#define GD_KEY_CHAR 12
#define GD_COMMENT_CHAR 13
+// pointer to tile bitmap (which may be prepared with level-specific colors)
+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 bitmaps (foreground and background)
+static Bitmap *gd_title_screen_bitmaps[2] = { NULL, NULL };
+
// screen area
Bitmap *gd_screen_bitmap = NULL;
// quit, global variable which is set to true if the application should quit
boolean gd_quit = FALSE;
-const byte *gd_keystate;
-
static int cell_size = 0;
// graphic info for game objects/frames and players/actions/frames
struct GraphicInfo_BD graphic_info_bd_object[O_MAX_ALL][8];
+// graphic info for game graphics template for level-specific colors
+struct GraphicInfo_BD graphic_info_bd_color_template;
+
+static inline int c64_png_colors(int r, int g, int b, int a)
+{
+ static const int c64_png_cols[] =
+ {
+ // ABGR
+
+ /* 0000 */ 0, // transparent
+ /* 0001 */ 0,
+ /* 0010 */ 0,
+ /* 0011 */ 0,
+ /* 0100 */ 0,
+ /* 0101 */ 0,
+ /* 0110 */ 0,
+ /* 0111 */ 0,
+ /* 1000 */ 1, // black - background
+ /* 1001 */ 2, // red - foreg1
+ /* 1010 */ 5, // green - amoeba
+ /* 1011 */ 4, // yellow - foreg3
+ /* 1100 */ 6, // blue - slime
+ /* 1101 */ 3, // purple - foreg2
+ /* 1110 */ 7, // black around arrows (used in editor) is coded as cyan
+ /* 1111 */ 8, // white is the arrow
+ };
+
+ int c = ((a >> 7) * 8 +
+ (b >> 7) * 4 +
+ (g >> 7) * 2 +
+ (r >> 7) * 1);
+
+ return c64_png_cols[c];
+}
void set_cell_size(int s)
{
play_area_h = h;
}
-void gd_init_keystate(void)
+void gd_init_play_area(void)
{
set_play_area(SXSIZE, SYSIZE);
-
- gd_keystate = SDL_GetKeyboardState(NULL);
}
/*
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
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;
player_x = game->cave->player_x - game->cave->x1; // cell coordinates of player
player_y = game->cave->player_y - game->cave->y1;
+ // 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;
game->gfx_buffer[y][x] |= GD_REDRAW;
}
+ // if no scrolling required, reset last (potentially faster) scrolling speed
+ if (!changed)
+ scroll_speed_last = -1;
+
// check if active player is visible at the moment.
- out_of_window = FALSE;
+ return player_out_of_window(game, player_x, player_y);
+}
- // 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)
+// returns true, if the given surface seems to be a c64 imported image.
+static boolean surface_has_c64_colors(SDL_Surface *surface)
+{
+ boolean has_c64_colors = TRUE; // default: assume C64 colors
+ const unsigned char *p;
+ int x, y;
+
+ if (surface->format->BytesPerPixel != 4)
+ return FALSE;
+
+ SDL_LockSurface(surface);
+
+ for (y = 0; y < surface->h && has_c64_colors; y++)
{
- // 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;
+ p = ((unsigned char *)surface->pixels) + y * surface->pitch;
+
+ for (x = 0; x < surface->w * surface->format->BytesPerPixel && has_c64_colors; x++)
+ if (p[x] != 0 && p[x] != 255)
+ has_c64_colors = FALSE;
}
- 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;
+ SDL_UnlockSurface(surface);
- // 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 has_c64_colors;
+}
- return out_of_window;
+boolean gd_bitmap_has_c64_colors(Bitmap *bitmap)
+{
+ return surface_has_c64_colors(bitmap->surface);
}
-#if DO_GFX_SANITY_CHECK
-// workaround to prevent variable name scope problem
-static boolean use_native_bd_graphics_engine(void)
+// sets one of the colors in the indexed palette of an sdl surface to a GdColor.
+static void set_surface_palette_color(SDL_Surface *surface, int index, GdColor col)
{
- return game.use_native_bd_graphics_engine;
+ if (surface->format->BytesPerPixel != 1)
+ return;
+
+ SDL_Color c;
+
+ c.r = gd_color_get_r(col);
+ c.g = gd_color_get_g(col);
+ c.b = gd_color_get_b(col);
+
+ SDL_SetPaletteColors(surface->format->palette, &c, index, 1);
+}
+
+// takes a c64_gfx.png-coded 32-bit surface, and creates a paletted surface in our internal format.
