Glxmakecurrent - HP b2600 Reference Manual

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glXMakeCurrent

glXMakeCurrent
glXMakeCurrent: attach a GLX context to a window or a GLX pixmap.
C Specification
Bool glXMakeCurrent(
Parameters
dpy
drawable
ctx
Description
glXMakeCurrent does two things: It makes ctx the current GLX rendering context of the
calling thread, replacing the previously current context if there was one, and it attaches
ctx to a GLX drawable, either a window or a GLX pixmap. As a result of these two
actions, subsequent GL rendering calls use rendering context ctx to modify GLX
drawable drawable. Because glXMakeCurrent always replaces the current rendering
context with ctx, there can be only one current context per thread.
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 set None and ctx set to NULL
glXMakeCurrent returns True if it is successful, False otherwise. If False is returned,
the previously current rendering context and drawable (if any) remain unchanged.
Notes
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.
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Display *dpy,
GLXDrawable drawable,
GLXContext ctx)
Specifies the connection to the X server.
Specifies a GLX drawable. Must be either an X window ID or a GLX
pixmap ID.
Specifies a GLX rendering context that is to be attached to drawable.
Chapter 11