1 76193d7c 2003-09-30 devnull #include <u.h>
  2 76193d7c 2003-09-30 devnull #include <libc.h>
  3 76193d7c 2003-09-30 devnull #include <draw.h>
  4 76193d7c 2003-09-30 devnull 
  5 76193d7c 2003-09-30 devnull Display	*display;
  6 76193d7c 2003-09-30 devnull Font	*font;
  7 76193d7c 2003-09-30 devnull Image	*screen;
  8 76193d7c 2003-09-30 devnull int	_drawdebug;
  9 76193d7c 2003-09-30 devnull 
 10 76193d7c 2003-09-30 devnull static char deffontname[] = "*default*";
 11 76193d7c 2003-09-30 devnull Screen	*_screen;
 12 76193d7c 2003-09-30 devnull 
 13 b20f06ab 2004-12-26 devnull int		debuglockdisplay = 1;
 14 74dc60da 2006-06-25 devnull char	*winsize;
 15 76193d7c 2003-09-30 devnull 
 16 abe4cd41 2005-07-27 devnull /*
 17 76193d7c 2003-09-30 devnull static void
 18 76193d7c 2003-09-30 devnull drawshutdown(void)
 19 76193d7c 2003-09-30 devnull {
 20 76193d7c 2003-09-30 devnull 	Display *d;
 21 76193d7c 2003-09-30 devnull 
 22 76193d7c 2003-09-30 devnull 	d = display;
 23 76193d7c 2003-09-30 devnull 	if(d){
 24 76193d7c 2003-09-30 devnull 		display = nil;
 25 76193d7c 2003-09-30 devnull 		closedisplay(d);
 26 76193d7c 2003-09-30 devnull 	}
 27 76193d7c 2003-09-30 devnull }
 28 abe4cd41 2005-07-27 devnull */
 29 76193d7c 2003-09-30 devnull 
 30 76193d7c 2003-09-30 devnull int
 31 74dc60da 2006-06-25 devnull geninitdraw(char *devdir, void(*error)(Display*, char*), char *fontname, char *label, char *windir, int ref)
 32 76193d7c 2003-09-30 devnull {
 33 76193d7c 2003-09-30 devnull 	Subfont *df;
 34 76193d7c 2003-09-30 devnull 	char buf[128];
 35 76193d7c 2003-09-30 devnull 
 36 74dc60da 2006-06-25 devnull 	if(label == nil)
 37 74dc60da 2006-06-25 devnull 		label = argv0;
 38 74dc60da 2006-06-25 devnull 	display = _initdisplay(error, label);
 39 76193d7c 2003-09-30 devnull 	if(display == nil)
 40 76193d7c 2003-09-30 devnull 		return -1;
 41 76193d7c 2003-09-30 devnull 
 42 76193d7c 2003-09-30 devnull 	/*
 43 76193d7c 2003-09-30 devnull 	 * Set up default font
 44 76193d7c 2003-09-30 devnull 	 */
 45 76193d7c 2003-09-30 devnull 	df = getdefont(display);
 46 76193d7c 2003-09-30 devnull 	display->defaultsubfont = df;
 47 76193d7c 2003-09-30 devnull 	if(df == nil){
 48 76193d7c 2003-09-30 devnull 		fprint(2, "imageinit: can't open default subfont: %r\n");
 49 76193d7c 2003-09-30 devnull     Error:
 50 76193d7c 2003-09-30 devnull 		closedisplay(display);
 51 76193d7c 2003-09-30 devnull 		display = nil;
 52 76193d7c 2003-09-30 devnull 		return -1;
 53 76193d7c 2003-09-30 devnull 	}
 54 76193d7c 2003-09-30 devnull 	if(fontname == nil)
 55 74dc60da 2006-06-25 devnull 		fontname = getenv("font");
 56 76193d7c 2003-09-30 devnull 
 57 76193d7c 2003-09-30 devnull 	/*
 58 76193d7c 2003-09-30 devnull 	 * Build fonts with caches==depth of screen, for speed.
