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1419 jermar 1
/*  $OpenBSD: screen.c,v 1.13 2006/04/20 03:25:36 ray Exp $ */
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/*  $NetBSD: screen.c,v 1.4 1995/04/29 01:11:36 mycroft Exp $   */
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/*-
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 * Copyright (c) 1992, 1993
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 *  The Regents of the University of California.  All rights reserved.
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 *
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 * This code is derived from software contributed to Berkeley by
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 * Chris Torek and Darren F. Provine.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 *
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 *  @(#)screen.c    8.1 (Berkeley) 5/31/93
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 */
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/*
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 * Tetris screen control.
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 */
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
1519 palkovsky 47
#include <io/stream.h>
1419 jermar 48
 
1524 palkovsky 49
 
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#include <async.h>
1419 jermar 51
#include "screen.h"
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#include "tetris.h"
1524 palkovsky 53
#include "../console/console.h"
1419 jermar 54
 
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static cell curscreen[B_SIZE];  /* 1 => standout (or otherwise marked) */
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static int curscore;
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static int isset;       /* true => terminal is in game mode */
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static struct termios oldtt;
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static void (*tstp)(int);
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static void scr_stop(int);
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static void stopset(int);
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1524 palkovsky 64
static char
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        *CEstr;         /* clear to end of line */
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1419 jermar 68
/*
1524 palkovsky 69
 * putstr() is for unpadded strings (either as in termcap(5) or
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 * simply literal strings);
1419 jermar 71
 */
1524 palkovsky 72
#define putstr(s)   puts(s)
1419 jermar 73
 
1524 palkovsky 74
static int con_phone;
1419 jermar 75
 
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77
 
1524 palkovsky 78
static void set_style(int fgcolor, int bgcolor)
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{
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    send_call_2(con_phone, CONSOLE_SET_STYLE, fgcolor, bgcolor);
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}
1419 jermar 82
 
1524 palkovsky 83
static void start_standout(void)
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{
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    set_style(0, 0xe0e0e0);
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}
1419 jermar 87
 
1524 palkovsky 88
static void resume_normal(void)
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{
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    set_style(0xe0e0e0, 0);
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}
1419 jermar 92
 
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/*
1524 palkovsky 94
 * Clear the screen, forgetting the current contents in the process.
1419 jermar 95
 */
1524 palkovsky 96
void
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scr_clear(void)
1419 jermar 98
{
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1524 palkovsky 100
    send_call(con_phone, CONSOLE_CLEAR, 0);
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    curscore = -1;
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    memset((char *)curscreen, 0, sizeof(curscreen));
1419 jermar 103
}
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/*
1524 palkovsky 106
 * Set up screen
1419 jermar 107
 */
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void
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scr_init(void)
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{
1519 palkovsky 111
    con_phone = get_fd_phone(1);
1524 palkovsky 112
    resume_normal();
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    scr_clear();
1419 jermar 114
}
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1524 palkovsky 116
static void moveto(int r, int c)
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{
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    send_call_2(con_phone, CONSOLE_GOTO, r, c);
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}
1419 jermar 120
 
1524 palkovsky 121
static void fflush(void)
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{
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    send_call(con_phone, CONSOLE_FLUSH, 0);
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}
125
 
126
struct winsize {
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    ipcarg_t ws_row;
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    ipcarg_t ws_col;
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};
130
 
131
static int get_display_size(struct winsize *ws)
132
{
133
    return sync_send_2(con_phone, CONSOLE_GETSIZE, 0, 0, &ws->ws_row, &ws->ws_col);
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}
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1419 jermar 136
static void
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scr_stop(int sig)
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{
139
 
140
    scr_end();
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    scr_set();
142
    scr_msg(key_msg, 1);
143
}
144
 
145
/*
146
 * Set up screen mode.
147
 */
148
void
149
scr_set(void)
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{
151
    struct winsize ws;
152
 
153
    Rows = 0, Cols = 0;
1524 palkovsky 154
    if (get_display_size(&ws) == 0) {
1419 jermar 155
        Rows = ws.ws_row;
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        Cols = ws.ws_col;
157
    }
158
    if (Rows < MINROWS || Cols < MINCOLS) {
159
        char smallscr[55];
160
 
161
        (void)snprintf(smallscr, sizeof(smallscr),
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            "the screen is too small (must be at least %dx%d)",
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            MINROWS, MINCOLS);
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        stop(smallscr);
165
    }
166
    isset = 1;
1519 palkovsky 167
 
