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/* $OpenBSD: screen.c,v 1.13 2006/04/20 03:25:36 ray Exp $ */
/* $NetBSD: screen.c,v 1.4 1995/04/29 01:11:36 mycroft Exp $ */
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek and Darren F. Provine.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)screen.c 8.1 (Berkeley) 5/31/93
*/
/** @addtogroup tetris
* @{
*/
/** @file
*/
/*
* Tetris screen control.
*/
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <io/stream.h>
#include <async.h>
#include "screen.h"
#include "tetris.h"
#include "../../srv/console/console.h"
static cell curscreen[B_SIZE]; /* 1 => standout (or otherwise marked) */
static int curscore;
static int isset; /* true => terminal is in game mode */
/*
* putstr() is for unpadded strings (either as in termcap(5) or
* simply literal strings);
*/
static inline void putstr(char *s)
{
while (*s)
putchar(*(s++));
}
static int con_phone;
static void set_style(int fgcolor, int bgcolor)
{
async_msg_2(con_phone, CONSOLE_SET_STYLE, fgcolor, bgcolor);
}
static void start_standout(void)
{
set_style(0xf0f0f0, 0);
}
static void resume_normal(void)
{
set_style(0, 0xf0f0f0);
}
void clear_screen(void)
{
async_msg_0(con_phone, CONSOLE_CLEAR);
moveto(0, 0);
}
/*
* Clear the screen, forgetting the current contents in the process.
*/
void
scr_clear(void)
{
resume_normal();
async_msg_0(con_phone, CONSOLE_CLEAR);
curscore = -1;
memset((char *)curscreen, 0, sizeof(curscreen));
}
/*
* Set up screen
*/
void
scr_init(void)
{
con_phone = get_fd_phone(1);
async_msg_1(con_phone, CONSOLE_CURSOR_VISIBILITY, 0);
resume_normal();
scr_clear();
}
void moveto(int r, int c)
{
async_msg_2(con_phone, CONSOLE_GOTO, r, c);
}
static void fflush(void)
{
async_msg_0(con_phone, CONSOLE_FLUSH);
}
winsize_t winsize;
static int get_display_size(winsize_t *ws)
{
return async_req_0_2(con_phone, CONSOLE_GETSIZE, &ws->ws_row,
&ws->ws_col);
}
/*
* Set up screen mode.
*/
void
scr_set(void)
{
winsize_t ws;
Rows = 0, Cols = 0;
if (get_display_size(&ws) == 0) {
Rows = ws.ws_row;
Cols = ws.ws_col;
}
if (Rows < MINROWS || Cols < MINCOLS) {
char smallscr[55];
snprintf(smallscr, sizeof(smallscr),
"the screen is too small (must be at least %dx%d)",
MINROWS, MINCOLS);
stop(smallscr);
}
isset = 1;
scr_clear();
}
/*
* End screen mode.
*/
void
scr_end(void)
{
}
void
stop(char *why)
{
if (isset)
scr_end();
errx(1, "aborting: %s", why);
}
/*
* Update the screen.
*/
void
scr_update(void)
{
cell *bp, *sp;
cell so, cur_so = 0;
int i, ccol, j;
static const struct shape *lastshape;
/* always leave cursor after last displayed point */
curscreen[D_LAST * B_COLS - 1] = -1;
if (score != curscore) {
moveto(0, 0);
printf("Score: %d", score);
curscore = score;
}
/* draw preview of next pattern */
if (showpreview && (nextshape != lastshape)) {
int i;
static int r=5, c=2;
int tr, tc, t;
lastshape = nextshape;
/* clean */
resume_normal();
moveto(r-1, c-1); putstr(" ");
moveto(r, c-1); putstr(" ");
moveto(r+1, c-1); putstr(" ");
moveto(r+2, c-1); putstr(" ");
moveto(r-3, c-2);
putstr("Next shape:");
/* draw */
start_standout();
moveto(r, 2 * c);
putstr(" ");
for (i = 0; i < 3; i++) {
t = c + r * B_COLS;
t += nextshape->off[i];
tr = t / B_COLS;
tc = t % B_COLS;
moveto(tr, 2*tc);
putstr(" ");
}
resume_normal();
}
bp = &board[D_FIRST * B_COLS];
sp = &curscreen[D_FIRST * B_COLS];
for (j = D_FIRST; j < D_LAST; j++) {
ccol = -1;
for (i = 0; i < B_COLS; bp++, sp++, i++) {
if (*sp == (so = *bp))
continue;
*sp = so;
if (i != ccol) {
if (cur_so) {
resume_normal();
cur_so = 0;
}
moveto(RTOD(j), CTOD(i));
}
if (so != cur_so) {
if (so)
start_standout();
else
resume_normal();
cur_so = so;
}
putstr(" ");
ccol = i + 1;
/*
* Look ahead a bit, to avoid extra motion if
* we will be redrawing the cell after the next.
* Motion probably takes four or more characters,
* so we save even if we rewrite two cells
* `unnecessarily'. Skip it all, though, if
* the next cell is a different color.
*/
#define STOP (B_COLS - 3)
if (i > STOP || sp[1] != bp[1] || so != bp[1])
continue;
if (sp[2] != bp[2])
sp[1] = -1;
else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {
sp[2] = -1;
sp[1] = -1;
}
}
}
if (cur_so)
resume_normal();
fflush();
}
/*
* Write a message (set!=0), or clear the same message (set==0).
* (We need its length in case we have to overwrite with blanks.)
*/
void
scr_msg(char *s, int set)
{
int l = strlen(s);
moveto(Rows - 2, ((Cols - l) >> 1) - 1);
if (set)
putstr(s);
else
while (--l >= 0)
(void) putchar(' ');
}
/** @}
*/