third_party/WebKit/LayoutTests/compositing/layer-creation/fixed-position-out-of-view-scaled.html

   1 <!DOCTYPE html>
   2 <html>
   3 <head>
   4 <style>
   5   .fixed {
   6     position: fixed;
   7     width: 10px;
   8     height: 10px;
   9     background-color: silver;
  10   }
  11   ::-webkit-scrollbar {
  12     width: 0px;
  13     height: 0px;
  14   }
  15 </style>
  16 <script>
  17   if (window.testRunner) {
  18     testRunner.dumpAsText();
  19     testRunner.waitUntilDone();
  20   }
  21   if (window.internals && window.eventSender) {
  22     window.internals.settings.setPreferCompositingToLCDTextEnabled(true);
  23
  24     addEventListener("load", function() {
  25       document.getElementById("layerTree").innerText = internals.layerTreeAsText(document);
  26
  27       window.internals.setPageScaleFactor(0.5);
  28       setTimeout(function() {
  29         document.getElementById("layerTreeScaledDown").innerText = internals.layerTreeAsText(document);
  30
  31         window.internals.setPageScaleFactor(1.5);
  32         setTimeout(function() {
  33           document.getElementById("layerTreeScaledUp").innerText = internals.layerTreeAsText(document);
  34           testRunner.notifyDone();
  35         }, 0);
  36       }, 0);
  37     }, false);
  38   }
  39 </script>
  40 </head>
  41
  42 <!-- Fixed position elements may skip compositing without a scrollable
  43 ancestor. To make sure this test covers the intended scenario, we force the
  44 body element to be tall, so that the FrameView is scrolling. -->
  45 <body style="width: 4000px; height: 4000px;">
  46 <div style="height: 1000px">
  47   Not scaled:
  48   <pre id="layerTree"></pre>
  49   Scale=0.5:
  50   <pre id="layerTreeScaledDown"></pre>
  51   Scale=1.5:
  52   <pre id="layerTreeScaledUp"></pre>
  53 </div>
  54 <!-- The layer tree should always be the same, regardless of page scale, except on platforms that enable the applyPageScaleFactorInCompositor Setting. -->
  55 <!-- No layer in any case. -->
  56 <div class="fixed" style="top: -100px"></div>
  57 <!-- When applyPageScaleFactorInCompositor is true, this will have a composited layer when scaled down; no layer when not scaled or scaled up. -->
  58 <div class="fixed"></div>
  59 <div class="fixed" style="top: 0px; left: 1000px"></div>
  60 <!-- When applyPageScaleFactorInCompositor is true, this will have composited layer when not scaled and scaled down; no layer scaled up. -->
  61 <div class="fixed" style="top: 0px; left: 600px"></div>
  62 <!-- Always has composited layer. -->
  63 <div class="fixed" style="top: 0px; left: 0px"></div>
  64 </body>
  65 </html>