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)
{
    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(con_phone, CONSOLE_CLEAR, 0);
    moveto(0,0);
}
 
/*
 * Clear the screen, forgetting the current contents in the process.
 */
void
scr_clear(void)
{
 
    resume_normal();
    async_msg(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);
    async_msg(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(con_phone, CONSOLE_FLUSH, 0);
}
 
winsize_t winsize;
 
static int get_display_size(winsize_t *ws)
{
    return async_req_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)
{
    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 1610	Rev 1631
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 void (*tstp)(int);	58	static void (*tstp)(int);
59		59
60	static void scr_stop(int);	60	static void scr_stop(int);
61	static void stopset(int);	61	static void stopset(int);
62		62
63	static char	63	static char
64	CEstr; / clear to end of line */	64	CEstr; / clear to end of line */
65		65
66		66
67	/*	67	/*
68	* putstr() is for unpadded strings (either as in termcap(5) or	68	* putstr() is for unpadded strings (either as in termcap(5) or
69	* simply literal strings);	69	* simply literal strings);
70	*/	70	*/
71	static inline void putstr(char *s)	71	static inline void putstr(char *s)
72	{	72	{
73	while (*s)	73	while (*s)
74	putchar(*(s++));	74	putchar(*(s++));
75	}	75	}
76		76
77	static int con_phone;	77	static int con_phone;
78		78
79		79
80		80
81	static void set_style(int fgcolor, int bgcolor)	81	static void set_style(int fgcolor, int bgcolor)
82	{	82	{
83	async_msg_2(con_phone, CONSOLE_SET_STYLE, fgcolor, bgcolor);	83	async_msg_2(con_phone, CONSOLE_SET_STYLE, fgcolor, bgcolor);
84	}	84	}
85		85
86	static void start_standout(void)	86	static void start_standout(void)
87	{	87	{
88	set_style(0, 0xe0e0e0);	88	set_style(0xf0f0f0, 0);
89	}	89	}
90		90
91	static void resume_normal(void)	91	static void resume_normal(void)
92	{	92	{
93	set_style(0xe0e0e0, 0);	93	set_style(0, 0xf0f0f0);
94	}	94	}
95		95
96		96
97	void clear_screen(void)	97	void clear_screen(void)
98	{	98	{
99	async_msg(con_phone, CONSOLE_CLEAR, 0);	99	async_msg(con_phone, CONSOLE_CLEAR, 0);
100	moveto(0,0);	100	moveto(0,0);
101	}	101	}
102		102
103	/*	103	/*
104	* Clear the screen, forgetting the current contents in the process.	104	* Clear the screen, forgetting the current contents in the process.
105	*/	105	*/
106	void	106	void
107	scr_clear(void)	107	scr_clear(void)
108	{	108	{
109		109
110	resume_normal();	110	resume_normal();
111	async_msg(con_phone, CONSOLE_CLEAR, 0);	111	async_msg(con_phone, CONSOLE_CLEAR, 0);
112	curscore = -1;	112	curscore = -1;
113	memset((char *)curscreen, 0, sizeof(curscreen));	113	memset((char *)curscreen, 0, sizeof(curscreen));
114	}	114	}
115		115
116	/*	116	/*
117	* Set up screen	117	* Set up screen
118	*/	118	*/
119	void	119	void
120	scr_init(void)	120	scr_init(void)
121	{	121	{
122	con_phone = get_fd_phone(1);	122	con_phone = get_fd_phone(1);
123	async_msg(con_phone, CONSOLE_CURSOR_VISIBILITY, 0);	123	async_msg(con_phone, CONSOLE_CURSOR_VISIBILITY, 0);
124	resume_normal();	124	resume_normal();
125	scr_clear();	125	scr_clear();
126	}	126	}
127		127
128	void moveto(int r, int c)	128	void moveto(int r, int c)
129	{	129	{
130	async_msg_2(con_phone, CONSOLE_GOTO, r, c);	130	async_msg_2(con_phone, CONSOLE_GOTO, r, c);
131	}	131	}
132		132
133	static void fflush(void)	133	static void fflush(void)
134	{	134	{
135	async_msg(con_phone, CONSOLE_FLUSH, 0);	135	async_msg(con_phone, CONSOLE_FLUSH, 0);
136	}	136	}
137		137
