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 struct termios oldtt;
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 1532	Rev 1533
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;	58	static struct termios oldtt;
59	static void (*tstp)(int);	59	static void (*tstp)(int);
60		60
61	static void scr_stop(int);	61	static void scr_stop(int);
62	static void stopset(int);	62	static void stopset(int);
63		63
64	static char	64	static char
65	CEstr; / clear to end of line */	65	CEstr; / clear to end of line */
66		66
67		67
68	/*	68	/*
69	* putstr() is for unpadded strings (either as in termcap(5) or	69	* putstr() is for unpadded strings (either as in termcap(5) or
70	* simply literal strings);	70	* simply literal strings);
71	*/	71	*/
72	#define putstr(s) puts(s)	72	static inline void putstr(char *s)
-		73	{
-		74	while (*s)
-		75	putchar(*(s++));
-		76	}
73		77
74	static int con_phone;	78	static int con_phone;
75		79
76		80
77		81
78	static void set_style(int fgcolor, int bgcolor)	82	static void set_style(int fgcolor, int bgcolor)
79	{	83	{
80	send_call_2(con_phone, CONSOLE_SET_STYLE, fgcolor, bgcolor);	84	send_call_2(con_phone, CONSOLE_SET_STYLE, fgcolor, bgcolor);
81	}	85	}
82		86
83	static void start_standout(void)	87	static void start_standout(void)
84	{	88	{
85	set_style(0, 0xe0e0e0);	89	set_style(0, 0xe0e0e0);
86	}	90	}
87		91
88	static void resume_normal(void)	92	static void resume_normal(void)
89	{	93	{
90	set_style(0xe0e0e0, 0);	94	set_style(0xe0e0e0, 0);
91	}	95	}
92		96
93	/*	97	/*
94	* Clear the screen, forgetting the current contents in the process.	98	* Clear the screen, forgetting the current contents in the process.
95	*/	99	*/
96	void	100	void
97	scr_clear(void)	101	scr_clear(void)
98	{	102	{
99		103
100	resume_normal();	104	resume_normal();
101	send_call(con_phone, CONSOLE_CLEAR, 0);	105	send_call(con_phone, CONSOLE_CLEAR, 0);
102	curscore = -1;	106	curscore = -1;
103	memset((char *)curscreen, 0, sizeof(curscreen));	107	memset((char *)curscreen, 0, sizeof(curscreen));
104	}	108	}
105		109
106	/*	110	/*
107	* Set up screen	111	* Set up screen
108	*/	112	*/
109	void	113	void
110	scr_init(void)	114	scr_init(void)
111	{	115	{
112	con_phone = get_fd_phone(1);	116	con_phone = get_fd_phone(1);
113	resume_normal();	117	resume_normal();
114	scr_clear();	118	scr_clear();
115	}	119	}
116		120
117	static void moveto(int r, int c)	121	static void moveto(int r, int c)
118	{	122	{
119	send_call_2(con_phone, CONSOLE_GOTO, r, c);	123	send_call_2(con_phone, CONSOLE_GOTO, r, c);
120	}	124	}
121		125
122	static void fflush(void)	126	static void fflush(void)
123	{	127	{
124	send_call(con_phone, CONSOLE_FLUSH, 0);	128	send_call(con_phone, CONSOLE_FLUSH, 0);
125	}	129	}
126		130
127	struct winsize {	131	struct winsize {
128	ipcarg_t ws_row;	132	ipcarg_t ws_row;
129	ipcarg_t ws_col;	133	ipcarg_t ws_col;
130	};	134	};
131		135
132	static int get_display_size(struct winsize *ws)	136	static int get_display_size(struct winsize *ws)
133	{	137	{
134	return sync_send_2(con_phone, CONSOLE_GETSIZE, 0, 0, &ws->ws_row, &ws->ws_col);	138	return sync_send_2(con_phone, CONSOLE_GETSIZE, 0, 0, &ws->ws_row, &ws->ws_col);
135	}	139	}
136		140
137	static void	141	static void
138	scr_stop(int sig)	142	scr_stop(int sig)
139	{	143	{
140		144
141	scr_end();	145	scr_end();
142	scr_set();	146	scr_set();
143	scr_msg(key_msg, 1);	147	scr_msg(key_msg, 1);
144	}	148	}
145		149
146	/*	150	/*
147	* Set up screen mode.	151	* Set up screen mode.
