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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
4691 svoboda 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>
4691 svoboda 53
#include <vfs/vfs.h>
1524 palkovsky 54
#include <async.h>
1419 jermar 55
#include "screen.h"
56
#include "tetris.h"
4691 svoboda 57
#include <io/console.h>
1419 jermar 58
 
4691 svoboda 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;
4691 svoboda 63
static int isset;               /* true => terminal is in game mode */
1419 jermar 64
 
4691 svoboda 65
static int use_color;       /* true => use colors */
1419 jermar 66
 
4691 svoboda 67
static const struct shape *lastshape;
68
 
69
 
1419 jermar 70
/*
1524 palkovsky 71
 * putstr() is for unpadded strings (either as in termcap(5) or
4691 svoboda 72
 * simply literal strings);
1419 jermar 73
 */
1533 palkovsky 74
static inline void putstr(char *s)
75
{
76
    while (*s)
77
        putchar(*(s++));
78
}
1419 jermar 79
 
4691 svoboda 80
static void start_standout(uint32_t color)
1524 palkovsky 81
{
4691 svoboda 82
    fflush(stdout);
83
    console_set_rgb_color(fphone(stdout), 0xf0f0f0,
84
        use_color ? color : 0x000000);
1524 palkovsky 85
}
1419 jermar 86
 
1524 palkovsky 87
static void resume_normal(void)
88
{
4691 svoboda 89
    fflush(stdout);
90
    console_set_rgb_color(fphone(stdout), 0, 0xf0f0f0);
1524 palkovsky 91
}
1419 jermar 92
 
1590 cejka 93
void clear_screen(void)
94
{
4691 svoboda 95
    console_clear(fphone(stdout));
2621 jermar 96
    moveto(0, 0);
1590 cejka 97
}
98
 
1419 jermar 99
/*
1524 palkovsky 100
 * Clear the screen, forgetting the current contents in the process.
1419 jermar 101
 */
4691 svoboda 102
void scr_clear(void)
1419 jermar 103
{
1528 palkovsky 104
    resume_normal();
4691 svoboda 105
    console_clear(fphone(stdout));
1524 palkovsky 106
    curscore = -1;
4691 svoboda 107
    memset(curscreen, 0, sizeof(curscreen));
1419 jermar 108
}
109
 
110
/*
1524 palkovsky 111
 * Set up screen
1419 jermar 112
 */
4691 svoboda 113
void scr_init(void)
1419 jermar 114
{
4691 svoboda 115
    console_cursor_visibility(fphone(stdout), 0);
1524 palkovsky 116
    resume_normal();
117
    scr_clear();
1419 jermar 118
}
119
 
1590 cejka 120
void moveto(int r, int c)
1524 palkovsky 121
{
4691 svoboda 122
    fflush(stdout);
123
    console_goto(fphone(stdout), c, r);
1524 palkovsky 124
}
1419 jermar 125
 
1590 cejka 126
winsize_t winsize;
1524 palkovsky 127
 
1590 cejka 128
static int get_display_size(winsize_t *ws)
1524 palkovsky 129
{
4691 svoboda 130
    return console_get_size(fphone(stdout), &ws->ws_col, &ws->ws_row);
1524 palkovsky 131
}
132
 
4691 svoboda 133
static int get_display_color_sup(void)
134
{
135
    int rc;
136
    int ccap;
137
 
138
    rc = console_get_color_cap(fphone(stdout), &ccap);
139
    if (rc != 0)
140
        return 0;
141
 
142
    return (ccap >= CONSOLE_CCAP_RGB);
143
}
144
 
1419 jermar 145
/*
146
 * Set up screen mode.
147
 */
4691 svoboda 148
void scr_set(void)
1419 jermar 149
{
1590 cejka 150
    winsize_t ws;
4691 svoboda 151
 
152
    Rows = 0;
153
    Cols = 0;
154
 
1524 palkovsky 155
    if (get_display_size(&ws) == 0) {
1419 jermar 156
        Rows = ws.ws_row;
157
        Cols = ws.ws_col;
158
    }
4691 svoboda 159
 
160
    use_color = get_display_color_sup();
161
 
162
    if ((Rows < MINROWS) || (Cols < MINCOLS)) {
1419 jermar 163
        char smallscr[55];
4691 svoboda 164
 
1532 palkovsky 165
        snprintf(smallscr, sizeof(smallscr),
1419 jermar 166
            "the screen is too small (must be at least %dx%d)",
167
            MINROWS, MINCOLS);
168
        stop(smallscr);
169
    }
170
    isset = 1;
4691 svoboda 171
 
1419 jermar 172
    scr_clear();
173
}
174
 
175
/*
176
 * End screen mode.
177
 */
4691 svoboda 178
void scr_end(void)
1419 jermar 179
{
4691 svoboda 180
    console_cursor_visibility(fphone(stdout), 1);
1419 jermar 181
}
182
 
4691 svoboda 183
void stop(char *why)
1419 jermar 184
{
185
    if (isset)
186
        scr_end();
4691 svoboda 187
 
