* graphics manipulation crap
*/
-#include "global.h"
-#include "display.h"
-#include "level.h"
+#include "main_em.h"
+#define MIN_SCREEN_XPOS_RAW 0
+#define MIN_SCREEN_YPOS_RAW 0
+#define MAX_SCREEN_XPOS_RAW MAX(0, lev.width - SCR_FIELDX)
+#define MAX_SCREEN_YPOS_RAW MAX(0, lev.height - SCR_FIELDY)
-unsigned int frame; /* current screen frame */
-unsigned int screen_x; /* current scroll position */
-unsigned int screen_y;
+#define MIN_SCREEN_XPOS (MIN_SCREEN_XPOS_RAW + CAVE_BUFFER_XOFFSET)
+#define MIN_SCREEN_YPOS (MIN_SCREEN_YPOS_RAW + CAVE_BUFFER_YOFFSET)
+#define MAX_SCREEN_XPOS (MAX_SCREEN_XPOS_RAW + CAVE_BUFFER_XOFFSET)
+#define MAX_SCREEN_YPOS (MAX_SCREEN_YPOS_RAW + CAVE_BUFFER_YOFFSET)
+
+#define MIN_SCREEN_X (MIN_SCREEN_XPOS * TILEX)
+#define MIN_SCREEN_Y (MIN_SCREEN_YPOS * TILEY)
+#define MAX_SCREEN_X (MAX_SCREEN_XPOS * TILEX)
+#define MAX_SCREEN_Y (MAX_SCREEN_YPOS * TILEY)
+
+#define VALID_SCREEN_X(x) ((x) < MIN_SCREEN_X ? MIN_SCREEN_X : \
+ (x) > MAX_SCREEN_X ? MAX_SCREEN_X : (x))
+#define VALID_SCREEN_Y(y) ((y) < MIN_SCREEN_Y ? MIN_SCREEN_Y : \
+ (y) > MAX_SCREEN_Y ? MAX_SCREEN_Y : (y))
+
+#define PLAYER_POS_X(nr) (((7 - frame) * ply[nr].prev_x + \
+ (1 + frame) * ply[nr].x) * TILEX / 8)
+#define PLAYER_POS_Y(nr) (((7 - frame) * ply[nr].prev_y + \
+ (1 + frame) * ply[nr].y) * TILEY / 8)
+
+#define PLAYER_SCREEN_X(nr) (PLAYER_POS_X(nr) - \
+ (SCR_FIELDX - 1) * TILEX / 2)
+#define PLAYER_SCREEN_Y(nr) (PLAYER_POS_Y(nr) - \
+ (SCR_FIELDY - 1) * TILEY / 2)
+
+#define USE_EXTENDED_GRAPHICS_ENGINE 1
+
+
+int frame; /* current screen frame */
+int screen_x, screen_y; /* current scroll position */
/* tiles currently on screen */
-static unsigned int screentiles[MAX_BUF_YSIZE][MAX_BUF_XSIZE];
-static unsigned int crumbled_state[MAX_BUF_YSIZE][MAX_BUF_XSIZE];
+static int screen_tiles[MAX_PLAYFIELD_WIDTH + 2][MAX_PLAYFIELD_HEIGHT + 2];
+static int crumbled_state[MAX_PLAYFIELD_WIDTH + 2][MAX_PLAYFIELD_HEIGHT + 2];
+/* graphic info for game objects/frames and players/actions/frames */
+struct GraphicInfo_EM graphic_info_em_object[GAME_TILE_MAX][8];
+struct GraphicInfo_EM graphic_info_em_player[MAX_PLAYERS][PLY_MAX][8];
-/* copy the entire screen to the window at the scroll position
- *
- * perhaps use mit-shm to speed this up
- */
+static void setScreenCenteredToAllPlayers(int *, int *);
+
+int getFieldbufferOffsetX_EM(void)
+{
+ return screen_x % TILEX;
+}
-void blitscreen(void)
+int getFieldbufferOffsetY_EM(void)
{
- unsigned int x = screen_x % (MAX_BUF_XSIZE * TILEX);
- unsigned int y = screen_y % (MAX_BUF_YSIZE * TILEY);
+ return screen_y % TILEY;
+}
- if (x < 2 * TILEX && y < 2 * TILEY)
+void BlitScreenToBitmap_EM(Bitmap *target_bitmap)
+{
+ /* blit all (up to four) parts of the scroll buffer to the target bitmap */
+
+ int x = screen_x % (MAX_BUF_XSIZE * TILEX);
+ int y = screen_y % (MAX_BUF_YSIZE * TILEY);
+ int xsize = SXSIZE;
+ int ysize = SYSIZE;
+ int full_xsize = lev.width * TILEX;
+ int full_ysize = lev.height * TILEY;
+ int sx = SX + (full_xsize < xsize ? (xsize - full_xsize) / 2 : 0);
+ int sy = SY + (full_ysize < ysize ? (ysize - full_ysize) / 2 : 0);
+ int sxsize = (full_xsize < xsize ? full_xsize : xsize);
+ int sysize = (full_ysize < ysize ? full_ysize : ysize);
+ int xxsize = MAX_BUF_XSIZE * TILEX - x;
+ int yysize = MAX_BUF_YSIZE * TILEY - y;
