<html>
<head>
<base href="https://bugs.webkit.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - UNPACK_FLIP_Y_WEBGL breaks HLS video textures"
href="https://bugs.webkit.org/show_bug.cgi?id=163866">163866</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>UNPACK_FLIP_Y_WEBGL breaks HLS video textures
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
<tr>
<th>Version</th>
<td>Safari 10
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Macintosh
</td>
</tr>
<tr>
<th>OS</th>
<td>OS X 10.10
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>Normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P2
</td>
</tr>
<tr>
<th>Component</th>
<td>WebGL
</td>
</tr>
<tr>
<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>electroteque@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dino@apple.com
</td>
</tr></table>
<p>
<div>
<pre>Hi there after some extensive testing I have confirmed that in Safari 10 it has broken WebGL video textures for HLS streams. It is an issue on IOS 9 Safari as well as Webkit nightly.
It is regarding this FlipY flag
_gl.pixelStorei( _gl.UNPACK_FLIP_Y_WEBGL, true );
If this is disabled the video texture is rendering but it is upside down.Although I believe this flag is needed for hardware acceleration correct ?
Reference to three.js ticket.
<a href="https://github.com/mrdoob/three.js/issues/9754">https://github.com/mrdoob/three.js/issues/9754</a>
Reference to possibly related webkit ticket #162491
I have found some raw webgl examples that I have modified for the test. The HLS streams use a CORS proxy because of the known severe limitation there.
With FlipY disabled and "working"
<a href="http://dev.electroteque.org/threejs/webglworking.html">http://dev.electroteque.org/threejs/webglworking.html</a>
With FlipY enabled
<a href="http://dev.electroteque.org/threejs/webglflip.html">http://dev.electroteque.org/threejs/webglflip.html</a></pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>