glXGetCurrentReadDrawable(3G) OpenGL Reference - GLX
glXGetCurrentReadDrawable - return the current drawable
GLXDrawable glXGetCurrentReadDrawable( void )
glXGetCurrentReadDrawable returns the current read drawable, as specified
by read parameter of glXMakeContextCurrent. If there is no current
drawable, None is returned.
glXGetCurrentReadDrawable returns client-side information. It does not
make a round-trip to the server.
glXGetCurrentReadDrawable is only supported if the GLX version is 1.3 or
greater.
glXGetCurrentContext, glXGetCurrentDisplay, glXGetCurrentDrawable,
glXMakeContextCurrent
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