+ int xoffset = 2 * CAVE_BUFFER_XOFFSET * TILEX;
+ int yoffset = 2 * CAVE_BUFFER_YOFFSET * TILEY;
+
+ if (x < xoffset && y < yoffset)
{
- BlitBitmap(screenBitmap, window, x, y,
- SCR_FIELDX * TILEX, SCR_FIELDY * TILEY, SX, SY);
+ BlitBitmap(screenBitmap, target_bitmap, x, y, sxsize, sysize,
+ sx, sy);
}
- else if (x < 2 * TILEX && y >= 2 * TILEY)
+ else if (x < xoffset && y >= yoffset)
{
- BlitBitmap(screenBitmap, window, x, y,
- SCR_FIELDX * TILEX, MAX_BUF_YSIZE * TILEY - y,
- SX, SY);
- BlitBitmap(screenBitmap, window, x, 0,
- SCR_FIELDX * TILEX, y - 2 * TILEY,
- SX, SY + MAX_BUF_YSIZE * TILEY - y);
+ BlitBitmap(screenBitmap, target_bitmap, x, y, sxsize, yysize,
+ sx, sy);
+ BlitBitmap(screenBitmap, target_bitmap, x, 0, sxsize, y - yoffset,
+ sx, sy + yysize);
}
- else if (x >= 2 * TILEX && y < 2 * TILEY)
+ else if (x >= xoffset && y < yoffset)
{
- BlitBitmap(screenBitmap, window, x, y,
- MAX_BUF_XSIZE * TILEX - x, SCR_FIELDY * TILEY,
- SX, SY);
- BlitBitmap(screenBitmap, window, 0, y,
- x - 2 * TILEX, SCR_FIELDY * TILEY,
- SX + MAX_BUF_XSIZE * TILEX - x, SY);
+ BlitBitmap(screenBitmap, target_bitmap, x, y, xxsize, sysize,
+ sx, sy);
+ BlitBitmap(screenBitmap, target_bitmap, 0, y, x - xoffset, sysize,
+ sx + xxsize, sy);
}
else
{
- BlitBitmap(screenBitmap, window, x, y,
- MAX_BUF_XSIZE * TILEX - x, MAX_BUF_YSIZE * TILEY - y,
- SX, SY);
- BlitBitmap(screenBitmap, window, 0, y,
- x - 2 * TILEX, MAX_BUF_YSIZE * TILEY - y,
- SX + MAX_BUF_XSIZE * TILEX - x, SY);
- BlitBitmap(screenBitmap, window, x, 0,
- MAX_BUF_XSIZE * TILEX - x, y - 2 * TILEY,
- SX, SY + MAX_BUF_YSIZE * TILEY - y);
- BlitBitmap(screenBitmap, window, 0, 0,
- x - 2 * TILEX, y - 2 * TILEY,
- SX + MAX_BUF_XSIZE * TILEX - x, SY + MAX_BUF_YSIZE * TILEY - y);
+ BlitBitmap(screenBitmap, target_bitmap, x, y, xxsize, yysize,
+ sx, sy);
+ BlitBitmap(screenBitmap, target_bitmap, 0, y, x - xoffset, yysize,
+ sx + xxsize, sy);
+ BlitBitmap(screenBitmap, target_bitmap, x, 0, xxsize, y - yoffset,
+ sx, sy + yysize);
+ BlitBitmap(screenBitmap, target_bitmap, 0, 0, x - xoffset, y - yoffset,
+ sx + xxsize, sy + yysize);
}
}
+static void BackToFront_EM(void)
+{
+ BlitBitmap(backbuffer, window, SX, SY, SXSIZE, SYSIZE, SX, SY);
+}
+
+static struct GraphicInfo_EM *getObjectGraphic(int x, int y)
+{
+ int tile = lev.draw[x][y];
+ struct GraphicInfo_EM *g = &graphic_info_em_object[tile][frame];
+
+ if (!game.use_native_emc_graphics_engine)
+ getGraphicSourceObjectExt_EM(g, tile, frame, x - lev.left, y - lev.top);
+
+ return g;
+}
+
+static struct GraphicInfo_EM *getPlayerGraphic(int player_nr, int anim)
+{
+ struct GraphicInfo_EM *g = &graphic_info_em_player[player_nr][anim][frame];
+
+ if (!game.use_native_emc_graphics_engine)
+ getGraphicSourcePlayerExt_EM(g, player_nr, anim, frame);
+
+ return g;
+}
+
static void DrawLevelField_EM(int x, int y, int sx, int sy,
boolean draw_masked)
{
- int tile = Draw[y][x];
- struct GraphicInfo_EM *g = &graphic_info_em_object[tile][frame];
- int src_x = g->src_x + g->src_offset_x;
- int src_y = g->src_y + g->src_offset_y;
- int dst_x = sx * TILEX + g->dst_offset_x;
- int dst_y = sy * TILEY + g->dst_offset_y;
+ struct GraphicInfo_EM *g = getObjectGraphic(x, y);
+ int src_x = g->src_x + g->src_offset_x * TILESIZE_VAR / TILESIZE;
+ int src_y = g->src_y + g->src_offset_y * TILESIZE_VAR / TILESIZE;
