Hi, I am currently porting an application so that it uses the OpenGL core profile, mainly in order to gain access to modern OpenGL features under OS X. I had to make some changes to osg so that it does not use deprecated functions:
Texture::getModeUsage now only adds the texture mode if FIXED_FUNCTION_AVAILABLE is defined PolygonMode::apply now can still be used to achieve wireframe rendering in GL3 core profile (previously it was ignored completely) State::initializeExtensionProcs now only queries GL_MAX_TEXTURE_COORDS if FIXED_FUNCTION_AVAILABLE is defined Texture::applyTexParameters: CLAMP is translated to CLAMP_TO_EDGE if OSG_GL3_AVAILABLE is defined Texture::applyTexParameters: GL_DEPTH_TEXTURE_MODE_ARB is not set if neither GL1 nor GL2 is available I also made a change that is completely unrelated to core profile compatibility in State.cpp. Previously, State created a GLExtensions object in its constructor and deleted it in its destructor. It also called GLExtensions::Set when creating and deleting the extension object, which in my opinion is problematic because it may delete an extension object that was not created by the State object. I changed State so that it simply uses GLExtensions::Get(_contextID, true) to get its extension object and removed the calls to GLExtensions::Set. I did this because I had a strange and unpredictable problem with the extension object in another part of my code and wanted to simplify the initialization process. My patch is based on the current github repository (osg116). My application also uses osgText, which required much more changes to work with the core profile. Most notably I had to change the Glyph class so that it uses VBOs. It was also necessary to change the font texture format, because GL_ALPHA is deprecated. You probably do not want to merge my changes to osgText yet, because additional testing is required under different platforms. I could submit the files later after additional testing. Cheers, Andreas ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=62285#62285 Attachments: http://forum.openscenegraph.org//files/glcorefixes_855.zip _______________________________________________ osg-submissions mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscenegraph.org
