Implement game state interpolation (WIP)
[neverball] / ball / st_demo.c
index 0c10f5a..7e388dc 100644 (file)
@@ -1,4 +1,4 @@
-/*   
+/*
  * Copyright (C) 2003 Robert Kooima
  *
  * NEVERBALL is  free software; you can redistribute  it and/or modify
  * General Public License for more details.
  */
 
+#include <string.h>
+
 #include "gui.h"
 #include "hud.h"
 #include "set.h"
-#include "game.h"
 #include "demo.h"
-#include "level.h"
+#include "progress.h"
 #include "audio.h"
-#include "solid.h"
 #include "config.h"
-#include "st_shared.h"
+#include "util.h"
+#include "common.h"
+#include "demo_dir.h"
+#include "speed.h"
+
+#include "game_common.h"
+#include "game_server.h"
+#include "game_client.h"
 
 #include "st_demo.h"
 #include "st_title.h"
-
-extern struct state st_demo_play;
-extern struct state st_demo_end;
-extern struct state st_demo_del;
+#include "st_shared.h"
 
 /*---------------------------------------------------------------------------*/
 
-#define DEMO_BACK -1
-#define DEMO_NEXT -2
-#define DEMO_PREV -3
-
 #define DEMO_LINE 4
 #define DEMO_STEP 8
 
+static Array items;
+
 static int first = 0;
 static int total = 0;
+static int last  = 0;
 
-static float replay_time;
-static float global_time;
+static int last_viewed = 0;
 
 /*---------------------------------------------------------------------------*/
 
@@ -53,40 +55,104 @@ static int demo_action(int i)
 
     switch (i)
     {
-    case DEMO_BACK:
+    case GUI_BACK:
         return goto_state(&st_title);
 
-    case DEMO_NEXT:
+    case GUI_NEXT:
         first += DEMO_STEP;
         return goto_state(&st_demo);
         break;
 
-    case DEMO_PREV:
+    case GUI_PREV:
         first -= DEMO_STEP;
         return goto_state(&st_demo);
         break;
 
+    case GUI_NULL:
+        return 1;
+        break;
+
     default:
-        if (level_replay(demo_filename(i)))
-            return goto_demo_play(0);
+        if (progress_replay(DIR_ITEM_GET(items, i)->path))
+        {
+            last_viewed = i;
+            demo_play_goto(0);
+            return goto_state(&st_demo_play);
+        }
+        break;
     }
     return 1;
 }
 
-static void demo_replay(int id, int i)
+/*---------------------------------------------------------------------------*/
+
+static struct thumb
+{
+    int item;
+    int shot;
+    int name;
+} thumbs[DEMO_STEP];
+
+static int gui_demo_thumbs(int id)
 {
     int w = config_get_d(CONFIG_WIDTH);
     int h = config_get_d(CONFIG_HEIGHT);
-    int jd;
 
-    if ((jd = gui_vstack(id)))
-    {
-        gui_space(jd);
+    int jd, kd, ld;
+    int i, j;
+
+    struct thumb *thumb;
+
+    if ((jd = gui_varray(id)))
+        for (i = first; i < first + DEMO_STEP; i += DEMO_LINE)
+            if ((kd = gui_harray(jd)))
+            {
+                for (j = i + DEMO_LINE - 1; j >= i; j--)
+                {
+                    thumb = &thumbs[j % DEMO_STEP];
+
+                    thumb->item = j;
+
+                    if (j < total)
+                    {
+                        if ((ld = gui_vstack(kd)))
+                        {
+                            gui_space(ld);
 
-        gui_image(jd, demo_shot(i), w / 6, h / 6);
-        gui_state(jd, demo_name(i), GUI_SML, i, 0);
+                            thumb->shot = gui_image(ld, " ", w / 6, h / 6);
+                            thumb->name = gui_state(ld, " ", GUI_SML, j, 0);
 