+ int dst_x = sx * TILEX + g->dst_offset_x * TILESIZE_VAR / TILESIZE;
+ int dst_y = sy * TILEY + g->dst_offset_y * TILESIZE_VAR / TILESIZE;
+ int width = g->width * TILESIZE_VAR / TILESIZE;
+ int height = g->height * TILESIZE_VAR / TILESIZE;
+ int left = screen_x / TILEX;
+ int top = screen_y / TILEY;
+
+ /* do not draw fields that are outside the visible screen area */
+ if (x < left || x >= left + MAX_BUF_XSIZE ||
+ y < top || y >= top + MAX_BUF_YSIZE)
+ return;
if (draw_masked)
{
- if (g->width > 0 && g->height > 0)
- {
- SetClipOrigin(g->bitmap, g->bitmap->stored_clip_gc,
- dst_x - src_x, dst_y - src_y);
+ if (width > 0 && height > 0)
BlitBitmapMasked(g->bitmap, screenBitmap,
- src_x, src_y, g->width, g->height, dst_x, dst_y);
- }
+ src_x, src_y, width, height, dst_x, dst_y);
}
else
{
- if (g->width != TILEX || g->height != TILEY)
+ if ((width != TILEX || height != TILEY) && !g->preserve_background)
ClearRectangle(screenBitmap, sx * TILEX, sy * TILEY, TILEX, TILEY);
- if (g->width > 0 && g->height > 0)
+ if (width > 0 && height > 0)
BlitBitmap(g->bitmap, screenBitmap,
- src_x, src_y, g->width, g->height, dst_x, dst_y);
+ src_x, src_y, width, height, dst_x, dst_y);
}
}
static void DrawLevelFieldCrumbled_EM(int x, int y, int sx, int sy,
int crm, boolean draw_masked)
{
- int tile = Draw[y][x];
- struct GraphicInfo_EM *g = &graphic_info_em_object[tile][frame];
- unsigned int i;
+ struct GraphicInfo_EM *g;
+ int crumbled_border_size;
+ int left = screen_x / TILEX;
+ int top = screen_y / TILEY;
+ int i;
+
+ /* do not draw fields that are outside the visible screen area */
+ if (x < left || x >= left + MAX_BUF_XSIZE ||
+ y < top || y >= top + MAX_BUF_YSIZE)
+ return;
if (crm == 0) /* no crumbled edges for this tile */
return;
+ g = getObjectGraphic(x, y);
+
+ crumbled_border_size =
+ g->crumbled_border_size * TILESIZE_VAR / g->crumbled_tile_size;
+
for (i = 0; i < 4; i++)
{
if (crm & (1 << i))
if (i == 1 || i == 2)
{
- width = g->crumbled_border_size;
+ width = crumbled_border_size;
height = TILEY;
- cx = (i == 2 ? TILEX - g->crumbled_border_size : 0);
+ cx = (i == 2 ? TILEX - crumbled_border_size : 0);
cy = 0;
}
else
{
width = TILEX;
- height = g->crumbled_border_size;
+ height = crumbled_border_size;
cx = 0;
- cy = (i == 3 ? TILEY - g->crumbled_border_size : 0);
+ cy = (i == 3 ? TILEY - crumbled_border_size : 0);
}
if (width > 0 && height > 0)
int dst_y = sy * TILEY + cy;
if (draw_masked)
- {
- SetClipOrigin(g->crumbled_bitmap, g->crumbled_bitmap->stored_clip_gc,
- dst_x - src_x, dst_y - src_y);
BlitBitmapMasked(g->crumbled_bitmap, screenBitmap,
src_x, src_y, width, height, dst_x, dst_y);
- }
else
BlitBitmap(g->crumbled_bitmap, screenBitmap,
src_x, src_y, width, height, dst_x, dst_y);
static void DrawLevelPlayer_EM(int x1, int y1, int player_nr, int anim,
boolean draw_masked)
{
- struct GraphicInfo_EM *g = &graphic_info_em_player[player_nr][anim][frame];
-
+ struct GraphicInfo_EM *g = getPlayerGraphic(player_nr, anim);
int src_x = g->src_x, src_y = g->src_y;
int dst_x, dst_y;
+ /* do not draw fields that are outside the visible screen area */
+ if (x1 < screen_x - TILEX || x1 >= screen_x + MAX_BUF_XSIZE * TILEX ||
+ y1 < screen_y - TILEY || y1 >= screen_y + MAX_BUF_YSIZE * TILEY)
+ return;
+
+ x1 %= MAX_BUF_XSIZE * TILEX;
+ y1 %= MAX_BUF_YSIZE * TILEY;
+
if (draw_masked)
{
/* draw the player to current location */
