WebSVN – HelenOS – Diff – /trunk/uspace/app/tetris/screen.c


/*  $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 <console.h>
 
#include <async.h>
#include "screen.h"
#include "tetris.h"
#include <ipc/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 void start_standout(void)
{
    console_set_rgb_color(0xf0f0f0, 0);
}
 
static void resume_normal(void)
{
    console_set_rgb_color(0, 0xf0f0f0);
}
 
void clear_screen(void)
{
    console_clear();
    moveto(0, 0);
}
 
/*
 * Clear the screen, forgetting the current contents in the process.
 */
void
scr_clear(void)
{
 
    resume_normal();
    console_clear();
    curscore = -1;
    memset((char *)curscreen, 0, sizeof(curscreen));
}
 
/*
 * Set up screen
 */
void
scr_init(void)
{
    console_cursor_visibility(0);
 
    resume_normal();
    scr_clear();
}
 
void moveto(int r, int c)
{
    console_goto(r, c);
}
 
static void fflush(void)
{
    console_flush();
}
 
winsize_t winsize;
 
static int get_display_size(winsize_t *ws)
{
    return console_get_size(&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(' ');
}
 
/** @}
 */
 
 

Rev 3767	Rev 3768
1	/* $OpenBSD: screen.c,v 1.13 2006/04/20 03:25:36 ray Exp $ */	1	/* $OpenBSD: screen.c,v 1.13 2006/04/20 03:25:36 ray Exp $ */
2	/* $NetBSD: screen.c,v 1.4 1995/04/29 01:11:36 mycroft Exp $ */	2	/* $NetBSD: screen.c,v 1.4 1995/04/29 01:11:36 mycroft Exp $ */
3		3
4	/*-	4	/*-
5	* Copyright (c) 1992, 1993	5	* Copyright (c) 1992, 1993
6	* The Regents of the University of California. All rights reserved.	6	* The Regents of the University of California. All rights reserved.
7	*	7	*
8	* This code is derived from software contributed to Berkeley by	8	* This code is derived from software contributed to Berkeley by
9	* Chris Torek and Darren F. Provine.	9	* Chris Torek and Darren F. Provine.
10	*	10	*
11	* Redistribution and use in source and binary forms, with or without	11	* Redistribution and use in source and binary forms, with or without
12	* modification, are permitted provided that the following conditions	12	* modification, are permitted provided that the following conditions
13	* are met:	13	* are met:
14	* 1. Redistributions of source code must retain the above copyright	14	* 1. Redistributions of source code must retain the above copyright
15	* notice, this list of conditions and the following disclaimer.	15	* notice, this list of conditions and the following disclaimer.
16	* 2. Redistributions in binary form must reproduce the above copyright	16	* 2. Redistributions in binary form must reproduce the above copyright
17	* notice, this list of conditions and the following disclaimer in the	17	* notice, this list of conditions and the following disclaimer in the
18	* documentation and/or other materials provided with the distribution.	18	* documentation and/or other materials provided with the distribution.
19	* 3. Neither the name of the University nor the names of its contributors	19	* 3. Neither the name of the University nor the names of its contributors
20	* may be used to endorse or promote products derived from this software	20	* may be used to endorse or promote products derived from this software
21	* without specific prior written permission.	21	* without specific prior written permission.
22	*	22	*
