HP Workstation zx2000 OpenGL 1.1 Reference for HP-UX 11.x - Page 88

C glXCreateContext Notes XVisualInfo is defined in Xutil.h. It is a structure that includes visual, visualID, screen, and depth elements. A process is a single execution environment, implemented in a single address space, consisting of one or more threads. A thread is one of a set of subprocesses that share a single address space, but maintain separate program counters, stack spaces, and other related global data. A thread that is the only member of its subprocess group is equivalent to a process. It may not be possible to render to a GLX pixmap with a direct rendering context. Errors • NULL is returned if execution fails on the client side. • BadMatch is generated if the context to be created would not share the address space or the screen of the context specified by shareList. • BadValue is generated if vis is not a valid visual (for example, if a particular GLX implementation does not support it). • GLXBadContext is generated if shareList is not a GLX context and is not NULL. • BadAlloc is generated if the server does not have enough resources to allocate the new context. See Also glXDestroyContext, glXGetConfig, glXIsDirect, glXMakeCurrent 88 Chapter 3