1 /***********************************************************
2 * Artsoft Retro-Game Library *
3 *----------------------------------------------------------*
4 * (c) 1995-2006 Artsoft Entertainment *
6 * Detmolder Strasse 189 *
9 * e-mail: info@artsoft.org *
10 *----------------------------------------------------------*
12 ***********************************************************/
18 /* values for toon animation */
20 #define ANIM_CONTINUE 1
24 static struct ToonScreenInfo screen_info;
27 /* ========================================================================= */
28 /* generic animation frame calculation */
29 /* ========================================================================= */
31 int getAnimationFrame(int num_frames, int delay, int mode, int start_frame,
36 sync_frame += start_frame * delay;
38 if (mode & ANIM_LOOP) /* looping animation */
40 frame = (sync_frame % (delay * num_frames)) / delay;
42 else if (mode & ANIM_LINEAR) /* linear (non-looping) animation */
44 frame = sync_frame / delay;
46 if (frame > num_frames - 1)
47 frame = num_frames - 1;
49 else if (mode & ANIM_PINGPONG) /* oscillate (border frames once) */
51 int max_anim_frames = (num_frames > 1 ? 2 * num_frames - 2 : 1);
53 frame = (sync_frame % (delay * max_anim_frames)) / delay;
54 frame = (frame < num_frames ? frame : max_anim_frames - frame);
56 else if (mode & ANIM_PINGPONG2) /* oscillate (border frames twice) */
58 int max_anim_frames = 2 * num_frames;
60 frame = (sync_frame % (delay * max_anim_frames)) / delay;
61 frame = (frame < num_frames ? frame : max_anim_frames - frame - 1);
63 else if (mode & ANIM_RANDOM) /* play frames in random order */
65 /* note: expect different frames for the same delay cycle! */
67 if (gfx.anim_random_frame < 0)
68 frame = GetSimpleRandom(num_frames);
70 frame = gfx.anim_random_frame % num_frames;
72 else if (mode & (ANIM_CE_VALUE | ANIM_CE_SCORE | ANIM_CE_DELAY))
74 frame = sync_frame % num_frames;
77 if (mode & ANIM_REVERSE) /* use reverse animation direction */
78 frame = num_frames - frame - 1;
84 /* ========================================================================= */
85 /* toon animation functions */
86 /* ========================================================================= */
88 static int get_toon_direction(char *direction_string_raw)
90 char *direction_string = getStringToLower(direction_string_raw);
91 int direction = (strEqual(direction_string, "left") ? MV_LEFT :
92 strEqual(direction_string, "right") ? MV_RIGHT :
93 strEqual(direction_string, "up") ? MV_UP :
94 strEqual(direction_string, "down") ? MV_DOWN :
97 free(direction_string);
102 void InitToonScreen(Bitmap *save_buffer,
103 void (*update_function)(void),
104 void (*prepare_backbuffer_function)(void),
105 boolean (*redraw_needed_function)(void),
106 struct ToonInfo *toons, int num_toons,
107 int startx, int starty,
108 int width, int height,
109 int frame_delay_value)
111 screen_info.save_buffer = save_buffer;
112 screen_info.update_function = update_function;
113 screen_info.prepare_backbuffer_function = prepare_backbuffer_function;
114 screen_info.redraw_needed_function = redraw_needed_function;
115 screen_info.toons = toons;
116 screen_info.num_toons = num_toons;
117 screen_info.startx = startx;
118 screen_info.starty = starty;
119 screen_info.width = width;
120 screen_info.height = height;
121 screen_info.frame_delay_value = frame_delay_value;
124 void DrawAnim(Bitmap *toon_bitmap, GC toon_clip_gc,
125 int src_x, int src_y, int width, int height,
126 int dest_x, int dest_y, int pad_x, int pad_y)
128 int buf_x = DOOR_GFX_PAGEX3, buf_y = DOOR_GFX_PAGEY1;
130 /* special method to avoid flickering interference with BackToFront() */
131 BlitBitmap(backbuffer, screen_info.save_buffer, dest_x-pad_x, dest_y-pad_y,
132 width+2*pad_x, height+2*pad_y, buf_x, buf_y);
133 SetClipOrigin(toon_bitmap, toon_clip_gc, dest_x-src_x, dest_y-src_y);
134 BlitBitmapMasked(toon_bitmap, backbuffer,
135 src_x, src_y, width, height, dest_x, dest_y);
136 BlitBitmap(backbuffer, window, dest_x-pad_x, dest_y-pad_y,
137 width+2*pad_x, height+2*pad_y, dest_x-pad_x, dest_y-pad_y);
139 screen_info.update_function();
141 BlitBitmap(screen_info.save_buffer, backbuffer, buf_x, buf_y,
142 width+2*pad_x, height+2*pad_y, dest_x-pad_x, dest_y-pad_y);
147 boolean AnimateToon(int toon_nr, boolean restart)
149 static unsigned long animation_frame_counter = 0;
