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1419 jermar 1
/*  $OpenBSD: screen.c,v 1.13 2006/04/20 03:25:36 ray Exp $ */
2
/*  $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.
7
 *
8
 * This code is derived from software contributed to Berkeley by
9
 * Chris Torek and Darren F. Provine.
10
 *
11
 * Redistribution and use in source and binary forms, with or without
12
 * modification, are permitted provided that the following conditions
13
 * are met:
14
 * 1. Redistributions of source code must retain the above copyright
15
 *    notice, this list of conditions and the following disclaimer.
16
 * 2. Redistributions in binary form must reproduce the above copyright
17
 *    notice, this list of conditions and the following disclaimer in the
18
 *    documentation and/or other materials provided with the distribution.
19
 * 3. Neither the name of the University nor the names of its contributors
20
 *    may be used to endorse or promote products derived from this software
21
 *    without specific prior written permission.
22
 *
23
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33
 * SUCH DAMAGE.
34
 *
35
 *  @(#)screen.c    8.1 (Berkeley) 5/31/93
36
 */
37
 
1653 cejka 38
/** @addtogroup tetris
4515 decky 39
 * @{
1653 cejka 40
 */
41
/** @file
42
 */
43
 
1419 jermar 44
/*
45
 * Tetris screen control.
46
 */
47
 
48
#include <err.h>
49
#include <stdio.h>
50
#include <stdlib.h>
51
#include <string.h>
52
#include <unistd.h>
4488 decky 53
#include <vfs/vfs.h>
1524 palkovsky 54
#include <async.h>
1419 jermar 55
#include "screen.h"
56
#include "tetris.h"
4488 decky 57
#include <io/console.h>
1419 jermar 58
 
4515 decky 59
#define STOP  (B_COLS - 3)
60
 
61
static cell curscreen[B_SIZE];  /* non-zero => standout (or otherwise marked) */
1419 jermar 62
static int curscore;
4515 decky 63
static int isset;               /* true => terminal is in game mode */
1419 jermar 64
 
4515 decky 65
static const struct shape *lastshape;
1419 jermar 66
 
4515 decky 67
 
1419 jermar 68
/*
1524 palkovsky 69
 * putstr() is for unpadded strings (either as in termcap(5) or
4488 decky 70
 * simply literal strings);
1419 jermar 71
 */
1533 palkovsky 72
static inline void putstr(char *s)
73
{
74
    while (*s)
75
        putchar(*(s++));
76
}
1419 jermar 77
 
4515 decky 78
static void start_standout(uint32_t color)
1524 palkovsky 79
{
4541 svoboda 80
    fflush(stdout);
4515 decky 81
    console_set_rgb_color(fphone(stdout), 0xf0f0f0, color);
1524 palkovsky 82
}
1419 jermar 83
 
1524 palkovsky 84
static void resume_normal(void)
85
{
4541 svoboda 86
    fflush(stdout);
4488 decky 87
    console_set_rgb_color(fphone(stdout), 0, 0xf0f0f0);
1524 palkovsky 88
}
1419 jermar 89
 
1590 cejka 90
void clear_screen(void)
91
{
4488 decky 92
    console_clear(fphone(stdout));
2621 jermar 93
    moveto(0, 0);
1590 cejka 94
}
95
 
1419 jermar 96
/*
1524 palkovsky 97
 * Clear the screen, forgetting the current contents in the process.
1419 jermar 98
 */
4515 decky 99
void scr_clear(void)
1419 jermar 100
{
1528 palkovsky 101
    resume_normal();
4488 decky 102
    console_clear(fphone(stdout));
1524 palkovsky 103
    curscore = -1;
4515 decky 104
    memset(curscreen, 0, sizeof(curscreen));
1419 jermar 105
}
106
 
107
/*
1524 palkovsky 108
 * Set up screen
1419 jermar 109
 */
4515 decky 110
void scr_init(void)
1419 jermar 111
{
4488 decky 112
    console_cursor_visibility(fphone(stdout), 0);
1524 palkovsky 113
    resume_normal();
114
    scr_clear();
1419 jermar 115
}
116
 
1590 cejka 117
void moveto(int r, int c)
1524 palkovsky 118
{
4541 svoboda 119
    fflush(stdout);
4488 decky 120
    console_goto(fphone(stdout), c, r);
1524 palkovsky 121
}
1419 jermar 122
 
1590 cejka 123
winsize_t winsize;
1524 palkovsky 124
 
1590 cejka 125
static int get_display_size(winsize_t *ws)
1524 palkovsky 126
{
4488 decky 127
    return console_get_size(fphone(stdout), &ws->ws_col, &ws->ws_row);
1524 palkovsky 128
}
129
 
1419 jermar 130
/*
131
 * Set up screen mode.
132
 */
4515 decky 133
void scr_set(void)
1419 jermar 134
{
1590 cejka 135
    winsize_t ws;
4515 decky 136
 
137
    Rows = 0;
138
    Cols = 0;
139
 
1524 palkovsky 140
    if (get_display_size(&ws) == 0) {
1419 jermar 141
        Rows = ws.ws_row;
142
        Cols = ws.ws_col;
143
    }
4515 decky 144
 
145
    if ((Rows < MINROWS) || (Cols < MINCOLS)) {
1419 jermar 146
        char smallscr[55];
4515 decky 147
 
1532 palkovsky 148
        snprintf(smallscr, sizeof(smallscr),
1419 jermar 149
            "the screen is too small (must be at least %dx%d)",
150
            MINROWS, MINCOLS);
151
        stop(smallscr);
152
    }
153
    isset = 1;
4515 decky 154
 