1419 jermar 168
    scr_clear();
169
}
170
 
171
/*
172
 * End screen mode.
173
 */
174
void
175
scr_end(void)
176
{
177
}
178
 
179
void
180
stop(char *why)
181
{
182
 
183
    if (isset)
184
        scr_end();
185
    errx(1, "aborting: %s", why);
186
}
187
 
188
 
189
#if vax && !__GNUC__
190
typedef int regcell;    /* pcc is bad at `register char', etc */
191
#else
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typedef cell regcell;
193
#endif
194
 
195
/*
196
 * Update the screen.
197
 */
198
void
199
scr_update(void)
200
{
201
    cell *bp, *sp;
202
    regcell so, cur_so = 0;
203
    int i, ccol, j;
204
    static const struct shape *lastshape;
205
 
206
    /* always leave cursor after last displayed point */
207
    curscreen[D_LAST * B_COLS - 1] = -1;
208
 
209
    if (score != curscore) {
1524 palkovsky 210
        moveto(0, 0);
1419 jermar 211
        (void) printf("Score: %d", score);
212
        curscore = score;
213
    }
214
 
215
    /* draw preview of next pattern */
216
    if (showpreview && (nextshape != lastshape)) {
217
        int i;
218
        static int r=5, c=2;
219
        int tr, tc, t;
220
 
221
        lastshape = nextshape;
222
 
223
        /* clean */
1524 palkovsky 224
        resume_normal();
1419 jermar 225
        moveto(r-1, c-1); putstr("          ");
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        moveto(r,   c-1); putstr("          ");
227
        moveto(r+1, c-1); putstr("          ");
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        moveto(r+2, c-1); putstr("          ");
229
 
230
        moveto(r-3, c-2);
231
        putstr("Next shape:");
232
 
233
        /* draw */
1524 palkovsky 234
        start_standout();
1419 jermar 235
        moveto(r, 2 * c);
1524 palkovsky 236
        putstr("  ");
1419 jermar 237
        for (i = 0; i < 3; i++) {
238
            t = c + r * B_COLS;
239
            t += nextshape->off[i];
240
 
241
            tr = t / B_COLS;
242
            tc = t % B_COLS;
243
 
244
            moveto(tr, 2*tc);
1524 palkovsky 245
            putstr("  ");
1419 jermar 246
        }
1524 palkovsky 247
        resume_normal();
1419 jermar 248
    }
249
 
250
    bp = &board[D_FIRST * B_COLS];
251
    sp = &curscreen[D_FIRST * B_COLS];
252
    for (j = D_FIRST; j < D_LAST; j++) {
253
        ccol = -1;
254
        for (i = 0; i < B_COLS; bp++, sp++, i++) {
255
            if (*sp == (so = *bp))
256
                continue;
257
            *sp = so;
258
            if (i != ccol) {
259
                moveto(RTOD(j), CTOD(i));
260
            }
1524 palkovsky 261
            if (so != cur_so) {
262
                if (so)
263
                    start_standout();
264
                else
265
                    resume_normal();
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                cur_so = so;
267
            }
268
            putstr("  ");
1419 jermar 269
            ccol = i + 1;
270
            /*
271
             * Look ahead a bit, to avoid extra motion if
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             * we will be redrawing the cell after the next.
273
             * Motion probably takes four or more characters,
274
             * so we save even if we rewrite two cells
275
             * `unnecessarily'.  Skip it all, though, if
276
             * the next cell is a different color.
277
             */
278
#define STOP (B_COLS - 3)
279
            if (i > STOP || sp[1] != bp[1] || so != bp[1])
280
                continue;
281
            if (sp[2] != bp[2])
282
                sp[1] = -1;
283
            else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {
284
                sp[2] = -1;
285
                sp[1] = -1;
286
            }
287
        }
288
    }
1524 palkovsky 289
    resume_normal();
290
 
291
    fflush();
1419 jermar 292
}
293
 
294
/*
295
 * Write a message (set!=0), or clear the same message (set==0).
296
 * (We need its length in case we have to overwrite with blanks.)
297
 */
298
void
299
scr_msg(char *s, int set)
300
{
301
 
302
    if (set || CEstr == NULL) {
303
        int l = strlen(s);
304
 
305
        moveto(Rows - 2, ((Cols - l) >> 1) - 1);
306
        if (set)
307
            putstr(s);
308
        else
309
            while (--l >= 0)
310
                (void) putchar(' ');
311
    } else {
312
        moveto(Rows - 2, 0);
313
        putpad(CEstr);
314
    }
315
}