/* SCCS Id: @(#)display.c 3.1 92/10/25 */ /* Copyright (c) Dean Luick, with acknowledgements to Kevin Darcy */ /* and Dave Cohrs, 1990. */ /* NetHack may be freely redistributed. See license for details. */ /* * THE NEW DISPLAY CODE * * The old display code has been broken up into three parts: vision, display, * and drawing. Vision decides what locations can and cannot be physically * seen by the hero. Display decides _what_ is displayed at a given location. * Drawing decides _how_ to draw a monster, fountain, sword, etc. * * The display system uses information from the vision system to decide * what to draw at a given location. The routines for the vision system * can be found in vision.c and vision.h. The routines for display can * be found in this file (display.c) and display.h. The drawing routines * are part of the window port. See doc/window.doc for the drawing * interface. * * The display system deals with an abstraction called a glyph. Anything * that could possibly be displayed has a unique glyph identifier. * * What is seen on the screen is a combination of what the hero remembers * and what the hero currently sees. Objects and dungeon features (walls * doors, etc) are remembered when out of sight. Monsters and temporary * effects are not remembered. Each location on the level has an * associated glyph. This is the hero's _memory_ of what he or she has * seen there before. * * Display rules: * * If the location is in sight, display in order: * visible monsters * visible objects * known traps * background * * If the location is out of sight, display in order: * sensed monsters (telepathy) * memory * * * * Here is a list of the major routines in this file to be used externally: * * newsym * * Possibly update the screen location (x,y). This is the workhorse routine. * It is always correct --- where correct means following the in-sight/out- * of-sight rules. **Most of the code should use this routine.** This * routine updates the map and displays monsters. * * * map_background * map_object * map_trap * unmap_object * * If you absolutely must override the in-sight/out-of-sight rules, there * are two possibilities. First, you can mess with vision to force the * location in sight then use newsym(), or you can use the map_* routines. * The first has not been tried [no need] and the second is used in the * detect routines --- detect object, magic mapping, etc. The map_* * routines *change* what the hero remembers. All changes made by these * routines will be sticky --- they will survive screen redraws. Do *not* * use these for things that only temporarily change the screen. These * routines are also used directly by newsym(). unmap_object is used to * clear a remembered object when/if detection reveals it isn't there. * * * show_glyph * * This is direct (no processing in between) buffered access to the screen. * Temporary screen effects are run through this and its companion, * flush_screen(). There is yet a lower level routine, print_glyph(), * but this is unbuffered and graphic dependent (i.e. it must be surrounded * by graphic set-up and tear-down routines). Do not use print_glyph(). * * * see_monsters * see_objects * * These are only used when something affects all of the monsters or * objects. For objects, the only thing is hallucination. For monsters, * there are hallucination and changing from/to blindness, etc. * * * tmp_at * * This is a useful interface for displaying temporary items on the screen. * Its interface is different than previously, so look at it carefully. * * * * Parts of the rm structure that are used: * * typ - What is really there. * glyph - What the hero remembers. This will never be a monster. * Monsters "float" above this. * lit - True if the position is lit. An optimization for * lit/unlit rooms. * waslit - True if the position was *remembered* as lit. * seen - Set to true when the location is seen or felt as it really * is. This is used primarily