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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Wrong use of EGL_DEPTH_SIZE"
href="https://bugs.webkit.org/show_bug.cgi?id=155536">155536</a>
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<th>Summary</th>
<td>Wrong use of EGL_DEPTH_SIZE
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>WebKit Local Build
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Major
</td>
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<th>Priority</th>
<td>P2
</td>
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<th>Component</th>
<td>WebCore Misc.
</td>
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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</tr>
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<th>Reporter</th>
<td>erwin@erwinrol.com
</td>
</tr></table>
<p>
<div>
<pre>In Source/WebCore/platform/graphics/egl/GLContextEGL.cpp function std::unique_ptr<GLContextEGL> GLContextEGL::createPixmapContext(EGLContext sharingContext) uses;
eglGetConfigAttrib(display, config, EGL_DEPTH_SIZE, &depth)
to (mistakenly) get the depth buffer size instead of the color depth. That depth (0 because no depth buffer was requested) is later passed to;
XCreatePixmap(x11Display, DefaultRootWindow(x11Display), 1, 1, depth)
to request a pixmap with the same color depth as the screen. And passing 0 causes that call to fail with a;
(WebKitWebProcess:669): Gdk-ERROR **: The program 'WebKitWebProcess' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadValue'.
(Details: serial 148 error_code 2 request_code 53 (core protocol) minor_code 0)
(Note to programmers: normally, X errors are reported asynchronously;
that is, you will receive the error a while after causing it.
To debug your program, run it with the GDK_SYNCHRONIZE environment
variable to change this behavior. You can then get a meaningful
backtrace from your debugger if you break on the gdk_x_error() function.)
On my hardware setup (Tegra3 Linux) setting depth hard to 32 makes things work, this is ofcourse not a real fix because other setups might not use 32bit screens.</pre>
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