/* Copyright (C) 1989, 2000 Aladdin Enterprises.  All rights reserved.
  
  This program is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License version 2
  as published by the Free Software Foundation.


  This software is provided AS-IS with no warranty, either express or
  implied. That is, this program is distributed in the hope that it will 
  be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  General Public License for more details

  You should have received a copy of the GNU General Public License along
  with this program; if not, write to the Free Software Foundation, Inc.,
  59 Temple Place, Suite 330, Boston, MA, 02111-1307.
  
  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: zdevice.c,v 1.7 2002/08/22 07:12:29 henrys Exp $ */
/* Device-related operators */
#include "string_.h"
#include "ghost.h"
#include "oper.h"
#include "ialloc.h"
#include "idict.h"
#include "igstate.h"
#include "iname.h"
#include "interp.h"
#include "iparam.h"
#include "ivmspace.h"
#include "gsmatrix.h"
#include "gsstate.h"
#include "gxdevice.h"
#include "gxgetbit.h"
#include "store.h"

/* <device> <keep_open> .copydevice2 <newdevice> */
private int
zcopydevice2(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    gx_device *new_dev;
    int code;

    check_read_type(op[-1], t_device);
    check_type(*op, t_boolean);
    code = gs_copydevice2(&new_dev, op[-1].value.pdevice, op->value.boolval,
			  imemory);
    if (code < 0)
	return code;
    new_dev->memory = imemory;
    make_tav(op - 1, t_device, icurrent_space | a_all, pdevice, new_dev);
    pop(1);
    return 0;
}

/* - currentdevice <device> */
int
zcurrentdevice(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    gx_device *dev = gs_currentdevice(igs);
    gs_ref_memory_t *mem = (gs_ref_memory_t *) dev->memory;

    push(1);
    make_tav(op, t_device,
	     (mem == 0 ? avm_foreign : imemory_space(mem)) | a_all,
	     pdevice, dev);
    return 0;
}

/* <device> .devicename <string> */
private int
zdevicename(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    const char *dname;

    check_read_type(*op, t_device);
    dname = op->value.pdevice->dname;
    make_const_string(op, avm_foreign | a_readonly, strlen(dname),
		      (const byte *)dname);
    return 0;
}

/* - .doneshowpage - */
private int
zdoneshowpage(i_ctx_t *i_ctx_p)
{
    gx_device *dev = gs_currentdevice(igs);
    gx_device *tdev = (*dev_proc(dev, get_page_device)) (dev);

    if (tdev != 0)
	tdev->ShowpageCount++;
    return 0;
}

/* - flushpage - */
int
zflushpage(i_ctx_t *i_ctx_p)
{
    return gs_flushpage(igs);
}

/* <device> <x> <y> <width> <max_height> <alpha?> <std_depth|null> <string> */
/*   .getbitsrect <height> <substring> */
private int
zgetbitsrect(i_ctx_t *i_ctx_p)
{	/*
	 * alpha? is 0 for no alpha, -1 for alpha first, 1 for alpha last.
	 * std_depth is null for native pixels, depth/component for
	 * standard color space.
	 */
    os_ptr op = osp;
    gx_device *dev;
    gs_int_rect rect;
    gs_get_bits_params_t params;
    int w, h;
    gs_get_bits_options_t options =
	GB_ALIGN_ANY | GB_RETURN_COPY | GB_OFFSET_0 | GB_RASTER_STANDARD |
	GB_PACKING_CHUNKY;
    int depth;
    uint raster;
    int num_rows;
    int code;

    check_read_type(op[-7], t_device);
    dev = op[-7].value.pdevice;
    check_int_leu(op[-6], dev->width);
    rect.p.x = op[-6].value.intval;
    check_int_leu(op[-5], dev->height);
    rect.p.y = op[-5].value.intval;
    check_int_leu(op[-4], dev->width);
    w = op[-4].value.intval;
    check_int_leu(op[-3], dev->height);
    h = op[-3].value.intval;
    check_type(op[-2], t_integer);
    /*
     * We use if/else rather than switch because the value is long,
     * which is not supported as a switch value in pre-ANSI C.
     */
    if (op[-2].value.intval == -1)
	options |= GB_ALPHA_FIRST;
    else if (op[-2].value.intval == 0)
	options |= GB_ALPHA_NONE;
    else if (op[-2].value.intval == 1)
	options |= GB_ALPHA_LAST;
    else
	return_error(e_rangecheck);
    if (r_has_type(op - 1, t_null)) {
	options |= GB_COLORS_NATIVE;
	depth = dev->color_info.depth;
    } else {
	static const gs_get_bits_options_t depths[17] = {
	    0, GB_DEPTH_1, GB_DEPTH_2, 0, GB_DEPTH_4, 0, 0, 0, GB_DEPTH_8,
	    0, 0, 0, GB_DEPTH_12, 0, 0, 0, GB_DEPTH_16
	};
	gs_get_bits_options_t depth_option;
	int std_depth;

