WebSVN – HelenOS-historic – Diff – /uspace/trunk/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
 */
 
/*
 * 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 "../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 */
 
static void (*tstp)(int);
 
static void scr_stop(int);
static void stopset(int);
 
static char
        *CEstr;         /* clear to end of line */
 
 
/*
 * 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)
{
    send_call_2(con_phone, CONSOLE_SET_STYLE, fgcolor, bgcolor);
}
 
static void start_standout(void)
{
    set_style(0, 0xe0e0e0);
}
 
static void resume_normal(void)
{
    set_style(0xe0e0e0, 0);
}
 
/*
 * Clear the screen, forgetting the current contents in the process.
 */
void
scr_clear(void)
{
 
    resume_normal();
    send_call(con_phone, CONSOLE_CLEAR, 0);
    curscore = -1;
    memset((char *)curscreen, 0, sizeof(curscreen));
}
 
/*
 * Set up screen
 */
void
scr_init(void)
{
    con_phone = get_fd_phone(1);
    resume_normal();
    scr_clear();
}
 
static void moveto(int r, int c)
{
    send_call_2(con_phone, CONSOLE_GOTO, r, c);
}
 
static void fflush(void)
{
    send_call(con_phone, CONSOLE_FLUSH, 0);
}
 
struct winsize {
    ipcarg_t ws_row;
    ipcarg_t ws_col;
};
 
static int get_display_size(struct winsize *ws)
{
    return sync_send_2(con_phone, CONSOLE_GETSIZE, 0, 0, &ws->ws_row, &ws->ws_col);
}
 
