X-Git-Url: https://git.artsoft.org/?a=blobdiff_plain;f=src%2Fgame_bd%2Fbd_graphics.c;h=fe2e6b45b87ef1dd191dfe66bb81331d987c2830;hb=f07da7d1b75d43c48bc4c6c4ac698ef119c245f7;hp=43964906918c7e81472904d54d9b13182cc0df4d;hpb=35a2f21580d9bd01f55e1265fc8174cfcbdd5ad9;p=rocksndiamonds.git

diff --git a/src/game_bd/bd_graphics.c b/src/game_bd/bd_graphics.c
index 43964906..fe2e6b45 100644
--- a/src/game_bd/bd_graphics.c
+++ b/src/game_bd/bd_graphics.c
@@ -44,8 +44,8 @@ static Bitmap *gd_tile_bitmap = NULL;
 // pointer to reference tile bitmap (without level-specific colors)
 static Bitmap *gd_tile_bitmap_reference = NULL;
 
-// optional title screen bitmap
-static Bitmap *gd_title_screen_bitmap = NULL;
+// optional title screen bitmaps (foreground and background)
+static Bitmap *gd_title_screen_bitmaps[2] = { NULL, NULL };
 
 // screen area
 Bitmap *gd_screen_bitmap = NULL;
@@ -232,6 +232,38 @@ int get_play_area_h(void)
   return play_area_h / cell_size;
 }
 
+static boolean player_out_of_window(GdGame *game, int player_x, int player_y)
+{
+  // if not yet born, we treat as visible. so cave will run.
+  // the user is unable to control an unborn player, so this is the right behaviour.
+  if (game->cave->player_state == GD_PL_NOT_YET)
+    return FALSE;
+
+  // check if active player is outside drawing area. if yes, we should wait for scrolling
+  if ((player_x * cell_size) < scroll_x ||
+      (player_x * cell_size + cell_size - 1) > scroll_x + play_area_w)
+  {
+    // but only do the wait, if the player SHOULD BE visible, ie. he is inside
+    // the defined visible area of the cave
+    if (game->cave->player_x >= game->cave->x1 &&
+	game->cave->player_x <= game->cave->x2)
+      return TRUE;
+  }
+
+  if ((player_y * cell_size) < scroll_y ||
+      (player_y * cell_size + cell_size - 1) > scroll_y + play_area_h)
+  {
+    // but only do the wait, if the player SHOULD BE visible, ie. he is inside
+    // the defined visible area of the cave
+    if (game->cave->player_y >= game->cave->y1 &&
+	game->cave->player_y <= game->cave->y2)
+      return TRUE;
+  }
+
+  // player is inside visible window
+  return FALSE;
+}
+
 /*
   SCROLLING
   
@@ -242,7 +274,7 @@ int get_play_area_h(void)
 boolean gd_scroll(GdGame *game, boolean exact_scroll, boolean immediate)
 {
   static int scroll_desired_x = 0, scroll_desired_y = 0;
-  boolean out_of_window;
+  static int scroll_speed_last = -1;
   int player_x, player_y, visible_x, visible_y;
   boolean changed;
 
@@ -264,13 +296,18 @@ boolean gd_scroll(GdGame *game, boolean exact_scroll, boolean immediate)
   player_x = game->cave->player_x - game->cave->x1; // cell coordinates of player
   player_y = game->cave->player_y - game->cave->y1;
 
-  // when wrapping around to opposite level border, use faster scrolling
-  if (game->cave->player_x == game->cave->x1 ||
-      game->cave->player_x == game->cave->x2 ||
-      game->cave->player_y == game->cave->y1 ||
-      game->cave->player_y == game->cave->y2)
+  // if player is outside visible playfield area, use faster scrolling
+  // (might happen when wrapping around the playfield, teleporting etc.)
+  if (player_out_of_window(game, player_x, player_y))
     scroll_speed *= 4;
 
