1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/canvas/test/webgl-conformance/conformance/rendering/gl-scissor-test.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,73 @@
1.4 +<!--
1.5 +Copyright (c) 2011 The Chromium Authors. All rights reserved.
1.6 +Use of this source code is governed by a BSD-style license that can be
1.7 +found in the LICENSE file.
1.8 + -->
1.9 +<!DOCTYPE html>
1.10 +<html>
1.11 +<head>
1.12 +<meta charset="utf-8">
1.13 +<title>WebGL Scissor Test</title>
1.14 +<link rel="stylesheet" href="../../resources/js-test-style.css"/>
1.15 +<script src="../../resources/desktop-gl-constants.js" type="text/javascript"></script>
1.16 +<script src="../../debug/webgl-debug.js"></script>
1.17 +<script src="../../resources/js-test-pre.js"></script>
1.18 +<script src="../resources/webgl-test-utils.js"></script>
1.19 +</head>
1.20 +<body>
1.21 +<div id="description"></div>
1.22 +<div id="console"></div>
1.23 +<canvas id="canvas" width="2" height="2" style="width: 40px; height: 40px;"> </canvas>
1.24 +<script>
1.25 +description("Check if glScissor setting works.");
1.26 +
1.27 +debug("");
1.28 +debug("Canvas.getContext");
1.29 +
1.30 +var wtu = WebGLTestUtils;
1.31 +var gl = wtu.create3DContext(document.getElementById("canvas"));
1.32 +if (!gl) {
1.33 + testFailed("context does not exist");
1.34 +} else {
1.35 + testPassed("context exists");
1.36 +
1.37 + debug("");
1.38 +
1.39 + gl.clearColor(0,0,0,0);
1.40 + gl.clear(gl.COLOR_BUFFER_BIT);
1.41 +
1.42 + // clear a portion of our FBO
1.43 + gl.enable(gl.SCISSOR_TEST);
1.44 + gl.scissor(0, 0, 1, 1);
1.45 + gl.clearColor(0,1,0,1);
1.46 + gl.clear(gl.COLOR_BUFFER_BIT);
1.47 +
1.48 + var b = new Uint8Array(2 * 2 * 4);
1.49 + gl.readPixels(0, 0, 2, 2, gl.RGBA, gl.UNSIGNED_BYTE, b);
1.50 +
1.51 + function checkPixel(b, x, y, color) {
1.52 + var offset = (y * 2 + x) * 4;
1.53 + var match = true;
1.54 + for (var c = 0; c < 4; ++c) {
1.55 + if (b[offset + c] != color[c] * 255) {
1.56 + match = false;
1.57 + break;
1.58 + }
1.59 + }
1.60 + assertMsg(match, "pixel at " + x + ", " + y + " is expected value");
1.61 + }
1.62 +
1.63 + checkPixel(b, 0, 0, [0, 1, 0, 1]);
1.64 + checkPixel(b, 1, 0, [0, 0, 0, 0]);
1.65 + checkPixel(b, 0, 1, [0, 0, 0, 0]);
1.66 + checkPixel(b, 1, 1, [0, 0, 0, 0]);
1.67 +}
1.68 +
1.69 +debug("");
1.70 +successfullyParsed = true;
1.71 +
1.72 +</script>
1.73 +<script>finishTest();</script>
1.74 +
1.75 +</body>
1.76 +</html>