23	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND	23	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE	24	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE	25	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE	26	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL	27	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS	28	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)	29	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT	30	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY	31	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF	32	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33	* SUCH DAMAGE.	33	* SUCH DAMAGE.
34	*	34	*
35	* @(#)screen.c 8.1 (Berkeley) 5/31/93	35	* @(#)screen.c 8.1 (Berkeley) 5/31/93
36	*/	36	*/
37		37
38	/** @addtogroup tetris	38	/** @addtogroup tetris
39	* @{	39	* @{
40	*/	40	*/
41	/** @file	41	/** @file
42	*/	42	*/
43		43
44	/*	44	/*
45	* Tetris screen control.	45	* Tetris screen control.
46	*/	46	*/
47		47
48	#include <err.h>	48	#include <err.h>
49	#include <stdio.h>	49	#include <stdio.h>
50	#include <stdlib.h>	50	#include <stdlib.h>
51	#include <string.h>	51	#include <string.h>
52	#include <unistd.h>	52	#include <unistd.h>
53	#include <io/stream.h>	-
54	#include <console.h>	53	#include <console.h>
55		54
56	#include <async.h>	55	#include <async.h>
57	#include "screen.h"	56	#include "screen.h"
58	#include "tetris.h"	57	#include "tetris.h"
59	#include <ipc/console.h>	58	#include <ipc/console.h>
60		59
61	static cell curscreen[B_SIZE]; /* 1 => standout (or otherwise marked) */	60	static cell curscreen[B_SIZE]; /* 1 => standout (or otherwise marked) */
62	static int curscore;	61	static int curscore;
63	static int isset; /* true => terminal is in game mode */	62	static int isset; /* true => terminal is in game mode */
64		63
65		64
66	/*	65	/*
67	* putstr() is for unpadded strings (either as in termcap(5) or	66	* putstr() is for unpadded strings (either as in termcap(5) or
68	* simply literal strings);	67	* simply literal strings);
69	*/	68	*/
70	static inline void putstr(char *s)	69	static inline void putstr(char *s)
71	{	70	{
72	while (*s)	71	while (*s)
73	putchar(*(s++));	72	putchar(*(s++));
74	}	73	}
75		74
76	static int con_phone;	-
77		-
78		-
79	static void start_standout(void)	75	static void start_standout(void)
80	{	76	{
81	console_set_rgb_color(0xf0f0f0, 0);	77	console_set_rgb_color(0xf0f0f0, 0);
82	}	78	}
83		79
84	static void resume_normal(void)	80	static void resume_normal(void)
85	{	81	{
86	console_set_rgb_color(0, 0xf0f0f0);	82	console_set_rgb_color(0, 0xf0f0f0);
87	}	83	}
88		84
89	void clear_screen(void)	85	void clear_screen(void)
90	{	86	{
91	async_msg_0(con_phone, CONSOLE_CLEAR);	87	console_clear();
92	moveto(0, 0);	88	moveto(0, 0);
93	}	89	}
94		90
95	/*	91	/*
96	* Clear the screen, forgetting the current contents in the process.	92	* Clear the screen, forgetting the current contents in the process.
97	*/	93	*/
98	void	94	void
99	scr_clear(void)	95	scr_clear(void)
100	{	96	{
101		97
102	resume_normal();	98	resume_normal();
103	async_msg_0(con_phone, CONSOLE_CLEAR);	99	console_clear();
104	curscore = -1;	100	curscore = -1;
105	memset((char *)curscreen, 0, sizeof(curscreen));	101	memset((char *)curscreen, 0, sizeof(curscreen));
106	}	102	}
107		103
108	/*	104	/*
109	* Set up screen	105	* Set up screen
110	*/	106	*/
111	void	107	void
112	scr_init(void)	108	scr_init(void)
113	{	109	{
114	con_phone = get_cons_phone();	110	console_cursor_visibility(0);
115	async_msg_1(con_phone, CONSOLE_CURSOR_VISIBILITY, 0);	-
116	resume_normal();	111	resume_normal();
117	scr_clear();	112	scr_clear();
118	}	113	}
119		114
120	void moveto(int r, int c)	115	void moveto(int r, int c)
121	{	116	{
122	async_msg_2(con_phone, CONSOLE_GOTO, r, c);	117	console_goto(r, c);
123	}	118	}
124		119
