/*
 *        flats.cc
 *        AYM 1998-??-??
 */


/*
This file is part of Yadex.

Yadex incorporates code from DEU 5.21 that was put in the public domain in
1994 by Raphaël Quinet and Brendon Wyber.

The rest of Yadex is Copyright © 1997-2003 André Majorel and others.

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.

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, USA.
*/


#include "yadex.h"
#ifdef Y_X11
#include <X11/Xlib.h>
#endif
#include "flats.h"
#include "gfx.h"
#include "img.h"
#include "levels.h"
#include "lists.h"
#include "sticker.h"
#include "wadfile.h"
#include "wads.h"


/*
   choose a floor or ceiling texture
   FIXME the <list> and <listsize> parameters are ignored since 1999-07-10.
*/

void ChooseFloorTexture(int x0, int y0, const char *prompt, int listsize,
                        char **list, char *name)
{
    (void) list;
    (void) listsize;
    // Build a list of char *, for InputNameFromListWithFunc()'s sake
    char **flat_names = (char **) GetMemory(NumFTexture * sizeof *flat_names);
    for (size_t n = 0; n < NumFTexture; n++)
        flat_names[n] = flat_list[n].name;

    InputNameFromListWithFunc(x0, y0, prompt, (size_t) NumFTexture,
                              flat_names, 5, name, 64, 64,
                              DisplayFloorTexture);

    FreeMemory(flat_names);
}


/*
 *        flat_list_entry_match
 *        Function used by bsearch() to locate a particular 
 *        flat in the FTexture.
 */
static int flat_list_entry_match(const void *key, const void *flat_list_entry)
{
    return y_strnicmp((const char *) key,
                      ((const flat_list_entry_t *) flat_list_entry)->name,
                      WAD_FLAT_NAME);
}


/*
   display a floor or ceiling texture at coords c->x0, c->y0
   and not beyond c->x1, c->y1
*/

void DisplayFloorTexture(hookfunc_comm_t * c)
{
    c->width = DOOM_FLAT_WIDTH;        // Big deal !
    c->height = DOOM_FLAT_HEIGHT;
    c->flags = HOOK_SIZE_VALID;

    flat_list_entry_t *flat = (flat_list_entry_t *)
        bsearch(c->name, flat_list, NumFTexture, sizeof *flat_list,
                flat_list_entry_match);
    if (flat == 0)                // Not found in list
    {
        push_colour(WINBG);
        DrawScreenBox(c->x0, c->y0, c->x1, c->y1);
        set_colour(WINFG_DIM);
        DrawScreenLine(c->x0, c->y0, c->x1, c->y1);
        DrawScreenLine(c->x0, c->y1, c->x1, c->y0);
        pop_colour();
        return;
    }
    c->lump_loc.wad = flat->wadfile;
    c->lump_loc.ofs = flat->offset;
    c->lump_loc.len = DOOM_FLAT_WIDTH * DOOM_FLAT_HEIGHT;        // Sorry.
    c->flags |= HOOK_LOC_VALID;
    const Wad_file *wadfile = flat->wadfile;
    wadfile->seek(flat->offset);
    if (wadfile->error())
    {
        warn("%s: can't seek to %lXh\n",
             wadfile->pathname(), (unsigned long) flat->offset);
        warn("%.8s: seek error\n", c->name);
    }

    c->img.resize(c->width, c->height);
    c->img.set_opaque(true);
    long nbytes = (long) c->width * c->height;
    wadfile->read_bytes(c->img.wbuf(), nbytes);
    if (wadfile->error())
    {
        warn("%s: read error\n", wadfile->where());
        warn("%.8s: short read\n", c->name);
    }
    Sticker sticker(c->img, true);        // Use opaque because it's faster
    sticker.draw(drw, 't', c->x0, c->y0);

    c->disp_x0 = c->x0;
    c->disp_y0 = c->y0;
    c->disp_x1 = c->x1;
    c->disp_y1 = c->y1;

    c->flags |= HOOK_DRAWN;
}


/*
 *        display_flat_depressed
 *        Display a flat inside a hollow box
 */
void display_flat_depressed(hookfunc_comm_t * c)
{
    draw_box_border(c->x0, c->y0,
                    c->x1 - c->x0 + 1,
                    c->y1 - c->y0 + 1,
                    HOLLOW_BORDER, 0);

    c->x0 += HOLLOW_BORDER;
    c->y0 += HOLLOW_BORDER;
    c->x1 -= HOLLOW_BORDER;
    c->y1 -= HOLLOW_BORDER;

    DisplayFloorTexture(c);

    c->x0 -= HOLLOW_BORDER;
    c->y0 -= HOLLOW_BORDER;
    c->x1 += HOLLOW_BORDER;
    c->y1 += HOLLOW_BORDER;
}