	check_int_leu(op[-1], 16);
	std_depth = (int)op[-1].value.intval;
	depth_option = depths[std_depth];
	if (depth_option == 0)
	    return_error(e_rangecheck);
	options |= depth_option | GB_COLORS_NATIVE;
	depth = (dev->color_info.num_components +
		 (options & GB_ALPHA_NONE ? 0 : 1)) * std_depth;
    }
    raster = (w * depth + 7) >> 3;
    check_write_type(*op, t_string);
    num_rows = r_size(op) / raster;
    h = min(h, num_rows);
    if (h == 0)
	return_error(e_rangecheck);
    rect.q.x = rect.p.x + w;
    rect.q.y = rect.p.y + h;
    params.options = options;
    params.data[0] = op->value.bytes;
    code = (*dev_proc(dev, get_bits_rectangle))(dev, &rect, &params, NULL);
    if (code < 0)
	return code;
    make_int(op - 7, h);
    op[-6] = *op;
    r_set_size(op - 6, h * raster);
    pop(6);
    return 0;
}

/* <int> .getdevice <device> */
private int
zgetdevice(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    const gx_device *dev;

    check_type(*op, t_integer);
    if (op->value.intval != (int)(op->value.intval))
	return_error(e_rangecheck);	/* won't fit in an int */
    dev = gs_getdevice((int)(op->value.intval));
    if (dev == 0)		/* index out of range */
	return_error(e_rangecheck);
    /* Device prototypes are read-only; */
    /* the cast is logically unnecessary. */
    make_tav(op, t_device, avm_foreign | a_readonly, pdevice,
	     (gx_device *) dev);
    return 0;
}

/* Common functionality of zgethardwareparms & zgetdeviceparams */
private int
zget_device_params(i_ctx_t *i_ctx_p, bool is_hardware)
{
    os_ptr op = osp;
    ref rkeys;
    gx_device *dev;
    stack_param_list list;
    int code;
    ref *pmark;

    check_read_type(op[-1], t_device);
    rkeys = *op;
    dev = op[-1].value.pdevice;
    pop(1);
    stack_param_list_write(&list, &o_stack, &rkeys, iimemory);
    code = gs_get_device_or_hardware_params(dev, (gs_param_list *) & list,
					    is_hardware);
    if (code < 0) {
	/* We have to put back the top argument. */
	if (list.count > 0)
	    ref_stack_pop(&o_stack, list.count * 2 - 1);
	else
	    ref_stack_push(&o_stack, 1);
	*osp = rkeys;
	return code;
    }
    pmark = ref_stack_index(&o_stack, list.count * 2);
    make_mark(pmark);
    return 0;
}
/* <device> <key_dict|null> .getdeviceparams <mark> <name> <value> ... */
private int
zgetdeviceparams(i_ctx_t *i_ctx_p)
{
    return zget_device_params(i_ctx_p, false);
}
/* <device> <key_dict|null> .gethardwareparams <mark> <name> <value> ... */
private int
zgethardwareparams(i_ctx_t *i_ctx_p)
{
    return zget_device_params(i_ctx_p, true);
}

/* <matrix> <width> <height> <palette> <word?> makewordimagedevice <device> */
private int
zmakewordimagedevice(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    os_ptr op1 = op - 1;
    gs_matrix imat;
    gx_device *new_dev;
    const byte *colors;
    int colors_size;
    int code;

    check_int_leu(op[-3], max_uint >> 1);	/* width */
    check_int_leu(op[-2], max_uint >> 1);	/* height */
    check_type(*op, t_boolean);
    if (r_has_type(op1, t_null)) {	/* true color */
	colors = 0;
	colors_size = -24;	/* 24-bit true color */
    } else if (r_has_type(op1, t_integer)) {
	/*
	 * We use if/else rather than switch because the value is long,
	 * which is not supported as a switch value in pre-ANSI C.
	 */
	if (op1->value.intval != 16 && op1->value.intval != 24 &&
	    op1->value.intval != 32
	    )
	    return_error(e_rangecheck);
	colors = 0;
	colors_size = -op1->value.intval;
    } else {
	check_type(*op1, t_string);	/* palette */
	if (r_size(op1) > 3 * 256)
	    return_error(e_rangecheck);
	colors = op1->value.bytes;
	colors_size = r_size(op1);
    }
    if ((code = read_matrix(op - 4, &imat)) < 0)
	return code;
    /* Everything OK, create device */
    code = gs_makewordimagedevice(&new_dev, &imat,
				  (int)op[-3].value.intval,
				  (int)op[-2].value.intval,
				  colors, colors_size,
				  op->value.boolval, true, imemory);
    if (code == 0) {
	new_dev->memory = imemory;
	make_tav(op - 4, t_device, imemory_space(iimemory) | a_all,
		 pdevice, new_dev);
	pop(4);
    }
    return code;
}

/* - nulldevice - */
/* Note that nulldevice clears the current pagedevice. */
private int
znulldevice(i_ctx_t *i_ctx_p)
{
    gs_nulldevice(igs);
    clear_pagedevice(istate);
    return 0;
}