125	static void fflush(void)	120	static void fflush(void)
126	{	121	{
127	async_msg_0(con_phone, CONSOLE_FLUSH);	122	console_flush();
128	}	123	}
129		124
130	winsize_t winsize;	125	winsize_t winsize;
131		126
132	static int get_display_size(winsize_t *ws)	127	static int get_display_size(winsize_t *ws)
133	{	128	{
134	return async_req_0_2(con_phone, CONSOLE_GETSIZE, &ws->ws_row,	129	return console_get_size(&ws->ws_row, &ws->ws_col);
135	&ws->ws_col);	-
136	}	130	}
137		131
138	/*	132	/*
139	* Set up screen mode.	133	* Set up screen mode.
140	*/	134	*/
141	void	135	void
142	scr_set(void)	136	scr_set(void)
143	{	137	{
144	winsize_t ws;	138	winsize_t ws;
145		139
146	Rows = 0, Cols = 0;	140	Rows = 0, Cols = 0;
147	if (get_display_size(&ws) == 0) {	141	if (get_display_size(&ws) == 0) {
148	Rows = ws.ws_row;	142	Rows = ws.ws_row;
149	Cols = ws.ws_col;	143	Cols = ws.ws_col;
150	}	144	}
151	if (Rows < MINROWS \|\| Cols < MINCOLS) {	145	if (Rows < MINROWS \|\| Cols < MINCOLS) {
152	char smallscr[55];	146	char smallscr[55];
153		147
154	snprintf(smallscr, sizeof(smallscr),	148	snprintf(smallscr, sizeof(smallscr),
155	"the screen is too small (must be at least %dx%d)",	149	"the screen is too small (must be at least %dx%d)",
156	MINROWS, MINCOLS);	150	MINROWS, MINCOLS);
157	stop(smallscr);	151	stop(smallscr);
158	}	152	}
159	isset = 1;	153	isset = 1;
160		154
161	scr_clear();	155	scr_clear();
162	}	156	}
163		157
164	/*	158	/*
165	* End screen mode.	159	* End screen mode.
166	*/	160	*/
167	void	161	void
168	scr_end(void)	162	scr_end(void)
169	{	163	{
170	}	164	}
171		165
172	void	166	void
173	stop(char *why)	167	stop(char *why)
174	{	168	{
175		169
176	if (isset)	170	if (isset)
177	scr_end();	171	scr_end();
178	errx(1, "aborting: %s", why);	172	errx(1, "aborting: %s", why);
179	}	173	}
180		174
181		175
182	/*	176	/*
183	* Update the screen.	177	* Update the screen.
184	*/	178	*/
185	void	179	void
186	scr_update(void)	180	scr_update(void)
187	{	181	{
188	cell bp, sp;	182	cell bp, sp;
189	cell so, cur_so = 0;	183	cell so, cur_so = 0;
190	int i, ccol, j;	184	int i, ccol, j;
191	static const struct shape *lastshape;	185	static const struct shape *lastshape;
192		186
193	/* always leave cursor after last displayed point */	187	/* always leave cursor after last displayed point */
194	curscreen[D_LAST * B_COLS - 1] = -1;	188	curscreen[D_LAST * B_COLS - 1] = -1;
195		189
196	if (score != curscore) {	190	if (score != curscore) {
197	moveto(0, 0);	191	moveto(0, 0);
198	printf("Score: %d", score);	192	printf("Score: %d", score);
199	curscore = score;	193	curscore = score;
200	}	194	}
201		195
202	/* draw preview of next pattern */	196	/* draw preview of next pattern */
203	if (showpreview && (nextshape != lastshape)) {	197	if (showpreview && (nextshape != lastshape)) {
204	int i;	198	int i;
205	static int r=5, c=2;	199	static int r=5, c=2;
206	int tr, tc, t;	200	int tr, tc, t;
207		201
208	lastshape = nextshape;	202	lastshape = nextshape;
209		203
210	/* clean */	204	/* clean */
211	resume_normal();	205	resume_normal();
212	moveto(r-1, c-1); putstr(" ");	206	moveto(r-1, c-1); putstr(" ");
213	moveto(r, c-1); putstr(" ");	207	moveto(r, c-1); putstr(" ");
214	moveto(r+1, c-1); putstr(" ");	208	moveto(r+1, c-1); putstr(" ");
215	moveto(r+2, c-1); putstr(" ");	209	moveto(r+2, c-1); putstr(" ");
216		210
217	moveto(r-3, c-2);	211	moveto(r-3, c-2);
218	putstr("Next shape:");	212	putstr("Next shape:");
219		213
220	/* draw */	214	/* draw */
221	start_standout();	215	start_standout();
222	moveto(r, 2 * c);	216	moveto(r, 2 * c);
