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| ** Copyright (c) 2012 The Khronos Group Inc. |
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| |
| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>WebGL Behavior After Alert and Read Pixels Test</title> |
| <link rel="stylesheet" href="../resources/js-test-style.css"/> |
| <script src="../../debug/webgl-debug.js"></script> |
| <script src="../resources/js-test-pre.js"></script> |
| <script src="../conformance/resources/webgl-test-utils.js"></script> |
| </head> |
| <body> |
| <canvas id="canvas" width="100" height="100"> </canvas> |
| <div id="description">Verify WebGL behavior after an alert and then a readPixels()</div> |
| <div id="console"></div> |
| <script> |
| "use strict"; |
| window.onload = init; |
| |
| function checkPixels(buf, width, height, thresh) { |
| for (var yy = 0; yy < height; ++yy) { |
| for (var xx = 0; xx < width; ++xx) { |
| var offset = (yy * width + xx) * 4; |
| if (Math.abs(buf[offset] - 255) > thresh || |
| Math.abs(buf[offset + 1] - 0) > thresh || |
| Math.abs(buf[offset + 2] - 0) > thresh) { |
| testFailed("Checking pixels"); |
| return false; |
| } |
| } |
| } |
| testPassed("Checking pixels"); |
| return true; |
| } |
| |
| function init() { |
| var wtu = WebGLTestUtils; |
| var gl = wtu.create3DContext("canvas"); |
| gl.clearColor(1, 0, 0, 1); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "setup should succeed"); |
| |
| wtu.checkCanvas(gl, [255, 0, 0, 255], undefined, 3); |
| |
| alert("Click me to continue"); |
| |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "setup should succeed"); |
| wtu.checkCanvas(gl, [255, 0, 0, 255], undefined, 3); |
| |
| alert("Click me to continue"); |
| |
| gl.clearColor(1, 0, 0, 1); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| wtu.checkCanvas(gl, [255, 0, 0, 255], undefined, 3); |
| } |
| |
| debug(""); |
| var successfullyParsed = true; |
| </script> |
| <script> |
| "use strict"; |
| </script> |
| |
| </body> |
| </html> |
