/* Copyright (C) 1989, 1995, 1996, 1997 Aladdin Enterprises.  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 the license contained in the file LICENSE in this distribution.
  
  For more information about licensing, please refer to
  http://www.ghostscript.com/licensing/. For information on
  commercial licensing, go to http://www.artifex.com/licensing/ or
  contact Artifex Software, Inc., 101 Lucas Valley Road #110,
  San Rafael, CA  94903, U.S.A., +1(415)492-9861.
*/

/* $Id$ */
/* Color mapping procedures */
/* Requires gxdcolor.h. */

#ifndef gxcmap_INCLUDED
#  define gxcmap_INCLUDED

#include "gscsel.h"
#include "gxfmap.h"

#ifndef gx_device_DEFINED
#  define gx_device_DEFINED
typedef struct gx_device_s gx_device;
#endif
#ifndef gx_device_color_DEFINED
#  define gx_device_color_DEFINED
typedef struct gx_device_color_s gx_device_color;
#endif

/* Procedures for rendering colors specified by fractions. */

#define cmap_proc_gray(proc)\
  void proc(P5(frac, gx_device_color *, const gs_imager_state *,\
	       gx_device *, gs_color_select_t))
#define cmap_proc_rgb(proc)\
  void proc(P7(frac, frac, frac, gx_device_color *, const gs_imager_state *,\
	       gx_device *, gs_color_select_t))
#define cmap_proc_cmyk(proc)\
  void proc(P8(frac, frac, frac, frac, gx_device_color *,\
	       const gs_imager_state *, gx_device *, gs_color_select_t))
#define cmap_proc_rgb_alpha(proc)\
  void proc(P8(frac, frac, frac, frac, gx_device_color *,\
	       const gs_imager_state *, gx_device *, gs_color_select_t))

/* Because of a bug in the Watcom C compiler, */
/* we have to split the struct from the typedef. */
struct gx_color_map_procs_s {
    cmap_proc_gray((*map_gray));
    cmap_proc_rgb((*map_rgb));
    cmap_proc_cmyk((*map_cmyk));
    cmap_proc_rgb_alpha((*map_rgb_alpha));
};
typedef struct gx_color_map_procs_s gx_color_map_procs;

/*
 * Determine the color mapping procedures for a device.  Even though this
 * does not currently use information from the imager state, it must be
 * a virtual procedure of the state for internal reasons.
 */
const gx_color_map_procs *
    gx_get_cmap_procs(P2(const gs_imager_state *, const gx_device *));
const gx_color_map_procs *
    gx_default_get_cmap_procs(P2(const gs_imager_state *, const gx_device *));

/*
 * Set the color mapping procedures in the graphics state.  This is
 * currently only needed when switching devices, but might be used more
 * often in the future.
 */
void gx_set_cmap_procs(P2(gs_imager_state *, const gx_device *));

/* Remap a concrete (frac) gray, RGB or CMYK color. */
/* These cannot fail, and do not return a value. */
#define gx_remap_concrete_gray(cgray, pdc, pis, dev, select)\
  ((pis)->cmap_procs->map_gray)(cgray, pdc, pis, dev, select)
#define gx_remap_concrete_rgb(cr, cg, cb, pdc, pis, dev, select)\
  ((pis)->cmap_procs->map_rgb)(cr, cg, cb, pdc, pis, dev, select)
#define gx_remap_concrete_cmyk(cc, cm, cy, ck, pdc, pis, dev, select)\
  ((pis)->cmap_procs->map_cmyk)(cc, cm, cy, ck, pdc, pis, dev, select)
#define gx_remap_concrete_rgb_alpha(cr, cg, cb, ca, pdc, pis, dev, select)\
  ((pis)->cmap_procs->map_rgb_alpha)(cr, cg, cb, ca, pdc, pis, dev, select)

/* Map a color, with optional tracing if we are debugging. */
#include "gxcindex.h"
#include "gxcvalue.h"
gx_color_index gx_proc_map_rgb_color(P4(gx_device *,
			   gx_color_value, gx_color_value, gx_color_value));
gx_color_index gx_proc_map_rgb_alpha_color(P5(gx_device *,
	   gx_color_value, gx_color_value, gx_color_value, gx_color_value));
gx_color_index gx_proc_map_cmyk_color(P5(gx_device *,
	   gx_color_value, gx_color_value, gx_color_value, gx_color_value));
#ifdef DEBUG
/* Use procedures in gxcmap.c */
#  define gx_map_rgb_color(dev, vr, vg, vb)\
     gx_proc_map_rgb_color(dev, vr, vg, vb)
#  define gx_map_rgb_alpha_color(dev, vr, vg, vb, va)\
     gx_proc_map_rgb_alpha_color(dev, vr, vg, vb, va)
#  define gx_map_cmyk_color(dev, vc, vm, vy, vk)\
     gx_proc_map_cmyk_color(dev, vc, vm, vy, vk)
#else
#  define gx_map_rgb_color(dev, vr, vg, vb)\
     (*dev_proc(dev, map_rgb_color))(dev, vr, vg, vb)
#  define gx_map_rgb_alpha_color(dev, vr, vg, vb, va)\
     (*dev_proc(dev, map_rgb_alpha_color))(dev, vr, vg, vb, va)
#  define gx_map_cmyk_color(dev, vc, vm, vy, vk)\
     (*dev_proc(dev, map_cmyk_color))(dev, vc, vm, vy, vk)
#endif

#endif /* gxcmap_INCLUDED */