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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 void (*tstp)(int);
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60
static void scr_stop(int);
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static void stopset(int);
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1524 palkovsky 63
static char
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        *CEstr;         /* clear to end of line */
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1419 jermar 67
/*
1524 palkovsky 68
 * putstr() is for unpadded strings (either as in termcap(5) or
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 * simply literal strings);
1419 jermar 70
 */
1533 palkovsky 71
static inline void putstr(char *s)
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{
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    while (*s)
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        putchar(*(s++));
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}
1419 jermar 76
 
1524 palkovsky 77
static int con_phone;
1419 jermar 78
 
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80
 
1524 palkovsky 81
static void set_style(int fgcolor, int bgcolor)
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{
1610 palkovsky 83
    async_msg_2(con_phone, CONSOLE_SET_STYLE, fgcolor, bgcolor);
1524 palkovsky 84
}
1419 jermar 85
 
1524 palkovsky 86
static void start_standout(void)
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{
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    set_style(0, 0xe0e0e0);
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}
1419 jermar 90
 
1524 palkovsky 91
static void resume_normal(void)
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{
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    set_style(0xe0e0e0, 0);
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}
1419 jermar 95
 
1590 cejka 96
 
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void clear_screen(void)
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{
1610 palkovsky 99
    async_msg(con_phone, CONSOLE_CLEAR, 0);
1590 cejka 100
    moveto(0,0);
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}
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1419 jermar 103
/*
1524 palkovsky 104
 * Clear the screen, forgetting the current contents in the process.
1419 jermar 105
 */
1524 palkovsky 106
void
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scr_clear(void)
1419 jermar 108
{
109
 
1528 palkovsky 110
    resume_normal();
1610 palkovsky 111
    async_msg(con_phone, CONSOLE_CLEAR, 0);
1524 palkovsky 112
    curscore = -1;
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    memset((char *)curscreen, 0, sizeof(curscreen));
1419 jermar 114
}
115
 
116
/*
1524 palkovsky 117
 * Set up screen
1419 jermar 118
 */
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void
120
scr_init(void)
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{
1519 palkovsky 122
    con_phone = get_fd_phone(1);
1610 palkovsky 123
    async_msg(con_phone, CONSOLE_CURSOR_VISIBILITY, 0);
1524 palkovsky 124
    resume_normal();
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    scr_clear();
1419 jermar 126
}
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1590 cejka 128
void moveto(int r, int c)
1524 palkovsky 129
{
1610 palkovsky 130
    async_msg_2(con_phone, CONSOLE_GOTO, r, c);
1524 palkovsky 131
}
1419 jermar 132
 
1524 palkovsky 133
static void fflush(void)
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{
1610 palkovsky 135
    async_msg(con_phone, CONSOLE_FLUSH, 0);
1524 palkovsky 136
}
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1590 cejka 138
winsize_t winsize;
1524 palkovsky 139
 
1590 cejka 140
static int get_display_size(winsize_t *ws)
1524 palkovsky 141
{
1610 palkovsky 142
    return async_req_2(con_phone, CONSOLE_GETSIZE, 0, 0, &ws->ws_row, &ws->ws_col);
1524 palkovsky 143
}
144
 
1419 jermar 145
static void
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scr_stop(int sig)
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{
148
 
149
    scr_end();
150
    scr_set();
151
    scr_msg(key_msg, 1);
152
}
153
 
154
/*
155
 * Set up screen mode.
156
 */
157
void
158
scr_set(void)
159
{
1590 cejka 160
    winsize_t ws;
1419 jermar 161
 
162
    Rows = 0, Cols = 0;
1524 palkovsky 163
    if (get_display_size(&ws) == 0) {
1419 jermar 164
        Rows = ws.ws_row;
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        Cols = ws.ws_col;
166
    }
167
    if (Rows < MINROWS || Cols < MINCOLS) {
168
        char smallscr[55];
169
 
1532 palkovsky 170
        snprintf(smallscr, sizeof(smallscr),
1419 jermar 171
            "the screen is too small (must be at least %dx%d)",
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            MINROWS, MINCOLS);
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        stop(smallscr);
174
    }
175
    isset = 1;
1519 palkovsky 176
 
1419 jermar 177
    scr_clear();
178
}
179
 
180
/*
181
 * End screen mode.
182
 */
183
void
184
scr_end(void)
185
{
186
}
187
 
