WebSVN – HelenOS – Diff – /tags/0.4.1/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 4644	Rev 4687
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 */	65	static int use_color; /* true => use colors */
66		66
67	static const struct shape *lastshape;	67	static const struct shape *lastshape;
68		68
69		69
70	/*	70	/*
71	* putstr() is for unpadded strings (either as in termcap(5) or	71	* putstr() is for unpadded strings (either as in termcap(5) or
72	* simply literal strings);	72	* simply literal strings);
73	*/	73	*/
74	static inline void putstr(char *s)	74	static inline void putstr(char *s)
75	{	75	{
76	while (*s)	76	while (*s)
77	putchar(*(s++));	77	putchar(*(s++));
78	}	78	}
79		79
80	static void start_standout(uint32_t color)	80	static void start_standout(uint32_t color)
81	{	81	{
82	fflush(stdout);	82	fflush(stdout);
83	console_set_rgb_color(fphone(stdout), 0xf0f0f0,	83	console_set_rgb_color(fphone(stdout), 0xf0f0f0,
84	use_color ? color : 0x000000);	84	use_color ? color : 0x000000);
85	}	85	}
86		86
87	static void resume_normal(void)	87	static void resume_normal(void)
88	{	88	{
89	fflush(stdout);	89	fflush(stdout);
90	console_set_rgb_color(fphone(stdout), 0, 0xf0f0f0);	90	console_set_rgb_color(fphone(stdout), 0, 0xf0f0f0);
91	}	91	}
92		92
93	void clear_screen(void)	93	void clear_screen(void)
94	{	94	{
95	console_clear(fphone(stdout));	95	console_clear(fphone(stdout));
96	moveto(0, 0);	96	moveto(0, 0);
97	}	97	}
98		98
99	/*	99	/*
100	* Clear the screen, forgetting the current contents in the process.	100	* Clear the screen, forgetting the current contents in the process.
101	*/	101	*/
102	void scr_clear(void)	102	void scr_clear(void)
103	{	103	{
104	resume_normal();	104	resume_normal();
105	console_clear(fphone(stdout));	105	console_clear(fphone(stdout));
106	curscore = -1;	106	curscore = -1;
107	memset(curscreen, 0, sizeof(curscreen));	107	memset(curscreen, 0, sizeof(curscreen));
108	}	108	}
109		109
110	/*	110	/*
111	* Set up screen	111	* Set up screen
112	*/	112	*/
113	void scr_init(void)	113	void scr_init(void)
114	{	114	{
115	console_cursor_visibility(fphone(stdout), 0);	115	console_cursor_visibility(fphone(stdout), 0);
116	resume_normal();	116	resume_normal();
117	scr_clear();	117	scr_clear();
118	}	118	}
119		119
120	void moveto(int r, int c)	120	void moveto(int r, int c)
121	{	121	{
122	fflush(stdout);	122	fflush(stdout);
123	console_goto(fphone(stdout), c, r);	123	console_goto(fphone(stdout), c, r);
124	}	124	}
125		125
126	winsize_t winsize;	126	winsize_t winsize;
127		127
128	static int get_display_size(winsize_t *ws)	128	static int get_display_size(winsize_t *ws)
129	{	129	{
130	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);
131	}	131	}
132		132
133	static int get_display_color_sup(void)	133	static int get_display_color_sup(void)
134	{	134	{
135	int rc;	135	int rc;
136	int ccap;	136	int ccap;
137		137
138	rc = console_get_color_cap(fphone(stdout), &ccap);	138	rc = console_get_color_cap(fphone(stdout), &ccap);
139	if (rc != 0)	139	if (rc != 0)
140	return 0;	140	return 0;
141		141
142	return (ccap >= CONSOLE_CCAP_RGB);	142	return (ccap >= CONSOLE_CCAP_RGB);
143	}	143	}
144		144
145	/*	145	/*
146	* Set up screen mode.	146	* Set up screen mode.
