/* Copyright (C) 2001-2006 Artifex Software, Inc.
   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 that
   license.  Refer to licensing information at http://www.artifex.com/
   or contact Artifex Software, Inc.,  7 Mt. Lassen Drive - Suite A-134,
   San Rafael, CA  94903, U.S.A., +1(415)492-9861, for further information.
*/

/* $Id: zdps.c 8250 2007-09-25 13:31:24Z giles $ */
/* Display PostScript extensions */
#include "ghost.h"
#include "oper.h"
#include "gsstate.h"
#include "gsdps.h"
#include "gsimage.h"
#include "gsiparm2.h"
#include "gxalloc.h"		/* for names_array in allocator */
#include "gxfixed.h"		/* for gxpath.h */
#include "gxpath.h"
#include "btoken.h"		/* for user_names_p */
#include "iddict.h"
#include "idparam.h"
#include "igstate.h"
#include "iimage2.h"
#include "iname.h"
#include "store.h"

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

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

/* <screen_index> <x> <y> .setscreenphase - */
static int
zsetscreenphase(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    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> */
static int
zcurrentscreenphase(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    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 ------ */

/* <dict> .image2 - */
static int
zimage2(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    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(imemory, 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(i_ctx_p,
					(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(i_ctx_p, &rupath, igs, image.UnpaintedPath,
				  false);
	    gx_path_free(image.UnpaintedPath, ".image2 UnpaintedPath");
	    if (code < 0)
		return code;
	    code = idict_put_string(op, "UnpaintedPath", &rupath);
	}
    }
    if (code >= 0)
	pop(1);
    return code;
}

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

/* - viewclip - */
static int
zviewclip(i_ctx_t *i_ctx_p)
{
    return gs_viewclip(igs);
}

/* - eoviewclip - */
static int
zeoviewclip(i_ctx_t *i_ctx_p)
{
    return gs_eoviewclip(igs);
}

/* - initviewclip - */
static int
zinitviewclip(i_ctx_t *i_ctx_p)
{
    return gs_initviewclip(igs);
}

/* - viewclippath - */
static int
zviewclippath(i_ctx_t *i_ctx_p)
{
    return gs_viewclippath(igs);
}

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

/* <index> <name> defineusername - */
static int
zdefineusername(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    ref uname;

    check_int_ltu(op[-1], max_array_size);
    check_type(*op, t_name);
    if (user_names_p == 0) {
	int code = create_names_array(&user_names_p, imemory_local,
				      "defineusername");

	if (code < 0)
	    return code;
    }
    if (array_get(imemory, 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 allocated in stable local VM,
	 * because it must be immune to save/restore.
	 */
	{
	    gs_ref_memory_t *slmem =
		(gs_ref_memory_t *)gs_memory_stable(imemory_local);
	    int code;

	    code = gs_alloc_ref_array(slmem, &new_array, a_all, new_size,
				      "defineusername(new)");
	    if (code < 0)
		return code;
	    refcpy_to_new(new_array.value.refs, user_names_p->value.refs,
			  old_size, idmemory);
	    refset_null(new_array.value.refs + old_size,
			new_size - old_size);
	    if (old_size)
		gs_free_ref_array(slmem, user_names_p, "defineusername(old)");
	}
	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)
};
