+
+#if TARGET_HOST_POSIX_X11
+
+#ifndef GLX_CONTEXT_MAJOR_VERSION_ARB
+#define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091
+#endif
+
+#ifndef GLX_CONTEXT_MINOR_VERSION_ARB
+#define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092
+#endif
+
+#ifndef GLX_CONTEXT_FLAGS_ARB
+#define GLX_CONTEXT_FLAGS_ARB 0x2094
+#endif
+
+#ifndef GLX_CONTEXT_DEBUG_BIT_ARB
+#define GLX_CONTEXT_DEBUG_BIT_ARB 0x0001
+#endif
+
+#ifndef GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB
+#define GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x0002
+#endif
+
+typedef GLXContext (*CreateContextAttribsProc)(Display *dpy, GLXFBConfig config,
+ GLXContext share_list, Bool direct,
+ const int *attrib_list);
+
+static GLXContext fghCreateNewContext( SFG_Window* window )
+{
+ /* for color model calculation */
+ int menu = ( window->IsMenu && !fgStructure.MenuContext );
+ int index_mode = ( fgState.DisplayMode & GLUT_INDEX );
+
+ /* "classic" context creation */
+ Display *dpy = fgDisplay.Display;
+ GLXFBConfig config = *(window->Window.FBConfig);
+ int render_type = ( !menu && index_mode ) ? GLX_COLOR_INDEX_TYPE : GLX_RGBA_TYPE;
+ GLXContext share_list = NULL;
+ Bool direct = ( fgState.DirectContext != GLUT_FORCE_INDIRECT_CONTEXT );
+ GLXContext context;
+
+ /* new context creation */
+ int attribs[7];
+ CreateContextAttribsProc createContextAttribs;
+
+ /* If nothing fancy has been required, simply use the old context creation GLX API entry */
+ if ( fgState.MajorVersion == 1 && fgState.MinorVersion == 0 && fgState.ContextFlags == 0)
+ {
+ context = glXCreateNewContext( dpy, config, render_type, share_list, direct );
+ if ( context == NULL ) {
+ fgError( "could not create new OpenGL context" );
+ }
+ return context;
+ }
+
+ /* color index mode is not available anymore with OpenGL 3.0 */
+ if ( render_type == GLX_COLOR_INDEX_TYPE ) {
+ fgWarning( "color index mode is deprecated, using RGBA mode" );
+ }
+
+ attribs[0] = GLX_CONTEXT_MAJOR_VERSION_ARB;
+ attribs[1] = fgState.MajorVersion;
+ attribs[2] = GLX_CONTEXT_MINOR_VERSION_ARB;
+ attribs[3] = fgState.MinorVersion;
+ attribs[4] = GLX_CONTEXT_FLAGS_ARB;
+ attribs[5] = ((fgState.ContextFlags & GLUT_DEBUG) ? GLX_CONTEXT_DEBUG_BIT_ARB : 0) |
+ ((fgState.ContextFlags & GLUT_FORWARD_COMPATIBLE) ? GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB : 0);
+ attribs[6] = 0;
+
+ createContextAttribs = (CreateContextAttribsProc) fghGetProcAddress( "glXCreateContextAttribsARB" );
+ if ( createContextAttribs == NULL ) {
+ fgError( "glXCreateContextAttribsARB not found" );
+ }
+
+ context = createContextAttribs( dpy, config, share_list, direct, attribs );
+ if ( context == NULL ) {
+ fgError( "could not create new OpenGL %d.%d context (flags %x)",
+ fgState.MajorVersion, fgState.MinorVersion, fgState.ContextFlags );
+ }
+ return context;
+}
+#endif
+
+