Remove building with NOCRYPTO option
[minix.git] / games / tetris / screen.c
blob1babdb498800a73ec82128e71f715f37e442cf82
1 /* $NetBSD: screen.c,v 1.30 2015/07/07 22:53:25 nat Exp $ */
3 /*-
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
8 * Chris Torek and Darren F. Provine.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
34 * @(#)screen.c 8.1 (Berkeley) 5/31/93
38 * Tetris screen control.
41 #include <sys/cdefs.h>
42 #include <sys/ioctl.h>
44 #include <setjmp.h>
45 #include <signal.h>
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <string.h>
49 #include <term.h>
50 #include <termios.h>
51 #include <unistd.h>
53 #ifndef sigmask
54 #define sigmask(s) (1 << ((s) - 1))
55 #endif
57 #include "screen.h"
58 #include "tetris.h"
60 static cell curscreen[B_SIZE]; /* 1 => standout (or otherwise marked) */
61 static int curscore;
62 static int isset; /* true => terminal is in game mode */
63 static struct termios oldtt;
64 static void (*tstp)(int);
66 static void scr_stop(int);
67 static void stopset(int) __dead;
71 * Routine used by tputs().
73 int
74 put(int c)
77 return (putchar(c));
81 * putstr() is for unpadded strings (either as in termcap(5) or
82 * simply literal strings); putpad() is for padded strings with
83 * count=1. (See screen.h for putpad().)
85 #define putstr(s) (void)fputs(s, stdout)
87 static void
88 moveto(int r, int c)
90 char *buf;
92 buf = tiparm(cursor_address, r, c);
93 if (buf != NULL)
94 putpad(buf);
97 static void
98 setcolor(int c)
100 char *buf;
101 char monochrome[] = "\033[0m";
102 if (nocolor == 1)
103 return;
104 if (set_a_foreground == NULL)
105 return;
107 if (c == 0 || c == 7)
108 buf = monochrome;
109 else
110 buf = tiparm(set_a_foreground, c);
111 if (buf != NULL)
112 putpad(buf);
116 * Set up from termcap.
118 void
119 scr_init(void)
122 setupterm(NULL, 0, NULL);
123 if (clear_screen == NULL)
124 stop("cannot clear screen");
125 if (cursor_address == NULL || cursor_up == NULL)
126 stop("cannot do random cursor positioning");
129 /* this foolery is needed to modify tty state `atomically' */
130 static jmp_buf scr_onstop;
132 static void
133 stopset(int sig)
135 sigset_t set;
137 (void) signal(sig, SIG_DFL);
138 (void) kill(getpid(), sig);
139 sigemptyset(&set);
140 sigaddset(&set, sig);
141 (void) sigprocmask(SIG_UNBLOCK, &set, (sigset_t *)0);
142 longjmp(scr_onstop, 1);
145 static void
146 scr_stop(int sig)
148 sigset_t set;
150 scr_end();
151 (void) kill(getpid(), sig);
152 sigemptyset(&set);
153 sigaddset(&set, sig);
154 (void) sigprocmask(SIG_UNBLOCK, &set, (sigset_t *)0);
155 scr_set();
156 scr_msg(key_msg, 1);
160 * Set up screen mode.
162 void
163 scr_set(void)
165 struct winsize ws;
166 struct termios newtt;
167 sigset_t nsigset, osigset;
168 void (*ttou)(int);
170 sigemptyset(&nsigset);
171 sigaddset(&nsigset, SIGTSTP);
172 sigaddset(&nsigset, SIGTTOU);
173 (void) sigprocmask(SIG_BLOCK, &nsigset, &osigset);
174 if ((tstp = signal(SIGTSTP, stopset)) == SIG_IGN)
175 (void) signal(SIGTSTP, SIG_IGN);
176 if ((ttou = signal(SIGTTOU, stopset)) == SIG_IGN)
177 (void) signal(SIGTTOU, SIG_IGN);
179 * At last, we are ready to modify the tty state. If
180 * we stop while at it, stopset() above will longjmp back
181 * to the setjmp here and we will start over.
183 (void) setjmp(scr_onstop);
184 (void) sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
185 Rows = 0, Cols = 0;
186 if (ioctl(0, TIOCGWINSZ, &ws) == 0) {
187 Rows = ws.ws_row;
188 Cols = ws.ws_col;
190 if (Rows == 0)
191 Rows = lines;
192 if (Cols == 0)
193 Cols = columns;
194 if (Rows < MINROWS || Cols < MINCOLS) {
195 (void) fprintf(stderr,
196 "the screen is too small: must be at least %dx%d, ",
197 MINCOLS, MINROWS);
198 stop(""); /* stop() supplies \n */
200 if (tcgetattr(0, &oldtt) < 0)
201 stop("tcgetattr() fails");
202 newtt = oldtt;
203 newtt.c_lflag &= ~(ICANON|ECHO);
204 newtt.c_oflag &= ~OXTABS;
205 if (tcsetattr(0, TCSADRAIN, &newtt) < 0)
206 stop("tcsetattr() fails");
207 ospeed = cfgetospeed(&newtt);
208 (void) sigprocmask(SIG_BLOCK, &nsigset, &osigset);
211 * We made it. We are now in screen mode, modulo TIstr
212 * (which we will fix immediately).
214 if (enter_ca_mode)
215 putstr(enter_ca_mode);
216 if (cursor_invisible)
217 putstr(cursor_invisible);
218 if (tstp != SIG_IGN)
219 (void) signal(SIGTSTP, scr_stop);
220 if (ttou != SIG_IGN)
221 (void) signal(SIGTTOU, ttou);
223 isset = 1;
224 (void) sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
225 scr_clear();
229 * End screen mode.