150 static int pos_x = 0, pos_y = 0;
151 static int delta_x = 0, delta_y = 0;
152 static int frame = 0;
153 static boolean horiz_move, vert_move;
154 static unsigned long anim_delay = 0;
155 static unsigned long anim_delay_value = 0;
156 static int width,height;
157 static int pad_x,pad_y;
158 static int cut_x,cut_y;
159 static int src_x, src_y;
160 static int dest_x, dest_y;
161 struct ToonInfo *anim = &screen_info.toons[toon_nr];
162 Bitmap *anim_bitmap = screen_info.toons[toon_nr].bitmap;
163 GC anim_clip_gc = anim_bitmap->stored_clip_gc;
164 int direction = get_toon_direction(anim->direction);
168 horiz_move = (direction & (MV_LEFT | MV_RIGHT));
169 vert_move = (direction & (MV_UP | MV_DOWN));
170 anim_delay_value = anim->step_delay * screen_info.frame_delay_value;
172 frame = getAnimationFrame(anim->anim_frames, anim->anim_delay,
173 anim->anim_mode, anim->anim_start_frame,
174 animation_frame_counter++);
178 int pos_bottom = screen_info.height - anim->height;
180 if (strEqual(anim->position, "top"))
182 else if (strEqual(anim->position, "bottom"))
184 else if (strEqual(anim->position, "upper"))
185 pos_y = GetSimpleRandom(pos_bottom / 2);
186 else if (strEqual(anim->position, "lower"))
187 pos_y = pos_bottom / 2 + GetSimpleRandom(pos_bottom / 2);
189 pos_y = GetSimpleRandom(pos_bottom);
191 if (direction == MV_RIGHT)
193 delta_x = anim->step_offset;
194 pos_x = -anim->width + delta_x;
198 delta_x = -anim->step_offset;
199 pos_x = screen_info.width + delta_x;
206 int pos_right = screen_info.width - anim->width;
208 if (strEqual(anim->position, "left"))
210 else if (strEqual(anim->position, "right"))
213 pos_x = GetSimpleRandom(pos_right);
215 if (direction == MV_DOWN)
217 delta_y = anim->step_offset;
218 pos_y = -anim->height + delta_y;
222 delta_y = -anim->step_offset;
223 pos_y = screen_info.width + delta_y;
230 if (pos_x <= -anim->width - anim->step_offset ||
231 pos_x >= screen_info.width + anim->step_offset ||
232 pos_y <= -anim->height - anim->step_offset ||
233 pos_y >= screen_info.height + anim->step_offset)
236 if (!DelayReached(&anim_delay, anim_delay_value))
238 if (screen_info.redraw_needed_function() && !restart)
239 DrawAnim(anim_bitmap, anim_clip_gc,
240 src_x + cut_x, src_y + cut_y,
242 screen_info.startx + dest_x,
243 screen_info.starty + dest_y,
249 if (pos_x < -anim->width)
250 pos_x = -anim->width;
251 else if (pos_x > screen_info.width)
252 pos_x = screen_info.width;
253 if (pos_y < -anim->height)
254 pos_y = -anim->height;
255 else if (pos_y > screen_info.height)
256 pos_y = screen_info.height;
258 pad_x = (horiz_move ? anim->step_offset : 0);
259 pad_y = (vert_move ? anim->step_offset : 0);
260 src_x = anim->src_x + frame * anim->width;
266 height = anim->height;
274 else if (pos_x > screen_info.width - anim->width)
275 width -= (pos_x - (screen_info.width - anim->width));
283 else if (pos_y > screen_info.height - anim->height)
284 height -= (pos_y - (screen_info.height - anim->height));
286 DrawAnim(anim_bitmap, anim_clip_gc,
287 src_x + cut_x, src_y + cut_y,
289 screen_info.startx + dest_x,
290 screen_info.starty + dest_y,
296 frame = getAnimationFrame(anim->anim_frames, anim->anim_delay,
297 anim->anim_mode, anim->anim_start_frame,
298 animation_frame_counter++);
303 void HandleAnimation(int mode)
305 static unsigned long animstart_delay = -1;
306 static unsigned long animstart_delay_value = 0;
307 static boolean anim_running = FALSE;
308 static boolean anim_restart = TRUE;
309 static boolean reset_delay = TRUE;
310 static int toon_nr = 0;
312 if (!setup.toons || screen_info.num_toons == 0)
315 /* this may happen after reloading graphics and redefining "num_toons" */
316 if (toon_nr >= screen_info.num_toons)
322 screen_info.prepare_backbuffer_function();
342 redraw_mask |= (REDRAW_FIELD | REDRAW_FROM_BACKBUFFER);
344 /* Redraw background even when in direct drawing mode */
345 draw_mode = setup.direct_draw;
346 setup.direct_draw = FALSE;
347 screen_info.update_function();
348 setup.direct_draw = draw_mode;
351 anim_running = FALSE;
362 animstart_delay = Counter();
363 animstart_delay_value = GetSimpleRandom(3000);
369 if (!DelayReached(&animstart_delay, animstart_delay_value))
372 toon_nr = GetSimpleRandom(screen_info.num_toons);
375 anim_restart = reset_delay = AnimateToon(toon_nr, anim_restart);
380 HandleAnimation(ANIM_START);
385 HandleAnimation(ANIM_STOP);
390 HandleAnimation(ANIM_CONTINUE);