| 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 <string.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 "screen.h"
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| 56 | #include "tetris.h"
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| 57 | #include <io/console.h>
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| 58 |
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| 59 | #define STOP (B_COLS - 3)
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| 60 |
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| 61 | static cell curscreen[B_SIZE]; /* non-zero => standout (or otherwise marked) */
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| 62 | static int curscore;
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| 63 | static int isset; /* true => terminal is in game mode */
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| 64 |
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| 65 | static int use_color; /* true => use colors */
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| 66 |
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| 67 | static const struct shape *lastshape;
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| 68 |
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| 69 |
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| 70 | /*
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| 71 | * putstr() is for unpadded strings (either as in termcap(5) or
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| 72 | * simply literal strings);
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| 73 | */
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| 74 | static inline void putstr(char *s)
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| 75 | {
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| 76 | while (*s)
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| 77 | putchar(*(s++));
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| 78 | }
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| 79 |
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| 80 | static void start_standout(uint32_t color)
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| 81 | {
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| 82 | fflush(stdout);
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| 83 | console_set_rgb_color(fphone(stdout), 0xf0f0f0,
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| 84 | use_color ? color : 0x000000);
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| 85 | }
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| 86 |
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| 87 | static void resume_normal(void)
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| 88 | {
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| 89 | fflush(stdout);
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| 90 | console_set_rgb_color(fphone(stdout), 0, 0xf0f0f0);
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| 91 | }
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| 92 |
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| 93 | void clear_screen(void)
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| 94 | {
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| 95 | console_clear(fphone(stdout));
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| 96 | moveto(0, 0);
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| 97 | }
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| 98 |
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| 99 | /*
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| 100 | * Clear the screen, forgetting the current contents in the process.
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| 101 | */
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| 102 | void scr_clear(void)
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| 103 | {
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| 104 | resume_normal();
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| 105 | console_clear(fphone(stdout));
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| 106 | curscore = -1;
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| 107 | memset(curscreen, 0, sizeof(curscreen));
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| 108 | }
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| 109 |
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| 110 | /*
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| 111 | * Set up screen
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| 112 | */
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| 113 | void scr_init(void)
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| 114 | {
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| 115 | console_cursor_visibility(fphone(stdout), 0);
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| 116 | resume_normal();
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| 117 | scr_clear();
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| 118 | }
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| 119 |
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| 120 | void moveto(int r, int c)
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| 121 | {
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| 122 | fflush(stdout);
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| 123 | console_goto(fphone(stdout), c, r);
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| 124 | }
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| 125 |
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| 126 | winsize_t winsize;
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| 127 |
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| 128 | static int get_display_size(winsize_t *ws)
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| 129 | {
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| 130 | return console_get_size(fphone(stdout), &ws->ws_col, &ws->ws_row);
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| 131 | }
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| 132 |
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| 133 | static int get_display_color_sup(void)
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| 134 | {
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| 135 | int rc;
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| 136 | int ccap;
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| 137 |
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| 138 | rc = console_get_color_cap(fphone(stdout), &ccap);
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| 139 | if (rc != 0)
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| 140 | return 0;
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| 141 |
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| 142 | return (ccap >= CONSOLE_CCAP_RGB);
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| 143 | }
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| 144 |
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| 145 | /*
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| 146 | * Set up screen mode.
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| 147 | */
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| 148 | void scr_set(void)
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| 149 | {
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| 150 | winsize_t ws;
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| 151 |
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| 152 | Rows = 0;
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| 153 | Cols = 0;
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| 154 |
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| 155 | if (get_display_size(&ws) == 0) {
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| 156 | Rows = ws.ws_row;
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| 157 | Cols = ws.ws_col;
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| 158 | }
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| 159 |
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| 160 | use_color = get_display_color_sup();
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| 161 |
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| 162 | if ((Rows < MINROWS) || (Cols < MINCOLS)) {
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| 163 | char smallscr[55];
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| 164 |
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| 165 | snprintf(smallscr, sizeof(smallscr),
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| 166 | "the screen is too small (must be at least %dx%d)",
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| 167 | MINROWS, MINCOLS);
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| 168 | stop(smallscr);
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| 169 | }
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| 170 | isset = 1;
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| 171 |
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| 172 | scr_clear();
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| 173 | }
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| 174 |
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| 175 | /*
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| 176 | * End screen mode.
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| 177 | */
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| 178 | void scr_end(void)
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| 179 | {
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| 180 | console_cursor_visibility(fphone(stdout), 1);
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| 181 | }
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| 182 |
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| 183 | void stop(char *why)
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| 184 | {
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| 185 | if (isset)
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| 186 | scr_end();
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| 187 |
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| 188 | errx(1, "aborting: %s", why);
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| 189 | }
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| 190 |
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| 191 | /*
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| 192 | * Update the screen.