+  // if scrolling started with player outside visible playfield area, keep faster scrolling
+  if (scroll_speed_last > scroll_speed)
+    scroll_speed = scroll_speed_last;
+
+  // store current (potentially faster) scrolling speed for next time
+  scroll_speed_last = scroll_speed;
+
   // pixel size of visible part of the cave (may be smaller in intermissions)
   visible_x = (game->cave->x2 - game->cave->x1 + 1) * cell_size;
   visible_y = (game->cave->y2 - game->cave->y1 + 1) * cell_size;
@@ -296,34 +333,12 @@ boolean gd_scroll(GdGame *game, boolean exact_scroll, boolean immediate)
 	game->gfx_buffer[y][x] |= GD_REDRAW;
   }
 
-  // check if active player is visible at the moment.
-  out_of_window = FALSE;
-
-  // check if active player is outside drawing area. if yes, we should wait for scrolling
-  if ((player_x * cell_size) < scroll_x ||
-      (player_x * cell_size + cell_size - 1) > scroll_x + play_area_w)
-  {
-    // but only do the wait, if the player SHOULD BE visible, ie. he is inside
-    // the defined visible area of the cave
-    if (game->cave->player_x >= game->cave->x1 &&
-	game->cave->player_x <= game->cave->x2)
-      out_of_window = TRUE;
-  }
-
-  if ((player_y * cell_size) < scroll_y ||
-      (player_y * cell_size + cell_size - 1) > scroll_y + play_area_h)
-    // but only do the wait, if the player SHOULD BE visible, ie. he is inside
-    // the defined visible area of the cave
-    if (game->cave->player_y >= game->cave->y1 &&
-	game->cave->player_y <= game->cave->y2)
-      out_of_window = TRUE;
+  // if no scrolling required, reset last (potentially faster) scrolling speed
+  if (!changed)
+    scroll_speed_last = -1;
 
-  // if not yet born, we treat as visible. so cave will run.
-  // the user is unable to control an unborn player, so this is the right behaviour.
-  if (game->cave->player_state == GD_PL_NOT_YET)
-    return FALSE;
-
-  return out_of_window;
+  // check if active player is visible at the moment.
+  return player_out_of_window(game, player_x, player_y);
 }
 
 // returns true, if the given surface seems to be a c64 imported image.
@@ -765,60 +780,66 @@ static SDL_Surface *get_surface_from_base64(const char *base64_data)
   return surface;
 }
 
-static SDL_Surface *get_title_screen_surface(void)
+static SDL_Surface *get_title_screen_background_surface(SDL_Surface *tile)
 {
-  if (gd_caveset_data == NULL || gd_caveset_data->title_screen == NULL)
+  if (tile == NULL)
     return NULL;
 
-  SDL_Surface *surface = get_surface_from_base64(gd_caveset_data->title_screen);
+  SDL_Surface *foreground_surface = gd_title_screen_bitmaps[0]->surface_masked;
 
-  if (surface == NULL)
+  // if foreground image has no transparency, no background image needed
+  if (foreground_surface->format->Amask == 0)
     return NULL;
 
-  // create target surface
-  SDL_Surface *target = SDL_CreateRGBSurface(0, surface->w, surface->h, 32, 0, 0, 0, 0);
+  // use foreground image size for background image size
+  int w = foreground_surface->w;
+  int h = foreground_surface->h + tile->h;	// background is one scrolling tile higher
 
-  // check for transparency and background tile
-  if (surface->format->Amask != 0 && gd_caveset_data->title_screen_scroll != NULL)
-  {
-    SDL_Surface *tile = get_surface_from_base64(gd_caveset_data->title_screen_scroll);
+  // create background surface
+  SDL_Surface *back = SDL_CreateRGBSurface(0, w, h, 32, 0, 0, 0, 0);
+  int x, y;
 