147	*/	147	*/
148	void scr_set(void)	148	void scr_set(void)
149	{	149	{
150	winsize_t ws;	150	winsize_t ws;
151		151
152	Rows = 0;	152	Rows = 0;
153	Cols = 0;	153	Cols = 0;
154		154
155	if (get_display_size(&ws) == 0) {	155	if (get_display_size(&ws) == 0) {
156	Rows = ws.ws_row;	156	Rows = ws.ws_row;
157	Cols = ws.ws_col;	157	Cols = ws.ws_col;
158	}	158	}
159		159
160	use_color = get_display_color_sup();	160	use_color = get_display_color_sup();
161		161
162	if ((Rows < MINROWS) \|\| (Cols < MINCOLS)) {	162	if ((Rows < MINROWS) \|\| (Cols < MINCOLS)) {
163	char smallscr[55];	163	char smallscr[55];
164		164
165	snprintf(smallscr, sizeof(smallscr),	165	snprintf(smallscr, sizeof(smallscr),
166	"the screen is too small (must be at least %dx%d)",	166	"the screen is too small (must be at least %dx%d)",
167	MINROWS, MINCOLS);	167	MINROWS, MINCOLS);
168	stop(smallscr);	168	stop(smallscr);
169	}	169	}
170	isset = 1;	170	isset = 1;
171		171
172	scr_clear();	172	scr_clear();
173	}	173	}
174		174
175	/*	175	/*
176	* End screen mode.	176	* End screen mode.
177	*/	177	*/
178	void scr_end(void)	178	void scr_end(void)
179	{	179	{
180	console_cursor_visibility(fphone(stdout), 1);	180	console_cursor_visibility(fphone(stdout), 1);
181	}	181	}
182		182
183	void stop(char *why)	183	void stop(char *why)
184	{	184	{
185	if (isset)	185	if (isset)
186	scr_end();	186	scr_end();
187		187
188	errx(1, "aborting: %s", why);	188	errx(1, "aborting: %s", why);
189	}	189	}
190		190
191	/*	191	/*
192	* Update the screen.	192	* Update the screen.
193	*/	193	*/
194	void scr_update(void)	194	void scr_update(void)
195	{	195	{
196	cell *bp;	196	cell *bp;
197	cell *sp;	197	cell *sp;
198	cell so;	198	cell so;
199	cell cur_so = 0;	199	cell cur_so = 0;
200	int i;	200	int i;
201	int j;	201	int j;
202	int ccol;	202	int ccol;
203		203
204	/* Always leave cursor after last displayed point */	204	/* Always leave cursor after last displayed point */
205	curscreen[D_LAST * B_COLS - 1] = -1;	205	curscreen[D_LAST * B_COLS - 1] = -1;
206		206
207	if (score != curscore) {	207	if (score != curscore) {
208	moveto(0, 0);	208	moveto(0, 0);
209	printf("Score: %d", score);	209	printf("Score: %d", score);
210	curscore = score;	210	curscore = score;
211	}	211	}
212		212
213	/* Draw preview of next pattern */	213	/* Draw preview of next pattern */
214	if ((showpreview) && (nextshape != lastshape)) {	214	if ((showpreview) && (nextshape != lastshape)) {
215	int i;	215	int i;
216	static int r = 5, c = 2;	216	static int r = 5, c = 2;
217	int tr, tc, t;	217	int tr, tc, t;
218		218
219	lastshape = nextshape;	219	lastshape = nextshape;
220		220
221	/* Clean */	221	/* Clean */
222	resume_normal();	222	resume_normal();
223	moveto(r - 1, c - 1);	223	moveto(r - 1, c - 1);
224	putstr(" ");	224	putstr(" ");
225	moveto(r, c - 1);	225	moveto(r, c - 1);
226	putstr(" ");	226	putstr(" ");
227	moveto(r + 1, c - 1);	227	moveto(r + 1, c - 1);
228	putstr(" ");	228	putstr(" ");
229	moveto(r + 2, c - 1);	229	moveto(r + 2, c - 1);
230	putstr(" ");	230	putstr(" ");
231		231
232	moveto(r - 3, c - 2);	232	moveto(r - 3, c - 2);
233	putstr("Next shape:");	233	putstr("Next shape:");
234		234
235	/* Draw */	235	/* Draw */
236	start_standout(nextshape->color);	236	start_standout(nextshape->color);