for walls, which look like stone * if seen from the outside of a room. However, this is * also used as a guide for blind heros. If the hero has * seen or felt a room feature underneath a boulder, when the * boulder is moved, the hero should see it again. This is * also used as an indicator for unmapping detected objects. * * doormask - Additional information for the typ field. * horizontal - Indicates whether the wall or door is horizontal or * vertical. */ #include "hack.h" static void FDECL(display_monster,(XCHAR_P,XCHAR_P,struct monst *,int,XCHAR_P)); static int FDECL(swallow_to_glyph, (int, int)); #ifdef INVISIBLE_OBJECTS /* * vobj_at() * * Returns a pointer to an object if the hero can see an object at the * given location. This takes care of invisible objects. NOTE, this * assumes that the hero is not blind and on top of the object pile. * It does NOT take into account that the location is out of sight, or, * say, one can see blessed, etc. */ struct obj * vobj_at(x,y) xchar x,y; { register struct obj *obj = level.objects[x][y]; while (obj) { if (!obj->oinvis || See_invisible) return obj; obj = obj->nexthere; } return ((struct obj *) 0); } #endif /* else vobj_at() is defined in display.h */ /* * The routines map_background(), map_object(), and map_trap() could just * as easily be: * * map_glyph(x,y,glyph,show) * * Which is called with the xx_to_glyph() in the call. Then I can get * rid of 3 routines that don't do very much anyway. And then stop * having to create fake objects and traps. However, I am reluctant to * make this change. */ /* * map_background() * * Make the real background part of our map. This routine assumes that * the hero can physically see the location. Update the screen if directed. */ void map_background(x, y, show) register xchar x,y; register int show; { register int glyph = back_to_glyph(x,y); if (level.flags.hero_memory) levl[x][y].glyph = glyph; if (show) show_glyph(x,y, glyph); } /* * map_trap() * * Map the trap and print it out if directed. This routine assumes that the * hero can physically see the location. */ void map_trap(trap, show) register struct trap *trap; register int show; { register int x = trap->tx, y = trap->ty; register int glyph = trap_to_glyph(trap); if (level.flags.hero_memory) levl[x][y].glyph = glyph; if (show) show_glyph(x, y, glyph); } /* * map_object() * * Map the given object. This routine assumes that the hero can physically * see the location of the object. Update the screen if directed. */ void map_object(obj, show) register struct obj *obj; register int show; { register int x = obj->ox, y = obj->oy; register int glyph = obj_to_glyph(obj); if (level.flags.hero_memory) levl[x][y].glyph = glyph; if (show) show_glyph(x, y, glyph); } /* * unmap_object() * * Remove something from the map when detection reveals that it isn't * there any more. Replace it with background or known trap, but not * with any other remembered object. No need to update the display; * a full update is imminent. * * This isn't quite correct due to overloading of the seen bit. But * it works well enough for now. */ void unmap_object(x, y) register int x, y; { register struct trap *trap; if (!level.flags.hero_memory) return; if ((trap = t_at(x,y)) != 0 && trap->tseen && !covers_traps(x,y)) map_trap(trap, 0); else if (levl[x][y].seen) { struct rm *lev = &levl[x][y]; map_background(x, y, 0); /* turn remembered dark room squares dark */ if (!lev->waslit && lev->glyph == cmap_to_glyph(S_room) && lev->typ == ROOM) lev->glyph = cmap_to_glyph(S_stone); } else levl[x][y].glyph = cmap_to_glyph(S_stone); /* default val */ } /* * map_location() * * Make whatever at this location show up. This is only for non-living * things. This will not handle feeling invisible objects correctly. */ #define map_location(x,y,show) \ { \ register struct obj *obj; \ register struct trap *trap; \ \ if ((obj = vobj_at(x,y)) && !covers_objects(x,y)) \ map_object(obj,show); \ else if ((trap = t_at(x,y)) && trap->tseen && !covers_traps(x,y)) \ map_trap(trap,show); \ else \ map_background(x,y,show); \ } /* * display_monster() * * Note that this is *not* a map_XXXX() function! Monsters sort of float * above everything. * * Yuck. Display body parts by recognizing that the display position is * not the same as the monster position. Currently the only body part is * a worm tail. * */ static void display_monster(x, y, mon, in_sight, worm_tail) register xchar x, y; /* display position */ register struct monst *mon; /* monster to display */ int in_sight; /* TRUE if the monster is physically seen */ register xchar worm_tail; /* mon is actually a worm tail */ { register boolean mon_mimic = (mon->m_ap_type != M_AP_NOTHING); register int sensed = mon_mimic && (Protection_from_shape_changers || sensemon(mon)); /* * We must do the mimic check first. If the mimic is mimicing something, * and the location is in sight, we have to change the hero's memory * so that when the position is out of sight, the hero remembers what * the mimic was mimicing. */ if (mon_mimic && in_sight) { switch (mon->m_ap_type) { default: impossible("display_monster: bad m_ap_type value [ = %d ]", (int) mon->m_ap_type); case M_AP_NOTHING: show_glyph(x, y, mon_to_glyph(mon)); break; case M_AP_FURNITURE: { /* * This is a poor man's version of map_background(). I can't * use map_background() because we are overriding what is in * the 'typ' field. Maybe have map_background()'s parameters * be (x,y,glyph) instead of just (x,y). * * mappearance is currently set to an S_ index value in * makemon.c. */ register int glyph = cmap_to_glyph(mon->mappearance); levl[x][y].glyph = glyph; if (!sensed) show_glyph(x,y, glyph); break; } case M_AP_OBJECT: { struct obj obj; /* Make a fake object to send */ /* to map_object(). */ obj.ox = x; obj.oy = y; obj.otyp = mon->mappearance; obj.corpsenm = PM_TENGU; /* if mimicing a corpse */ map_object(&obj,!sensed); break; } case M_AP_MONSTER: show_glyph(x,y, monnum_to_glyph(what_mon(mon->mappearance))); break; } } /* If the mimic is unsucessfully mimicing something, display the monster */ if (!mon_mimic || sensed) { if (mon->mtame) { if (worm_tail) show_glyph(x,y, petnum_to_glyph(what_mon(PM_LONG_WORM_TAIL))); else show_glyph(x,y, pet_to_glyph(mon)); } else { if (worm_tail) show_glyph(x,y, monnum_to_glyph(what_mon(PM_LONG_WORM_TAIL))); else show_glyph(x,y, mon_to_glyph(mon)); } } } /* * feel_location() * * Feel the given location. This assumes that the hero is blind and that * the given position is either the hero's or one of the eight squares * adjacent to the hero (except for a boulder push). */ void feel_location(x, y) xchar x, y; { struct rm *lev = &(levl[x][y]); struct obj *boulder; register struct monst *mon; /* The hero can't feel non pool locations while under water. */ if (Underwater && !Is_waterlevel(&u.uz) && ! is_pool(x,y)) return; /* If the hero is not in a corridor, then she will feel the wall as a */ /* wall. It doesn't matter if the hero is levitating or not. */ if ((IS_WALL(lev->typ) || lev->typ == SDOOR) && levl[u.ux][u.uy].typ != CORR) lev->seen = 1; if (Levitation && !Is_airlevel(&u.uz) && !Is_waterlevel(&u.uz)) { /* * Levitation Rules. It is assumed that the hero can feel the state * of the walls around herself and can tell if she is in a corridor, * room, or doorway. Boulders are felt because they are large enough. * Anything else is unknown because the hero can't reach the ground. * This makes things difficult. * * Check (and display) in order: * * + Stone, walls, and closed doors. * + Boulders. [see a boulder before a doorway] * + Doors. * + Room/water positions * + Everything else (hallways!) */ if (IS_ROCK(lev->typ) || (IS_DOOR(lev->typ) && (lev->doormask & (D_LOCKED | D_CLOSED)))) { map_background(x, y, 1); } else if (boulder = sobj_at(BOULDER,x,y)) { map_object(boulder, 1); } else if (IS_DOOR(lev->typ)) { map_background(x, y, 1); } else if (IS_ROOM(lev->typ) || IS_POOL(lev->typ)) { /* * An open room or water location. Normally we wouldn't touch * this, but we have to get rid of remembered boulder symbols. * This will only occur in rare occations when the hero goes * blind and doesn't find a boulder where expected (something * came along and picked it up). We know that there is not a * boulder at this location. Show fountains, pools, etc. * underneath if already seen. Otherwise, show the appropriate * floor symbol. * * This isn't quite correct. If the boulder was on top of some * other objects they should be seen once the boulder is removed. * However, we have no way of knowing that what is there now * was there then. So we let the hero have a lapse of memory. * We could also just display what is currently on the top of the * object stack (if anything). */ if (lev->glyph == objnum_to_glyph(BOULDER)) { if (lev->typ != ROOM && lev->seen) { map_background(x, y, 1); } else { lev->glyph = lev->waslit ? cmap_to_glyph(S_room) : cmap_to_glyph(S_stone); show_glyph(x,y,lev->glyph); } } } else { /* We feel it (I think hallways are the only things left). */ map_background(x, y, 1); /* Corridors are never felt as lit (unless remembered that way) */ /* (lit_corridor only). */ if (lev->typ == CORR && lev->glyph == cmap_to_glyph(S_litcorr) && !lev->waslit) show_glyph(x, y, lev->glyph = cmap_to_glyph(S_corr)); } } else { map_location(x, y, 1); if (Punished) { /* * A ball or chain is only felt if it is first on the object * location list. Otherwise, we need to clear the felt bit --- * something has been dropped on the ball/chain. If the bit is * not cleared, then when the ball/chain is moved it will drop * the wrong glyph. */ if (uchain->ox == x && uchain->oy == y) { if (level.objects[x][y] == uchain) u.bc_felt |= BC_CHAIN; else u.bc_felt &= ~BC_CHAIN; /* do not feel the chain */ } if (!carried(uball) && uball->ox == x && uball->oy == y) { if (level.objects[x][y] == uball) u.bc_felt |= BC_BALL; else u.bc_felt &= ~BC_BALL; /* do not feel the ball */ } } /* Floor spaces are dark if unlit. Corridors are dark if unlit. */ if (lev->typ == ROOM && lev->glyph == cmap_to_glyph(S_room) && !lev->waslit) show_glyph(x,y, lev->glyph = cmap_to_glyph(S_stone)); else if (lev->typ == CORR && lev->glyph == cmap_to_glyph(S_litcorr) && !lev->waslit) show_glyph(x,y, lev->glyph = cmap_to_glyph(S_corr)); } /* draw monster on top if we can sense it */ if ((x != u.ux || y != u.uy) && (mon = m_at(x,y)) && sensemon(mon)) display_monster(x,y,mon,1,((x != mon->mx) || (y != mon->my))); } /* * newsym() * * Possibly put a new glyph at the given location. */ void newsym(x,y) register xchar x,y; { register struct monst *mon; register struct rm *lev = &(levl[x][y]); register int see_it; register xchar worm_tail; /* only permit updating the hero when swallowed */ if (u.uswallow) { if (x == u.ux && y == u.uy) display_self(); return; } if (Underwater && !Is_waterlevel(&u.uz)) { /* don't do anything unless (x,y) is an adjacent underwater position */ int dx, dy; if (!is_pool(x,y)) return; dx = x - u.ux; if (dx < 0) dx = -dx; dy = y - u.uy; if (dy < 0) dy = -dy; if (dx > 1 || dy > 1) return; } /* Can physically see the location. */ if (cansee(x,y)) { lev->waslit = (lev->lit!=0); /* remember lit condition */ if (x == u.ux && y == u.uy) { if (canseeself()) { map_location(x,y,0); /* map *under* self */ display_self(); } else /* we can see what is there */ map_location(x,y,1); } else if ((mon = m_at(x,y)) && ((see_it = mon_visible(mon)) || sensemon(mon))) { map_location(x,y,0); /* map under the monster */ worm_tail = ((x != mon->mx) || (y != mon->my)); display_monster(x,y,mon,see_it,worm_tail); } else map_location(x,y,1); /* map the location */ } /* Can't see the location. */ else { if (x == u.ux && y == u.uy) { feel_location(u.ux, u.uy); /* forces an update */ if (canseeself()) display_self(); } else if ((mon = m_at(x,y)) && sensemon(mon) && !