[Mesa-users] eglInitialize

Slavko Glamocanin slavko at naprave.net
Sun Jan 9 06:37:47 PST 2011 

The wayland project is using those technologies. Try going trough its
sources to see whats going on. And it does work:)

BR,
Slavko

On Sun, Jan 9, 2011 at 2:39 PM, Alberich de megres <alberich2k5 at gmail.com>wrote:

> sorry to insist, but anyone can helpme with my problem?
> Or point me to some manual-tutorial about how to setup drm + kms + egl
> from?
>
> thanks!
>
>
> On Fri, Dec 31, 2010 at 4:35 PM, Alberich de megres
> <alberich2k5 at gmail.com> wrote:
> > I'm using:
> >
> > - libdrm 2.4.23 with nouveau support
> > - Mesa from git repo (las update Dec 14th)
> > - Nvidia NV43 device (Geforce go 6200/6400)
> > - using nouveau
> > - kernel 2.6.36 custom with this config:
> > graphics support
> >  |-> <M> Direct Rendering Manager
> >  |-> <M> Low level video output switch controls
> >  |-> {*} Support for frame buffer devices
> >                 |->[*] Enable Video Mode Handling Helpers
> >                 |->[*] Enable Tile blitting support
> >                 |-> <M> VGA 16-color
> >                 |-> [*] Vesa VGA graphics
> >  |-> VGA text console
> >                 |-> All options built in kernel
> >
> > modetest says my connector id is 7 so I tried modetest -s 7:1 with this
> error
> > DRM_IOCTL_I915_GEM_APERTURE failed: Invalid argument
> > Assuming 131072Kb available aperture size
> > May lead to reduced performance or incorrect rendering
> > get chip id failed; -1
> > param 4, val: 0
> > failed to alloc buffer: Invalid argument
> >
> >
> > Thanks!!
> >
> > On Fri, Dec 31, 2010 at 3:41 PM, Chia-I Wu <olvaffe at gmail.com> wrote:
> >> On Fri, Dec 31, 2010 at 10:06 PM, Alberich de megres
> >> <alberich2k5 at gmail.com> wrote:
> >>> sorry to repost again,
> >>> but I attached a screenshoot with what happens to me.
> >>>
> >>> With single buffer, just adding glFlush() and a black clear color i
> >>> get the result I want.
> >>> But if I change the color, no matter wich, i allways the same get the
> >>> screen attached (even with the same color)
> >> I am not sure what goes wrong.  You might want to try modeset from
> >> libdrm to see if kernel modesetting is working for you (use the -s
> >> option).  It might also be helpful to list your
> >> hardware/kernel/mesa/drm versions so that others with a similar
> >> environment may help.
> >>
> >>> thanks!
> >>>
> >>> On Fri, Dec 31, 2010 at 12:32 PM, Alberich de megres
> >>> <alberich2k5 at gmail.com> wrote:
> >>>> Oh, sorry for the type, i was trying different clear color and at the
> >>>> end I didn't change it back.
> >>>>
> >>>> But on wayland the server doesn't call glFlush. How it render/draws
> >>>> the background then?
> >>>>
> >>>> Also I tried drmModePageFlip, to change buffers, but i cannot get rid
> >>>> of these wierd things (like lots of thin columns).
> >>>>
> >>>> thanks!
> >>>>
> >>>> On Fri, Dec 31, 2010 at 10:11 AM, Chia-I Wu <olvaffe at gmail.com>
> wrote:
> >>>>> On Thu, Dec 30, 2010 at 2:26 AM, Alberich de megres
> >>>>> <alberich2k5 at gmail.com> wrote:
> >>>>>> I found my error, I compiled a kernel and forgot some kms options.
> So
> >>>>>> now i can get a DRMDisplay
> >>>>>>
> >>>>>> But, now I got a different problem:
> >>>>>> I can set a mode, using drm. And I set up the minimun so i should be
> >>>>>> able to clean the backgound (or the buffer) to white and see the
