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| /* |
| ** Copyright (c) 2012 The Khronos Group Inc. |
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| ** copy of this software and/or associated documentation files (the |
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| --> |
| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>WebGL required buffer clear behaviour test</title> |
| <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| <script src="../../js/js-test-pre.js"></script> |
| <script src="../../js/webgl-test-utils.js"> </script> |
| <style type="text/css"> |
| body { |
| height: 3000px; |
| } |
| </style> |
| </head> |
| <body> |
| <!-- Important to put the canvas at the top so that it's always visible even in the test suite runner. |
| Otherwise it just doesn't get composited in Firefox. --> |
| <canvas width="20" height="20" style="border: 1px solid blue;" id="c"></canvas> |
| <div id="description"></div> |
| <div id="console"></div> |
| <script type="application/javascript"> |
| "use strict"; |
| |
| description("This test ensures WebGL implementations correctly clear the drawing buffer " + |
| "on composite if preserveDrawingBuffer is false."); |
| debug(""); |
| |
| var wtu = WebGLTestUtils; |
| |
| var gl = wtu.create3DContext("c"); |
| shouldBeTrue("gl != null"); |
| shouldBeTrue('gl.getContextAttributes().preserveDrawingBuffer == false'); |
| |
| gl.clearColor(1, 0, 0, 1); |
| gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT | gl.STENCIL_BUFFER_BIT); |
| |
| // enable scissor here, before compositing, to make sure it's correctly |
| // ignored and restored |
| gl.scissor(0, 10, 10, 10); |
| gl.enable(gl.SCISSOR_TEST); |
| |
| function clear() { |
| // scissor was set earlier |
| gl.clearColor(0, 0, 1, 1); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| |
| wtu.checkCanvasRect(gl, 0, 10, 10, 10, [0, 0, 255, 255], |
| "cleared corner should be blue, stencil should be preserved"); |
| wtu.checkCanvasRect(gl, 0, 0, 10, 10, [0, 0, 0, 0], |
| "remainder of buffer should be cleared"); |
| |
| finishTest(); |
| return; |
| } |
| |
| wtu.waitForComposite(clear); |
| |
| var successfullyParsed = true; |
| </script> |
| </body> |
| </html> |