glxcreatepbuffer(3g) [centos man page]
GLXCREATEPBUFFER(3G) OpenGL Manual GLXCREATEPBUFFER(3G) NAME
glXCreatePbuffer - create an off-screen rendering area C SPECIFICATION
GLXPbuffer glXCreatePbuffer(Display * dpy, GLXFBConfig config, const int * attrib_list); PARAMETERS
dpy Specifies the connection to the X server. config Specifies a GLXFBConfig structure with the desired attributes for the window. attrib_list Specifies a list of attribute value pairs, which must be terminated with None or NULL. Accepted attributes are GLX_PBUFFER_WIDTH, GLX_PBUFFER_HEIGHT, GLX_PRESERVED_CONTENTS, and GLX_LARGEST_PBUFFER. DESCRIPTION
glXCreatePbuffer creates an off-screen rendering area and returns its XID. Any GLX rendering context that was created with respect to config can be used to render into this window. Use glXMakeContextCurrent() to associate the rendering area with a GLX rendering context. The accepted attributes for a GLXPbuffer are: GLX_PBUFFER_WIDTH Specify the pixel width of the requested GLXPbuffer. The default value is 0. GLX_PBUFFER_HEIGHT Specify the pixel height of the requested GLXPbuffer. The default value is 0. GLX_LARGEST_PBUFFER Specify to obtain the largest available pixel buffer, if the requested allocation would have failed. The width and height of the allocated pixel buffer will never exceed the specified GLX_PBUFFER_WIDTH or GLX_PBUFFER_HEIGHT, respectively. Use glXQueryDrawable() to retrieve the dimensions of the allocated pixel buffer. The default value is False. GLX_PRESERVED_CONTENTS Specify if the contents of the pixel buffer should be preserved when a resource conflict occurs. If set to False, the contents of the pixel buffer may be lost at any time. If set to True, or not specified in attrib_list, then the contents of the pixel buffer will be preserved (most likely by copying the contents into main system memory from the frame buffer). In either case, the client can register (using glXSelectEvent(), to receive pixel buffer clobber events that are generated when the pbuffer contents have been preserved or damaged. GLXPbuffers contain the color and ancillary buffers specified by config. It is possible to create a pixel buffer with back buffers and to swap those buffers using glXSwapBuffers(). NOTES
glXCreatePbuffer 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. GLXPbuffers are allocated from frame buffer resources; applications should consider deallocating them when they are not in use. ERRORS
BadAlloc is generated if there are insufficient resources to allocate the requested GLXPbuffer. GLXBadFBConfig is generated if config is not a valid GLXFBConfig. BadMatch is generated if config does not support rendering to pixel buffers (e.g., GLX_DRAWABLE_TYPE does not contain GLX_PBUFFER_BIT). SEE ALSO
glXChooseFBConfig(), glXCreatePbuffer, glXMakeContextCurrent(), glXSelectEvent() COPYRIGHT
Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/. AUTHORS
opengl.org opengl.org 06/10/2014 GLXCREATEPBUFFER(3G)
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GLXCREATENEWCONTEXT(3G) OpenGL Manual GLXCREATENEWCONTEXT(3G) NAME
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 http://oss.sgi.com/projects/FreeB/. AUTHORS
opengl.org opengl.org 06/10/2014 GLXCREATENEWCONTEXT(3G)