[Buildroot] [PATCH 3/6] package/mesa3d: is a full-openGL provider if X.org is present
Yann E. MORIN
yann.morin.1998 at free.fr
Tue Apr 1 21:20:57 UTC 2014
Paul, All,
On 2014-04-01 22:14 +0200, Paul Cercueil spake thusly:
> On 01/04/2014 20:14, Yann E. MORIN wrote:
> >I have to admit I am a bit lost in all this mess... :-(
>
> It works like this: regular OpenGL only works with DRI drivers, and DRI
> drivers are only usable under X11.
> Which means that all DRI drivers should depend on XORG7 (even the swrast
> one), and they should all select OpenGL.
>
> Gallium drivers are meant to be used with EGL and OpenGL ES, and only some
> of them can be used under X11 using a DRI compatibility layer (for instance,
> "nouveau" in Mesa is both a Gallium and a DRI driver). But they should also
> all work fine without X11, and will support Wayland, which is not the case
> for DRI drivers.
OK, you managed to confuse me yet a bit more! :-)
So, to sum-up our discussion on IRC, so everyone can follow:
- mesa3d has two types of drivers: Gallium drivers, and DRI drivers
- Gallium drivers provide EGL and GLES
- DRI drivers provide full-openGL, and also EGL and GLES
- for a specific chip, there are two drivers: one Gallium and one DRI
- some drivers have a DRI wrapper over a Gallium driver, wrapper that
provides DRI via the Gallium driver
- X11 needs a DRI driver
- Gallium are used for non-X11 display (eg. directfb, a wayland
compositor...)
Is the above a proper summary of what you explained me on IRC?
I'll wait for your reply before I lay out my proposal for fixing mesa3d
support in Buildroot, because if any of the above is wrong, my prioposal
would be wrong.
Regards,
Yann E. MORIN.
--
.-----------------.--------------------.------------------.--------------------.
| Yann E. MORIN | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: |
| +33 662 376 056 | Software Designer | \ / CAMPAIGN | ___ |
| +33 223 225 172 `------------.-------: X AGAINST | \e/ There is no |
| http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL | v conspiracy. |
'------------------------------^-------^------------------^--------------------'
More information about the buildroot
mailing list