static void
scr_stop(int sig)
{
 
    scr_end();
    scr_set();
    scr_msg(key_msg, 1);
}
 
/*
 * Set up screen mode.
 */
void
scr_set(void)
{
    struct winsize 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 1533	Rev 1551
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	/*	38	/*
39	* Tetris screen control.	39	* Tetris screen control.
40	*/	40	*/
41		41
42	#include <err.h>	42	#include <err.h>
43	#include <stdio.h>	43	#include <stdio.h>
44	#include <stdlib.h>	44	#include <stdlib.h>
45	#include <string.h>	45	#include <string.h>
46	#include <unistd.h>	46	#include <unistd.h>
47	#include <io/stream.h>	47	#include <io/stream.h>
48		48
49		49
50	#include <async.h>	50	#include <async.h>
51	#include "screen.h"	51	#include "screen.h"
52	#include "tetris.h"	52	#include "tetris.h"
53	#include "../console/console.h"	53	#include "../console/console.h"
54		54
55	static cell curscreen[B_SIZE]; /* 1 => standout (or otherwise marked) */	55	static cell curscreen[B_SIZE]; /* 1 => standout (or otherwise marked) */
56	static int curscore;	56	static int curscore;
57	static int isset; /* true => terminal is in game mode */	57	static int isset; /* true => terminal is in game mode */
58	static struct termios oldtt;	-
59	static void (*tstp)(int);	58	static void (*tstp)(int);
60		59
61	static void scr_stop(int);	60	static void scr_stop(int);
62	static void stopset(int);	61	static void stopset(int);
63		62
64	static char	63	static char
65	CEstr; / clear to end of line */	64	CEstr; / clear to end of line */
66		65
67		66
68	/*	67	/*
69	* putstr() is for unpadded strings (either as in termcap(5) or	68	* putstr() is for unpadded strings (either as in termcap(5) or
70	* simply literal strings);	69	* simply literal strings);
71	*/	70	*/
72	static inline void putstr(char *s)	71	static inline void putstr(char *s)
73	{	72	{
74	while (*s)	73	while (*s)
75	putchar(*(s++));	74	putchar(*(s++));
76	}	75	}
77		76
78	static int con_phone;	77	static int con_phone;
79		78
80		79
81		80
82	static void set_style(int fgcolor, int bgcolor)	81	static void set_style(int fgcolor, int bgcolor)
83	{	82	{
84	send_call_2(con_phone, CONSOLE_SET_STYLE, fgcolor, bgcolor);	83	send_call_2(con_phone, CONSOLE_SET_STYLE, fgcolor, bgcolor);
85	}	84	}
86		85
87	static void start_standout(void)	86	static void start_standout(void)
88	{	87	{
89	set_style(0, 0xe0e0e0);	88	set_style(0, 0xe0e0e0);
90	}	89	}
91		90
92	static void resume_normal(void)	91	static void resume_normal(void)
93	{	92	{
94	set_style(0xe0e0e0, 0);	93	set_style(0xe0e0e0, 0);
95	}	94	}
96		95
97	/*	96	/*
98	* Clear the screen, forgetting the current contents in the process.	97	* Clear the screen, forgetting the current contents in the process.
99	*/	98	*/
100	void	99	void
101	scr_clear(void)	100	scr_clear(void)
102	{	101	{
103		102
104	resume_normal();	103	resume_normal();
105	send_call(con_phone, CONSOLE_CLEAR, 0);	104	send_call(con_phone, CONSOLE_CLEAR, 0);
106	curscore = -1;	105	curscore = -1;
107	memset((char *)curscreen, 0, sizeof(curscreen));	106	memset((char *)curscreen, 0, sizeof(curscreen));
108	}	107	}
109		108
110	/*	109	/*
111	* Set up screen	110	* Set up screen
112	*/	111	*/
113	void	112	void
114	scr_init(void)	113	scr_init(void)
115	{	114	{
116	con_phone = get_fd_phone(1);	115	con_phone = get_fd_phone(1);
117	resume_normal();	116	resume_normal();
118	scr_clear();	117	scr_clear();
119	}	118	}
120		119
121	static void moveto(int r, int c)	120	static void moveto(int r, int c)
122	{	121	{
123	send_call_2(con_phone, CONSOLE_GOTO, r, c);	122	send_call_2(con_phone, CONSOLE_GOTO, r, c);
124	}	123	}
125		124
126	static void fflush(void)	125	static void fflush(void)
127	{	126	{
