| 1 | /* $OpenBSD: screen.c,v 1.13 2006/04/20 03:25:36 ray Exp $ */
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| 2 | /* $NetBSD: screen.c,v 1.4 1995/04/29 01:11:36 mycroft Exp $ */
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| 3 |
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| 4 | /*-
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| 5 | * Copyright (c) 1992, 1993
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| 6 | * The Regents of the University of California. All rights reserved.
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| 7 | *
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| 8 | * This code is derived from software contributed to Berkeley by
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| 9 | * Chris Torek and Darren F. Provine.
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| 10 | *
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| 11 | * Redistribution and use in source and binary forms, with or without
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| 12 | * modification, are permitted provided that the following conditions
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| 13 | * are met:
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| 14 | * 1. Redistributions of source code must retain the above copyright
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| 15 | * notice, this list of conditions and the following disclaimer.
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| 16 | * 2. Redistributions in binary form must reproduce the above copyright
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| 17 | * notice, this list of conditions and the following disclaimer in the
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| 18 | * documentation and/or other materials provided with the distribution.
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| 19 | * 3. Neither the name of the University nor the names of its contributors
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| 20 | * may be used to endorse or promote products derived from this software
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| 21 | * without specific prior written permission.
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| 22 | *
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| 23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 33 | * SUCH DAMAGE.
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| 34 | *
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| 35 | * @(#)screen.c 8.1 (Berkeley) 5/31/93
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| 36 | */
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| 37 |
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| 38 | /*
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| 39 | * Tetris screen control.
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| 40 | */
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| 41 |
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| 42 | #include <err.h>
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| 43 | #include <stdio.h>
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| 44 | #include <stdlib.h>
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| 45 | #include <string.h>
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| 46 | #include <unistd.h>
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| 47 | #include <io/stream.h>
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| 48 |
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| 49 |
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| 50 | #include <async.h>
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| 51 | #include "screen.h"
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| 52 | #include "tetris.h"
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| 53 | #include "../console/console.h"
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| 54 |
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| 55 | static cell curscreen[B_SIZE]; /* 1 => standout (or otherwise marked) */
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| 56 | static int curscore;
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| 57 | static int isset; /* true => terminal is in game mode */
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| 58 | static void (*tstp)(int);
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| 59 |
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| 60 | static void scr_stop(int);
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| 61 | static void stopset(int);
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| 62 |
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| 63 | static char
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| 64 | *CEstr; /* clear to end of line */
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| 65 |
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| 66 |
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| 67 | /*
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| 68 | * putstr() is for unpadded strings (either as in termcap(5) or
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| 69 | * simply literal strings);
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| 70 | */
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| 71 | static inline void putstr(char *s)
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| 72 | {
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| 73 | while (*s)
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| 74 | putchar(*(s++));
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| 75 | }
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| 76 |
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| 77 | static int con_phone;
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| 78 |
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| 79 |
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| 80 |
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| 81 | static void set_style(int fgcolor, int bgcolor)
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| 82 | {
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| 83 | send_call_2(con_phone, CONSOLE_SET_STYLE, fgcolor, bgcolor);
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| 84 | }
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| 85 |
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| 86 | static void start_standout(void)
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| 87 | {
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| 88 | set_style(0, 0xe0e0e0);
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| 89 | }
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| 90 |
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| 91 | static void resume_normal(void)
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| 92 | {
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| 93 | set_style(0xe0e0e0, 0);
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| 94 | }
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| 95 |
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| 96 | /*
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| 97 | * Clear the screen, forgetting the current contents in the process.
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| 98 | */
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| 99 | void
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| 100 | scr_clear(void)
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| 101 | {
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| 102 |
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| 103 | resume_normal();
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| 104 | send_call(con_phone, CONSOLE_CLEAR, 0);
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| 105 | curscore = -1;
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| 106 | memset((char *)curscreen, 0, sizeof(curscreen));
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| 107 | }
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| 108 |
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| 109 | /*
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| 110 | * Set up screen
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| 111 | */
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| 112 | void
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| 113 | scr_init(void)
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| 114 | {
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| 115 | con_phone = get_fd_phone(1);
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| 116 | send_call(con_phone, CONSOLE_CURSOR_VISIBILITY, 0);
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| 117 | resume_normal();
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| 118 | scr_clear();
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| 119 | }
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| 120 |
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| 121 | static void moveto(int r, int c)
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| 122 | {
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| 123 | send_call_2(con_phone, CONSOLE_GOTO, r, c);
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| 124 | }
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| 125 |
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| 126 | static void fflush(void)
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| 127 | {
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| 128 | send_call(con_phone, CONSOLE_FLUSH, 0);
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| 129 | }
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| 130 |
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| 131 | struct winsize {
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| 132 | ipcarg_t ws_row;
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| 133 | ipcarg_t ws_col;
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| 134 | };
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| 135 |
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| 136 | static int get_display_size(struct winsize *ws)
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| 137 | {
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| 138 | return sync_send_2(con_phone, CONSOLE_GETSIZE, 0, 0, &ws->ws_row, &ws->ws_col);
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| 139 | }
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| 140 |
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| 141 | static void
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| 142 | scr_stop(int sig)
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| 143 | {
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| 144 |
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| 145 | scr_end();
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| 146 | scr_set();
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| 147 | scr_msg(key_msg, 1);
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| 148 | }
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| 149 |
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| 150 | /*
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| 151 | * Set up screen mode.
