/* Copyright (C) 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 is not affiliated with the Free Software Foundation or
  the GNU Project.  GNU Ghostscript, as distributed by Aladdin Enterprises,
  does not depend on any other GNU software.
*/

/*$Id: gscpixel.c,v 1.1.1.1 1999/02/22 03:04:39 scottc Exp $ */
/* DevicePixel color space and operation definition */
#include "gx.h"
#include "gserrors.h"
#include "gsrefct.h"
#include "gxcspace.h"
#include "gscpixel.h"
#include "gxdevice.h"

/* Define the DevicePixel color space type. */
private cs_proc_restrict_color(gx_restrict_DevicePixel);
private cs_proc_remap_concrete_color(gx_remap_concrete_DevicePixel);
private cs_proc_concretize_color(gx_concretize_DevicePixel);
private const gs_color_space_type gs_color_space_type_DevicePixel = {
    gs_color_space_index_DevicePixel, true, false,
    &st_base_color_space, gx_num_components_1,
    gx_no_base_space,
    gx_init_paint_1, gx_restrict_DevicePixel,
    gx_same_concrete_space,
    gx_concretize_DevicePixel, gx_remap_concrete_DevicePixel,
    gx_default_remap_color, gx_no_install_cspace,
    gx_no_adjust_cspace_count, gx_no_adjust_color_count
};

/* Create a DevicePixel color space. */
void
gs_cs_init_DevicePixel(gs_color_space * pcs, int depth)
{
    pcs->type = &gs_color_space_type_DevicePixel;
    pcs->params.pixel.depth = depth;
}

/* ------ Internal routines ------ */

/* Force a DevicePixel color into legal range. */
private void
gx_restrict_DevicePixel(gs_client_color * pcc, const gs_color_space * pcs)
{
    /****** NOT ENOUGH BITS IN float OR frac ******/
    floatp pixel = pcc->paint.values[0];
    ulong max_value = (1L << pcs->params.pixel.depth) - 1;

    pcc->paint.values[0] = (pixel < 0 ? 0 : min(pixel, max_value));
}


/* Remap a DevicePixel color. */

private int
gx_concretize_DevicePixel(const gs_client_color * pc, const gs_color_space * pcs,
			  frac * pconc, const gs_imager_state * pis)
{
    /****** NOT ENOUGH BITS IN float OR frac ******/
    pconc[0] = (frac) (ulong) pc->paint.values[0];
    return 0;
}

private int
gx_remap_concrete_DevicePixel(const frac * pconc,
	gx_device_color * pdc, const gs_imager_state * pis, gx_device * dev,
			      gs_color_select_t select)
{
    color_set_pure(pdc, pconc[0] & ((1 << dev->color_info.depth) - 1));
    return 0;
}