dst_x = x1;
dst_y = y1;
- SetClipOrigin(g->bitmap, g->bitmap->stored_clip_gc,
- dst_x - src_x, dst_y - src_y);
BlitBitmapMasked(g->bitmap, screenBitmap,
src_x, src_y, TILEX, TILEY, dst_x, dst_y);
/* draw the player to opposite wrap-around column */
dst_x = x1 - MAX_BUF_XSIZE * TILEX;
dst_y = y1;
- SetClipOrigin(g->bitmap, g->bitmap->stored_clip_gc,
- dst_x - src_x, dst_y - src_y);
BlitBitmapMasked(g->bitmap, screenBitmap,
g->src_x, g->src_y, TILEX, TILEY, dst_x, dst_y);
/* draw the player to opposite wrap-around row */
dst_x = x1;
dst_y = y1 - MAX_BUF_YSIZE * TILEY;
- SetClipOrigin(g->bitmap, g->bitmap->stored_clip_gc,
- dst_x - src_x, dst_y - src_y);
BlitBitmapMasked(g->bitmap, screenBitmap,
g->src_x, g->src_y, TILEX, TILEY, dst_x, dst_y);
}
/* draw differences between game tiles and screen tiles
*
* implicitly handles scrolling and restoring background under the sprites
- *
- * perhaps use mit-shm to speed this up
*/
static void animscreen(void)
{
- unsigned int x, y, i;
- unsigned int left = screen_x / TILEX;
- unsigned int top = screen_y / TILEY;
+ int x, y, i;
+ int left = screen_x / TILEX;
+ int top = screen_y / TILEY;
static int xy[4][2] =
{
{ 0, -1 },
{ 0, +1 }
};
+ if (!game.use_native_emc_graphics_engine)
+ for (y = lev.top; y < lev.bottom; y++)
+ for (x = lev.left; x < lev.right; x++)
+ SetGfxAnimation_EM(&graphic_info_em_object[lev.draw[x][y]][frame],
+ lev.draw[x][y], frame,
+ x - lev.left, y - lev.top);
+
for (y = top; y < top + MAX_BUF_YSIZE; y++)
{
for (x = left; x < left + MAX_BUF_XSIZE; x++)
{
int sx = x % MAX_BUF_XSIZE;
int sy = y % MAX_BUF_YSIZE;
- int tile = Draw[y][x];
+ int tile = lev.draw[x][y];
struct GraphicInfo_EM *g = &graphic_info_em_object[tile][frame];
- unsigned int obj = g->unique_identifier;
- unsigned int crm = 0;
+ int obj = g->unique_identifier;
+ int crm = 0;
+ boolean redraw_screen_tile = FALSE;
/* re-calculate crumbled state of this tile */
if (g->has_crumbled_graphics)
int yy = y + xy[i][1];
int tile_next;
- if (xx < 0 || xx >= EM_MAX_CAVE_WIDTH ||
- yy < 0 || yy >= EM_MAX_CAVE_HEIGHT)
+ if (xx < 0 || xx >= CAVE_BUFFER_WIDTH ||
+ yy < 0 || yy >= CAVE_BUFFER_HEIGHT)
continue;
- tile_next = Draw[yy][xx];
+ tile_next = lev.draw[xx][yy];
if (!graphic_info_em_object[tile_next][frame].has_crumbled_graphics)
crm |= (1 << i);
}
}
- if (screentiles[sy][sx] != obj || crumbled_state[sy][sx] != crm)
+ redraw_screen_tile = (screen_tiles[sx][sy] != obj ||
+ crumbled_state[sx][sy] != crm);
+
+ /* only redraw screen tiles if they (or their crumbled state) changed */
+ if (redraw_screen_tile)
{
DrawLevelField_EM(x, y, sx, sy, FALSE);
DrawLevelFieldCrumbled_EM(x, y, sx, sy, crm, FALSE);
- screentiles[sy][sx] = obj;
- crumbled_state[sy][sx] = crm;
+ screen_tiles[sx][sy] = obj;
+ crumbled_state[sx][sy] = crm;
}
}
}
* handles transparency and movement
*/
-static void blitplayer(struct PLAYER *ply)
+static void blitplayer_ext(int nr)
{
- unsigned int x1, y1, x2, y2;
+ int x1, y1, x2, y2;
- if (!ply->alive)
+ if (!ply[nr].alive)
return;
/* x1/y1 are left/top and x2/y2 are right/down part of the player movement */
- x1 = (frame * ply->oldx + (8 - frame) * ply->x) * TILEX / 8;
- y1 = (frame * ply->oldy + (8 - frame) * ply->y) * TILEY / 8;
+ x1 = PLAYER_POS_X(nr);
+ y1 = PLAYER_POS_Y(nr);
x2 = x1 + TILEX - 1;
y2 = y1 + TILEY - 1;
