Quelle test_bug1215072.html

Sprache: HTML

products/Sources/formale Sprachen/C/Firefox/dom/canvas/test/test_bug1215072.html

<!DOCTYPE HTML>
<html>

<head>
  <meta charset="utf-8">
  <title>Test for Bug 1215072</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  <script type="application/javascript">

  /** Test for Bug 1215072 **/
  try {
    var gl = document.createElement("canvas")
                     .getContext("webgl", { get stencil() { throw "bah (webgl)"; } });
    ok(!gl, "Either should have thrown or not create a webgl context!");
  } catch(ex) {
    is(ex, "bah (webgl)", "Should have thrown an exception.");
  }

  try {
    var c = document.createElement("canvas")
                    .getContext("2d", { get alpha() {throw "bah (2d)"; } });
    ok(!c, "Either should have thrown or not create a 2d context!");
  } catch(ex) {
    is(ex, "bah (2d)", "Should have thrown an exception.");
  }

  var gl2;
  try {
    gl2 = document.createElement("canvas").getContext("webgl", false);
    gl2 = document.createElement("canvas").getContext("webgl", 123);
    gl2 = document.createElement("canvas").getContext("webgl", "");
    gl2 = document.createElement("canvas").getContext("webgl", undefined);
    gl2 = document.createElement("canvas").getContext("webgl", null);
    ok(true, "Shouldn't have thrown an exception!");
  } catch(ex) {
    ok(false, "Shouldn't have thrown an exception " + ex);
  }

  var c2;
  try {
    c2 = document.createElement("canvas").getContext("2d", false);
    is(c2.getImageData(1, 1, 1, 1).data[0], 0);
    is(c2.getImageData(1, 1, 1, 1).data[1], 0);
    is(c2.getImageData(1, 1, 1, 1).data[2], 0);
    is(c2.getImageData(1, 1, 1, 1).data[3], 0);

    c2 = document.createElement("canvas").getContext("2d", 123);
    c2 = document.createElement("canvas").getContext("2d", "");
    c2 = document.createElement("canvas").getContext("2d", undefined);
    c2 = document.createElement("canvas").getContext("2d", null);
    ok(true, "Shouldn't have thrown an exception!");

    c2 = document.createElement("canvas").getContext("2d", { alpha: false });
    is(c2.getImageData(1, 1, 1, 1).data[0], 0);
    is(c2.getImageData(1, 1, 1, 1).data[1], 0);
    is(c2.getImageData(1, 1, 1, 1).data[2], 0);
    is(c2.getImageData(1, 1, 1, 1).data[3], 255);
  } catch(ex) {
    ok(false, "Shouldn't have thrown an exception " + ex);
  }

  </script>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1215072">Mozilla Bug 1215072</a>
<p id="display"></p>
<div id="content" style="display: none">

</div>
<pre id="test">
</pre>
</body>
</html>

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¤ Dauer der Verarbeitung: 0.1 Sekunden (vorverarbeitet am 2026-06-09) ¤

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