Hi Alessandro, OK, this shader is a default provided to at least give something to render. osg::DisplaySettings::ShaderHint is what controls the addition of this fallback, in a GLES build it defaults to GLES2 or GLES3, you can override this and switch it off via:
osg::DisplaySettings::instance()->setShaderHint(osg::DisplaySettings::SHADER_NONE); The fallback shaders can be found at OpenSceneGraph/src/osg/StateSet.cpp. Robert. On 25 January 2018 at 16:19, Alessandro Terenzi <[email protected]> wrote: > Hi Robert, > and thanks again for your help and suggestions. I'm aware of the remapping > done by OSG under the hood, indeed I had no issues with this when targeting > GLES 2 with version 3.4.0. > > I investigated my issue further and found out that a osg::Program is added to > the scene graph by the StateSet::setGlobalDefaults() method which does > something like this: > > > Code: > osg::DisplaySettings::ShaderHint shaderHint = > osg::DisplaySettings::instance()->getShaderHint(); > if (shaderHint==osg::DisplaySettings::SHADER_GL3 || > shaderHint==osg::DisplaySettings::SHADER_GLES3) > { > OSG_INFO<<" StateSet::setGlobalDefaults() Setting up GL3 compatible > shaders"<<std::endl; > > osg::ref_ptr<osg::Program> program = new osg::Program; > program->addShader(new osg::Shader(osg::Shader::VERTEX, > gl3_VertexShader)); > program->addShader(new osg::Shader(osg::Shader::FRAGMENT, > gl3_FragmentShader)); > setAttributeAndModes(program.get()); > setTextureAttribute(0, createDefaultTexture()); > addUniform(new osg::Uniform("baseTexture", 0)); > } > > > > this automatically added program is the one that fails while linking. > > Now I'm trying to understand why it fails, but my question is: why is this > program added? Is it supposed to provide a 'default' program in case there's > nothing else in the scene graph? Can I avoid it to be added? > > I'm also trying to understand where StateSet::setGlobalDefaults() is called > in the first place... > > Cheers, > Alessandro > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=72862#72862 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