 59 76193d7c 2003-09-30 devnull 	 * If conversion were faster, we'd use 0 and save memory.
 60 76193d7c 2003-09-30 devnull 	 */
 61 76193d7c 2003-09-30 devnull 	if(fontname == nil){
 62 76193d7c 2003-09-30 devnull 		snprint(buf, sizeof buf, "%d %d\n0 %d\t%s\n", df->height, df->ascent,
 63 76193d7c 2003-09-30 devnull 			df->n-1, deffontname);
 64 74dc60da 2006-06-25 devnull //BUG: Need something better for this	installsubfont("*default*", df);
 65 76193d7c 2003-09-30 devnull 		font = buildfont(display, buf, deffontname);
 66 76193d7c 2003-09-30 devnull 		if(font == nil){
 67 74dc60da 2006-06-25 devnull 			fprint(2, "imageinit: can't open default font: %r\n");
 68 76193d7c 2003-09-30 devnull 			goto Error;
 69 76193d7c 2003-09-30 devnull 		}
 70 76193d7c 2003-09-30 devnull 	}else{
 71 76193d7c 2003-09-30 devnull 		font = openfont(display, fontname);	/* BUG: grey fonts */
 72 76193d7c 2003-09-30 devnull 		if(font == nil){
 73 74dc60da 2006-06-25 devnull 			fprint(2, "imageinit: can't open font %s: %r\n", fontname);
 74 76193d7c 2003-09-30 devnull 			goto Error;
 75 76193d7c 2003-09-30 devnull 		}
 76 76193d7c 2003-09-30 devnull 	}
 77 76193d7c 2003-09-30 devnull 	display->defaultfont = font;
 78 76193d7c 2003-09-30 devnull 
 79 670dd11a 2005-03-18 devnull 	_screen = allocscreen(display->image, display->white, 0);
 80 74dc60da 2006-06-25 devnull 	display->screenimage = display->image;	/* _allocwindow wants screenimage->chan */
 81 670dd11a 2005-03-18 devnull 	screen = _allocwindow(nil, _screen, display->image->r, Refnone, DWhite);
 82 74dc60da 2006-06-25 devnull 	if(screen == nil){
 83 74dc60da 2006-06-25 devnull 		fprint(2, "_allocwindow: %r\n");
 84 74dc60da 2006-06-25 devnull 		goto Error;
 85 74dc60da 2006-06-25 devnull 	}
 86 670dd11a 2005-03-18 devnull 	display->screenimage = screen;
 87 7ba8aa0c 2005-07-24 devnull 	draw(screen, screen->r, display->white, nil, ZP);
 88 670dd11a 2005-03-18 devnull 	flushimage(display, 1);
 89 670dd11a 2005-03-18 devnull 
 90 abe4cd41 2005-07-27 devnull 	/*
 91 abe4cd41 2005-07-27 devnull 	 * I don't see any reason to go away gracefully,
 92 abe4cd41 2005-07-27 devnull 	 * and if some other proc exits holding the display
 93 abe4cd41 2005-07-27 devnull 	 * lock, this atexit call never finishes.