- if ((unsigned int)(x2 - screen_x) < ((MAX_BUF_XSIZE - 1) * TILEX - 1) &&
- (unsigned int)(y2 - screen_y) < ((MAX_BUF_YSIZE - 1) * TILEY - 1))
+ if ((int)(x2 - screen_x) < ((MAX_BUF_XSIZE - 1) * TILEX - 1) &&
+ (int)(y2 - screen_y) < ((MAX_BUF_YSIZE - 1) * TILEY - 1))
{
/* some casts to "int" are needed because of negative calculation values */
- int dx = (int)ply->x - (int)ply->oldx;
- int dy = (int)ply->y - (int)ply->oldy;
- int old_x = (int)ply->oldx + (7 - (int)frame) * dx / 8;
- int old_y = (int)ply->oldy + (7 - (int)frame) * dy / 8;
+ int dx = (int)ply[nr].x - (int)ply[nr].prev_x;
+ int dy = (int)ply[nr].y - (int)ply[nr].prev_y;
+ int old_x = (int)ply[nr].prev_x + (int)frame * dx / 8;
+ int old_y = (int)ply[nr].prev_y + (int)frame * dy / 8;
int new_x = old_x + SIGN(dx);
int new_y = old_y + SIGN(dy);
int old_sx = old_x % MAX_BUF_XSIZE;
- int old_sy = old_y % MAX_BUF_XSIZE;
+ int old_sy = old_y % MAX_BUF_YSIZE;
int new_sx = new_x % MAX_BUF_XSIZE;
- int new_sy = new_y % MAX_BUF_XSIZE;
- int old_crm = crumbled_state[old_sy][old_sx];
- int new_crm = crumbled_state[new_sy][new_sx];
+ int new_sy = new_y % MAX_BUF_YSIZE;
+ int new_crm = crumbled_state[new_sx][new_sy];
/* only diggable elements can be crumbled in the classic EM engine */
- boolean player_is_digging = (crumbled_state[new_sy][new_sx] != 0);
-
- x1 %= MAX_BUF_XSIZE * TILEX;
- y1 %= MAX_BUF_YSIZE * TILEY;
- x2 %= MAX_BUF_XSIZE * TILEX;
- y2 %= MAX_BUF_YSIZE * TILEY;
+ boolean player_is_digging = (new_crm != 0);
if (player_is_digging)
{
- /* draw the field the player is moving from (under the player) */
- DrawLevelField_EM(old_x, old_y, old_sx, old_sy, FALSE);
- DrawLevelFieldCrumbled_EM(old_x, old_y, old_sx, old_sy, old_crm, FALSE);
-
/* draw the field the player is moving to (under the player) */
DrawLevelField_EM(new_x, new_y, new_sx, new_sy, FALSE);
DrawLevelFieldCrumbled_EM(new_x, new_y, new_sx, new_sy, new_crm, FALSE);
/* draw the player (masked) over the element he is just digging away */
- DrawLevelPlayer_EM(x1, y1, ply->num, ply->anim, TRUE);
+ DrawLevelPlayer_EM(x1, y1, ply[nr].num, ply[nr].anim, TRUE);
+
+ /* draw the field the player is moving from (masked over the player) */
+ DrawLevelField_EM(old_x, old_y, old_sx, old_sy, TRUE);
}
else
{
/* draw the player under the element which is on the same field */
- DrawLevelPlayer_EM(x1, y1, ply->num, ply->anim, FALSE);
+ DrawLevelPlayer_EM(x1, y1, ply[nr].num, ply[nr].anim, FALSE);
/* draw the field the player is moving from (masked over the player) */
DrawLevelField_EM(old_x, old_y, old_sx, old_sy, TRUE);
DrawLevelField_EM(new_x, new_y, new_sx, new_sy, TRUE);
}
- /* mark screen tiles as dirty */
- screentiles[old_sy][old_sx] = -1;
- screentiles[new_sy][new_sx] = -1;
+ /* redraw screen tiles in the next frame (player may have left the tiles) */
+ screen_tiles[old_sx][old_sy] = -1;
+ screen_tiles[new_sx][new_sy] = -1;
+ }
+}
+
+static void blitplayer(int nr)
+{
+ blitplayer_ext(nr);
+
+ /* check for wrap-around movement ... */
+ if (ply[nr].x < lev.left ||
+ ply[nr].x > lev.right - 1)
+ {
+ struct PLAYER ply_last = ply[nr];
+ int direction = (ply[nr].x < lev.left ? -1 : 1);
+ int dx = ply[nr].x - ply[nr].prev_x;
+
+ ply[nr].x += -direction * lev.width;
+ ply[nr].prev_x = ply[nr].x - dx;
+
+ if (!lev.infinite_true)
+ {
+ int dy = ply[nr].y - ply[nr].prev_y;
+
+ ply[nr].y += direction;
