Hi, I am trying to render to texture and read the results with an osg::Image. When I use standard internal formats like GL_RGB it works ok. The problem appears when I try to for example use GL_FLOAT with GL_RGB16, etc.
When I get my image back the internal format is not what I want (the one that I set up in the texture) and I see errors like: error pixelFormat = 805b ContextData::incrementContextIDUsageCount(0) to 2 Warning: detected OpenGL error 'invalid value' at after stateset.compileGLObjects in GLObjectsVisitor::apply(osg::StateSet& stateset) Here is my PBO setup code: osg::Camera::RenderTargetImplementation renderTargetImplementation = renderTargetImplementation = osg::Camera::PIXEL_BUFFER; _camera->setName(label); // viewport set in configure() method _camera->setClearColor(osg::Vec4(0., 1., 1., 1.)); _camera->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); _camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF); _camera->setRenderOrder(osg::Camera::POST_RENDER); _camera->setRenderTargetImplementation(renderTargetImplementation); _camera->setViewport(new osg::Viewport(0,0,viewport_size.x(), viewport_size.y())); _camera->getOrCreateStateSet()->setAttribute(new osg::ClampColor(GL_FALSE, GL_FALSE, GL_FALSE), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE | osg::StateAttribute::PROTECTED); // Render to texture _texture = new osg::Texture2D(); _texture->setTextureSize(viewport_size.x(), viewport_size.y()); _texture->setInternalFormat(GL_RGB16); _texture->setSourceType(GL_FLOAT); _texture->setSourceFormat(GL_RGB); _texture->setFilter(osg::Texture::MIN_FILTER,osg::Texture::NEAREST); _texture->setFilter(osg::Texture::MAG_FILTER,osg::Texture::NEAREST); _texture->setWrap(osg::Texture::WRAP_S,osg::Texture::CLAMP_TO_EDGE); _texture->setWrap(osg::Texture::WRAP_T,osg::Texture::CLAMP_TO_EDGE); _texture->setWrap(osg::Texture::WRAP_R,osg::Texture::CLAMP_TO_EDGE); // attach the texture and use it as the color buffer. _camera->attach(osg::Camera::COLOR_BUFFER, _texture); I am also having trouble with clamped values, when it does work, values are clamped in the range [0,1] although I have disabled clamping. Anyone knows how to setup a PBO to read unclamped values in non-standard formats (GL_RGBUI16, GL_RGB16F...)? Is this supported in OSG? Cheers, Omar.
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