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| |
| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>Check that the canvas is NOT recomposited after calling readPixels</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> |
| canvas { |
| border: 1px solid black; |
| } |
| .correct { |
| border: 1px solid black; |
| background-color: #00ff00; |
| } |
| </style> |
| </head> |
| <body> |
| <pre> |
| This test must be run manually. |
| |
| This test tests that a canvas is NOT cleared |
| and recomposited after calling readPixels. |
| |
| You should see a <span class="correct">green rectangle</span> |
| with black a outline on success. |
| </pre> |
| <canvas id='c'></canvas> |
| <div id="console"></div> |
| <script> |
| "use strict"; |
| var wtu = WebGLTestUtils; |
| var c = document.getElementById("c"); |
| var gl = wtu.create3DContext(c); |
| gl.clearColor(0,1,0,1); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| wtu.waitForComposite(function() { |
| gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, new Uint8Array(4)); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "no errors"); |
| }); |
| </script> |
| </body> |
| </html> |
