1 24c02865 2005-01-04 devnull /*
  2 24c02865 2005-01-04 devnull  * ps.c
  3 24c02865 2005-01-04 devnull  * 
  4 24c02865 2005-01-04 devnull  * provide postscript file reading support for page
  5 24c02865 2005-01-04 devnull  */
  6 24c02865 2005-01-04 devnull 
  7 24c02865 2005-01-04 devnull #include <u.h>
  8 24c02865 2005-01-04 devnull #include <libc.h>
  9 24c02865 2005-01-04 devnull #include <draw.h>
 10 24c02865 2005-01-04 devnull #include <event.h>
 11 24c02865 2005-01-04 devnull #include <bio.h>
 12 24c02865 2005-01-04 devnull #include <ctype.h>
 13 24c02865 2005-01-04 devnull #include "page.h"
 14 24c02865 2005-01-04 devnull 
 15 24c02865 2005-01-04 devnull typedef struct PSInfo	PSInfo;
 16 24c02865 2005-01-04 devnull typedef struct Page	Page;
 17 24c02865 2005-01-04 devnull 	
 18 24c02865 2005-01-04 devnull struct Page {
 19 24c02865 2005-01-04 devnull 	char *name;
 20 24c02865 2005-01-04 devnull 	int offset;			/* offset of page beginning within file */
 21 24c02865 2005-01-04 devnull };
 22 24c02865 2005-01-04 devnull 
 23 24c02865 2005-01-04 devnull struct PSInfo {
 24 24c02865 2005-01-04 devnull 	GSInfo gs;
 25 24c02865 2005-01-04 devnull 	Rectangle bbox;	/* default bounding box */
 26 24c02865 2005-01-04 devnull 	Page *page;
 27 24c02865 2005-01-04 devnull 	int npage;
 28 24c02865 2005-01-04 devnull 	int clueless;	/* don't know where page boundaries are */
 29 24c02865 2005-01-04 devnull 	long psoff;	/* location of %! in file */
 30 24c02865 2005-01-04 devnull 	char ctm[256];
 31 24c02865 2005-01-04 devnull };
 32 24c02865 2005-01-04 devnull 
 33 24c02865 2005-01-04 devnull static int	pswritepage(Document *d, int fd, int page);
 34 24c02865 2005-01-04 devnull static Image*	psdrawpage(Document *d, int page);
 35 24c02865 2005-01-04 devnull static char*	pspagename(Document*, int);
 36 24c02865 2005-01-04 devnull 
 37 24c02865 2005-01-04 devnull #define R(r) (r).min.x, (r).min.y, (r).max.x, (r).max.y
 38 24c02865 2005-01-04 devnull Rectangle
 39 24c02865 2005-01-04 devnull rdbbox(char *p)
 40 24c02865 2005-01-04 devnull {
 41 24c02865 2005-01-04 devnull 	Rectangle r;
 42 24c02865 2005-01-04 devnull 	int a;
 43 24c02865 2005-01-04 devnull 	char *f[4];
 44 24c02865 2005-01-04 devnull 	while(*p == ':' || *p == ' ' || *p == '\t')
 45 24c02865 2005-01-04 devnull 		p++;
 46 24c02865 2005-01-04 devnull 	if(tokenize(p, f, 4) != 4)
 47 24c02865 2005-01-04 devnull 		return Rect(0,0,0,0);
