1GLXCOPYCONTEXT()                                              GLXCOPYCONTEXT()
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NAME

6       glXCopyContext - copy state from one rendering context to another
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C SPECIFICATION

10       void glXCopyContext( Display *dpy,
11                            GLXContext src,
12                            GLXContext dst,
13                            unsigned long mask )
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15       delim $$
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PARAMETERS

18       dpy   Specifies the connection to the X server.
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20       src   Specifies the source context.
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22       dst   Specifies the destination context.
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24       mask  Specifies which portions of src state are to be copied to dst.
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DESCRIPTION

27       glXCopyContext  copies  selected  groups of state variables from src to
28       dst.  mask indicates which groups of state variables are to be  copied.
29       mask contains the bitwise OR of the same symbolic names that are passed
30       to  the  GL  command  glPushAttrib.   The  single   symbolic   constant
31       GL_ALL_ATTRIB_BITS  can be used to copy the maximum possible portion of
32       rendering state.
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34       The copy can be done only if the renderers named by src and  dst  share
35       an  address  space.   Two  rendering contexts share an address space if
36       both are nondirect using the same server, or if  both  are  direct  and
37       owned  by  a single process.  Note that in the nondirect case it is not
38       necessary for the calling threads to share an address space,  only  for
39       their related rendering contexts to share an address space.
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41       Not all values for GL state can be copied.  For example, pixel pack and
42       unpack state, render mode state, and select and feedback state are  not
43       copied.   The  state  that  can  be copied is exactly the state that is
44       manipulated by the GL command
45       glPushAttrib.
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47       An implicit glFlush is done by glXCopyContext if  src  is  the  current
48       context for the calling thread.
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NOTES

51       A  process  is  a single execution environment, implemented in a single
52       address space, consisting of one or more threads.
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54       A thread is one of a set of subprocesses that share  a  single  address
55       space,  but maintain separate program counters, stack spaces, and other
56       related global data.  A thread that is the only member of  its  subpro‐
57       cess group is equivalent to a process.
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ERRORS

60       BadMatch is generated if rendering contexts src and dst do not share an
61       address space or were not created with respect to the same screen.
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63       BadAccess is generated if dst is current to any thread  (including  the
64       calling thread) at the time glXCopyContext is called.
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66       GLXBadCurrentWindow  is generated if src is the current context and the
67       current drawable is a window that is no longer valid.
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69       GLXBadContext is generated if either src or dst is not a valid GLX con‐
70       text.
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SEE ALSO

73       glPushAttrib, glXCreateContext, glXIsDirect
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77                                                              GLXCOPYCONTEXT()