The Tor Browser: content/canvas/test/webgl-conformance/conformance/renderbuffers/renderbuffer-initialization.html@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     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>

The Tor Browser / file revision