dom/canvas/test/webgl-conf/checkout/conformance2/buffers/buffer-overflow-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 buffer overflow test for bindBufferRange</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 <script>
  20 "use strict";
  21 description("WebGL buffer overflow test: buffer overflow will not lead to failure in bindBufferRange");
  22
  23 var wtu = WebGLTestUtils;
  24
  25 var gl = wtu.create3DContext(undefined, undefined, 2);
  26
  27 debug("");
  28 var buffer1 = gl.createBuffer();
  29 gl.bindBufferRange(gl.TRANSFORM_FEEDBACK_BUFFER, 0, buffer1, 0, 4);
  30 wtu.glErrorShouldBe(gl, gl.NO_ERROR,
  31     "Calling bindBufferRange on a buffer where no storage is allocated should succeed.");
  32 shouldBe("buffer1", "gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_BINDING, 0)");
  33 shouldBe("4", "gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_SIZE, 0)");
  34 shouldBe("0", "gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_START, 0)");
  35
  36 var buffer2 = gl.createBuffer();
  37 gl.bindBuffer(gl.UNIFORM_BUFFER, buffer2);
  38 gl.bufferData(gl.UNIFORM_BUFFER, 4, gl.STATIC_DRAW);
  39 gl.bindBufferRange(gl.UNIFORM_BUFFER, 1, buffer2, 0, 8);
  40 wtu.glErrorShouldBe(gl, gl.NO_ERROR,
  41     "Calling bindBufferRange on a buffer where the storage is not big enough should succeed.");
  42 shouldBe("buffer2", "gl.getIndexedParameter(gl.UNIFORM_BUFFER_BINDING, 1)");
  43 shouldBe("8", "gl.getIndexedParameter(gl.UNIFORM_BUFFER_SIZE, 1)");
  44 shouldBe("0", "gl.getIndexedParameter(gl.UNIFORM_BUFFER_START, 1)");
  45
  46 debug("");
  47 var successfullyParsed = true;
  48 </script>
  49 <script src="../../js/js-test-post.js"></script>
  50 </body>
  51 </html>