 94 abe4cd41 2005-07-27 devnull 	 *
 95 abe4cd41 2005-07-27 devnull 	 * atexit(drawshutdown);
 96 abe4cd41 2005-07-27 devnull 	 */
 97 76193d7c 2003-09-30 devnull 	return 1;
 98 74dc60da 2006-06-25 devnull }
 99 74dc60da 2006-06-25 devnull 
100 74dc60da 2006-06-25 devnull int
101 74dc60da 2006-06-25 devnull initdraw(void (*error)(Display*, char*), char *fontname, char *label)
102 74dc60da 2006-06-25 devnull {
103 74dc60da 2006-06-25 devnull 	return geninitdraw("/dev", error, fontname, label, "/dev", Refnone);
104 74dc60da 2006-06-25 devnull }
105 74dc60da 2006-06-25 devnull 
106 74dc60da 2006-06-25 devnull extern int _freeimage1(Image*);
107 74dc60da 2006-06-25 devnull 
108 74dc60da 2006-06-25 devnull static Image*
109 74dc60da 2006-06-25 devnull getimage0(Display *d, Image *image)
110 74dc60da 2006-06-25 devnull {
111 74dc60da 2006-06-25 devnull 	char info[12*12+1];
112 74dc60da 2006-06-25 devnull 	uchar *a;
113 74dc60da 2006-06-25 devnull 	int n;
114 74dc60da 2006-06-25 devnull 
115 74dc60da 2006-06-25 devnull 	/*
116 74dc60da 2006-06-25 devnull 	 * If there's an old screen, it has id 0.  The 'J' request below
117 74dc60da 2006-06-25 devnull 	 * will try to install the new screen as id 0, so the old one 
118 74dc60da 2006-06-25 devnull 	 * must be freed first.
119 74dc60da 2006-06-25 devnull 	 */
120 74dc60da 2006-06-25 devnull 	if(image){
121 74dc60da 2006-06-25 devnull 		_freeimage1(image);
122 74dc60da 2006-06-25 devnull 		memset(image, 0, sizeof(Image));
123 74dc60da 2006-06-25 devnull 	}
124 74dc60da 2006-06-25 devnull 
125 74dc60da 2006-06-25 devnull 	a = bufimage(d, 2);
126 74dc60da 2006-06-25 devnull 	a[0] = 'J';
127 74dc60da 2006-06-25 devnull 	a[1] = 'I';
128 74dc60da 2006-06-25 devnull 	if(flushimage(d, 0) < 0){
129 74dc60da 2006-06-25 devnull 		fprint(2, "cannot read screen info: %r\n");
130 74dc60da 2006-06-25 devnull 		return nil;
131 74dc60da 2006-06-25 devnull 	}
132 74dc60da 2006-06-25 devnull 
133 74dc60da 2006-06-25 devnull 	n = _displayrddraw(d, info, sizeof info);
134 74dc60da 2006-06-25 devnull 	if(n != 12*12){
135 74dc60da 2006-06-25 devnull 		fprint(2, "short screen info\n");
136 74dc60da 2006-06-25 devnull 		return nil;
137 74dc60da 2006-06-25 devnull 	}
138 74dc60da 2006-06-25 devnull 
139 74dc60da 2006-06-25 devnull 	if(image == nil){
140 74dc60da 2006-06-25 devnull 		image = mallocz(sizeof(Image), 1);
141 74dc60da 2006-06-25 devnull 		if(image == nil){
142 74dc60da 2006-06-25 devnull 			fprint(2, "cannot allocate image: %r\n");
143 74dc60da 2006-06-25 devnull 			return nil;
144 74dc60da 2006-06-25 devnull 		}
145 74dc60da 2006-06-25 devnull 	}
146 74dc60da 2006-06-25 devnull 
147 74dc60da 2006-06-25 devnull 	image->display = d;
148 74dc60da 2006-06-25 devnull 	image->id = 0;
149 74dc60da 2006-06-25 devnull 	image->chan = strtochan(info+2*12);
150 74dc60da 2006-06-25 devnull 	image->depth = chantodepth(image->chan);
151 74dc60da 2006-06-25 devnull 	image->repl = atoi(info+3*12);
152 74dc60da 2006-06-25 devnull 	image->r.min.x = atoi(info+4*12);
153 74dc60da 2006-06-25 devnull 	image->r.min.y = atoi(info+5*12);
154 74dc60da 2006-06-25 devnull 	image->r.max.x = atoi(info+6*12);
155 74dc60da 2006-06-25 devnull 	image->r.max.y = atoi(info+7*12);
156 74dc60da 2006-06-25 devnull 	image->clipr.min.x = atoi(info+8*12);
157 74dc60da 2006-06-25 devnull 	image->clipr.min.y = atoi(info+9*12);
158 74dc60da 2006-06-25 devnull 	image->clipr.max.x = atoi(info+10*12);
159 74dc60da 2006-06-25 devnull 	image->clipr.max.y = atoi(info+11*12);
160 74dc60da 2006-06-25 devnull 	return image;
161 74dc60da 2006-06-25 devnull }
162 74dc60da 2006-06-25 devnull 
163 74dc60da 2006-06-25 devnull /*
164 74dc60da 2006-06-25 devnull  * Attach, or possibly reattach, to window.
