/* Copyright (C) 1992, 2000 Aladdin Enterprises.  All rights reserved.
  
  This software is provided AS-IS with no warranty, either express or
  implied.
  
  This software is distributed under license and may not be copied,
  modified or distributed except as expressly authorized under the terms
  of the license contained in the file LICENSE in this distribution.
  
  For more information about licensing, please refer to
  http://www.ghostscript.com/licensing/. For information on
  commercial licensing, go to http://www.artifex.com/licensing/ or
  contact Artifex Software, Inc., 101 Lucas Valley Road #110,
  San Rafael, CA  94903, U.S.A., +1(415)492-9861.
*/

/*$Id: zimage2.c,v 1.3 2002/04/23 11:58:48 easysw Exp $ */
/* 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)
};