((x != mon->mx) || (y != mon->my))) { /* Monsters are printed every time. */ display_monster(x,y,mon,0,0); } /* * If the location is remembered as being both dark (waslit is false) * and lit (glyph is a lit room or lit corridor) then it was either: * * (1) A dark location that the hero could see through night * vision. * * (2) Darkened while out of the hero's sight. This can happen * when cursed scroll of light is read. * * In either case, we have to manually correct the hero's memory to * match waslit. Deciding when to change waslit is non-trivial. * * Note: If flags.lit_corridor is set, then corridors act like room * squares. That is, they light up if in night vision range. * If flags.lit_corridor is not set, then corridors will * remain dark unless lit by a light spell. * * These checks and changes must be here and not in back_to_glyph(). * They are dependent on the position being out of sight. */ else if (!lev->waslit) { if (flags.lit_corridor && lev->glyph == cmap_to_glyph(S_litcorr) && lev->typ == CORR) show_glyph(x, y, lev->glyph = cmap_to_glyph(S_corr)); else if (lev->glyph == cmap_to_glyph(S_room) && lev->typ == ROOM) show_glyph(x, y, lev->glyph = cmap_to_glyph(S_stone)); else goto show_mem; } else { show_mem: show_glyph(x, y, lev->glyph); } } } /* * shieldeff() * * Put magic shield pyrotechnics at the given location. This *could* be * pulled into a platform dependent routine for fancier graphics if desired. */ void shieldeff(x,y) xchar x,y; { register int i; if (cansee(x,y)) { /* Don't see anything if can't see the location */ for (i = 0; i < SHIELD_COUNT; i++) { show_glyph(x, y, cmap_to_glyph(shield_static[i])); flush_screen(1); /* make sure the glyph shows up */ delay_output(); } newsym(x,y); /* restore the old information */ } } /* * tmp_at() * * Temporarily place glyphs on the screen. Do not call delay_output(). It * is up to the caller to decide if it wants to wait [presently, everyone * but explode() wants to delay]. * * Call: * (DISP_BEAM, glyph) open, initialize glyph * (DISP_FLASH, glyph) open, initialize glyph * (DISP_CHANGE, glyph) change glyph * (DISP_END, 0) close & clean up (second argument doesn't * matter) * (x, y) display the glyph at the location * * DISP_BEAM - Display the given glyph at each location, but do not erase * any until the close call. * DISP_FLASH - Display the given glyph at each location, but erase the * previous location's glyph. */ void tmp_at(x, y) int x, y; { static coord saved[COLNO]; /* prev positions, only for DISP_BEAM */ static int sidx = 0; /* index of saved previous positions */ static int sx = -1, sy; /* previous position, only for DISP_FLASH */ static int status; /* either DISP_BEAM or DISP_FLASH */ static int glyph; /* glyph to use when printing */ switch (x) { case DISP_BEAM: case DISP_FLASH: status = x; glyph = y; flush_screen(0); /* flush buffered glyphs */ break; case DISP_CHANGE: glyph = y; break; case DISP_END: if (status == DISP_BEAM) { register int i; /* Erase (reset) from source to end */ for (i = 0; i < sidx; i++) newsym(saved[i].x,saved[i].y); sidx = 0; } else if (sx >= 0) { /* DISP_FLASH (called at least once) */ newsym(sx,sy); /* reset the location */ sx = -1; /* reset sx to an illegal pos for next time */ } break; default: /* do it */ if (!cansee(x,y)) break; if (status == DISP_BEAM) { saved[sidx ].x = x; /* save pos for later erasing */ saved[sidx++].y = y; } else { /* DISP_FLASH */ if (sx >= 0) /* not first call */ newsym(sx,sy); /* update the old position */ sx = x; /* save previous pos for next call */ sy = y; } show_glyph(x,y,glyph); /* show it */ flush_screen(0); /* make sure it shows up */ break; } /* end case */ } /* * swallowed() * * The hero is swallowed. Show a special graphics sequence for this. This * bypasses all of the display routines and messes with buffered screen * directly. This method works because both vision and display check for * being swallowed. */ void swallowed(first) int first; { static xchar