165 74dc60da 2006-06-25 devnull  * If reattaching, maintain value of screen pointer.
166 74dc60da 2006-06-25 devnull  */
167 74dc60da 2006-06-25 devnull int
168 74dc60da 2006-06-25 devnull getwindow(Display *d, int ref)
169 74dc60da 2006-06-25 devnull {
170 74dc60da 2006-06-25 devnull 	Image *i, *oi;
171 74dc60da 2006-06-25 devnull 	
172 74dc60da 2006-06-25 devnull 	/* XXX check for destroyed? */
173 74dc60da 2006-06-25 devnull 	
174 74dc60da 2006-06-25 devnull 	/*
175 74dc60da 2006-06-25 devnull 	 * Libdraw promises not to change the value of "screen",
176 74dc60da 2006-06-25 devnull 	 * so we have to reuse the image structure
177 74dc60da 2006-06-25 devnull 	 * memory we already have.
178 74dc60da 2006-06-25 devnull 	 */
179 74dc60da 2006-06-25 devnull 	oi = d->image;
180 74dc60da 2006-06-25 devnull 	i = getimage0(d, oi);
181 74dc60da 2006-06-25 devnull 	if(i == nil)
182 74dc60da 2006-06-25 devnull 		sysfatal("getwindow failed");
183 74dc60da 2006-06-25 devnull 	d->image = i;
184 74dc60da 2006-06-25 devnull 	/* fprint(2, "getwindow %p -> %p\n", oi, i); */
185 74dc60da 2006-06-25 devnull 
186 74dc60da 2006-06-25 devnull 	freescreen(_screen);
187 74dc60da 2006-06-25 devnull 	_screen = allocscreen(i, d->white, 0);
188 74dc60da 2006-06-25 devnull 	_freeimage1(screen);
189 74dc60da 2006-06-25 devnull 	screen = _allocwindow(screen, _screen, i->r, ref, DWhite);
190 74dc60da 2006-06-25 devnull 	d->screenimage = screen;
191 74dc60da 2006-06-25 devnull 	return 0;
192 76193d7c 2003-09-30 devnull }
193 76193d7c 2003-09-30 devnull 
194 74dc60da 2006-06-25 devnull Display*
195 74dc60da 2006-06-25 devnull _initdisplay(void (*error)(Display*, char*), char *label)
196 74dc60da 2006-06-25 devnull {
197 74dc60da 2006-06-25 devnull 	Display *disp;
198 74dc60da 2006-06-25 devnull 	Image *image;
199 74dc60da 2006-06-25 devnull 
200 74dc60da 2006-06-25 devnull 	fmtinstall('P', Pfmt);
201 74dc60da 2006-06-25 devnull 	fmtinstall('R', Rfmt);
202 74dc60da 2006-06-25 devnull 
203 74dc60da 2006-06-25 devnull 	disp = mallocz(sizeof(Display), 1);
204 74dc60da 2006-06-25 devnull 	if(disp == nil){
205 74dc60da 2006-06-25 devnull     Error1:
206 74dc60da 2006-06-25 devnull 		return nil;
207 74dc60da 2006-06-25 devnull 	}
208 74dc60da 2006-06-25 devnull 	disp->srvfd = -1;
209 74dc60da 2006-06-25 devnull 	image = nil;
210 74dc60da 2006-06-25 devnull 	if(0){
211 74dc60da 2006-06-25 devnull     Error2:
212 74dc60da 2006-06-25 devnull 		free(image);
213 74dc60da 2006-06-25 devnull 		free(disp);
