/*
* Copyright (c) 2024 Jiri Svoboda
* Copyright (c) 2011 Martin Decky
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - 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.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/** Attributations
*
* screen.c 8.1 (Berkeley) 5/31/93
* NetBSD: screen.c,v 1.4 1995/04/29 01:11:36 mycroft
* OpenBSD: screen.c,v 1.13 2006/04/20 03:25:36 ray
*
* Based upon BSD Tetris
*
* Copyright (c) 1992, 1993
* The Regents of the University of California.
* Distributed under BSD license.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek and Darren F. Provine.
*
*/
/** @addtogroup tetris
* @{
*/
/** @file
*/
/*
* Tetris screen control.
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <str.h>
#include <vfs/vfs.h>
#include <async.h>
#include <stdbool.h>
#include <io/console.h>
#include <io/style.h>
#include "screen.h"
#include "tetris.h"
#define STOP (B_COLS - 3)
static cell curscreen[B_SIZE]; /* non-zero => standout (or otherwise marked) */
static int curscore;
static int isset; /* true => terminal is in game mode */
static bool use_rgb; /* true => use RGB colors */
static bool use_color; /* true => use indexed colors */
static const struct shape *lastshape;
static usec_t timeleft = 0;
bool size_changed;
console_ctrl_t *console;
/*
* putstr() is for unpadded strings (either as in termcap(5) or
* simply literal strings);
*/
static inline void putstr(const char *s)
{
while (*s)
putchar(*(s++));
}
static void start_standout(uint32_t color)
{
uint8_t bg;
uint8_t attr;
console_flush(console);
if (use_rgb) {
console_set_rgb_color(console, color, 0xffffff);
} else if (use_color) {
bg = 0x00;
attr = 0;
if ((color & 0xff0000) != 0)
bg |= 0x4;
if ((color & 0x00ff00) != 0)
bg |= 0x2;
if ((color & 0x0000ff) != 0)
bg |= 0x1;
console_set_color(console, bg, 0x00, attr);
}
}
static void resume_normal(void)
{
console_flush(console);
console_set_style(console, STYLE_NORMAL);
}
void clear_screen(void)
{
console_clear(console);
moveto(0, 0);
}
/*
* Clear the screen, forgetting the current contents in the process.
*/
void scr_clear(void)
{
resume_normal();
console_clear(console);
curscore = -1;
memset(curscreen, 0, sizeof(curscreen));
}
/*
* Set up screen
*/
void scr_init(void)
{
console_cursor_visibility(console, 0);
resume_normal();
scr_set();
}
void moveto(sysarg_t r, sysarg_t c)
{
console_flush(console);
console_set_pos(console, c, r);
}
winsize_t winsize;
static errno_t get_display_size(winsize_t *ws)
{
return console_get_size(console, &ws->ws_col, &ws->ws_row);
}
static void get_display_color_sup(bool *rgb, bool *color)
{
sysarg_t ccap;
errno_t rc = console_get_color_cap(console, &ccap);
if (rc != EOK) {
*rgb = false;
*color = false;
return;
}
if ((ccap & CONSOLE_CAP_CURSORCTL) == 0) {
stop("Your screen does not support cursor control.\n");
return;
}
*rgb = ((ccap & CONSOLE_CAP_RGB) == CONSOLE_CAP_RGB);
*color = ((ccap & CONSOLE_CAP_INDEXED) == CONSOLE_CAP_INDEXED);
}
/*
* 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;
}
get_display_color_sup(&use_rgb, &use_color);
if ((Rows < MINROWS) || (Cols < MINCOLS)) {
char smallscr[55];
snprintf(smallscr, sizeof(smallscr),
"the screen is too small (must be at least %dx%d)\n",
MINROWS, MINCOLS);
stop(smallscr);
}
isset = 1;
scr_clear();
}
/*
* End screen mode.
*/
void scr_end(void)
{
console_cursor_visibility(console, 1);
}
void stop(const char *why)
{
if (isset)
scr_end();
fprintf(stderr, "aborting: %s", why);
exit(1);
}
/*
* Update the screen.
*/
void scr_update(void)
{
cell *bp;
cell *sp;
cell so;
cell cur_so = 0;
int i;
int j;
int ccol;
/* 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(nextshape->color);
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(so);
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.
*/
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();
console_flush(console);
}
/*
* 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, bool set)
{
int l = str_size(s);
moveto(Rows - 2, ((Cols - l) >> 1) - 1);
if (set)
putstr(s);
else
while (--l >= 0)
(void) putchar(' ');
}
/** Sleep for the current turn time
*
* Eat any input that might be available.
*
*/
void tsleep(void)
{
usec_t timeout = fallrate;
errno_t rc;
while (timeout > 0) {
cons_event_t event;
rc = console_get_event_timeout(console, &event, &timeout);
if (rc == ETIMEOUT)
break;
if (rc != EOK)
exit(1);
}
}
/** Get char with timeout
*
*/
int tgetchar(void)
{
errno_t rc;
/*
* Reset timeleft to fallrate whenever it is not positive
* and increase speed.
*/
if (timeleft <= 0) {
faster();
timeleft = fallrate;
}
/*
* Wait to see if there is any input. If so, take it and
* update timeleft so that the next call to tgetchar()
* will not wait as long. If there is no input,
* make timeleft zero and return -1.
*/
char32_t c = 0;
while (c == 0) {
cons_event_t event;
rc = console_get_event_timeout(console, &event, &timeleft);
if (rc == ETIMEOUT) {
timeleft = 0;
return -1;
}
if (rc != EOK)
exit(1);
if (event.type == CEV_RESIZE)
size_changed = true;
if (event.type == CEV_KEY && event.ev.key.type == KEY_PRESS)
c = event.ev.key.c;
}
return (int) c;
}
/** Get char without timeout
*
*/
int twait(void)
{
char32_t c = 0;
errno_t rc;
while (c == 0) {
cons_event_t event;
rc = console_get_event(console, &event);
if (rc == ETIMEOUT)
return -1;
if (rc != EOK)
exit(1);
if (event.type == CEV_KEY && event.ev.key.type == KEY_PRESS)
c = event.ev.key.c;
}
return (int) c;
}
/** @}
*/