402 lines
9.1 KiB
C
402 lines
9.1 KiB
C
/* $NetBSD: screen.c,v 1.27 2011/10/03 12:32:28 roy Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1992, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Chris Torek and Darren F. Provine.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)screen.c 8.1 (Berkeley) 5/31/93
|
|
*/
|
|
|
|
/*
|
|
* Tetris screen control.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#include <sys/ioctl.h>
|
|
|
|
#include <setjmp.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <term.h>
|
|
#include <termios.h>
|
|
#include <unistd.h>
|
|
|
|
#ifndef sigmask
|
|
#define sigmask(s) (1 << ((s) - 1))
|
|
#endif
|
|
|
|
#include "screen.h"
|
|
#include "tetris.h"
|
|
|
|
static cell curscreen[B_SIZE]; /* 1 => standout (or otherwise marked) */
|
|
static int curscore;
|
|
static int isset; /* true => terminal is in game mode */
|
|
static struct termios oldtt;
|
|
static void (*tstp)(int);
|
|
|
|
static void scr_stop(int);
|
|
static void stopset(int) __dead;
|
|
|
|
|
|
/*
|
|
* Routine used by tputs().
|
|
*/
|
|
int
|
|
put(int c)
|
|
{
|
|
|
|
return (putchar(c));
|
|
}
|
|
|
|
/*
|
|
* putstr() is for unpadded strings (either as in termcap(5) or
|
|
* simply literal strings); putpad() is for padded strings with
|
|
* count=1. (See screen.h for putpad().)
|
|
*/
|
|
#define putstr(s) (void)fputs(s, stdout)
|
|
|
|
static void
|
|
moveto(int r, int c)
|
|
{
|
|
char *buf;
|
|
|
|
buf = tiparm(cursor_address, r, c);
|
|
if (buf != NULL)
|
|
putpad(buf);
|
|
}
|
|
|
|
/*
|
|
* Set up from termcap.
|
|
*/
|
|
void
|
|
scr_init(void)
|
|
{
|
|
|
|
setupterm(NULL, 0, NULL);
|
|
if (clear_screen == NULL)
|
|
stop("cannot clear screen");
|
|
if (cursor_address == NULL || cursor_up == NULL)
|
|
stop("cannot do random cursor positioning");
|
|
}
|
|
|
|
/* this foolery is needed to modify tty state `atomically' */
|
|
static jmp_buf scr_onstop;
|
|
|
|
static void
|
|
stopset(int sig)
|
|
{
|
|
sigset_t set;
|
|
|
|
(void) signal(sig, SIG_DFL);
|
|
(void) kill(getpid(), sig);
|
|
sigemptyset(&set);
|
|
sigaddset(&set, sig);
|
|
(void) sigprocmask(SIG_UNBLOCK, &set, (sigset_t *)0);
|
|
longjmp(scr_onstop, 1);
|
|
}
|
|
|
|
static void
|
|
scr_stop(int sig)
|
|
{
|
|
sigset_t set;
|
|
|
|
scr_end();
|
|
(void) kill(getpid(), sig);
|
|
sigemptyset(&set);
|
|
sigaddset(&set, sig);
|
|
(void) sigprocmask(SIG_UNBLOCK, &set, (sigset_t *)0);
|
|
scr_set();
|
|
scr_msg(key_msg, 1);
|
|
}
|
|
|
|
/*
|
|
* Set up screen mode.
|
|
*/
|
|
void
|
|
scr_set(void)
|
|
{
|
|
struct winsize ws;
|
|
struct termios newtt;
|
|
sigset_t nsigset, osigset;
|
|
void (*ttou)(int);
|
|
|
|
sigemptyset(&nsigset);
|
|
sigaddset(&nsigset, SIGTSTP);
|
|
sigaddset(&nsigset, SIGTTOU);
|
|
(void) sigprocmask(SIG_BLOCK, &nsigset, &osigset);
|
|
if ((tstp = signal(SIGTSTP, stopset)) == SIG_IGN)
|
|
(void) signal(SIGTSTP, SIG_IGN);
|
|
if ((ttou = signal(SIGTTOU, stopset)) == SIG_IGN)
|
|
(void) signal(SIGTTOU, SIG_IGN);
|
|
/*
|
|
* At last, we are ready to modify the tty state. If
|
|
* we stop while at it, stopset() above will longjmp back
|
|
* to the setjmp here and we will start over.
