/* Copyright (C) 1993, 1994, 1996 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.
*/

/* zcolor1.c */
/* Level 1 extended color operators */
#include "ghost.h"
#include "errors.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_reals(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)
{	float 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> */
/*	true <datasrc_0> ... <datasrc_ncomp-1> <ncomp> colorimage - */
/*	false <datasrc> <ncomp> colorimage - */
private int
zcolorimage(register os_ptr op)
{	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_color_space_DeviceGray();
		break;
	case 3:
		pcs = gs_color_space_DeviceRGB();
		goto color;
	case 4:
		pcs = gs_color_space_DeviceCMYK();
color:		if ( op[-1].value.boolval )	/* planar format */
		  { npop += spp - 1;
		    procp -= spp - 1,
		    multi = true;
		  }
		break;
	default:
		return_error(e_rangecheck);
	}
	return zimage_opaque_setup(procp, multi, pcs, npop);
}

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

BEGIN_OP_DEFS(zcolor1_op_defs) {
	{"0currentblackgeneration", zcurrentblackgeneration},
	{"0currentcmykcolor", zcurrentcmykcolor},
	{"0currentcolortransfer", zcurrentcolortransfer},
	{"0currentundercolorremoval", zcurrentundercolorremoval},
	{"1setblackgeneration", zsetblackgeneration},
	{"4setcmykcolor", zsetcmykcolor},
	{"4setcolortransfer", zsetcolortransfer},
	{"1setundercolorremoval", zsetundercolorremoval},
	{"7colorimage", zcolorimage},
END_OP_DEFS(0) }
