third_party/WebKit/LayoutTests/fast/canvas/webgl/webgl-viewport-parameters-preserved.html

   1 <html>
   2 <head>
   3 <script src="../../../resources/js-test.js"></script>
   4 <script src="resources/webgl-test.js"></script>
   5 <script src="resources/webgl-test-utils.js"> </script>
   6 </head>
   7 <body>
   8 <div id="description"></div>
   9 <div id="console"></div>
  10 <script>
  11 description("Checks that painting WebGL contents doesn't pollute the context's viewport state.");
  12
  13 var wtu = WebGLTestUtils;
  14
  15 if (window.testRunner) {
  16   testRunner.dumpAsText();
  17   testRunner.waitUntilDone();
  18 }
  19
  20 var canvas;
  21 var context;
  22
  23 function draw() {
  24   var viewport = context.getParameter(context.VIEWPORT);
  25
  26   if (!areArraysEqual(viewport, [20, 20, 10, 10])) {
  27     testFailed(viewport + " should be [20, 20, 10, 10]. Was " + viewport);
  28   } else {
  29     testPassed("Viewport not corrupted.");
  30   }
  31
  32   if (window.testRunner)
  33     testRunner.notifyDone();
  34 }
  35
  36 window.onload = function()
  37 {
  38   if (window.initNonKhronosFramework) {
  39     window.initNonKhronosFramework(false);
  40   }
  41
  42   canvas = document.getElementById("webgl-canvas");
  43   canvas.width = 50; canvas.height = 50;
  44   context = create3DContext(canvas);
  45
  46   context.viewport(20, 20, 10, 10);
  47
  48   context.clearColor(255, 0, 0, 255);
  49   context.clear(context.COLOR_BUFFER_BIT | context.DEPTH_BUFFER_BIT);
  50
  51   // We need to ensure that the compositor has run before the drawing
  52   // takes place. Setting a timeout of zero causes the compositor to run before
  53   // the draw call. Using requestAnimationFrame caused the test to time-out.
  54   setTimeout(draw, 0);
  55 }
  56 </script>
  57 <canvas id="webgl-canvas" width="32px" height="32px"></canvas>
  58 </body>
  59 </html>