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glXCreateGLXPixmap - create an off-screen GLX rendering area
GLXPixmap
glXCreateGLXPixmap( Display *dpy,
XVisualInfo *vis,
Pixmap pixmap )
eqn not supported
- dpy
- Specifies the connection to the X server.
- vis
- Specifies the visual that defines the structure of the rendering area.
It is a pointer to an XVisualInfo structure, not a visual ID or a pointer
to a Visual.
- pixmap
- Specifies the X pixmap that will be used as the front
left color buffer of the off-screen rendering area.
glXCreateGLXPixmap
creates an off-screen rendering area and returns its XID. Any GLX rendering
context that was created with respect to vis can be used to render into
this off-screen area. Use glXMakeCurrent to associate the rendering area
with a GLX rendering context.
The X pixmap identified by pixmap is used
as the front left buffer of the resulting off-screen rendering area. All
other buffers specified by vis, including color buffers other than the
front left buffer, are created without externally visible names. GLX pixmaps
with double-buffering are supported. However, glXSwapBuffers is ignored by
these pixmaps.
Some implementations may not support GLX pixmaps with direct
rendering contexts.
XVisualInfo is defined in Xutil.h. It is a structure
that includes visual, visualID, screen, and depth elements.
BadMatch
is generated if the depth of pixmap does not match the depth value reported
by core X11 for vis, or if pixmap was not created with respect to the same
screen as vis.
BadValue is generated if vis is not a valid XVisualInfo pointer
(for example, if a particular GLX implementation does not support this
visual).
BadPixmap is generated if pixmap is not a valid pixmap.
BadAlloc
is generated if the server cannot allocate the GLX pixmap.
glXCreateContext,
glXIsDirect, glXMakeCurrent
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