 48 24c02865 2005-01-04 devnull 	r = Rect(atoi(f[0]), atoi(f[1]), atoi(f[2]), atoi(f[3]));
 49 24c02865 2005-01-04 devnull 	r = canonrect(r);
 50 24c02865 2005-01-04 devnull 	if(Dx(r) <= 0 || Dy(r) <= 0)
 51 24c02865 2005-01-04 devnull 		return Rect(0,0,0,0);
 52 24c02865 2005-01-04 devnull 
 53 24c02865 2005-01-04 devnull 	if(truetoboundingbox)
 54 24c02865 2005-01-04 devnull 		return r;
 55 24c02865 2005-01-04 devnull 
 56 24c02865 2005-01-04 devnull 	/* initdraw not called yet, can't use %R */
 57 24c02865 2005-01-04 devnull 	if(chatty) fprint(2, "[%d %d %d %d] -> ", R(r));
 58 24c02865 2005-01-04 devnull 	/*
 59 24c02865 2005-01-04 devnull 	 * attempt to sniff out A4, 8½×11, others
 60 24c02865 2005-01-04 devnull 	 * A4 is 596×842
 61 24c02865 2005-01-04 devnull 	 * 8½×11 is 612×792
 62 24c02865 2005-01-04 devnull 	 */
 63 24c02865 2005-01-04 devnull 
 64 24c02865 2005-01-04 devnull 	a = Dx(r)*Dy(r);
 65 24c02865 2005-01-04 devnull 	if(a < 300*300){	/* really small, probably supposed to be */
 66 24c02865 2005-01-04 devnull 		/* empty */
 67 24c02865 2005-01-04 devnull 	} else if(Dx(r) <= 596 && r.max.x <= 596 && Dy(r) > 792 && Dy(r) <= 842 && r.max.y <= 842)	/* A4 */
 68 24c02865 2005-01-04 devnull 		r = Rect(0, 0, 596, 842);
 69 24c02865 2005-01-04 devnull 	else {	/* cast up to 8½×11 */
 70 24c02865 2005-01-04 devnull 		if(Dx(r) <= 612 && r.max.x <= 612){
 71 24c02865 2005-01-04 devnull 			r.min.x = 0;
 72 24c02865 2005-01-04 devnull 			r.max.x = 612;
 73 24c02865 2005-01-04 devnull 		}
 74 24c02865 2005-01-04 devnull 		if(Dy(r) <= 792 && r.max.y <= 792){
 75 24c02865 2005-01-04 devnull 			r.min.y = 0;
 76 24c02865 2005-01-04 devnull 			r.max.y = 792;
 77 24c02865 2005-01-04 devnull 		}
 78 24c02865 2005-01-04 devnull 	}
 79 24c02865 2005-01-04 devnull 	if(chatty) fprint(2, "[%d %d %d %d]\n", R(r));
 80 24c02865 2005-01-04 devnull 	return r;
 81 24c02865 2005-01-04 devnull }
 82 24c02865 2005-01-04 devnull 
 83 24c02865 2005-01-04 devnull #define RECT(X) X.min.x, X.min.y, X.max.x, X.max.y
 84 24c02865 2005-01-04 devnull 
 85 24c02865 2005-01-04 devnull int
 86 24c02865 2005-01-04 devnull prefix(char *x, char *y)
 87 24c02865 2005-01-04 devnull {
 88 24c02865 2005-01-04 devnull 	return strncmp(x, y, strlen(y)) == 0;
 89 24c02865 2005-01-04 devnull }
 90 24c02865 2005-01-04 devnull 
 91 24c02865 2005-01-04 devnull /*
 92 24c02865 2005-01-04 devnull  * document ps is really being printed as n-up pages.
 93 24c02865 2005-01-04 devnull  * we need to treat every n pages as 1.