+static SDL_Surface *get_tile_surface_c64(SDL_Surface *surface, int scale_down_factor)
+{
+ static SDL_Surface *tile_surface_c64 = NULL;
+ static unsigned char *pixels = NULL;
+ int width = surface->w;
+ int height = surface->h;
+ int out = 0;
+ int x, y;
+
+ if (!surface_has_c64_colors(surface))
+ return NULL;
+
+ if (surface->format->BytesPerPixel != 4)
+ Fail("C64 style surface has wrong color depth -- should not happen");
+
+ if (tile_surface_c64 != NULL)
+ SDL_FreeSurface(tile_surface_c64);
+
+ checked_free(pixels);
+
+ pixels = checked_malloc(width * height);
+
+ SDL_LockSurface(surface);
+
+ for (y = 0; y < height; y++)
+ {
+ unsigned int *p = (unsigned int *)((char *)surface->pixels + y * surface->pitch);
+
+ for (x = 0; x < width; x++)
+ {
+ int r = (p[x] & surface->format->Rmask) >> surface->format->Rshift << surface->format->Rloss;
+ int g = (p[x] & surface->format->Gmask) >> surface->format->Gshift << surface->format->Gloss;
+ int b = (p[x] & surface->format->Bmask) >> surface->format->Bshift << surface->format->Bloss;
+ // should be:
+ // a = (p[x]&surface->format->Amask) >> surface->format->Ashift << surface->format->Aloss;
+ // but we do not use the alpha channel in sdash, so we just use 255 (max alpha)
+
+ pixels[out++] = c64_png_colors(r, g, b, 255);
+ }
+ }
+
+ SDL_UnlockSurface(surface);
+
+ // create new surface from pixel data
+ tile_surface_c64 =
+ SDL_CreateRGBSurfaceFrom((void *)pixels, width, height, 8, width, 0, 0, 0, 0);
+
+ if (tile_surface_c64 == NULL)
+ Fail("SDL_CreateRGBSurfaceFrom() failed: %s", SDL_GetError());
+
+ if (scale_down_factor > 1)
+ {
+ SDL_Surface *surface_old = tile_surface_c64;
+ int width_scaled = width / scale_down_factor;
+ int height_scaled = height / scale_down_factor;
+
+ // replace surface with scaled-down variant
+ tile_surface_c64 = SDLZoomSurface(surface_old, width_scaled, height_scaled);
+
+ // free previous (non-scaled) surface
+ SDL_FreeSurface(surface_old);
+ }
+
+ return tile_surface_c64;
+}
+
+static Bitmap *get_tile_bitmap_c64(GdCave *cave, SDL_Surface *surface)
+{
+ static Bitmap *tile_bitmap_c64 = NULL;
+
+ if (surface == NULL)
+ return NULL;
+
+ if (tile_bitmap_c64 != NULL)
+ FreeBitmap(tile_bitmap_c64);
+
+ // set surface color palette to cave colors
+ set_surface_palette_color(surface, 0, 0);
+ set_surface_palette_color(surface, 1, gd_color_get_rgb(cave->color0));
+ set_surface_palette_color(surface, 2, gd_color_get_rgb(cave->color1));
+ set_surface_palette_color(surface, 3, gd_color_get_rgb(cave->color2));
+ set_surface_palette_color(surface, 4, gd_color_get_rgb(cave->color3));
+ set_surface_palette_color(surface, 5, gd_color_get_rgb(cave->color4));
+ set_surface_palette_color(surface, 6, gd_color_get_rgb(cave->color5));
+ set_surface_palette_color(surface, 7, 0);
+ set_surface_palette_color(surface, 8, 0);
+
+ // set background color to be transparent for masked tile bitmap
+ int bg_color = gd_color_get_rgb(cave->color0);
+ int bg_r = gd_color_get_r(bg_color);
+ int bg_g = gd_color_get_g(bg_color);
+ int bg_b = gd_color_get_b(bg_color);
+
+ // create bitmap from C64 surface
+ tile_bitmap_c64 = SDLGetBitmapFromSurface_WithMaskedColor(surface, bg_r, bg_g, bg_b);
+
+ return tile_bitmap_c64;
+}
+
+void gd_prepare_tile_bitmap(GdCave *cave, Bitmap *bitmap, int scale_down_factor)
+{
+ static SDL_Surface *tile_surface_c64 = NULL;
+ static Bitmap *gd_tile_bitmap_original = NULL;
+ static int scale_down_factor_last = -1;
+
+ if (program.headless)
+ return;
+
