/* 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 supports the work of the GNU Project, but is not
  affiliated with the Free Software Foundation or the GNU Project.  GNU
  Ghostscript, as distributed by Aladdin Enterprises, does not require any
  GNU software to build or run it.
*/

/*$Id: zdps.c $ */
/* Display PostScript extensions */
#include "ghost.h"
#include "oper.h"
#include "gsstate.h"
#include "gsdps.h"
#include "gsimage.h"
#include "gsiparm2.h"
#include "gxfixed.h"		/* for gxpath.h */
#include "gxpath.h"
#include "btoken.h"		/* for user_names_p */
#include "idict.h"
#include "idparam.h"
#include "igstate.h"
#include "iname.h"
#include "store.h"

/* Import the procedure for constructing user paths. */
extern int make_upath(P4(ref *, const gs_state *, gx_path *, bool));

/* ------ Graphics state ------ */

/* <screen_index> <x> <y> .setscreenphase - */
private int
zsetscreenphase(register os_ptr op)
{
    int code;
    long x, y;

    check_type(op[-2], t_integer);
    check_type(op[-1], t_integer);
    check_type(*op, t_integer);
    x = op[-1].value.intval;
    y = op->value.intval;
    if (x != (int)x || y != (int)y ||
	op[-2].value.intval < -1 ||
	op[-2].value.intval >= gs_color_select_count
	)
	return_error(e_rangecheck);
    code = gs_setscreenphase(igs, (int)x, (int)y,
			     (gs_color_select_t) op[-2].value.intval);
    if (code >= 0)
	pop(3);
    return code;
}

/* <screen_index> .currentscreenphase <x> <y> */
private int
zcurrentscreenphase(register os_ptr op)
{
    gs_int_point phase;
    int code;

    check_type(*op, t_integer);
    if (op->value.intval < -1 ||
	op->value.intval >= gs_color_select_count
	)
	return_error(e_rangecheck);
    code = gs_currentscreenphase(igs, &phase,
				 (gs_color_select_t)op->value.intval);
    if (code < 0)
	return code;
    push(1);
    make_int(op - 1, phase.x);
    make_int(op, phase.y);
    return 0;
}

/* ------ Device-source images ------ */

/* Process an image that has no explicit source data. */
/* We export this for composite images. */
int
process_non_source_image(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;
}

/* <dict> .image2 - */
private int
zimage2(register os_ptr op)
{
    int code;

    check_type(*op, t_dictionary);
    check_dict_read(*op);
    {
	gs_image2_t image;
	ref *pDataSource;

	gs_image2_t_init(&image);
	if ((code = dict_matrix_param(op, "ImageMatrix",
				      &image.ImageMatrix)) < 0 ||
	    (code = dict_find_string(op, "DataSource", &pDataSource)) < 0 ||
	    (code = dict_float_param(op, "XOrigin", 0.0,
				     &image.XOrigin)) != 0 ||
	    (code = dict_float_param(op, "YOrigin", 0.0,
				     &image.YOrigin)) != 0 ||
	    (code = dict_float_param(op, "Width", 0.0,
				     &image.Width)) != 0 ||
	    image.Width <= 0 ||
	    (code = dict_float_param(op, "Height", 0.0,
				     &image.Height)) != 0 ||
	    image.Height <= 0 ||
	    (code = dict_bool_param(op, "PixelCopy", false,
				    &image.PixelCopy)) < 0
	    )
	    return (code < 0 ? code : gs_note_error(e_rangecheck));
	check_stype(*pDataSource, st_igstate_obj);
	image.DataSource = igstate_ptr(pDataSource);
	{
	    ref *ignoref;

	    if (dict_find_string(op, "UnpaintedPath", &ignoref) > 0) {
		check_dict_write(*op);
		image.UnpaintedPath = gx_path_alloc(imemory,
						    ".image2 UnpaintedPath");
		if (image.UnpaintedPath == 0)
		    return_error(e_VMerror);
	    } else
		image.UnpaintedPath = 0;
	}
	code = process_non_source_image((const gs_image_common_t *)&image,
					".image2");
	if (image.UnpaintedPath) {
	    ref rupath;

	    if (code < 0)
		return code;
	    if (gx_path_is_null(image.UnpaintedPath))
		make_null(&rupath);
	    else
		code = make_upath(&rupath, igs, image.UnpaintedPath, false);
	    gx_path_free(image.UnpaintedPath, ".image2 UnpaintedPath");
	    if (code < 0)
		return code;
	    code = dict_put_string(op, "UnpaintedPath", &rupath);
	}
    }
    if (code >= 0)
	pop(1);
    return code;
}

/* ------ View clipping ------ */

/* - viewclip - */
private int
zviewclip(register os_ptr op)
{
    return gs_viewclip(igs);
}

/* - eoviewclip - */
private int
zeoviewclip(register os_ptr op)
{
    return gs_eoviewclip(igs);
}

/* - initviewclip - */
private int
zinitviewclip(register os_ptr op)
{
    return gs_initviewclip(igs);
}

/* - viewclippath - */
private int
zviewclippath(register os_ptr op)
{
    return gs_viewclippath(igs);
}

/* ------ User names ------ */

/* <index> <name> defineusername - */
private int
zdefineusername(register os_ptr op)
{
    ref uname;

    check_int_ltu(op[-1], max_array_size);
    check_type(*op, t_name);
    if (array_get(user_names_p, op[-1].value.intval, &uname) >= 0) {
	switch (r_type(&uname)) {
	    case t_null:
		break;
	    case t_name:
		if (name_eq(&uname, op))
		    goto ret;
		/* falls through */
	    default:
		return_error(e_invalidaccess);
	}
    } else {			/* Expand the array. */
	ref new_array;
	uint old_size = r_size(user_names_p);
	uint new_size = (uint) op[-1].value.intval + 1;

	if (new_size < 100)
	    new_size = 100;
	else if (new_size > max_array_size / 2)
	    new_size = max_array_size;
	else if (new_size >> 1 < old_size)
	    new_size = (old_size > max_array_size / 2 ? max_array_size :
			old_size << 1);
	else
	    new_size <<= 1;
	/* The user name array is always allocated in system VM, */
	/* because it must be immune to save/restore. */
	{
	    uint save_space = icurrent_space;
	    int code;

	    ialloc_set_space(idmemory, avm_system);
	    code = ialloc_ref_array(&new_array, a_all, new_size,
				    "defineusername(new)");
	    if (code < 0) {
		ialloc_set_space(idmemory, save_space);
		return code;
	    }
	    refcpy_to_new(new_array.value.refs, user_names_p->value.refs,
			  old_size);
	    refset_null(new_array.value.refs + old_size,
			new_size - old_size);
	    ifree_ref_array(user_names_p, "defineusername(old)");
	    ialloc_set_space(idmemory, save_space);
	}
	ref_assign(user_names_p, &new_array);
    }
    ref_assign(user_names_p->value.refs + op[-1].value.intval, op);
  ret:pop(2);
    return 0;
}

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

const op_def zdps_op_defs[] =
{
		/* Graphics state */
    {"1.currentscreenphase", zcurrentscreenphase},
    {"3.setscreenphase", zsetscreenphase},
		/* Device-source images */
    {"1.image2", zimage2},
		/* View clipping */
    {"0eoviewclip", zeoviewclip},
    {"0initviewclip", zinitviewclip},
    {"0viewclip", zviewclip},
    {"0viewclippath", zviewclippath},
		/* User names */
    {"2defineusername", zdefineusername},
    op_def_end(0)
};