|
|
*/
|
|
(void) setjmp(scr_onstop);
|
|
(void) sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
|
|
Rows = 0, Cols = 0;
|
|
if (ioctl(0, TIOCGWINSZ, &ws) == 0) {
|
|
Rows = ws.ws_row;
|
|
Cols = ws.ws_col;
|
|
}
|
|
if (Rows == 0)
|
|
Rows = lines;
|
|
if (Cols == 0)
|
|
Cols = columns;
|
|
if (Rows < MINROWS || Cols < MINCOLS) {
|
|
(void) fprintf(stderr,
|
|
"the screen is too small: must be at least %dx%d, ",
|
|
MINCOLS, MINROWS);
|
|
stop(""); /* stop() supplies \n */
|
|
}
|
|
if (tcgetattr(0, &oldtt) < 0)
|
|
stop("tcgetattr() fails");
|
|
newtt = oldtt;
|
|
newtt.c_lflag &= ~(ICANON|ECHO);
|
|
newtt.c_oflag &= ~OXTABS;
|
|
if (tcsetattr(0, TCSADRAIN, &newtt) < 0)
|
|
stop("tcsetattr() fails");
|
|
ospeed = cfgetospeed(&newtt);
|
|
(void) sigprocmask(SIG_BLOCK, &nsigset, &osigset);
|
|
|
|
/*
|
|
* We made it. We are now in screen mode, modulo TIstr
|
|
* (which we will fix immediately).
|
|
*/
|
|
if (enter_ca_mode)
|
|
putstr(enter_ca_mode);
|
|
if (cursor_invisible)
|
|
putstr(cursor_invisible);
|
|
if (tstp != SIG_IGN)
|
|
(void) signal(SIGTSTP, scr_stop);
|
|
if (ttou != SIG_IGN)
|
|
(void) signal(SIGTTOU, ttou);
|
|
|
|
isset = 1;
|
|
(void) sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
|
|
scr_clear();
|
|
}
|
|
|
|
/*
|
|
* End screen mode.
|
|
*/
|
|
void
|
|
scr_end(void)
|
|
{
|
|
sigset_t nsigset, osigset;
|
|
|
|
sigemptyset(&nsigset);
|
|
sigaddset(&nsigset, SIGTSTP);
|
|
sigaddset(&nsigset, SIGTTOU);
|
|
(void) sigprocmask(SIG_BLOCK, &nsigset, &osigset);
|
|
/* move cursor to last line */
|
|
if (cursor_to_ll)
|
|
putstr(cursor_to_ll);
|
|
else
|
|
moveto(Rows - 1, 0);
|
|
/* exit screen mode */
|
|
if (exit_ca_mode)
|
|
putstr(exit_ca_mode);
|
|
if (cursor_normal)
|
|
putstr(cursor_normal);
|
|
(void) fflush(stdout);
|
|
(void) tcsetattr(0, TCSADRAIN, &oldtt);
|
|
isset = 0;
|
|
/* restore signals */
|
|
(void) signal(SIGTSTP, tstp);
|
|
(void) sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
|
|
}
|
|
|
|
void
|
|
stop(const char *why)
|
|
{
|
|
|
|
if (isset)
|
|
scr_end();
|
|
(void) fprintf(stderr, "aborting: %s\n", why);
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* Clear the screen, forgetting the current contents in the process.
|
|
*/
|
|
void
|
|
scr_clear(void)
|
|
{
|
|
|
|
putpad(clear_screen);
|
|
curscore = -1;
|
|
memset((char *)curscreen, 0, sizeof(curscreen));
|
|
}
|
|
|
|
#if vax && !__GNUC__
|
|
typedef int regcell; /* pcc is bad at `register char', etc */
|
|
#else
|
|
typedef cell regcell;
|
|
#endif
|
|
|
|
/*
|
|
* Update the screen.
