/* Copyright (C) 1992, 2000 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.
*/

/*$RCSfile: zimage2.c,v $ $Revision: 1.3.2.2 $ */
/* image operator extensions for Level 2 PostScript */
#include "math_.h"
#include "memory_.h"
#include "ghost.h"
#include "oper.h"
#include "gscolor.h"
#include "gscspace.h"
#include "gscolor2.h"
#include "gsmatrix.h"
#include "gsimage.h"
#include "gxfixed.h"
#include "idict.h"
#include "idparam.h"
#include "iimage.h"
#include "iimage2.h"
#include "ilevel.h"
#include "igstate.h"		/* for igs */

/* Extract and check the parameters for a gs_data_image_t. */
int
data_image_params(const ref *op, gs_data_image_t *pim,
		  image_params *pip, bool require_DataSource,
		  int num_components, int max_bits_per_component)
{
    int code;
    int decode_size;
    ref *pds;

    check_type(*op, t_dictionary);
    check_dict_read(*op);
    if ((code = dict_int_param(op, "Width", 0, max_int_in_fixed / 2,
			       -1, &pim->Width)) < 0 ||
	(code = dict_int_param(op, "Height", 0, max_int_in_fixed / 2,
			       -1, &pim->Height)) < 0 ||
	(code = dict_matrix_param(op, "ImageMatrix",
				  &pim->ImageMatrix)) < 0 ||
	(code = dict_bool_param(op, "MultipleDataSources", false,
				&pip->MultipleDataSources)) < 0 ||
	(code = dict_int_param(op, "BitsPerComponent", 1,
			       max_bits_per_component, -1,
			       &pim->BitsPerComponent)) < 0 ||
	(code = decode_size = dict_floats_param(op, "Decode",
						num_components * 2,
						&pim->Decode[0], NULL)) < 0 ||
	(code = dict_bool_param(op, "Interpolate", false,
				&pim->Interpolate)) < 0
	)
	return code;
    pip->pDecode = &pim->Decode[0];
    /* Extract and check the data sources. */
    if ((code = dict_find_string(op, "DataSource", &pds)) <= 0) {
	if (require_DataSource)
	    return (code < 0 ? code : gs_note_error(e_rangecheck));
	return 1;		/* no data source */
    }
    if (pip->MultipleDataSources) {
	long i;
        if (!r_is_array(pds))
            return_error(e_typecheck);
	if (r_size(pds) != num_components)
	    return_error(e_rangecheck);
	for (i = 0; i < num_components; ++i)
            array_get(pds, i, &pip->DataSource[i]);
    } else
	pip->DataSource[0] = *pds;
    return 0;
}

/* Extract and check the parameters for a gs_pixel_image_t. */
int
pixel_image_params(i_ctx_t *i_ctx_p, const ref *op, gs_pixel_image_t *pim,
		   image_params *pip, int max_bits_per_component)
{
    int num_components =
	gs_color_space_num_components(gs_currentcolorspace(igs));
    int code;

    if (num_components < 1)
	return_error(e_rangecheck);	/* Pattern space not allowed */
    pim->ColorSpace = gs_currentcolorspace(igs);
    code = data_image_params(op, (gs_data_image_t *) pim, pip, true,
			     num_components, max_bits_per_component);
    if (code < 0)
	return code;
    pim->format =
	(pip->MultipleDataSources ? gs_image_format_component_planar :
	 gs_image_format_chunky);
    return dict_bool_param(op, "CombineWithColor", false,
			   &pim->CombineWithColor);
}

/* <dict> .image1 - */
private int
zimage1(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    gs_image_t image;
    image_params ip;
    int code;

    gs_image_t_init(&image, gs_currentcolorspace(igs));
    code = pixel_image_params(i_ctx_p, op, (gs_pixel_image_t *)&image, &ip,
			      12);
    if (code < 0)
	return code;
    return zimage_setup(i_ctx_p, (gs_pixel_image_t *)&image, &ip.DataSource[0],
			image.CombineWithColor, 1);
}

/* <dict> .imagemask1 - */
private int
zimagemask1(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    gs_image_t image;
    image_params ip;
    int code;

    gs_image_t_init_mask_adjust(&image, false,
				gs_incachedevice(igs) != CACHE_DEVICE_NONE);
    code = data_image_params(op, (gs_data_image_t *) & image, &ip, true, 1, 1);
    if (code < 0)
	return code;
    if (ip.MultipleDataSources)
	return_error(e_rangecheck);
    return zimage_setup(i_ctx_p, (gs_pixel_image_t *)&image, &ip.DataSource[0],
			true, 1);
}

/*
 * Process an image that has no explicit source data.  This isn't used by
 * standard Level 2, but it's a very small procedure and is needed by
 * both zdps.c and zdpnext.c.
 */
int
process_non_source_image(i_ctx_t *i_ctx_p, const gs_image_common_t * pic,
			 client_name_t cname)
{
    gx_image_enum_common_t *pie;
    int code = gs_image_begin_typed(pic, igs, false /****** WRONG ******/ ,
				    &pie);

    /* We didn't pass any data, so there's nothing to clean up. */
    return code;
}

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

const op_def zimage2_l2_op_defs[] =
{
    op_def_begin_level2(),
    {"1.image1", zimage1},
    {"1.imagemask1", zimagemask1},
    op_def_end(0)
};