lastx, lasty; /* last swallowed position */ int swallower; if (first) cls(); else { register int x, y; /* Clear old location */ for (y = lasty-1; y <= lasty+1; y++) if(isok(lastx,y)) { for (x = lastx-1; x <= lastx+1; x++) show_glyph(x,y,cmap_to_glyph(S_stone)); } } swallower = monsndx(u.ustuck->data); /* * Display the hero surrounded by the monster's stomach. */ if(isok(u.ux, u.uy-1)) { show_glyph(u.ux-1, u.uy-1, swallow_to_glyph(swallower, S_sw_tl)); show_glyph(u.ux , u.uy-1, swallow_to_glyph(swallower, S_sw_tc)); show_glyph(u.ux+1, u.uy-1, swallow_to_glyph(swallower, S_sw_tr)); } show_glyph(u.ux-1, u.uy , swallow_to_glyph(swallower, S_sw_ml)); display_self(); show_glyph(u.ux+1, u.uy , swallow_to_glyph(swallower, S_sw_mr)); if(isok(u.ux, u.uy+1)) { show_glyph(u.ux-1, u.uy+1, swallow_to_glyph(swallower, S_sw_bl)); show_glyph(u.ux , u.uy+1, swallow_to_glyph(swallower, S_sw_bc)); show_glyph(u.ux+1, u.uy+1, swallow_to_glyph(swallower, S_sw_br)); } /* Update the swallowed position. */ lastx = u.ux; lasty = u.uy; } /* * under_water() * * Similar to swallowed() in operation. Shows hero when underwater * except when in water level. Special routines exist for that. */ void under_water(mode) int mode; { static xchar lastx, lasty; static boolean dela; register int x, y; /* swallowing has a higher precedence than under water */ if (Is_waterlevel(&u.uz) || u.uswallow) return; /* full update */ if (mode == 1 || dela) { cls(); dela = FALSE; } /* delayed full update */ else if (mode == 2) { dela = TRUE; return; } /* limited update */ else { for (y = lasty-1; y <= lasty+1; y++) for (x = lastx-1; x <= lastx+1; x++) if (isok(x,y)) show_glyph(x,y,cmap_to_glyph(S_stone)); } for (x = u.ux-1; x <= u.ux+1; x++) for (y = u.uy-1; y <= u.uy+1; y++) if (isok(x,y) && is_pool(x,y)) { if (Blind && !(x == u.ux && y == u.uy)) show_glyph(x,y,cmap_to_glyph(S_stone)); else newsym(x,y); } lastx = u.ux; lasty = u.uy; } /* ========================================================================= */ /* * Loop through all of the monsters and update them. Called when: * + going blind & telepathic * + regaining sight & telepathic * + hallucinating * + doing a full screen redraw * + see invisible times out or a ring of see invisible is taken off * + when a potion of see invisible is quaffed or a ring of see * invisible is put on * + gaining telepathy when blind [givit() in eat.c, pleased() in pray.c] * + losing telepathy while blind [xkilled() in mon.c, attrcurse() in * sit.c] */ void see_monsters() { register struct monst *mon; for (mon = fmon; mon; mon = mon->nmon) { newsym(mon->mx,mon->my); if (mon->wormno) see_wsegs(mon); } } /* * Block/unblock light depending on what a mimic is mimicing and if it's * invisible or not. Should be called only when the state of See_invisible * changes. */ void set_mimic_blocking() { register struct monst *mon; for (mon = fmon; mon; mon = mon->nmon) if(mon->minvis && ((mon->m_ap_type == M_AP_FURNITURE && (mon->mappearance == S_vcdoor || mon->mappearance == S_hcdoor))|| (mon->m_ap_type == M_AP_OBJECT && mon->mappearance == BOULDER))) { if(See_invisible) block_point(mon->mx, mon->my); else unblock_point(mon->mx, mon->my); } } /* * Loop through all of the object *locations* and update them. Called when * + hallucinating. */ void see_objects() { register struct obj *obj; for(obj = fobj; obj; obj = obj->nobj) if (vobj_at(obj->ox,obj->oy) == obj) newsym(obj->ox, obj->oy); } /* * Put the cursor on the hero. Flush all accumulated glyphs before doing it. */ void curs_on_u() { flush_screen(1); /* Flush waiting glyphs & put cursor on hero */ } int doredraw() { docrt(); return 0; } void docrt() { register int x,y; register struct rm *lev; if (!u.ux) return; /* display isn't ready yet */ if (u.uswallow) { swallowed(1); return; } if (Underwater && !Is_waterlevel(&u.uz)) { under_water(1); return; } /* shut down vision */ vision_recalc(2); /* * This routine assumes that cls() does the following: * + fills