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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
/*-
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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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/*
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
{
97
 
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
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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
 
1524 palkovsky 120
static void fflush(void)
121
{
4055 trochtova 122
    console_flush();
1524 palkovsky 123
}
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1590 cejka 125
winsize_t winsize;
1524 palkovsky 126
 
1590 cejka 127
static int get_display_size(winsize_t *ws)
1524 palkovsky 128
{
4055 trochtova 129
    return console_get_size(&ws->ws_row, &ws->ws_col);
1524 palkovsky 130
}
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1419 jermar 132
/*
133
 * Set up screen mode.
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 */
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void
136
scr_set(void)
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{
1590 cejka 138
    winsize_t ws;
1419 jermar 139
 
140
    Rows = 0, Cols = 0;
1524 palkovsky 141
    if (get_display_size(&ws) == 0) {
1419 jermar 142
        Rows = ws.ws_row;
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        Cols = ws.ws_col;
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    }
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    if (Rows < MINROWS || Cols < MINCOLS) {
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        char smallscr[55];
147
 
1532 palkovsky 148
        snprintf(smallscr, sizeof(smallscr),
1419 jermar 149
            "the screen is too small (must be at least %dx%d)",
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            MINROWS, MINCOLS);
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        stop(smallscr);
152
    }
153
    isset = 1;
1519 palkovsky 154
 
1419 jermar 155
    scr_clear();
156
}
157
 
158
/*
159
 * End screen mode.
160
 */
161
void
162
scr_end(void)
163
{
164
}
165
 
166
void
167
stop(char *why)
168
{
169
 
170
    if (isset)
171
        scr_end();
172
    errx(1, "aborting: %s", why);
173
}
174
 
175
 
176
/*
177
 * Update the screen.
178
 */
179
void
180
scr_update(void)
181
{
182
    cell *bp, *sp;
1528 palkovsky 183
    cell so, cur_so = 0;
1419 jermar 184
    int i, ccol, j;
185
    static const struct shape *lastshape;
186
 
187
    /* always leave cursor after last displayed point */
188
    curscreen[D_LAST * B_COLS - 1] = -1;
189
 
190
    if (score != curscore) {
1524 palkovsky 191
        moveto(0, 0);
1532 palkovsky 192
        printf("Score: %d", score);
1419 jermar 193
        curscore = score;
194
    }
195
 
196
    /* draw preview of next pattern */
197
    if (showpreview && (nextshape != lastshape)) {
198
        int i;
199
        static int r=5, c=2;
200
        int tr, tc, t;
201
 
202
        lastshape = nextshape;
203
 
204
        /* clean */
1524 palkovsky 205
        resume_normal();
1419 jermar 206
        moveto(r-1, c-1); putstr("          ");
207
        moveto(r,   c-1); putstr("          ");
208
        moveto(r+1, c-1); putstr("          ");
209
        moveto(r+2, c-1); putstr("          ");
210
 
211
        moveto(r-3, c-2);
212
        putstr("Next shape:");
213
 
214
        /* draw */
1524 palkovsky 215
        start_standout();
1419 jermar 216
        moveto(r, 2 * c);
1524 palkovsky 217
        putstr("  ");
1419 jermar 218
        for (i = 0; i < 3; i++) {
219
            t = c + r * B_COLS;
220
            t += nextshape->off[i];
221
 
222
            tr = t / B_COLS;
223
            tc = t % B_COLS;
224
 
225
            moveto(tr, 2*tc);
1524 palkovsky 226
            putstr("  ");
1419 jermar 227
        }
1524 palkovsky 228
        resume_normal();
1419 jermar 229
    }
230
 
231
    bp = &board[D_FIRST * B_COLS];
232
    sp = &curscreen[D_FIRST * B_COLS];
233
    for (j = D_FIRST; j < D_LAST; j++) {
234
        ccol = -1;
235
        for (i = 0; i < B_COLS; bp++, sp++, i++) {
236
            if (*sp == (so = *bp))
237
                continue;
238
            *sp = so;
239
            if (i != ccol) {
1532 palkovsky 240
                if (cur_so) {
241
                    resume_normal();
242
                    cur_so = 0;
243
                }
1419 jermar 244
                moveto(RTOD(j), CTOD(i));
245
            }
1524 palkovsky 246
            if (so != cur_so) {
247
                if (so)
248
                    start_standout();
249
                else
250
                    resume_normal();
251
                cur_so = so;
252
            }
253
            putstr("  ");
1532 palkovsky 254
 
1419 jermar 255
            ccol = i + 1;
256
            /*
257
             * Look ahead a bit, to avoid extra motion if
258
             * we will be redrawing the cell after the next.
259
             * Motion probably takes four or more characters,
260
             * so we save even if we rewrite two cells
261
             * `unnecessarily'.  Skip it all, though, if
262
             * the next cell is a different color.
263
             */
264
#define STOP (B_COLS - 3)
265
            if (i > STOP || sp[1] != bp[1] || so != bp[1])
266
                continue;
267
            if (sp[2] != bp[2])
268
                sp[1] = -1;
269
            else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {
270
                sp[2] = -1;
271
                sp[1] = -1;
272
            }
273
        }
274
    }
1532 palkovsky 275
    if (cur_so)
276
        resume_normal();
1524 palkovsky 277
    fflush();
1419 jermar 278
}
279
 
280
/*
281
 * Write a message (set!=0), or clear the same message (set==0).
282
 * (We need its length in case we have to overwrite with blanks.)
283
 */
284
void
285
scr_msg(char *s, int set)
286
{
287
 
1528 palkovsky 288
    int l = strlen(s);
289
 
290
    moveto(Rows - 2, ((Cols - l) >> 1) - 1);
291
    if (set)
292
        putstr(s);
293
    else
294
        while (--l >= 0)
295
            (void) putchar(' ');
1419 jermar 296
}
1653 cejka 297
 
298
/** @}
299
 */
300