1 // ============================================================================
2 // Artsoft Retro-Game Library
3 // ----------------------------------------------------------------------------
4 // (c) 1995-2014 by Artsoft Entertainment
7 // http://www.artsoft.org/
8 // ----------------------------------------------------------------------------
10 // ============================================================================
16 /* values for toon animation */
18 #define ANIM_CONTINUE 1
22 static struct ToonScreenInfo screen_info;
25 /* ========================================================================= */
26 /* generic animation frame calculation */
27 /* ========================================================================= */
29 int getAnimationFrame(int num_frames, int delay, int mode, int start_frame,
34 sync_frame += start_frame * delay;
36 if (mode & ANIM_LOOP) /* looping animation */
38 frame = (sync_frame % (delay * num_frames)) / delay;
40 else if (mode & ANIM_LINEAR) /* linear (non-looping) animation */
42 frame = sync_frame / delay;
44 if (frame > num_frames - 1)
45 frame = num_frames - 1;
47 else if (mode & ANIM_PINGPONG) /* oscillate (border frames once) */
49 int max_anim_frames = (num_frames > 1 ? 2 * num_frames - 2 : 1);
51 frame = (sync_frame % (delay * max_anim_frames)) / delay;
52 frame = (frame < num_frames ? frame : max_anim_frames - frame);
54 else if (mode & ANIM_PINGPONG2) /* oscillate (border frames twice) */
56 int max_anim_frames = 2 * num_frames;
58 frame = (sync_frame % (delay * max_anim_frames)) / delay;
59 frame = (frame < num_frames ? frame : max_anim_frames - frame - 1);
61 else if (mode & ANIM_RANDOM) /* play frames in random order */
63 /* note: expect different frames for the same delay cycle! */
65 if (gfx.anim_random_frame < 0)
66 frame = GetSimpleRandom(num_frames);
68 frame = gfx.anim_random_frame % num_frames;
70 else if (mode & (ANIM_CE_VALUE | ANIM_CE_SCORE | ANIM_CE_DELAY))
72 frame = sync_frame % num_frames;
75 if (mode & ANIM_REVERSE) /* use reverse animation direction */
76 frame = num_frames - frame - 1;
82 /* ========================================================================= */
83 /* toon animation functions */
84 /* ========================================================================= */
86 static int get_toon_direction(char *direction_string_raw)
88 char *direction_string = getStringToLower(direction_string_raw);
89 int direction = (strEqual(direction_string, "left") ? MV_LEFT :
90 strEqual(direction_string, "right") ? MV_RIGHT :
91 strEqual(direction_string, "up") ? MV_UP :
92 strEqual(direction_string, "down") ? MV_DOWN :
95 free(direction_string);
100 void InitToonScreen(Bitmap *save_buffer,
101 void (*update_function)(void),
102 void (*prepare_backbuffer_function)(void),
103 boolean (*redraw_needed_function)(void),
104 struct ToonInfo *toons, int num_toons,
105 int startx, int starty,
106 int width, int height,
107 int frame_delay_value)
109 screen_info.save_buffer = save_buffer;
110 screen_info.update_function = update_function;
111 screen_info.prepare_backbuffer_function = prepare_backbuffer_function;
112 screen_info.redraw_needed_function = redraw_needed_function;
113 screen_info.toons = toons;
114 screen_info.num_toons = num_toons;
115 screen_info.startx = startx;
116 screen_info.starty = starty;
117 screen_info.width = width;
118 screen_info.height = height;
119 screen_info.frame_delay_value = frame_delay_value;
122 void DrawAnim(Bitmap *toon_bitmap, GC toon_clip_gc,
123 int src_x, int src_y, int width, int height,
124 int dest_x, int dest_y, int pad_x, int pad_y)
126 int pad_dest_x = dest_x - pad_x;
127 int pad_dest_y = dest_y - pad_y;
128 int pad_width = width + 2 * pad_x;
129 int pad_height = height + 2 * pad_y;
134 int buffer_x = DOOR_GFX_PAGEX3;
135 int buffer_y = DOOR_GFX_PAGEY1;
139 printf("::: (%d, %d), (%d, %d), (%d, %d), (%d, %d) -> (%d, %d), (%d, %d), (%d, %d)\n",
145 pad_dest_x, pad_dest_y,
146 pad_width, pad_height,
150 /* correct values to avoid off-screen blitting (start position) */
151 if (pad_dest_x < screen_info.startx)
153 pad_width -= (screen_info.startx - pad_dest_x);
154 pad_dest_x = screen_info.startx;
156 if (pad_dest_y < screen_info.starty)
158 pad_height -= (screen_info.starty - pad_dest_y);
159 pad_dest_y = screen_info.starty;
162 /* correct values to avoid off-screen blitting (blit size) */
163 if (pad_width > screen_info.width)
164 pad_width = screen_info.width;
165 if (pad_height > screen_info.height)
166 pad_height = screen_info.height;
168 /* special method to avoid flickering interference with BackToFront() */
169 BlitBitmap(backbuffer, screen_info.save_buffer, pad_dest_x, pad_dest_y,
170 pad_width, pad_height, buffer_x, buffer_y);
