WebSVN – HelenOS – Diff – /branches/dd/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 <vfs/vfs.h>
#include <async.h>
#include "screen.h"
#include "tetris.h"
#include <io/console.h>
 
#define STOP  (B_COLS - 3)
 
static cell curscreen[B_SIZE];  /* non-zero => standout (or otherwise marked) */
static int curscore;
static int isset;               /* true => terminal is in game mode */
 
static int use_color;       /* true => use colors */
 
static const struct shape *lastshape;
 
 
/*
 * 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 void start_standout(uint32_t color)
{
    fflush(stdout);
    console_set_rgb_color(fphone(stdout), 0xf0f0f0,
        use_color ? color : 0x000000);
}
 
static void resume_normal(void)
{
    fflush(stdout);
    console_set_rgb_color(fphone(stdout), 0, 0xf0f0f0);
}
 
void clear_screen(void)
{
    console_clear(fphone(stdout));
    moveto(0, 0);
}
 
/*
 * Clear the screen, forgetting the current contents in the process.
 */
void scr_clear(void)
{
    resume_normal();
    console_clear(fphone(stdout));
    curscore = -1;
    memset(curscreen, 0, sizeof(curscreen));
}
 
/*
 * Set up screen
 */
void scr_init(void)
{
    console_cursor_visibility(fphone(stdout), 0);
    resume_normal();
    scr_clear();
}
 
void moveto(int r, int c)
{
    fflush(stdout);
    console_goto(fphone(stdout), c, r);
}
 
winsize_t winsize;
 
static int get_display_size(winsize_t *ws)
{
    return console_get_size(fphone(stdout), &ws->ws_col, &ws->ws_row);
}
 
static int get_display_color_sup(void)
{
    int rc;
    int ccap;
 
    rc = console_get_color_cap(fphone(stdout), &ccap);
    if (rc != 0)
        return 0;
 
    return (ccap >= CONSOLE_CCAP_RGB);
}
 
/*
 * 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;
    }
 
    use_color = get_display_color_sup();
   
    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)
{
    console_cursor_visibility(fphone(stdout), 1);
}
 
void stop(char *why)
{
    if (isset)
        scr_end();
   
    errx(1, "aborting: %s", why);
}
 
/*
 * Update the screen.
 */
void scr_update(void)
{
    cell *bp;
    cell *sp;
    cell so;
    cell cur_so = 0;
    int i;
    int j;
    int ccol;
   
    /* 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(nextshape->color);
        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(so);
                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.
             */
           
            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(stdout);
}
 
/*
 * 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 = str_size(s);
   
    moveto(Rows - 2, ((Cols - l) >> 1) - 1);
   
    if (set)
        putstr(s);
    else
        while (--l >= 0)
            (void) putchar(' ');
}
 
