1 files changed, 89 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/attribs/gl-vertex-attrib-render.html b/dom/canvas/test/webgl-conf/checkout/conformance/attribs/gl-vertex-attrib-render.html
new file mode 100644
index 0000000000..b10ebfe688
--- /dev/null
+++ b/dom/canvas/test/webgl-conf/checkout/conformance/attribs/gl-vertex-attrib-render.html
@@ -0,0 +1,89 @@
+<!--
+Copyright (c) 2019 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">
+<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>
+<script id='vshader' type='x-shader'>
+attribute vec4 a;
+attribute vec2 p;
+void main() {
+  gl_Position = vec4(p.x + a.x + a.y + a.z + a.w, p.y, 0.0, 1.0);
+}
+</script>
+<script id='fshader' type='x-shader'>
+precision mediump float;
+void main() {
+  gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
+}
+</script>
+<script>
+"use strict";
+function checkRedPortion(gl, w, low, high) {
+  var buf = new Uint8Array(w * w * 4);
+  gl.readPixels(0, 0, w, w, gl.RGBA, gl.UNSIGNED_BYTE, buf);
+  var i = 0;
+  for (; i < w; ++i) {
+    if (buf[i * 4 + 0] == 255 && buf[i * 4 + 1] == 0 && buf[i * 4 + 2] == 0 && buf[i * 4 + 3] == 255) {
+      break;
+    }
+  }
+  return low <= i && i <= high;
+}
+
+function runTest() {
+  var wtu = WebGLTestUtils;
+  var gl = wtu.create3DContext('testbed', { preserveDrawingBuffer : true });
+  if (!gl) {
+    testFailed('could not create context');
+    return;
+  }
+  var program = wtu.setupProgram(gl, ['vshader', 'fshader'], ['p', 'a'])
+
+  gl.enableVertexAttribArray(gl.p);
+  var pos = gl.createBuffer();
+  pos.type = gl.FLOAT;
+  pos.size = 2;
+  pos.num = 4;
+  gl.bindBuffer(gl.ARRAY_BUFFER, pos);
+  gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([-1, -1, 1, -1, -1, 1, 1, 1]), gl.STATIC_DRAW);
+
+  gl.vertexAttribPointer(0, pos.size, pos.type, false, 0, 0);
+
+  debug('Test vertexAttrib[1..4]fv by setting different combinations that add up to 1.5 and use that when rendering.');
+  var vals = [[0.5], [0.1,0.4], [0.2,-0.2,0.5], [-1.0,0.3,0.2,2.0]];
+
+  for (var j = 0; j < 4; ++j) {
+    gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
+    gl['vertexAttrib' + (j+1) + 'fv'](1, vals[j]);
+    gl.drawArrays(gl.TRIANGLE_STRIP, 0, pos.num);
+
+    if (checkRedPortion(gl, 50, 50 * 0.7, 50 * 0.8)) {
+      testPassed('Attribute of size ' + (j+1) + ' was set correctly');
+    } else {
+      testFailed('Attribute of size ' + (j+1) + ' was not set correctly');
+    }
+  }
+}
+</script>
+</head>
+<body>
+<canvas id="testbed" width="50" height="50"></canvas>
+<div id="description"></div>
+<div id="console"></div>
+<script>
+"use strict";
+description('Verify that using constant attributes works.');
+runTest();
+var successfullyParsed = true;
+</script>
+<script src="../../js/js-test-post.js"></script>
+</body>
+</html>