play_area_h = h;
}
-void gd_init_keystate(void)
+void gd_init_play_area(void)
{
set_play_area(SXSIZE, SYSIZE);
}
return has_c64_colors;
}
+boolean gd_bitmap_has_c64_colors(Bitmap *bitmap)
+{
+ return surface_has_c64_colors(bitmap->surface);
+}
+
// 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)
{
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(surface);
+ tile_bitmap_c64 = SDLGetBitmapFromSurface_WithMaskedColor(surface, bg_r, bg_g, bg_b);
return tile_bitmap_c64;
}
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 el_collectible(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 el_explosion(const int element)
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];
- Bitmap *tile_bitmap = gd_get_tile_bitmap(g->bitmap);
- boolean is_movable = (el_can_move(tile) || el_falling(tile) || el_pushable(tile) ||
- el_player(tile));
- boolean is_movable_or_diggable = (is_movable || el_diggable(game->last_element_buffer[y][x]));
- boolean is_moving = (is_movable_or_diggable && dir != GD_MV_STILL);
+ 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 (el_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;
// if game element not moving (or no smooth movements requested), simply draw tile
if (!is_moving || !use_smooth_movements)
{
+ 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 diggable (like dirt etc.)
- if (!el_diggable(tile_last))
- tile_last = O_SPACE;
-
- struct GraphicInfo_BD *g_old = &graphic_info_bd_object[tile_last][frame];
- Bitmap *tile_bitmap_old = gd_get_tile_bitmap(g_old->bitmap);
-
- blit_bitmap(tile_bitmap_old, 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] & ~SKIPPED; // should never be skipped
- struct GraphicInfo_BD *g_from = &graphic_info_bd_object[tile_from][frame];
- Bitmap *tile_bitmap_from = gd_get_tile_bitmap(g_from->bitmap);
- boolean old_is_player = el_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(tile_bitmap_from, 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
- // (but redraw if tile and old tile are moving/falling into different directions)
- if (game->dir_buffer[old_y][old_x] == game->dir_buffer[y][x])
- 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(tile_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 ----------
- // special case: redraw player snapping a game element
- if (old_is_visible && old_is_player && !old_is_moving)
+ if (is_moving_from)
{
- // redraw game element on the cave field the element is moving from
- blit_bitmap(tile_bitmap_from, 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_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 ----------
+
+ if (is_moving_to)
+ {
+ 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;
projects / rocksndiamonds.git / blobdiff