-        gui_active(jd, i, 0);
+                            gui_set_trunc(thumb->name, TRUNC_TAIL);
+
+                            gui_active(ld, j, 0);
+                        }
+                    }
+                    else
+                    {
+                        gui_space(kd);
+
+                        thumb->shot = 0;
+                        thumb->name = 0;
+                    }
+                }
+            }
+
+    return jd;
+}
+
+static void gui_demo_update_thumbs(void)
+{
+    struct dir_item *item;
+    struct demo *demo;
+    int i;
+
+    for (i = 0; i < ARRAYSIZE(thumbs) && thumbs[i].shot && thumbs[i].name; i++)
+    {
+        item = DIR_ITEM_GET(items, thumbs[i].item);
+        demo = item->data;
+
+        gui_set_image(thumbs[i].shot, demo ? demo->shot : "");
+        gui_set_label(thumbs[i].name, demo ? demo->name : base_name(item->path));
     }
 }
 
@@ -94,122 +160,210 @@ static int name_id;
 static int time_id;
 static int coin_id;
 static int date_id;
-static int mode_id;
+static int status_id;
 static int player_id;
 
-static void demo_status(int i)
+static int gui_demo_status(int id)
 {
-    char ds[MAXSTR];
-    demo_str_date(i, ds, MAXSTR);
-    gui_set_label(name_id,   demo_name(i));
-    gui_set_label(date_id,   ds);
-    gui_set_label(player_id, demo_player(i));
-    gui_set_label(mode_id,   mode_to_str(demo_mode(i)));
-    gui_set_count(coin_id,   demo_coins(i));
-    gui_set_clock(time_id,   demo_clock(i));
+    const char *status;
+    int jd, kd, ld;
+    int s;
+
+    /* Find the longest status string. */
+
+    for (status = "", s = GAME_NONE; s < GAME_MAX; s++)
+        if (strlen(status_to_str(s)) > strlen(status))
+            status = status_to_str(s);
+
+    /* Build info bar with dummy values. */
+
+    if ((jd = gui_hstack(id)))
+    {
+        gui_filler(jd);
+
+        if ((kd = gui_hstack(jd)))
+        {
+            if ((ld = gui_vstack(kd)))
+            {
+                gui_filler(ld);
+
+                time_id   = gui_clock(ld, 35000,  GUI_SML, GUI_NE);
+                coin_id   = gui_count(ld, 100,    GUI_SML, 0);
+                status_id = gui_label(ld, status, GUI_SML, GUI_SE,
+                                      gui_red, gui_red);
+
+                gui_filler(ld);
+            }
+
+            if ((ld = gui_vstack(kd)))
+            {
+                gui_filler(ld);
+
+                gui_label(ld, _("Time"),   GUI_SML, GUI_NW, gui_wht, gui_wht);
+                gui_label(ld, _("Coins"),  GUI_SML, 0,      gui_wht, gui_wht);
+                gui_label(ld, _("Status"), GUI_SML, GUI_SW, gui_wht, gui_wht);
+
+                gui_filler(ld);
+            }
+        }
+
+        gui_space(jd);
+
+        if ((kd = gui_vstack(jd)))
+        {
+            gui_filler(kd);
+
+            name_id   = gui_label(kd, " ", GUI_SML, GUI_NE, 0, 0);
+            player_id = gui_label(kd, " ", GUI_SML, 0,      0, 0);
+            date_id   = gui_label(kd, date_to_str(time(NULL)),
+                                  GUI_SML, GUI_SE, 0, 0);
+
+            gui_filler(kd);
+
+            gui_set_trunc(name_id,   TRUNC_TAIL);
+            gui_set_trunc(player_id, TRUNC_TAIL);
+        }
+
+        if ((kd = gui_vstack(jd)))
+        {
+            gui_filler(kd);
+
+            gui_label(kd, _("Replay"), GUI_SML, GUI_NW, gui_wht, gui_wht);
+            gui_label(kd, _("Player"), GUI_SML, 0,      gui_wht, gui_wht);
+            gui_label(kd, _("Date"),   GUI_SML, GUI_SW, gui_wht, gui_wht);
+
+            gui_filler(kd);
+        }
+
+        gui_filler(jd);
+    }
+
+    return jd;
 }
 
