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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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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>
4055 trochtova 53
#include <console.h>
1419 jermar 54
 
1524 palkovsky 55
#include <async.h>
1419 jermar 56
#include "screen.h"
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#include "tetris.h"
4055 trochtova 58
#include <ipc/console.h>
1419 jermar 59
 
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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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64
 
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/*
1524 palkovsky 66
 * putstr() is for unpadded strings (either as in termcap(5) or
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 * simply literal strings);
1419 jermar 68
 */
1533 palkovsky 69
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 74
 
1524 palkovsky 75
static void start_standout(void)
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{
4055 trochtova 77
    console_set_rgb_color(0xf0f0f0, 0);
1524 palkovsky 78
}
1419 jermar 79
 
1524 palkovsky 80
static void resume_normal(void)
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{
4055 trochtova 82
    console_set_rgb_color(0, 0xf0f0f0);
1524 palkovsky 83
}
1419 jermar 84
 
1590 cejka 85
void clear_screen(void)
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{
4055 trochtova 87
    console_clear();
2621 jermar 88
    moveto(0, 0);
1590 cejka 89
}
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1419 jermar 91
/*
1524 palkovsky 92
 * Clear the screen, forgetting the current contents in the process.
1419 jermar 93
 */
1524 palkovsky 94
void
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scr_clear(void)
1419 jermar 96
{
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1528 palkovsky 98
    resume_normal();
4055 trochtova 99
    console_clear();
1524 palkovsky 100
    curscore = -1;
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    memset((char *)curscreen, 0, sizeof(curscreen));
1419 jermar 102
}
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104
/*
1524 palkovsky 105
 * Set up screen
1419 jermar 106
 */
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void
108
scr_init(void)
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{
4055 trochtova 110
    console_cursor_visibility(0);
1524 palkovsky 111
    resume_normal();
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    scr_clear();
1419 jermar 113
}
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1590 cejka 115
void moveto(int r, int c)
1524 palkovsky 116
{
4055 trochtova 117
    console_goto(r, c);
1524 palkovsky 118
}
1419 jermar 119
 
1590 cejka 120
winsize_t winsize;
1524 palkovsky 121
 
1590 cejka 122
static int get_display_size(winsize_t *ws)
1524 palkovsky 123
{
4055 trochtova 124
    return console_get_size(&ws->ws_row, &ws->ws_col);
1524 palkovsky 125
}
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1419 jermar 127
/*
128
 * Set up screen mode.
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 */
130
void
131
scr_set(void)
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{
1590 cejka 133
    winsize_t ws;
1419 jermar 134
 
135
    Rows = 0, Cols = 0;
1524 palkovsky 136
    if (get_display_size(&ws) == 0) {
1419 jermar 137
        Rows = ws.ws_row;
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        Cols = ws.ws_col;
139
    }
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    if (Rows < MINROWS || Cols < MINCOLS) {
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        char smallscr[55];
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1532 palkovsky 143
        snprintf(smallscr, sizeof(smallscr),
1419 jermar 144
            "the screen is too small (must be at least %dx%d)",
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            MINROWS, MINCOLS);
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        stop(smallscr);
147
    }
148
    isset = 1;
1519 palkovsky 149
 
1419 jermar 150
    scr_clear();
151
}
152
 
153
/*
154
 * End screen mode.
155
 */
156
void
157
scr_end(void)
158
{
159
}
160
 
161
void
162
stop(char *why)
163
{
164
 
165
    if (isset)
166
        scr_end();
167
    errx(1, "aborting: %s", why);
168
}
169
 
170
 
171
/*
172
 * Update the screen.
173
 */
174
void
175
scr_update(void)
176
{
177
    cell *bp, *sp;
1528 palkovsky 178
    cell so, cur_so = 0;
1419 jermar 179
    int i, ccol, j;
180
    static const struct shape *lastshape;
181
 
