2 * midend.c: general middle fragment sitting between the
3 * platform-specific front end and game-specific back end.
4 * Maintains a move list, takes care of Undo and Redo commands, and
5 * processes standard keystrokes for undo/redo/new/restart/quit.
20 int nstates, statesize, statepos;
22 game_params **presets;
24 int npresets, presetsize;
28 game_drawstate *drawstate;
30 float anim_time, anim_pos;
31 float flash_time, flash_pos;
34 #define ensure(me) do { \
35 if ((me)->nstates >= (me)->statesize) { \
36 (me)->statesize = (me)->nstates + 128; \
37 (me)->states = sresize((me)->states, (me)->statesize, game_state *); \
41 midend_data *midend_new(frontend *fe, void *randseed, int randseedsize)
43 midend_data *me = snew(midend_data);
46 me->random = random_init(randseed, randseedsize);
47 me->nstates = me->statesize = me->statepos = 0;
49 me->params = default_params();
51 me->fresh_seed = FALSE;
55 me->preset_names = NULL;
56 me->npresets = me->presetsize = 0;
57 me->anim_time = me->anim_pos = 0.0F;
58 me->flash_time = me->flash_pos = 0.0F;
63 void midend_free(midend_data *me)
67 free_params(me->params);
71 void midend_size(midend_data *me, int *x, int *y)
73 game_size(me->params, x, y);
76 void midend_set_params(midend_data *me, game_params *params)
78 free_params(me->params);
79 me->params = dup_params(params);
82 void midend_new_game(midend_data *me)
84 while (me->nstates > 0)
85 free_game(me->states[--me->nstates]);
88 game_free_drawstate(me->drawstate);
90 assert(me->nstates == 0);
92 if (!me->fresh_seed) {
94 me->seed = new_game_seed(me->params, me->random);
96 me->fresh_seed = FALSE;
99 me->states[me->nstates++] = new_game(me->params, me->seed);
101 me->drawstate = game_new_drawstate(me->states[0]);
104 void midend_restart_game(midend_data *me)
106 while (me->nstates > 1)
107 free_game(me->states[--me->nstates]);
108 me->statepos = me->nstates;
111 static int midend_undo(midend_data *me)
113 if (me->statepos > 1) {
120 static int midend_redo(midend_data *me)
122 if (me->statepos < me->nstates) {
129 static void midend_finish_move(midend_data *me)
133 if (me->oldstate || me->statepos > 1) {
134 flashtime = game_flash_length(me->oldstate ? me->oldstate :
135 me->states[me->statepos-2],
136 me->states[me->statepos-1]);
138 me->flash_pos = 0.0F;
139 me->flash_time = flashtime;
144 free_game(me->oldstate);
146 me->anim_pos = me->anim_time = 0;
148 if (me->flash_time == 0 && me->anim_time == 0)
149 deactivate_timer(me->frontend);
151 activate_timer(me->frontend);
154 int midend_process_key(midend_data *me, int x, int y, int button)
156 game_state *oldstate = dup_game(me->states[me->statepos - 1]);
159 if (me->oldstate || me->anim_time) {
160 midend_finish_move(me);
164 if (button == 'n' || button == 'N' || button == '\x0E') {
167 return 1; /* never animate */
168 } else if (button == 'r' || button == 'R') {
169 midend_restart_game(me);
171 return 1; /* never animate */
172 } else if (button == 'u' || button == 'u' ||
173 button == '\x1A' || button == '\x1F') {
174 if (!midend_undo(me))
176 } else if (button == '\x12') {
177 if (!midend_redo(me))
179 } else if (button == 'q' || button == 'Q' || button == '\x11') {
183 game_state *s = make_move(me->states[me->statepos-1], x, y, button);
186 while (me->nstates > me->statepos)
187 free_game(me->states[--me->nstates]);
189 me->states[me->nstates] = s;
190 me->statepos = ++me->nstates;
198 * See if this move requires an animation.
200 anim_time = game_anim_length(oldstate, me->states[me->statepos-1]);
202 me->oldstate = oldstate;
204 me->anim_time = anim_time;
207 midend_finish_move(me);
213 activate_timer(me->frontend);
218 void midend_redraw(midend_data *me)
220 if (me->statepos > 0 && me->drawstate) {
221 start_draw(me->frontend);
222 if (me->oldstate && me->anim_time > 0 &&
223 me->anim_pos < me->anim_time) {
224 game_redraw(me->frontend, me->drawstate, me->oldstate,
225 me->states[me->statepos-1], me->anim_pos,
228 game_redraw(me->frontend, me->drawstate, NULL,
229 me->states[me->statepos-1], 0.0, me->flash_pos);
231 end_draw(me->frontend);
235 void midend_timer(midend_data *me, float tplus)
237 me->anim_pos += tplus;
238 if (me->anim_pos >= me->anim_time ||
239 me->anim_time == 0 || !me->oldstate) {
240 if (me->anim_time > 0)
241 midend_finish_move(me);
243 me->flash_pos += tplus;
244 if (me->flash_pos >= me->flash_time || me->flash_time == 0) {
245 me->flash_pos = me->flash_time = 0;
247 if (me->flash_time == 0 && me->anim_time == 0)
248 deactivate_timer(me->frontend);
252 float *midend_colours(midend_data *me, int *ncolours)
254 game_state *state = NULL;
257 if (me->nstates == 0) {
258 char *seed = new_game_seed(me->params, me->random);
259 state = new_game(me->params, seed);
262 state = me->states[0];
264 ret = game_colours(me->frontend, state, ncolours);
266 if (me->nstates == 0)
272 int midend_num_presets(midend_data *me)
278 while (game_fetch_preset(me->npresets, &name, &preset)) {
279 if (me->presetsize <= me->npresets) {
280 me->presetsize = me->npresets + 10;
281 me->presets = sresize(me->presets, me->presetsize,
283 me->preset_names = sresize(me->preset_names, me->presetsize,
287 me->presets[me->npresets] = preset;
288 me->preset_names[me->npresets] = name;
296 void midend_fetch_preset(midend_data *me, int n,
297 char **name, game_params **params)
299 assert(n >= 0 && n < me->npresets);
300 *name = me->preset_names[n];
301 *params = me->presets[n];
304 int midend_wants_statusbar(midend_data *me)
306 return game_wants_statusbar();
309 config_item *midend_get_config(midend_data *me, int which, char **wintitle)
314 titlebuf = snewn(40 + strlen(game_name), char);
318 sprintf(titlebuf, "%s configuration", game_name);
319 *wintitle = dupstr(titlebuf);
320 return game_configure(me->params);
322 sprintf(titlebuf, "%s game selection", game_name);
323 *wintitle = dupstr(titlebuf);
325 ret = snewn(2, config_item);
327 ret[0].type = C_STRING;
328 ret[0].name = "Game ID";
330 ret[0].sval = dupstr(me->seed);
333 ret[1].name = ret[1].sval = NULL;
339 assert(!"We shouldn't be here");
343 char *midend_set_config(midend_data *me, int which, config_item *cfg)
350 params = custom_params(cfg);
351 error = validate_params(params);
358 free_params(me->params);
363 error = validate_seed(me->params, cfg[0].sval);
368 me->seed = dupstr(cfg[0].sval);
369 me->fresh_seed = TRUE;