-static int demo_enter(void)
+static void gui_demo_update_status(int i)
 {
-    int i, j;
-    int id, jd, kd, ld;
+    const struct demo *d;
+
+    if (!total)
+        return;
+
+    d = DEMO_GET(items, i < total ? i : 0);
+
+    if (!d)
+        return;
+
+    gui_set_label(name_id,   d->name);
+    gui_set_label(date_id,   date_to_str(d->date));
+    gui_set_label(player_id, d->player);
+
+    if (d->status == GAME_GOAL)
+        gui_set_color(status_id, gui_grn, gui_grn);
+    else
+        gui_set_color(status_id, gui_red, gui_red);
+
+    gui_set_label(status_id, status_to_str(d->status));
+    gui_set_count(coin_id, d->coins);
+    gui_set_clock(time_id, d->timer);
+}
+
+/*---------------------------------------------------------------------------*/
 
-    total = demo_scan();
+static int demo_gui(void)
+{
+    int id, jd;
 
     id = gui_vstack(0);
-    if (total == 0)
+
+    if (total)
     {
-           gui_label(id, _("No Replay"), GUI_MED, GUI_ALL, 0,0);
-           gui_filler(id);
-           gui_multi(id, _("You can save replay of you games.\\Currently, there is no replay saved."), GUI_SML, GUI_ALL, gui_wht, gui_wht);
-           gui_filler(id);
-           gui_start(id, _("Back"), GUI_SML, DEMO_BACK, 0);
-            gui_layout(id, 0, 0);
+        if ((jd = gui_hstack(id)))
+        {
+
+            gui_label(jd, _("Select Replay"), GUI_SML, GUI_ALL, 0,0);
+            gui_filler(jd);
+            gui_navig(jd, first > 0, first + DEMO_STEP < total);
+        }
+
+        gui_demo_thumbs(id);
+        gui_space(id);
+        gui_demo_status(id);
+
+        gui_layout(id, 0, 0);
+
+        gui_demo_update_thumbs();
+        gui_demo_update_status(last_viewed);
     }
     else
     {
-       if ((jd = gui_hstack(id)))
-        {
+        gui_label(id, _("No Replays"), GUI_MED, GUI_ALL, 0, 0);
+        gui_layout(id, 0, 0);
+    }
 
-            ld = gui_label(jd, _("Select Replay"), GUI_SML, GUI_ALL, 0,0);
-            gui_filler(jd);
+    return id;
+}
 
-           
-           
-           if (first + DEMO_STEP < total)
-               gui_state(jd, _("Next"), GUI_SML, DEMO_NEXT, 0);
-           else
-               gui_label(jd, _("Next"), GUI_SML, GUI_ALL, gui_gry, gui_gry);
-           
-           gui_start(jd, _("Back"), GUI_SML, DEMO_BACK, 0);
-
-           if (first > 0)
-                gui_state(jd, _("Prev"), GUI_SML, DEMO_PREV, 0);
-           else
-               gui_label(jd, _("Prev"), GUI_SML, GUI_ALL, gui_gry, gui_gry);
-           
+static int demo_enter(struct state *st, struct state *prev)
+{
+    if (!items || (prev == &st_demo_del))
+    {
+        if (items)
+        {
+            demo_dir_free(items);
+            items = NULL;
         }
-        if ((jd = gui_varray(id)))
-            for (i = first; i < first + DEMO_STEP ; i += DEMO_LINE)
-                if ((kd = gui_harray(jd)))
-                {
-                    for (j = i + DEMO_LINE - 1; j >= i; j--)
-                        if (j < total)
-                            demo_replay(kd, j);
-                        else
-                            gui_space(kd);
-                }
-       gui_filler(id);
-       if ((jd = gui_hstack(id)))
-       {
-           if((kd = gui_vstack(jd)))
-           {
-               if ((ld = gui_harray(kd)))
-               {
-                   coin_id = gui_count(ld, 100,          GUI_SML, GUI_RGT);
-                   gui_label(ld, _("Coins"),             GUI_SML, GUI_LFT, gui_wht, gui_wht);
-                   time_id = gui_clock(ld, 35000,        GUI_SML, GUI_RGT);
-                   gui_label(ld, _("Time"),              GUI_SML, GUI_LFT, gui_wht, gui_wht);
-                   name_id = gui_label(ld, demo_name(0), GUI_SML, GUI_RGT, 0, 0);
-               }
-               if ((ld = gui_harray(kd)))
-               {
-                   mode_id = gui_label(ld, "..............", GUI_SML, GUI_RGT, 0, 0);
-                   gui_label(ld, _("Mode"),                  GUI_SML, GUI_LFT, gui_wht, gui_wht);
-                   player_id = gui_label(ld, demo_player(0), GUI_SML, GUI_RGT, 0, 0);
-               }
-               date_id = gui_label(kd, "X",     GUI_SML, GUI_RGT, 0, 0);
-           }
-           if((kd = gui_vstack(jd)))
-           {
-               gui_label(kd, _("Name"), GUI_SML, GUI_LFT, gui_wht, gui_wht);
-               gui_label(kd, _("Player"), GUI_SML, GUI_LFT, gui_wht, gui_wht);
-               gui_label(kd, _("Date"), GUI_SML, GUI_LFT, gui_wht, gui_wht);
-           }
-       }
-       gui_layout(id, 0, 0);
-        demo_status(0);
+
+        items = demo_dir_scan();
+        total = array_len(items);
     }
 