/** @}
 */
 

Rev 4537	Rev 4668
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 <vfs/vfs.h>	53	#include <vfs/vfs.h>
54	#include <async.h>	54	#include <async.h>
55	#include "screen.h"	55	#include "screen.h"
56	#include "tetris.h"	56	#include "tetris.h"
57	#include <io/console.h>	57	#include <io/console.h>
58		58
59	#define STOP (B_COLS - 3)	59	#define STOP (B_COLS - 3)
60		60
61	static cell curscreen[B_SIZE]; /* non-zero => standout (or otherwise marked) */	61	static cell curscreen[B_SIZE]; /* non-zero => 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	static int use_color; /* true => use colors */
-		66
65	static const struct shape *lastshape;	67	static const struct shape *lastshape;
66		68
67		69
68	/*	70	/*
69	* putstr() is for unpadded strings (either as in termcap(5) or	71	* putstr() is for unpadded strings (either as in termcap(5) or
70	* simply literal strings);	72	* simply literal strings);
71	*/	73	*/
72	static inline void putstr(char *s)	74	static inline void putstr(char *s)
73	{	75	{
74	while (*s)	76	while (*s)
75	putchar(*(s++));	77	putchar(*(s++));
76	}	78	}
77		79
78	static void start_standout(uint32_t color)	80	static void start_standout(uint32_t color)
79	{	81	{
-		82	fflush(stdout);
80	console_set_rgb_color(fphone(stdout), 0xf0f0f0, color);	83	console_set_rgb_color(fphone(stdout), 0xf0f0f0,
-		84	use_color ? color : 0x000000);
81	}	85	}
82		86
83	static void resume_normal(void)	87	static void resume_normal(void)
84	{	88	{
-		89	fflush(stdout);
85	console_set_rgb_color(fphone(stdout), 0, 0xf0f0f0);	90	console_set_rgb_color(fphone(stdout), 0, 0xf0f0f0);
86	}	91	}
87		92
88	void clear_screen(void)	93	void clear_screen(void)
89	{	94	{
90	console_clear(fphone(stdout));	95	console_clear(fphone(stdout));
91	moveto(0, 0);	96	moveto(0, 0);
92	}	97	}
93		98
94	/*	99	/*
95	* Clear the screen, forgetting the current contents in the process.	100	* Clear the screen, forgetting the current contents in the process.
96	*/	101	*/
97	void scr_clear(void)	102	void scr_clear(void)
98	{	103	{
99	resume_normal();	104	resume_normal();
100	console_clear(fphone(stdout));	105	console_clear(fphone(stdout));
101	curscore = -1;	106	curscore = -1;
102	memset(curscreen, 0, sizeof(curscreen));	107	memset(curscreen, 0, sizeof(curscreen));
103	}	108	}
104		109
105	/*	110	/*
106	* Set up screen	111	* Set up screen
107	*/	112	*/
108	void scr_init(void)	113	void scr_init(void)
109	{	114	{
110	console_cursor_visibility(fphone(stdout), 0);	115	console_cursor_visibility(fphone(stdout), 0);
111	resume_normal();	116	resume_normal();
112	scr_clear();	117	scr_clear();
113	}	118	}
114		119
115	void moveto(int r, int c)	120	void moveto(int r, int c)
116	{	121	{
-		122	fflush(stdout);
117	console_goto(fphone(stdout), c, r);	123	console_goto(fphone(stdout), c, r);
118	}	124	}
119		125
120	winsize_t winsize;	126	winsize_t winsize;
121		127
122	static int get_display_size(winsize_t *ws)	128	static int get_display_size(winsize_t *ws)
123	{	129	{
124	return console_get_size(fphone(stdout), &ws->ws_col, &ws->ws_row);	130	return console_get_size(fphone(stdout), &ws->ws_col, &ws->ws_row);
125	}	131	}
126		132
-		133	static int get_display_color_sup(void)
-		134	{
-		135	int rc;
-		136	int ccap;
-		137
-		138	rc = console_get_color_cap(fphone(stdout), &ccap);
-		139	if (rc != 0)
-		140	return 0;
-		141
-		142	return (ccap >= CONSOLE_CCAP_RGB);
-		143	}
-		144
127	/*	145	/*
128	* Set up screen mode.	146	* Set up screen mode.
