/* Copyright (C) 1992, 1993, 1997, 1998 Aladdin Enterprises.  All rights reserved.
  
  This file is part of GNU Ghostscript.
  
  GNU Ghostscript is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY.  No author or distributor accepts responsibility
  to anyone for the consequences of using it or for whether it serves any
  particular purpose or works at all, unless he says so in writing.  Refer
  to the GNU General Public License for full details.
  
  Everyone is granted permission to copy, modify and redistribute GNU
  Ghostscript, but only under the conditions described in the GNU General
  Public License.  A copy of this license is supposed to have been given
  to you along with GNU Ghostscript so you can know your rights and
  responsibilities.  It should be in a file named COPYING.  Among other
  things, the copyright notice and this notice must be preserved on all
  copies.
  
  Aladdin Enterprises supports the work of the GNU Project, but is not
  affiliated with the Free Software Foundation or the GNU Project.  GNU
  Ghostscript, as distributed by Aladdin Enterprises, does not require any
  GNU software to build or run it.
*/

/*$Id: gscolor2.h $ */
/* Client interface to Level 2 color facilities */
/* (requires gscspace.h, gsmatrix.h) */

#ifndef gscolor2_INCLUDED
#  define gscolor2_INCLUDED

#include "gsptype1.h"

/* ---------------- Graphics state ---------------- */

/*
 * Note that setcolorspace and setcolor copy the (top level of) their
 * structure argument, so if the client allocated it on the heap, the
 * client should free it after setting it in the graphics state.
 */

/* General color routines */
const gs_color_space *gs_currentcolorspace(P1(const gs_state *));
int gs_setcolorspace(P2(gs_state *, gs_color_space *));
const gs_client_color *gs_currentcolor(P1(const gs_state *));
int gs_setcolor(P2(gs_state *, const gs_client_color *));

/* CIE-specific routines */
#ifndef gs_cie_render_DEFINED
#  define gs_cie_render_DEFINED
typedef struct gs_cie_render_s gs_cie_render;
#endif
const gs_cie_render *gs_currentcolorrendering(P1(const gs_state *));
int gs_setcolorrendering(P2(gs_state *, gs_cie_render *));

/* ---------------- Indexed color space ---------------- */

/*
 * Indexed color spaces.
 *
 * If the color space will use a procedure rather than a byte table,
 * ptbl should be set to 0.
 *
 * Unlike most of the other color space constructors, this one initializes
 * some of the fields of the colorspace. In the case in which a string table
 * is used for mapping, it initializes the entire structure. Note that the
 * client is responsible for the table memory in that case; the color space
 * will not free it when the color space itself is released.
 *
 * For the case of an indexed color space based on a procedure, a default
 * procedure will be provided that simply echoes the color values already in
 * the palette; the client may override these procedures by use of
 * gs_cspace_indexed_set_proc. If the client wishes to insert values into
 * the palette, it should do so by using gs_cspace_indexed_value_array, and
 * directly inserting the desired values into the array.
 *
 * If the client does insert values into the palette directly, the default
 * procedures provided by the client are fairly efficient, and there are
 * few instances in which the client would need to replace them.
 */
extern int gs_cspace_build_Indexed(
				      gs_color_space ** ppcspace,
				      const gs_color_space * pbase_cspace,
				      uint num_entries,
				      const gs_const_string * ptbl,
				      gs_memory_t * pmem
);

/* Return the number of entries in the palette of an indexed color space. */
extern int gs_cspace_indexed_num_entries(P1(
					       const gs_color_space * pcspace
					 ));

/* In the case of a procedure-based indexed color space, get a pointer to */
/* the array of cached values. */
extern float *gs_cspace_indexed_value_array(P1(
					      const gs_color_space * pcspace
					    ));

/* Set the lookup procedure to be used for an Indexed color space. */
extern int gs_cspace_indexed_set_proc(P2(
					    gs_color_space * pcspace,
		   int (*proc) (P3(const gs_indexed_params *, int, float *))
				      ));

#endif /* gscolor2_INCLUDED */
