1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/canvas/test/webgl-conformance/conformance/programs/gl-bind-attrib-location-test.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,201 @@
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>WebGL BindAttribLocation Conformance Tests</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 +</head>
1.18 +<body>
1.19 +<div id="description"></div>
1.20 +<div id="console"></div>
1.21 +<canvas style="border: 1px solid black;" id="canvas" width="50" height="50"></canvas>
1.22 +<script id="vshader" type="text/something-not-javascript">
1.23 +attribute vec4 vPosition;
1.24 +attribute vec4 vColor;
1.25 +varying vec4 color;
1.26 +void main()
1.27 +{
1.28 + gl_Position = vPosition;
1.29 + color = vColor;
1.30 +}
1.31 +</script>
1.32 +<script id="fshader" type="text/something-not-javascript">
1.33 +precision mediump float;
1.34 +
1.35 +varying vec4 color;
1.36 +void main()
1.37 +{
1.38 + gl_FragColor = color;
1.39 +}
1.40 +</script>
1.41 +<script>
1.42 +description("This test ensures WebGL implementations don't allow names that start with 'gl_' when calling bindAttribLocation.");
1.43 +
1.44 +debug("");
1.45 +debug("Canvas.getContext");
1.46 +
1.47 +var gl = create3DContext(document.getElementById("canvas"));
1.48 +shouldBeNonNull("gl");
1.49 +
1.50 +function fail(x,y, buf, shouldBe)
1.51 +{
1.52 + var i = (y*50+x) * 4;
1.53 + var reason = "pixel at ("+x+","+y+") is ("+buf[i]+","+buf[i+1]+","+buf[i+2]+","+buf[i+3]+"), should be "+shouldBe;
1.54 + testFailed(reason);
1.55 +}
1.56 +
1.57 +function pass()
1.58 +{
1.59 + testPassed("drawing is correct");
1.60 +}
1.61 +
1.62 +function loadShader(shaderType, shaderId) {
1.63 + // Get the shader source.
1.64 + var shaderSource = document.getElementById(shaderId).text;
1.65 +
1.66 + // Create the shader object
1.67 + var shader = gl.createShader(shaderType);
1.68 + if (shader == null) {
1.69 + debug("*** Error: unable to create shader '"+shaderId+"'");
1.70 + return null;
1.71 + }
1.72 +
1.73 + // Load the shader source
1.74 + gl.shaderSource(shader, shaderSource);
1.75 +
1.76 + // Compile the shader
1.77 + gl.compileShader(shader);
1.78 +
1.79 + // Check the compile status
1.80 + var compiled = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
1.81 + if (!compiled) {
1.82 + // Something went wrong during compilation; get the error
1.83 + var error = gl.getShaderInfoLog(shader);
1.84 + debug("*** Error compiling shader '"+shader+"':"+error);
1.85 + gl.deleteShader(shader);
1.86 + return null;
1.87 + }
1.88 + return shader;
1.89 +}
1.90 +
1.91 +debug("");
1.92 +debug("Checking gl.bindAttribLocation.");
1.93 +
1.94 +var program = gl.createProgram();
1.95 +gl.bindAttribLocation(program, 0, "gl_foo");
1.96 +glErrorShouldBe(gl, gl.INVALID_OPERATION,
1.97 + "bindAttribLocation should return INVALID_OPERATION if name starts with 'gl_'");
1.98 +gl.bindAttribLocation(program, 0, "gl_TexCoord0");
1.99 +glErrorShouldBe(gl, gl.INVALID_OPERATION,
1.100 + "bindAttribLocation should return INVALID_OPERATION if name starts with 'gl_'");
1.101 +
1.102 +var vs = loadShader(gl.VERTEX_SHADER, "vshader");
1.103 +var fs = loadShader(gl.FRAGMENT_SHADER, "fshader");
1.104 +gl.attachShader(program, vs);
1.105 +gl.attachShader(program, fs);
1.106 +
1.107 +var positions = gl.createBuffer();
1.108 +gl.bindBuffer(gl.ARRAY_BUFFER, positions);
1.109 +gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0.5,0 ]), gl.STATIC_DRAW);
1.110 +
1.111 +var colors = gl.createBuffer();