+    first       = first < total ? first : 0;
+    last        = MIN(first + DEMO_STEP - 1, total - 1);
+    last_viewed = MIN(MAX(first, last_viewed), last);
+
+    if (total)
+        demo_dir_load(items, first, last);
+
     audio_music_fade_to(0.5f, "bgm/inter.ogg");
 
-    return id;
+    return demo_gui();
+}
+
+static void demo_leave(struct state *st, struct state *next, int id)
+{
+    if (next == &st_title)
+    {
+        demo_dir_free(items);
+        items = NULL;
+    }
+
+    gui_delete(id);
+}
+
+static void demo_timer(int id, float dt)
+{
+    if (total == 0 && time_state() > 4.0f)
+        goto_state(&st_title);
+
+    gui_timer(id, dt);
 }
 
 static void demo_point(int id, int x, int y, int dx, int dy)
 {
     int jd = shared_point_basic(id, x, y);
     int i  = gui_token(jd);
-    if (jd && i>=0)
-       demo_status(i);
+
+    if (jd && i >= 0 && !GUI_ISMSK(i))
+        gui_demo_update_status(i);
 }
 
-static void demo_stick(int id, int a, int v)
+static void demo_stick(int id, int a, float v, int bump)
 {
-    int jd = shared_stick_basic(id, a, v);
+    int jd = shared_stick_basic(id, a, v, bump);
     int i  = gui_token(jd);
-    if (jd && i>=0)
-       demo_status(i);
+
+    if (jd && i >= 0 && !GUI_ISMSK(i))
+        gui_demo_update_status(i);
 }
 
 static int demo_buttn(int b, int d)
@@ -217,74 +371,153 @@ static int demo_buttn(int b, int d)
     if (d)
     {
         if (config_tst_d(CONFIG_JOYSTICK_BUTTON_A, b))
-            return demo_action(gui_token(gui_click()));
+            return demo_action(total ? gui_token(gui_click()) : GUI_BACK);
         if (config_tst_d(CONFIG_JOYSTICK_BUTTON_EXIT, b))
-            return demo_action(DEMO_BACK);
+            return demo_action(GUI_BACK);
     }
     return 1;
 }
 
 /*---------------------------------------------------------------------------*/
 
-static int simple_play;
-int goto_demo_play(int simple)
+static int standalone;
+static int demo_paused;
+static int show_hud;
+static int check_compat;
+static int speed;
+
+static float prelude;
+
+void demo_play_goto(int s)
 {
-    simple_play = simple;
-    return goto_state(&st_demo_play);
+    standalone   = s;
+    check_compat = 1;
 }
 
-static int demo_play_enter(void)
+static int demo_play_gui(void)
 {
     int id;
 
-    if ((id = gui_label(0, _("Replay"), GUI_LRG, GUI_ALL, gui_blu, gui_grn)))
+    if ((id = gui_vstack(0)))
     {
+        gui_label(id, _("Replay"), GUI_LRG, GUI_ALL, gui_blu, gui_grn);
         gui_layout(id, 0, 0);
         gui_pulse(id, 1.2f);
     }
 
-    global_time = -1.f;
-    replay_time =  0.f;
+    return id;
+}
 
-    hud_update(0);
+static int demo_play_enter(struct state *st, struct state *prev)
+{
+    if (demo_paused)
+    {
+        demo_paused = 0;
+        prelude = 0;
+        audio_music_fade_in(0.5f);
+        return 0;
+    }
 
