| 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 | /** @addtogroup tetris
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| 39 | * @{
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| 40 | */
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| 41 | /** @file
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| 42 | */
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| 43 |
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| 44 | /*
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| 45 | * Tetris screen control.
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| 46 | */
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| 47 |
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| 48 | #include <err.h>
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| 49 | #include <stdio.h>
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| 50 | #include <stdlib.h>
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| 51 | #include <str.h>
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| 52 | #include <unistd.h>
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| 53 | #include <vfs/vfs.h>
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| 54 | #include <async.h>
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| 55 | #include <bool.h>
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| 56 | #include <io/console.h>
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| 57 | #include <io/style.h>
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| 58 | #include "screen.h"
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| 59 | #include "tetris.h"
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| 60 |
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| 61 | #define STOP (B_COLS - 3)
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| 62 |
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| 63 | static cell curscreen[B_SIZE]; /* non-zero => standout (or otherwise marked) */
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| 64 | static int curscore;
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| 65 | static int isset; /* true => terminal is in game mode */
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| 66 |
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| 67 | static bool use_color; /* true => use colors */
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| 68 |
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| 69 | static const struct shape *lastshape;
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| 70 |
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| 71 |
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| 72 | /*
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| 73 | * putstr() is for unpadded strings (either as in termcap(5) or
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| 74 | * simply literal strings);
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| 75 | */
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| 76 | static inline void putstr(const char *s)
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| 77 | {
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| 78 | while (*s)
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| 79 | putchar(*(s++));
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| 80 | }
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| 81 |
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| 82 | static void start_standout(uint32_t color)
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| 83 | {
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| 84 | fflush(stdout);
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| 85 | console_set_rgb_color(fphone(stdout), 0xffffff,
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| 86 | use_color ? color : 0x000000);
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| 87 | }
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| 88 |
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| 89 | static void resume_normal(void)
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| 90 | {
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| 91 | fflush(stdout);
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| 92 | console_set_style(fphone(stdout), STYLE_NORMAL);
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| 93 | }
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| 94 |
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| 95 | void clear_screen(void)
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| 96 | {
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| 97 | console_clear(fphone(stdout));
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| 98 | moveto(0, 0);
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| 99 | }
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| 100 |
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| 101 | /*
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| 102 | * Clear the screen, forgetting the current contents in the process.
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| 103 | */
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| 104 | void scr_clear(void)
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| 105 | {
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| 106 | resume_normal();
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| 107 | console_clear(fphone(stdout));
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| 108 | curscore = -1;
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| 109 | memset(curscreen, 0, sizeof(curscreen));
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| 110 | }
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| 111 |
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| 112 | /*
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| 113 | * Set up screen
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| 114 | */
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| 115 | void scr_init(void)
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| 116 | {
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| 117 | console_cursor_visibility(fphone(stdout), 0);
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| 118 | resume_normal();
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| 119 | scr_clear();
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| 120 | }
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| 121 |
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| 122 | void moveto(sysarg_t r, sysarg_t c)
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| 123 | {
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| 124 | fflush(stdout);
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| 125 | console_set_pos(fphone(stdout), c, r);
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| 126 | }
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| 127 |
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| 128 | winsize_t winsize;
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| 129 |
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| 130 | static int get_display_size(winsize_t *ws)
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| 131 | {
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| 132 | return console_get_size(fphone(stdout), &ws->ws_col, &ws->ws_row);
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| 133 | }
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| 134 |
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| 135 | static bool get_display_color_sup(void)
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| 136 | {
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| 137 | sysarg_t ccap;
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| 138 | int rc = console_get_color_cap(fphone(stdout), &ccap);
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| 139 |
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| 140 | if (rc != 0)
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| 141 | return false;
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| 142 |
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| 143 | return (ccap >= CONSOLE_CCAP_RGB);
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| 144 | }
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| 145 |
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| 146 | /*
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| 147 | * Set up screen mode.
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| 148 | */
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| 149 | void scr_set(void)
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| 150 | {
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| 151 | winsize_t ws;
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| 152 |
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| 153 | Rows = 0;
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| 154 | Cols = 0;
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| 155 |
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| 156 | if (get_display_size(&ws) == 0) {
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| 157 | Rows = ws.ws_row;
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| 158 | Cols = ws.ws_col;
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| 159 | }
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| 160 |
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| 161 | use_color = get_display_color_sup();
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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 scr_end(void)
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| 180 | {
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| 181 | console_cursor_visibility(fphone(stdout), 1);
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| 182 | }
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| 183 |
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| 184 | void stop(const char *why)
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| 185 | {
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| 186 | if (isset)
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| 187 | scr_end();
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| 188 |
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| 189 | errx(1, "aborting: %s", why);
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| 190 | }
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| 191 |
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| 192 | /*
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| 193 | * Update the screen.