171 SetClipOrigin(toon_bitmap, toon_clip_gc, dest_x - src_x, dest_y - src_y);
172 BlitBitmapMasked(toon_bitmap, backbuffer, src_x, src_y, width, height,
174 BlitBitmap(backbuffer, window, pad_dest_x, pad_dest_y, pad_width, pad_height,
175 pad_dest_x, pad_dest_y);
177 screen_info.update_function();
179 BlitBitmap(screen_info.save_buffer, backbuffer, buffer_x, buffer_y,
180 pad_width, pad_height, pad_dest_x, pad_dest_y);
185 boolean AnimateToon(int toon_nr, boolean restart)
187 static unsigned int animation_frame_counter = 0;
188 static int pos_x = 0, pos_y = 0;
189 static int delta_x = 0, delta_y = 0;
190 static int frame = 0;
191 static boolean horiz_move, vert_move;
192 static unsigned int anim_delay = 0;
193 static unsigned int anim_delay_value = 0;
194 static int width,height;
195 static int pad_x,pad_y;
196 static int cut_x,cut_y;
197 static int src_x, src_y;
198 static int dest_x, dest_y;
199 struct ToonInfo *anim = &screen_info.toons[toon_nr];
200 Bitmap *anim_bitmap = screen_info.toons[toon_nr].bitmap;
201 GC anim_clip_gc = anim_bitmap->stored_clip_gc;
202 int direction = get_toon_direction(anim->direction);
206 horiz_move = (direction & (MV_LEFT | MV_RIGHT));
207 vert_move = (direction & (MV_UP | MV_DOWN));
208 anim_delay_value = anim->step_delay * screen_info.frame_delay_value;
210 frame = getAnimationFrame(anim->anim_frames, anim->anim_delay,
211 anim->anim_mode, anim->anim_start_frame,
212 animation_frame_counter++);
216 int pos_bottom = screen_info.height - anim->height;
218 if (strEqual(anim->position, "top"))
220 else if (strEqual(anim->position, "bottom"))
222 else if (strEqual(anim->position, "upper"))
223 pos_y = GetSimpleRandom(pos_bottom / 2);
224 else if (strEqual(anim->position, "lower"))
225 pos_y = pos_bottom / 2 + GetSimpleRandom(pos_bottom / 2);
227 pos_y = GetSimpleRandom(pos_bottom);
229 if (direction == MV_RIGHT)
231 delta_x = anim->step_offset;
232 pos_x = -anim->width + delta_x;
236 delta_x = -anim->step_offset;
237 pos_x = screen_info.width + delta_x;
244 int pos_right = screen_info.width - anim->width;
246 if (strEqual(anim->position, "left"))
248 else if (strEqual(anim->position, "right"))
251 pos_x = GetSimpleRandom(pos_right);
253 if (direction == MV_DOWN)
255 delta_y = anim->step_offset;
256 pos_y = -anim->height + delta_y;
260 delta_y = -anim->step_offset;
261 pos_y = screen_info.height + delta_y;
268 if (pos_x <= -anim->width - anim->step_offset ||
269 pos_x >= screen_info.width + anim->step_offset ||
270 pos_y <= -anim->height - anim->step_offset ||
271 pos_y >= screen_info.height + anim->step_offset)
274 if (!DelayReached(&anim_delay, anim_delay_value))
276 if (screen_info.redraw_needed_function() && !restart)
277 DrawAnim(anim_bitmap, anim_clip_gc,
278 src_x + cut_x, src_y + cut_y,
280 screen_info.startx + dest_x,
281 screen_info.starty + dest_y,
287 if (pos_x < -anim->width)
288 pos_x = -anim->width;
289 else if (pos_x > screen_info.width)
290 pos_x = screen_info.width;
291 if (pos_y < -anim->height)
292 pos_y = -anim->height;
293 else if (pos_y > screen_info.height)
294 pos_y = screen_info.height;
296 pad_x = (horiz_move ? anim->step_offset : 0);
297 pad_y = (vert_move ? anim->step_offset : 0);
298 src_x = anim->src_x + frame * anim->width;
304 height = anim->height;
312 else if (pos_x > screen_info.width - anim->width)
313 width -= (pos_x - (screen_info.width - anim->width));
321 else if (pos_y > screen_info.height - anim->height)
322 height -= (pos_y - (screen_info.height - anim->height));
324 DrawAnim(anim_bitmap, anim_clip_gc,
325 src_x + cut_x, src_y + cut_y,
327 screen_info.startx + dest_x,
328 screen_info.starty + dest_y,
334 frame = getAnimationFrame(anim->anim_frames, anim->anim_delay,
335 anim->anim_mode, anim->anim_start_frame,
336 animation_frame_counter++);
341 void HandleAnimation(int mode)
343 static unsigned int animstart_delay = -1;
344 static unsigned int animstart_delay_value = 0;
345 static boolean anim_running = FALSE;
346 static boolean anim_restart = TRUE;
347 static boolean reset_delay = TRUE;
348 static int toon_nr = 0;
350 if (!setup.toons || screen_info.num_toons == 0)
353 /* this may happen after reloading graphics and redefining "num_toons" */
354 if (toon_nr >= screen_info.num_toons)
360 screen_info.prepare_backbuffer_function();
378 redraw_mask |= (REDRAW_FIELD | REDRAW_FROM_BACKBUFFER);
380 screen_info.update_function();
383 anim_running = FALSE;
394 animstart_delay = Counter();
395 animstart_delay_value = GetSimpleRandom(3000);
401 if (!DelayReached(&animstart_delay, animstart_delay_value))
404 toon_nr = GetSimpleRandom(screen_info.num_toons);
407 anim_restart = reset_delay = AnimateToon(toon_nr, anim_restart);
412 HandleAnimation(ANIM_START);
417 HandleAnimation(ANIM_STOP);
422 HandleAnimation(ANIM_CONTINUE);