231 void
232 scr_end(void)
234 sigset_t nsigset, osigset;
236 sigemptyset(&nsigset);
237 sigaddset(&nsigset, SIGTSTP);
238 sigaddset(&nsigset, SIGTTOU);
239 (void) sigprocmask(SIG_BLOCK, &nsigset, &osigset);
240 /* move cursor to last line */
241 if (cursor_to_ll)
242 putstr(cursor_to_ll);
243 else
244 moveto(Rows - 1, 0);
245 /* exit screen mode */
246 if (exit_ca_mode)
247 putstr(exit_ca_mode);
248 if (cursor_normal)
249 putstr(cursor_normal);
250 (void) fflush(stdout);
251 (void) tcsetattr(0, TCSADRAIN, &oldtt);
252 isset = 0;
253 /* restore signals */
254 (void) signal(SIGTSTP, tstp);
255 (void) sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
258 void
259 stop(const char *why)
262 if (isset)
263 scr_end();
264 (void) fprintf(stderr, "aborting: %s\n", why);
265 exit(1);
269 * Clear the screen, forgetting the current contents in the process.
271 void
272 scr_clear(void)
275 putpad(clear_screen);
276 curscore = -1;
277 memset((char *)curscreen, 0, sizeof(curscreen));
280 #if vax && !__GNUC__
281 typedef int regcell; /* pcc is bad at `register char', etc */
282 #else
283 typedef cell regcell;
284 #endif
287 * Update the screen.
289 void
290 scr_update(void)
292 cell *bp, *sp;
293 regcell so, cur_so = 0;
294 int i, ccol, j;
295 sigset_t nsigset, osigset;
296 static const struct shape *lastshape;
298 sigemptyset(&nsigset);
299 sigaddset(&nsigset, SIGTSTP);
300 (void) sigprocmask(SIG_BLOCK, &nsigset, &osigset);
302 /* always leave cursor after last displayed point */
303 curscreen[D_LAST * B_COLS - 1] = -1;
305 if (score != curscore) {
306 if (cursor_home)
307 putpad(cursor_home);
308 else
309 moveto(0, 0);
310 setcolor(0);
311 (void) printf("Score: %d", score);
312 curscore = score;
315 /* draw preview of nextpattern */
316 if (showpreview && (nextshape != lastshape)) {
317 static int r=5, c=2;
318 int tr, tc, t;
320 lastshape = nextshape;
322 /* clean */
323 putpad(exit_standout_mode);
324 moveto(r-1, c-1); putstr(" ");
325 moveto(r, c-1); putstr(" ");
326 moveto(r+1, c-1); putstr(" ");
327 moveto(r+2, c-1); putstr(" ");
329 moveto(r-3, c-2);
330 putstr("Next shape:");
332 /* draw */
333 putpad(enter_standout_mode);
334 setcolor(nextshape->color);
335 moveto(r, 2*c);
336 putstr(" ");
337 for(i=0; i<3; i++) {
338 t = c + r*B_COLS;
339 t += nextshape->off[i];
341 tr = t / B_COLS;
342 tc = t % B_COLS;
344 moveto(tr, 2*tc);
345 putstr(" ");
347 putpad(exit_standout_mode);
350 bp = &board[D_FIRST * B_COLS];
351 sp = &curscreen[D_FIRST * B_COLS];
352 for (j = D_FIRST; j < D_LAST; j++) {
353 ccol = -1;
354 for (i = 0; i < B_COLS; bp++, sp++, i++) {
355 if (*sp == (so = *bp))
356 continue;
357 *sp = so;
358 if (i != ccol) {
359 if (cur_so && move_standout_mode) {
360 putpad(exit_standout_mode);
361 cur_so = 0;
363 moveto(RTOD(j), CTOD(i));
365 if (enter_standout_mode) {
366 if (so != cur_so) {
367 setcolor(so);
368 putpad(so ?
369 enter_standout_mode :
370 exit_standout_mode);
371 cur_so = so;
373 #ifdef DEBUG
374 char buf[3];
375 snprintf(buf, sizeof(buf), "%d%d", so, so);
376 putstr(buf);
377 #else
378 putstr(" ");
379 #endif
380 } else
381 putstr(so ? "XX" : " ");
382 ccol = i + 1;
384 * Look ahead a bit, to avoid extra motion if
385 * we will be redrawing the cell after the next.
386 * Motion probably takes four or more characters,
387 * so we save even if we rewrite two cells
388 * `unnecessarily'. Skip it all, though, if
389 * the next cell is a different color.
391 #define STOP (B_COLS - 3)
392 if (i > STOP || sp[1] != bp[1] || so != bp[1])
393 continue;
394 if (sp[2] != bp[2])
395 sp[1] = -1;
396 else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {
397 sp[2] = -1;
398 sp[1] = -1;
402 if (cur_so)
403 putpad(exit_standout_mode);
404 (void) fflush(stdout);
405 (void) sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
409 * Write a message (set!=0), or clear the same message (set==0).
410 * (We need its length in case we have to overwrite with blanks.)
412 void
413 scr_msg(char *s, int set)
416 if (set || clr_eol == NULL) {
417 int l = strlen(s);
419 moveto(Rows - 2, ((Cols - l) >> 1) - 1);
420 if (set)
421 putstr(s);
422 else
423 while (--l >= 0)
424 (void) putchar(' ');
425 } else {
426 moveto(Rows - 2, 0);
427 putpad(clr_eol);