/* <num_copies> <flush_bool> .outputpage - */
private int
zoutputpage(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    int code;

    check_type(op[-1], t_integer);
    check_type(*op, t_boolean);
    code = gs_output_page(igs, (int)op[-1].value.intval,
			  op->value.boolval);
    if (code < 0)
	return code;
    pop(2);
    return 0;
}

/* <device> <policy_dict|null> <require_all> <mark> <name> <value> ... */
/*      .putdeviceparams */
/*   (on success) <device> <eraseflag> */
/*   (on failure) <device> <policy_dict|null> <require_all> <mark> */
/*       <name1> <error1> ... */
/* For a key that simply was not recognized, if require_all is true, */
/* the result will be an /undefined error; if require_all is false, */
/* the key will be ignored. */
/* Note that .putdeviceparams clears the current pagedevice. */
private int
zputdeviceparams(i_ctx_t *i_ctx_p)
{
    uint count = ref_stack_counttomark(&o_stack);
    ref *prequire_all;
    ref *ppolicy;
    ref *pdev;
    gx_device *dev;
    stack_param_list list;
    int code;
    int old_width, old_height;
    int i, dest;

    if (count == 0)
	return_error(e_unmatchedmark);
    prequire_all = ref_stack_index(&o_stack, count);
    ppolicy = ref_stack_index(&o_stack, count + 1);
    pdev = ref_stack_index(&o_stack, count + 2);
    if (pdev == 0)
	return_error(e_stackunderflow);
    check_type_only(*prequire_all, t_boolean);
    check_write_type_only(*pdev, t_device);
    dev = pdev->value.pdevice;
    code = stack_param_list_read(&list, &o_stack, 0, ppolicy,
				 prequire_all->value.boolval, iimemory);
    if (code < 0)
	return code;
    old_width = dev->width;
    old_height = dev->height;
    code = gs_putdeviceparams(dev, (gs_param_list *) & list);
    /* Check for names that were undefined or caused errors. */
    for (dest = count - 2, i = 0; i < count >> 1; i++)
	if (list.results[i] < 0) {
	    *ref_stack_index(&o_stack, dest) =
		*ref_stack_index(&o_stack, count - (i << 1) - 2);
	    gs_errorname(i_ctx_p, list.results[i],
			 ref_stack_index(&o_stack, dest - 1));
	    dest -= 2;
	}
    iparam_list_release(&list);
    if (code < 0) {		/* There were errors reported. */
	ref_stack_pop(&o_stack, dest + 1);
	return 0;
    }
    if (code > 0 || (code == 0 && (dev->width != old_width || dev->height != old_height))) {
	/*
	 * The device was open and is now closed, or its dimensions have
	 * changed.  If it was the current device, call setdevice to
	 * reinstall it and erase the page.
	 */
	/****** DOESN'T FIND ALL THE GSTATES THAT REFERENCE THE DEVICE. ******/
	if (gs_currentdevice(igs) == dev) {
	    bool was_open = dev->is_open;

	    code = gs_setdevice_no_erase(igs, dev);
	    /* If the device wasn't closed, setdevice won't erase the page. */
	    if (was_open && code >= 0)
		code = 1;
	}
    }
    if (code < 0)
	return code;
    ref_stack_pop(&o_stack, count + 1);
    make_bool(osp, code);
    clear_pagedevice(istate);
    return 0;
}

/* <device> .setdevice <eraseflag> */
/* Note that .setdevice clears the current pagedevice. */
int
zsetdevice(i_ctx_t *i_ctx_p)
{
    gx_device *dev = gs_currentdevice(igs);
    os_ptr op = osp;
    int code;

    check_write_type(*op, t_device);
    if (dev->LockSafetyParams) {	  /* do additional checking if locked  */
        if(op->value.pdevice != dev) 	  /* don't allow a different device    */
	    return_error(e_invalidaccess);
    }
    code = gs_setdevice_no_erase(igs, op->value.pdevice);
    if (code < 0)
	return code;
    make_bool(op, code != 0);	/* erase page if 1 */
    clear_pagedevice(istate);
    return code;
}

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

const op_def zdevice_op_defs[] =
{
    {"1.copydevice2", zcopydevice2},
    {"0currentdevice", zcurrentdevice},
    {"1.devicename", zdevicename},
    {"0.doneshowpage", zdoneshowpage},
    {"0flushpage", zflushpage},
    {"7.getbitsrect", zgetbitsrect},
    {"1.getdevice", zgetdevice},
    {"2.getdeviceparams", zgetdeviceparams},
    {"2.gethardwareparams", zgethardwareparams},
    {"5makewordimagedevice", zmakewordimagedevice},
    {"0nulldevice", znulldevice},
    {"2.outputpage", zoutputpage},
    {"3.putdeviceparams", zputdeviceparams},
    {"1.setdevice", zsetdevice},
    op_def_end(0)
};