182
    /* always leave cursor after last displayed point */
183
    curscreen[D_LAST * B_COLS - 1] = -1;
184
 
185
    if (score != curscore) {
1524 palkovsky 186
        moveto(0, 0);
1532 palkovsky 187
        printf("Score: %d", score);
1419 jermar 188
        curscore = score;
189
    }
190
 
191
    /* draw preview of next pattern */
192
    if (showpreview && (nextshape != lastshape)) {
193
        int i;
194
        static int r=5, c=2;
195
        int tr, tc, t;
196
 
197
        lastshape = nextshape;
198
 
199
        /* clean */
1524 palkovsky 200
        resume_normal();
1419 jermar 201
        moveto(r-1, c-1); putstr("          ");
202
        moveto(r,   c-1); putstr("          ");
203
        moveto(r+1, c-1); putstr("          ");
204
        moveto(r+2, c-1); putstr("          ");
205
 
206
        moveto(r-3, c-2);
207
        putstr("Next shape:");
208
 
209
        /* draw */
1524 palkovsky 210
        start_standout();
1419 jermar 211
        moveto(r, 2 * c);
1524 palkovsky 212
        putstr("  ");
1419 jermar 213
        for (i = 0; i < 3; i++) {
214
            t = c + r * B_COLS;
215
            t += nextshape->off[i];
216
 
217
            tr = t / B_COLS;
218
            tc = t % B_COLS;
219
 
220
            moveto(tr, 2*tc);
1524 palkovsky 221
            putstr("  ");
1419 jermar 222
        }
1524 palkovsky 223
        resume_normal();
1419 jermar 224
    }
225
 
226
    bp = &board[D_FIRST * B_COLS];
227
    sp = &curscreen[D_FIRST * B_COLS];
228
    for (j = D_FIRST; j < D_LAST; j++) {
229
        ccol = -1;
230
        for (i = 0; i < B_COLS; bp++, sp++, i++) {
231
            if (*sp == (so = *bp))
232
                continue;
233
            *sp = so;
234
            if (i != ccol) {
1532 palkovsky 235
                if (cur_so) {
236
                    resume_normal();
237
                    cur_so = 0;
238
                }
1419 jermar 239
                moveto(RTOD(j), CTOD(i));
240
            }
1524 palkovsky 241
            if (so != cur_so) {
242
                if (so)
243
                    start_standout();
244
                else
245
                    resume_normal();
246
                cur_so = so;
247
            }
248
            putstr("  ");
1532 palkovsky 249
 
1419 jermar 250
            ccol = i + 1;
251
            /*
252
             * Look ahead a bit, to avoid extra motion if
253
             * we will be redrawing the cell after the next.
254
             * Motion probably takes four or more characters,
255
             * so we save even if we rewrite two cells
256
             * `unnecessarily'.  Skip it all, though, if
257
             * the next cell is a different color.
258
             */
259
#define STOP (B_COLS - 3)
260
            if (i > STOP || sp[1] != bp[1] || so != bp[1])
261
                continue;
262
            if (sp[2] != bp[2])
263
                sp[1] = -1;
264
            else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {
265
                sp[2] = -1;
266
                sp[1] = -1;
267
            }
268
        }
269
    }
1532 palkovsky 270
    if (cur_so)
271
        resume_normal();
4201 trochtova 272
    fflush(stdout);
1419 jermar 273
}
274
 
275
/*
276
 * Write a message (set!=0), or clear the same message (set==0).
277
 * (We need its length in case we have to overwrite with blanks.)
278
 */
279
void
280
scr_msg(char *s, int set)
281
{
282
 
4296 trochtova 283
    int l = str_size(s);
1528 palkovsky 284
 
285
    moveto(Rows - 2, ((Cols - l) >> 1) - 1);
286
    if (set)
287
        putstr(s);
288
    else
289
        while (--l >= 0)
290
            (void) putchar(' ');
1419 jermar 291
}
1653 cejka 292
 
293
/** @}
294
 */
295