LibGGIGCP libraries and utilities
=================================


GGI extension for color and palette
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. manpage:: 7 libggigcp


Description
-----------

LibGGIGCP is a generic color and palette management extension. It
supports conversion between different color spaces such as RGBA,
YUV, HSV and CMYK.


Environment Variables
---------------------

`GCP_DEBUG`
    The debugging level for LibGGIGCP:
    
    0 or unset
        debug output is off; debugging is off
    
    255
        all debug output is on
    
    You may also bitwise-or any of the following together:
    
    - 2 : debug core
    - 4 : debug mode setting
    - 8 : debug color handling
    - 16 : debug drawing
    - 32 : misc debugging output
    - 64 : debug dynamic library handling
    - 128 : debug event handling
    
    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.

`GCP_DEBUGSYNC`
    Turn on synchronous debugging output, flushing the output buffers
    before returning from `DPRINT` calls.

`GGI_CONFDIR`
    Override compiled-in path to global config files (Win32 only,
    but not Cygwin).

Note that the last environment variable really begin with `GGI`,
and not `GCP`.


See Also
--------

:man:`libggi(7)`