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glXImportContextEXT - import another process's indirect rendering context.
GLXContext glXImportContextEXT( Display *dpy,
GLXContextID contextID )
dpy Specifies the connection to the X server.
contextID Specifies a GLX rendering context.
glXImportContextEXT creates a GLXContext given the XID of an existing GLXContext. It may
be used in place of glXCreateContext, to share another process's indirect rendering con-
Only the server-side context information can be shared between X clients; client-side
state, such as pixel storage modes, cannot be shared. Thus, glXImportContextEXT must allo-
cate memory to store client-side information. This memory is freed by calling glXFreeCon-
This call does not create a new XID. It merely makes an existing object available to the
importing client (Display *). Like any XID, it goes away when the creating client drops
its connection or the ID is explicitly deleted. Note that this is when the XID goes away.
The object goes away when the XID goes away AND the context is not current to any thread.
If contextID refers to a direct rendering context then no error is generated but glXIm-
portContextEXT returns NULL.
glXImportContextEXT is part of the EXT_import_context extension, not part of the core GLX
command set. If GLX_EXT_import_context is included in the string returned by glXQueryEx-
tensionsString, when called with argument GLX_EXTENSIONS, extension EXT_import_context is
GLXBadContext is generated if contextID does not refer to a valid context.
glXCreateContext, glXQueryVersion, glXQueryExtensionsString, glXGetContextIDEXT,
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