the physical screen with the symbol for rock * + clears the glyph buffer */ cls(); /* display memory */ for (x = 1; x < COLNO; x++) { lev = &levl[x][0]; for (y = 0; y < ROWNO; y++, lev++) if (lev->glyph != cmap_to_glyph(S_stone)) show_glyph(x,y,lev->glyph); } /* see what is to be seen */ vision_recalc(0); /* overlay with monsters */ see_monsters(); flags.botlx = 1; /* force a redraw of the bottom line */ } /* ========================================================================= */ /* Glyph Buffering (3rd screen) ============================================ */ typedef struct { xchar new; /* perhaps move this bit into the rm strucure. */ int glyph; } gbuf_entry; static gbuf_entry gbuf[ROWNO][COLNO]; static char gbuf_start[ROWNO]; static char gbuf_stop[ROWNO]; /* * Store the glyph in the 3rd screen for later flushing. */ void show_glyph(x,y,glyph) xchar x,y; int glyph; { /* * Check for bad positions and glyphs. */ if (x <= 0 || x >= COLNO || y < 0 || y >= ROWNO) { const char *text; int offset; /* column 0 is invalid, but it's often used as a flag, so ignore it */ if (x == 0) return; /* * This assumes an ordering of the offsets. See display.h for * the definition. */ if (glyph >= GLYPH_SWALLOW_OFF) { /* swallow border */ text = "swallow border"; offset = glyph - GLYPH_SWALLOW_OFF; }else if (glyph >= GLYPH_ZAP_OFF) { /* zap beam */ text = "zap beam"; offset = glyph - GLYPH_ZAP_OFF; } else if (glyph >= GLYPH_CMAP_OFF) { /* cmap */ text = "cmap_index"; offset = glyph - GLYPH_CMAP_OFF; } else if (glyph >= GLYPH_TRAP_OFF) { /* trap */ text = "trap"; offset = glyph - GLYPH_TRAP_OFF; } else if (glyph >= GLYPH_OBJ_OFF) { /* object */ text = "object"; offset = glyph - GLYPH_OBJ_OFF; } else if (glyph >= GLYPH_BODY_OFF) { /* a corpse */ text = "corpse"; offset = glyph - GLYPH_BODY_OFF; } else { /* a monster */ text = "monster"; offset = glyph; } impossible("show_glyph: bad pos %d %d with glyph %d [%s %d].", x, y, glyph, text, offset); return; } if (glyph >= MAX_GLYPH) { impossible("show_glyph: bad glyph %d [max %d] at (%d,%d).", glyph, MAX_GLYPH, x, y); return; } if (gbuf[y][x].glyph != glyph) { gbuf[y][x].glyph = glyph; gbuf[y][x].new = 1; if (gbuf_start[y] > x) gbuf_start[y] = x; if (gbuf_stop[y] < x) gbuf_stop[y] = x; } } /* * Reset the changed glyph borders so that none of the 3rd screen has * changed. */ #define reset_glyph_bbox() \ { \ int i; \ \ for (i = 0; i < ROWNO; i++) { \ gbuf_start[i] = COLNO-1; \ gbuf_stop[i] = 0; \ } \ } static gbuf_entry nul_gbuf = { 0, cmap_to_glyph(S_stone) }; /* * Turn the 3rd screen into stone. */ void clear_glyph_buffer() { register int x, y; register gbuf_entry *gptr; for (y = 0; y < ROWNO; y++) { gptr = &gbuf[y][0]; for (x = COLNO; x; x--) { *gptr++ = nul_gbuf; } } reset_glyph_bbox(); } /* * Assumes that the indicated positions are filled with S_stone glyphs. */ void row_refresh(start,stop,y) int start,stop,y; { register int x; for (x = start; x <= stop; x++) if (gbuf[y][x].glyph != cmap_to_glyph(S_stone)) print_glyph(WIN_MAP,x,y,gbuf[y][x].glyph); } void cls() { display_nhwindow(WIN_MESSAGE, FALSE); /* flush messages */ flags.botlx = 1; /* force update of botl window */ clear_nhwindow(WIN_MAP); /* clear physical screen */ clear_glyph_buffer(); /* this is sort of an extra effort, but OK */ } /* * Synch the third screen with the display. */ void flush_screen(cursor_on_u) int cursor_on_u; { /* Prevent infinite loops on errors: * flush_screen->print_glyph->impossible->pline->flush_screen */ static boolean flushing = 0; register int x,y; if (flushing) return; /* if already flushing then return */ flushing = 1; for (y = 0; y < ROWNO; y++) { register gbuf_entry *gptr = &gbuf[y][x = gbuf_start[y]]; for (; x <= gbuf_stop[y]; gptr++, x++) if (gptr->new) { print_glyph(WIN_MAP,x,y,gptr->glyph); gptr->new = 0; } } if (cursor_on_u) curs(WIN_MAP, u.ux,u.uy); /* move cursor to the hero */ display_nhwindow(WIN_MAP, FALSE); reset_glyph_bbox(); flushing = 