dom/canvas/test/webgl-conf/checkout/conformance/rendering/default-texture-draw-bug.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 <html>
   8 <head>
   9 <meta charset="utf-8">
  10 <title>WebGL Default Texture Draw Bug Conformance Tests</title>
  11 <link rel="stylesheet" href="../../resources/js-test-style.css"/>
  12 <script src="../../js/js-test-pre.js"></script>
  13 <script src="../../js/webgl-test-utils.js"></script>
  14
  15 </head>
  16 <body>
  17 <canvas id="c"></canvas>
  18 <div id="description"></div>
  19 <div id="console"></div>
  20 <script>
  21 "use strict";
  22 description("This test attempts to provoke a Chrome bug that occured when drawing with textures when one was never bound. <a href='http://crbug.com/524144'>crbug.com/524144</a>");
  23
  24 debug("");
  25
  26 var wtu = WebGLTestUtils;
  27 var gl = wtu.create3DContext("c");
  28 var canvas = gl.canvas;
  29
  30 if (!gl) {
  31     testFailed("WebGL context does not exist");
  32 } else {
  33     testPassed("WebGL context exists");
  34
  35     runDrawTests();
  36
  37     wtu.glErrorShouldBe(gl, gl.NO_ERROR, "there should be no errors");
  38 }
  39
  40 function runDrawTests(drawType) {
  41     debug("Test that drawing with a texture when no textures have been bound gives the expected black output");
  42     canvas.width = 50; canvas.height = 50;
  43     gl.viewport(0, 0, canvas.width, canvas.height);
  44
  45     // Set up a program that will draw with a texture
  46     var program = wtu.setupNoTexCoordTextureProgram(gl);
  47
  48     wtu.setupIndexedQuad(gl);
  49     for (var i = 0 ; i < 100 && _bufferedConsoleLogs != null; ++i) {
  50         // Clear to white.
  51         gl.clearColor(1.0, 1.0, 1.0, 1.0);
  52         gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
  53
  54         // Draw without binding any textures.
  55         gl.drawElements(gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0);
  56
  57         // Check to ensure the entire canvas is black.
  58         wtu.checkCanvasRect(gl, 0.0, 0.0, canvas.width, canvas.height,
  59                 [0.0, 0.0, 0.0], "Draw should pass", 2);
  60     }
  61 }
  62
  63 debug("");
  64 var successfullyParsed = true;
  65 </script>
  66 <script src="../../js/js-test-post.js"></script>
  67
  68 </body>
  69 </html>