Re: [Mesa3d-users] Mesa3d + EGL + Clutter =

[Jerome Glisse <glisse@fr...>]

On Mon, 31 Mar 2008 17:12:19 +0200
"Simon Prückl" <pruexxx@...> wrote:

> Heyho,
> 
> we are currently doing an OS with a new input interface and a new way of
> graphics output.
> We thought about using Clutter¹ with an EGL-backend, so we can skip the
> X-Server.
> It's possible to use Clutter without the X-Server - as long as there is
> something that provides EGL-Support.
> 
> We want to skip the totally skip the X-Server and make the graphics output
> as simple as possible.
> 
> As far as I've seen mesa3d provides the possibility to use EGL.
> The only problem is, that we have no idea about how Mesa3d with EGL works
> and how we can implement mesa3d to a Linux System so that Clutter can use
> this implementation.
> It would be great if someone could tell us few basics about mesa3d and a few
> details about the EGL implementation.
> Are Nvidia video cards fully supported yet?
> 
> Kindest regards and thanks in advance
> 
> Simon Prückl
> 
> --
> ¹ http://www.clutter-project.org a Toolkit for creating User Interfaces
> 

EGL is not ready for production, actual support was a hack which likely
doesn't work anymore. We have hope to support EGL in a near future,
read by the end of the year or likely during summer. The plan is to have
modesetting in the kernel (modesetting-101 branch of drm) then we
can put mesa (likely powered by gallium3d) on top of that. Of course
we welcome contribution to this. I think that what is needed now is to
reimplement mesa egl extension for modesetting to use the kernel
modesetting and do some winsys backend above this so you can get 3d
going.

Support for nvidia card will come through nouveau but if you want to
play with this without having to touch drm kernel code i suggest that
you use intel hw until nouveau support settle and especialy until they
land the modesetting stuff. But i am sure nouveau guys will welcome
any contribution.

Of course if you don't feel confortable with hacking egl in mesa to
use the new modesetting interface you can start your developement
under X and switch to EGL once someone else have done this job,
but that would be lazy ;)

Cheers,
Jerome Glisse <glisse@...>

[Mesa3d-users] Mesa3d + EGL + Clutter =

[Simon Prückl <pruexxx@gm...>]

Heyho,

we are currently doing an OS with a new input interface and a new way of
graphics output.
We thought about using Clutter¹ with an EGL-backend, so we can skip the
X-Server.
It's possible to use Clutter without the X-Server - as long as there is
something that provides EGL-Support.

We want to skip the totally skip the X-Server and make the graphics output
as simple as possible.

As far as I've seen mesa3d provides the possibility to use EGL.
The only problem is, that we have no idea about how Mesa3d with EGL works
and how we can implement mesa3d to a Linux System so that Clutter can use
this implementation.
It would be great if someone could tell us few basics about mesa3d and a few
details about the EGL implementation.
Are Nvidia video cards fully supported yet?

Kindest regards and thanks in advance

Simon Prückl

--
¹ http://www.clutter-project.org a Toolkit for creating User Interfaces

Re: [Mesa3d-users] Mesa 7.0.2, linux-fbdev, OpenGL 2.x

[Brian Paul <brian.paul@tu...>]

Peter Hanzel wrote:
> Hello.
>  
> I have just builded Mesa 7.0.2 from sources.
> Target is linux-fbdev.
>  
> It works correctly. But I get only OpenGL 1.2 version support.
> I would like to get ./fslight to work.
>  
> Is it possible to compile Mesa that GL_VERSION returns 2.x also for 
> linux-fbdev?

The driver calls _mesa_enable_sw_extensions() which should enable pretty 
much all extensions.  That should cause OpenGL 2.1 to be returned.

What does glGetString(GL_EXTENSIONS) return?

-Brian

[Mesa3d-users] Mesa 7.0.2, linux-fbdev, OpenGL 2.x

[Peter Hanzel <hanzelpeter@gm...>]

Hello.

I have just builded Mesa 7.0.2 from sources.
Target is linux-fbdev.

It works correctly. But I get only OpenGL 1.2 version support.
I would like to get ./fslight to work.

Is it possible to compile Mesa that GL_VERSION returns 2.x also for linux-fbdev?


