third_party/WebKit/LayoutTests/fast/canvas/webgl/array-setters.html

   1 <html>
   2 <head>
   3 <script src="../../../resources/js-test.js"></script>
   4 <script src="resources/webgl-test.js"></script>
   5 </head>
   6 <body>
   7 <div id="description"></div>
   8 <div id="console"></div>
   9
  10 <script>
  11 description("Test all permutations of WebGLArray setters to make sure values don't get truncated");
  12
  13 debug('Regression test for <a href="https://bugs.webkit.org/show_bug.cgi?id=33350">https://bugs.webkit.org/show_bug.cgi?id=33350</a> : <code>WebGLArray subclasses do the wrong conversion in indexSetter</code>');
  14
  15 var webGLArray = null;
  16 var array = null;
  17
  18 function testSetters(typeName, low, high) {
  19     var type = window[typeName];
  20     webGLArray = new type(2);
  21     array = [low, high];
  22     debug("Testing " + typeName);
  23     webGLArray.set(array);
  24     shouldBe("webGLArray", "array");
  25     shouldBe("webGLArray[0]", "array[0]");
  26     shouldBe("webGLArray[1]", "array[1]");
  27     webGLArray[0] = 0;
  28     webGLArray[1] = 0;
  29     shouldBe("webGLArray[0]", "0");
  30     shouldBe("webGLArray[1]", "0");
  31     webGLArray[0] = array[0];
  32     shouldBe("webGLArray[0]", "array[0]");
  33     webGLArray[1] = array[1];
  34     shouldBe("webGLArray[1]", "array[1]");
  35
  36     // Verify set() behaves correctly with shared underlying buffer.
  37     array = [0, 1, 2, 3, 4, 5];
  38     webGLArray = new type(6);
  39     webGLArray.set(array);
  40     array = webGLArray.subarray(2, 4);
  41     array[0] = 88;
  42     array[1] = 99;
  43     shouldBe("webGLArray[2]", "88");
  44     shouldBe("webGLArray[3]", "99");
  45     // pre-overlap
  46     webGLArray.set(array, 1);
  47     shouldBe("webGLArray[1]", "88");
  48     shouldBe("webGLArray[2]", "99");
  49     shouldBe("array[0]", "99");
  50     shouldBe("array[1]", "99");
  51     array[1] = 77;
  52     // post-overlap
  53     webGLArray.set(array, 3);
  54     shouldBe("webGLArray[3]", "99");
  55     shouldBe("webGLArray[4]", "77");
  56     shouldBe("array[0]", "99");
  57     shouldBe("array[1]", "99");
  58 }
  59
  60 testSetters("Int8Array", -128, 127);
  61 testSetters("Uint8Array", 0, 255);
  62 testSetters("Int16Array", -32768, 32767);
  63 testSetters("Uint16Array", 0, 65535);
  64 testSetters("Int32Array", -2147483648, 2147483647);
  65 testSetters("Uint32Array", 0, 4294967295);
  66 testSetters("Float32Array", -2.5, 3.5);
  67 </script>
  68
  69 </body>
  70 </html>