1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/canvas/test/webgl-conformance/conformance/glsl/variables/gl-frontfacing.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,88 @@
1.4 +<!--
1.5 +Copyright (c) 2011 The Chromium Authors. All rights reserved.
1.6 +Use of this source code is governed by a BSD-style license that can be
1.7 +found in the LICENSE file.
1.8 + -->
1.9 +<!DOCTYPE html>
1.10 +<html>
1.11 +<head>
1.12 +<meta charset="utf-8">
1.13 + <title>gl-fragcoord Test</title>
1.14 + <link rel="stylesheet" href="../../../resources/js-test-style.css"/>
1.15 + <script src="../../../resources/js-test-pre.js"></script>
1.16 + <script src="../../resources/webgl-test.js"> </script>
1.17 + <script src="../../resources/webgl-test-utils.js"> </script>
1.18 +</head>
1.19 +<body>
1.20 +<canvas id="example" width="32" height="32">
1.21 +</canvas>
1.22 +<div id="description"></div>
1.23 +<div id="console"></div>
1.24 + <script id="vshader" type="x-shader/x-vertex">
1.25 + attribute vec4 vPosition;
1.26 + void main()
1.27 + {
1.28 + gl_Position = vPosition;
1.29 + }
1.30 + </script>
1.31 +
1.32 + <script id="fshader" type="x-shader/x-fragment">
1.33 + precision mediump float;
1.34 + void main()
1.35 + {
1.36 + gl_FragColor = vec4(
1.37 + gl_FrontFacing ? 1.0 : 0.0,
1.38 + gl_FrontFacing ? 0.0 : 1.0,
1.39 + 0,
1.40 + 1);
1.41 + }
1.42 + </script>
1.43 +
1.44 + <script>
1.45 + function init()
1.46 + {
1.47 + if (window.initNonKhronosFramework) {
1.48 + window.initNonKhronosFramework(false);
1.49 + }
1.50 +
1.51 + description("tests gl_FrontFacing");
1.52 +
1.53 + wtu = WebGLTestUtils;
1.54 + gl = initWebGL("example", "vshader", "fshader", [ "vPosition"], [ 0, 0, 0, 1 ], 1);
1.55 +
1.56 + var gridRes = 4;
1.57 + wtu.setupQuad(gl, gridRes, 0, true);
1.58 +
1.59 + gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
1.60 + gl.drawElements(gl.TRIANGLES, gridRes * gridRes * 6, gl.UNSIGNED_SHORT, 0);
1.61 + wtu.glErrorShouldBe(gl, gl.NO_ERROR, "no errors from draw");
1.62 +
1.63 + var step = 32 / gridRes;
1.64 + var halfStep = step / 2;
1.65 + var quarterStep = halfStep / 2;
1.66 + for (var xx = 0; xx < 32; xx += step) {
1.67 + for (var yy = 0; yy < 32; yy += step) {
1.68 + for (var ii = 0; ii < 2; ++ii) {
1.69 + var color = [
1.70 + ii == 0 ? 255 : 0,
1.71 + ii == 0 ? 0 : 255,
1.72 + 0
1.73 + ];
1.74 + var msg = "should be " + color;
1.75 + wtu.checkCanvasRect(
1.76 + gl,
1.77 + xx + quarterStep + halfStep * ii,
1.78 + yy + quarterStep + halfStep * ii,
1.79 + 1, 1, color, msg, 4);
1.80 + }
1.81 + }
1.82 + }
1.83 + }
1.84 +
1.85 + init();
1.86 + successfullyParsed = true;
1.87 + </script>
1.88 +<script>finishTest();</script>
1.89 +
1.90 +</body>
1.91 +</html>