|
|
*/
|
|
void
|
|
scr_update(void)
|
|
{
|
|
cell *bp, *sp;
|
|
regcell so, cur_so = 0;
|
|
int i, ccol, j;
|
|
sigset_t nsigset, osigset;
|
|
static const struct shape *lastshape;
|
|
|
|
sigemptyset(&nsigset);
|
|
sigaddset(&nsigset, SIGTSTP);
|
|
(void) sigprocmask(SIG_BLOCK, &nsigset, &osigset);
|
|
|
|
/* always leave cursor after last displayed point */
|
|
curscreen[D_LAST * B_COLS - 1] = -1;
|
|
|
|
if (score != curscore) {
|
|
if (cursor_home)
|
|
putpad(cursor_home);
|
|
else
|
|
moveto(0, 0);
|
|
(void) printf("Score: %d", score);
|
|
curscore = score;
|
|
}
|
|
|
|
/* draw preview of nextpattern */
|
|
if (showpreview && (nextshape != lastshape)) {
|
|
static int r=5, c=2;
|
|
int tr, tc, t;
|
|
|
|
lastshape = nextshape;
|
|
|
|
/* clean */
|
|
putpad(exit_standout_mode);
|
|
moveto(r-1, c-1); putstr(" ");
|
|
moveto(r, c-1); putstr(" ");
|
|
moveto(r+1, c-1); putstr(" ");
|
|
moveto(r+2, c-1); putstr(" ");
|
|
|
|
moveto(r-3, c-2);
|
|
putstr("Next shape:");
|
|
|
|
/* draw */
|
|
putpad(enter_standout_mode);
|
|
moveto(r, 2*c);
|
|
putstr(" ");
|
|
for(i=0; i<3; i++) {
|
|
t = c + r*B_COLS;
|
|
t += nextshape->off[i];
|
|
|
|
tr = t / B_COLS;
|
|
tc = t % B_COLS;
|
|
|
|
moveto(tr, 2*tc);
|
|
putstr(" ");
|
|
}
|
|
putpad(exit_standout_mode);
|
|
}
|
|
|
|
bp = &board[D_FIRST * B_COLS];
|
|
sp = &curscreen[D_FIRST * B_COLS];
|
|
for (j = D_FIRST; j < D_LAST; j++) {
|
|
ccol = -1;
|
|
for (i = 0; i < B_COLS; bp++, sp++, i++) {
|
|
if (*sp == (so = *bp))
|
|
continue;
|
|
*sp = so;
|
|
if (i != ccol) {
|
|
if (cur_so && move_standout_mode) {
|
|
putpad(exit_standout_mode);
|
|
cur_so = 0;
|
|
}
|
|
moveto(RTOD(j), CTOD(i));
|
|
}
|
|
if (enter_standout_mode) {
|
|
if (so != cur_so) {
|
|
putpad(so ?
|
|
enter_standout_mode :
|
|
exit_standout_mode);
|
|
cur_so = so;
|
|
}
|
|
putstr(" ");
|
|
} else
|
|
putstr(so ? "XX" : " ");
|
|
ccol = i + 1;
|
|
/*
|
|
* Look ahead a bit, to avoid extra motion if
|
|
* we will be redrawing the cell after the next.
|
|
* Motion probably takes four or more characters,
|
|
* so we save even if we rewrite two cells
|
|
* `unnecessarily'. Skip it all, though, if
|
|
* the next cell is a different color.
|
|
*/
|
|
#define STOP (B_COLS - 3)
|
|
if (i > STOP || sp[1] != bp[1] || so != bp[1])
|
|
continue;
|
|
if (sp[2] != bp[2])
|
|
sp[1] = -1;
|
|
else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {
|
|
sp[2] = -1;
|
|
sp[1] = -1;
|
|
}
|
|
}
|
|
}
|
|
if (cur_so)
|
|
putpad(exit_standout_mode);
|
|
(void) fflush(stdout);
|
|
(void) sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
|
|
}
|
|
|
|
/*
|
|
* Write a message (set!=0), or clear the same message (set==0).
|
|
* (We need its length in case we have to overwrite with blanks.)
|
|
*/
|
|
void
|
|
scr_msg(char *s, int set)
|
|
{
|
|
|
|
if (set || clr_eol == NULL) {
|
|
int l = strlen(s);
|
|
|
|
moveto(Rows - 2, ((Cols - l) >> 1) - 1);
|
|
if (set)
|
|
putstr(s);
|
|
else
|
|
while (--l >= 0)
|
|
(void) putchar(' ');
|
|
} else {
|
|
moveto(Rows - 2, 0);
|
|
putpad(clr_eol);
|
|
}
|
|
}
|