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| 194 | */
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| 195 | void scr_update(void)
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| 196 | {
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| 197 | cell *bp;
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| 198 | cell *sp;
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| 199 | cell so;
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| 200 | cell cur_so = 0;
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| 201 | int i;
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| 202 | int j;
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| 203 | int ccol;
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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);
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| 225 | putstr(" ");
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| 226 | moveto(r, c - 1);
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| 227 | putstr(" ");
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| 228 | moveto(r + 1, c - 1);
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| 229 | putstr(" ");
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| 230 | moveto(r + 2, c - 1);
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| 231 | putstr(" ");
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| 232 |
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| 233 | moveto(r - 3, c - 2);
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| 234 | putstr("Next shape:");
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| 235 |
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| 236 | /* Draw */
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| 237 | start_standout(nextshape->color);
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| 238 | moveto(r, 2 * c);
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| 239 | putstr(" ");
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| 240 | for (i = 0; i < 3; i++) {
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| 241 | t = c + r * B_COLS;
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| 242 | t += nextshape->off[i];
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| 243 |
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| 244 | tr = t / B_COLS;
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| 245 | tc = t % B_COLS;
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| 246 |
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| 247 | moveto(tr, 2*tc);
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| 248 | putstr(" ");
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| 249 | }
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| 250 | resume_normal();
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| 251 | }
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| 252 |
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| 253 | bp = &board[D_FIRST * B_COLS];
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| 254 | sp = &curscreen[D_FIRST * B_COLS];
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| 255 | for (j = D_FIRST; j < D_LAST; j++) {
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| 256 | ccol = -1;
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| 257 | for (i = 0; i < B_COLS; bp++, sp++, i++) {
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| 258 | if (*sp == (so = *bp))
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| 259 | continue;
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| 260 |
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| 261 | *sp = so;
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| 262 | if (i != ccol) {
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| 263 | if (cur_so) {
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| 264 | resume_normal();
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| 265 | cur_so = 0;
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| 266 | }
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| 267 | moveto(RTOD(j), CTOD(i));
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| 268 | }
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| 269 |
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| 270 | if (so != cur_so) {
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| 271 | if (so)
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| 272 | start_standout(so);
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| 273 | else
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| 274 | resume_normal();
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| 275 | cur_so = so;
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| 276 | }
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| 277 | putstr(" ");
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| 278 |
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| 279 | ccol = i + 1;
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| 280 | /*
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| 281 | * Look ahead a bit, to avoid extra motion if
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| 282 | * we will be redrawing the cell after the next.
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| 283 | * Motion probably takes four or more characters,
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| 284 | * so we save even if we rewrite two cells
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| 285 | * `unnecessarily'. Skip it all, though, if
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| 286 | * the next cell is a different color.
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| 287 | */
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| 288 |
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| 289 | if ((i > STOP) || (sp[1] != bp[1]) || (so != bp[1]))
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| 290 | continue;
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| 291 |
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| 292 | if (sp[2] != bp[2])
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| 293 | sp[1] = -1;
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| 294 | else if ((i < STOP) && (so == bp[2]) && (sp[3] != bp[3])) {
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| 295 | sp[2] = -1;
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| 296 | sp[1] = -1;
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| 297 | }
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| 298 | }
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| 299 | }
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| 300 |
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| 301 | if (cur_so)
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| 302 | resume_normal();
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| 303 |
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| 304 | fflush(stdout);
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| 305 | }
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| 306 |
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| 307 | /*
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| 308 | * Write a message (set != 0), or clear the same message (set == 0).
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| 309 | * (We need its length in case we have to overwrite with blanks.)
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| 310 | */
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| 311 | void scr_msg(char *s, bool set)
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| 312 | {
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| 313 | int l = str_size(s);
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| 314 |
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| 315 | moveto(Rows - 2, ((Cols - l) >> 1) - 1);
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| 316 |
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| 317 | if (set)
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| 318 | putstr(s);
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| 319 | else
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| 320 | while (--l >= 0)
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| 321 | (void) putchar(' ');
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| 322 | }
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| 323 |
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| 324 | /** @}
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| 325 | */
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