214 74dc60da 2006-06-25 devnull 		goto Error1;
215 74dc60da 2006-06-25 devnull 	}
216 74dc60da 2006-06-25 devnull 	disp->bufsize = 65500;
217 74dc60da 2006-06-25 devnull 	disp->buf = malloc(disp->bufsize+5);	/* +5 for flush message */
218 74dc60da 2006-06-25 devnull 	disp->bufp = disp->buf;
219 74dc60da 2006-06-25 devnull 	disp->error = error;
220 74dc60da 2006-06-25 devnull 	qlock(&disp->qlock);
221 74dc60da 2006-06-25 devnull 
222 74dc60da 2006-06-25 devnull 	if(disp->buf == nil)
223 74dc60da 2006-06-25 devnull 		goto Error2;
224 74dc60da 2006-06-25 devnull 	if(0){
225 74dc60da 2006-06-25 devnull     Error3:
226 74dc60da 2006-06-25 devnull 		free(disp->buf);
227 74dc60da 2006-06-25 devnull 		goto Error2;
228 74dc60da 2006-06-25 devnull 	}
229 74dc60da 2006-06-25 devnull 	
230 74dc60da 2006-06-25 devnull 	if(_displaymux(disp) < 0
231 74dc60da 2006-06-25 devnull 	|| _displayconnect(disp) < 0
232 74dc60da 2006-06-25 devnull 	|| _displayinit(disp, label, winsize) < 0)
233 74dc60da 2006-06-25 devnull 		goto Error3;
234 74dc60da 2006-06-25 devnull 	if(0){
235 74dc60da 2006-06-25 devnull     Error4:
236 74dc60da 2006-06-25 devnull 		close(disp->srvfd);
237 74dc60da 2006-06-25 devnull 		goto Error3;
238 74dc60da 2006-06-25 devnull 	}
239 74dc60da 2006-06-25 devnull 
240 74dc60da 2006-06-25 devnull 	image = getimage0(disp, nil);
241 74dc60da 2006-06-25 devnull 	if(image == nil)
242 74dc60da 2006-06-25 devnull 		goto Error4;
243 74dc60da 2006-06-25 devnull 	
244 74dc60da 2006-06-25 devnull 	disp->image = image;
245 74dc60da 2006-06-25 devnull 	disp->white = allocimage(disp, Rect(0, 0, 1, 1), GREY1, 1, DWhite);
246 74dc60da 2006-06-25 devnull 	disp->black = allocimage(disp, Rect(0, 0, 1, 1), GREY1, 1, DBlack);
247 74dc60da 2006-06-25 devnull 	if(disp->white == nil || disp->black == nil){
248 74dc60da 2006-06-25 devnull 		free(disp->white);
249 74dc60da 2006-06-25 devnull 		free(disp->black);
250 74dc60da 2006-06-25 devnull 		goto Error4;
251 74dc60da 2006-06-25 devnull 	}
252 74dc60da 2006-06-25 devnull 	
253 74dc60da 2006-06-25 devnull 	disp->opaque = disp->white;
254 74dc60da 2006-06-25 devnull 	disp->transparent = disp->black;
255 74dc60da 2006-06-25 devnull 
256 74dc60da 2006-06-25 devnull 	return disp;
257 74dc60da 2006-06-25 devnull }
258 74dc60da 2006-06-25 devnull 
259 76193d7c 2003-09-30 devnull /*
260 76193d7c 2003-09-30 devnull  * Call with d unlocked.
261 76193d7c 2003-09-30 devnull  * Note that disp->defaultfont and defaultsubfont are not freed here.