138	winsize_t winsize;	138	winsize_t winsize;
139		139
140	static int get_display_size(winsize_t *ws)	140	static int get_display_size(winsize_t *ws)
141	{	141	{
142	return async_req_2(con_phone, CONSOLE_GETSIZE, 0, 0, &ws->ws_row, &ws->ws_col);	142	return async_req_2(con_phone, CONSOLE_GETSIZE, 0, 0, &ws->ws_row, &ws->ws_col);
143	}	143	}
144		144
145	static void	145	static void
146	scr_stop(int sig)	146	scr_stop(int sig)
147	{	147	{
148		148
149	scr_end();	149	scr_end();
150	scr_set();	150	scr_set();
151	scr_msg(key_msg, 1);	151	scr_msg(key_msg, 1);
152	}	152	}
153		153
154	/*	154	/*
155	* Set up screen mode.	155	* Set up screen mode.
156	*/	156	*/
157	void	157	void
158	scr_set(void)	158	scr_set(void)
159	{	159	{
160	winsize_t ws;	160	winsize_t ws;
161		161
162	Rows = 0, Cols = 0;	162	Rows = 0, Cols = 0;
163	if (get_display_size(&ws) == 0) {	163	if (get_display_size(&ws) == 0) {
164	Rows = ws.ws_row;	164	Rows = ws.ws_row;
165	Cols = ws.ws_col;	165	Cols = ws.ws_col;
166	}	166	}
167	if (Rows < MINROWS \|\| Cols < MINCOLS) {	167	if (Rows < MINROWS \|\| Cols < MINCOLS) {
168	char smallscr[55];	168	char smallscr[55];
169		169
170	snprintf(smallscr, sizeof(smallscr),	170	snprintf(smallscr, sizeof(smallscr),
171	"the screen is too small (must be at least %dx%d)",	171	"the screen is too small (must be at least %dx%d)",
172	MINROWS, MINCOLS);	172	MINROWS, MINCOLS);
173	stop(smallscr);	173	stop(smallscr);
174	}	174	}
175	isset = 1;	175	isset = 1;
176		176
177	scr_clear();	177	scr_clear();
178	}	178	}
179		179
180	/*	180	/*
181	* End screen mode.	181	* End screen mode.
182	*/	182	*/
183	void	183	void
184	scr_end(void)	184	scr_end(void)
185	{	185	{
186	}	186	}
187		187
188	void	188	void
189	stop(char *why)	189	stop(char *why)
190	{	190	{
191		191
192	if (isset)	192	if (isset)
193	scr_end();	193	scr_end();
194	errx(1, "aborting: %s", why);	194	errx(1, "aborting: %s", why);
195	}	195	}
196		196
197		197
198	/*	198	/*
199	* Update the screen.	199	* Update the screen.
200	*/	200	*/
201	void	201	void
202	scr_update(void)	202	scr_update(void)
203	{	203	{
204	cell bp, sp;	204	cell bp, sp;
205	cell so, cur_so = 0;	205	cell so, cur_so = 0;
206	int i, ccol, j;	206	int i, ccol, j;
207	static const struct shape *lastshape;	207	static const struct shape *lastshape;
208		208
209	/* always leave cursor after last displayed point */	209	/* always leave cursor after last displayed point */
210	curscreen[D_LAST * B_COLS - 1] = -1;	210	curscreen[D_LAST * B_COLS - 1] = -1;
211		211
212	if (score != curscore) {	212	if (score != curscore) {
213	moveto(0, 0);	213	moveto(0, 0);
214	printf("Score: %d", score);	214	printf("Score: %d", score);
215	curscore = score;	215	curscore = score;
216	}	216	}
217		217
218	/* draw preview of next pattern */	218	/* draw preview of next pattern */
219	if (showpreview && (nextshape != lastshape)) {	219	if (showpreview && (nextshape != lastshape)) {
220	int i;	220	int i;
221	static int r=5, c=2;	221	static int r=5, c=2;
222	int tr, tc, t;	222	int tr, tc, t;
223		223
224	lastshape = nextshape;	224	lastshape = nextshape;
225		225
226	/* clean */	226	/* clean */
227	resume_normal();	227	resume_normal();
228	moveto(r-1, c-1); putstr(" ");	228	moveto(r-1, c-1); putstr(" ");
229	moveto(r, c-1); putstr(" ");	229	moveto(r, c-1); putstr(" ");
230	moveto(r+1, c-1); putstr(" ");	230	moveto(r+1, c-1); putstr(" ");
231	moveto(r+2, c-1); putstr(" ");	231	moveto(r+2, c-1); putstr(" ");
232		232
233	moveto(r-3, c-2);	233	moveto(r-3, c-2);
234	putstr("Next shape:");	234	putstr("Next shape:");
235		235
236	/* draw */	236	/* draw */