+ // check if tile bitmap has changed (different artwork or tile size selected)
+ if (bitmap != gd_tile_bitmap_original || scale_down_factor != scale_down_factor_last)
+ {
+ // check if tile bitmap has limited C64 style colors
+ tile_surface_c64 = get_tile_surface_c64(bitmap->surface, scale_down_factor);
+
+ // store original tile bitmap from current artwork set and scaling factor
+ gd_tile_bitmap_original = bitmap;
+ scale_down_factor_last = scale_down_factor;
+
+ // store reference tile bitmap from current artwork set (may be changed later)
+ gd_tile_bitmap_reference = bitmap;
+ }
+
+ // check if tile bitmap should be colored for next game
+ if (tile_surface_c64 != NULL)
+ {
+ // set tile bitmap to bitmap with level-specific colors
+ gd_tile_bitmap = get_tile_bitmap_c64(cave, tile_surface_c64);
+ }
+ else
+ {
+ // no special tile bitmap available for this artwork set
+ gd_tile_bitmap = NULL;
+ }
+}
+
+void gd_set_tile_bitmap_reference(Bitmap *bitmap)
+{
+ gd_tile_bitmap_reference = bitmap;
+}
+
+Bitmap *gd_get_tile_bitmap(Bitmap *bitmap)
+{
+ // if no special tile bitmap available, keep using default tile bitmap
+ if (gd_tile_bitmap == NULL)
+ return bitmap;
+
+ // if default bitmap refers to tile bitmap, use special tile bitmap
+ if (bitmap == gd_tile_bitmap_reference)
+ return gd_tile_bitmap;
+
+ return bitmap;
}
-#endif
// returns true if the element is a player
-static inline boolean is_player(const int element)
+static inline boolean el_player(const int element)
{
return (gd_elements[element & O_MASK].properties & P_PLAYER) != 0;
}
+// returns true if the element is walkable
+static inline boolean el_walkable(const int element)
+{
+ return (gd_elements[element & O_MASK].properties & P_WALKABLE) != 0;
+}
+
+// returns true if the element is diggable
+static inline boolean el_diggable(const int element)
+{
+ return (gd_elements[element & O_MASK].properties & P_DIGGABLE) != 0;
+}
+
+#if 0
// returns true if the element is collectible
-static inline boolean is_collectible(const int element)
+static inline boolean el_collectible(const int element)
{
return (gd_elements[element & O_MASK].properties & P_COLLECTIBLE) != 0;
}
+// returns true if the element is pushable
+static inline boolean el_pushable(const int element)
+{
+ return (gd_elements[element & O_MASK].properties & P_PUSHABLE) != 0;
+}
+
+// returns true if the element can move
+static inline boolean el_can_move(const int element)
+{
+ return (gd_elements[element & O_MASK].properties & P_CAN_MOVE) != 0;
+}
+
+// returns true if the element can fall
+static inline boolean el_falling(const int element)
+{
+ return (gd_elements[element & O_MASK].properties & P_FALLING) != 0;
+}
+#endif
+
+// returns true if the element is growing
+static inline boolean el_growing(const int element)
+{
+ return (gd_elements[element & O_MASK].properties & P_GROWING) != 0;
+}
+
// returns true if the element is exploding
-static inline boolean is_explosion(const int element)
+static inline boolean el_explosion(const int element)
{
return (gd_elements[element & O_MASK].properties & P_EXPLOSION) != 0;
}
GdCave *cave = game->cave;
int sx = x * cell_size - scroll_x;
int sy = y * cell_size - scroll_y;
- int dir = game->dir_buffer[y][x];
+ int dir_from = game->dir_buffer_from[y][x];
+ int dir_to = game->dir_buffer_to[y][x];
int tile = game->element_buffer[y][x];
+ int tile_last = game->last_element_buffer[y][x];
+ int tile_from = O_NONE; // source element if element is moving (will be set later)