+ ply[nr].prev_y = ply[nr].y - dy;
+ }
+
+ /* draw player entering playfield from the opposite side */
+ blitplayer_ext(nr);
+
+ /* ... but keep the old player position until game logic */
+ ply[nr] = ply_last;
}
}
void game_initscreen(void)
{
- unsigned int x,y;
+ int x, y, sx, sy;
- frame = 6;
- screen_x = 0;
- screen_y = 0;
+ frame = 1;
+
+ if (game.centered_player_nr == -1)
+ {
+ setScreenCenteredToAllPlayers(&sx, &sy);
+ }
+ else
+ {
+ sx = PLAYER_SCREEN_X(game.centered_player_nr);
+ sy = PLAYER_SCREEN_Y(game.centered_player_nr);
+ }
+
+ screen_x = VALID_SCREEN_X(sx);
+ screen_y = VALID_SCREEN_Y(sy);
for (y = 0; y < MAX_BUF_YSIZE; y++)
{
for (x = 0; x < MAX_BUF_XSIZE; x++)
{
- screentiles[y][x] = -1;
- crumbled_state[y][x] = 0;
+ screen_tiles[x][y] = -1;
+ crumbled_state[x][y] = 0;
+ }
+ }
+}
+
+static int getMaxCenterDistancePlayerNr(int center_x, int center_y)
+{
+ int max_dx = 0, max_dy = 0;
+ int player_nr = game_em.last_moving_player;
+ int i;
+
+ for (i = 0; i < MAX_PLAYERS; i++)
+ {
+ if (ply[i].alive)
+ {
+ int sx = PLAYER_SCREEN_X(i);
+ int sy = PLAYER_SCREEN_Y(i);
+
+ if (game_em.last_player_direction[i] != MV_NONE &&
+ (ABS(sx - center_x) > max_dx ||
+ ABS(sy - center_y) > max_dy))
+ {
+ max_dx = MAX(max_dx, ABS(sx - center_x));
+ max_dy = MAX(max_dy, ABS(sy - center_y));
+
+ player_nr = i;
+ }
}
}
- DrawGameDoorValues_EM(lev.required, ply1.dynamite, lev.score,
- DISPLAY_TIME(lev.time + 4));
+ return player_nr;
+}
+
+static void setMinimalPlayerBoundaries(int *sx1, int *sy1, int *sx2, int *sy2)
+{
+ boolean num_checked_players = 0;
+ int i;
+
+ for (i = 0; i < MAX_PLAYERS; i++)
+ {
+ if (ply[i].alive)
+ {
+ int sx = PLAYER_SCREEN_X(i);
+ int sy = PLAYER_SCREEN_Y(i);
+
+ if (num_checked_players == 0)
+ {
+ *sx1 = *sx2 = sx;
+ *sy1 = *sy2 = sy;
+ }
+ else
+ {
+ *sx1 = MIN(*sx1, sx);
+ *sy1 = MIN(*sy1, sy);
+ *sx2 = MAX(*sx2, sx);
+ *sy2 = MAX(*sy2, sy);
+ }
+
+ num_checked_players++;
+ }
+ }
}
-void game_animscreen(void)
+boolean checkIfAllPlayersFitToScreen(void)
{
- unsigned int x,y;
+ int sx1 = 0, sy1 = 0, sx2 = 0, sy2 = 0;
+
+ setMinimalPlayerBoundaries(&sx1, &sy1, &sx2, &sy2);
+
+ return (sx2 - sx1 <= SCR_FIELDX * TILEX &&
+ sy2 - sy1 <= SCR_FIELDY * TILEY);
+}
- x = (frame * ply1.oldx + (8 - frame) * ply1.x) * TILEX / 8
- + ((SCR_FIELDX - 1) * TILEX) / 2;
- y = (frame * ply1.oldy + (8 - frame) * ply1.y) * TILEY / 8
- + ((SCR_FIELDY - 1) * TILEY) / 2;
+static void setScreenCenteredToAllPlayers(int *sx, int *sy)
+{
+ int sx1 = screen_x, sy1 = screen_y, sx2 = screen_x, sy2 = screen_y;
- if (x > lev.width * TILEX)
- x = lev.width * TILEX;
- if (y > lev.height * TILEY)
- y = lev.height * TILEY;
+ setMinimalPlayerBoundaries(&sx1, &sy1, &sx2, &sy2);
- if (x < SCR_FIELDX * TILEX)
- x = SCR_FIELDX * TILEY;
- if (y < SCR_FIELDY * TILEY)
- y = SCR_FIELDY * TILEY;
+ *sx = (sx1 + sx2) / 2;
+ *sy = (sy1 + sy2) / 2;
+}
- screen_x = x - (SCR_FIELDX - 1) * TILEX;
- screen_y = y - (SCR_FIELDY - 1) * TILEY;
+static void setMaxCenterDistanceForAllPlayers(int *max_dx, int *max_dy,
+ int center_x, int center_y)
+{
+ int sx1 = center_x, sy1 = center_y, sx2 = center_x, sy2 = center_y;
+
+ setMinimalPlayerBoundaries(&sx1, &sy1, &sx2, &sy2);
+
+ *max_dx = MAX(ABS(sx1 - center_x), ABS(sx2 - center_x));
+ *max_dy = MAX(ABS(sy1 - center_y), ABS(sy2 - center_y));
+}
+