262 76193d7c 2003-09-30 devnull  */
263 76193d7c 2003-09-30 devnull void
264 76193d7c 2003-09-30 devnull closedisplay(Display *disp)
265 76193d7c 2003-09-30 devnull {
266 76193d7c 2003-09-30 devnull 	int fd;
267 76193d7c 2003-09-30 devnull 	char buf[128];
268 76193d7c 2003-09-30 devnull 
269 76193d7c 2003-09-30 devnull 	if(disp == nil)
270 76193d7c 2003-09-30 devnull 		return;
271 76193d7c 2003-09-30 devnull 	if(disp == display)
272 76193d7c 2003-09-30 devnull 		display = nil;
273 76193d7c 2003-09-30 devnull 	if(disp->oldlabel[0]){
274 76193d7c 2003-09-30 devnull 		snprint(buf, sizeof buf, "%s/label", disp->windir);
275 76193d7c 2003-09-30 devnull 		fd = open(buf, OWRITE);
276 76193d7c 2003-09-30 devnull 		if(fd >= 0){
277 76193d7c 2003-09-30 devnull 			write(fd, disp->oldlabel, strlen(disp->oldlabel));
278 76193d7c 2003-09-30 devnull 			close(fd);
279 76193d7c 2003-09-30 devnull 		}
280 76193d7c 2003-09-30 devnull 	}
281 76193d7c 2003-09-30 devnull 
282 76193d7c 2003-09-30 devnull 	free(disp->devdir);
283 76193d7c 2003-09-30 devnull 	free(disp->windir);
284 297cded7 2005-12-29 devnull 	if(disp->white)
285 297cded7 2005-12-29 devnull 		freeimage(disp->white);
286 297cded7 2005-12-29 devnull 	if(disp->black)
287 297cded7 2005-12-29 devnull 		freeimage(disp->black);
288 74dc60da 2006-06-25 devnull 	if(disp->srvfd >= 0)
289 74dc60da 2006-06-25 devnull 		close(disp->srvfd);
290 76193d7c 2003-09-30 devnull 	free(disp);
291 76193d7c 2003-09-30 devnull }
292 76193d7c 2003-09-30 devnull 
293 76193d7c 2003-09-30 devnull void
294 76193d7c 2003-09-30 devnull lockdisplay(Display *disp)
295 76193d7c 2003-09-30 devnull {
296 76193d7c 2003-09-30 devnull 	if(debuglockdisplay){
297 76193d7c 2003-09-30 devnull 		/* avoid busy looping; it's rare we collide anyway */
298 76193d7c 2003-09-30 devnull 		while(!canqlock(&disp->qlock)){
299 76193d7c 2003-09-30 devnull 			fprint(1, "proc %d waiting for display lock...\n", getpid());
300 76193d7c 2003-09-30 devnull 			sleep(1000);
301 76193d7c 2003-09-30 devnull 		}
302 76193d7c 2003-09-30 devnull 	}else
303 76193d7c 2003-09-30 devnull 		qlock(&disp->qlock);
304 76193d7c 2003-09-30 devnull }
305 76193d7c 2003-09-30 devnull 
306 76193d7c 2003-09-30 devnull void
307 76193d7c 2003-09-30 devnull unlockdisplay(Display *disp)
308 76193d7c 2003-09-30 devnull {
309 76193d7c 2003-09-30 devnull 	qunlock(&disp->qlock);
310 76193d7c 2003-09-30 devnull }
311 76193d7c 2003-09-30 devnull 
312 76193d7c 2003-09-30 devnull void
313 76193d7c 2003-09-30 devnull drawerror(Display *d, char *s)
314 76193d7c 2003-09-30 devnull {
315 76193d7c 2003-09-30 devnull 	char err[ERRMAX];
316 76193d7c 2003-09-30 devnull 
317 76193d7c 2003-09-30 devnull 	if(d->error)
318 76193d7c 2003-09-30 devnull 		d->error(d, s);
