Re: [osg-users] Memory issues when using uniform shader variables on Intel HD graphics
Hi, thanks for your response. The memory usage only increases if I add a uniform variable to the stateset and use it in the shader. I also noticed that the memory increases just once per osg::Program, so I can use the same program in multiple statsets, even with different uniform parameters. So, for now, I'm limiting the number of different shaders I use and try to reuse the same program as often as possible. It's not perfect but works for me. ... Thank you! Cheers, Clemens -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50631#50631 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Memory issues when using uniform shader variables on Intel HD graphics
Hi Clemens- What version of the OSG are you using? There was a bug fixed in OSG r13015 that would cause out of memory issues for our application. It still seems like the Intel driver uses more memory than the other drivers (AMD/nVidia), but it's workable now. http://www.openscenegraph.org/projects/osg/changeset/13015 As an aside, the other fix I needed to do for the Intel drivers was to manually compute the half-vector, as gl_LightSource[].halfVector was not being provided with the latest drivers. With those two fixes we're running quite nicely on the HD 4000 graphics we have here. Take care, Baker -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50633#50633 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Memory issues when using uniform shader variables on Intel HD graphics
Hi
What exactly makes memory usage increase? What if you attach shader without
uniform, or without adding uniform to stateset? Try to add #version 110
directive as first line of your shaders, does it make any difference?
I think you'd better send bugreport to intel, best if you can reproduce this
with pure opengl.
Cheers.
09.10.2012, 09:28, Clemens Spencer clemens-m...@gmx.de:
Hi,
I'm trying to use shaders on an Intel HD 3000 graphics chip (Windows7 x64,
latest graphics driver).
As soon as I pass a uniform variable to the shader (regardless of the type),
the memory of my process increases by about 400MB. Other than that, the
shader works fine.
The size of the object the shader is attached to or the complexity of the
shader do not make a difference. Every additional shader (containing at least
one uniform variable) I use, increases the memory usage by another 400MB.
The problem does not occur on another machine with some NVidia graphics card.
Has anyone encountered a similar problem or does someone have an idea what
could cause a problem like this?
Code:
osg::Program *program = new osg::Program;
osg::Shader *frag = new osg::Shader( osg::Shader::FRAGMENT, fragSource.str()
);
osg::Shader *vert = new osg::Shader( osg::Shader::VERTEX, vertSource.str() );
program-addShader( frag );
program-addShader( vert );
// add shader to stateSet
sset-setAttributeAndModes( program, osg::StateAttribute::ON );
// add uniform variable
osg::Uniform *var = new osg::Uniform(MATERIAL_COLOR,
osg::Vec4(1.0f,1.0f,0.0f,1.0f));
sset-addUniform(var);
Code:
// Vertex Shader
void main()
{
gl_Position = ftransform();
gl_ClipVertex = gl_ModelViewMatrix * gl_Vertex;
}
// Fragment Shader
uniform vec4 MATERIAL_COLOR;
void main()
{
gl_FragColor = MATERIAL_COLOR;
}
By the way, I know I'm not using reference pointers :? but this shouldn't be
a problem in this little example.
...
Thank you!
Cheers,
Clemens[/code]
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[osg-users] Memory issues when using uniform shader variables on Intel HD graphics
Hi,
I'm trying to use shaders on an Intel HD 3000 graphics chip (Windows7 x64,
latest graphics driver).
As soon as I pass a uniform variable to the shader (regardless of the type),
the memory of my process increases by about 400MB. Other than that, the shader
works fine.
The size of the object the shader is attached to or the complexity of the
shader do not make a difference. Every additional shader (containing at least
one uniform variable) I use, increases the memory usage by another 400MB.
The problem does not occur on another machine with some NVidia graphics card.
Has anyone encountered a similar problem or does someone have an idea what
could cause a problem like this?
Code:
osg::Program *program = new osg::Program;
osg::Shader *frag = new osg::Shader( osg::Shader::FRAGMENT, fragSource.str() );
osg::Shader *vert = new osg::Shader( osg::Shader::VERTEX, vertSource.str() );
program-addShader( frag );
program-addShader( vert );
// add shader to stateSet
sset-setAttributeAndModes( program, osg::StateAttribute::ON );
// add uniform variable
osg::Uniform *var = new osg::Uniform(MATERIAL_COLOR,
osg::Vec4(1.0f,1.0f,0.0f,1.0f));
sset-addUniform(var);
Code:
// Vertex Shader
void main()
{
gl_Position = ftransform();
gl_ClipVertex = gl_ModelViewMatrix * gl_Vertex;
}
// Fragment Shader
uniform vec4 MATERIAL_COLOR;
void main()
{
gl_FragColor = MATERIAL_COLOR;
}
By the way, I know I'm not using reference pointers :? but this shouldn't be a
problem in this little example.
...
Thank you!
Cheers,
Clemens[/code]
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http://forum.openscenegraph.org/viewtopic.php?p=50349#50349
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