src/third_party/webgl/src/sdk/tests/conformance/rendering/gl-drawelements.html

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  26 -->
  27
  28 <!DOCTYPE html>
  29 <html>
  30   <head>
  31 <meta charset="utf-8">
  32     <title>WebGL drawElements Test</title>
  33     <link rel="stylesheet" href="../../resources/js-test-style.css"/>
  34     <script src="../../resources/js-test-pre.js"></script>
  35     <script src="../resources/webgl-test-utils.js"> </script>
  36     <script src="../../resources/desktop-gl-constants.js" type="text/javascript"></script>
  37 </head>
  38 <body>
  39 <canvas id="example" width="50" height="50"></canvas>
  40 <div id="description"></div>
  41 <div id="console"></div>
  42     <script id="vshader" type="x-shader/x-vertex">
  43         attribute vec4 vPosition;
  44         void main()
  45         {
  46             gl_Position = vPosition;
  47         }
  48     </script>
  49
  50     <script id="fshader" type="x-shader/x-fragment">
  51         void main()
  52         {
  53             gl_FragColor = vec4(1.0,0.0,0.0,1.0);
  54         }
  55     </script>
  56
  57     <script>
  58         "use strict";
  59         function init()
  60         {
  61             description(document.title);
  62
  63             function checkDrawElements(mode, count, type, expect, msg) {
  64               gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
  65               gl.drawElements(mode, count, type, 0);
  66               wtu.glErrorShouldBe(gl, expect, msg);
  67             }
  68
  69             var wtu = WebGLTestUtils;
  70             var gl = wtu.create3DContext("example");
  71             var program = wtu.setupProgram(gl, ["vshader", "fshader"], ["vPosition"]);
  72
  73             var vertexObject = gl.createBuffer();
  74             gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
  75             gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0.5,0 ]), gl.STATIC_DRAW);
  76             gl.enableVertexAttribArray(0);
  77             gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
  78
  79             var vertexObject = gl.createBuffer();
  80             gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, vertexObject);
  81             gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array([ 0, 1, 2]), gl.STATIC_DRAW);
  82
  83             checkDrawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT,
  84                               gl.NO_ERROR, "can call gl.DrawElements with UNSIGNED_SHORT");
  85
  86             var vertexObject = gl.createBuffer();
  87             gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, vertexObject);
  88             gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint8Array([ 0, 1, 2, 0]), gl.STATIC_DRAW);
  89
  90             checkDrawElements(
  91                 gl.TRIANGLES, 3, gl.UNSIGNED_BYTE,
  92                 gl.NO_ERROR, "can call gl.DrawElements with UNSIGNED_BYTE");
  93             checkDrawElements(
  94                 desktopGL['QUAD_STRIP'], 4, gl.UNSIGNED_BYTE,
  95                 gl.INVALID_ENUM, "gl.DrawElements with QUAD_STRIP should return INVALID_ENUM");
  96             checkDrawElements(
  97                 desktopGL['QUADS'], 4, gl.UNSIGNED_BYTE,
  98                 gl.INVALID_ENUM, "gl.DrawElements with QUADS should return INVALID_ENUM");
  99             checkDrawElements(
 100                 desktopGL['POLYGON'], 4, gl.UNSIGNED_BYTE,
 101                 gl.INVALID_ENUM, "gl.DrawElements with POLYGON should return INVALID_ENUM");
 102
 103             var vertexObject = gl.createBuffer();
 104             gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, vertexObject);
 105             gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint32Array([ 0, 1, 2]), gl.STATIC_DRAW);
 106
 107             checkDrawElements(
 108                 gl.TRIANGLES, 3, gl.UNSIGNED_INT,
 109                 gl.INVALID_ENUM, "gl.DrawElements should return INVALID_ENUM with UNSIGNED_INT");
 110             checkDrawElements(
 111                 gl.TRIANGLES, 3, gl.FLOAT,
 112                 gl.INVALID_ENUM, "gl.DrawElements should return INVALID_ENUM with FLOAT");
 113             checkDrawElements(
 114                 gl.TRIANGLES, 3, gl.SHORT,
 115                 gl.INVALID_ENUM, "gl.DrawElements should return INVALID_ENUM with SHORT");
 116
 117        }
 118
 119        init();
 120        var successfullyParsed = true;
 121     </script>
 122 <script src="../../resources/js-test-post.js"></script>
 123
 124 </body>
 125 </html>