Re: [Mesa3d-users] Regarding Performance in Mesa

[vinit b. <ban...@gm...>]

For 1.1 program, there should not be a problem. But what about any 2.0
application.. in that case i cant call OpenGL on Windows from my wrapper,
right ?
My basic aim is to use 2.0 program for my application, for 1.1 i have n
number of options.

On Thu, Aug 13, 2009 at 8:14 PM, Karl Schultz <kar...@gm...>wrote:

> No.  That would require that a driver be written for each graphics card.
> Since vendors already supply OpenGL drivers on Windows, there is little
> incentive to repeat the work in Mesa for Windows.  I suppose that one could
> do it if they had the appropriate hw specs.
>
> A couple of notes back in this thread you said that you had a wrapper for
> opengl-es functions, which supposedly called Mesa.  Why not just use the
> stock Windows OpenGL and the drivers that are appropriate for your graphics
> card?  IOW, why use Mesa at all for this?  Why don't you simply call OpenGL
> on Windows from your wrapper?
>
>
> On Wed, Aug 12, 2009 at 9:08 PM, vinit bansal <ban...@gm...>wrote:
>
>> Hi Karl,
>> Thanks for your reply.
>> Yes, you are right. I am using MESA on windows.
>> But is there a way to use h/w accelaration in MESA on windows?
>>
>> Thanks & Regards
>> Vinit
>>
>>   On Wed, Aug 12, 2009 at 10:57 PM, Karl Schultz <
>> kar...@gm...> wrote:
>>
>>> Are you using the Mesa windows (gdi) driver?  It is 100% software, so
>>> performance will be slow.
>>>
>>> Also, if you are on Windows, the standard timer is very low resolution.
>>> If I remember right, that timer has about a 16 ms period, which may explain
>>> the values you are getting.  If you want higher resolution, then use the
>>> multimedia timer, or time things that take longer.
>>>
>>>   On Tue, Aug 11, 2009 at 10:52 PM, vinit bansal <ban...@gm...
>>> > wrote:
>>>
>>>>   Hi Brian,
>>>> Actually i wrote a wrapper for all opengl-es functions so that it'll
>>>> call our gl fuction only.
>>>> for ex for glorthox, internally in my wrapper i'll call glotho only.
>>>> this way i m able to run my opengl-es program using MESA .. :D:D
>>>>
>>>> My aim is , I want to know how much time my WGL calls are taking.
>>>> So i used clock function.
>>>>
>>>> here is my code:
>>>>
>>>> long start,end,time;
>>>> start = clock();
>>>> wglcreatecontext();
>>>> end = clock();
>>>> time = end-start;
>>>> fprintf("print this time in file");
>>>>
>>>> same i did for wglmakecurrent/glreadpixels etc ...
>>>> prob is , i am drawing a single frame again and again still i m getting
>>>> every time diff value.
>>>>
>>>> please find my attach logs.
>>>>
>>>> for *glreadpixels:*
>>>> *glreadpixels : 0.000000 mSec*
>>>> *glreadpixels : 16.000000 mSec*
>>>> *glreadpixels : 16.000000 mSec*
>>>> *glreadpixels : 0.000000 mSec*
>>>> *glreadpixels : 0.000000 mSec*
>>>> *glreadpixels : 16.000000 mSec*
>>>> *glreadpixels : 0.000000 mSec*
>>>> *glreadpixels : 15.000000 mSec*
>>>> *glreadpixels : 16.000000 mSec*
>>>> *glreadpixels : 0.000000 mSec*
>>>> *glreadpixels : 0.000000 mSec*
>>>> *glreadpixels : 16.000000 mSec*
>>>> *glreadpixels : 0.000000 mSec*
>>>> *glreadpixels : 16.000000 mSec*
>>>> *glreadpixels : 0.000000 mSec*
>>>> *glreadpixels : 16.000000 mSec
>>>> *
>>>>
>>>> for *wglCreateContext and wglMakeCurrent:*
>>>> *wglCreateContext : 0.000000 mSec
>>>> wglMakeCurrent : 16.000000 msec*
>>>> **
>>>> *wglCreateContext : 0.000000 mSec
>>>> wglMakeCurrent : 16.000000 msec*
>>>>
>>>> *wglCreateContext : 0.000000 mSec
>>>> wglMakeCurrent : 0.000000 msec*
>>>> **
>>>> I dont know why this time is different in each call?
>>>> **
>>>> *Best regards*
>>>> *Vinit*
>>>>
>>>>
>>>>
>>>> On Tue, Aug 11, 2009 at 8:14 PM, Brian Paul <br...@vm...> wrote:
>>>>
>>>>> vinit bansal wrote:
>>>>>
>>>>>> Hi All,
>>>>>> I tried some opengl 2.0 es example using MESA.
>>>>>> I am able to render it properly but performance is not so good.
>>>>>> Is there any flag i need to enable to use optimized performance from
>>>>>> Mesa?
>>>>>>  What is the meaning of performance data ?
>>>>>> What all it should include?
>>>>>>
>>>>>
>>>>> So you're using the opengl-es branch?  You're probably using the
>>>>> "softpipe" gallium driver.
>>>>>
>>>>> What kind of GPU do you have?
>>>>>
>>>>> -Brian
>>>>>
>>>>>
>>>>>
>>>>
>>>>
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>>>
>>
>