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| 152 | */
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| 153 | void
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| 154 | scr_set(void)
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| 155 | {
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| 156 | struct winsize ws;
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| 157 |
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| 158 | Rows = 0, Cols = 0;
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| 159 | if (get_display_size(&ws) == 0) {
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| 160 | Rows = ws.ws_row;
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| 161 | Cols = ws.ws_col;
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| 162 | }
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| 163 | if (Rows < MINROWS || Cols < MINCOLS) {
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| 164 | char smallscr[55];
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| 165 |
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| 166 | snprintf(smallscr, sizeof(smallscr),
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| 167 | "the screen is too small (must be at least %dx%d)",
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| 168 | MINROWS, MINCOLS);
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| 169 | stop(smallscr);
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| 170 | }
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| 171 | isset = 1;
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| 172 |
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| 173 | scr_clear();
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| 174 | }
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| 175 |
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| 176 | /*
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| 177 | * End screen mode.
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| 178 | */
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| 179 | void
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| 180 | scr_end(void)
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| 181 | {
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| 182 | }
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| 183 |
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| 184 | void
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| 185 | stop(char *why)
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| 186 | {
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| 187 |
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| 188 | if (isset)
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| 189 | scr_end();
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| 190 | errx(1, "aborting: %s", why);
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| 191 | }
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| 192 |
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| 193 |
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| 194 | /*
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| 195 | * Update the screen.
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| 196 | */
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| 197 | void
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| 198 | scr_update(void)
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| 199 | {
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| 200 | cell *bp, *sp;
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| 201 | cell so, cur_so = 0;
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| 202 | int i, ccol, j;
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| 203 | static const struct shape *lastshape;
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| 204 |
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| 205 | /* always leave cursor after last displayed point */
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| 206 | curscreen[D_LAST * B_COLS - 1] = -1;
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| 207 |
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| 208 | if (score != curscore) {
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| 209 | moveto(0, 0);
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| 210 | printf("Score: %d", score);
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| 211 | curscore = score;
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| 212 | }
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| 213 |
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| 214 | /* draw preview of next pattern */
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| 215 | if (showpreview && (nextshape != lastshape)) {
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| 216 | int i;
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| 217 | static int r=5, c=2;
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| 218 | int tr, tc, t;
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| 219 |
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| 220 | lastshape = nextshape;
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| 221 |
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| 222 | /* clean */
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| 223 | resume_normal();
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| 224 | moveto(r-1, c-1); putstr(" ");
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| 225 | moveto(r, c-1); putstr(" ");
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| 226 | moveto(r+1, c-1); putstr(" ");
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| 227 | moveto(r+2, c-1); putstr(" ");
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| 228 |
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| 229 | moveto(r-3, c-2);
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| 230 | putstr("Next shape:");
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| 231 |
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| 232 | /* draw */
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| 233 | start_standout();
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| 234 | moveto(r, 2 * c);
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| 235 | putstr(" ");
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| 236 | for (i = 0; i < 3; i++) {
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| 237 | t = c + r * B_COLS;
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| 238 | t += nextshape->off[i];
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| 239 |
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| 240 | tr = t / B_COLS;
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| 241 | tc = t % B_COLS;
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| 242 |
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| 243 | moveto(tr, 2*tc);
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| 244 | putstr(" ");
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| 245 | }
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| 246 | resume_normal();
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| 247 | }
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| 248 |
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| 249 | bp = &board[D_FIRST * B_COLS];
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| 250 | sp = &curscreen[D_FIRST * B_COLS];
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| 251 | for (j = D_FIRST; j < D_LAST; j++) {
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| 252 | ccol = -1;
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| 253 | for (i = 0; i < B_COLS; bp++, sp++, i++) {
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| 254 | if (*sp == (so = *bp))
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| 255 | continue;
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| 256 | *sp = so;
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| 257 | if (i != ccol) {
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| 258 | if (cur_so) {
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| 259 | resume_normal();
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| 260 | cur_so = 0;
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| 261 | }
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| 262 | moveto(RTOD(j), CTOD(i));
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| 263 | }
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| 264 | if (so != cur_so) {
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| 265 | if (so)
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| 266 | start_standout();
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| 267 | else
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| 268 | resume_normal();
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| 269 | cur_so = so;
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| 270 | }
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| 271 | putstr(" ");
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| 272 |
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| 273 | ccol = i + 1;
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| 274 | /*
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| 275 | * Look ahead a bit, to avoid extra motion if
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| 276 | * we will be redrawing the cell after the next.
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| 277 | * Motion probably takes four or more characters,
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| 278 | * so we save even if we rewrite two cells
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| 279 | * `unnecessarily'. Skip it all, though, if
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| 280 | * the next cell is a different color.
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| 281 | */
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| 282 | #define STOP (B_COLS - 3)
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| 283 | if (i > STOP || sp[1] != bp[1] || so != bp[1])
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| 284 | continue;
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| 285 | if (sp[2] != bp[2])
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| 286 | sp[1] = -1;
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| 287 | else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {
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| 288 | sp[2] = -1;
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| 289 | sp[1] = -1;
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| 290 | }
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| 291 | }
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| 292 | }
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| 293 | if (cur_so)
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| 294 | resume_normal();
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| 295 | fflush();
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| 296 | }
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| 297 |
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| 298 | /*
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| 299 | * Write a message (set!=0), or clear the same message (set==0).
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| 300 | * (We need its length in case we have to overwrite with blanks.)
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| 301 | */
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| 302 | void
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| 303 | scr_msg(char *s, int set)
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| 304 | {
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| 305 |
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| 306 | int l = strlen(s);
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| 307 |
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| 308 | moveto(Rows - 2, ((Cols - l) >> 1) - 1);
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| 309 | if (set)
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| 310 | putstr(s);
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| 311 | else
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| 312 | while (--l >= 0)
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| 313 | (void) putchar(' ');
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| 314 | }
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