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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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4
/*-
5
 * 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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1653 cejka 38
/** @addtogroup tetris
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 * @{
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 */
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/** @file
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 */
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1419 jermar 44
/*
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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 53
#include <io/stream.h>
1419 jermar 54
 
1524 palkovsky 55
 
56
#include <async.h>
1419 jermar 57
#include "screen.h"
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#include "tetris.h"
1524 palkovsky 59
#include "../console/console.h"
1419 jermar 60
 
61
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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65
 
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/*
1524 palkovsky 67
 * putstr() is for unpadded strings (either as in termcap(5) or
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 * simply literal strings);
1419 jermar 69
 */
1533 palkovsky 70
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 75
 
1524 palkovsky 76
static int con_phone;
1419 jermar 77
 
78
 
79
 
1524 palkovsky 80
static void set_style(int fgcolor, int bgcolor)
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{
1610 palkovsky 82
    async_msg_2(con_phone, CONSOLE_SET_STYLE, fgcolor, bgcolor);
1524 palkovsky 83
}
1419 jermar 84
 
1524 palkovsky 85
static void start_standout(void)
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{
1631 palkovsky 87
    set_style(0xf0f0f0, 0);
1524 palkovsky 88
}
1419 jermar 89
 
1524 palkovsky 90
static void resume_normal(void)
91
{
1631 palkovsky 92
    set_style(0, 0xf0f0f0);
1524 palkovsky 93
}
1419 jermar 94
 
1590 cejka 95
 
96
void clear_screen(void)
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{
1610 palkovsky 98
    async_msg(con_phone, CONSOLE_CLEAR, 0);
1590 cejka 99
    moveto(0,0);
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}
101
 
1419 jermar 102
/*
1524 palkovsky 103
 * Clear the screen, forgetting the current contents in the process.
1419 jermar 104
 */
1524 palkovsky 105
void
106
scr_clear(void)
1419 jermar 107
{
108
 
1528 palkovsky 109
    resume_normal();
1610 palkovsky 110
    async_msg(con_phone, CONSOLE_CLEAR, 0);
1524 palkovsky 111
    curscore = -1;
112
    memset((char *)curscreen, 0, sizeof(curscreen));
1419 jermar 113
}
114
 
115
/*
1524 palkovsky 116
 * Set up screen
1419 jermar 117
 */
118
void
119
scr_init(void)
120
{
1519 palkovsky 121
    con_phone = get_fd_phone(1);
1610 palkovsky 122
    async_msg(con_phone, CONSOLE_CURSOR_VISIBILITY, 0);
1524 palkovsky 123
    resume_normal();
124
    scr_clear();
1419 jermar 125
}
126
 
1590 cejka 127
void moveto(int r, int c)
1524 palkovsky 128
{
1610 palkovsky 129
    async_msg_2(con_phone, CONSOLE_GOTO, r, c);
1524 palkovsky 130
}
1419 jermar 131
 
1524 palkovsky 132
static void fflush(void)
133
{
1610 palkovsky 134
    async_msg(con_phone, CONSOLE_FLUSH, 0);
1524 palkovsky 135
}
136
 
1590 cejka 137
winsize_t winsize;
1524 palkovsky 138
 
1590 cejka 139
static int get_display_size(winsize_t *ws)
1524 palkovsky 140
{
1610 palkovsky 141
    return async_req_2(con_phone, CONSOLE_GETSIZE, 0, 0, &ws->ws_row, &ws->ws_col);
1524 palkovsky 142
}
143
 
1419 jermar 144
/*
145
 * Set up screen mode.
146
 */
147
void
148
scr_set(void)
149
{
1590 cejka 150
    winsize_t ws;
1419 jermar 151
 
152
    Rows = 0, Cols = 0;
1524 palkovsky 153
    if (get_display_size(&ws) == 0) {
1419 jermar 154
        Rows = ws.ws_row;
155
        Cols = ws.ws_col;
156
    }
157
    if (Rows < MINROWS || Cols < MINCOLS) {
158
        char smallscr[55];
159
 
1532 palkovsky 160
        snprintf(smallscr, sizeof(smallscr),
1419 jermar 161
            "the screen is too small (must be at least %dx%d)",
162
            MINROWS, MINCOLS);
163
        stop(smallscr);
164
    }
165
    isset = 1;
1519 palkovsky 166
 
1419 jermar 167
    scr_clear();
168
}
169
 
170
/*
171
 * End screen mode.
172
 */
173
void
174
scr_end(void)
175
{
176
}
177
 