148	*/	152	*/
149	void	153	void
150	scr_set(void)	154	scr_set(void)
151	{	155	{
152	struct winsize ws;	156	struct winsize ws;
153		157
154	Rows = 0, Cols = 0;	158	Rows = 0, Cols = 0;
155	if (get_display_size(&ws) == 0) {	159	if (get_display_size(&ws) == 0) {
156	Rows = ws.ws_row;	160	Rows = ws.ws_row;
157	Cols = ws.ws_col;	161	Cols = ws.ws_col;
158	}	162	}
159	if (Rows < MINROWS \|\| Cols < MINCOLS) {	163	if (Rows < MINROWS \|\| Cols < MINCOLS) {
160	char smallscr[55];	164	char smallscr[55];
161		165
162	snprintf(smallscr, sizeof(smallscr),	166	snprintf(smallscr, sizeof(smallscr),
163	"the screen is too small (must be at least %dx%d)",	167	"the screen is too small (must be at least %dx%d)",
164	MINROWS, MINCOLS);	168	MINROWS, MINCOLS);
165	stop(smallscr);	169	stop(smallscr);
166	}	170	}
167	isset = 1;	171	isset = 1;
168		172
169	scr_clear();	173	scr_clear();
170	}	174	}
171		175
172	/*	176	/*
173	* End screen mode.	177	* End screen mode.
174	*/	178	*/
175	void	179	void
176	scr_end(void)	180	scr_end(void)
177	{	181	{
178	}	182	}
179		183
180	void	184	void
181	stop(char *why)	185	stop(char *why)
182	{	186	{
183		187
184	if (isset)	188	if (isset)
185	scr_end();	189	scr_end();
186	errx(1, "aborting: %s", why);	190	errx(1, "aborting: %s", why);
187	}	191	}
188		192
189		193
190	/*	194	/*
191	* Update the screen.	195	* Update the screen.
192	*/	196	*/
193	void	197	void
194	scr_update(void)	198	scr_update(void)
195	{	199	{
196	cell bp, sp;	200	cell bp, sp;
197	cell so, cur_so = 0;	201	cell so, cur_so = 0;
198	int i, ccol, j;	202	int i, ccol, j;
199	static const struct shape *lastshape;	203	static const struct shape *lastshape;
200		204
201	/* always leave cursor after last displayed point */	205	/* always leave cursor after last displayed point */
202	curscreen[D_LAST * B_COLS - 1] = -1;	206	curscreen[D_LAST * B_COLS - 1] = -1;
203		207
204	if (score != curscore) {	208	if (score != curscore) {
205	moveto(0, 0);	209	moveto(0, 0);
206	printf("Score: %d", score);	210	printf("Score: %d", score);
207	curscore = score;	211	curscore = score;
208	}	212	}
209		213
210	/* draw preview of next pattern */	214	/* draw preview of next pattern */
211	if (showpreview && (nextshape != lastshape)) {	215	if (showpreview && (nextshape != lastshape)) {
212	int i;	216	int i;
213	static int r=5, c=2;	217	static int r=5, c=2;
214	int tr, tc, t;	218	int tr, tc, t;
215		219
216	lastshape = nextshape;	220	lastshape = nextshape;
217		221
218	/* clean */	222	/* clean */
219	resume_normal();	223	resume_normal();
220	moveto(r-1, c-1); putstr(" ");	224	moveto(r-1, c-1); putstr(" ");
221	moveto(r, c-1); putstr(" ");	225	moveto(r, c-1); putstr(" ");
222	moveto(r+1, c-1); putstr(" ");	226	moveto(r+1, c-1); putstr(" ");
223	moveto(r+2, c-1); putstr(" ");	227	moveto(r+2, c-1); putstr(" ");
224		228
225	moveto(r-3, c-2);	229	moveto(r-3, c-2);
226	putstr("Next shape:");	230	putstr("Next shape:");
227		231
228	/* draw */	232	/* draw */
229	start_standout();	233	start_standout();
230	moveto(r, 2 * c);	234	moveto(r, 2 * c);
231	putstr(" ");	235	putstr(" ");
232	for (i = 0; i < 3; i++) {	236	for (i = 0; i < 3; i++) {
233	t = c + r * B_COLS;	237	t = c + r * B_COLS;
234	t += nextshape->off[i];	238	t += nextshape->off[i];
235		239
236	tr = t / B_COLS;	240	tr = t / B_COLS;