1.112 +gl.bindBuffer(gl.ARRAY_BUFFER, colors);
1.113 +gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
1.114 + 0,1,0,1,
1.115 + 0,1,0,1,
1.116 + 0,1,0,1]), gl.STATIC_DRAW);
1.117 +
1.118 +function setBindLocations(colorLocation, positionLocation) {
1.119 + gl.bindAttribLocation(program, positionLocation, "vPosition");
1.120 + gl.bindAttribLocation(program, colorLocation, "vColor");
1.121 + gl.linkProgram(program);
1.122 + gl.useProgram(program);
1.123 + var linked = (gl.getProgramParameter(program, gl.LINK_STATUS) != 0);
1.124 + assertMsg(linked, "program linked successfully");
1.125 +
1.126 + debug("vPosition:" + gl.getAttribLocation(program, "vPosition"))
1.127 + debug("vColor :" + gl.getAttribLocation(program, "vColor"))
1.128 + assertMsg(gl.getAttribLocation(program, "vPosition") == positionLocation,
1.129 + "location of vPosition should be " + positionLocation);
1.130 + assertMsg(gl.getAttribLocation(program, "vColor") == colorLocation,
1.131 + "location of vColor should be " + colorLocation);
1.132 +
1.133 + var ploc = gl.getAttribLocation(program, "vPosition");
1.134 + var cloc = gl.getAttribLocation(program, "vColor");
1.135 + gl.bindBuffer(gl.ARRAY_BUFFER, positions);
1.136 + gl.enableVertexAttribArray(positionLocation);
1.137 + gl.vertexAttribPointer(positionLocation, 3, gl.FLOAT, false, 0, 0);
1.138 + gl.bindBuffer(gl.ARRAY_BUFFER, colors);
1.139 + gl.enableVertexAttribArray(colorLocation);
1.140 + gl.vertexAttribPointer(colorLocation, 4, gl.FLOAT, false, 0, 0);
1.141 +}
1.142 +
1.143 +function checkDraw(colorLocation, positionLocation, r, g, b, a) {
1.144 + gl.clearColor(0, 0, 0, 1);
1.145 + gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
1.146 + gl.drawArrays(gl.TRIANGLES, 0, 3);
1.147 +
1.148 + var width = 50;
1.149 + var height = 50;
1.150 + var buf = new Uint8Array(width * height * 4);
1.151 + gl.readPixels(0, 0, width, height, gl.RGBA, gl.UNSIGNED_BYTE, buf);
1.152 +
1.153 + function checkPixel(x, y, r, g, b, a) {
1.154 + var offset = (y * width + x) * 4;
1.155 + if (buf[offset + 0] != r ||
1.156 + buf[offset + 1] != g ||
1.157 + buf[offset + 2] != b ||
1.158 + buf[offset + 3] != a) {
1.159 + fail(x, y, buf, "(" + r + "," + g + "," + b + "," + a + ")");
1.160 + return false;
1.161 + }
1.162 + return true;
1.163 + }
1.164 +
1.165 + // Test several locations
1.166 + // First line should be all black
1.167 + var success = true;
1.168 + for (var i = 0; i < 50; ++i)
1.169 + success = success && checkPixel(i, 0, 0, 0, 0, 255);
1.170 +
1.171 + // Line 15 should be red for at least 10 rgba pixels starting 20 pixels in
1.172 + var offset = (15 * 50 + 20) * 4;
1.173 + for (var i = 0; i < 10; ++i)
1.174 + success = success && checkPixel(20 + i, 15, r, g, b, a);
1.175 +
1.176 + // Last line should be all black
1.177 + for (var i = 0; i < 50; ++i)
1.178 + success = success && checkPixel(i, 49, 0, 0, 0, 255);
1.179 +
1.180 + if (success)
1.181 + pass();
1.182 +
1.183 + gl.disableVertexAttribArray(positionLocation);
1.184 + gl.disableVertexAttribArray(colorLocation);
1.185 +}
1.186 +
1.187 +setBindLocations(2, 3);
1.188 +checkDraw(2, 3, 0, 255, 0, 255);
1.189 +
1.190 +setBindLocations(0, 3);
1.191 +gl.disableVertexAttribArray(0);
1.192 +gl.vertexAttrib4f(0, 1, 0, 0, 1);
1.193 +checkDraw(0, 3, 255, 0, 0, 255);
1.194 +
1.195 +glErrorShouldBe(gl, gl.NO_ERROR);
1.196 +
1.197 +debug("");
1.198 +successfullyParsed = true;
1.199 +
1.200 +</script>
1.201 +<script>finishTest();</script>
1.202 +
1.203 +</body>
1.204 +</html>