1419 jermar 155
    scr_clear();
156
}
157
 
158
/*
159
 * End screen mode.
160
 */
4515 decky 161
void scr_end(void)
1419 jermar 162
{
4515 decky 163
    console_cursor_visibility(fphone(stdout), 1);
1419 jermar 164
}
165
 
4515 decky 166
void stop(char *why)
1419 jermar 167
{
168
    if (isset)
169
        scr_end();
4515 decky 170
 
1419 jermar 171
    errx(1, "aborting: %s", why);
172
}
173
 
174
/*
175
 * Update the screen.
176
 */
4515 decky 177
void scr_update(void)
1419 jermar 178
{
4515 decky 179
    cell *bp;
180
    cell *sp;
181
    cell so;
182
    cell cur_so = 0;
183
    int i;
184
    int j;
185
    int ccol;
186
 
187
    /* Always leave cursor after last displayed point */
1419 jermar 188
    curscreen[D_LAST * B_COLS - 1] = -1;
4515 decky 189
 
1419 jermar 190
    if (score != curscore) {
1524 palkovsky 191
        moveto(0, 0);
1532 palkovsky 192
        printf("Score: %d", score);
1419 jermar 193
        curscore = score;
194
    }
4515 decky 195
 
196
    /* Draw preview of next pattern */
197
    if ((showpreview) && (nextshape != lastshape)) {
1419 jermar 198
        int i;
4515 decky 199
        static int r = 5, c = 2;
1419 jermar 200
        int tr, tc, t;
4515 decky 201
 
1419 jermar 202
        lastshape = nextshape;
4515 decky 203
 
204
        /* Clean */
1524 palkovsky 205
        resume_normal();
4515 decky 206
        moveto(r - 1, c - 1);
207
        putstr("          ");
208
        moveto(r, c - 1);
209
        putstr("          ");
210
        moveto(r + 1, c - 1);
211
        putstr("          ");
212
        moveto(r + 2, c - 1);
213
        putstr("          ");
214
 
215
        moveto(r - 3, c - 2);
1419 jermar 216
        putstr("Next shape:");
4515 decky 217
 
218
        /* Draw */
219
        start_standout(nextshape->color);
1419 jermar 220
        moveto(r, 2 * c);
1524 palkovsky 221
        putstr("  ");
1419 jermar 222
        for (i = 0; i < 3; i++) {
223
            t = c + r * B_COLS;
224
            t += nextshape->off[i];
4515 decky 225
 
1419 jermar 226
            tr = t / B_COLS;
227
            tc = t % B_COLS;
4515 decky 228
 
1419 jermar 229
            moveto(tr, 2*tc);
1524 palkovsky 230
            putstr("  ");
1419 jermar 231
        }
1524 palkovsky 232
        resume_normal();
1419 jermar 233
    }
4515 decky 234
 
1419 jermar 235
    bp = &board[D_FIRST * B_COLS];
236
    sp = &curscreen[D_FIRST * B_COLS];
237
    for (j = D_FIRST; j < D_LAST; j++) {
238
        ccol = -1;
239
        for (i = 0; i < B_COLS; bp++, sp++, i++) {
240
            if (*sp == (so = *bp))
241
                continue;
4515 decky 242
 
1419 jermar 243
            *sp = so;
244
            if (i != ccol) {
1532 palkovsky 245
                if (cur_so) {
246
                    resume_normal();
247
                    cur_so = 0;
248
                }
1419 jermar 249
                moveto(RTOD(j), CTOD(i));
250
            }
4515 decky 251
 
1524 palkovsky 252
            if (so != cur_so) {
253
                if (so)
4515 decky 254
                    start_standout(so);
1524 palkovsky 255
                else
256
                    resume_normal();
257
                cur_so = so;
258
            }
259
            putstr("  ");
4515 decky 260
 
1419 jermar 261
            ccol = i + 1;
262
            /*
263
             * Look ahead a bit, to avoid extra motion if
264
             * we will be redrawing the cell after the next.
265
             * Motion probably takes four or more characters,
266
             * so we save even if we rewrite two cells
267
             * `unnecessarily'.  Skip it all, though, if
268
             * the next cell is a different color.
269
             */
4515 decky 270
 
271
            if ((i > STOP) || (sp[1] != bp[1]) || (so != bp[1]))
1419 jermar 272
                continue;
4515 decky 273
 
1419 jermar 274
            if (sp[2] != bp[2])
275
                sp[1] = -1;
4515 decky 276
            else if ((i < STOP) && (so == bp[2]) && (sp[3] != bp[3])) {
1419 jermar 277
                sp[2] = -1;
278
                sp[1] = -1;
279
            }
280
        }
281
    }
4515 decky 282
 
1532 palkovsky 283
    if (cur_so)
284
        resume_normal();
4515 decky 285
 
286
    fflush(stdout);
1419 jermar 287
}
288
 
289
/*
4515 decky 290
 * Write a message (set != 0), or clear the same message (set == 0).
1419 jermar 291
 * (We need its length in case we have to overwrite with blanks.)
292
 */
4515 decky 293
void scr_msg(char *s, int set)
1419 jermar 294
{
4264 svoboda 295
    int l = str_size(s);
1528 palkovsky 296
 
297
    moveto(Rows - 2, ((Cols - l) >> 1) - 1);
4515 decky 298
 
1528 palkovsky 299
    if (set)
300
        putstr(s);
301
    else
302
        while (--l >= 0)
303
            (void) putchar(' ');
1419 jermar 304
}
1653 cejka 305
 
306
/** @}
307
 */