WebSVN – HelenOS – Diff – /branches/network/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 <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(' ');
}
 
/** @}
 */
 
 

Rev 2479	Rev 2621
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>	53	#include <io/stream.h>
54		54
55		55
56	#include <async.h>	56	#include <async.h>
57	#include "screen.h"	57	#include "screen.h"
58	#include "tetris.h"	58	#include "tetris.h"
59	#include "../../srv/console/console.h"	59	#include "../../srv/console/console.h"
60		60
61	static cell curscreen[B_SIZE]; /* 1 => standout (or otherwise marked) */	61	static cell curscreen[B_SIZE]; /* 1 => standout (or otherwise marked) */
62	static int curscore;	62	static int curscore;
63	static int isset; /* true => terminal is in game mode */	63	static int isset; /* true => terminal is in game mode */
64		64
65		65
66	/*	66	/*
67	* putstr() is for unpadded strings (either as in termcap(5) or	67	* putstr() is for unpadded strings (either as in termcap(5) or
68	* simply literal strings);	68	* simply literal strings);
69	*/	69	*/
70	static inline void putstr(char *s)	70	static inline void putstr(char *s)
71	{	71	{
72	while (*s)	72	while (*s)
73	putchar(*(s++));	73	putchar(*(s++));
74	}	74	}
75		75
76	static int con_phone;	76	static int con_phone;
77		77
78		78
79		79
80	static void set_style(int fgcolor, int bgcolor)	80	static void set_style(int fgcolor, int bgcolor)
81	{	81	{
82	async_msg_2(con_phone, CONSOLE_SET_STYLE, fgcolor, bgcolor);	82	async_msg_2(con_phone, CONSOLE_SET_STYLE, fgcolor, bgcolor);
83	}	83	}
84		84
85	static void start_standout(void)	85	static void start_standout(void)
86	{	86	{
87	set_style(0xf0f0f0, 0);	87	set_style(0xf0f0f0, 0);
88	}	88	}
89		89
90	static void resume_normal(void)	90	static void resume_normal(void)
91	{	91	{
92	set_style(0, 0xf0f0f0);	92	set_style(0, 0xf0f0f0);
93	}	93	}
94		94
95		95
96	void clear_screen(void)	96	void clear_screen(void)
97	{	97	{
98	async_msg(con_phone, CONSOLE_CLEAR, 0);	98	async_msg_0(con_phone, CONSOLE_CLEAR);
99	moveto(0,0);	99	moveto(0, 0);
100	}	100	}
101		101
102	/*	102	/*
103	* Clear the screen, forgetting the current contents in the process.	103	* Clear the screen, forgetting the current contents in the process.
104	*/	104	*/
105	void	105	void
106	scr_clear(void)	106	scr_clear(void)
107	{	107	{
108		108
109	resume_normal();	109	resume_normal();
110	async_msg(con_phone, CONSOLE_CLEAR, 0);	110	async_msg_0(con_phone, CONSOLE_CLEAR);
111	curscore = -1;	111	curscore = -1;
112	memset((char *)curscreen, 0, sizeof(curscreen));	112	memset((char *)curscreen, 0, sizeof(curscreen));
113	}	113	}
114		114
115	/*	115	/*
116	* Set up screen	116	* Set up screen
117	*/	117	*/
118	void	118	void
119	scr_init(void)	119	scr_init(void)
120	{	120	{
121	con_phone = get_fd_phone(1);	121	con_phone = get_fd_phone(1);
122	async_msg(con_phone, CONSOLE_CURSOR_VISIBILITY, 0);	122	async_msg_1(con_phone, CONSOLE_CURSOR_VISIBILITY, 0);
123	resume_normal();	123	resume_normal();
124	scr_clear();	124	scr_clear();
125	}	125	}
126		126
127	void moveto(int r, int c)	127	void moveto(int r, int c)
128	{	128	{
129	async_msg_2(con_phone, CONSOLE_GOTO, r, c);	129	async_msg_2(con_phone, CONSOLE_GOTO, r, c);
130	}	130	}
131		131
132	static void fflush(void)	132	static void fflush(void)
133	{	133	{
134	async_msg(con_phone, CONSOLE_FLUSH, 0);	134	async_msg_0(con_phone, CONSOLE_FLUSH);
135	}	135	}
136		136
137	winsize_t winsize;	137	winsize_t winsize;
138		138
139	static int get_display_size(winsize_t *ws)	139	static int get_display_size(winsize_t *ws)
140	{	140	{
141	return async_req_2(con_phone, CONSOLE_GETSIZE, 0, 0, &ws->ws_row, &ws->ws_col);	141	return async_req_0_2(con_phone, CONSOLE_GETSIZE, &ws->ws_row,
-		142	&ws->ws_col);
142	}	143	}
143		144
144	/*	145	/*
145	* Set up screen mode.	146	* Set up screen mode.
