dom/canvas/test/webgl-conf/checkout/conformance2/buffers/bound-buffer-size-change-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.
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   7 <!DOCTYPE html>
   8 <html>
   9 <head>
  10 <meta charset="utf-8">
  11 <title>WebGL buffer size change test for bindBufferBase/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>
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  16 <body>
  17 <div id="description"></div>
  18 <div id="console"></div>
  19 <script>
  20 "use strict";
  21 description("WebGL buffer size change for bindings through bindBufferBase/bindBufferRange");
  22
  23 // This test verifies the ES3 behavior, that the bound buffer range (offset, size) is not
  24 // limited by the actual buffer size, and the driver is responsible that no out-of-range
  25 // access may happen.
  26
  27 var wtu = WebGLTestUtils;
  28
  29 var gl = wtu.create3DContext(undefined, undefined, 2);
  30
  31 debug("");
  32 debug("bindBufferBase with TRANSFORM_FEEDBACK_BUFFER target");
  33 var buffer1 = gl.createBuffer();
  34 gl.bindBufferBase(gl.TRANSFORM_FEEDBACK_BUFFER, 0, buffer1);
  35 wtu.glErrorShouldBe(gl, gl.NO_ERROR,
  36     "Calling bindBufferBase on a buffer where no storage is allocated should succeed.");
  37 shouldBe("gl.getParameter(gl.TRANSFORM_FEEDBACK_BUFFER_BINDING)", "buffer1");
  38 shouldBe("gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_BINDING, 0)", "buffer1");
  39 shouldBe("gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_SIZE, 0)", "0");
  40 shouldBe("gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_START, 0)", "0");
  41
  42 gl.bufferData(gl.TRANSFORM_FEEDBACK_BUFFER, 4, gl.STATIC_DRAW);
  43 shouldBe("gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_BINDING, 0)", "buffer1");
  44 shouldBe("gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_SIZE, 0)", "0");
  45 shouldBe("gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_START, 0)", "0");
  46
  47 wtu.glErrorShouldBe(gl, gl.NO_ERROR);
  48
  49 debug("");
  50 debug("bindBufferBase with UNIFORM_BUFFER target");
  51 var buffer2 = gl.createBuffer();
  52 gl.bindBufferBase(gl.UNIFORM_BUFFER, 1, buffer2);
  53 wtu.glErrorShouldBe(gl, gl.NO_ERROR,
  54     "Calling bindBufferBase on a buffer where no storage is allocated should succeed.");
  55 shouldBe("gl.getParameter(gl.UNIFORM_BUFFER_BINDING)", "buffer2");
  56 shouldBe("gl.getIndexedParameter(gl.UNIFORM_BUFFER_BINDING, 1)", "buffer2");
  57 shouldBe("gl.getIndexedParameter(gl.UNIFORM_BUFFER_SIZE, 1)", "0");
  58 shouldBe("gl.getIndexedParameter(gl.UNIFORM_BUFFER_START, 1)", "0");
  59
  60 gl.bufferData(gl.UNIFORM_BUFFER, 8, gl.STATIC_DRAW);
  61 shouldBe("gl.getIndexedParameter(gl.UNIFORM_BUFFER_BINDING, 1)", "buffer2");
  62 shouldBe("gl.getIndexedParameter(gl.UNIFORM_BUFFER_SIZE, 1)", "0");
  63 shouldBe("gl.getIndexedParameter(gl.UNIFORM_BUFFER_START, 1)", "0");
  64
  65 wtu.glErrorShouldBe(gl, gl.NO_ERROR);
  66
  67 debug("");
  68 debug("bindBufferRange with TRANSFORM_FEEDBACK_BUFFER target");
  69 var buffer3 = gl.createBuffer();
  70 gl.bindBufferRange(gl.TRANSFORM_FEEDBACK_BUFFER, 0, buffer3, 4, 8);
  71 wtu.glErrorShouldBe(gl, gl.NO_ERROR,
  72     "Calling bindBufferRange on a buffer where no storage is allocated should succeed.");
  73 shouldBe("gl.getParameter(gl.TRANSFORM_FEEDBACK_BUFFER_BINDING)", "buffer3");
  74 shouldBe("gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_BINDING, 0)", "buffer3");
  75 shouldBe("gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_SIZE, 0)", "8");
  76 shouldBe("gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_START, 0)", "4");
  77
  78 gl.bufferData(gl.TRANSFORM_FEEDBACK_BUFFER, 4, gl.STATIC_DRAW);
  79 shouldBe("gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_BINDING, 0)", "buffer3");
  80 shouldBe("gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_SIZE, 0)", "8");
  81 shouldBe("gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_START, 0)", "4");
  82
  83 gl.bufferData(gl.TRANSFORM_FEEDBACK_BUFFER, 12, gl.STATIC_DRAW);
  84 shouldBe("gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_BINDING, 0)", "buffer3");
  85 shouldBe("gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_SIZE, 0)", "8");
  86 shouldBe("gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_START, 0)", "4");
  87
  88 wtu.glErrorShouldBe(gl, gl.NO_ERROR);
  89
  90 debug("");
  91 debug("bindBufferRange with UNIFORM_BUFFER target");
  92 var buffer4 = gl.createBuffer();
  93 var offset = gl.getParameter(gl.UNIFORM_BUFFER_OFFSET_ALIGNMENT);
  94 gl.bindBufferRange(gl.UNIFORM_BUFFER, 1, buffer4, offset, 12);
  95 wtu.glErrorShouldBe(gl, gl.NO_ERROR,
  96     "Calling bindBufferRange on a buffer where no storage is allocated should succeed.");
  97 shouldBe("gl.getParameter(gl.UNIFORM_BUFFER_BINDING)", "buffer4");
  98 shouldBe("gl.getIndexedParameter(gl.UNIFORM_BUFFER_BINDING, 1)", "buffer4");
  99 shouldBe("gl.getIndexedParameter(gl.UNIFORM_BUFFER_SIZE, 1)", "12");
 100 shouldBe("gl.getIndexedParameter(gl.UNIFORM_BUFFER_START, 1)", "offset");
 101
 102 gl.bufferData(gl.UNIFORM_BUFFER, offset + 8, gl.STATIC_DRAW);
 103 shouldBe("gl.getIndexedParameter(gl.UNIFORM_BUFFER_BINDING, 1)", "buffer4");
 104 shouldBe("gl.getIndexedParameter(gl.UNIFORM_BUFFER_SIZE, 1)", "12");
 105 shouldBe("gl.getIndexedParameter(gl.UNIFORM_BUFFER_START, 1)", "offset");
 106
 107 gl.bufferData(gl.UNIFORM_BUFFER, offset + 12, gl.STATIC_DRAW);
 108 shouldBe("gl.getIndexedParameter(gl.UNIFORM_BUFFER_BINDING, 1)", "buffer4");
 109 shouldBe("gl.getIndexedParameter(gl.UNIFORM_BUFFER_SIZE, 1)", "12");
 110 shouldBe("gl.getIndexedParameter(gl.UNIFORM_BUFFER_START, 1)", "offset");
 111
 112 wtu.glErrorShouldBe(gl, gl.NO_ERROR);
 113
 114 debug("");
 115 var successfullyParsed = true;
 116 </script>
 117 <script src="../../js/js-test-post.js"></script>
 118 </body>
 119 </html>