http://bugs.freedesktop.org/show_bug.cgi?id=11705
Summary: Specifying GLX_STEREO as GL_FALSE causes
glXChooseFBConfig to fail for Pbuffers
Product: Mesa
Version: CVS
Platform: Other
OS/Version: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: GLX
AssignedTo: [email protected]
ReportedBy: [EMAIL PROTECTED]
The default value for GLX_STEREO is GL_FALSE when used in a call to
glXChooseFBConfig(). If you don't specify this value then the call returns a
chosen config correctly. However, at least in the case of Pbuffer creation, if
you explicitly pass it the default value then the call will return no matches.
This is incorrect behaviour because explicitly stating the default value should
act the same way as not stating it.
Here is the minmalist list of attributes that I use to trigger the bug when
calling the glXChooseFBConfig().
int * iattributes ....
iattributes[0] = GLX_DRAWABLE_TYPE;
iattributes[1] = GLX_PBUFFER_BIT;
iattributes[2] = GLX_RENDER_TYPE;
iattributes[3] = GLX_RGBA_BIT;
iattributes[4] = GLX_DOUBLEBUFFER;
iattributes[5] = GL_FALSE;
iattributes[4] = GLX.GLX_STEREO;
iattributes[5] = GL_FALSE;
iattributes[6] = 0;
I'm not sure when this started happening, but I have both MESA 6.5.1 and MESA
7.0 on my development server.
Other relevant OS information:
Fedora Core 6 with all latest updates to date of this bug report.
Running under Xvfb with varying command line arguments (doesn't matter what I
use here, they always fail).
MESA 6.5.1 from the FC6 distro. Mesa 7.0 compiled from source download on
Sourceforge.
Using pure software rendering. No DRI enabled or even compiled into the code.
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