dom/canvas/test/webgl-conf/checkout/conformance/programs/gl-bind-attrib-location-test.html

   1 <!--
   2 Copyright (c) 2019 The Khronos Group Inc.
   3 Use of this source code is governed by an MIT-style license that can be
   4 found in the LICENSE.txt file.
   5 -->
   6
   7 <!DOCTYPE html>
   8 <html>
   9 <head>
  10 <meta charset="utf-8">
  11 <title>WebGL BindAttribLocation Conformance Tests</title>
  12 <link rel="stylesheet" href="../../resources/js-test-style.css"/>
  13 <script src="../../js/js-test-pre.js"></script>
  14 <script src="../../js/webgl-test-utils.js"></script>
  15 </head>
  16 <body>
  17 <div id="description"></div>
  18 <div id="console"></div>
  19 <canvas style="border: 1px solid black;" id="canvas" width="50" height="50"></canvas>
  20 <script id="vshader" type="text/something-not-javascript">
  21 attribute vec4 vPosition;
  22 attribute vec4 vColor;
  23 varying vec4 color;
  24 void main()
  25 {
  26   gl_Position = vPosition;
  27   color = vColor;
  28 }
  29 </script>
  30 <script id="fshader" type="text/something-not-javascript">
  31 precision mediump float;
  32
  33 varying vec4 color;
  34 void main()
  35 {
  36   gl_FragColor = color;
  37 }
  38 </script>
  39 <script>
  40 "use strict";
  41 description("This test ensures WebGL implementations don't allow names that start with 'gl_' when calling bindAttribLocation.");
  42
  43 debug("");
  44 debug("Canvas.getContext");
  45
  46 var wtu = WebGLTestUtils;
  47 var gl = wtu.create3DContext("canvas");
  48 shouldBeNonNull("gl");
  49
  50 debug("");
  51 debug("Checking gl.bindAttribLocation.");
  52
  53 var program = gl.createProgram();
  54 gl.bindAttribLocation(program, 0, "gl_foo");
  55 wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION,
  56     "bindAttribLocation should return INVALID_OPERATION if name starts with 'gl_'");
  57 gl.bindAttribLocation(program, 0, "gl_TexCoord0");
  58 wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION,
  59     "bindAttribLocation should return INVALID_OPERATION if name starts with 'gl_'");
  60
  61 var vs = wtu.loadShaderFromScript(gl, 'vshader', gl.VERTEX_SHADER);
  62 var fs = wtu.loadShaderFromScript(gl, 'fshader', gl.FRAGMENT_SHADER);
  63 gl.attachShader(program, vs);
  64 gl.attachShader(program, fs);
  65
  66 var positions = gl.createBuffer();
  67 gl.bindBuffer(gl.ARRAY_BUFFER, positions);
  68 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0.5,0 ]), gl.STATIC_DRAW);
  69
  70 var colors = gl.createBuffer();
  71 gl.bindBuffer(gl.ARRAY_BUFFER, colors);
  72 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
  73     0,1,0,1,
  74     0,1,0,1,
  75     0,1,0,1]), gl.STATIC_DRAW);
  76
  77 function setBindLocations(colorLocation, positionLocation) {
  78   gl.bindAttribLocation(program, positionLocation, "vPosition");
  79   gl.bindAttribLocation(program, colorLocation, "vColor");
  80   gl.linkProgram(program);
  81   gl.useProgram(program);
  82   var linked = (gl.getProgramParameter(program, gl.LINK_STATUS) != 0);
  83   assertMsg(linked, "program linked successfully");
  84
  85   debug("vPosition:" + gl.getAttribLocation(program, "vPosition"))
  86   debug("vColor   :" + gl.getAttribLocation(program, "vColor"))
  87   assertMsg(gl.getAttribLocation(program, "vPosition") == positionLocation,
  88             "location of vPosition should be " + positionLocation);
  89   assertMsg(gl.getAttribLocation(program, "vColor") == colorLocation,
  90             "location of vColor should be " + colorLocation);
  91
  92   var ploc = gl.getAttribLocation(program, "vPosition");
  93   var cloc = gl.getAttribLocation(program, "vColor");
  94   gl.bindBuffer(gl.ARRAY_BUFFER, positions);
  95   gl.enableVertexAttribArray(positionLocation);
  96   gl.vertexAttribPointer(positionLocation, 3, gl.FLOAT, false, 0, 0);
  97   gl.bindBuffer(gl.ARRAY_BUFFER, colors);
  98   gl.enableVertexAttribArray(colorLocation);
  99   gl.vertexAttribPointer(colorLocation, 4, gl.FLOAT, false, 0, 0);
 100 }
 101
 102 function checkDraw(colorLocation, positionLocation, r, g, b, a) {
 103   gl.clearColor(0, 0, 0, 1);
 104   gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
 105   gl.drawArrays(gl.TRIANGLES, 0, 3);
 106
 107   var width = 50;
 108   var height = 50;
 109
 110   // Test several locations
 111   wtu.checkCanvasRect(gl, 0, 0, width, 1, [0, 0, 0, 255],
 112       "First line should be all black");
 113   wtu.checkCanvasRect(gl, 20, 15, 10, 1, [r, g, b, a],
 114       "Line 15 should be red for at least 10 rgba pixels starting 20 pixels in");
 115   wtu.checkCanvasRect(gl, 0, height - 1, width, 0, [0, 0, 0, 255],
 116       "Last line should be all black");
 117
 118   gl.disableVertexAttribArray(positionLocation);
 119   gl.disableVertexAttribArray(colorLocation);
 120 }
 121
 122 setBindLocations(2, 3);
 123 checkDraw(2, 3, 0, 255, 0, 255);
 124
 125 setBindLocations(0, 3);
 126 gl.disableVertexAttribArray(0);
 127 gl.vertexAttrib4f(0, 1, 0, 0, 1);
 128 checkDraw(0, 3, 255, 0, 0, 255);
 129
 130 wtu.glErrorShouldBe(gl, gl.NO_ERROR);
 131
 132 debug("");
 133 var successfullyParsed = true;
 134
 135 </script>
 136 <script src="../../js/js-test-post.js"></script>
 137
 138 </body>
 139 </html>