+ int tile_to = tile; // target element if element is moving
int frame = game->animcycle;
- struct GraphicInfo_BD *g = &graphic_info_bd_object[tile][frame];
- boolean use_smooth_movements =
- ((setup.bd_smooth_movements == TRUE) ||
- (setup.bd_smooth_movements == AUTO && !use_native_bd_graphics_engine()));
+ boolean is_moving_from = (dir_from != GD_MV_STILL);
+ boolean is_moving_to = (dir_to != GD_MV_STILL);
+ boolean is_moving = (is_moving_from || is_moving_to);
+ boolean use_smooth_movements = use_bd_smooth_movements();
- // do not use smooth movement animation for exploding game elements (like player)
- if (is_explosion(tile) && dir != GD_MV_STILL)
- use_smooth_movements = FALSE;
+ // if element is moving away from this tile, determine element that is moving
+ if (is_moving_from)
+ {
+ int dx = (dir_from == GD_MV_LEFT ? -1 : dir_from == GD_MV_RIGHT ? +1 : 0);
+ int dy = (dir_from == GD_MV_UP ? -1 : dir_from == GD_MV_DOWN ? +1 : 0);
+ int new_x = cave->getx(cave, x + dx, y + dy);
+ int new_y = cave->gety(cave, x + dx, y + dy);
+
+ tile_from = game->element_buffer[new_y][new_x];
+
+ // handle special case of player running into enemy/explosion from top or left side
+ if ((el_growing(tile_from) || el_explosion(tile_from)) && el_player(tile_last))
+ tile_from = tile_last;
+ }
+
+ // --------------------------------------------------------------------------------
+ // check if we should use smooth movement animations or not
+ // --------------------------------------------------------------------------------
// do not use smooth movement animation for player entering exit (engine stopped)
if (cave->player_state == GD_PL_EXITED)
use_smooth_movements = FALSE;
+ // never treat empty space as "moving" (source tile if player is snapping)
+ if (tile_from == O_SPACE)
+ use_smooth_movements = FALSE;
+
+ // do not use smooth movement animation for player stirring the pot
+ if (tile_from == O_PLAYER_STIRRING || tile_to == O_PLAYER_STIRRING)
+ use_smooth_movements = FALSE;
+
+ // do not use smooth movement animation for growing or exploding game elements
+ if (el_growing(tile) || el_explosion(tile))
+ use_smooth_movements = FALSE;
+
#if DO_GFX_SANITY_CHECK
if (use_native_bd_graphics_engine() && !setup.small_game_graphics && !program.headless)
{
+ struct GraphicInfo_BD *g = &graphic_info_bd_object[tile][frame];
int old_x = (game->gfx_buffer[y][x] % GD_NUM_OF_CELLS) % GD_NUM_OF_CELLS_X;
int old_y = (game->gfx_buffer[y][x] % GD_NUM_OF_CELLS) / GD_NUM_OF_CELLS_X;
int new_x = g->src_x / g->width;
#endif
// if game element not moving (or no smooth movements requested), simply draw tile
- if (dir == GD_MV_STILL || !use_smooth_movements)
+ if (!is_moving || !use_smooth_movements)
{
- blit_bitmap(g->bitmap, dest, g->src_x, g->src_y, cell_size, cell_size, sx, sy);
+ struct GraphicInfo_BD *g = &graphic_info_bd_object[tile][frame];
+ Bitmap *tile_bitmap = gd_get_tile_bitmap(g->bitmap);
+
+ blit_bitmap(tile_bitmap, dest, g->src_x, g->src_y, cell_size, cell_size, sx, sy);
return;
}
+ // --------------------------------------------------------------------------------
// draw smooth animation for game element moving between two cave tiles
+ // --------------------------------------------------------------------------------
- if (!(game->last_element_buffer[y][x] & SKIPPED))
- {
- // redraw previous game element on the cave field the new element is moving to
- int tile_last = game->last_element_buffer[y][x];
-
- // only redraw previous game element if it is not collectible (like dirt etc.)