 94 24c02865 2005-01-04 devnull  */
 95 24c02865 2005-01-04 devnull void
 96 24c02865 2005-01-04 devnull repaginate(PSInfo *ps, int n)
 97 24c02865 2005-01-04 devnull {
 98 24c02865 2005-01-04 devnull 	int i, np, onp;
 99 24c02865 2005-01-04 devnull 	Page *page;
100 24c02865 2005-01-04 devnull 
101 24c02865 2005-01-04 devnull 	page = ps->page;
102 24c02865 2005-01-04 devnull 	onp = ps->npage;
103 24c02865 2005-01-04 devnull 	np = (ps->npage+n-1)/n;
104 24c02865 2005-01-04 devnull 
105 24c02865 2005-01-04 devnull 	if(chatty) {
106 24c02865 2005-01-04 devnull 		for(i=0; i<=onp+1; i++)
107 24c02865 2005-01-04 devnull 			print("page %d: %d\n", i, page[i].offset);
108 24c02865 2005-01-04 devnull 	}
109 24c02865 2005-01-04 devnull 
110 24c02865 2005-01-04 devnull 	for(i=0; i<np; i++)
111 24c02865 2005-01-04 devnull 		page[i] = page[n*i];
112 24c02865 2005-01-04 devnull 
113 24c02865 2005-01-04 devnull 	/* trailer */
114 24c02865 2005-01-04 devnull 	page[np] = page[onp];
115 24c02865 2005-01-04 devnull 
116 24c02865 2005-01-04 devnull 	/* EOF */
117 24c02865 2005-01-04 devnull 	page[np+1] = page[onp+1];
118 24c02865 2005-01-04 devnull 
119 24c02865 2005-01-04 devnull 	ps->npage = np;
120 24c02865 2005-01-04 devnull 
121 24c02865 2005-01-04 devnull 	if(chatty) {
122 24c02865 2005-01-04 devnull 		for(i=0; i<=np+1; i++)
123 24c02865 2005-01-04 devnull 			print("page %d: %d\n", i, page[i].offset);
124 24c02865 2005-01-04 devnull 	}
125 24c02865 2005-01-04 devnull 
126 24c02865 2005-01-04 devnull }
127 24c02865 2005-01-04 devnull 
128 24c02865 2005-01-04 devnull Document*
129 24c02865 2005-01-04 devnull initps(Biobuf *b, int argc, char **argv, uchar *buf, int nbuf)
130 24c02865 2005-01-04 devnull {
131 24c02865 2005-01-04 devnull 	Document *d;
132 24c02865 2005-01-04 devnull 	PSInfo *ps;
133 24c02865 2005-01-04 devnull 	char *p;
134 24c02865 2005-01-04 devnull 	char *q, *r;
135 24c02865 2005-01-04 devnull 	char eol;
136 24c02865 2005-01-04 devnull 	char *nargv[1];
137 24c02865 2005-01-04 devnull 	char fdbuf[20];
138 24c02865 2005-01-04 devnull 	char tmp[32];
139 24c02865 2005-01-04 devnull 	int fd;
140 24c02865 2005-01-04 devnull 	int i;
141 24c02865 2005-01-04 devnull 	int incomments;
142 24c02865 2005-01-04 devnull 	int cantranslate;
143 24c02865 2005-01-04 devnull 	int trailer=0;
144 24c02865 2005-01-04 devnull 	int nesting=0;
145 24c02865 2005-01-04 devnull 	int dumb=0;
146 24c02865 2005-01-04 devnull 	int landscape=0;
147 24c02865 2005-01-04 devnull 	long psoff;
148 24c02865 2005-01-04 devnull 	long npage, mpage;
149 24c02865 2005-01-04 devnull 	Page *page;
150 24c02865 2005-01-04 devnull 	Rectangle bbox = Rect(0,0,0,0);
151 24c02865 2005-01-04 devnull 
152 24c02865 2005-01-04 devnull 	if(argc > 1) {
153 24c02865 2005-01-04 devnull 		fprint(2, "can only view one ps file at a time\n");
154 24c02865 2005-01-04 devnull 		return nil;
155 24c02865 2005-01-04 devnull 	}
156 24c02865 2005-01-04 devnull 
157 24c02865 2005-01-04 devnull 	fprint(2, "reading through postscript...\n");
158 24c02865 2005-01-04 devnull 	if(b == nil){	/* standard input; spool to disk (ouch) */
159 24c02865 2005-01-04 devnull 		fd = spooltodisk(buf, nbuf, nil);
160 24c02865 2005-01-04 devnull 		sprint(fdbuf, "/fd/%d", fd);
161 24c02865 2005-01-04 devnull 		b = Bopen(fdbuf, OREAD);
162 24c02865 2005-01-04 devnull 		if(b == nil){
163 24c02865 2005-01-04 devnull 			fprint(2, "cannot open disk spool file\n");
164 24c02865 2005-01-04 devnull 			wexits("Bopen temp");
165 24c02865 2005-01-04 devnull 		}
166 24c02865 2005-01-04 devnull 		nargv[0] = fdbuf;
167 24c02865 2005-01-04 devnull 		argv = nargv;
168 24c02865 2005-01-04 devnull 	}
169 24c02865 2005-01-04 devnull 
170 24c02865 2005-01-04 devnull 	/* find %!, perhaps after PCL nonsense */
171 24c02865 2005-01-04 devnull 	Bseek(b, 0, 0);
172 24c02865 2005-01-04 devnull 	psoff = 0;
173 24c02865 2005-01-04 devnull 	eol = 0;
174 24c02865 2005-01-04 devnull 	for(i=0; i<16; i++){
175 24c02865 2005-01-04 devnull 		psoff = Boffset(b);
176 24c02865 2005-01-04 devnull 		if(!(p = Brdline(b, eol='\n')) && !(p = Brdline(b, eol='\r'))) {
177 24c02865 2005-01-04 devnull 			fprint(2, "cannot find end of first line\n");
178 24c02865 2005-01-04 devnull 			wexits("initps");
179 24c02865 2005-01-04 devnull 		}
180 24c02865 2005-01-04 devnull 		if(p[0]=='\x1B')
181 24c02865 2005-01-04 devnull 			p++, psoff++;
182 24c02865 2005-01-04 devnull 		if(p[0] == '%' && p[1] == '!')
