/* Copyright (C) 1997, 1998, 1999 Aladdin Enterprises.  All rights reserved.
  
  This file is part of AFPL Ghostscript.
  
  AFPL Ghostscript is distributed with NO WARRANTY OF ANY KIND.  No author or
  distributor accepts any responsibility for the consequences of using it, or
  for whether it serves any particular purpose or works at all, unless he or
  she says so in writing.  Refer to the Aladdin Free Public License (the
  "License") for full details.
  
  Every copy of AFPL Ghostscript must include a copy of the License, normally
  in a plain ASCII text file named PUBLIC.  The License grants you the right
  to copy, modify and redistribute AFPL Ghostscript, but only under certain
  conditions described in the License.  Among other things, the License
  requires that the copyright notice and this notice be preserved on all
  copies.
*/

/*$Id$ */
/* ImageType 4 image parameter definition */

#ifndef gsiparm4_INCLUDED
#  define gsiparm4_INCLUDED

#include "gsiparam.h"

/*
 * See Section 4.3 of the Adobe PostScript Version 3010 Supplement
 * for a definition of ImageType 4 images.
 */

typedef struct gs_image4_s {
    gs_pixel_image_common;
    /*
     * If MaskColor_is_range is false, the first N elements of
     * MaskColor are sample values; if MaskColor_is_range is true,
     * the first 2*N elements are ranges of sample values.
     *
     * Currently, the largest sample values supported by the library are 12
     * bits, but eventually we want to support DevicePixel images with
     * samples up to 32 bits as well.
     */
    bool MaskColor_is_range;
    uint MaskColor[GS_IMAGE_MAX_COMPONENTS * 2];
} gs_image4_t;

#define private_st_gs_image4()	/* in gximage4.c */\
  extern_st(st_gs_pixel_image);\
  gs_private_st_suffix_add0(st_gs_image4, gs_image4_t, "gs_image4_t",\
    image4_enum_ptrs, image4_reloc_ptrs, st_gs_pixel_image)

/*
 * Initialize an ImageType 4 image.  Defaults:
 *      MaskColor_is_range = false
 */
void gs_image4_t_init(P2(gs_image4_t * pim, const gs_color_space * color_space));

#endif /* gsiparm4_INCLUDED */