178
void
179
stop(char *why)
180
{
181
 
182
    if (isset)
183
        scr_end();
184
    errx(1, "aborting: %s", why);
185
}
186
 
187
 
188
/*
189
 * Update the screen.
190
 */
191
void
192
scr_update(void)
193
{
194
    cell *bp, *sp;
1528 palkovsky 195
    cell so, cur_so = 0;
1419 jermar 196
    int i, ccol, j;
197
    static const struct shape *lastshape;
198
 
199
    /* always leave cursor after last displayed point */
200
    curscreen[D_LAST * B_COLS - 1] = -1;
201
 
202
    if (score != curscore) {
1524 palkovsky 203
        moveto(0, 0);
1532 palkovsky 204
        printf("Score: %d", score);
1419 jermar 205
        curscore = score;
206
    }
207
 
208
    /* draw preview of next pattern */
209
    if (showpreview && (nextshape != lastshape)) {
210
        int i;
211
        static int r=5, c=2;
212
        int tr, tc, t;
213
 
214
        lastshape = nextshape;
215
 
216
        /* clean */
1524 palkovsky 217
        resume_normal();
1419 jermar 218
        moveto(r-1, c-1); putstr("          ");
219
        moveto(r,   c-1); putstr("          ");
220
        moveto(r+1, c-1); putstr("          ");
221
        moveto(r+2, c-1); putstr("          ");
222
 
223
        moveto(r-3, c-2);
224
        putstr("Next shape:");
225
 
226
        /* draw */
1524 palkovsky 227
        start_standout();
1419 jermar 228
        moveto(r, 2 * c);
1524 palkovsky 229
        putstr("  ");
1419 jermar 230
        for (i = 0; i < 3; i++) {
231
            t = c + r * B_COLS;
232
            t += nextshape->off[i];
233
 
234
            tr = t / B_COLS;
235
            tc = t % B_COLS;
236
 
237
            moveto(tr, 2*tc);
1524 palkovsky 238
            putstr("  ");
1419 jermar 239
        }
1524 palkovsky 240
        resume_normal();
1419 jermar 241
    }
242
 
243
    bp = &board[D_FIRST * B_COLS];
244
    sp = &curscreen[D_FIRST * B_COLS];
245
    for (j = D_FIRST; j < D_LAST; j++) {
246
        ccol = -1;
247
        for (i = 0; i < B_COLS; bp++, sp++, i++) {
248
            if (*sp == (so = *bp))
249
                continue;
250
            *sp = so;
251
            if (i != ccol) {
1532 palkovsky 252
                if (cur_so) {
253
                    resume_normal();
254
                    cur_so = 0;
255
                }
1419 jermar 256
                moveto(RTOD(j), CTOD(i));
257
            }
1524 palkovsky 258
            if (so != cur_so) {
259
                if (so)
260
                    start_standout();
261
                else
262
                    resume_normal();
263
                cur_so = so;
264
            }
265
            putstr("  ");
1532 palkovsky 266
 
1419 jermar 267
            ccol = i + 1;
268
            /*
269
             * Look ahead a bit, to avoid extra motion if
270
             * we will be redrawing the cell after the next.
271
             * Motion probably takes four or more characters,
272
             * so we save even if we rewrite two cells
273
             * `unnecessarily'.  Skip it all, though, if
274
             * the next cell is a different color.
275
             */
276
#define STOP (B_COLS - 3)
277
            if (i > STOP || sp[1] != bp[1] || so != bp[1])
278
                continue;
279
            if (sp[2] != bp[2])
280
                sp[1] = -1;
281
            else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {
282
                sp[2] = -1;
283
                sp[1] = -1;
284
            }
285
        }
286
    }
1532 palkovsky 287
    if (cur_so)
288
        resume_normal();
1524 palkovsky 289
    fflush();
1419 jermar 290
}
291
 
292
/*
293
 * Write a message (set!=0), or clear the same message (set==0).
294
 * (We need its length in case we have to overwrite with blanks.)
295
 */
296
void
297
scr_msg(char *s, int set)
298
{
299
 
1528 palkovsky 300
    int l = strlen(s);
301
 
302
    moveto(Rows - 2, ((Cols - l) >> 1) - 1);
303
    if (set)
304
        putstr(s);
305
    else
306
        while (--l >= 0)
307
            (void) putchar(' ');
1419 jermar 308
}
1653 cejka 309
 
310
/** @}
311
 */
312