Error at positions 41 near "ARB_fragment_program_shadow"

[PauloMorfeo]

When i tried to launch Spring (0.78.? + XTA 9.58 + AI libRAI), it gave me the error:

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Error at positions 41 near "ARB_fragment_program_shadow;
" when loading fragment program file groundFPshadow.fp

[PauloMorfeo]

Well, this explains it, i bet:

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$ glxinfo |grep render
direct rendering: No (If you want to find out why, try setting LIBGL_DEBUG=verbose)
OpenGL renderer string: Mesa GLX Indirect

Must enable the proprietary drivers of my NVidia so i can have 3D hardware acceleration...

[hoijui]

yep, thats it!

about your other problem, with too old spring version..
i dont know who maintains the repository for ubuntu 8.04, either Yokozar or clericvash, i think.
maybe you somehow got ot the wrong repository url, or there really is not latest version of it around. then you could still try to compile form source. once you get all the relevant source packages installed over synaptic, you would have to download and compile boost 1.35 or later, as ubuntu LTS does unly have 1.34, and current release spring needs 1.35+.
that, together with the info at:
http://springrts.com/wiki/Building_Spring_on_Linux
should get you ready.

[PauloMorfeo]

When i "make install" that, will it place the resulting files in the same places? I installed spring with all the default options.

[hoijui]

no, should be an other location by default. the package install should be in /usr, the source build should install under /usr/local.

[fylfot]

Error at position 41 near "ARB_fragment_program_shadow;
" when loading fragment program file groundFPshadow.fp: 1004: 'ARB_fragment_program_shadow': invalid program option

I have same problem on my EEE PC 900.
Computer tryed to say what mine videocard dont support this "shadow" shader extension. So, I have change "groundFPshadow.fp" (on /usr/share/games/spring/base/springcontent.sdz (is zip archive) \shaders\groundFPshadow.fp ) by pattern:

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http://www.nvidia.com/dev_content/nvopenglspecs/GL_ARB_fragment_program_shadow.txt

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...
 (8) How would an existing fragment program be ported to use the
    program option ARB_fragment_program_shadow?

       RESOLVED:  Fairly simply, but with a caveat on undefined behavior.

       !!ARBfp1.0
       # A simple example of shadow map (R <= Dt)
       #
       # SHOULD make sure that the 2D texture bound to texture unit 0:
       #    texture format of DEPTH_COMPONENT (for highest quality comparison)
       #    TEXTURE_MAG_FILTER is NEAREST
       #    TEXTURE_MIN_FILTER is NEAREST or NEAREST_MIPMAP_NEAREST
       # Assumes DEPTH_TEXTURE_MODE is LUMINANCE or INTENSITY
       #
       TEMP Result;
       ALIAS Dt = Result;
       TEX Dt, fragment.texcoord[0], texture[0], 2D;
       SGE Result, Dt.x, fragment.texcoord[0].z;      # R <= Dt

       !!ARBfp1.0
       OPTION ARB_fragment_program_shadow;
       # A simple example of shadow map (R<= Dt)
       #
       # MUST make sure that the 2D texture bound to texture unit 0:
       #    texture format of DEPTH_COMPONENT and a
       #    TEXTURE_COMPARE_MODE of COMPARE_R_TO_TEXTURE
       # Otherwise, the Result is undefined.
       #
       # Remember also that to get R <= Dt to set:
       #    TEXTURE_COMPARE_FUNC of LEQUAL
       #
       # A single compare equivalent to the above example will result if:
       #    TEXTURE_MAG_FILTER is NEAREST
       #    TEXTURE_MIN_FILTER is NEAREST or NEAREST_MIPMAP_NEAREST
       # Otherwise, percent closer filtering may be applied.
       #
       TEMP Result;
       TEX Result, fragment.texcoord[0], texture[0], SHADOW2D;
...

Then I got file:

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!!ARBfp1.0
OPTION ARB_fog_linear;
#OPTION ARB_fragment_program_shadow;

TEMP temp;
TEMP shadow,tempColor,shadeColor,shadeTex;

#Newest with "OPTION ARB_fragment_program_shadow;"
#TEX shadow, fragment.texcoord[4], texture[4], SHADOW2D;

#Oldest without extension. May be work
#ALIAS dt = shadow;
#TEX dt,fragment.texcoord[4], texture[4], 2D;
#SGE shadow, dt.x, fragment.texcoord[4].z; # shadow <= dt

##

ALIAS dt = shadow;
TEX dt,fragment.texcoord[4], texture[4], 2D;
SGE shadow, dt.x, fragment.texcoord[4].z; # shadow <= dt

##

ADD shadow.x, 1,-shadow.x;
MUL shadow.x, shadow.x,program.env[11].w;
TEX shadeTex, fragment.texcoord[1], texture[1], 2D;
MUL shadow.x, shadow.x,shadeTex.w;
ADD shadow.x, 1,-shadow.x;
LRP shadeColor, shadow.x, shadeTex, program.env[10];

TEX tempColor, fragment.texcoord[0], texture[0], 2D;
TEX temp, fragment.texcoord[2], texture[2], 2D;
MAD temp, temp, {2,2,2,2},{-1,-1,-1,-1};
ADD tempColor, tempColor,temp;
MUL result.color, tempColor,shadeColor;
MAD result.color.w,fragment.texcoord[2].z,0.1,1;
END

Then I repack archive with new file and normally start game (but graphic maybe awful...).

P.S. Sorry about my baaaaaad english.

[hoijui]

the only thing you shoudl do is disabling shadows. in your ~/.springrc file:

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Shadows=-1

[lurker]

We still haven't had anyone change spring to catch that error and disable shadows for the game?

What does that change to the shader do, does it give you shadows?

I'll make a diff of it in a bit if no one beats me to it.

[hoijui]

hmm.. i actually did this, the auto disable.. i though :/
maybe he needs to disable decalls?