183 24c02865 2005-01-04 devnull 			break;
184 24c02865 2005-01-04 devnull 	}
185 24c02865 2005-01-04 devnull 	if(i == 16){
186 24c02865 2005-01-04 devnull 		werrstr("not ps");
187 24c02865 2005-01-04 devnull 		return nil;
188 24c02865 2005-01-04 devnull 	}
189 24c02865 2005-01-04 devnull 
190 24c02865 2005-01-04 devnull 	/* page counting */
191 24c02865 2005-01-04 devnull 	npage = 0;
192 24c02865 2005-01-04 devnull 	mpage = 16;
193 24c02865 2005-01-04 devnull 	page = emalloc(mpage*sizeof(*page));
194 24c02865 2005-01-04 devnull 	memset(page, 0, mpage*sizeof(*page));
195 24c02865 2005-01-04 devnull 
196 24c02865 2005-01-04 devnull 	cantranslate = goodps;
197 24c02865 2005-01-04 devnull 	incomments = 1;
198 24c02865 2005-01-04 devnull Keepreading:
199 24c02865 2005-01-04 devnull 	while(p = Brdline(b, eol)) {
200 24c02865 2005-01-04 devnull 		if(p[0] == '%')
201 24c02865 2005-01-04 devnull 			if(chatty) fprint(2, "ps %.*s\n", utfnlen(p, Blinelen(b)-1), p);
202 24c02865 2005-01-04 devnull 		if(npage == mpage) {
203 24c02865 2005-01-04 devnull 			mpage *= 2;
204 24c02865 2005-01-04 devnull 			page = erealloc(page, mpage*sizeof(*page));
205 24c02865 2005-01-04 devnull 			memset(&page[npage], 0, npage*sizeof(*page));
206 24c02865 2005-01-04 devnull 		}
207 24c02865 2005-01-04 devnull 
208 24c02865 2005-01-04 devnull 		if(p[0] != '%' || p[1] != '%')
209 24c02865 2005-01-04 devnull 			continue;
210 24c02865 2005-01-04 devnull 
211 24c02865 2005-01-04 devnull 		if(prefix(p, "%%BeginDocument")) {
212 24c02865 2005-01-04 devnull 			nesting++;
213 24c02865 2005-01-04 devnull 			continue;
214 24c02865 2005-01-04 devnull 		}
215 24c02865 2005-01-04 devnull 		if(nesting > 0 && prefix(p, "%%EndDocument")) {
216 24c02865 2005-01-04 devnull 			nesting--;
217 24c02865 2005-01-04 devnull 			continue;
218 24c02865 2005-01-04 devnull 		}
219 24c02865 2005-01-04 devnull 		if(nesting)
220 24c02865 2005-01-04 devnull 			continue;
221 24c02865 2005-01-04 devnull 
222 24c02865 2005-01-04 devnull 		if(prefix(p, "%%EndComment")) {
223 24c02865 2005-01-04 devnull 			incomments = 0;
224 24c02865 2005-01-04 devnull 			continue;
225 24c02865 2005-01-04 devnull 		}
226 24c02865 2005-01-04 devnull 		if(reverse == -1 && prefix(p, "%%PageOrder")) {
227 24c02865 2005-01-04 devnull 			/* glean whether we should reverse the viewing order */
228 24c02865 2005-01-04 devnull 			p[Blinelen(b)-1] = 0;
229 24c02865 2005-01-04 devnull 			if(strstr(p, "Ascend"))
230 24c02865 2005-01-04 devnull 				reverse = 0;
