dom/canvas/test/webgl-conf/checkout/conformance/buffers/index-validation.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.
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  14 <body>
  15 <div id="description"></div>
  16 <div id="console"></div>
  17
  18 <script>
  19 "use strict";
  20 description("Tests that index validation verifies the correct number of indices");
  21
  22 function sizeInBytes(type) {
  23   switch (type) {
  24   case gl.BYTE:
  25   case gl.UNSIGNED_BYTE:
  26     return 1;
  27   case gl.SHORT:
  28   case gl.UNSIGNED_SHORT:
  29     return 2;
  30   case gl.INT:
  31   case gl.UNSIGNED_INT:
  32   case gl.FLOAT:
  33     return 4;
  34   default:
  35     throw "unknown type";
  36   }
  37 }
  38
  39 var wtu = WebGLTestUtils;
  40 var gl = wtu.create3DContext();
  41 var program = wtu.loadStandardProgram(gl);
  42
  43 // 3 vertices => 1 triangle, interleaved data
  44 var dataComplete = new Float32Array([0, 0, 0, 1,
  45                                      0, 0, 1,
  46                                      1, 0, 0, 1,
  47                                      0, 0, 1,
  48                                      1, 1, 1, 1,
  49                                      0, 0, 1]);
  50 var dataIncomplete = new Float32Array([0, 0, 0, 1,
  51                                        0, 0, 1,
  52                                        1, 0, 0, 1,
  53                                        0, 0, 1,
  54                                        1, 1, 1, 1]);
  55 var indices = new Uint16Array([0, 1, 2]);
  56
  57 debug("Testing with valid indices");
  58
  59 var bufferComplete = gl.createBuffer();
  60 gl.bindBuffer(gl.ARRAY_BUFFER, bufferComplete);
  61 gl.bufferData(gl.ARRAY_BUFFER, dataComplete, gl.STATIC_DRAW);
  62 var elements = gl.createBuffer();
  63 gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, elements);
  64 gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, indices, gl.STATIC_DRAW);
  65 gl.useProgram(program);
  66 var vertexLoc = gl.getAttribLocation(program, "a_vertex");
  67 var normalLoc = gl.getAttribLocation(program, "a_normal");
  68 gl.vertexAttribPointer(vertexLoc, 4, gl.FLOAT, false, 7 * sizeInBytes(gl.FLOAT), 0);
  69 gl.enableVertexAttribArray(vertexLoc);
  70 gl.vertexAttribPointer(normalLoc, 3, gl.FLOAT, false, 7 * sizeInBytes(gl.FLOAT), 4 * sizeInBytes(gl.FLOAT));
  71 gl.enableVertexAttribArray(normalLoc);
  72 shouldBe('gl.checkFramebufferStatus(gl.FRAMEBUFFER)', 'gl.FRAMEBUFFER_COMPLETE');
  73 wtu.glErrorShouldBe(gl, gl.NO_ERROR);
  74 shouldBeUndefined('gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 0)');
  75 wtu.glErrorShouldBe(gl, gl.NO_ERROR);
  76
  77 debug("Testing with out-of-range indices");
  78
  79 var bufferIncomplete = gl.createBuffer();
  80 gl.bindBuffer(gl.ARRAY_BUFFER, bufferIncomplete);
  81 gl.bufferData(gl.ARRAY_BUFFER, dataIncomplete, gl.STATIC_DRAW);
  82 gl.vertexAttribPointer(vertexLoc, 4, gl.FLOAT, false, 7 * sizeInBytes(gl.FLOAT), 0);
  83 gl.enableVertexAttribArray(vertexLoc);
  84 gl.disableVertexAttribArray(normalLoc);
  85 debug("Enable vertices, valid");
  86 wtu.glErrorShouldBe(gl, gl.NO_ERROR);
  87 shouldBeUndefined('gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 0)');
  88 wtu.glErrorShouldBe(gl, gl.NO_ERROR);
  89 debug("Enable normals, out-of-range");
  90 gl.vertexAttribPointer(normalLoc, 3, gl.FLOAT, false, 7 * sizeInBytes(gl.FLOAT), 4 * sizeInBytes(gl.FLOAT));
  91 gl.enableVertexAttribArray(normalLoc);
  92 wtu.glErrorShouldBe(gl, gl.NO_ERROR);
  93 shouldBeUndefined('gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 0)');
  94 wtu.glErrorShouldBe(gl, [gl.INVALID_OPERATION, gl.NO_ERROR]);
  95
  96 debug("Test with enabled attribute that does not belong to current program");
  97
  98 gl.disableVertexAttribArray(normalLoc);
  99 var extraLoc = Math.max(vertexLoc, normalLoc) + 1;
 100 gl.enableVertexAttribArray(extraLoc);
 101 debug("Enable an extra attribute with null");
 102 wtu.glErrorShouldBe(gl, gl.NO_ERROR);
 103 shouldBeUndefined('gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 0)');
 104 wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION);
 105 debug("Enable an extra attribute with insufficient data buffer");
 106 gl.vertexAttribPointer(extraLoc, 3, gl.FLOAT, false, 7 * sizeInBytes(gl.FLOAT), 4 * sizeInBytes(gl.FLOAT));
 107 wtu.glErrorShouldBe(gl, gl.NO_ERROR);
 108 shouldBeUndefined('gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 0)');
 109 debug("Pass large negative index to vertexAttribPointer");
 110 gl.vertexAttribPointer(normalLoc, 3, gl.FLOAT, false, 7 * sizeInBytes(gl.FLOAT), -2000000000 * sizeInBytes(gl.FLOAT));
 111 wtu.glErrorShouldBe(gl, gl.INVALID_VALUE);
 112 shouldBeUndefined('gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 0)');
 113
 114 var successfullyParsed = true;
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