129	*/	147	*/
130	void scr_set(void)	148	void scr_set(void)
131	{	149	{
132	winsize_t ws;	150	winsize_t ws;
133		151
134	Rows = 0;	152	Rows = 0;
135	Cols = 0;	153	Cols = 0;
136		154
137	if (get_display_size(&ws) == 0) {	155	if (get_display_size(&ws) == 0) {
138	Rows = ws.ws_row;	156	Rows = ws.ws_row;
139	Cols = ws.ws_col;	157	Cols = ws.ws_col;
140	}	158	}
-		159
-		160	use_color = get_display_color_sup();
141		161
142	if ((Rows < MINROWS) \|\| (Cols < MINCOLS)) {	162	if ((Rows < MINROWS) \|\| (Cols < MINCOLS)) {
143	char smallscr[55];	163	char smallscr[55];
144		164
145	snprintf(smallscr, sizeof(smallscr),	165	snprintf(smallscr, sizeof(smallscr),
146	"the screen is too small (must be at least %dx%d)",	166	"the screen is too small (must be at least %dx%d)",
147	MINROWS, MINCOLS);	167	MINROWS, MINCOLS);
148	stop(smallscr);	168	stop(smallscr);
149	}	169	}
150	isset = 1;	170	isset = 1;
151		171
152	scr_clear();	172	scr_clear();
153	}	173	}
154		174
155	/*	175	/*
156	* End screen mode.	176	* End screen mode.
157	*/	177	*/
158	void scr_end(void)	178	void scr_end(void)
159	{	179	{
160	console_cursor_visibility(fphone(stdout), 1);	180	console_cursor_visibility(fphone(stdout), 1);
161	}	181	}
162		182
163	void stop(char *why)	183	void stop(char *why)
164	{	184	{
165	if (isset)	185	if (isset)
166	scr_end();	186	scr_end();
167		187
168	errx(1, "aborting: %s", why);	188	errx(1, "aborting: %s", why);
169	}	189	}
170		190
171	/*	191	/*
172	* Update the screen.	192	* Update the screen.
173	*/	193	*/
174	void scr_update(void)	194	void scr_update(void)
175	{	195	{
176	cell *bp;	196	cell *bp;
177	cell *sp;	197	cell *sp;
178	cell so;	198	cell so;
179	cell cur_so = 0;	199	cell cur_so = 0;
180	int i;	200	int i;
181	int j;	201	int j;
182	int ccol;	202	int ccol;
183		203
184	/* Always leave cursor after last displayed point */	204	/* Always leave cursor after last displayed point */
185	curscreen[D_LAST * B_COLS - 1] = -1;	205	curscreen[D_LAST * B_COLS - 1] = -1;
186		206
187	if (score != curscore) {	207	if (score != curscore) {
188	moveto(0, 0);	208	moveto(0, 0);
189	printf("Score: %d", score);	209	printf("Score: %d", score);
190	curscore = score;	210	curscore = score;
191	}	211	}
192		212
193	/* Draw preview of next pattern */	213	/* Draw preview of next pattern */
194	if ((showpreview) && (nextshape != lastshape)) {	214	if ((showpreview) && (nextshape != lastshape)) {
195	int i;	215	int i;
196	static int r = 5, c = 2;	216	static int r = 5, c = 2;
197	int tr, tc, t;	217	int tr, tc, t;
198		218
199	lastshape = nextshape;	219	lastshape = nextshape;
200		220
201	/* Clean */	221	/* Clean */
202	resume_normal();	222	resume_normal();
203	moveto(r - 1, c - 1);	223	moveto(r - 1, c - 1);
204	putstr(" ");	224	putstr(" ");
205	moveto(r, c - 1);	225	moveto(r, c - 1);
206	putstr(" ");	226	putstr(" ");
207	moveto(r + 1, c - 1);	227	moveto(r + 1, c - 1);
208	putstr(" ");	228	putstr(" ");
209	moveto(r + 2, c - 1);	229	moveto(r + 2, c - 1);
210	putstr(" ");	230	putstr(" ");
211		231
212	moveto(r - 3, c - 2);	232	moveto(r - 3, c - 2);
213	putstr("Next shape:");	233	putstr("Next shape:");
214		234
215	/* Draw */	235	/* Draw */
216	start_standout(nextshape->color);	236	start_standout(nextshape->color);
217	moveto(r, 2 * c);	237	moveto(r, 2 * c);
218	putstr(" ");	238	putstr(" ");
219	for (i = 0; i < 3; i++) {	239	for (i = 0; i < 3; i++) {
220	t = c + r * B_COLS;	240	t = c + r * B_COLS;
