[Mesa-users] Rendering speed of OSMesa ?

[Brian Paul]

In your app, try printf("renderer = %s\n", (char *) 
glGetString(GL_RENDERER));

I suspect you're using swrast.  I think you'd have to grab the latest 
Mesa from git to get the llvmpipe version of OSMesa.

-Brian

On 07/08/2013 03:40 PM, Wonwoo Lee wrote:
> Hello Brian.
>
> I installed OSMesa on my ubuntu machine by using 'apt-get
> install libosmesa6-dev'
> glxinfo gives me : OpenGL version string: 2.1 Mesa 9.0.3
> Regarding drivers, I have no idea because I'm not familiar with Mesa /
> OSMesa libraries...
> How do I check the driver I'm using ?
>
> Best,
> Wonwoo Lee
>
>
>>
>> On 07/08/2013 12:26 AM, Wonwoo Lee wrote:
>>> Hello.
>>>
>>> I tried OSMesa to render a simple scene where a textured rectangle and a
>>> cylinder exist.
>>> The size of render buffer was 640x480.
>>>
>>> I measured execution time of rendering several times. The speed of
>>> rendering seems to depend on the number of pixels occupied by an object
>>> in a rendered scene. Smaller object resulted in faster speed.
>>
>> That's usually how it works w/ software rendering.
>>
>>
>>> My test results showed the rendering took about 20ms in average to
>>> render a scene. It was much slower than I expected although it contains
>>> a simple object.
>>>
>>> Is this a typical speed of OSMesa rendering ?
>>
>> Are you using the swrast driver?  Which version of Mesa?  I added
>> support for using llvmpipe with OSMesa a few months ago.  That would
>> give you the best performance.
>>
>> -Brian
>
>
>
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