LayoutTests/compositing/layer-creation/fixed-position-out-of-view-scaled-scroll.html - Issue 13828004: Avoid compositing fixed-position elements if they cannot scroll

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Issue 13828004: Avoid compositing fixed-position elements if they cannot scroll (Closed) Base URL: svn://svn.chromium.org/blink/trunk

Patch Set: Rebased and addressed feedback Created 7 years, 7 months ago

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1 <!DOCTYPE html>	1 <!DOCTYPE html>

2 <html>	2 <html>

3 <head>	3 <head>

4 <style>	4 <style>

5 .fixed {	5 .fixed {

6 position: fixed;	6 position: fixed;

7 width: 10px;	7 width: 10px;

8 height: 10px;	8 height: 10px;

9 background-color: silver;	9 background-color: silver;

10 }	10 }

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30 window.internals.setPageScaleFactor(1.5, 0, 0);	30 window.internals.setPageScaleFactor(1.5, 0, 0);

31 setTimeout(function() {	31 setTimeout(function() {

32 document.getElementById("layerTreeScaledUp").innerText = internals.lay erTreeAsText(document);	32 document.getElementById("layerTreeScaledUp").innerText = internals.lay erTreeAsText(document);

33 testRunner.notifyDone();	33 testRunner.notifyDone();

34 }, 0);	34 }, 0);

35 }, 0);	35 }, 0);

36 }, false);	36 }, false);

37 }	37 }

38 </script>	38 </script>

39 </head>	39 </head>

40 <body>	40

	41 <!-- Fixed position elements may skip compositing without a scrollable

	42 ancestor. To make sure this test covers the intended scenario, we force the

	43 body element to be tall, so that the FrameView is scrolling. -->

	44 <body style="height: 4000px;">

41 <div style="height: 1000px">	45 <div style="height: 1000px">

42 Not scaled:	46 Not scaled:

43 <pre id="layerTree"></pre>	47 <pre id="layerTree"></pre>

44 Scale=0.5:	48 Scale=0.5:

45 <pre id="layerTreeScaledDown"></pre>	49 <pre id="layerTreeScaledDown"></pre>

46 Scale=1.5:	50 Scale=1.5:

47 <pre id="layerTreeScaledUp"></pre>	51 <pre id="layerTreeScaledUp"></pre>

48 </div>	52 </div>

49 <!-- The layer tree should always be the same, regardless of page scale, except on platforms that enable the applyPageScaleFactorInCompositor Setting. -->	53 <!-- The layer tree should always be the same, regardless of page scale, except on platforms that enable the applyPageScaleFactorInCompositor Setting. -->

50 <!-- No layer in any case. -->	54 <!-- No layer in any case. -->

51 <div class="fixed" style="top: -100px"></div>	55 <div class="fixed" style="top: -100px"></div>

52 <!-- When applyPageScaleFactorInCompositor is true, this will have composited la yer when scaled down; no layer when not scaled or scaled up. -->	56 <!-- When applyPageScaleFactorInCompositor is true, this will have composited la yer when scaled down; no layer when not scaled or scaled up. -->

53 <div class="fixed"></div>	57 <div class="fixed"></div>

54 <div class="fixed" style="top: 0px; left: 1000px"></div>	58 <div class="fixed" style="top: 0px; left: 1000px"></div>

55 <!-- When applyPageScaleFactorInCompositor is true, this will have composited la yer when not scaled and scaled down; no layer scaled up. -->	59 <!-- When applyPageScaleFactorInCompositor is true, this will have composited la yer when not scaled and scaled down; no layer scaled up. -->

56 <div class="fixed" style="top: 0px; left: 600px"></div>	60 <div class="fixed" style="top: 0px; left: 600px"></div>

57 <!-- Always has composited layer. -->	61 <!-- Always has composited layer. -->

58 <div class="fixed" style="top: 0px; left: 0px"></div>	62 <div class="fixed" style="top: 0px; left: 0px"></div>

59 </body>	63 </body>

60 </html>	64 </html>

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