-    game_set_fly(0.f);
+    /*
+     * Post-1.5.1 replays include view data in the first update, this
+     * line is currently left in for compatibility with older replays.
+     */
+    game_client_fly(0.0f);
 
-    return id;
+    if (check_compat && !game_compat_map)
+    {
+        goto_state(&st_demo_compat);
+        return 0;
+    }
+
+    prelude = 1.0f;
+
+    speed = SPEED_NORMAL;
+    demo_speed_set(speed);
+
+    show_hud = 1;
+    hud_update(0);
+
+    return demo_play_gui();
 }
 
-static void demo_play_paint(int id, float st)
+static void demo_play_paint(int id, float t)
 {
-    game_draw(0, st);
-    hud_paint();
+    game_client_draw(0, t, demo_play_blend());
+
+    if (show_hud)
+        hud_paint();
 
-    if (time_state() < 1.f)
+    if (time_state() < prelude)
         gui_paint(id);
 }
 
 static void demo_play_timer(int id, float dt)
 {
-    float t;
-
     game_step_fade(dt);
     gui_timer(id, dt);
-    audio_timer(dt);
-
-    global_time += dt;
     hud_timer(dt);
 
-    /* Spin or skip depending on how fast the demo wants to run. */
+    /* Pause briefly before starting playback. */
 
-    while (replay_time < global_time)
-        if (demo_replay_step(&t))
-        {
-            replay_time += t;
-        }
-        else 
+    if (time_state() < prelude)
+        return;
+
+    if (!demo_replay_step(dt))
+    {
+        demo_paused = 0;
+        goto_state(&st_demo_end);
+    }
+    else
+        progress_step();
+}
+
+static void set_speed(int d)
+{
+    if (d > 0) speed = SPEED_UP(speed);
+    if (d < 0) speed = SPEED_DN(speed);
+
+    demo_speed_set(speed);
+    hud_speed_pulse(speed);
+}
+
+static void demo_play_stick(int id, int a, float v, int bump)
+{
+    if (!bump)
+        return;
+
+    if (config_tst_d(CONFIG_JOYSTICK_AXIS_Y, a))
+    {
+        if (v < 0) set_speed(+1);
+        if (v > 0) set_speed(-1);
+    }
+}
+
+static int demo_play_click(int b, int d)
+{
+    if (d)
+    {
+        if (b == SDL_BUTTON_WHEELUP)   set_speed(+1);
+        if (b == SDL_BUTTON_WHEELDOWN) set_speed(-1);
+    }
+
+    return 1;
+}
+
+static int demo_play_keybd(int c, int d)
+{
+    if (d)
+    {
+        if (config_tst_d(CONFIG_KEY_PAUSE, c))
         {
-            goto_state(&st_demo_end);
-            break;
+            demo_paused = 1;
+            return goto_state(&st_demo_end);
         }
+
+        if (c == SDLK_F6)
+            show_hud = !show_hud;
+    }
+    return 1;
 }
 
 static int demo_play_buttn(int b, int d)
@@ -292,16 +525,23 @@ static int demo_play_buttn(int b, int d)
     if (d)
     {
         if (config_tst_d(CONFIG_JOYSTICK_BUTTON_EXIT, b))
+        {
+            if (config_tst_d(CONFIG_KEY_PAUSE, SDLK_ESCAPE))
+                demo_paused = 1;
+
             return goto_state(&st_demo_end);
+        }
     }
     return 1;
 }
 
 /*---------------------------------------------------------------------------*/
 
-#define DEMO_KEEP  0
-#define DEMO_DEL   1
-#define DEMO_QUIT  2
+#define DEMO_KEEP      0
+#define DEMO_DEL       1
+#define DEMO_QUIT      2
+#define DEMO_REPLAY    3
+#define DEMO_CONTINUE  4
 
 static int demo_end_action(int i)
 {
@@ -309,54 +549,93 @@ static int demo_end_action(int i)
 
     switch (i)
     {
-    case DEMO_DEL: 
-       return goto_state(&st_demo_del);
+    case DEMO_DEL:
+        demo_paused = 0;
+        return goto_state(&st_demo_del);
     case DEMO_KEEP:
+        demo_paused = 0;
         demo_replay_stop(0);
         return goto_state(&st_demo);
     case DEMO_QUIT:
-       demo_replay_stop(0);
-       return 0;
+        demo_replay_stop(0);
+        return 0;
+    case DEMO_REPLAY:
+        demo_replay_stop(0);
+        progress_replay(curr_demo());
+        return goto_state(&st_demo_play);
+    case DEMO_CONTINUE:
+        return goto_state(&st_demo_play);
     }
     return 1;
 }
 