- if (is_collectible(tile_last))
- tile_last = O_SPACE;
-
- struct GraphicInfo_BD *g_old = &graphic_info_bd_object[tile_last][frame];
-
- blit_bitmap(g_old->bitmap, dest, g_old->src_x, g_old->src_y, cell_size, cell_size, sx, sy);
- }
-
- // get cave field position the game element is moving from
- int dx = (dir == GD_MV_LEFT ? +1 : dir == GD_MV_RIGHT ? -1 : 0);
- int dy = (dir == GD_MV_UP ? +1 : dir == GD_MV_DOWN ? -1 : 0);
- int old_x = cave->getx(cave, x + dx, y + dy);
- int old_y = cave->gety(cave, x + dx, y + dy);
- int tile_from = game->element_buffer[old_y][old_x];
- struct GraphicInfo_BD *g_from = &graphic_info_bd_object[tile_from][frame];
- boolean old_is_player = is_player(tile_from);
- boolean old_is_moving = (game->dir_buffer[old_y][old_x] != GD_MV_STILL);
- boolean old_is_visible = (old_x >= cave->x1 &&
- old_x <= cave->x2 &&
- old_y >= cave->y1 &&
- old_y <= cave->y2);
-
- if (old_is_visible)
+ // ---------- 1st step: draw background element for this tile ----------
{
- if (!old_is_moving && !old_is_player)
- {
- // redraw game element on the cave field the element is moving from
- blit_bitmap(g_from->bitmap, dest, g_from->src_x, g_from->src_y, cell_size, cell_size,
- sx + dx * cell_size, sy + dy * cell_size);
+ int tile_back = (!is_moving_to ? tile : el_diggable(tile_last) ? tile_last : O_SPACE);
+ struct GraphicInfo_BD *g = &graphic_info_bd_object[tile_back][frame];
+ Bitmap *tile_bitmap = gd_get_tile_bitmap(g->bitmap);
- game->element_buffer[old_y][old_x] |= SKIPPED;
- }
- else
- {
- // if old tile also moving (like pushing player), do not redraw tile background
- game->last_element_buffer[old_y][old_x] |= SKIPPED;
- }
+ blit_bitmap(tile_bitmap, dest, g->src_x, g->src_y, cell_size, cell_size, sx, sy);
}
// get shifted position between cave fields the game element is moving from/to
int itercycle = MIN(MAX(0, game->itermax - game->itercycle - 1), game->itermax);
int shift = cell_size * itercycle / game->itermax;
- blit_bitmap(g->bitmap, dest, g->src_x, g->src_y, cell_size, cell_size,
- sx + dx * shift, sy + dy * shift);
+ // ---------- 2nd step: draw element that is moving away from this tile ----------
+
+ if (is_moving_from)
+ {
+ struct GraphicInfo_BD *g = &graphic_info_bd_object[tile_from][frame];
+ Bitmap *tile_bitmap = gd_get_tile_bitmap(g->bitmap);
+ int dx = (dir_from == GD_MV_LEFT ? -1 : dir_from == GD_MV_RIGHT ? +1 : 0);
+ int dy = (dir_from == GD_MV_UP ? -1 : dir_from == GD_MV_DOWN ? +1 : 0);
+ int xsize = (dx != 0 ? shift : cell_size);
+ int ysize = (dy != 0 ? shift : cell_size);
+ int gx = g->src_x + (dx < 0 ? cell_size - shift : 0);
+ int gy = g->src_y + (dy < 0 ? cell_size - shift : 0);
+ int tx = sx + (dx < 0 ? 0 : dx > 0 ? cell_size - shift : 0);
+ int ty = sy + (dy < 0 ? 0 : dy > 0 ? cell_size - shift : 0);
+
+ if (el_walkable(tile))
+ blit_bitmap = BlitBitmapMasked;
+
+ blit_bitmap(tile_bitmap, dest, gx, gy, xsize, ysize, tx, ty);
+
+ // when using dynamic scheduling (mainly BD1 levels), redraw tile in next frame
+ game->gfx_buffer[y][x] |= GD_REDRAW;
+ }
+
+ // ---------- 3rd step: draw element that is moving towards this tile ----------
- // special case: redraw player snapping a game element
- if (old_is_visible && old_is_player && !old_is_moving)
+ if (is_moving_to)
{
- // redraw game element on the cave field the element is moving from
- blit_bitmap(g_from->bitmap, dest, g_from->src_x, g_from->src_y, cell_size, cell_size,
- sx + dx * cell_size, sy + dy * cell_size);
+ struct GraphicInfo_BD *g = &graphic_info_bd_object[tile_to][frame];
+ Bitmap *tile_bitmap = gd_get_tile_bitmap(g->bitmap);
+ int dx = (dir_to == GD_MV_LEFT ? +1 : dir_to == GD_MV_RIGHT ? -1 : 0);
+ int dy = (dir_to == GD_MV_UP ? +1 : dir_to == GD_MV_DOWN ? -1 : 0);
+ int xsize = (dx != 0 ? cell_size - shift : cell_size);
+ int ysize = (dy != 0 ? cell_size - shift : cell_size);
