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glximportcontextext(3g) [centos man page]


glXImportContextEXT - import another process's indirect rendering context. C SPECIFICATION
GLXContext glXImportContextEXT(Display * dpy, GLXContextID contextID); PARAMETERS
dpy Specifies the connection to the X server. contextID Specifies a GLX rendering context. DESCRIPTION
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 context. 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 allocate memory to store client-side information. This memory is freed by calling glXFreeContextEXT(). 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 glXImportContextEXT returns NULL. glXImportContextEXT is part of the EXT_import_context extension, not part of the core GLX command set. If _glxextstring(EXT_import_context) is included in the string returned by glXQueryExtensionsString(), when called with argument GLX_EXTENSIONS, extension EXT_import_context is supported. ERRORS
GLXBadContext is generated if contextID does not refer to a valid context. SEE ALSO
glXCreateContext(), glXQueryVersion(), glXQueryExtensionsString(), glXGetContextIDEXT(), glXFreeContextEXT() COPYRIGHT
Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see AUTHORS 06/10/2014 GLXIMPORTCONTEXTEXT(3G)

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glXCreateNewContext - create a new GLX rendering context C SPECIFICATION
GLXContext glXCreateNewContext(Display * dpy, GLXFBConfig config, int render_type, GLXContext share_list, Bool direct); PARAMETERS
dpy Specifies the connection to the X server. config Specifies the GLXFBConfig structure with the desired attributes for the context. render_type Specifies the type of the context to be created. Must be one of GLX_RGBA_TYPE or GLX_COLOR_INDEX_TYPE. share_list Specifies the context with which to share display lists. NULL indicates that no sharing is to take place. share_list Specifies whether rendering is to be done with a direct connection to the graphics system if possible (True) or through the X server (False). DESCRIPTION
glXCreateNewContext creates a GLX rendering context and returns its handle. This context can be used to render into GLX windows, pixmaps, or pixel buffers. If glXCreateNewContext fails to create a rendering context, NULL is returned. If render_type is GLX_RGBA_TYPE, then a context that supports RGBA rendering is created. If config is GLX_COLOR_INDEX_TYPE, then context supporting color-index rendering is created. If render_type is not NULL, then all display-list indexes and definitions are shared by context render_type and by the newly created context. An arbitrary number of contexts can share a single display-list space. However, all rendering contexts that share a single display-list space must themselves exist in the same address space. Two rendering contexts share an address space if both are nondirect using the same server, or if both are direct and owned by a single process. Note that in the nondirect case, it is not necessary for the calling threads to share an address space, only for their related rendering contexts to share an address space. If share_list is True, then a direct-rendering context is created if the implementation supports direct rendering, if the connection is to an X server that is local, and if a direct-rendering context is available. (An implementation may return an indirect context when share_list is True.) If share_list is False, then a rendering context that renders through the X server is always created. Direct rendering provides a performance advantage in some implementations. However, direct-rendering contexts cannot be shared outside a single process, and they may be unable to render to GLX pixmaps. NOTES
glXCreateNewContext is available only if the GLX version is 1.3 or greater. If the GLX version is 1.1 or 1.0, the GL version must be 1.0. If the GLX version is 1.2, then the GL version must be 1.1. If the GLX version is 1.3, then the GL version must be 1.2. ERRORS
NULL is returned if execution fails on the client side. GLXBadContext is generated if render_type is not a GLX context and is not NULL. GLXBadFBConfig is generated if config is not a valid GLXFBConfig. BadMatch is generated if the context to be created would not share the address space or the screen of the context specified by render_type. BadAlloc is generated if the server does not have enough resources to allocate the new context. BadValue is generated if config is not a valid visual (for example, if a particular GLX implementation does not support it). SEE ALSO
glXChooseFBConfig(), glXCreateContext(), glXDestroyContext(), glXGetFBConfigs(), glXGetFBConfigAttrib(), glXIsDirect(), glXMakeContextCurrent() COPYRIGHT
Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see AUTHORS 06/10/2014 GLXCREATENEWCONTEXT(3G)
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