223	putstr(" ");	217	putstr(" ");
224	for (i = 0; i < 3; i++) {	218	for (i = 0; i < 3; i++) {
225	t = c + r * B_COLS;	219	t = c + r * B_COLS;
226	t += nextshape->off[i];	220	t += nextshape->off[i];
227		221
228	tr = t / B_COLS;	222	tr = t / B_COLS;
229	tc = t % B_COLS;	223	tc = t % B_COLS;
230		224
231	moveto(tr, 2*tc);	225	moveto(tr, 2*tc);
232	putstr(" ");	226	putstr(" ");
233	}	227	}
234	resume_normal();	228	resume_normal();
235	}	229	}
236		230
237	bp = &board[D_FIRST * B_COLS];	231	bp = &board[D_FIRST * B_COLS];
238	sp = &curscreen[D_FIRST * B_COLS];	232	sp = &curscreen[D_FIRST * B_COLS];
239	for (j = D_FIRST; j < D_LAST; j++) {	233	for (j = D_FIRST; j < D_LAST; j++) {
240	ccol = -1;	234	ccol = -1;
241	for (i = 0; i < B_COLS; bp++, sp++, i++) {	235	for (i = 0; i < B_COLS; bp++, sp++, i++) {
242	if (sp == (so = bp))	236	if (sp == (so = bp))
243	continue;	237	continue;
244	*sp = so;	238	*sp = so;
245	if (i != ccol) {	239	if (i != ccol) {
246	if (cur_so) {	240	if (cur_so) {
247	resume_normal();	241	resume_normal();
248	cur_so = 0;	242	cur_so = 0;
249	}	243	}
250	moveto(RTOD(j), CTOD(i));	244	moveto(RTOD(j), CTOD(i));
251	}	245	}
252	if (so != cur_so) {	246	if (so != cur_so) {
253	if (so)	247	if (so)
254	start_standout();	248	start_standout();
255	else	249	else
256	resume_normal();	250	resume_normal();
257	cur_so = so;	251	cur_so = so;
258	}	252	}
259	putstr(" ");	253	putstr(" ");
260		254
261	ccol = i + 1;	255	ccol = i + 1;
262	/*	256	/*
263	* Look ahead a bit, to avoid extra motion if	257	* Look ahead a bit, to avoid extra motion if
264	* we will be redrawing the cell after the next.	258	* we will be redrawing the cell after the next.
265	* Motion probably takes four or more characters,	259	* Motion probably takes four or more characters,
266	* so we save even if we rewrite two cells	260	* so we save even if we rewrite two cells
267	* `unnecessarily'. Skip it all, though, if	261	* `unnecessarily'. Skip it all, though, if
268	* the next cell is a different color.	262	* the next cell is a different color.
269	*/	263	*/
270	#define STOP (B_COLS - 3)	264	#define STOP (B_COLS - 3)
271	if (i > STOP \|\| sp[1] != bp[1] \|\| so != bp[1])	265	if (i > STOP \|\| sp[1] != bp[1] \|\| so != bp[1])
272	continue;	266	continue;
273	if (sp[2] != bp[2])	267	if (sp[2] != bp[2])
274	sp[1] = -1;	268	sp[1] = -1;
275	else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {	269	else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {
276	sp[2] = -1;	270	sp[2] = -1;
277	sp[1] = -1;	271	sp[1] = -1;
278	}	272	}
279	}	273	}
280	}	274	}
281	if (cur_so)	275	if (cur_so)
282	resume_normal();	276	resume_normal();
283	fflush();	277	fflush();
284	}	278	}
285		279
286	/*	280	/*
287	* Write a message (set!=0), or clear the same message (set==0).	281	* Write a message (set!=0), or clear the same message (set==0).
288	* (We need its length in case we have to overwrite with blanks.)	282	* (We need its length in case we have to overwrite with blanks.)
289	*/	283	*/
290	void	284	void
291	scr_msg(char *s, int set)	285	scr_msg(char *s, int set)
292	{	286	{
293		287
294	int l = strlen(s);	288	int l = strlen(s);
295		289
296	moveto(Rows - 2, ((Cols - l) >> 1) - 1);	290	moveto(Rows - 2, ((Cols - l) >> 1) - 1);
297	if (set)	291	if (set)
298	putstr(s);	292	putstr(s);
299	else	293	else
300	while (--l >= 0)	294	while (--l >= 0)
301	(void) putchar(' ');	295	(void) putchar(' ');
302	}	296	}
303		297
304	/** @}	298	/** @}
305	*/	299	*/
306		300
307		301

Subversion Repositories HelenOS

(root)/trunk/uspace/app/tetris/screen.c – Rev 3767 → 3768