231 24c02865 2005-01-04 devnull 			else if(strstr(p, "Descend"))
232 24c02865 2005-01-04 devnull 				reverse = 1;
233 24c02865 2005-01-04 devnull 			else if(strstr(p, "Special"))
234 24c02865 2005-01-04 devnull 				dumb = 1;
235 24c02865 2005-01-04 devnull 			p[Blinelen(b)-1] = '\n';
236 24c02865 2005-01-04 devnull 			continue;
237 24c02865 2005-01-04 devnull 		} else if(prefix(p, "%%Trailer")) {
238 24c02865 2005-01-04 devnull 			incomments = 1;
239 24c02865 2005-01-04 devnull 			page[npage].offset = Boffset(b)-Blinelen(b);
240 24c02865 2005-01-04 devnull 			trailer = 1;
241 24c02865 2005-01-04 devnull 			continue;
242 24c02865 2005-01-04 devnull 		} else if(incomments && prefix(p, "%%Orientation")) {
243 24c02865 2005-01-04 devnull 			if(strstr(p, "Landscape"))
244 24c02865 2005-01-04 devnull 				landscape = 1;
245 24c02865 2005-01-04 devnull 		} else if(incomments && Dx(bbox)==0 && prefix(p, q="%%BoundingBox")) {
246 24c02865 2005-01-04 devnull 			bbox = rdbbox(p+strlen(q)+1);
247 24c02865 2005-01-04 devnull 			if(chatty)
248 24c02865 2005-01-04 devnull 				/* can't use %R because haven't initdraw() */
249 24c02865 2005-01-04 devnull 				fprint(2, "document bbox [%d %d %d %d]\n",
250 24c02865 2005-01-04 devnull 					RECT(bbox));
251 24c02865 2005-01-04 devnull 			continue;
252 24c02865 2005-01-04 devnull 		}
253 24c02865 2005-01-04 devnull 
254 24c02865 2005-01-04 devnull 		/*
255 24c02865 2005-01-04 devnull 		 * If they use the initgraphics command, we can't play our translation tricks.
256 24c02865 2005-01-04 devnull 		 */
257 24c02865 2005-01-04 devnull 		p[Blinelen(b)-1] = 0;
258 24c02865 2005-01-04 devnull 		if((q=strstr(p, "initgraphics")) && ((r=strchr(p, '%'))==nil || r > q))
259 24c02865 2005-01-04 devnull 			cantranslate = 0;
260 24c02865 2005-01-04 devnull 		p[Blinelen(b)-1] = eol;
261 24c02865 2005-01-04 devnull 
262 24c02865 2005-01-04 devnull 		if(!prefix(p, "%%Page:"))
263 24c02865 2005-01-04 devnull 			continue;
264 24c02865 2005-01-04 devnull 
265 24c02865 2005-01-04 devnull 		/* 
266 24c02865 2005-01-04 devnull 		 * figure out of the %%Page: line contains a page number
267 24c02865 2005-01-04 devnull 		 * or some other page description to use in the menu bar.
268 24c02865 2005-01-04 devnull 		 * 
269 24c02865 2005-01-04 devnull 		 * lines look like %%Page: x y or %%Page: x
270 24c02865 2005-01-04 devnull 		 * we prefer just x, and will generate our
271 24c02865 2005-01-04 devnull 		 * own if necessary.