> >>>>>> screen on white. But what i really get is weird things like lots of
> >>>>>> columns...
> >>>>>>
> >>>>>> Is there some place where i can read about drm+egl? My init code is
> >>>>>> barely copy+paste from wayland..
> >>>>>>
> >>>>>> I attached the code, don't blame me for the code (copy+paste stuff)
> >>>>>> i'm only trying to understand how drm+egl works so i can create one
> by
> >>>>>> my own.
> >>>>> Since you are rendering to rbo[0], you should use fb_id[0] in
> >>>>> drmModeSetCrtc.  You also need to call glFlush at the end of
> >>>>> draw_scene.  The clear color is black, not white as you said.
> >>>>>
> >>>>> These should be enough to see the correct result on screen.  But you
> >>>>> might want to go further to implement double buffering (switch
> between
> >>>>> rbo[0] and rbo[1], and flip between fb_id[0] and fb_id[1]).
> >>>>>
> >>>>>> thanks!
> >>>>>>
> >>>>>>
> >>>>>> On Mon, Dec 20, 2010 at 1:55 PM, Chia-I Wu <olvaffe at gmail.com>
> wrote:
> >>>>>>> On Tue, Dec 14, 2010 at 5:24 PM, Alberich de megres
> >>>>>>> <alberich2k5 at gmail.com> wrote:
> >>>>>>>> Hi !!
> >>>>>>>>
> >>>>>>>> I got a problem while initializing egl, using the source on git
> repo:
> >>>>>>>> git clone git://anongit.freedesktop.org/mesa/mesa
> >>>>>>>>
> >>>>>>>> So what i do is first
> >>>>>>>>
> >>>>>>>> display = (EGLDisplay) eglGetDRMDisplayMESA(fd);
> >>>>>>>> if (display == NULL) return -1;
> >>>>>>>>
> >>>>>>>> if (!eglInitialize(display, &major, &minor)) {
> >>>>>>>> ... error check
> >>>>>>>> }
> >>>>>>>>
> >>>>>>>> When I do that i receive a message:
> >>>>>>>> libEGL warning: failed to create DRM screen
> >>>>>>>>
> >>>>>>>> And sometimes i get this other on the same point:
> >>>>>>>> libEGL warning: failed to create DRM screen
> >>>>>>>> libEGL warning: EGL-DRI2: malformed or no PCI ID
> >>>>>>>>
> >>>>>>>> I tried with both nourveau modeset=1, and radeon modeset=1
> >>>>>>>>
> >>>>>>>> I compiled libdrm with the following options:
> >>>>>>>> ./configure --enable-nouveau-experimental-api
> --enable-vmwgfx-experimental-api
> >>>>>>>>
> >>>>>>>> And mesa with the following:
> >>>>>>>> ./configure --with-dri-drivers=nouveau --enable-glx-tls
> >>>>>>>> --with-driver=dri --enable-xcb --disable-glut  --enable-egl
> >>>>>>>> --enable-gles2 --with-egl-platforms=drm --disable-gallium
> >>>>>>>>
> >>>>>>>> Also i tried those recomended on wayland site:
> >>>>>>>> ./configure  --enable-egl --enable-gles2
> >>>>>>>>
> >>>>>>>> Can any one point me some light?
> >>>>>>> The configure options look fine.  It is not clear what might have
> gone
> >>>>>>> wrong.  Can you try again with EGL_LOG_LEVEL=debug set?
> >>>>>>>
> >>>>>>>> thanks!
> >>>>>>>> Albert
> >>>>>>>> _______________________________________________
> >>>>>>>> mesa-users mailing list
> >>>>>>>> mesa-users at lists.freedesktop.org
> >>>>>>>> http://lists.freedesktop.org/mailman/listinfo/mesa-users
> >>>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> --
> >>>>>>> olv at LunarG.com
> >>>>>>>
> >>>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> --
> >>>>> olv at LunarG.com
> >>>>>
> >>>>
> >>>
> >>
> >>
> >>
> >> --
> >> olv at LunarG.com
> >>
> >
> _______________________________________________
> mesa-users mailing list
> mesa-users at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/mesa-users
>



-- 
Slavko Glamočanin
http://naprave.net
GSM: 0038631847589
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