1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/canvas/test/webgl-conformance/conformance/glsl/misc/glsl-function-nodes.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,139 @@
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>GLSL function nodes Test</title>
1.14 +<link rel="stylesheet" href="../../../resources/js-test-style.css"/>
1.15 +<link rel="stylesheet" href="../../resources/glsl-feature-tests.css"/>
1.16 +<script src="../../../resources/js-test-pre.js"></script>
1.17 +<script src="../../resources/webgl-test.js"> </script>
1.18 +<script src="../../resources/webgl-test-utils.js"> </script>
1.19 +
1.20 +<script id="vshaderFunction", type="x-shader/x-vertex">
1.21 +attribute vec4 aPosition;
1.22 +varying vec4 vColor;
1.23 +
1.24 +float sign_emu(float value) {
1.25 + if (value == 0.0) return 0.0;
1.26 + return value > 0.0 ? 1.0 : -1.0;
1.27 +}
1.28 +
1.29 +void main()
1.30 +{
1.31 + gl_Position = aPosition;
1.32 + vec2 texcoord = vec2(aPosition.xy * 0.5 + vec2(0.5, 0.5));
1.33 + vec4 color = vec4(
1.34 + texcoord,
1.35 + texcoord.x * texcoord.y,
1.36 + (1.0 - texcoord.x) * texcoord.y * 0.5 + 0.5);
1.37 + vColor = vec4(
1.38 + sign_emu(color.x * 2.0 - 1.0) * 0.5 + 0.5,
1.39 + sign_emu(color.y * 2.0 - 1.0) * 0.5 + 0.5,
1.40 + 0,
1.41 + 1);
1.42 +}
1.43 +</script>
1.44 +
1.45 +<script id="vshaderMacro", type="x-shader/x-vertex">
1.46 +attribute vec4 aPosition;
1.47 +varying vec4 vColor;
1.48 +
1.49 +#define sign_emu(value) ((value) == 0.0 ? 0.0 : ((value) > 0.0 ? 1.0 : -1.0))
1.50 +
1.51 +void main()
1.52 +{
1.53 + gl_Position = aPosition;
1.54 + vec2 texcoord = vec2(aPosition.xy * 0.5 + vec2(0.5, 0.5));
1.55 + vec4 color = vec4(
1.56 + texcoord,
1.57 + texcoord.x * texcoord.y,
1.58 + (1.0 - texcoord.x) * texcoord.y * 0.5 + 0.5);
1.59 + vColor = vec4(
1.60 + sign_emu(color.x * 2.0 - 1.0) * 0.5 + 0.5,
1.61 + sign_emu(color.y * 2.0 - 1.0) * 0.5 + 0.5,
1.62 + 0,
1.63 + 1);
1.64 +}
1.65 +</script>
1.66 +
1.67 +<script id="fshader", type="x-shader/x-fragment">
1.68 +#if defined(GL_ES)
1.69 +precision mediump float;
1.70 +#endif
1.71 +varying vec4 vColor;
1.72 +void main()
1.73 +{
1.74 + gl_FragColor = vColor;
1.75 +}
1.76 +</script>
1.77 +</head>
1.78 +<body>
1.79 +<canvas id="canvasFunction" width="50" height="50"></canvas>
1.80 +<canvas id="canvasMacro" width="50" height="50"></canvas>
1.81 +<div id="description">This tests against a Mac driver bug related to function calls.</div>
1.82 +<div id="console"></div>
1.83 +<script>
1.84 +var width = 50;
1.85 +var height = 50;
1.86 +
1.87 +function drawAndRead(canvasID, vshaderID, buffer)
1.88 +{
1.89 + var gl = initWebGL(canvasID, vshaderID, "fshader", ["aPosition"], [0, 0, 0, 1], 1);
1.90 + var vertexObject = gl.createBuffer();
1.91 + gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
1.92 + gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0.5,0 ]), gl.STATIC_DRAW);
1.93 + gl.enableVertexAttribArray(0);
1.94 + gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
1.95 +
1.96 + gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
1.97 + gl.drawArrays(gl.TRIANGLES, 0, 3);
1.98 + gl.readPixels(0, 0, width, height, gl.RGBA, gl.UNSIGNED_BYTE, buffer);
1.99 + if (gl.getError() != gl.NO_ERROR)
1.100 + return false;
1.101 + return true;
1.102 +}
1.103 +
1.104 +function compareRendering(buffer1, buffer2, tol)
1.105 +{
1.106 + for (var i = 0; i < width * height * 4; ++i) {
1.107 + if (Math.abs(buffer1[i] - buffer2[i]) > tol)
1.108 + return false;
1.109 + }
1.110 + return true;
1.111 +}
1.112 +
1.113 +function init()
1.114 +{
1.115 + if (window.initNonKhronosFramework) {
1.116 + window.initNonKhronosFramework(false);
1.117 + }
1.118 +
1.119 + description("tests function nodes");
1.120 +
1.121 + var bufFunction = new Uint8Array(width * height * 4);
1.122 + var bufMacro = new Uint8Array(width * height * 4);
1.123 +
1.124 + if (drawAndRead("canvasFunction", "vshaderFunction", bufFunction) == false ||
1.125 + drawAndRead("canvasMacro", "vshaderMacro", bufMacro) == false) {
1.126 + testFailed("Setup failed");
1.127 + } else {
1.128 + if (compareRendering(bufFunction, bufMacro, 4) == false)
1.129 + testFailedRender("Rendering results are different", bufMacro,
1.130 + bufFunction, width, height);
1.131 + else
1.132 + testPassed("Rendering results are the same");
1.133 + }
1.134 +}
1.135 +
1.136 +init();
1.137 +successfullyParsed = true;
1.138 +</script>
1.139 +<script>finishTest();</script>
1.140 +</body>
1.141 +</html>
1.142 +
