Re: OSMesa for MXE Octave, help wanted

[Andreas Weber]

Am 04.03.2015 um 20:16 schrieb Andreas Weber:
> Am 15.02.2015 um 21:52 schrieb John W. Eaton:
>> On 02/15/2015 11:16 AM, John W. Eaton wrote:
>>> On 02/15/2015 09:21 AM, John W. Eaton wrote:
>>>
>>>> Because the scons setup for osmesa doesn't seem to handle cross
>>>> compiling, or at least I don't know how to make it do that.
>>>
>>> OK, I think I found a way to make it work properly with scons.  I'll
>>> check in a change soon.
>>
>> I checked in my changes and have built a Windows version of 3.9.1+.
>> Printing a figure as a pdf file with 'visible' set to 'off' resulted in
>> the following warning:
>>
>> Mesa warning: couldn't open dxtn.dll, software DXTn
>> compression/decompression unavailable
>> warning: gl2ps-renderer::draw: empty feedback buffer and/or nothing else
>> to print
>> warning: called from
>>     __opengl_print__ at line 171 column 7
>>     print at line 431 column 14
>>
>> and the resulting pdf file appears to be a blank page.
> 
> Same on my system with Windows XP in a virtualbox. I tried different
> scons parameters and also to build MESA opengl32.dll but without a
> difference when it comes to OSMesa.
> 
> My last idea would be to build the OSMesa examples (from
> git://anongit.freedesktop.org/mesa/demos) in MXE-Octave to check if the
> generated osmesa.dll and libosmesa.a is okay.

I've made a stripped osdemo http://tech-chat.de/files/osdemo.tar.gz
which only displays a red torrus and saves the image as out.ppm. This
runs fine on WindowsXP with our MXE-octave generated osmesa.dll but the
torrus is green (wtf?) -- Andy