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| 1 <!DOCTYPE HTML> |
| 2 <html> |
| 3 <head> |
| 4 <meta charset="utf-8"> |
| 5 <title>WebGL required buffer clear behaviour test</title> |
| 6 <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| 7 <script src="../../resources/js-test-pre.js"></script> |
| 8 <script src="../resources/webgl-test.js"> </script> |
| 9 <script src="../resources/webgl-test-utils.js"> </script> |
| 10 <style type="text/css"> |
| 11 body { |
| 12 height: 3000px; |
| 13 } |
| 14 </style> |
| 15 <script type="text/javascript"> |
| 16 |
| 17 var iter = 0; |
| 18 var gl1; |
| 19 var gl2; |
| 20 |
| 21 var wtu = WebGLTestUtils; |
| 22 |
| 23 function timer() { |
| 24 if (iter == 0) { |
| 25 // some random hacky stuff to make sure that we get a compositing step |
| 26 window.scrollBy(0, 10); |
| 27 window.scrollBy(0, -10); |
| 28 iter++; |
| 29 |
| 30 setTimeout(timer, 500); |
| 31 } else if (iter == 1) { |
| 32 function clear(gl) { |
| 33 // scissor was set earlier |
| 34 gl.clearColor(0, 0, 1, 1); |
| 35 gl.clear(gl.COLOR_BUFFER_BIT); |
| 36 } |
| 37 clear(gl1); |
| 38 clear(gl2); |
| 39 |
| 40 debug("check on screen canvas"); |
| 41 wtu.checkCanvasRect(gl1, 0, 10, 10, 10, [0, 0, 255, 255], "cleared corne
r should be blue, stencil should be preserved"); |
| 42 wtu.checkCanvasRect(gl1, 0, 0, 10, 10, [0, 0, 0, 0], "remainder of buffe
r should be cleared"); |
| 43 debug("check off screen canvas"); |
| 44 wtu.checkCanvasRect(gl2, 0, 10, 10, 10, [0, 0, 255, 255], "cleared corne
r should be blue, stencil should be preserved"); |
| 45 wtu.checkCanvasRect(gl2, 0, 0, 10, 10, [255, 0, 0, 255], "remainder of b
uffer should be un-cleared red"); |
| 46 |
| 47 finishTest(); |
| 48 } |
| 49 } |
| 50 |
| 51 function go() { |
| 52 description("This test ensures WebGL implementations correctly clear the dra
wing buffer on composite if preserveDrawingBuffer is false."); |
| 53 |
| 54 debug(""); |
| 55 |
| 56 gl1 = create3DContext(document.getElementById("c")); |
| 57 c2 = document.createElement('canvas'); |
| 58 gl2 = create3DContext(c2); |
| 59 shouldBeTrue("gl1 != null"); |
| 60 shouldBeTrue("gl2 != null"); |
| 61 |
| 62 shouldBeTrue('gl1.getContextAttributes().preserveDrawingBuffer == false'); |
| 63 shouldBeTrue('gl2.getContextAttributes().preserveDrawingBuffer == false'); |
| 64 |
| 65 function init(gl) { |
| 66 gl.clearColor(1, 0, 0, 1); |
| 67 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT | gl.STENCIL_BUFFER_B
IT); |
| 68 |
| 69 // enable scissor here, before compositing, to make sure it's correctly |
| 70 // ignored and restored |
| 71 gl.scissor(0, 10, 10, 10); |
| 72 gl.enable(gl.SCISSOR_TEST); |
| 73 } |
| 74 |
| 75 init(gl1); |
| 76 init(gl2); |
| 77 |
| 78 setTimeout(timer, 500); |
| 79 } |
| 80 |
| 81 window.addEventListener("load", go, false); |
| 82 |
| 83 successfullyParsed = true; |
| 84 </script> |
| 85 </head> |
| 86 <body> |
| 87 <div id="description"></div> |
| 88 <canvas width="20" height="20" style="border: 1px solid blue;" id="c"></canvas> |
| 89 <div id="console"></div> |
| 90 </body> |
| 91 </html> |
| 92 |
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Chromium Code Reviews
Issue 8342021:
Add webgl conformance tests r15841. (Closed)
Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/webgl/sdk/tests/