/* Copyright (C) 1993, 1994, 1996, 1997, 1998 Aladdin Enterprises.  All rights reserved.

   This file is part of Aladdin Ghostscript.

   Aladdin 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 Ghostscript Free Public
   License (the "License") for full details.

   Every copy of Aladdin 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 Aladdin 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: zcolor1.c $ */
/* Level 1 extended color operators */
#include "ghost.h"
#include "oper.h"
#include "estack.h"
#include "ialloc.h"
#include "igstate.h"
#include "iutil.h"
#include "store.h"
#include "gxfixed.h"
#include "gxmatrix.h"
#include "gzstate.h"
#include "gxdevice.h"
#include "gxcmap.h"
#include "gscolor1.h"
#include "gxcspace.h"
#include "icolor.h"
#include "iimage.h"

/* - currentblackgeneration <proc> */
private int
zcurrentblackgeneration(register os_ptr op)
{
    push(1);
    *op = istate->black_generation;
    return 0;
}

/* - currentcmykcolor <cyan> <magenta> <yellow> <black> */
private int
zcurrentcmykcolor(register os_ptr op)
{
    float par[4];

    gs_currentcmykcolor(igs, par);
    push(4);
    make_floats(op - 3, par, 4);
    return 0;
}

/* - currentcolortransfer <redproc> <greenproc> <blueproc> <grayproc> */
private int
zcurrentcolortransfer(register os_ptr op)
{
    push(4);
    op[-3] = istate->transfer_procs.colored.red;
    op[-2] = istate->transfer_procs.colored.green;
    op[-1] = istate->transfer_procs.colored.blue;
    *op = istate->transfer_procs.colored.gray;
    return 0;
}

/* - currentundercolorremoval <proc> */
private int
zcurrentundercolorremoval(register os_ptr op)
{
    push(1);
    *op = istate->undercolor_removal;
    return 0;
}

/* <proc> setblackgeneration - */
private int
zsetblackgeneration(register os_ptr op)
{
    int code;

    check_proc(*op);
    check_ostack(zcolor_remap_one_ostack - 1);
    check_estack(1 + zcolor_remap_one_estack);
    code = gs_setblackgeneration_remap(igs, gs_mapped_transfer, false);
    if (code < 0)
	return code;
    istate->black_generation = *op;
    pop(1);
    op--;
    push_op_estack(zcolor_remap_color);
    return zcolor_remap_one(&istate->black_generation, op,
			    igs->black_generation, igs,
			    zcolor_remap_one_finish);
}

/* <cyan> <magenta> <yellow> <black> setcmykcolor - */
private int
zsetcmykcolor(register os_ptr op)
{
    double par[4];
    int code;

    if ((code = num_params(op, 4, par)) < 0 ||
	(code = gs_setcmykcolor(igs, par[0], par[1], par[2], par[3])) < 0
	)
	return code;
    make_null(&istate->colorspace.array);
    pop(4);
    return 0;
}

/* <redproc> <greenproc> <blueproc> <grayproc> setcolortransfer - */
private int
zsetcolortransfer(register os_ptr op)
{
    int code;

    check_proc(op[-3]);
    check_proc(op[-2]);
    check_proc(op[-1]);
    check_proc(*op);
    check_ostack(zcolor_remap_one_ostack * 4 - 4);
    check_estack(1 + zcolor_remap_one_estack * 4);
    istate->transfer_procs.colored.red = op[-3];
    istate->transfer_procs.colored.green = op[-2];
    istate->transfer_procs.colored.blue = op[-1];
    istate->transfer_procs.colored.gray = *op;
    if ((code = gs_setcolortransfer_remap(igs,
				     gs_mapped_transfer, gs_mapped_transfer,
				     gs_mapped_transfer, gs_mapped_transfer,
					  false)) < 0
	)
	return code;
    /* Use osp rather than op here, because zcolor_remap_one pushes. */
    pop(4);
    op -= 4;
    push_op_estack(zcolor_reset_transfer);
    if ((code = zcolor_remap_one(&istate->transfer_procs.colored.red,
				 osp, igs->set_transfer.colored.red, igs,
				 zcolor_remap_one_finish)) < 0 ||
	(code = zcolor_remap_one(&istate->transfer_procs.colored.green,
				 osp, igs->set_transfer.colored.green, igs,
				 zcolor_remap_one_finish)) < 0 ||
	(code = zcolor_remap_one(&istate->transfer_procs.colored.blue,
				 osp, igs->set_transfer.colored.blue, igs,
				 zcolor_remap_one_finish)) < 0
	)
	return code;
    return zcolor_remap_one(&istate->transfer_procs.colored.gray,
			    osp, igs->set_transfer.colored.gray, igs,
			    zcolor_remap_one_finish);
}

/* <proc> setundercolorremoval - */
private int
zsetundercolorremoval(register os_ptr op)
{
    int code;

    check_proc(*op);
    check_ostack(zcolor_remap_one_ostack - 1);
    check_estack(1 + zcolor_remap_one_estack);
    code = gs_setundercolorremoval_remap(igs, gs_mapped_transfer, false);
    if (code < 0)
	return code;
    istate->undercolor_removal = *op;
    pop(1);
    op--;
    push_op_estack(zcolor_remap_color);
    return zcolor_remap_one(&istate->undercolor_removal, op,
			    igs->undercolor_removal, igs,
			    zcolor_remap_one_signed_finish);
}

/* <width> <height> <bits/comp> <matrix> */
/*      <datasrc_0> ... <datasrc_ncomp-1> true <ncomp> colorimage - */
/*      <datasrc> false <ncomp> colorimage - */
int zimage_multiple(P2(os_ptr op, bool has_alpha));
private int
zcolorimage(register os_ptr op)
{
    return zimage_multiple(op, false);
}
/* We export zimage_multiple for alphaimage. */
int
zimage_multiple(os_ptr op, bool has_alpha)
{
    int spp;			/* samples per pixel */
    int npop = 7;
    os_ptr procp = op - 2;
    const gs_color_space *pcs;
    bool multi = false;

    check_int_leu(*op, 4);	/* ncolors */
    check_type(op[-1], t_boolean);	/* multiproc */
    switch ((spp = (int)(op->value.intval))) {
	case 1:
	    pcs = gs_cspace_DeviceGray((const gs_imager_state *)igs);
	    break;
	case 3:
	    pcs = gs_cspace_DeviceRGB((const gs_imager_state *)igs);
	    goto color;
	case 4:
	    pcs = gs_cspace_DeviceCMYK((const gs_imager_state *)igs);
color:
	    if (op[-1].value.boolval) {	/* planar format */
		if (has_alpha)
		    ++spp;
		npop += spp - 1;
		procp -= spp - 1;
		multi = true;
	    }
	    break;
	default:
	    return_error(e_rangecheck);
    }
    return zimage_opaque_setup(procp, multi,
		    (has_alpha ? gs_image_alpha_last : gs_image_alpha_none),
			       pcs, npop);
}

/* ------ Initialization procedure ------ */

const op_def zcolor1_op_defs[] =
{
    {"0currentblackgeneration", zcurrentblackgeneration},
    {"0currentcmykcolor", zcurrentcmykcolor},
    {"0currentcolortransfer", zcurrentcolortransfer},
    {"0currentundercolorremoval", zcurrentundercolorremoval},
    {"1setblackgeneration", zsetblackgeneration},
    {"4setcmykcolor", zsetcmykcolor},
    {"4setcolortransfer", zsetcolortransfer},
    {"1setundercolorremoval", zsetundercolorremoval},
    {"7colorimage", zcolorimage},
    op_def_end(0)
};