272 24c02865 2005-01-04 devnull 		 */
273 24c02865 2005-01-04 devnull 		p[Blinelen(b)-1] = 0;
274 24c02865 2005-01-04 devnull 		if(chatty) fprint(2, "page %s\n", p);
275 24c02865 2005-01-04 devnull 		r = p+7;
276 24c02865 2005-01-04 devnull 		while(*r == ' ' || *r == '\t')
277 24c02865 2005-01-04 devnull 			r++;
278 24c02865 2005-01-04 devnull 		q = r;
279 24c02865 2005-01-04 devnull 		while(*q && *q != ' ' && *q != '\t')
280 24c02865 2005-01-04 devnull 			q++;
281 24c02865 2005-01-04 devnull 		free(page[npage].name);
282 24c02865 2005-01-04 devnull 		if(*r) {
283 24c02865 2005-01-04 devnull 			if(*r == '"' && *q == '"')
284 24c02865 2005-01-04 devnull 				r++, q--;
285 24c02865 2005-01-04 devnull 			if(*q)
286 24c02865 2005-01-04 devnull 				*q = 0;
287 24c02865 2005-01-04 devnull 			page[npage].name = estrdup(r);
288 24c02865 2005-01-04 devnull 			*q = 'x';
289 24c02865 2005-01-04 devnull 		} else {
290 24c02865 2005-01-04 devnull 			snprint(tmp, sizeof tmp, "p %ld", npage+1);
291 24c02865 2005-01-04 devnull 			page[npage].name = estrdup(tmp);
292 24c02865 2005-01-04 devnull 		}
293 24c02865 2005-01-04 devnull 
294 24c02865 2005-01-04 devnull 		/*
295 24c02865 2005-01-04 devnull 		 * store the offset info for later viewing
296 24c02865 2005-01-04 devnull 		 */
297 24c02865 2005-01-04 devnull 		trailer = 0;
298 24c02865 2005-01-04 devnull 		p[Blinelen(b)-1] = eol;
299 24c02865 2005-01-04 devnull 		page[npage++].offset = Boffset(b)-Blinelen(b);
300 24c02865 2005-01-04 devnull 	}
301 24c02865 2005-01-04 devnull 	if(Blinelen(b) > 0){
302 24c02865 2005-01-04 devnull 		fprint(2, "page: linelen %d\n", Blinelen(b));
303 24c02865 2005-01-04 devnull 		Bseek(b, Blinelen(b), 1);
304 24c02865 2005-01-04 devnull 		goto Keepreading;
305 24c02865 2005-01-04 devnull 	}
306 24c02865 2005-01-04 devnull 
307 24c02865 2005-01-04 devnull 	if(Dx(bbox) == 0 || Dy(bbox) == 0)
308 24c02865 2005-01-04 devnull 		bbox = Rect(0,0,612,792);	/* 8½×11 */
309 24c02865 2005-01-04 devnull 	/*
310 24c02865 2005-01-04 devnull 	 * if we didn't find any pages, assume the document
311 24c02865 2005-01-04 devnull 	 * is one big page
312 24c02865 2005-01-04 devnull 	 */
313 24c02865 2005-01-04 devnull 	if(npage == 0) {
314 24c02865 2005-01-04 devnull 		dumb = 1;
315 24c02865 2005-01-04 devnull 		if(chatty) fprint(2, "don't know where pages are\n");
316 24c02865 2005-01-04 devnull 		reverse = 0;
317 24c02865 2005-01-04 devnull 		goodps = 0;
318 24c02865 2005-01-04 devnull 		trailer = 0;
319 24c02865 2005-01-04 devnull 		page[npage].name = "p 1";
320 24c02865 2005-01-04 devnull 		page[npage++].offset = 0;
321 24c02865 2005-01-04 devnull 	}
322 24c02865 2005-01-04 devnull 
323 24c02865 2005-01-04 devnull 	if(npage+2 > mpage) {
324 24c02865 2005-01-04 devnull 		mpage += 2;
325 24c02865 2005-01-04 devnull 		page = erealloc(page, mpage*sizeof(*page));
326 24c02865 2005-01-04 devnull 		memset(&page[mpage-2], 0, 2*sizeof(*page));
327 24c02865 2005-01-04 devnull 	}
328 24c02865 2005-01-04 devnull 
329 24c02865 2005-01-04 devnull 	if(!trailer)
330 24c02865 2005-01-04 devnull 		page[npage].offset = Boffset(b);