146	*/	147	*/
147	void	148	void
148	scr_set(void)	149	scr_set(void)
149	{	150	{
150	winsize_t ws;	151	winsize_t ws;
151		152
152	Rows = 0, Cols = 0;	153	Rows = 0, Cols = 0;
153	if (get_display_size(&ws) == 0) {	154	if (get_display_size(&ws) == 0) {
154	Rows = ws.ws_row;	155	Rows = ws.ws_row;
155	Cols = ws.ws_col;	156	Cols = ws.ws_col;
156	}	157	}
157	if (Rows < MINROWS \|\| Cols < MINCOLS) {	158	if (Rows < MINROWS \|\| Cols < MINCOLS) {
158	char smallscr[55];	159	char smallscr[55];
159		160
160	snprintf(smallscr, sizeof(smallscr),	161	snprintf(smallscr, sizeof(smallscr),
161	"the screen is too small (must be at least %dx%d)",	162	"the screen is too small (must be at least %dx%d)",
162	MINROWS, MINCOLS);	163	MINROWS, MINCOLS);
163	stop(smallscr);	164	stop(smallscr);
164	}	165	}
165	isset = 1;	166	isset = 1;
166		167
167	scr_clear();	168	scr_clear();
168	}	169	}
169		170
170	/*	171	/*
171	* End screen mode.	172	* End screen mode.
172	*/	173	*/
173	void	174	void
174	scr_end(void)	175	scr_end(void)
175	{	176	{
176	}	177	}
177		178
178	void	179	void
179	stop(char *why)	180	stop(char *why)
180	{	181	{
181		182
182	if (isset)	183	if (isset)
183	scr_end();	184	scr_end();
184	errx(1, "aborting: %s", why);	185	errx(1, "aborting: %s", why);
185	}	186	}
186		187
187		188
188	/*	189	/*
189	* Update the screen.	190	* Update the screen.
190	*/	191	*/
191	void	192	void
192	scr_update(void)	193	scr_update(void)
193	{	194	{
194	cell bp, sp;	195	cell bp, sp;
195	cell so, cur_so = 0;	196	cell so, cur_so = 0;
196	int i, ccol, j;	197	int i, ccol, j;
197	static const struct shape *lastshape;	198	static const struct shape *lastshape;
198		199
199	/* always leave cursor after last displayed point */	200	/* always leave cursor after last displayed point */
200	curscreen[D_LAST * B_COLS - 1] = -1;	201	curscreen[D_LAST * B_COLS - 1] = -1;
201		202
202	if (score != curscore) {	203	if (score != curscore) {
203	moveto(0, 0);	204	moveto(0, 0);
204	printf("Score: %d", score);	205	printf("Score: %d", score);
205	curscore = score;	206	curscore = score;
206	}	207	}
207		208
208	/* draw preview of next pattern */	209	/* draw preview of next pattern */
209	if (showpreview && (nextshape != lastshape)) {	210	if (showpreview && (nextshape != lastshape)) {
210	int i;	211	int i;
211	static int r=5, c=2;	212	static int r=5, c=2;
212	int tr, tc, t;	213	int tr, tc, t;
213		214
214	lastshape = nextshape;	215	lastshape = nextshape;
215		216
216	/* clean */	217	/* clean */
217	resume_normal();	218	resume_normal();
218	moveto(r-1, c-1); putstr(" ");	219	moveto(r-1, c-1); putstr(" ");
219	moveto(r, c-1); putstr(" ");	220	moveto(r, c-1); putstr(" ");
220	moveto(r+1, c-1); putstr(" ");	221	moveto(r+1, c-1); putstr(" ");
221	moveto(r+2, c-1); putstr(" ");	222	moveto(r+2, c-1); putstr(" ");
222		223
223	moveto(r-3, c-2);	224	moveto(r-3, c-2);
224	putstr("Next shape:");	225	putstr("Next shape:");
225		226
226	/* draw */	227	/* draw */
227	start_standout();	228	start_standout();
228	moveto(r, 2 * c);	229	moveto(r, 2 * c);
229	putstr(" ");	230	putstr(" ");
230	for (i = 0; i < 3; i++) {	231	for (i = 0; i < 3; i++) {
231	t = c + r * B_COLS;	232	t = c + r * B_COLS;
232	t += nextshape->off[i];	233	t += nextshape->off[i];
233		234
234	tr = t / B_COLS;	235	tr = t / B_COLS;
235	tc = t % B_COLS;	236	tc = t % B_COLS;