188
void
189
stop(char *why)
190
{
191
 
192
    if (isset)
193
        scr_end();
194
    errx(1, "aborting: %s", why);
195
}
196
 
197
 
198
/*
199
 * Update the screen.
200
 */
201
void
202
scr_update(void)
203
{
204
    cell *bp, *sp;
1528 palkovsky 205
    cell so, cur_so = 0;
1419 jermar 206
    int i, ccol, j;
207
    static const struct shape *lastshape;
208
 
209
    /* always leave cursor after last displayed point */
210
    curscreen[D_LAST * B_COLS - 1] = -1;
211
 
212
    if (score != curscore) {
1524 palkovsky 213
        moveto(0, 0);
1532 palkovsky 214
        printf("Score: %d", score);
1419 jermar 215
        curscore = score;
216
    }
217
 
218
    /* draw preview of next pattern */
219
    if (showpreview && (nextshape != lastshape)) {
220
        int i;
221
        static int r=5, c=2;
222
        int tr, tc, t;
223
 
224
        lastshape = nextshape;
225
 
226
        /* clean */
1524 palkovsky 227
        resume_normal();
1419 jermar 228
        moveto(r-1, c-1); putstr("          ");
229
        moveto(r,   c-1); putstr("          ");
230
        moveto(r+1, c-1); putstr("          ");
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        moveto(r+2, c-1); putstr("          ");
232
 
233
        moveto(r-3, c-2);
234
        putstr("Next shape:");
235
 
236
        /* draw */
1524 palkovsky 237
        start_standout();
1419 jermar 238
        moveto(r, 2 * c);
1524 palkovsky 239
        putstr("  ");
1419 jermar 240
        for (i = 0; i < 3; i++) {
241
            t = c + r * B_COLS;
242
            t += nextshape->off[i];
243
 
244
            tr = t / B_COLS;
245
            tc = t % B_COLS;
246
 
247
            moveto(tr, 2*tc);
1524 palkovsky 248
            putstr("  ");
1419 jermar 249
        }
1524 palkovsky 250
        resume_normal();
1419 jermar 251
    }
252
 
253
    bp = &board[D_FIRST * B_COLS];
254
    sp = &curscreen[D_FIRST * B_COLS];
255
    for (j = D_FIRST; j < D_LAST; j++) {
256
        ccol = -1;
257
        for (i = 0; i < B_COLS; bp++, sp++, i++) {
258
            if (*sp == (so = *bp))
259
                continue;
260
            *sp = so;
261
            if (i != ccol) {
1532 palkovsky 262
                if (cur_so) {
263
                    resume_normal();
264
                    cur_so = 0;
265
                }
1419 jermar 266
                moveto(RTOD(j), CTOD(i));
267
            }
1524 palkovsky 268
            if (so != cur_so) {
269
                if (so)
270
                    start_standout();
271
                else
272
                    resume_normal();
273
                cur_so = so;
274
            }
275
            putstr("  ");
1532 palkovsky 276
 
1419 jermar 277
            ccol = i + 1;
278
            /*
279
             * Look ahead a bit, to avoid extra motion if
280
             * we will be redrawing the cell after the next.
281
             * Motion probably takes four or more characters,
282
             * so we save even if we rewrite two cells
283
             * `unnecessarily'.  Skip it all, though, if
284
             * the next cell is a different color.
285
             */
286
#define STOP (B_COLS - 3)
287
            if (i > STOP || sp[1] != bp[1] || so != bp[1])
288
                continue;
289
            if (sp[2] != bp[2])
290
                sp[1] = -1;
291
            else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {
292
                sp[2] = -1;
293
                sp[1] = -1;
294
            }
295
        }
296
    }
1532 palkovsky 297
    if (cur_so)
298
        resume_normal();
1524 palkovsky 299
    fflush();
1419 jermar 300
}
301
 
302
/*
303
 * Write a message (set!=0), or clear the same message (set==0).
304
 * (We need its length in case we have to overwrite with blanks.)
305
 */
306
void
307
scr_msg(char *s, int set)
308
{
309
 
1528 palkovsky 310
    int l = strlen(s);
311
 
312
    moveto(Rows - 2, ((Cols - l) >> 1) - 1);
313
    if (set)
314
        putstr(s);
315
    else
316
        while (--l >= 0)
317
            (void) putchar(' ');
1419 jermar 318
}