237	moveto(r, 2 * c);	237	moveto(r, 2 * c);
238	putstr(" ");	238	putstr(" ");
239	for (i = 0; i < 3; i++) {	239	for (i = 0; i < 3; i++) {
240	t = c + r * B_COLS;	240	t = c + r * B_COLS;
241	t += nextshape->off[i];	241	t += nextshape->off[i];
242		242
243	tr = t / B_COLS;	243	tr = t / B_COLS;
244	tc = t % B_COLS;	244	tc = t % B_COLS;
245		245
246	moveto(tr, 2*tc);	246	moveto(tr, 2*tc);
247	putstr(" ");	247	putstr(" ");
248	}	248	}
249	resume_normal();	249	resume_normal();
250	}	250	}
251		251
252	bp = &board[D_FIRST * B_COLS];	252	bp = &board[D_FIRST * B_COLS];
253	sp = &curscreen[D_FIRST * B_COLS];	253	sp = &curscreen[D_FIRST * B_COLS];
254	for (j = D_FIRST; j < D_LAST; j++) {	254	for (j = D_FIRST; j < D_LAST; j++) {
255	ccol = -1;	255	ccol = -1;
256	for (i = 0; i < B_COLS; bp++, sp++, i++) {	256	for (i = 0; i < B_COLS; bp++, sp++, i++) {
257	if (sp == (so = bp))	257	if (sp == (so = bp))
258	continue;	258	continue;
259		259
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		268
269	if (so != cur_so) {	269	if (so != cur_so) {
270	if (so)	270	if (so)
271	start_standout(so);	271	start_standout(so);
272	else	272	else
273	resume_normal();	273	resume_normal();
274	cur_so = so;	274	cur_so = so;
275	}	275	}
276	putstr(" ");	276	putstr(" ");
277		277
278	ccol = i + 1;	278	ccol = i + 1;
279	/*	279	/*
280	* Look ahead a bit, to avoid extra motion if	280	* Look ahead a bit, to avoid extra motion if
281	* we will be redrawing the cell after the next.	281	* we will be redrawing the cell after the next.
282	* Motion probably takes four or more characters,	282	* Motion probably takes four or more characters,
283	* so we save even if we rewrite two cells	283	* so we save even if we rewrite two cells
284	* `unnecessarily'. Skip it all, though, if	284	* `unnecessarily'. Skip it all, though, if
285	* the next cell is a different color.	285	* the next cell is a different color.
286	*/	286	*/
287		287
288	if ((i > STOP) \|\| (sp[1] != bp[1]) \|\| (so != bp[1]))	288	if ((i > STOP) \|\| (sp[1] != bp[1]) \|\| (so != bp[1]))
289	continue;	289	continue;
290		290
291	if (sp[2] != bp[2])	291	if (sp[2] != bp[2])
292	sp[1] = -1;	292	sp[1] = -1;
293	else if ((i < STOP) && (so == bp[2]) && (sp[3] != bp[3])) {	293	else if ((i < STOP) && (so == bp[2]) && (sp[3] != bp[3])) {
294	sp[2] = -1;	294	sp[2] = -1;
295	sp[1] = -1;	295	sp[1] = -1;
296	}	296	}
297	}	297	}
298	}	298	}
299		299
300	if (cur_so)	300	if (cur_so)
301	resume_normal();	301	resume_normal();
302		302
303	fflush(stdout);	303	fflush(stdout);
304	}	304	}
305		305
306	/*	306	/*
307	* 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).
308	* (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.)
309	*/	309	*/
310	void scr_msg(char *s, int set)	310	void scr_msg(char *s, int set)
311	{	311	{
312	int l = str_size(s);	312	int l = str_size(s);
313		313
314	moveto(Rows - 2, ((Cols - l) >> 1) - 1);	314	moveto(Rows - 2, ((Cols - l) >> 1) - 1);
315		315
316	if (set)	316	if (set)
317	putstr(s);	317	putstr(s);
318	else	318	else
319	while (--l >= 0)	319	while (--l >= 0)
320	(void) putchar(' ');	320	(void) putchar(' ');
321	}	321	}
322		322
323	/** @}	323	/** @}
324	*/	324	*/
325		325

Subversion Repositories HelenOS

(root)/tags/0.4.1/uspace/app/tetris/screen.c – Rev 4644 → 4687