WebSVN – HelenOS – Diff – /tags/0.2.0.1/uspace/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 "../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 1965	Rev 1968
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 "../console/console.h"	59	#include "../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	static void (*tstp)(int);	64	static void (*tstp)(int);
65		65
66	static void scr_stop(int);	66	static void scr_stop(int);
67	static void stopset(int);	67	static void stopset(int);
68		68
69	static char	69	static char
70	CEstr; / clear to end of line */	70	CEstr; / clear to end of line */
71		71
72		72
73	/*	73	/*
74	* putstr() is for unpadded strings (either as in termcap(5) or	74	* putstr() is for unpadded strings (either as in termcap(5) or
75	* simply literal strings);	75	* simply literal strings);
76	*/	76	*/
77	static inline void putstr(char *s)	77	static inline void putstr(char *s)
78	{	78	{
79	while (*s)	79	while (*s)
80	putchar(*(s++));	80	putchar(*(s++));
81	}	81	}
82		82
83	static int con_phone;	83	static int con_phone;
84		84
85		85
86		86
87	static void set_style(int fgcolor, int bgcolor)	87	static void set_style(int fgcolor, int bgcolor)
88	{	88	{
89	async_msg_2(con_phone, CONSOLE_SET_STYLE, fgcolor, bgcolor);	89	async_msg_2(con_phone, CONSOLE_SET_STYLE, fgcolor, bgcolor);
90	}	90	}
91		91
92	static void start_standout(void)	92	static void start_standout(void)
93	{	93	{
94	set_style(0xf0f0f0, 0);	94	set_style(0xf0f0f0, 0);
95	}	95	}
96		96
97	static void resume_normal(void)	97	static void resume_normal(void)
98	{	98	{
99	set_style(0, 0xf0f0f0);	99	set_style(0, 0xf0f0f0);
100	}	100	}
101		101
102		102
103	void clear_screen(void)	103	void clear_screen(void)
104	{	104	{
105	async_msg(con_phone, CONSOLE_CLEAR, 0);	105	async_msg(con_phone, CONSOLE_CLEAR, 0);
106	moveto(0,0);	106	moveto(0,0);
107	}	107	}
108		108
109	/*	109	/*
110	* Clear the screen, forgetting the current contents in the process.	110	* Clear the screen, forgetting the current contents in the process.
111	*/	111	*/
112	void	112	void
113	scr_clear(void)	113	scr_clear(void)
114	{	114	{
115		115
116	resume_normal();	116	resume_normal();
117	async_msg(con_phone, CONSOLE_CLEAR, 0);	117	async_msg(con_phone, CONSOLE_CLEAR, 0);
118	curscore = -1;	118	curscore = -1;
119	memset((char *)curscreen, 0, sizeof(curscreen));	119	memset((char *)curscreen, 0, sizeof(curscreen));
120	}	120	}
121		121
122	/*	122	/*
123	* Set up screen	123	* Set up screen
124	*/	124	*/
125	void	125	void
126	scr_init(void)	126	scr_init(void)
127	{	127	{
128	con_phone = get_fd_phone(1);	128	con_phone = get_fd_phone(1);
129	async_msg(con_phone, CONSOLE_CURSOR_VISIBILITY, 0);	129	async_msg(con_phone, CONSOLE_CURSOR_VISIBILITY, 0);
130	resume_normal();	130	resume_normal();
131	scr_clear();	131	scr_clear();
132	}	132	}
133		133
134	void moveto(int r, int c)	134	void moveto(int r, int c)
135	{	135	{
136	async_msg_2(con_phone, CONSOLE_GOTO, r, c);	136	async_msg_2(con_phone, CONSOLE_GOTO, r, c);
137	}	137	}
138		138
139	static void fflush(void)	139	static void fflush(void)
140	{	140	{
141	async_msg(con_phone, CONSOLE_FLUSH, 0);	141	async_msg(con_phone, CONSOLE_FLUSH, 0);
142	}	142	}
143		143
144	winsize_t winsize;	144	winsize_t winsize;
145		145
146	static int get_display_size(winsize_t *ws)	146	static int get_display_size(winsize_t *ws)
147	{	147	{
148	return async_req_2(con_phone, CONSOLE_GETSIZE, 0, 0, &ws->ws_row, &ws->ws_col);	148	return async_req_2(con_phone, CONSOLE_GETSIZE, 0, 0, &ws->ws_row, &ws->ws_col);
149	}	149	}
150		150
151	static void	151	static void
152	scr_stop(int sig)	152	scr_stop(int sig)
153	{	153	{
154		154
155	scr_end();	155	scr_end();
156	scr_set();	156	scr_set();
157	scr_msg(key_msg, 1);	157	scr_msg(key_msg, 1);
158	}	158	}
159		159
160	/*	160	/*
161	* Set up screen mode.	161	* Set up screen mode.