0; if(flags.botl || flags.botlx) bot(); } /* ========================================================================= */ /* * 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' field (really doormask) for deciding if stairwells * were up or down. I didn't want to check the upstairs and dnstairs * variables. */ int back_to_glyph(x,y) xchar x,y; { int idx; struct rm *ptr = &(levl[x][y]); switch (ptr->typ) { case SCORR: case STONE: idx = S_stone; break; case ROOM: idx = S_room; break; case CORR: idx = (ptr->waslit || flags.lit_corridor) ? S_litcorr : S_corr; break; case HWALL: idx = ptr->seen ? S_hwall : S_stone; break; case VWALL: idx = ptr->seen ? S_vwall : S_stone; break; case TLCORNER: idx = ptr->seen ? S_tlcorn : S_stone; break; case TRCORNER: idx = ptr->seen ? S_trcorn : S_stone; break; case BLCORNER: idx = ptr->seen ? S_blcorn : S_stone; break; case BRCORNER: idx = ptr->seen ? S_brcorn : S_stone; break; case CROSSWALL: idx = ptr->seen ? S_crwall : S_stone; break; case TUWALL: idx = ptr->seen ? S_tuwall : S_stone; break; case TDWALL: idx = ptr->seen ? S_tdwall : S_stone; break; case TLWALL: idx = ptr->seen ? S_tlwall : S_stone; break; case TRWALL: idx = ptr->seen ? S_trwall : S_stone; break; case SDOOR: if (ptr->seen) idx = (ptr->horizontal) ? S_hwall : S_vwall; else idx = 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 POOL: case MOAT: idx = S_pool; break; case STAIRS: idx = (ptr->ladder & LA_DOWN) ? S_dnstair : S_upstair; break; case LADDER: idx = (ptr->ladder & LA_DOWN) ? S_dnladder : S_upladder; break; case FOUNTAIN: idx = S_fountain; break; case SINK: idx = S_sink; break; case ALTAR: idx = S_altar; break; case THRONE: idx = S_throne; break; case LAVAPOOL: idx = S_lava; break; case ICE: idx = S_ice; break; case AIR: idx = S_air; break; case CLOUD: idx = S_cloud; break; case WATER: idx = S_water; break; case DBWALL: idx = (ptr->horizontal) ? S_hcdbridge : S_vcdbridge; break; case DRAWBRIDGE_UP: switch(ptr->drawbridgemask & DB_UNDER) { case DB_MOAT: idx = S_pool; break; case DB_LAVA: idx = S_lava; break; case DB_ICE: idx = S_ice; break; case DB_FLOOR: idx = S_room; break; default: impossible("Strange db-under: %d", ptr->drawbridgemask & DB_UNDER); idx = S_room; /* something is better than nothing */ break; } break; case DRAWBRIDGE_DOWN: idx = (ptr->horizontal) ? S_hodbridge : S_vodbridge; break; default: impossible("back_to_glyph: unknown level type [ = %d ]",ptr->typ); idx = S_room; break; } return cmap_to_glyph(idx); } /* * swallow_to_glyph() * * Convert a monster number and a swallow location into the correct glyph. * If you don't want a patchwork monster while hallucinating, decide on * a random monster in swallowed() and don't use what_mon() here. */ static int swallow_to_glyph(mnum, loc) int mnum; int loc; { if (loc < S_sw_tl || S_sw_br < loc) { impossible("swallow_to_glyph: bad swallow location"); loc = S_sw_br; } return ((int) (what_mon(mnum)<<3) | (loc - S_sw_tl)) + GLYPH_SWALLOW_OFF; } /* * zapdir_to_glyph() * * Change the given zap direction and beam type into a glyph. Each beam * type has four glyphs, one for each of the symbols below. The order of * the zap symbols [0-3] as defined in rm.h are: * * | S_vbeam ( 0, 1) or ( 0,-1) * - S_hbeam ( 1, 0) or (-1, 0) * \ S_lslant ( 1, 1) or (-1,-1) * / S_rslant (-1, 1) or ( 1,-1) */ int zapdir_to_glyph(dx, dy, beam_type) register int dx, dy; int beam_type; { if (beam_type >= NUM_ZAP) { impossible("zapdir_to_glyph: illegal beam type"); beam_type = 0; } dx = (dx == dy) ? 2 : (dx && dy) ? 3 : dx ? 1 : 0; return ((int) ((beam_type << 2) | dx)) + GLYPH_ZAP_OFF; } /* * Utility routine for dowhatis() used to find out the glyph displayed at * the location. This isn't necessarily the same as the glyph in the levl * structure, so we must check the "third screen". */ int glyph_at(x, y) xchar x,y; { if(x < 0 || y < 0 || x >= COLNO || y >= ROWNO) return cmap_to_glyph(S_room); /* XXX */ return gbuf[y][x].glyph; } /*display.c*/