Peter Hanzel.

Re: [Mesa3d-users] Error while executing GLSL shader

[Shibdas Bandyopadhyay <shibdas.ufl@gm...>]

It runs fine with 7.0.3.

Thanks for your help
Shibdas

On Wed, Mar 26, 2008 at 10:34 AM, Shibdas Bandyopadhyay <
shibdas.ufl@...> wrote:

> I was using Mesa 7.0.2 which is the latest stable version as per the
> mesa3d.org website.
>
> I will grab 7.0.3 and check if it runs OK.
>
> On Tue, Mar 25, 2008 at 10:53 AM, Brian Paul <
> brian.paul@...> wrote:
>
> > Shibdas Bandyopadhyay wrote:
> > > Hi,
> > >    I have a set of vertex and fragment shader for phong shading. The
> > > code works properly on a system with GPU hardware (with nvidia OGL
> > > driver) but when I try to compile it under Mesa I am getting the
> > > following error
> > >
> > > shader/slang/slang_builtin.c:433: _slang_alloc_statevar: Assertion
> > `pos
> > >  >= 0' failed
> > >
> > > Can anybody help me with this error? The vertex and pixel shaders are
> > > given below
> >
> > Seems OK here with Mesa git/master and the latest 7.0.3 release
> > candidate.  You can grab the later from http://www.mesa3d.org/beta/
> >
> > I put your shaders into two files (shibdas.fs and shibdas.vs) then
> > tested with
> >
> > progs/demos/fslight -fs shibdas.fs -vs shibdas.vs
> >
> > Which version of Mesa are you using?
> >
> > -Brian
> >
>
>

Re: [Mesa3d-users] Error while executing GLSL shader

[Shibdas Bandyopadhyay <shibdas.ufl@gm...>]

I was using Mesa 7.0.2 which is the latest stable version as per the
mesa3d.org website.

I will grab 7.0.3 and check if it runs OK.

On Tue, Mar 25, 2008 at 10:53 AM, Brian Paul <
brian.paul@...> wrote:

> Shibdas Bandyopadhyay wrote:
> > Hi,
> >    I have a set of vertex and fragment shader for phong shading. The
> > code works properly on a system with GPU hardware (with nvidia OGL
> > driver) but when I try to compile it under Mesa I am getting the
> > following error
> >
> > shader/slang/slang_builtin.c:433: _slang_alloc_statevar: Assertion `pos
> >  >= 0' failed
> >
> > Can anybody help me with this error? The vertex and pixel shaders are
> > given below
>
> Seems OK here with Mesa git/master and the latest 7.0.3 release
> candidate.  You can grab the later from http://www.mesa3d.org/beta/
>
> I put your shaders into two files (shibdas.fs and shibdas.vs) then
> tested with
>
> progs/demos/fslight -fs shibdas.fs -vs shibdas.vs
>
> Which version of Mesa are you using?
>
> -Brian
>

Re: [Mesa3d-users] Error while executing GLSL shader

[Brian Paul <brian.paul@tu...>]

Shibdas Bandyopadhyay wrote:
> Hi,
>    I have a set of vertex and fragment shader for phong shading. The 
> code works properly on a system with GPU hardware (with nvidia OGL 
> driver) but when I try to compile it under Mesa I am getting the 
> following error
> 
> shader/slang/slang_builtin.c:433: _slang_alloc_statevar: Assertion `pos 
>  >= 0' failed
> 
> Can anybody help me with this error? The vertex and pixel shaders are 
> given below

Seems OK here with Mesa git/master and the latest 7.0.3 release 
candidate.  You can grab the later from http://www.mesa3d.org/beta/

I put your shaders into two files (shibdas.fs and shibdas.vs) then 
tested with

progs/demos/fslight -fs shibdas.fs -vs shibdas.vs

Which version of Mesa are you using?

-Brian

Re: [Mesa3d-users] tutorial

[Brian Paul <brian.paul@tu...>]

Fernando Benedictti wrote:
> Hi, somebody can tell me where i can found tutorials for mesa3d?

There aren't any.

If you want to learn about OpenGL programming, there's lots of books and 
online examples (google).