319 76193d7c 2003-09-30 devnull 	else{
320 76193d7c 2003-09-30 devnull 		errstr(err, sizeof err);
321 76193d7c 2003-09-30 devnull 		fprint(2, "draw: %s: %s\n", s, err);
322 76193d7c 2003-09-30 devnull 		exits(s);
323 76193d7c 2003-09-30 devnull 	}
324 76193d7c 2003-09-30 devnull }
325 76193d7c 2003-09-30 devnull 
326 76193d7c 2003-09-30 devnull static
327 76193d7c 2003-09-30 devnull int
328 76193d7c 2003-09-30 devnull doflush(Display *d)
329 76193d7c 2003-09-30 devnull {
330 76193d7c 2003-09-30 devnull 	int n;
331 76193d7c 2003-09-30 devnull 
332 76193d7c 2003-09-30 devnull 	n = d->bufp-d->buf;
333 76193d7c 2003-09-30 devnull 	if(n <= 0)
334 76193d7c 2003-09-30 devnull 		return 1;
335 76193d7c 2003-09-30 devnull 
336 74dc60da 2006-06-25 devnull 	if(_displaywrdraw(d, d->buf, n) != n){
337 76193d7c 2003-09-30 devnull 		if(_drawdebug)
338 76193d7c 2003-09-30 devnull 			fprint(2, "flushimage fail: d=%p: %r\n", d); /**/
339 76193d7c 2003-09-30 devnull 		d->bufp = d->buf;	/* might as well; chance of continuing */
340 76193d7c 2003-09-30 devnull 		return -1;
341 76193d7c 2003-09-30 devnull 	}
342 76193d7c 2003-09-30 devnull 	d->bufp = d->buf;
343 76193d7c 2003-09-30 devnull 	return 1;
344 76193d7c 2003-09-30 devnull }
345 76193d7c 2003-09-30 devnull 
346 76193d7c 2003-09-30 devnull int
347 76193d7c 2003-09-30 devnull flushimage(Display *d, int visible)
348 76193d7c 2003-09-30 devnull {
349 76193d7c 2003-09-30 devnull 	if(visible){
350 76193d7c 2003-09-30 devnull 		*d->bufp++ = 'v';	/* five bytes always reserved for this */
351 76193d7c 2003-09-30 devnull 		if(d->_isnewdisplay){
352 76193d7c 2003-09-30 devnull 			BPLONG(d->bufp, d->screenimage->id);
353 76193d7c 2003-09-30 devnull 			d->bufp += 4;
354 76193d7c 2003-09-30 devnull 		}
355 76193d7c 2003-09-30 devnull 	}
356 76193d7c 2003-09-30 devnull 	return doflush(d);
357 76193d7c 2003-09-30 devnull }
358 76193d7c 2003-09-30 devnull 
359 76193d7c 2003-09-30 devnull uchar*
360 76193d7c 2003-09-30 devnull bufimage(Display *d, int n)
361 76193d7c 2003-09-30 devnull {
362 76193d7c 2003-09-30 devnull 	uchar *p;
363 76193d7c 2003-09-30 devnull 
364 148f25d3 2005-11-07 devnull 	if(n<0 || d == nil || n>d->bufsize){
365 148f25d3 2005-11-07 devnull 		abort();
366 76193d7c 2003-09-30 devnull 		werrstr("bad count in bufimage");
367 76193d7c 2003-09-30 devnull 		return 0;
368 76193d7c 2003-09-30 devnull 	}
369 76193d7c 2003-09-30 devnull 	if(d->bufp+n > d->buf+d->bufsize)
370 76193d7c 2003-09-30 devnull 		if(doflush(d) < 0)
371 76193d7c 2003-09-30 devnull 			return 0;
372 76193d7c 2003-09-30 devnull 	p = d->bufp;
373 76193d7c 2003-09-30 devnull 	d->bufp += n;
374 76193d7c 2003-09-30 devnull 	return p;
375 76193d7c 2003-09-30 devnull }
376 76193d7c 2003-09-30 devnull