128	send_call(con_phone, CONSOLE_FLUSH, 0);	127	send_call(con_phone, CONSOLE_FLUSH, 0);
129	}	128	}
130		129
131	struct winsize {	130	struct winsize {
132	ipcarg_t ws_row;	131	ipcarg_t ws_row;
133	ipcarg_t ws_col;	132	ipcarg_t ws_col;
134	};	133	};
135		134
136	static int get_display_size(struct winsize *ws)	135	static int get_display_size(struct winsize *ws)
137	{	136	{
138	return sync_send_2(con_phone, CONSOLE_GETSIZE, 0, 0, &ws->ws_row, &ws->ws_col);	137	return sync_send_2(con_phone, CONSOLE_GETSIZE, 0, 0, &ws->ws_row, &ws->ws_col);
139	}	138	}
140		139
141	static void	140	static void
142	scr_stop(int sig)	141	scr_stop(int sig)
143	{	142	{
144		143
145	scr_end();	144	scr_end();
146	scr_set();	145	scr_set();
147	scr_msg(key_msg, 1);	146	scr_msg(key_msg, 1);
148	}	147	}
149		148
150	/*	149	/*
151	* Set up screen mode.	150	* Set up screen mode.
152	*/	151	*/
153	void	152	void
154	scr_set(void)	153	scr_set(void)
155	{	154	{
156	struct winsize ws;	155	struct winsize ws;
157		156
158	Rows = 0, Cols = 0;	157	Rows = 0, Cols = 0;
159	if (get_display_size(&ws) == 0) {	158	if (get_display_size(&ws) == 0) {
160	Rows = ws.ws_row;	159	Rows = ws.ws_row;
161	Cols = ws.ws_col;	160	Cols = ws.ws_col;
162	}	161	}
163	if (Rows < MINROWS \|\| Cols < MINCOLS) {	162	if (Rows < MINROWS \|\| Cols < MINCOLS) {
164	char smallscr[55];	163	char smallscr[55];
165		164
166	snprintf(smallscr, sizeof(smallscr),	165	snprintf(smallscr, sizeof(smallscr),
167	"the screen is too small (must be at least %dx%d)",	166	"the screen is too small (must be at least %dx%d)",
168	MINROWS, MINCOLS);	167	MINROWS, MINCOLS);
169	stop(smallscr);	168	stop(smallscr);
170	}	169	}
171	isset = 1;	170	isset = 1;
172		171
173	scr_clear();	172	scr_clear();
174	}	173	}
175		174
176	/*	175	/*
177	* End screen mode.	176	* End screen mode.
178	*/	177	*/
179	void	178	void
180	scr_end(void)	179	scr_end(void)
181	{	180	{
182	}	181	}
183		182
184	void	183	void
185	stop(char *why)	184	stop(char *why)
186	{	185	{
187		186
188	if (isset)	187	if (isset)
189	scr_end();	188	scr_end();
190	errx(1, "aborting: %s", why);	189	errx(1, "aborting: %s", why);
191	}	190	}
192		191
193		192
194	/*	193	/*
195	* Update the screen.	194	* Update the screen.
196	*/	195	*/
197	void	196	void
198	scr_update(void)	197	scr_update(void)
199	{	198	{
200	cell bp, sp;	199	cell bp, sp;
201	cell so, cur_so = 0;	200	cell so, cur_so = 0;
202	int i, ccol, j;	201	int i, ccol, j;
203	static const struct shape *lastshape;	202	static const struct shape *lastshape;
204		203
205	/* always leave cursor after last displayed point */	204	/* always leave cursor after last displayed point */
206	curscreen[D_LAST * B_COLS - 1] = -1;	205	curscreen[D_LAST * B_COLS - 1] = -1;
207		206
208	if (score != curscore) {	207	if (score != curscore) {
209	moveto(0, 0);	208	moveto(0, 0);
210	printf("Score: %d", score);	209	printf("Score: %d", score);
211	curscore = score;	210	curscore = score;
212	}	211	}
213		212
214	/* draw preview of next pattern */	213	/* draw preview of next pattern */
215	if (showpreview && (nextshape != lastshape)) {	214	if (showpreview && (nextshape != lastshape)) {
216	int i;	215	int i;
217	static int r=5, c=2;	216	static int r=5, c=2;
218	int tr, tc, t;	217	int tr, tc, t;
219		218
220	lastshape = nextshape;	219	lastshape = nextshape;
221		220
222	/* clean */	221	/* clean */
223	resume_normal();	222	resume_normal();
224	moveto(r-1, c-1); putstr(" ");	223	moveto(r-1, c-1); putstr(" ");
225	moveto(r, c-1); putstr(" ");	224	moveto(r, c-1); putstr(" ");
226	moveto(r+1, c-1); putstr(" ");	225	moveto(r+1, c-1); putstr(" ");
227	moveto(r+2, c-1); putstr(" ");	226	moveto(r+2, c-1); putstr(" ");
228		227
229	moveto(r-3, c-2);	228	moveto(r-3, c-2);
