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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 $   */
3
 
4
/*-
5
 * Copyright (c) 1992, 1993
6
 *  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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48
#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"
3747 svoboda 59
#include <ipc/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
 
66
/*
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++));
74
}
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)
81
{
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)
86
{
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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{
2621 jermar 98
    async_msg_0(con_phone, CONSOLE_CLEAR);
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    moveto(0, 0);
1590 cejka 100
}
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();
2621 jermar 110
    async_msg_0(con_phone, CONSOLE_CLEAR);
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
{
2670 jermar 121
    con_phone = get_cons_phone();
2621 jermar 122
    async_msg_1(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
{
2621 jermar 134
    async_msg_0(con_phone, CONSOLE_FLUSH);
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
{
2621 jermar 141
    return async_req_0_2(con_phone, CONSOLE_GETSIZE, &ws->ws_row,
142
        &ws->ws_col);
1524 palkovsky 143
}
144
 
1419 jermar 145
/*
146
 * Set up screen mode.
147
 */
148
void
149
scr_set(void)
150
{
1590 cejka 151
    winsize_t ws;
1419 jermar 152
 
153
    Rows = 0, Cols = 0;
1524 palkovsky 154
    if (get_display_size(&ws) == 0) {
1419 jermar 155
        Rows = ws.ws_row;
156
        Cols = ws.ws_col;
157
    }
158
    if (Rows < MINROWS || Cols < MINCOLS) {
159
        char smallscr[55];
160
 
1532 palkovsky 161
        snprintf(smallscr, sizeof(smallscr),
1419 jermar 162
            "the screen is too small (must be at least %dx%d)",
163
            MINROWS, MINCOLS);
164
        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
/*
190
 * Update the screen.
191
 */
192
void
193
scr_update(void)
194
{
195
    cell *bp, *sp;
1528 palkovsky 196
    cell so, cur_so = 0;
1419 jermar 197
    int i, ccol, j;
198
    static const struct shape *lastshape;
199
 
200
    /* always leave cursor after last displayed point */
201
    curscreen[D_LAST * B_COLS - 1] = -1;
202
 
203
    if (score != curscore) {
1524 palkovsky 204
        moveto(0, 0);
1532 palkovsky 205
        printf("Score: %d", score);
1419 jermar 206
        curscore = score;
207
    }
208
 
209
    /* draw preview of next pattern */
210
    if (showpreview && (nextshape != lastshape)) {
211
        int i;
212
        static int r=5, c=2;
213
        int tr, tc, t;
214
 
215
        lastshape = nextshape;
216
 
217
        /* clean */
1524 palkovsky 218
        resume_normal();
1419 jermar 219
        moveto(r-1, c-1); putstr("          ");
220
        moveto(r,   c-1); putstr("          ");
221
        moveto(r+1, c-1); putstr("          ");
222
        moveto(r+2, c-1); putstr("          ");
223
 
224
        moveto(r-3, c-2);
225
        putstr("Next shape:");
226
 
227
        /* draw */
1524 palkovsky 228
        start_standout();
1419 jermar 229
        moveto(r, 2 * c);
1524 palkovsky 230
        putstr("  ");
1419 jermar 231
        for (i = 0; i < 3; i++) {
232
            t = c + r * B_COLS;
233
            t += nextshape->off[i];
234
 
235
            tr = t / B_COLS;
236
            tc = t % B_COLS;
237
 
238
            moveto(tr, 2*tc);
1524 palkovsky 239
            putstr("  ");
1419 jermar 240
        }
1524 palkovsky 241
        resume_normal();
1419 jermar 242
    }
243
 
244
    bp = &board[D_FIRST * B_COLS];
245
    sp = &curscreen[D_FIRST * B_COLS];
246
    for (j = D_FIRST; j < D_LAST; j++) {
247
        ccol = -1;
248
        for (i = 0; i < B_COLS; bp++, sp++, i++) {
249
            if (*sp == (so = *bp))
250
                continue;
251
            *sp = so;
252
            if (i != ccol) {
1532 palkovsky 253
                if (cur_so) {
254
                    resume_normal();
255
                    cur_so = 0;
256
                }
1419 jermar 257
                moveto(RTOD(j), CTOD(i));
258
            }
1524 palkovsky 259
            if (so != cur_so) {
260
                if (so)
261
                    start_standout();
262
                else
263
                    resume_normal();
264
                cur_so = so;
265
            }
266
            putstr("  ");
1532 palkovsky 267
 
1419 jermar 268
            ccol = i + 1;
269
            /*
270
             * Look ahead a bit, to avoid extra motion if
271
             * we will be redrawing the cell after the next.
272
             * Motion probably takes four or more characters,
273
             * so we save even if we rewrite two cells
274
             * `unnecessarily'.  Skip it all, though, if
275
             * the next cell is a different color.
276
             */
277
#define STOP (B_COLS - 3)
278
            if (i > STOP || sp[1] != bp[1] || so != bp[1])
279
                continue;
280
            if (sp[2] != bp[2])
281
                sp[1] = -1;
282
            else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {
283
                sp[2] = -1;
284
                sp[1] = -1;
285
            }
286
        }
287
    }
1532 palkovsky 288
    if (cur_so)
289
        resume_normal();
1524 palkovsky 290
    fflush();
1419 jermar 291
}
292
 
293
/*
294
 * Write a message (set!=0), or clear the same message (set==0).
295
 * (We need its length in case we have to overwrite with blanks.)
296
 */
297
void
298
scr_msg(char *s, int set)
299
{
300
 
1528 palkovsky 301
    int l = strlen(s);
302
 
303
    moveto(Rows - 2, ((Cols - l) >> 1) - 1);
304
    if (set)
305
        putstr(s);
306
    else
307
        while (--l >= 0)
308
            (void) putchar(' ');
1419 jermar 309
}
1653 cejka 310
 
311
/** @}
312
 */
313