-Brian

[Mesa3d-users] tutorial

[Fernando Benedictti <fbenedic@me...>]

Hi, somebody can tell me where i can found tutorials for mesa3d?

Thanks.
Fernando.-

[Mesa3d-users] Error while executing GLSL shader

[Shibdas Bandyopadhyay <shibdas.ufl@gm...>]

Hi,
   I have a set of vertex and fragment shader for phong shading. The code
works properly on a system with GPU hardware (with nvidia OGL driver) but
when I try to compile it under Mesa I am getting the following error

shader/slang/slang_builtin.c:433: _slang_alloc_statevar: Assertion `pos >=
0' failed

Can anybody help me with this error? The vertex and pixel shaders are given
below

[vertex shader]
varying vec3 normal;
varying vec3 lightDir;
varying vec3 halfVector;
void main()
{
    normal = normalize(gl_NormalMatrix * gl_Normal);
    lightDir = normalize(gl_LightSource[0].position.xyz);
    halfVector = normalize(gl_LightSource[0].halfVector.xyz);
    gl_Position = ftransform();
}


[pixel shader]
varying vec3 normal;
varying vec3 lightDir;
varying vec3 halfVector;
void main()
{
       vec4 final_color = (gl_FrontLightModelProduct.sceneColor *
gl_FrontMaterial.ambient) +
                          (gl_LightSource[0].ambient *
gl_FrontMaterial.ambient);
       vec3 N = normalize(normal);
       vec3 L = normalize(lightDir);
       float x = dot(N, L);
       if(x > 0.0)
       {
           final_color += gl_LightSource[0].diffuse *
gl_FrontMaterial.diffuse * x;
           vec3 E = normalize(halfVector);
           float specular = pow( max (dot(N, E), 0.0),
gl_FrontMaterial.shininess);
           final_color += gl_LightSource[0].specular *
gl_FrontMaterial.specular * specular;
       }
       gl_FragColor = final_color;
}


Thanks
Shibdas

[Mesa3d-users] Mesa git dri failed build

[Nigel Sollars <nsollars@gm...>]

Hi,

The latest git checkout done today fails to build with make linux-dri-x86

It barfs because glxint.h is missing from mesa/include,  could someone
kindly check this one in?

Regards
NIgel Sollars

Re: [Mesa3d-users] problem compiling an example

[Jerome Glisse <glisse@fr...>]

On Sat, 08 Mar 2008 20:47:40 -0200
Fernando Benedictti <fbenedic@...> wrote:

> Hi, my name is Fernando.
> I've tried to compile the following example: rectangle.c
> 
> #include <GL/glut.h>
> 
> main() {
> 
>    InitializeAWindowPlease();
> 
>    glClearColor (0.0, 0.0, 0.0, 0.0);
>    glClear (GL_COLOR_BUFFER_BIT);
>    glColor3f (1.0, 1.0, 1.0);
>    glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
>    glBegin(GL_POLYGON);
>       glVertex3f (0.25, 0.25, 0.0);
>       glVertex3f (0.75, 0.25, 0.0);
>       glVertex3f (0.75, 0.75, 0.0);
>       glVertex3f (0.25, 0.75, 0.0);
>    glEnd();
>    glFlush();
> 
>    UpdateTheWindowAndCheckForEvents();
> }
> 
> using the following command line:
> 
> 	gcc -o rectangle rectangle.c
> 
> and i've obtained the followings messages:
> 
> /tmp/ccSbXgxD.o: In function `main':
> rectangle.c:(.text+0x12): undefined reference to
> `InitializeAWindowPlease'
> rectangle.c:(.text+0x3a): undefined reference to `glClearColor'
> rectangle.c:(.text+0x46): undefined reference to `glClear'
> rectangle.c:(.text+0x65): undefined reference to `glColor3f'
> rectangle.c:(.text+0x91): undefined reference to `glOrtho'
> rectangle.c:(.text+0x9d): undefined reference to `glBegin'
> rectangle.c:(.text+0xbc): undefined reference to `glVertex3f'
> rectangle.c:(.text+0xdb): undefined reference to `glVertex3f'
> rectangle.c:(.text+0xfa): undefined reference to `glVertex3f'
> rectangle.c:(.text+0x119): undefined reference to `glVertex3f'
> rectangle.c:(.text+0x11e): undefined reference to `glEnd'
> rectangle.c:(.text+0x123): undefined reference to `glFlush'
> rectangle.c:(.text+0x128): undefined reference to
> `UpdateTheWindowAndCheckForEvents'
> collect2: ld returned 1 exit status
> 
> I have openSuSE 10.3, and the packages of Mesa are:
> 
> Mesa-devel-7.0.1-18
> MesaGLw-7.0.1-16
> Mesa-7.0.1-18
> Mesa-devel-static-7.0.1-18
> MesaGLw-devel-7.0.1-16
> 
> Can anybody tell me what i doing wrong?
> 
> Thanks.
> Fernando.-
> 