-static int demo_end_enter(void)
+static int demo_end_gui(void)
 {
     int id, jd, kd;
 
     if ((id = gui_vstack(0)))
     {
-        kd = gui_label(id, _("Replay Ends"), GUI_MED, GUI_ALL, gui_gry, gui_red);
+        if (demo_paused)
+            kd = gui_label(id, _("Replay Paused"), GUI_LRG, GUI_ALL,
+                           gui_gry, gui_red);
+        else
+            kd = gui_label(id, _("Replay Ends"),   GUI_LRG, GUI_ALL,
+                           gui_gry, gui_red);
 
         if ((jd = gui_harray(id)))
         {
-           if (simple_play)
-                gui_start(jd, _("OK"),   GUI_SML,   DEMO_QUIT, 1);
-           else
-           {
-                gui_state(jd, _("Delete"), GUI_SML, DEMO_DEL,  0);
-                gui_start(jd, _("Keep"),   GUI_SML, DEMO_KEEP, 1);
-           }
+            int start_id = 0;
+
+            if (standalone)
+            {
+                start_id = gui_start(jd, _("Quit"), GUI_SML, DEMO_QUIT, 1);
+            }
+            else
+            {
+                start_id = gui_start(jd, _("Keep"), GUI_SML, DEMO_KEEP, 1);
+                gui_state(jd, _("Delete"), GUI_SML, DEMO_DEL, 0);
+            }
+
+            if (demo_paused)
+            {
+                gui_start(jd, _("Continue"), GUI_SML, DEMO_CONTINUE, 1);
+                gui_toggle(start_id);
+            }
+            else
+                gui_state(jd, _("Repeat"),   GUI_SML, DEMO_REPLAY,   0);
         }
 
         gui_pulse(kd, 1.2f);
         gui_layout(id, 0, 0);
     }
-    audio_music_fade_out(2.0f);
 
     return id;
 }
 
-static void demo_end_timer(int id, float dt)
+static int demo_end_enter(struct state *st, struct state *prev)
 {
-    float g[3] = { 0.0f, -9.8f, 0.0f };
+    audio_music_fade_out(demo_paused ? 0.2f : 2.0f);
 
-    if (time_state() < 2.f)
-       game_step(g, dt, 0);
-               
-    gui_timer(id, dt);
-    audio_timer(dt);
+    return demo_end_gui();
+}
+
+static void demo_end_paint(int id, float t)
+{
+    game_client_draw(0, t, demo_play_blend());
+    gui_paint(id);
+
+    if (demo_paused)
+        hud_paint();
+}
+
+static int demo_end_keybd(int c, int d)
+{
+    if (d)
+    {
+        if (demo_paused && config_tst_d(CONFIG_KEY_PAUSE, c))
+            return demo_end_action(DEMO_CONTINUE);
+    }
+    return 1;
 }
 
 static int demo_end_buttn(int b, int d)
@@ -365,8 +644,14 @@ static int demo_end_buttn(int b, int d)
     {
         if (config_tst_d(CONFIG_JOYSTICK_BUTTON_A, b))
             return demo_end_action(gui_token(gui_click()));
+
         if (config_tst_d(CONFIG_JOYSTICK_BUTTON_EXIT, b))
-            return demo_end_action(simple_play ? DEMO_QUIT : DEMO_KEEP);
+        {
+            if (demo_paused)
+                return demo_end_action(DEMO_CONTINUE);
+            else
+                return demo_end_action(standalone ? DEMO_QUIT : DEMO_KEEP);
+        }
     }
     return 1;
 }
@@ -376,12 +661,11 @@ static int demo_end_buttn(int b, int d)
 static int demo_del_action(int i)
 {
     audio_play(AUD_MENU, 1.0f);
-
     demo_replay_stop(i == DEMO_DEL);
     return goto_state(&st_demo);
 }
 
