+var wtu = WebGLTestUtils;
+var positionLocation = 0;
+var colorLocation = 1;
+var gridRes = 1;
+
+var canvas1 = document.getElementById("one");
+var gl1 = wtu.create3DContext(canvas1);
+var program1 = wtu.setupSimpleVertexColorProgram(gl1, positionLocation, colorLocation);
+gl1.vertexAttrib4f(colorLocation, 0.0, 1.0, 0.0, 1.0);
+wtu.setupIndexedQuad(gl1, gridRes, positionLocation);
+wtu.clearAndDrawIndexedQuad(gl1, gridRes);
+wtu.checkCanvas(gl1, [0, 255, 0, 255], "should be green 1");
+
+var canvas2 = document.getElementById("two");
+var gl2 = wtu.create3DContext(canvas2);
+var program2 = wtu.setupSimpleVertexColorProgram(gl2, positionLocation, colorLocation);
+wtu.setupIndexedQuad(gl2, gridRes, positionLocation);
+wtu.clearAndDrawIndexedQuad(gl2, gridRes);
+wtu.checkCanvas(gl2, [0, 0, 0, 255], "should be black 1");
+
+wtu.checkCanvas(gl1, [0, 255, 0, 255], "should be green 2");
+
+wtu.clearAndDrawIndexedQuad(gl2, gridRes);
+wtu.checkCanvas(gl2, [0, 0, 0, 255], "should be black 2");
+
+wtu.clearAndDrawIndexedQuad(gl1, gridRes);
+wtu.checkCanvas(gl1, [0, 255, 0, 255], "should be green 3");
+
+var successfullyParsed = true;
+</script>
+<script src="../../js/js-test-post.js"></script>
+
+</body>
+</html>
+