Bug 47955

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dmesg

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lspci -vvvn

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X.org log

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glxinfo

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rs600's rom (from sysfs)

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Screenshot

Mesa was compiled  with ./configure --prefix=/usr/X11R7 --disable-egl --enable-gallium-llvm --with-gallium-drivers=i915 nouveau r600 r300 swrast --enable-texture-float --with-dri-drivers=i965 r200 radeon nouveau --enable-shared-glapi --enable-gallium-g3dvl --enable-vdpau --enable-debug

Gallium libs - version 2.9. (I tried DRAW_NO_LLVM=1 - bug was still there). llvmpipe renders Celestia's window correctly in all modes.

If i set "Star style" to "Points" it works OK, another  two options (default "Fuzzy Points" and "Scaled Disks") produces white slow screen.

as far as I can see in celestia-1.6.1/src/celengine/render.cpp (function void Renderer::PointStarVertexBuffer::startSprites() ) - it uses some combination of GL_ARB_point_sprite and vertex shaders .... Any ideas what can fail  with this combo on rs600 ?


----------------------------

void Renderer::PointStarVertexBuffer::startSprites(const GLContext& _context)
{
    context = &_context;
    assert(context->getVertexProcessor() != NULL || !useSprites); // vertex shaders required for new star rendering

    unsigned int stride = sizeof(StarVertex);
    glEnableClientState(GL_VERTEX_ARRAY);
    glVertexPointer(3, GL_FLOAT, stride, &vertices[0].position);
    glEnableClientState(GL_COLOR_ARRAY);
    glColorPointer(4, GL_UNSIGNED_BYTE, stride, &vertices[0].color);

    VertexProcessor* vproc = context->getVertexProcessor();
    vproc->enable();
    vproc->use(vp::starDisc);
    vproc->enableAttribArray(6);
    vproc->attribArray(6, 1, GL_FLOAT, stride, &vertices[0].size);

    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
    glDisableClientState(GL_NORMAL_ARRAY);

    glEnable(GL_POINT_SPRITE_ARB);
    glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);

    useSprites = true;
}
--------------------------------------------

Any piglit test?

wild guess: r300g need something like  this? 

http://cgit.freedesktop.org/mesa/mesa/commit/?id=022e270b1b972b6d04890f1ac1fc2a4a4ed03ff7

Or http://cgit.freedesktop.org/mesa/mesa/commit/?id=1a69b50b3b441ce8f7a00af3a7f02c37df50f6c3

Namely calls to

draw_create_fragment_shader() and draw_bind_fragment_shader() , probably they should go into 300_state.c, r300_{create|bind}_fs_state ?

(In reply to comment #7)
> (I tried DRAW_NO_LLVM=1 - bug was still there).


FWIW, that's not a recognized environment variable. You probably meant DRAW_USE_LLVM=0.

(In reply to comment #12)
> (In reply to comment #7)
> > (I tried DRAW_NO_LLVM=1 - bug was still there).
> 
> 
> FWIW, that's not a recognized environment variable. You probably meant
> DRAW_USE_LLVM=0.

Yes, sorry. Tried twice with DRAW_USE_LLVM=0 - bug still here. I'll try to patch driver  with my idea above and see if it will fix  this  bug ...

(In reply to comment #13)
> (In reply to comment #12)
> > (In reply to comment #7)
> > > (I tried DRAW_NO_LLVM=1 - bug was still there).
> > 
> > 
> > FWIW, that's not a recognized environment variable. You probably meant
> > DRAW_USE_LLVM=0.
> 
> Yes, sorry. Tried twice with DRAW_USE_LLVM=0 - bug still here. I'll try to
> patch driver  with my idea above and see if it will fix  this  bug ...

Unfortunately, it was not as simple as copy/pasting code ... no patch from me :(

.. and spriteblast mesa demo surely don't work correctly here. (I see something remotely like _giant_ sprites flashing on screen)

Is this bug present in Mesa 8.0 and if yes, is it present in 7.11 as well?

(In reply to comment #16)
> Is this bug present in Mesa 8.0 and if yes, is it present in 7.11 as well?

yes, at minimum in 8.0 and 7.11 git _branches_. With 7.11 it was a bit unstable - but bug still around, both for celestia and pointblast/spriteblast mesa demos.

Bug still here  with mesa commit 34e53adc51ade8d53d74b6ae35bec90f1a6b9b29 ("r600g: inline r600_upload_index_buffer")

I know. The vertex shader point size output is broken on SWTCL chipsets (piglit/glsl-vs-point-size fails randomly). I haven't been able to find the cause yet.

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