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| 193 | */
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| 194 | void scr_update(void)
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| 195 | {
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| 196 | cell *bp;
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| 197 | cell *sp;
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| 198 | cell so;
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| 199 | cell cur_so = 0;
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| 200 | int i;
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| 201 | int j;
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| 202 | int ccol;
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| 203 |
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| 204 | /* Always leave cursor after last displayed point */
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| 205 | curscreen[D_LAST * B_COLS - 1] = -1;
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| 206 |
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| 207 | if (score != curscore) {
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| 208 | moveto(0, 0);
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| 209 | printf("Score: %d", score);
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| 210 | curscore = score;
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| 211 | }
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| 212 |
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| 213 | /* Draw preview of next pattern */
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| 214 | if ((showpreview) && (nextshape != lastshape)) {
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| 215 | int i;
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| 216 | static int r = 5, c = 2;
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| 217 | int tr, tc, t;
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| 218 |
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| 219 | lastshape = nextshape;
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| 220 |
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| 221 | /* Clean */
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| 222 | resume_normal();
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| 223 | moveto(r - 1, c - 1);
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| 224 | putstr(" ");
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| 225 | moveto(r, c - 1);
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| 226 | putstr(" ");
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| 227 | moveto(r + 1, c - 1);
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| 228 | putstr(" ");
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| 229 | moveto(r + 2, c - 1);
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| 230 | putstr(" ");
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| 231 |
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| 232 | moveto(r - 3, c - 2);
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| 233 | putstr("Next shape:");
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| 234 |
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| 235 | /* Draw */
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| 236 | start_standout(nextshape->color);
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| 237 | moveto(r, 2 * c);
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| 238 | putstr(" ");
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| 239 | for (i = 0; i < 3; i++) {
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| 240 | t = c + r * B_COLS;
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| 241 | t += nextshape->off[i];
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| 242 |
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| 243 | tr = t / B_COLS;
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| 244 | tc = t % B_COLS;
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| 245 |
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| 246 | moveto(tr, 2*tc);
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| 247 | putstr(" ");
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| 248 | }
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| 249 | resume_normal();
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| 250 | }
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| 251 |
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| 252 | bp = &board[D_FIRST * B_COLS];
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| 253 | sp = &curscreen[D_FIRST * B_COLS];
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| 254 | for (j = D_FIRST; j < D_LAST; j++) {
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| 255 | ccol = -1;
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| 256 | for (i = 0; i < B_COLS; bp++, sp++, i++) {
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| 257 | if (*sp == (so = *bp))
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| 258 | continue;
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| 259 |
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| 260 | *sp = so;
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| 261 | if (i != ccol) {
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| 262 | if (cur_so) {
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| 263 | resume_normal();
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| 264 | cur_so = 0;
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| 265 | }
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| 266 | moveto(RTOD(j), CTOD(i));
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| 267 | }
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| 268 |
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| 269 | if (so != cur_so) {
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| 270 | if (so)
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| 271 | start_standout(so);
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| 272 | else
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| 273 | resume_normal();
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| 274 | cur_so = so;
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| 275 | }
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| 276 | putstr(" ");
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| 277 |
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| 278 | ccol = i + 1;
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| 279 | /*
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| 280 | * Look ahead a bit, to avoid extra motion if
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| 281 | * we will be redrawing the cell after the next.
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| 282 | * Motion probably takes four or more characters,
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| 283 | * so we save even if we rewrite two cells
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| 284 | * `unnecessarily'. Skip it all, though, if
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| 285 | * the next cell is a different color.
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| 286 | */
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| 287 |
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| 288 | if ((i > STOP) || (sp[1] != bp[1]) || (so != bp[1]))
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| 289 | continue;
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| 290 |
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| 291 | if (sp[2] != bp[2])
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| 292 | sp[1] = -1;
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| 293 | else if ((i < STOP) && (so == bp[2]) && (sp[3] != bp[3])) {
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| 294 | sp[2] = -1;
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| 295 | sp[1] = -1;
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| 296 | }
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| 297 | }
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| 298 | }
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| 299 |
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| 300 | if (cur_so)
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| 301 | resume_normal();
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| 302 |
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| 303 | fflush(stdout);
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| 304 | }
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| 305 |
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| 306 | /*
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| 307 | * Write a message (set != 0), or clear the same message (set == 0).
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| 308 | * (We need its length in case we have to overwrite with blanks.)
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| 309 | */
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| 310 | void scr_msg(char *s, int set)
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| 311 | {
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| 312 | int l = str_size(s);
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| 313 |
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| 314 | moveto(Rows - 2, ((Cols - l) >> 1) - 1);
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| 315 |
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| 316 | if (set)
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| 317 | putstr(s);
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| 318 | else
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| 319 | while (--l >= 0)
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| 320 | (void) putchar(' ');
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| 321 | }
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| 322 |
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| 323 | /** @}
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| 324 | */
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