221	t += nextshape->off[i];	241	t += nextshape->off[i];
222		242
223	tr = t / B_COLS;	243	tr = t / B_COLS;
224	tc = t % B_COLS;	244	tc = t % B_COLS;
225		245
226	moveto(tr, 2*tc);	246	moveto(tr, 2*tc);
227	putstr(" ");	247	putstr(" ");
228	}	248	}
229	resume_normal();	249	resume_normal();
230	}	250	}
231		251
232	bp = &board[D_FIRST * B_COLS];	252	bp = &board[D_FIRST * B_COLS];
233	sp = &curscreen[D_FIRST * B_COLS];	253	sp = &curscreen[D_FIRST * B_COLS];
234	for (j = D_FIRST; j < D_LAST; j++) {	254	for (j = D_FIRST; j < D_LAST; j++) {
235	ccol = -1;	255	ccol = -1;
236	for (i = 0; i < B_COLS; bp++, sp++, i++) {	256	for (i = 0; i < B_COLS; bp++, sp++, i++) {
237	if (sp == (so = bp))	257	if (sp == (so = bp))
238	continue;	258	continue;
239		259
240	*sp = so;	260	*sp = so;
241	if (i != ccol) {	261	if (i != ccol) {
242	if (cur_so) {	262	if (cur_so) {
243	resume_normal();	263	resume_normal();
244	cur_so = 0;	264	cur_so = 0;
245	}	265	}
246	moveto(RTOD(j), CTOD(i));	266	moveto(RTOD(j), CTOD(i));
247	}	267	}
248		268
249	if (so != cur_so) {	269	if (so != cur_so) {
250	if (so)	270	if (so)
251	start_standout(so);	271	start_standout(so);
252	else	272	else
253	resume_normal();	273	resume_normal();
254	cur_so = so;	274	cur_so = so;
255	}	275	}
256	putstr(" ");	276	putstr(" ");
257		277
258	ccol = i + 1;	278	ccol = i + 1;
259	/*	279	/*
260	* Look ahead a bit, to avoid extra motion if	280	* Look ahead a bit, to avoid extra motion if
261	* we will be redrawing the cell after the next.	281	* we will be redrawing the cell after the next.
262	* Motion probably takes four or more characters,	282	* Motion probably takes four or more characters,
263	* so we save even if we rewrite two cells	283	* so we save even if we rewrite two cells
264	* `unnecessarily'. Skip it all, though, if	284	* `unnecessarily'. Skip it all, though, if
265	* the next cell is a different color.	285	* the next cell is a different color.
266	*/	286	*/
267		287
268	if ((i > STOP) \|\| (sp[1] != bp[1]) \|\| (so != bp[1]))	288	if ((i > STOP) \|\| (sp[1] != bp[1]) \|\| (so != bp[1]))
269	continue;	289	continue;
270		290
271	if (sp[2] != bp[2])	291	if (sp[2] != bp[2])
272	sp[1] = -1;	292	sp[1] = -1;
273	else if ((i < STOP) && (so == bp[2]) && (sp[3] != bp[3])) {	293	else if ((i < STOP) && (so == bp[2]) && (sp[3] != bp[3])) {
274	sp[2] = -1;	294	sp[2] = -1;
275	sp[1] = -1;	295	sp[1] = -1;
276	}	296	}
277	}	297	}
278	}	298	}
279		299
280	if (cur_so)	300	if (cur_so)
281	resume_normal();	301	resume_normal();
282		302
283	fflush(stdout);	303	fflush(stdout);
284	}	304	}
285		305
286	/*	306	/*
287	* Write a message (set != 0), or clear the same message (set == 0).	307	* Write a message (set != 0), or clear the same message (set == 0).
288	* (We need its length in case we have to overwrite with blanks.)	308	* (We need its length in case we have to overwrite with blanks.)
289	*/	309	*/
290	void scr_msg(char *s, int set)	310	void scr_msg(char *s, int set)
291	{	311	{
292	int l = str_size(s);	312	int l = str_size(s);
293		313
294	moveto(Rows - 2, ((Cols - l) >> 1) - 1);	314	moveto(Rows - 2, ((Cols - l) >> 1) - 1);
295		315
296	if (set)	316	if (set)
297	putstr(s);	317	putstr(s);
298	else	318	else
299	while (--l >= 0)	319	while (--l >= 0)
300	(void) putchar(' ');	320	(void) putchar(' ');
301	}	321	}
302		322
303	/** @}	323	/** @}
304	*/	324	*/
305		325

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(root)/branches/dd/uspace/app/tetris/screen.c – Rev 4537 → 4668