-    if (tile != NULL)
-    {
-      int x, y;
+  // fill background surface with tile
+  for (y = 0; y < h; y += tile->h)
+    for (x = 0; x < w; x += tile->w)
+      SDLBlitSurface(tile, back, 0, 0, tile->w, tile->h, x, y);
 
-      // create background surface
-      SDL_Surface *back = SDL_CreateRGBSurface(0, surface->w, surface->h, 32, 0, 0, 0, 0);
+  // background tile surface not needed anymore
+  SDL_FreeSurface(tile);
 
-      // fill background surface with tile
-      for (y = 0; y < surface->h; y += tile->h)
-        for (x = 0; x < surface->w; x += tile->w)
-	  SDLBlitSurface(tile, back, 0, 0, tile->w, tile->h, x, y);
+  return back;
+}
 
-      // copy masked screen over background surface
-      SDLBlitSurface(back, target, 0, 0, surface->w, surface->h, 0, 0);
+static SDL_Surface *get_title_screen_surface(int nr)
+{
+  if (gd_caveset_data == NULL)
+    return NULL;
 
-      // free temporary surfaces
-      SDL_FreeSurface(tile);
-      SDL_FreeSurface(back);
-    }
-  }
+  // do not use title screen background without foreground image
+  if (nr == 1 && gd_title_screen_bitmaps[0] == NULL)
+    return NULL;
 
-  SDLBlitSurface(surface, target, 0, 0, surface->w, surface->h, 0, 0);
+  char *data = (nr == 0 ? gd_caveset_data->title_screen : gd_caveset_data->title_screen_scroll);
 
-  SDL_FreeSurface(surface);
+  if (data == NULL)
+    return NULL;
+
+  SDL_Surface *surface = get_surface_from_base64(data);
+
+  if (surface == NULL)
+    return NULL;
 
-  return target;
+  return (nr == 0 ? surface : get_title_screen_background_surface(surface));
 }
 
-static void set_title_screen_bitmap(void)
+static void set_title_screen_bitmap(int nr)
 {
-  if (gd_title_screen_bitmap != NULL)
-    FreeBitmap(gd_title_screen_bitmap);
+  if (gd_title_screen_bitmaps[nr] != NULL)
+    FreeBitmap(gd_title_screen_bitmaps[nr]);
 
-  gd_title_screen_bitmap = NULL;
+  gd_title_screen_bitmaps[nr] = NULL;
 
-  SDL_Surface *surface = get_title_screen_surface();
+  SDL_Surface *surface = get_title_screen_surface(nr);
 
   if (surface == NULL)
     return;
@@ -827,13 +848,21 @@ static void set_title_screen_bitmap(void)
   int height_scaled = surface->h * 2;
   SDL_Surface *surface_scaled = SDLZoomSurface(surface, width_scaled, height_scaled);
 
-  gd_title_screen_bitmap = SDLGetBitmapFromSurface(surface_scaled);
+  gd_title_screen_bitmaps[nr] = SDLGetBitmapFromSurface(surface_scaled);
 
   SDL_FreeSurface(surface);
   SDL_FreeSurface(surface_scaled);
 }
 
-Bitmap *gd_get_title_screen_bitmap(void)
+static void set_title_screen_bitmaps(void)
+{
+  int i;
+
+  for (i = 0; i < 2; i++)
+    set_title_screen_bitmap(i);
+}
+
+Bitmap **gd_get_title_screen_bitmaps(void)
 {
   static char *levelset_subdir_last = NULL;
 
@@ -846,9 +875,9 @@ Bitmap *gd_get_title_screen_bitmap(void)
 
   // check if stored cave set has changed
   if (!strEqual(gd_caveset_data->levelset_subdir, levelset_subdir_last))
-    set_title_screen_bitmap();
+    set_title_screen_bitmaps();
 
   setString(&levelset_subdir_last, gd_caveset_data->levelset_subdir);
 
-  return gd_title_screen_bitmap;
+  return gd_title_screen_bitmaps;
 }