162	*/	162	*/
163	void	163	void
164	scr_set(void)	164	scr_set(void)
165	{	165	{
166	winsize_t ws;	166	winsize_t ws;
167		167
168	Rows = 0, Cols = 0;	168	Rows = 0, Cols = 0;
169	if (get_display_size(&ws) == 0) {	169	if (get_display_size(&ws) == 0) {
170	Rows = ws.ws_row;	170	Rows = ws.ws_row;
171	Cols = ws.ws_col;	171	Cols = ws.ws_col;
172	}	172	}
173	if (Rows < MINROWS \|\| Cols < MINCOLS) {	173	if (Rows < MINROWS \|\| Cols < MINCOLS) {
174	char smallscr[55];	174	char smallscr[55];
175		175
176	snprintf(smallscr, sizeof(smallscr),	176	snprintf(smallscr, sizeof(smallscr),
177	"the screen is too small (must be at least %dx%d)",	177	"the screen is too small (must be at least %dx%d)",
178	MINROWS, MINCOLS);	178	MINROWS, MINCOLS);
179	stop(smallscr);	179	stop(smallscr);
180	}	180	}
181	isset = 1;	181	isset = 1;
182		182
183	scr_clear();	183	scr_clear();
184	}	184	}
185		185
186	/*	186	/*
187	* End screen mode.	187	* End screen mode.
188	*/	188	*/
189	void	189	void
190	scr_end(void)	190	scr_end(void)
191	{	191	{
192	}	192	}
193		193
194	void	194	void
195	stop(char *why)	195	stop(char *why)
196	{	196	{
197		197
198	if (isset)	198	if (isset)
199	scr_end();	199	scr_end();
200	errx(1, "aborting: %s", why);	200	errx(1, "aborting: %s", why);
201	}	201	}
202		202
203		203
204	/*	204	/*
205	* Update the screen.	205	* Update the screen.
206	*/	206	*/
207	void	207	void
208	scr_update(void)	208	scr_update(void)
209	{	209	{
210	cell bp, sp;	210	cell bp, sp;
211	cell so, cur_so = 0;	211	cell so, cur_so = 0;
212	int i, ccol, j;	212	int i, ccol, j;
213	static const struct shape *lastshape;	213	static const struct shape *lastshape;
214		214
215	/* always leave cursor after last displayed point */	215	/* always leave cursor after last displayed point */
216	curscreen[D_LAST * B_COLS - 1] = -1;	216	curscreen[D_LAST * B_COLS - 1] = -1;
217		217
218	if (score != curscore) {	218	if (score != curscore) {
219	moveto(0, 0);	219	moveto(0, 0);
220	printf("Score: %d", score);	220	printf("Score: %d", score);
221	curscore = score;	221	curscore = score;
222	}	222	}
223		223
224	/* draw preview of next pattern */	224	/* draw preview of next pattern */
225	if (showpreview && (nextshape != lastshape)) {	225	if (showpreview && (nextshape != lastshape)) {
226	int i;	226	int i;
227	static int r=5, c=2;	227	static int r=5, c=2;
228	int tr, tc, t;	228	int tr, tc, t;
229		229
230	lastshape = nextshape;	230	lastshape = nextshape;
231		231
232	/* clean */	232	/* clean */
233	resume_normal();	233	resume_normal();
234	moveto(r-1, c-1); putstr(" ");	234	moveto(r-1, c-1); putstr(" ");
235	moveto(r, c-1); putstr(" ");	235	moveto(r, c-1); putstr(" ");
236	moveto(r+1, c-1); putstr(" ");	236	moveto(r+1, c-1); putstr(" ");
237	moveto(r+2, c-1); putstr(" ");	237	moveto(r+2, c-1); putstr(" ");
238		238
239	moveto(r-3, c-2);	239	moveto(r-3, c-2);
240	putstr("Next shape:");	240	putstr("Next shape:");
241		241
242	/* draw */	242	/* draw */
243	start_standout();	243	start_standout();
244	moveto(r, 2 * c);	244	moveto(r, 2 * c);
245	putstr(" ");	245	putstr(" ");
246	for (i = 0; i < 3; i++) {	246	for (i = 0; i < 3; i++) {
247	t = c + r * B_COLS;	247	t = c + r * B_COLS;
248	t += nextshape->off[i];	248	t += nextshape->off[i];
249		249
250	tr = t / B_COLS;	250	tr = t / B_COLS;
251	tc = t % B_COLS;	251	tc = t % B_COLS;
