/* Copyright (C) 2001-2006 Artifex Software, Inc.
   All Rights Reserved.
  
   This software is provided AS-IS with no warranty, either express or
   implied.

   This software is distributed under license and may not be copied, modified
   or distributed except as expressly authorized under the terms of that
   license.  Refer to licensing information at http://www.artifex.com/
   or contact Artifex Software, Inc.,  7 Mt. Lassen Drive - Suite A-134,
   San Rafael, CA  94903, U.S.A., +1(415)492-9861, for further information.
*/

/* $Id: gxtmap.h 8022 2007-06-05 22:23:38Z giles $ */
/* Definition of transfer mapping function */
/* (also used for black generation and undercolor removal) */

#ifndef gxtmap_INCLUDED
#  define gxtmap_INCLUDED

/* Common definition for mapping procedures. */
/* These are used for transfer functions, black generation, */
/* and undercolor removal. */
/* gx_transfer_map should probably be renamed gx_mapping_cache.... */

/* Define an abstract type for a transfer map. */
typedef struct gx_transfer_map_s gx_transfer_map;

/*
 * Define the type of a mapping procedure.  There are two forms of this.
 * The original form passed only the transfer map itself as an argument:
 */
typedef float (*gs_mapping_proc) (floatp, const gx_transfer_map *);

/*
 * Later, we recognized that this procedure should really be a general
 * closure:
 */
typedef float (*gs_mapping_closure_proc_t) (floatp value,
					    const gx_transfer_map * pmap,
					    const void *proc_data);
typedef struct gs_mapping_closure_s {
    gs_mapping_closure_proc_t proc;
    const void *data;
} gs_mapping_closure_t;

#endif /* gxtmap_INCLUDED */
