content/canvas/test/webgl-conformance/conformance/renderbuffers/renderbuffer-initialization.html@deefc01c0e14
content/canvas/test/webgl-conformance/conformance/renderbuffers/renderbuffer-initialization.html
Thu, 15 Jan 2015 21:03:48 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 21:03:48 +0100
- branch
- TOR_BUG_9701
- changeset 11
- deefc01c0e14
- permissions
- -rw-r--r--
Integrate friendly tips from Tor colleagues to make (or not) 4.5 alpha 3;
This includes removal of overloaded (but unused) methods, and addition of
a overlooked call to DataStruct::SetData(nsISupports, uint32_t, bool.)
1 <!--
2 Copyright (c) 2011 The Chromium Authors. All rights reserved.
3 Use of this source code is governed by a BSD-style license that can be
4 found in the LICENSE file.
5 -->
6 <!DOCTYPE html>
7 <html>
8 <head>
9 <meta charset="utf-8">
10 <link rel="stylesheet" href="../../resources/js-test-style.css"/>
11 <script src="../../resources/js-test-pre.js"></script>
12 <script src="../resources/webgl-test.js"></script>
13 <script src="../resources/webgl-test-utils.js"></script>
14 </head>
15 <body>
16 <canvas id="testbed" width="400" height="400" style="width: 40px; height: 40px;"></canvas>
17 <div id="description"></div>
18 <div id="console"></div>
19 <script>
20 var wtu = WebGLTestUtils;
21 description('Verify renderbuffers are initialized to 0 before being read in WebGL');
23 var gl = wtu.create3DContext("testbed");
24 if (!gl) {
25 testFailed('canvas.getContext() failed');
26 } else {
27 // Set the clear color to green. It should never show up.
28 gl.clearColor(0, 1, 0, 1);
30 runTest(gl, gl.canvas.width, gl.canvas.height, 0);
31 runTest(gl, gl.canvas.width, gl.canvas.height, 1);
32 runTest(gl, gl.canvas.width, gl.canvas.height, 0);
33 runTest(gl, gl.canvas.width, gl.canvas.height, 1);
35 // Testing buffer clearing won't change the clear values.
36 var clearColor = gl.getParameter(gl.COLOR_CLEAR_VALUE);
37 shouldBe("clearColor", "[0, 1, 0, 1]");
38 glErrorShouldBe(gl, gl.NO_ERROR, 'should be no errors');
39 }
41 function runTest(gl, width, height, order)
42 {
43 wtu.checkCanvasRect(gl, 0, 0, width, height, [0,0,0,0],
44 "internal buffers have been initialized to 0");
46 // fill the back buffer so we know that reading below happens from
47 // the renderbuffer.
48 gl.clear(gl.COLOR_BUFFER_BIT);
50 var fbo = gl.createFramebuffer();
51 gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
52 var colorbuffer = gl.createRenderbuffer();
53 gl.bindRenderbuffer(gl.RENDERBUFFER, colorbuffer);
54 switch (order) {
55 case 0:
56 allocStorage(width, height);
57 attachBuffer(colorbuffer);
58 break;
59 case 1:
60 attachBuffer(colorbuffer);
61 allocStorage(width, height);
62 break;
63 }
65 function allocStorage(width, height) {
66 gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, width, height);
67 glErrorShouldBe(gl, gl.NO_ERROR, 'should be no error after renderbufferStorage(internalformat = RGBA4).');
68 }
70 function attachBuffer(colorbuffer) {
71 gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, colorbuffer);
72 }
74 if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
75 testFailed('Framebuffer incomplete.');
76 return;
77 }
79 wtu.checkCanvasRect(gl, 0, 0, width, height, [0,0,0,0],
80 "user buffers have been initialized to 0");
82 gl.deleteFramebuffer(fbo);
83 gl.deleteRenderbuffer(colorbuffer);
85 // this clear should not matter we are about to resize
86 gl.clear(gl.COLOR_BUFFER_BIT);
88 gl.canvas.width += 1;
89 gl.canvas.height += 1;
91 debug('');
92 }
94 successfullyParsed = true;
95 </script>
96 <script>finishTest();</script>
97 </body>
98 </html>