I suggest you look at glut tutorial on the net. There is no such
function as:
InitializeAWindowPlease
InitializeAWindowPlease

Once you got a proper example code to compile:
gcc glutexample.c -o glutexample -lGL -lglut

Cheers, 
Jerome Glisse <glisse@...>

[Mesa3d-users] problem compiling an example

[Fernando Benedictti <fbenedic@me...>]

Hi, my name is Fernando.
I've tried to compile the following example: rectangle.c

#include <GL/glut.h>

main() {

   InitializeAWindowPlease();

   glClearColor (0.0, 0.0, 0.0, 0.0);
   glClear (GL_COLOR_BUFFER_BIT);
   glColor3f (1.0, 1.0, 1.0);
   glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
   glBegin(GL_POLYGON);
      glVertex3f (0.25, 0.25, 0.0);
      glVertex3f (0.75, 0.25, 0.0);
      glVertex3f (0.75, 0.75, 0.0);
      glVertex3f (0.25, 0.75, 0.0);
   glEnd();
   glFlush();

   UpdateTheWindowAndCheckForEvents();
}

using the following command line:

	gcc -o rectangle rectangle.c

and i've obtained the followings messages:

/tmp/ccSbXgxD.o: In function `main':
rectangle.c:(.text+0x12): undefined reference to
`InitializeAWindowPlease'
rectangle.c:(.text+0x3a): undefined reference to `glClearColor'
rectangle.c:(.text+0x46): undefined reference to `glClear'
rectangle.c:(.text+0x65): undefined reference to `glColor3f'
rectangle.c:(.text+0x91): undefined reference to `glOrtho'
rectangle.c:(.text+0x9d): undefined reference to `glBegin'
rectangle.c:(.text+0xbc): undefined reference to `glVertex3f'
rectangle.c:(.text+0xdb): undefined reference to `glVertex3f'
rectangle.c:(.text+0xfa): undefined reference to `glVertex3f'
rectangle.c:(.text+0x119): undefined reference to `glVertex3f'
rectangle.c:(.text+0x11e): undefined reference to `glEnd'
rectangle.c:(.text+0x123): undefined reference to `glFlush'
rectangle.c:(.text+0x128): undefined reference to
`UpdateTheWindowAndCheckForEvents'
collect2: ld returned 1 exit status

I have openSuSE 10.3, and the packages of Mesa are:

Mesa-devel-7.0.1-18
MesaGLw-7.0.1-16
Mesa-7.0.1-18
Mesa-devel-static-7.0.1-18
MesaGLw-devel-7.0.1-16

Can anybody tell me what i doing wrong?

Thanks.
Fernando.-

[Mesa3d-users] linking with glu

[Jonathan Richard <jonathan.richard0@gm...>]

Hi, do I have to load the glu32.dll of mesa (generated by the glu project in
the mesa solution)? I do not see any difference if I load the glu32.dll that
is in the system32. Is it normal? I use mesa 7.0.1 on MS Window XP. Thanks

Jo

[Mesa3d-users] checking for library containing glXGetProcAddressARB...no

[Eran Maman <maman.eran@gm...>]

I am trying to compile Xorg with mesa and I get this:

checking for library containing glXGetProcAddressARB...no
configure: error: cannot find GL library - make sure Mesa or other OpenGL
pacakage is installed

I installed mesa (make linux-dri; make install) successfully in /usr/local/
Does anyone know what else is missing?

Eran Maman