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 pad_dest_x = dest_x - pad_x;
129 int pad_dest_y = dest_y - pad_y;
130 int pad_width = width + 2 * pad_x;
131 int pad_height = height + 2 * pad_y;
136 int buffer_x = DOOR_GFX_PAGEX3;
137 int buffer_y = DOOR_GFX_PAGEY1;
141 printf("::: (%d, %d), (%d, %d), (%d, %d), (%d, %d) -> (%d, %d), (%d, %d), (%d, %d)\n",
147 pad_dest_x, pad_dest_y,
148 pad_width, pad_height,
152 if (width == 0 || height == 0)
155 /* correct values to avoid off-screen blitting (start position) */
156 if (pad_dest_x < screen_info.startx)
158 pad_width -= (screen_info.startx - pad_dest_x);
159 pad_dest_x = screen_info.startx;
161 if (pad_dest_y < screen_info.starty)
163 pad_height -= (screen_info.starty - pad_dest_y);
164 pad_dest_y = screen_info.starty;
167 /* correct values to avoid off-screen blitting (blit size) */
168 if (pad_width > screen_info.width)
169 pad_width = screen_info.width;
170 if (pad_height > screen_info.height)
171 pad_height = screen_info.height;
173 /* special method to avoid flickering interference with BackToFront() */
174 BlitBitmap(backbuffer, screen_info.save_buffer, pad_dest_x, pad_dest_y,
175 pad_width, pad_height, buffer_x, buffer_y);
176 SetClipOrigin(toon_bitmap, toon_clip_gc, dest_x - src_x, dest_y - src_y);
177 BlitBitmapMasked(toon_bitmap, backbuffer, src_x, src_y, width, height,
179 BlitBitmap(backbuffer, window, pad_dest_x, pad_dest_y, pad_width, pad_height,
180 pad_dest_x, pad_dest_y);
182 screen_info.update_function();
184 BlitBitmap(screen_info.save_buffer, backbuffer, buffer_x, buffer_y,
185 pad_width, pad_height, pad_dest_x, pad_dest_y);
190 boolean AnimateToon(int toon_nr, boolean restart)
192 static unsigned long animation_frame_counter = 0;
193 static int pos_x = 0, pos_y = 0;
194 static int delta_x = 0, delta_y = 0;
195 static int frame = 0;
196 static boolean horiz_move, vert_move;
197 static unsigned long anim_delay = 0;
198 static unsigned long anim_delay_value = 0;
199 static int width,height;
200 static int pad_x,pad_y;
201 static int cut_x,cut_y;
202 static int src_x, src_y;
203 static int dest_x, dest_y;
204 struct ToonInfo *anim = &screen_info.toons[toon_nr];
205 Bitmap *anim_bitmap = screen_info.toons[toon_nr].bitmap;
206 GC anim_clip_gc = anim_bitmap->stored_clip_gc;
207 int direction = get_toon_direction(anim->direction);
211 horiz_move = (direction & (MV_LEFT | MV_RIGHT));
212 vert_move = (direction & (MV_UP | MV_DOWN));
213 anim_delay_value = anim->step_delay * screen_info.frame_delay_value;
215 frame = getAnimationFrame(anim->anim_frames, anim->anim_delay,
216 anim->anim_mode, anim->anim_start_frame,
217 animation_frame_counter++);
221 int pos_bottom = screen_info.height - anim->height;
223 if (strEqual(anim->position, "top"))
225 else if (strEqual(anim->position, "bottom"))
227 else if (strEqual(anim->position, "upper"))
228 pos_y = GetSimpleRandom(pos_bottom / 2);
229 else if (strEqual(anim->position, "lower"))
230 pos_y = pos_bottom / 2 + GetSimpleRandom(pos_bottom / 2);
232 pos_y = GetSimpleRandom(pos_bottom);
234 if (direction == MV_RIGHT)
236 delta_x = anim->step_offset;
237 pos_x = -anim->width + delta_x;
241 delta_x = -anim->step_offset;
242 pos_x = screen_info.width + delta_x;
249 int pos_right = screen_info.width - anim->width;
251 if (strEqual(anim->position, "left"))
253 else if (strEqual(anim->position, "right"))
256 pos_x = GetSimpleRandom(pos_right);
258 if (direction == MV_DOWN)
260 delta_y = anim->step_offset;
261 pos_y = -anim->height + delta_y;
265 delta_y = -anim->step_offset;
266 pos_y = screen_info.height + delta_y;
273 if (pos_x <= -anim->width - anim->step_offset ||
274 pos_x >= screen_info.width + anim->step_offset ||
275 pos_y <= -anim->height - anim->step_offset ||
276 pos_y >= screen_info.height + anim->step_offset)
279 if (!DelayReached(&anim_delay, anim_delay_value))
281 if (screen_info.redraw_needed_function() && !restart)
282 DrawAnim(anim_bitmap, anim_clip_gc,
283 src_x + cut_x, src_y + cut_y,
285 screen_info.startx + dest_x,
286 screen_info.starty + dest_y,
292 if (pos_x < -anim->width)
293 pos_x = -anim->width;
294 else if (pos_x > screen_info.width)
295 pos_x = screen_info.width;
296 if (pos_y < -anim->height)
297 pos_y = -anim->height;
298 else if (pos_y > screen_info.height)
299 pos_y = screen_info.height;
301 pad_x = (horiz_move ? anim->step_offset : 0);
302 pad_y = (vert_move ? anim->step_offset : 0);
303 src_x = anim->src_x + frame * anim->width;
309 height = anim->height;
317 else if (pos_x > screen_info.width - anim->width)
318 width -= (pos_x - (screen_info.width - anim->width));
326 else if (pos_y > screen_info.height - anim->height)
327 height -= (pos_y - (screen_info.height - anim->height));
329 DrawAnim(anim_bitmap, anim_clip_gc,
330 src_x + cut_x, src_y + cut_y,
332 screen_info.startx + dest_x,
333 screen_info.starty + dest_y,
339 frame = getAnimationFrame(anim->anim_frames, anim->anim_delay,
340 anim->anim_mode, anim->anim_start_frame,
341 animation_frame_counter++);
346 void HandleAnimation(int mode)
348 static unsigned long animstart_delay = -1;
349 static unsigned long animstart_delay_value = 0;
350 static boolean anim_running = FALSE;
351 static boolean anim_restart = TRUE;
352 static boolean reset_delay = TRUE;
353 static int toon_nr = 0;
355 if (!setup.toons || screen_info.num_toons == 0)
358 /* this may happen after reloading graphics and redefining "num_toons" */
359 if (toon_nr >= screen_info.num_toons)
365 screen_info.prepare_backbuffer_function();
383 redraw_mask |= (REDRAW_FIELD | REDRAW_FROM_BACKBUFFER);
385 screen_info.update_function();
388 anim_running = FALSE;
399 animstart_delay = Counter();
400 animstart_delay_value = GetSimpleRandom(3000);
406 if (!DelayReached(&animstart_delay, animstart_delay_value))
409 toon_nr = GetSimpleRandom(screen_info.num_toons);
412 anim_restart = reset_delay = AnimateToon(toon_nr, anim_restart);
417 HandleAnimation(ANIM_START);
422 HandleAnimation(ANIM_STOP);
427 HandleAnimation(ANIM_CONTINUE);