+static boolean checkIfAllPlayersAreVisible(int center_x, int center_y)
+{
+ int max_dx, max_dy;
+
+ setMaxCenterDistanceForAllPlayers(&max_dx, &max_dy, center_x, center_y);
+
+ return (max_dx <= SCR_FIELDX * TILEX / 2 &&
+ max_dy <= SCR_FIELDY * TILEY / 2);
+}
+
+void RedrawPlayfield_EM(boolean force_redraw)
+{
+ boolean draw_new_player_location = FALSE;
+ boolean draw_new_player_location_wrap = FALSE;
+ boolean quick_relocation = setup.quick_switch;
+ int max_center_distance_player_nr =
+ getMaxCenterDistancePlayerNr(screen_x, screen_y);
+ int stepsize = TILEX / 8;
+ int offset_raw = game.scroll_delay_value;
+ int offset_x = MIN(offset_raw, (SCR_FIELDX - 2) / 2) * TILEX;
+ int offset_y = MIN(offset_raw, (SCR_FIELDY - 2) / 2) * TILEY;
+ int screen_x_old = screen_x;
+ int screen_y_old = screen_y;
+ int x, y, sx, sy;
+ int i;
+
+ if (game.set_centered_player)
+ {
+ boolean all_players_fit_to_screen = checkIfAllPlayersFitToScreen();
+
+ /* switching to "all players" only possible if all players fit to screen */
+ if (game.centered_player_nr_next == -1 && !all_players_fit_to_screen)
+ {
+ game.centered_player_nr_next = game.centered_player_nr;
+ game.set_centered_player = FALSE;
+ }
+
+ /* do not switch focus to non-existing (or non-active) player */
+ if (game.centered_player_nr_next >= 0 &&
+ !ply[game.centered_player_nr_next].alive)
+ {
+ game.centered_player_nr_next = game.centered_player_nr;
+ game.set_centered_player = FALSE;
+ }
+ }
+
+ /* also allow focus switching when screen is scrolled to half tile */
+ if (game.set_centered_player)
+ {
+ game.centered_player_nr = game.centered_player_nr_next;
+
+ draw_new_player_location = TRUE;
+ draw_new_player_location_wrap = game.set_centered_player_wrap;
+ force_redraw = TRUE;
+
+ game.set_centered_player = FALSE;
+ game.set_centered_player_wrap = FALSE;
+ }
+
+ if (game.centered_player_nr == -1)
+ {
+ if (draw_new_player_location || offset_raw == 0)
+ {
+ setScreenCenteredToAllPlayers(&sx, &sy);
+ }
+ else
+ {
+ sx = PLAYER_SCREEN_X(max_center_distance_player_nr);
+ sy = PLAYER_SCREEN_Y(max_center_distance_player_nr);
+ }
+ }
+ else
+ {
+ sx = PLAYER_SCREEN_X(game.centered_player_nr);
+ sy = PLAYER_SCREEN_Y(game.centered_player_nr);
+ }
+
+ if (draw_new_player_location && quick_relocation)
+ {
+ screen_x = VALID_SCREEN_X(sx);
+ screen_y = VALID_SCREEN_Y(sy);
+ screen_x_old = screen_x;
+ screen_y_old = screen_y;
+ }
+
+ if (draw_new_player_location && !quick_relocation)
+ {
+ unsigned int frame_delay_value_old = GetVideoFrameDelay();
+ int wait_delay_value = frame_delay_value_old;
+ int screen_xx = VALID_SCREEN_X(sx);
+ int screen_yy = VALID_SCREEN_Y(sy);
+
+ if (draw_new_player_location_wrap)
+ {
+ if (lev.infinite_true)
+ {
+ // when wrapping around (horizontally), keep vertical player position
+ screen_yy = screen_y;
+ }
+
+ // scrolling for wrapping should be faster than for switching players
+ wait_delay_value /= 4;
+ }
+
+ SetVideoFrameDelay(wait_delay_value);
+
+ while (screen_x != screen_xx || screen_y != screen_yy)
+ {
+ int dx = (screen_xx < screen_x ? +1 : screen_xx > screen_x ? -1 : 0);
+ int dy = (screen_yy < screen_y ? +1 : screen_yy > screen_y ? -1 : 0);
+ int dxx = 0, dyy = 0;
+
+ if (dx == 0 && dy == 0) /* no scrolling needed at all */
+ break;
+
+ if (ABS(screen_xx - screen_x) >= TILEX)
+ {
+ screen_x -= dx * TILEX;
+ dxx = dx * TILEX / 2;
