how glx extension uses the software render

[Mustafizur Rahaman]

Hi,

I also faced the same problem sometime back , but any how after lot of 
debugging and analyzing the code, i have got some sort of understanding, 
which i am sharing.If anywhere, my understanding is not correct, i 
apologize for that.

Check for these three files  1>glxcmds.c & glxext.c & 2> glxapi.c in 
mesa code. If you see the Makefiles, glxcmds.c & glxext.c is built for 
direct rendering & glxapi.c is built for indirect rendering, not both of 
them are built at the same time with the client program.

So, let's take glxgear.c code for example and track the code flow, e.g. 
following would be the code flow for glXCreateContext for indirect 
rendering case..

glXCreateContext==>Fake_glXCreateContext==>XMesaCreateContext==>_mesa_initialize_context==>_mesa_init_exec_table==>Inside 
here, you can see all the mesa s/w functions are initialized.

For direct rendering case, the following would be the flow...

glXCreateContext==>XF86DRICreateContextWithConfig==> Then it goes to dri 
driver's create context and like this...

I would request you to debug the code for indirect rendering for glxgear 
and see the code flow.And paralelly, try to follow the code flow for 
direct rendering(by code reading if you can't debug)..that's the way i 
followed...

Have patient..because believe me, you will need that.. :-)

Regs,
Rahaman.



Wang Baisheng wrote:
> Dear all,
>
> Now I am studying the DRI. But I have some questions and I can not get more 
> information from internet. So would you please give me some information for 
> my following questions:
>
> How glx extension requests are dispatched to mesa for software render? And how 
> glx extension requests are dispatched to DRI driver ? And I also find in x 
> server 1.3, there is a glcore, but in x server 1.5, the glcore is disappear.
>
> Thanks!
> Regards,
> Baisheng
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