Bool glXMakeCurrent(Display *dpy, GLXDrawable drawable, GLXContext ctx)
Pending commands to the previous context, if any, are flushed before it is released.
The first time ctx is made current to any thread, its viewport is set to the full size of drawable. Subsequent calls by any thread to glXMakeCurrent with ctx have no effect on its viewport.
To release the current context without assigning a new one, call glXMakeCurrent with drawable and ctx set to None and NULL respectively.
glXMakeCurrent returns True if it is successful, False otherwise. If False is returned, the previously current rendering context and drawable (if any) remain unchanged.
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.
BadAccess is generated if ctx was current to another thread at the time glXMakeCurrent was called.
GLX_BAD_DRAWABLE is generated if drawable is not a valid GLX drawable.
GLX_BAD_CONTEXT is generated if ctx is not a valid GLX context.
GLX_BAD_CONTEXT_STATE is generated if glXMakeCurrent is called between a call to glBegin and the corresponding call to glEnd.
GLX_BAD_CONTEXT_STATE is also generated if the rendering context current to the calling thread has OpenGL renderer state GL_FEEDBACK or GL_SELECT.
GLX_BAD_CURRENT_WINDOW is generated if there are pending OpenGL commands for the previous context and the current drawable is a window that is no longer valid.
BadAlloc may be generated if the server has delayed allocation of ancillary buffers until glXMakeCurrent is called, only to find that it has insufficient resources to complete the allocation.
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© 1995 Uwe Behrens All rights reserved