1419 jermar 188
    errx(1, "aborting: %s", why);
189
}
190
 
191
/*
192
 * Update the screen.
193
 */
4691 svoboda 194
void scr_update(void)
1419 jermar 195
{
4691 svoboda 196
    cell *bp;
197
    cell *sp;
198
    cell so;
199
    cell cur_so = 0;
200
    int i;
201
    int j;
202
    int ccol;
203
 
204
    /* Always leave cursor after last displayed point */
1419 jermar 205
    curscreen[D_LAST * B_COLS - 1] = -1;
4691 svoboda 206
 
1419 jermar 207
    if (score != curscore) {
1524 palkovsky 208
        moveto(0, 0);
1532 palkovsky 209
        printf("Score: %d", score);
1419 jermar 210
        curscore = score;
211
    }
4691 svoboda 212
 
213
    /* Draw preview of next pattern */
214
    if ((showpreview) && (nextshape != lastshape)) {
1419 jermar 215
        int i;
4691 svoboda 216
        static int r = 5, c = 2;
1419 jermar 217
        int tr, tc, t;
4691 svoboda 218
 
1419 jermar 219
        lastshape = nextshape;
4691 svoboda 220
 
221
        /* Clean */
1524 palkovsky 222
        resume_normal();
4691 svoboda 223
        moveto(r - 1, c - 1);
224
        putstr("          ");
225
        moveto(r, c - 1);
226
        putstr("          ");
227
        moveto(r + 1, c - 1);
228
        putstr("          ");
229
        moveto(r + 2, c - 1);
230
        putstr("          ");
231
 
232
        moveto(r - 3, c - 2);
1419 jermar 233
        putstr("Next shape:");
4691 svoboda 234
 
235
        /* Draw */
236
        start_standout(nextshape->color);
1419 jermar 237
        moveto(r, 2 * c);
1524 palkovsky 238
        putstr("  ");
1419 jermar 239
        for (i = 0; i < 3; i++) {
240
            t = c + r * B_COLS;
241
            t += nextshape->off[i];
4691 svoboda 242
 
1419 jermar 243
            tr = t / B_COLS;
244
            tc = t % B_COLS;
4691 svoboda 245
 
1419 jermar 246
            moveto(tr, 2*tc);
1524 palkovsky 247
            putstr("  ");
1419 jermar 248
        }
1524 palkovsky 249
        resume_normal();
1419 jermar 250
    }
4691 svoboda 251
 
1419 jermar 252
    bp = &board[D_FIRST * B_COLS];
253
    sp = &curscreen[D_FIRST * B_COLS];
254
    for (j = D_FIRST; j < D_LAST; j++) {
255
        ccol = -1;
256
        for (i = 0; i < B_COLS; bp++, sp++, i++) {
257
            if (*sp == (so = *bp))
258
                continue;
4691 svoboda 259
 
1419 jermar 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
            }
4691 svoboda 268
 
1524 palkovsky 269
            if (so != cur_so) {
270
                if (so)
4691 svoboda 271
                    start_standout(so);
1524 palkovsky 272
                else
273
                    resume_normal();
274
                cur_so = so;
275
            }
276
            putstr("  ");
4691 svoboda 277
 
1419 jermar 278
            ccol = i + 1;
279
            /*
280
             * Look ahead a bit, to avoid extra motion if
281
             * we will be redrawing the cell after the next.
282
             * Motion probably takes four or more characters,
283
             * so we save even if we rewrite two cells
284
             * `unnecessarily'.  Skip it all, though, if
285
             * the next cell is a different color.
286
             */
4691 svoboda 287
 
288
            if ((i > STOP) || (sp[1] != bp[1]) || (so != bp[1]))
1419 jermar 289
                continue;
4691 svoboda 290
 
1419 jermar 291
            if (sp[2] != bp[2])
292
                sp[1] = -1;
4691 svoboda 293
            else if ((i < STOP) && (so == bp[2]) && (sp[3] != bp[3])) {
1419 jermar 294
                sp[2] = -1;
295
                sp[1] = -1;
296
            }
297
        }
298
    }
4691 svoboda 299
 
1532 palkovsky 300
    if (cur_so)
301
        resume_normal();
4691 svoboda 302
 
303
    fflush(stdout);
1419 jermar 304
}
305
 
306
/*
4691 svoboda 307
 * Write a message (set != 0), or clear the same message (set == 0).
1419 jermar 308
 * (We need its length in case we have to overwrite with blanks.)
309
 */
4691 svoboda 310
void scr_msg(char *s, int set)
1419 jermar 311
{
4348 svoboda 312
    int l = str_size(s);
1528 palkovsky 313
 
314
    moveto(Rows - 2, ((Cols - l) >> 1) - 1);
4691 svoboda 315
 
1528 palkovsky 316
    if (set)
317
        putstr(s);
318
    else
319
        while (--l >= 0)
320
            (void) putchar(' ');
1419 jermar 321
}
1653 cejka 322
 
323
/** @}
324
 */