237	tc = t % B_COLS;	241	tc = t % B_COLS;
238		242
239	moveto(tr, 2*tc);	243	moveto(tr, 2*tc);
240	putstr(" ");	244	putstr(" ");
241	}	245	}
242	resume_normal();	246	resume_normal();
243	}	247	}
244		248
245	bp = &board[D_FIRST * B_COLS];	249	bp = &board[D_FIRST * B_COLS];
246	sp = &curscreen[D_FIRST * B_COLS];	250	sp = &curscreen[D_FIRST * B_COLS];
247	for (j = D_FIRST; j < D_LAST; j++) {	251	for (j = D_FIRST; j < D_LAST; j++) {
248	ccol = -1;	252	ccol = -1;
249	for (i = 0; i < B_COLS; bp++, sp++, i++) {	253	for (i = 0; i < B_COLS; bp++, sp++, i++) {
250	if (sp == (so = bp))	254	if (sp == (so = bp))
251	continue;	255	continue;
252	*sp = so;	256	*sp = so;
253	if (i != ccol) {	257	if (i != ccol) {
254	if (cur_so) {	258	if (cur_so) {
255	resume_normal();	259	resume_normal();
256	cur_so = 0;	260	cur_so = 0;
257	}	261	}
258	moveto(RTOD(j), CTOD(i));	262	moveto(RTOD(j), CTOD(i));
259	}	263	}
260	if (so != cur_so) {	264	if (so != cur_so) {
261	if (so)	265	if (so)
262	start_standout();	266	start_standout();
263	else	267	else
264	resume_normal();	268	resume_normal();
265	cur_so = so;	269	cur_so = so;
266	}	270	}
267	putstr(" ");	271	putstr(" ");
268		272
269	ccol = i + 1;	273	ccol = i + 1;
270	/*	274	/*
271	* Look ahead a bit, to avoid extra motion if	275	* Look ahead a bit, to avoid extra motion if
272	* we will be redrawing the cell after the next.	276	* we will be redrawing the cell after the next.
273	* Motion probably takes four or more characters,	277	* Motion probably takes four or more characters,
274	* so we save even if we rewrite two cells	278	* so we save even if we rewrite two cells
275	* `unnecessarily'. Skip it all, though, if	279	* `unnecessarily'. Skip it all, though, if
276	* the next cell is a different color.	280	* the next cell is a different color.
277	*/	281	*/
278	#define STOP (B_COLS - 3)	282	#define STOP (B_COLS - 3)
279	if (i > STOP \|\| sp[1] != bp[1] \|\| so != bp[1])	283	if (i > STOP \|\| sp[1] != bp[1] \|\| so != bp[1])
280	continue;	284	continue;
281	if (sp[2] != bp[2])	285	if (sp[2] != bp[2])
282	sp[1] = -1;	286	sp[1] = -1;
283	else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {	287	else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {
284	sp[2] = -1;	288	sp[2] = -1;
285	sp[1] = -1;	289	sp[1] = -1;
286	}	290	}
287	}	291	}
288	}	292	}
289	if (cur_so)	293	if (cur_so)
290	resume_normal();	294	resume_normal();
291	fflush();	295	fflush();
292	}	296	}
293		297
294	/*	298	/*
295	* Write a message (set!=0), or clear the same message (set==0).	299	* Write a message (set!=0), or clear the same message (set==0).
296	* (We need its length in case we have to overwrite with blanks.)	300	* (We need its length in case we have to overwrite with blanks.)
297	*/	301	*/
298	void	302	void
299	scr_msg(char *s, int set)	303	scr_msg(char *s, int set)
300	{	304	{
301		305
302	int l = strlen(s);	306	int l = strlen(s);
303		307
304	moveto(Rows - 2, ((Cols - l) >> 1) - 1);	308	moveto(Rows - 2, ((Cols - l) >> 1) - 1);
305	if (set)	309	if (set)
306	putstr(s);	310	putstr(s);
307	else	311	else
308	while (--l >= 0)	312	while (--l >= 0)
309	(void) putchar(' ');	313	(void) putchar(' ');
310	}	314	}
311		315

Subversion Repositories HelenOS-historic

(root)/uspace/trunk/tetris/screen.c @ 1532 – Rev 1532 → 1533