-static int demo_del_enter(void)
+static int demo_del_gui(void)
 {
     int id, jd, kd;
 
@@ -391,18 +675,24 @@ static int demo_del_enter(void)
 
         if ((jd = gui_harray(id)))
         {
-            gui_state(jd, _("Yes"), GUI_SML, DEMO_DEL,  0);
             gui_start(jd, _("No"),  GUI_SML, DEMO_KEEP, 1);
+            gui_state(jd, _("Yes"), GUI_SML, DEMO_DEL,  0);
         }
 
         gui_pulse(kd, 1.2f);
         gui_layout(id, 0, 0);
     }
-    audio_music_fade_out(2.0f);
 
     return id;
 }
 
+static int demo_del_enter(struct state *st, struct state *prev)
+{
+    audio_music_fade_out(2.0f);
+
+    return demo_del_gui();
+}
+
 static int demo_del_buttn(int b, int d)
 {
     if (d)
@@ -417,17 +707,63 @@ static int demo_del_buttn(int b, int d)
 
 /*---------------------------------------------------------------------------*/
 
+static int demo_compat_gui(void)
+{
+    int id;
+
+    if ((id = gui_vstack(0)))
+    {
+        gui_label(id, _("Warning!"), GUI_MED, GUI_ALL, 0, 0);
+        gui_space(id);
+        gui_multi(id, _("The current replay was recorded with a\\"
+                        "different (or unknown) version of this level.\\"
+                        "Be prepared to encounter visual errors.\\"),
+                  GUI_SML, GUI_ALL, gui_wht, gui_wht);
+
+        gui_layout(id, 0, 0);
+    }
+
+    return id;
+}
+
+static int demo_compat_enter(struct state *st, struct state *prev)
+{
+    check_compat = 0;
+
+    return demo_compat_gui();
+}
+
+static void demo_compat_timer(int id, float dt)
+{
+    game_step_fade(dt);
+    gui_timer(id, dt);
+}
+
+static int demo_compat_buttn(int b, int d)
+{
+    if (d)
+    {
+        if (config_tst_d(CONFIG_JOYSTICK_BUTTON_A, b))
+            return goto_state(&st_demo_play);
+        if (config_tst_d(CONFIG_JOYSTICK_BUTTON_EXIT, b))
+            return goto_state(&st_demo_end);
+    }
+    return 1;
+}
+
+/*---------------------------------------------------------------------------*/
+
 struct state st_demo = {
     demo_enter,
-    shared_leave,
+    demo_leave,
     shared_paint,
-    shared_timer,
+    demo_timer,
     demo_point,
     demo_stick,
+    shared_angle,
     shared_click,
     NULL,
-    demo_buttn,
-    0
+    demo_buttn
 };
 
 struct state st_demo_play = {
@@ -436,24 +772,24 @@ struct state st_demo_play = {
     demo_play_paint,
     demo_play_timer,
     NULL,
+    demo_play_stick,
     NULL,
-    NULL,
-    NULL,
-    demo_play_buttn,
-    0
+    demo_play_click,
+    demo_play_keybd,
+    demo_play_buttn
 };
 
 struct state st_demo_end = {
     demo_end_enter,
     shared_leave,
-    shared_paint,
-    demo_end_timer,
+    demo_end_paint,
+    shared_timer,
     shared_point,
     shared_stick,
+    shared_angle,
     shared_click,
-    NULL,
-    demo_end_buttn,
-    1, 0
+    demo_end_keybd,
+    demo_end_buttn
 };
 
 struct state st_demo_del = {
@@ -463,8 +799,21 @@ struct state st_demo_del = {
     shared_timer,
     shared_point,
     shared_stick,
+    shared_angle,
+    shared_click,
+    NULL,
+    demo_del_buttn
+};
+
+struct state st_demo_compat = {
+    demo_compat_enter,
+    shared_leave,
+    shared_paint,
+    demo_compat_timer,
+    shared_point,
+    shared_stick,
+    shared_angle,
     shared_click,
     NULL,
-    demo_del_buttn,
-    1, 0
+    demo_compat_buttn
 };