glXCreatePbuffer — create an off-screen rendering area
|const int *||attrib_list|
Specifies the connection to the X server.
Specifies a GLXFBConfig structure with the desired attributes for the window.
Specifies a list of attribute value pairs, which must be terminated with
NULL. Accepted attributes are
glXCreatePbuffer creates an off-screen rendering area and returns its XID.
Any GLX rendering context that was created with respect to
can be used to render into this window.
Use glXMakeContextCurrent to associate the rendering area with a GLX
The accepted attributes for a GLXPbuffer are:
Specify the pixel width of the requested GLXPbuffer. The default value is 0.
Specify the pixel height of the requested GLXPbuffer. The default value is 0.
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_HEIGHT, respectively. Use glXQueryDrawable to
retrieve the dimensions of the allocated pixel buffer. The default value is
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
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.
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.
BadAlloc is generated if there are insufficient resources to
allocate the requested GLXPbuffer.
GLXBadFBConfig is generated if
config is not a valid
BadMatch is generated if
config does not support rendering to
pixel buffers (e.g.,
GLX_DRAWABLE_TYPE does not contain
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