230	putstr("Next shape:");	229	putstr("Next shape:");
231		230
232	/* draw */	231	/* draw */
233	start_standout();	232	start_standout();
234	moveto(r, 2 * c);	233	moveto(r, 2 * c);
235	putstr(" ");	234	putstr(" ");
236	for (i = 0; i < 3; i++) {	235	for (i = 0; i < 3; i++) {
237	t = c + r * B_COLS;	236	t = c + r * B_COLS;
238	t += nextshape->off[i];	237	t += nextshape->off[i];
239		238
240	tr = t / B_COLS;	239	tr = t / B_COLS;
241	tc = t % B_COLS;	240	tc = t % B_COLS;
242		241
243	moveto(tr, 2*tc);	242	moveto(tr, 2*tc);
244	putstr(" ");	243	putstr(" ");
245	}	244	}
246	resume_normal();	245	resume_normal();
247	}	246	}
248		247
249	bp = &board[D_FIRST * B_COLS];	248	bp = &board[D_FIRST * B_COLS];
250	sp = &curscreen[D_FIRST * B_COLS];	249	sp = &curscreen[D_FIRST * B_COLS];
251	for (j = D_FIRST; j < D_LAST; j++) {	250	for (j = D_FIRST; j < D_LAST; j++) {
252	ccol = -1;	251	ccol = -1;
253	for (i = 0; i < B_COLS; bp++, sp++, i++) {	252	for (i = 0; i < B_COLS; bp++, sp++, i++) {
254	if (sp == (so = bp))	253	if (sp == (so = bp))
255	continue;	254	continue;
256	*sp = so;	255	*sp = so;
257	if (i != ccol) {	256	if (i != ccol) {
258	if (cur_so) {	257	if (cur_so) {
259	resume_normal();	258	resume_normal();
260	cur_so = 0;	259	cur_so = 0;
261	}	260	}
262	moveto(RTOD(j), CTOD(i));	261	moveto(RTOD(j), CTOD(i));
263	}	262	}
264	if (so != cur_so) {	263	if (so != cur_so) {
265	if (so)	264	if (so)
266	start_standout();	265	start_standout();
267	else	266	else
268	resume_normal();	267	resume_normal();
269	cur_so = so;	268	cur_so = so;
270	}	269	}
271	putstr(" ");	270	putstr(" ");
272		271
273	ccol = i + 1;	272	ccol = i + 1;
274	/*	273	/*
275	* Look ahead a bit, to avoid extra motion if	274	* Look ahead a bit, to avoid extra motion if
276	* we will be redrawing the cell after the next.	275	* we will be redrawing the cell after the next.
277	* Motion probably takes four or more characters,	276	* Motion probably takes four or more characters,
278	* so we save even if we rewrite two cells	277	* so we save even if we rewrite two cells
279	* `unnecessarily'. Skip it all, though, if	278	* `unnecessarily'. Skip it all, though, if
280	* the next cell is a different color.	279	* the next cell is a different color.
281	*/	280	*/
282	#define STOP (B_COLS - 3)	281	#define STOP (B_COLS - 3)
283	if (i > STOP \|\| sp[1] != bp[1] \|\| so != bp[1])	282	if (i > STOP \|\| sp[1] != bp[1] \|\| so != bp[1])
284	continue;	283	continue;
285	if (sp[2] != bp[2])	284	if (sp[2] != bp[2])
286	sp[1] = -1;	285	sp[1] = -1;
287	else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {	286	else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {
288	sp[2] = -1;	287	sp[2] = -1;
289	sp[1] = -1;	288	sp[1] = -1;
290	}	289	}
291	}	290	}
292	}	291	}
293	if (cur_so)	292	if (cur_so)
294	resume_normal();	293	resume_normal();
295	fflush();	294	fflush();
296	}	295	}
297		296
298	/*	297	/*
299	* Write a message (set!=0), or clear the same message (set==0).	298	* Write a message (set!=0), or clear the same message (set==0).
300	* (We need its length in case we have to overwrite with blanks.)	299	* (We need its length in case we have to overwrite with blanks.)
301	*/	300	*/
302	void	301	void
303	scr_msg(char *s, int set)	302	scr_msg(char *s, int set)
304	{	303	{
305		304
306	int l = strlen(s);	305	int l = strlen(s);
307		306
308	moveto(Rows - 2, ((Cols - l) >> 1) - 1);	307	moveto(Rows - 2, ((Cols - l) >> 1) - 1);
309	if (set)	308	if (set)
310	putstr(s);	309	putstr(s);
311	else	310	else
312	while (--l >= 0)	311	while (--l >= 0)
313	(void) putchar(' ');	312	(void) putchar(' ');
314	}	313	}
315		314

Subversion Repositories HelenOS-historic

(root)/uspace/trunk/tetris/screen.c – Rev 1533 → 1551