237	start_standout();	237	start_standout();
238	moveto(r, 2 * c);	238	moveto(r, 2 * c);
239	putstr(" ");	239	putstr(" ");
240	for (i = 0; i < 3; i++) {	240	for (i = 0; i < 3; i++) {
241	t = c + r * B_COLS;	241	t = c + r * B_COLS;
242	t += nextshape->off[i];	242	t += nextshape->off[i];
243		243
244	tr = t / B_COLS;	244	tr = t / B_COLS;
245	tc = t % B_COLS;	245	tc = t % B_COLS;
246		246
247	moveto(tr, 2*tc);	247	moveto(tr, 2*tc);
248	putstr(" ");	248	putstr(" ");
249	}	249	}
250	resume_normal();	250	resume_normal();
251	}	251	}
252		252
253	bp = &board[D_FIRST * B_COLS];	253	bp = &board[D_FIRST * B_COLS];
254	sp = &curscreen[D_FIRST * B_COLS];	254	sp = &curscreen[D_FIRST * B_COLS];
255	for (j = D_FIRST; j < D_LAST; j++) {	255	for (j = D_FIRST; j < D_LAST; j++) {
256	ccol = -1;	256	ccol = -1;
257	for (i = 0; i < B_COLS; bp++, sp++, i++) {	257	for (i = 0; i < B_COLS; bp++, sp++, i++) {
258	if (sp == (so = bp))	258	if (sp == (so = bp))
259	continue;	259	continue;
260	*sp = so;	260	*sp = so;
261	if (i != ccol) {	261	if (i != ccol) {
262	if (cur_so) {	262	if (cur_so) {
263	resume_normal();	263	resume_normal();
264	cur_so = 0;	264	cur_so = 0;
265	}	265	}
266	moveto(RTOD(j), CTOD(i));	266	moveto(RTOD(j), CTOD(i));
267	}	267	}
268	if (so != cur_so) {	268	if (so != cur_so) {
269	if (so)	269	if (so)
270	start_standout();	270	start_standout();
271	else	271	else
272	resume_normal();	272	resume_normal();
273	cur_so = so;	273	cur_so = so;
274	}	274	}
275	putstr(" ");	275	putstr(" ");
276		276
277	ccol = i + 1;	277	ccol = i + 1;
278	/*	278	/*
279	* Look ahead a bit, to avoid extra motion if	279	* Look ahead a bit, to avoid extra motion if
280	* we will be redrawing the cell after the next.	280	* we will be redrawing the cell after the next.
281	* Motion probably takes four or more characters,	281	* Motion probably takes four or more characters,
282	* so we save even if we rewrite two cells	282	* so we save even if we rewrite two cells
283	* `unnecessarily'. Skip it all, though, if	283	* `unnecessarily'. Skip it all, though, if
284	* the next cell is a different color.	284	* the next cell is a different color.
285	*/	285	*/
286	#define STOP (B_COLS - 3)	286	#define STOP (B_COLS - 3)
287	if (i > STOP \|\| sp[1] != bp[1] \|\| so != bp[1])	287	if (i > STOP \|\| sp[1] != bp[1] \|\| so != bp[1])
288	continue;	288	continue;
289	if (sp[2] != bp[2])	289	if (sp[2] != bp[2])
290	sp[1] = -1;	290	sp[1] = -1;
291	else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {	291	else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {
292	sp[2] = -1;	292	sp[2] = -1;
293	sp[1] = -1;	293	sp[1] = -1;
294	}	294	}
295	}	295	}
296	}	296	}
297	if (cur_so)	297	if (cur_so)
298	resume_normal();	298	resume_normal();
299	fflush();	299	fflush();
300	}	300	}
301		301
302	/*	302	/*
303	* Write a message (set!=0), or clear the same message (set==0).	303	* Write a message (set!=0), or clear the same message (set==0).
304	* (We need its length in case we have to overwrite with blanks.)	304	* (We need its length in case we have to overwrite with blanks.)
305	*/	305	*/
306	void	306	void
307	scr_msg(char *s, int set)	307	scr_msg(char *s, int set)
308	{	308	{
309		309
310	int l = strlen(s);	310	int l = strlen(s);
311		311
312	moveto(Rows - 2, ((Cols - l) >> 1) - 1);	312	moveto(Rows - 2, ((Cols - l) >> 1) - 1);
313	if (set)	313	if (set)
314	putstr(s);	314	putstr(s);
315	else	315	else
316	while (--l >= 0)	316	while (--l >= 0)
317	(void) putchar(' ');	317	(void) putchar(' ');
318	}	318	}
319		319

Subversion Repositories HelenOS-historic

(root)/uspace/trunk/tetris/screen.c @ 1653 – Rev 1610 → 1631