236		237
237	moveto(tr, 2*tc);	238	moveto(tr, 2*tc);
238	putstr(" ");	239	putstr(" ");
239	}	240	}
240	resume_normal();	241	resume_normal();
241	}	242	}
242		243
243	bp = &board[D_FIRST * B_COLS];	244	bp = &board[D_FIRST * B_COLS];
244	sp = &curscreen[D_FIRST * B_COLS];	245	sp = &curscreen[D_FIRST * B_COLS];
245	for (j = D_FIRST; j < D_LAST; j++) {	246	for (j = D_FIRST; j < D_LAST; j++) {
246	ccol = -1;	247	ccol = -1;
247	for (i = 0; i < B_COLS; bp++, sp++, i++) {	248	for (i = 0; i < B_COLS; bp++, sp++, i++) {
248	if (sp == (so = bp))	249	if (sp == (so = bp))
249	continue;	250	continue;
250	*sp = so;	251	*sp = so;
251	if (i != ccol) {	252	if (i != ccol) {
252	if (cur_so) {	253	if (cur_so) {
253	resume_normal();	254	resume_normal();
254	cur_so = 0;	255	cur_so = 0;
255	}	256	}
256	moveto(RTOD(j), CTOD(i));	257	moveto(RTOD(j), CTOD(i));
257	}	258	}
258	if (so != cur_so) {	259	if (so != cur_so) {
259	if (so)	260	if (so)
260	start_standout();	261	start_standout();
261	else	262	else
262	resume_normal();	263	resume_normal();
263	cur_so = so;	264	cur_so = so;
264	}	265	}
265	putstr(" ");	266	putstr(" ");
266		267
267	ccol = i + 1;	268	ccol = i + 1;
268	/*	269	/*
269	* Look ahead a bit, to avoid extra motion if	270	* Look ahead a bit, to avoid extra motion if
270	* we will be redrawing the cell after the next.	271	* we will be redrawing the cell after the next.
271	* Motion probably takes four or more characters,	272	* Motion probably takes four or more characters,
272	* so we save even if we rewrite two cells	273	* so we save even if we rewrite two cells
273	* `unnecessarily'. Skip it all, though, if	274	* `unnecessarily'. Skip it all, though, if
274	* the next cell is a different color.	275	* the next cell is a different color.
275	*/	276	*/
276	#define STOP (B_COLS - 3)	277	#define STOP (B_COLS - 3)
277	if (i > STOP \|\| sp[1] != bp[1] \|\| so != bp[1])	278	if (i > STOP \|\| sp[1] != bp[1] \|\| so != bp[1])
278	continue;	279	continue;
279	if (sp[2] != bp[2])	280	if (sp[2] != bp[2])
280	sp[1] = -1;	281	sp[1] = -1;
281	else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {	282	else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {
282	sp[2] = -1;	283	sp[2] = -1;
283	sp[1] = -1;	284	sp[1] = -1;
284	}	285	}
285	}	286	}
286	}	287	}
287	if (cur_so)	288	if (cur_so)
288	resume_normal();	289	resume_normal();
289	fflush();	290	fflush();
290	}	291	}
291		292
292	/*	293	/*
293	* Write a message (set!=0), or clear the same message (set==0).	294	* Write a message (set!=0), or clear the same message (set==0).
294	* (We need its length in case we have to overwrite with blanks.)	295	* (We need its length in case we have to overwrite with blanks.)
295	*/	296	*/
296	void	297	void
297	scr_msg(char *s, int set)	298	scr_msg(char *s, int set)
298	{	299	{
299		300
300	int l = strlen(s);	301	int l = strlen(s);
301		302
302	moveto(Rows - 2, ((Cols - l) >> 1) - 1);	303	moveto(Rows - 2, ((Cols - l) >> 1) - 1);
303	if (set)	304	if (set)
304	putstr(s);	305	putstr(s);
305	else	306	else
306	while (--l >= 0)	307	while (--l >= 0)
307	(void) putchar(' ');	308	(void) putchar(' ');
308	}	309	}
309		310
310	/** @}	311	/** @}
311	*/	312	*/
312		313
313		314

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(root)/branches/network/uspace/app/tetris/screen.c @ 4718 – Rev 2479 → 2621