+ }
+ else
+ {
+ screen_x = screen_xx;
+ dxx = 0;
+ }
+
+ if (ABS(screen_yy - screen_y) >= TILEY)
+ {
+ screen_y -= dy * TILEY;
+ dyy = dy * TILEY / 2;
+ }
+ else
+ {
+ screen_y = screen_yy;
+ dyy = 0;
+ }
+
+ /* scroll in two steps of half tile size to make things smoother */
+ screen_x += dxx;
+ screen_y += dyy;
+
+ animscreen();
+
+ for (i = 0; i < MAX_PLAYERS; i++)
+ blitplayer(i);
+
+ BlitScreenToBitmap_EM(backbuffer);
+ BackToFront_EM();
+
+ /* scroll second step to align at full tile size */
+ screen_x -= dxx;
+ screen_y -= dyy;
+
+ animscreen();
+
+ for (i = 0; i < MAX_PLAYERS; i++)
+ blitplayer(i);
+
+ BlitScreenToBitmap_EM(backbuffer);
+ BackToFront_EM();
+ }
+
+ SetVideoFrameDelay(frame_delay_value_old);
+
+ screen_x_old = screen_x;
+ screen_y_old = screen_y;
+ }
+
+ if (force_redraw)
+ {
+ for (y = 0; y < MAX_BUF_YSIZE; y++)
+ {
+ for (x = 0; x < MAX_BUF_XSIZE; x++)
+ {
+ screen_tiles[x][y] = -1;
+ crumbled_state[x][y] = 0;
+ }
+ }
+ }
+
+ /* calculate new screen scrolling position, with regard to scroll delay */
+ screen_x = VALID_SCREEN_X(sx + offset_x < screen_x ? sx + offset_x :
+ sx - offset_x > screen_x ? sx - offset_x :
+ screen_x);
+ screen_y = VALID_SCREEN_Y(sy + offset_y < screen_y ? sy + offset_y :
+ sy - offset_y > screen_y ? sy - offset_y :
+ screen_y);
+
+ /* prevent scrolling further than double player step size when scrolling */
+ if (ABS(screen_x - screen_x_old) > 2 * stepsize)
+ {
+ int dx = SIGN(screen_x - screen_x_old);
+
+ screen_x = screen_x_old + dx * 2 * stepsize;
+ }
+ if (ABS(screen_y - screen_y_old) > 2 * stepsize)
+ {
+ int dy = SIGN(screen_y - screen_y_old);
+
+ screen_y = screen_y_old + dy * 2 * stepsize;
+ }
+
+ /* prevent scrolling away from the other players when focus on all players */
+ if (game.centered_player_nr == -1)
+ {
+ /* check if all players are still visible with new scrolling position */
+ if (checkIfAllPlayersAreVisible(screen_x_old, screen_y_old) &&
+ !checkIfAllPlayersAreVisible(screen_x, screen_y))
+ {
+ /* reset horizontal scroll position to last value, if needed */
+ if (!checkIfAllPlayersAreVisible(screen_x, screen_y_old))
+ screen_x = screen_x_old;
+
+ /* reset vertical scroll position to last value, if needed */
+ if (!checkIfAllPlayersAreVisible(screen_x_old, screen_y))
+ screen_y = screen_y_old;
+ }
+ }
+
+ /* prevent scrolling (for screen correcting) if no player is moving */
+ if (!game_em.any_player_moving)
+ {
+ screen_x = screen_x_old;
+ screen_y = screen_y_old;
+ }
+ else
+ {
+ /* prevent scrolling against the players move direction */
+ int player_nr = (game.centered_player_nr == -1 ?
+ max_center_distance_player_nr : game.centered_player_nr);
+ int player_move_dir = game_em.last_player_direction[player_nr];
+ int dx = SIGN(screen_x - screen_x_old);
+ int dy = SIGN(screen_y - screen_y_old);
+
+ if ((dx < 0 && player_move_dir != MV_LEFT) ||
+ (dx > 0 && player_move_dir != MV_RIGHT))
+ screen_x = screen_x_old;
+
+ if ((dy < 0 && player_move_dir != MV_UP) ||
+ (dy > 0 && player_move_dir != MV_DOWN))
+ screen_y = screen_y_old;
+ }
+
+ // skip redrawing playfield in warp mode or when testing tapes with "autotest"
+ if (DrawingDeactivatedField())
+ return;
animscreen();
- blitplayer(&ply1);
- blitplayer(&ply2);
- blitscreen();
- FlushDisplay();
+ for (i = 0; i < MAX_PLAYERS; i++)
+ blitplayer(i);
}