252		252
253	moveto(tr, 2*tc);	253	moveto(tr, 2*tc);
254	putstr(" ");	254	putstr(" ");
255	}	255	}
256	resume_normal();	256	resume_normal();
257	}	257	}
258		258
259	bp = &board[D_FIRST * B_COLS];	259	bp = &board[D_FIRST * B_COLS];
260	sp = &curscreen[D_FIRST * B_COLS];	260	sp = &curscreen[D_FIRST * B_COLS];
261	for (j = D_FIRST; j < D_LAST; j++) {	261	for (j = D_FIRST; j < D_LAST; j++) {
262	ccol = -1;	262	ccol = -1;
263	for (i = 0; i < B_COLS; bp++, sp++, i++) {	263	for (i = 0; i < B_COLS; bp++, sp++, i++) {
264	if (sp == (so = bp))	264	if (sp == (so = bp))
265	continue;	265	continue;
266	*sp = so;	266	*sp = so;
267	if (i != ccol) {	267	if (i != ccol) {
268	if (cur_so) {	268	if (cur_so) {
269	resume_normal();	269	resume_normal();
270	cur_so = 0;	270	cur_so = 0;
271	}	271	}
272	moveto(RTOD(j), CTOD(i));	272	moveto(RTOD(j), CTOD(i));
273	}	273	}
274	if (so != cur_so) {	274	if (so != cur_so) {
275	if (so)	275	if (so)
276	start_standout();	276	start_standout();
277	else	277	else
278	resume_normal();	278	resume_normal();
279	cur_so = so;	279	cur_so = so;
280	}	280	}
281	putstr(" ");	281	putstr(" ");
282		282
283	ccol = i + 1;	283	ccol = i + 1;
284	/*	284	/*
285	* Look ahead a bit, to avoid extra motion if	285	* Look ahead a bit, to avoid extra motion if
286	* we will be redrawing the cell after the next.	286	* we will be redrawing the cell after the next.
287	* Motion probably takes four or more characters,	287	* Motion probably takes four or more characters,
288	* so we save even if we rewrite two cells	288	* so we save even if we rewrite two cells
289	* `unnecessarily'. Skip it all, though, if	289	* `unnecessarily'. Skip it all, though, if
290	* the next cell is a different color.	290	* the next cell is a different color.
291	*/	291	*/
292	#define STOP (B_COLS - 3)	292	#define STOP (B_COLS - 3)
293	if (i > STOP \|\| sp[1] != bp[1] \|\| so != bp[1])	293	if (i > STOP \|\| sp[1] != bp[1] \|\| so != bp[1])
294	continue;	294	continue;
295	if (sp[2] != bp[2])	295	if (sp[2] != bp[2])
296	sp[1] = -1;	296	sp[1] = -1;
297	else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {	297	else if (i < STOP && so == bp[2] && sp[3] != bp[3]) {
298	sp[2] = -1;	298	sp[2] = -1;
299	sp[1] = -1;	299	sp[1] = -1;
300	}	300	}
301	}	301	}
302	}	302	}
303	if (cur_so)	303	if (cur_so)
304	resume_normal();	304	resume_normal();
305	fflush();	305	fflush();
306	}	306	}
307		307
308	/*	308	/*
309	* Write a message (set!=0), or clear the same message (set==0).	309	* Write a message (set!=0), or clear the same message (set==0).
310	* (We need its length in case we have to overwrite with blanks.)	310	* (We need its length in case we have to overwrite with blanks.)
311	*/	311	*/
312	void	312	void
313	scr_msg(char *s, int set)	313	scr_msg(char *s, int set)
314	{	314	{
315		315
316	int l = strlen(s);	316	int l = strlen(s);
317		317
318	moveto(Rows - 2, ((Cols - l) >> 1) - 1);	318	moveto(Rows - 2, ((Cols - l) >> 1) - 1);
319	if (set)	319	if (set)
320	putstr(s);	320	putstr(s);
321	else	321	else
322	while (--l >= 0)	322	while (--l >= 0)
323	(void) putchar(' ');	323	(void) putchar(' ');
324	}	324	}
325		325
326	/** @}	326	/** @}
327	*/	327	*/
328		328
329		329

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(root)/tags/0.2.0.1/uspace/tetris/screen.c – Rev 1965 → 1968