[Mesa-users] eglInitialize

[Chia-I Wu]

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