libggibuf : An extension to LibGGI handling auxiliary buffers
LibGGIBuf is an extension to LibGGI which adds functionality pertaining to ancilary buffers, e.g. Alpha and Z buffers. LibGGI is a graphics library developed by the GGI Project.
In addition to providing some internal support infrastructurefor other extensions which use ancilary buffers, LibBuf can overload a normal LibGGI visual such that normal LibGGI drawing operations can do things like perform Alpha blends and Z clipping.
LibGGIBuf supports acceleration of graphics primitives where possible, but also provides a fallback mechanism which provides emulation on all supported LibGGI visuals.
The following outlines the environment variables, intended for the user, which affect the behaviour of LibGGIBuf:
The debugging level for LibGGIBuf:
You may also bitwise-or any of the following together:
The debugging output can be quite verbose and in most cases you should redirect stderr so that it does not interfere with your program's output.
Turn on synchronous debugging output, flushing the output buffers before returning from GGIDPRINT calls.