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;
133 /* correct values to avoid off-screen blitting (start position) */
134 if (pad_dest_x < screen_info.startx)
136 pad_width -= (screen_info.startx - pad_dest_x);
137 pad_dest_x = screen_info.startx;
139 if (pad_dest_y < screen_info.starty)
141 pad_height -= (screen_info.starty - pad_dest_y);
142 pad_dest_y = screen_info.starty;
145 /* correct values to avoid off-screen blitting (blit size) */
146 if (pad_width > screen_info.width)
147 pad_width = screen_info.width;
148 if (pad_height > screen_info.height)
149 pad_height = screen_info.height;
151 /* special method to avoid flickering interference with BackToFront() */
152 BlitBitmap(backbuffer, screen_info.save_buffer, pad_dest_x, pad_dest_y,
153 pad_width, pad_height, buffer_x, buffer_y);
154 SetClipOrigin(toon_bitmap, toon_clip_gc, dest_x - src_x, dest_y - src_y);
155 BlitBitmapMasked(toon_bitmap, backbuffer, src_x, src_y, width, height,
157 BlitBitmap(backbuffer, window, pad_dest_x, pad_dest_y, pad_width, pad_height,
158 pad_dest_x, pad_dest_y);
160 screen_info.update_function();
162 BlitBitmap(screen_info.save_buffer, backbuffer, buffer_x, buffer_y,
163 pad_width, pad_height, pad_dest_x, pad_dest_y);
168 boolean AnimateToon(int toon_nr, boolean restart)
170 static unsigned int animation_frame_counter = 0;
171 static int pos_x = 0, pos_y = 0;
172 static int delta_x = 0, delta_y = 0;
173 static int frame = 0;
174 static boolean horiz_move, vert_move;
175 static unsigned int anim_delay = 0;
176 static unsigned int anim_delay_value = 0;
177 static int width,height;
178 static int pad_x,pad_y;
179 static int cut_x,cut_y;
180 static int src_x, src_y;
181 static int dest_x, dest_y;
182 struct ToonInfo *anim = &screen_info.toons[toon_nr];
183 Bitmap *anim_bitmap = screen_info.toons[toon_nr].bitmap;
184 GC anim_clip_gc = anim_bitmap->stored_clip_gc;
185 int direction = get_toon_direction(anim->direction);
189 horiz_move = (direction & (MV_LEFT | MV_RIGHT));
190 vert_move = (direction & (MV_UP | MV_DOWN));
191 anim_delay_value = anim->step_delay * screen_info.frame_delay_value;
193 frame = getAnimationFrame(anim->anim_frames, anim->anim_delay,
194 anim->anim_mode, anim->anim_start_frame,
195 animation_frame_counter++);
199 int pos_bottom = screen_info.height - anim->height;
201 if (strEqual(anim->position, "top"))
203 else if (strEqual(anim->position, "bottom"))
205 else if (strEqual(anim->position, "upper"))
206 pos_y = GetSimpleRandom(pos_bottom / 2);
207 else if (strEqual(anim->position, "lower"))
208 pos_y = pos_bottom / 2 + GetSimpleRandom(pos_bottom / 2);
210 pos_y = GetSimpleRandom(pos_bottom);
212 if (direction == MV_RIGHT)
214 delta_x = anim->step_offset;
215 pos_x = -anim->width + delta_x;
219 delta_x = -anim->step_offset;
220 pos_x = screen_info.width + delta_x;
227 int pos_right = screen_info.width - anim->width;
229 if (strEqual(anim->position, "left"))
231 else if (strEqual(anim->position, "right"))
234 pos_x = GetSimpleRandom(pos_right);
236 if (direction == MV_DOWN)
238 delta_y = anim->step_offset;
239 pos_y = -anim->height + delta_y;
243 delta_y = -anim->step_offset;
244 pos_y = screen_info.height + delta_y;
251 if (pos_x <= -anim->width - anim->step_offset ||
252 pos_x >= screen_info.width + anim->step_offset ||
253 pos_y <= -anim->height - anim->step_offset ||
254 pos_y >= screen_info.height + anim->step_offset)
257 if (!DelayReached(&anim_delay, anim_delay_value))
259 if (screen_info.redraw_needed_function() && !restart)
260 DrawAnim(anim_bitmap, anim_clip_gc,
261 src_x + cut_x, src_y + cut_y,
263 screen_info.startx + dest_x,
264 screen_info.starty + dest_y,
270 if (pos_x < -anim->width)
271 pos_x = -anim->width;
272 else if (pos_x > screen_info.width)
273 pos_x = screen_info.width;
274 if (pos_y < -anim->height)
275 pos_y = -anim->height;
276 else if (pos_y > screen_info.height)
277 pos_y = screen_info.height;
279 pad_x = (horiz_move ? anim->step_offset : 0);
280 pad_y = (vert_move ? anim->step_offset : 0);
281 src_x = anim->src_x + frame * anim->width;
287 height = anim->height;
295 else if (pos_x > screen_info.width - anim->width)
296 width -= (pos_x - (screen_info.width - anim->width));
304 else if (pos_y > screen_info.height - anim->height)
305 height -= (pos_y - (screen_info.height - anim->height));
307 DrawAnim(anim_bitmap, anim_clip_gc,
308 src_x + cut_x, src_y + cut_y,
310 screen_info.startx + dest_x,
311 screen_info.starty + dest_y,
317 frame = getAnimationFrame(anim->anim_frames, anim->anim_delay,
318 anim->anim_mode, anim->anim_start_frame,
319 animation_frame_counter++);
324 void HandleAnimation(int mode)
326 static unsigned int animstart_delay = -1;
327 static unsigned int animstart_delay_value = 0;
328 static boolean anim_running = FALSE;
329 static boolean anim_restart = TRUE;
330 static boolean reset_delay = TRUE;
331 static int toon_nr = 0;
333 if (!setup.toons || screen_info.num_toons == 0)
336 /* this may happen after reloading graphics and redefining "num_toons" */
337 if (toon_nr >= screen_info.num_toons)
343 screen_info.prepare_backbuffer_function();
360 redraw_mask |= (REDRAW_FIELD | REDRAW_FROM_BACKBUFFER);
362 screen_info.update_function();
364 anim_running = FALSE;
375 animstart_delay = Counter();
376 animstart_delay_value = GetSimpleRandom(3000);
382 if (!DelayReached(&animstart_delay, animstart_delay_value))
385 toon_nr = GetSimpleRandom(screen_info.num_toons);
388 anim_restart = reset_delay = AnimateToon(toon_nr, anim_restart);
393 HandleAnimation(ANIM_START);
398 HandleAnimation(ANIM_STOP);
403 HandleAnimation(ANIM_CONTINUE);