Function back_to_glyph

src/display.c:2286–2427

* back_to_glyph() * * Use the information in the rm structure at the given position to create * a glyph of a background. * * I had to add a field in the rm structure (horizontal) so that we knew * if open doors and secret doors were horizontal or vertical. Previously, * the screen symbol had the horizontal/vertical information set at * level generation time. * * I used the 'ladder' fiel

 * variables.
 */
int
back_to_glyph(coordxy x, coordxy y)
{
    int idx, bypass_glyph = NO_GLYPH;
    struct rm *ptr = &(levl[x][y]);
    struct stairway *sway;

    switch (ptr->typ) {
    case SCORR:
    case STONE:
        idx = svl.level.flags.arboreal ? S_tree : S_stone;
        break;
    case ROOM:
        idx = S_room;
        break;
    case CORR:
        idx = (ptr->waslit || flags.lit_corridor) ? S_litcorr : S_corr;
        break;
    case SDOOR:
        if (ptr->arboreal_sdoor) {
            idx = S_tree;
            break;
        }
        FALLTHROUGH;
        /*FALLTHRU*/
    case HWALL:
    case VWALL:
    case TLCORNER:
    case TRCORNER:
    case BLCORNER:
    case BRCORNER:
    case CROSSWALL:
    case TUWALL:
    case TDWALL:
    case TLWALL:
    case TRWALL:
        idx = ptr->seenv ? wall_angle(ptr) : S_stone;
        break;
    case DOOR:
        if (ptr->doormask) {
            if (ptr->doormask & D_BROKEN)
                idx = S_ndoor;
            else if (ptr->doormask & D_ISOPEN)
                idx = (ptr->horizontal) ? S_hodoor : S_vodoor;
            else /* else is closed */
                idx = (ptr->horizontal) ? S_hcdoor : S_vcdoor;
        } else
            idx = S_ndoor;
        break;
    case IRONBARS:
        idx = S_bars;
        break;
    case TREE:
        idx = S_tree;
        break;
    case POOL:
    case MOAT:
        idx = S_pool;