1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/canvas/test/webgl-conformance/conformance/renderbuffers/renderbuffer-initialization.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,98 @@
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 +<link rel="stylesheet" href="../../resources/js-test-style.css"/>
1.14 +<script src="../../resources/js-test-pre.js"></script>
1.15 +<script src="../resources/webgl-test.js"></script>
1.16 +<script src="../resources/webgl-test-utils.js"></script>
1.17 +</head>
1.18 +<body>
1.19 +<canvas id="testbed" width="400" height="400" style="width: 40px; height: 40px;"></canvas>
1.20 +<div id="description"></div>
1.21 +<div id="console"></div>
1.22 +<script>
1.23 +var wtu = WebGLTestUtils;
1.24 +description('Verify renderbuffers are initialized to 0 before being read in WebGL');
1.25 +
1.26 +var gl = wtu.create3DContext("testbed");
1.27 +if (!gl) {
1.28 + testFailed('canvas.getContext() failed');
1.29 +} else {
1.30 + // Set the clear color to green. It should never show up.
1.31 + gl.clearColor(0, 1, 0, 1);
1.32 +
1.33 + runTest(gl, gl.canvas.width, gl.canvas.height, 0);
1.34 + runTest(gl, gl.canvas.width, gl.canvas.height, 1);
1.35 + runTest(gl, gl.canvas.width, gl.canvas.height, 0);
1.36 + runTest(gl, gl.canvas.width, gl.canvas.height, 1);
1.37 +
1.38 + // Testing buffer clearing won't change the clear values.
1.39 + var clearColor = gl.getParameter(gl.COLOR_CLEAR_VALUE);
1.40 + shouldBe("clearColor", "[0, 1, 0, 1]");
1.41 + glErrorShouldBe(gl, gl.NO_ERROR, 'should be no errors');
1.42 +}
1.43 +
1.44 +function runTest(gl, width, height, order)
1.45 +{
1.46 + wtu.checkCanvasRect(gl, 0, 0, width, height, [0,0,0,0],
1.47 + "internal buffers have been initialized to 0");
1.48 +
1.49 + // fill the back buffer so we know that reading below happens from
1.50 + // the renderbuffer.
1.51 + gl.clear(gl.COLOR_BUFFER_BIT);
1.52 +
1.53 + var fbo = gl.createFramebuffer();
1.54 + gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
1.55 + var colorbuffer = gl.createRenderbuffer();
1.56 + gl.bindRenderbuffer(gl.RENDERBUFFER, colorbuffer);
1.57 + switch (order) {
1.58 + case 0:
1.59 + allocStorage(width, height);
1.60 + attachBuffer(colorbuffer);
1.61 + break;
1.62 + case 1:
1.63 + attachBuffer(colorbuffer);
1.64 + allocStorage(width, height);
1.65 + break;
1.66 + }
1.67 +
1.68 + function allocStorage(width, height) {
1.69 + gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, width, height);
1.70 + glErrorShouldBe(gl, gl.NO_ERROR, 'should be no error after renderbufferStorage(internalformat = RGBA4).');
1.71 + }
1.72 +
1.73 + function attachBuffer(colorbuffer) {
1.74 + gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, colorbuffer);
1.75 + }
1.76 +
1.77 + if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
1.78 + testFailed('Framebuffer incomplete.');
1.79 + return;
1.80 + }
1.81 +
1.82 + wtu.checkCanvasRect(gl, 0, 0, width, height, [0,0,0,0],
1.83 + "user buffers have been initialized to 0");
1.84 +
1.85 + gl.deleteFramebuffer(fbo);
1.86 + gl.deleteRenderbuffer(colorbuffer);
1.87 +
1.88 + // this clear should not matter we are about to resize
1.89 + gl.clear(gl.COLOR_BUFFER_BIT);
1.90 +
1.91 + gl.canvas.width += 1;
1.92 + gl.canvas.height += 1;
1.93 +
1.94 + debug('');
1.95 +}
1.96 +
1.97 +successfullyParsed = true;
1.98 +</script>
1.99 +<script>finishTest();</script>
1.100 +</body>
1.101 +</html>