331 24c02865 2005-01-04 devnull 
332 24c02865 2005-01-04 devnull 	Bseek(b, 0, 2); /* EOF */
333 24c02865 2005-01-04 devnull 	page[npage+1].offset = Boffset(b);
334 24c02865 2005-01-04 devnull 
335 24c02865 2005-01-04 devnull 	d = emalloc(sizeof(*d));
336 24c02865 2005-01-04 devnull 	ps = emalloc(sizeof(*ps));
337 24c02865 2005-01-04 devnull 	ps->page = page;
338 24c02865 2005-01-04 devnull 	ps->npage = npage;
339 24c02865 2005-01-04 devnull 	ps->bbox = bbox;
340 24c02865 2005-01-04 devnull 	ps->psoff = psoff;
341 24c02865 2005-01-04 devnull 
342 24c02865 2005-01-04 devnull 	d->extra = ps;
343 24c02865 2005-01-04 devnull 	d->npage = ps->npage;
344 24c02865 2005-01-04 devnull 	d->b = b;
345 24c02865 2005-01-04 devnull 	d->drawpage = psdrawpage;
346 24c02865 2005-01-04 devnull 	d->pagename = pspagename;
347 24c02865 2005-01-04 devnull 
348 24c02865 2005-01-04 devnull 	d->fwdonly = ps->clueless = dumb;
349 24c02865 2005-01-04 devnull 	d->docname = argv[0];
350 24c02865 2005-01-04 devnull 
351 24c02865 2005-01-04 devnull 	if(spawngs(&ps->gs) < 0)
352 24c02865 2005-01-04 devnull 		return nil;
353 24c02865 2005-01-04 devnull 
354 24c02865 2005-01-04 devnull 	if(!cantranslate)
355 24c02865 2005-01-04 devnull 		bbox.min = ZP;
356 24c02865 2005-01-04 devnull 	setdim(&ps->gs, bbox, ppi, landscape);
357 24c02865 2005-01-04 devnull 
358 24c02865 2005-01-04 devnull 	if(goodps){
359 24c02865 2005-01-04 devnull 		/*
360 24c02865 2005-01-04 devnull 		 * We want to only send the page (i.e. not header and trailer) information
361 24c02865 2005-01-04 devnull 	 	 * for each page, so initialize the device by sending the header now.
362 24c02865 2005-01-04 devnull 		 */
363 24c02865 2005-01-04 devnull 		pswritepage(d, ps->gs.gsfd, -1);
364 24c02865 2005-01-04 devnull 		waitgs(&ps->gs);
365 24c02865 2005-01-04 devnull 	}
366 24c02865 2005-01-04 devnull 
367 24c02865 2005-01-04 devnull 	if(dumb) {
368 24c02865 2005-01-04 devnull 		fprint(ps->gs.gsfd, "(%s) run\n", argv[0]);
369 24c02865 2005-01-04 devnull 		fprint(ps->gs.gsfd, "(/fd/3) (w) file dup (THIS IS NOT A PLAN9 BITMAP 01234567890123456789012345678901234567890123456789\\n) writestring flushfile\n");
370 24c02865 2005-01-04 devnull 	}
371 24c02865 2005-01-04 devnull 
372 24c02865 2005-01-04 devnull 	ps->bbox = bbox;
373 24c02865 2005-01-04 devnull 
374 24c02865 2005-01-04 devnull 	return d;
375 24c02865 2005-01-04 devnull }
376 24c02865 2005-01-04 devnull 
377 24c02865 2005-01-04 devnull static int
378 24c02865 2005-01-04 devnull pswritepage(Document *d, int fd, int page)
379 24c02865 2005-01-04 devnull {
380 24c02865 2005-01-04 devnull 	Biobuf *b = d->b;
381 24c02865 2005-01-04 devnull 	PSInfo *ps = d->extra;
382 24c02865 2005-01-04 devnull 	int t, n, i;
383 24c02865 2005-01-04 devnull 	long begin, end;
384 24c02865 2005-01-04 devnull 	char buf[8192];
385 24c02865 2005-01-04 devnull 
386 24c02865 2005-01-04 devnull 	if(page == -1)
387 24c02865 2005-01-04 devnull 		begin = ps->psoff;
388 24c02865 2005-01-04 devnull 	else
389 24c02865 2005-01-04 devnull 		begin = ps->page[page].offset;