+ int gx = g->src_x + (dx < 0 ? shift : 0);
+ int gy = g->src_y + (dy < 0 ? shift : 0);
+ int tx = sx + (dx < 0 ? 0 : dx > 0 ? shift : 0);
+ int ty = sy + (dy < 0 ? 0 : dy > 0 ? shift : 0);
+
+ if (is_moving_from)
+ blit_bitmap = BlitBitmapMasked;
+
+ blit_bitmap(tile_bitmap, dest, gx, gy, xsize, ysize, tx, ty);
+
+ // when using dynamic scheduling (mainly BD1 levels), redraw tile in next frame
+ game->gfx_buffer[y][x] |= GD_REDRAW;
}
}
{
if (redraw_all ||
game->gfx_buffer[y][x] & GD_REDRAW ||
- game->dir_buffer[y][x] != GD_MV_STILL)
+ game->dir_buffer_from[y][x] != GD_MV_STILL ||
+ game->dir_buffer_to[y][x] != GD_MV_STILL)
{
- // skip redrawing already drawn element with movement
- if (game->element_buffer[y][x] & SKIPPED)
- continue;
-
// now we have drawn it
game->gfx_buffer[y][x] = game->gfx_buffer[y][x] & ~GD_REDRAW;
return 0;
}
+
+static SDL_Surface *get_surface_from_raw_data(const unsigned char *data, int size)
+{
+ SDL_RWops *rwop = SDL_RWFromConstMem(data, size);
+ SDL_Surface *surface = IMG_Load_RW(rwop, 1); // 1 = automatically closes rwop
+
+ return surface;
+}
+
+static SDL_Surface *get_surface_from_base64(const char *base64_data)
+{
+ int decoded_data_size = base64_decoded_size(base64_data);
+ unsigned char *decoded_data = checked_malloc(decoded_data_size);
+
+ base64_decode(decoded_data, base64_data);
+
+ SDL_Surface *surface = get_surface_from_raw_data(decoded_data, decoded_data_size);
+
+ checked_free(decoded_data);
+
+ return surface;
+}
+
+static SDL_Surface *get_title_screen_background_surface(SDL_Surface *tile)
+{
+ if (tile == NULL)
+ return NULL;
+
+ SDL_Surface *foreground_surface = gd_title_screen_bitmaps[0]->surface_masked;
+
+ // if foreground image has no transparency, no background image needed
+ if (foreground_surface->format->Amask == 0)
+ return NULL;
+
+ // 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
+
+ // create background surface
+ SDL_Surface *back = SDL_CreateRGBSurface(0, w, h, 32, 0, 0, 0, 0);
+ 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);
+
+ // background tile surface not needed anymore
+ SDL_FreeSurface(tile);
+
+ return back;
+}
+
+static SDL_Surface *get_title_screen_surface(int nr)
+{
+ if (gd_caveset_data == NULL)
+ return NULL;
+
+ // do not use title screen background without foreground image
+ if (nr == 1 && gd_title_screen_bitmaps[0] == NULL)
+ return NULL;
+
+ char *data = (nr == 0 ? gd_caveset_data->title_screen : gd_caveset_data->title_screen_scroll);
+
+ if (data == NULL)
+ return NULL;
+
+ SDL_Surface *surface = get_surface_from_base64(data);
+
+ if (surface == NULL)
+ return NULL;
+
+ return (nr == 0 ? surface : get_title_screen_background_surface(surface));
+}
+
+static void set_title_screen_bitmap(int nr)
+{
+ if (gd_title_screen_bitmaps[nr] != NULL)
+ FreeBitmap(gd_title_screen_bitmaps[nr]);
+
+ gd_title_screen_bitmaps[nr] = NULL;
+
+ SDL_Surface *surface = get_title_screen_surface(nr);
+
+ if (surface == NULL)
+ return;
+
+ int width_scaled = surface->w * 2;
+ int height_scaled = surface->h * 2;
+ SDL_Surface *surface_scaled = SDLZoomSurface(surface, width_scaled, height_scaled);
+
+ gd_title_screen_bitmaps[nr] = SDLGetBitmapFromSurface(surface_scaled);
+
+ SDL_FreeSurface(surface);
+ SDL_FreeSurface(surface_scaled);
+}
+
+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;
+
+ if (gd_caveset_data == NULL || gd_caveset_data->title_screen == NULL)
+ return NULL;
+
+ // check if stored cave set is used as current level set (may be outdated)
+ if (!strEqual(gd_caveset_data->levelset_subdir, leveldir_current->subdir))
+ return NULL;
+
+ // check if stored cave set has changed
+ if (!strEqual(gd_caveset_data->levelset_subdir, levelset_subdir_last))
+ set_title_screen_bitmaps();
+
+ setString(&levelset_subdir_last, gd_caveset_data->levelset_subdir);
+
+ return gd_title_screen_bitmaps;
+}
projects / rocksndiamonds.git / blobdiff