diff --git a/freeglut/freeglut/src/freeglut_window.c b/freeglut/freeglut/src/freeglut_window.c index a5884ae..0542017 100644 --- a/freeglut/freeglut/src/freeglut_window.c +++ b/freeglut/freeglut/src/freeglut_window.c @@ -177,7 +177,7 @@ typedef HGLRC (WINAPI * PFNWGLCREATECONTEXTATTRIBSARBPROC) (HDC hDC, HGLRC hShar static int fghIsLegacyContextVersionRequested( void ) { - return fgState.MajorVersion == 1 && fgState.MinorVersion == 0; + return fgState.MajorVersion < 2 || (fgState.MajorVersion == 2 && fgState.MinorVersion <= 1); } static int fghIsLegacyContextRequested( void ) @@ -443,10 +443,17 @@ static GLXContext fghCreateNewContext( SFG_Window* window ) /* new context creation */ int attributes[9]; - CreateContextAttribsProc createContextAttribs; + CreateContextAttribsProc createContextAttribs = (CreateContextAttribsProc) fghGetProcAddress( "glXCreateContextAttribsARB" ); + + /* glXCreateContextAttribsARB not found, yet the user has requested the new context creation */ + if ( !createContextAttribs && !fghIsLegacyContextRequested() ) { + fgWarning( "OpenGL >2.1 context requested but glXCreateContextAttribsARB is not available! Falling back to legacy context creation" ); + fgState.MajorVersion = 2; + fgState.MinorVersion = 1; + } /* If nothing fancy has been required, simply use the old context creation GLX API entry */ - if ( fghIsLegacyContextRequested() ) + if ( fghIsLegacyContextRequested() || !createContextAttribs ) { context = glXCreateNewContext( dpy, config, render_type, share_list, direct ); if ( context == NULL ) { @@ -462,11 +469,6 @@ static GLXContext fghCreateNewContext( SFG_Window* window ) fghFillContextAttributes( attributes ); - createContextAttribs = (CreateContextAttribsProc) fghGetProcAddress( "glXCreateContextAttribsARB" ); - if ( createContextAttribs == NULL ) { - fgError( "glXCreateContextAttribsARB not found" ); - } - context = createContextAttribs( dpy, config, share_list, direct, attributes ); if ( context == NULL ) { fghContextCreationError();