390 24c02865 2005-01-04 devnull 
391 24c02865 2005-01-04 devnull 	end = ps->page[page+1].offset;
392 24c02865 2005-01-04 devnull 
393 24c02865 2005-01-04 devnull 	if(chatty) {
394 24c02865 2005-01-04 devnull 		fprint(2, "writepage(%d)... from #%ld to #%ld...\n",
395 24c02865 2005-01-04 devnull 			page, begin, end);
396 24c02865 2005-01-04 devnull 	}
397 24c02865 2005-01-04 devnull 	Bseek(b, begin, 0);
398 24c02865 2005-01-04 devnull 
399 24c02865 2005-01-04 devnull 	t = end-begin;
400 24c02865 2005-01-04 devnull 	n = sizeof(buf);
401 24c02865 2005-01-04 devnull 	if(n > t) n = t;
402 24c02865 2005-01-04 devnull 	while(t > 0 && (i=Bread(b, buf, n)) > 0) {
403 24c02865 2005-01-04 devnull 		if(write(fd, buf, i) != i)
404 24c02865 2005-01-04 devnull 			return -1;
405 24c02865 2005-01-04 devnull 		t -= i;
406 24c02865 2005-01-04 devnull 		if(n > t)
407 24c02865 2005-01-04 devnull 			n = t;
408 24c02865 2005-01-04 devnull 	}
409 24c02865 2005-01-04 devnull 	return end-begin;
410 24c02865 2005-01-04 devnull }
411 24c02865 2005-01-04 devnull 
412 24c02865 2005-01-04 devnull static Image*
413 24c02865 2005-01-04 devnull psdrawpage(Document *d, int page)
414 24c02865 2005-01-04 devnull {
415 24c02865 2005-01-04 devnull 	PSInfo *ps = d->extra;
416 24c02865 2005-01-04 devnull 	Image *im;
417 24c02865 2005-01-04 devnull 
418 24c02865 2005-01-04 devnull 	if(ps->clueless)
419 24c02865 2005-01-04 devnull 		return readimage(display, ps->gs.gsdfd, 0);
420 24c02865 2005-01-04 devnull 
421 24c02865 2005-01-04 devnull 	waitgs(&ps->gs);
422 24c02865 2005-01-04 devnull 
423 24c02865 2005-01-04 devnull 	if(goodps)
424 24c02865 2005-01-04 devnull 		pswritepage(d, ps->gs.gsfd, page);
425 24c02865 2005-01-04 devnull 	else {
426 24c02865 2005-01-04 devnull 		pswritepage(d, ps->gs.gsfd, -1);
427 24c02865 2005-01-04 devnull 		pswritepage(d, ps->gs.gsfd, page);
428 24c02865 2005-01-04 devnull 		pswritepage(d, ps->gs.gsfd, d->npage);
429 24c02865 2005-01-04 devnull 	}
430 24c02865 2005-01-04 devnull 	/*
431 24c02865 2005-01-04 devnull 	 * If last line terminator is \r, gs will read ahead to check for \n
432 24c02865 2005-01-04 devnull 	 * so send one to avoid deadlock.
433 24c02865 2005-01-04 devnull 	 */
434 24c02865 2005-01-04 devnull 	write(ps->gs.gsfd, "\n", 1);
435 24c02865 2005-01-04 devnull 	im = readimage(display, ps->gs.gsdfd, 0);
436 24c02865 2005-01-04 devnull 	if(im == nil) {
437 24c02865 2005-01-04 devnull 		fprint(2, "fatal: readimage error %r\n");
438 24c02865 2005-01-04 devnull 		wexits("readimage");
439 24c02865 2005-01-04 devnull 	}
440 24c02865 2005-01-04 devnull 	waitgs(&ps->gs);
441 24c02865 2005-01-04 devnull 
442 24c02865 2005-01-04 devnull 	return im;
443 24c02865 2005-01-04 devnull }
444 24c02865 2005-01-04 devnull 
445 24c02865 2005-01-04 devnull static char*
446 24c02865 2005-01-04 devnull pspagename(Document *d, int page)
447 24c02865 2005-01-04 devnull {
448 24c02865 2005-01-04 devnull 	PSInfo *ps = (PSInfo *) d->extra;
449 24c02865 2005-01-04 devnull 	return ps->page[page].name;
450 24c02865 2005-01-04 devnull }