/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ /* * PostScript picture inclusion routines. Support for managing in-line pictures * has been added, and works in combination with the simple picpack pre-processor * that's supplied with this package. An in-line picture begins with a special * device control command that looks like, * *		x X InlinPicture name size * * where name is the pathname of the original picture file and size is the number * of bytes in the picture, which begins immediately on the next line. When dpost * encounters the InlinePicture device control command inlinepic() is called and * that routine appends the string name and the integer size to a temporary file * (fp_pic) and then adds the next size bytes read from the current input file to * file fp_pic. All in-line pictures are saved in fp_pic and located later using * the name string and picture file size that separate pictures saved in fp_pic. * * When a picture request (ie. an "x X PI" command) is encountered picopen() is * called and it first looks for the picture file in fp_pic. If it's found there * the entire picture (ie. size bytes) is copied from fp_pic to a new temp file * and that temp file is used as the picture file. If there's nothing in fp_pic * or if the lookup failed the original route is taken. * * Support for in-line pictures is an attempt to address requirements, expressed * by several organizations, of being able to store a document as a single file * (usually troff input) that can then be sent through dpost and ultimately to * a PostScript printer. The mechanism may help some users, but the are obvious * disadvantages to this approach, and the original mechanism is the recommended * approach! Perhaps the most important problem is that troff output, with in-line * pictures included, doesn't fit the device independent language accepted by * important post-processors (like proff) and that means you won't be able to * reliably preview a packed file on your 5620 (or whatever). */ #include <u.h>#include <libc.h>#include <bio.h>#include <stdio.h>#include "ext.h"#include "common.h"#include "tr2post.h"#include "comments.h"		/* PostScript file structuring comments *//* #include "gen.h" */		/* general purpose definitions */#include "path.h"		/* just for TEMPDIR definition *//* #include "ext.h" */		/* external variable declarations */ Biobuf	*bfp_pic = NULL;Biobufhdr	*Bfp_pic;Biobufhdr	*picopen(char *); #define MAXGETFIELDS	16char *fields[MAXGETFIELDS];int nfields; extern int	devres, hpos, vpos;extern int	picflag; voidpicture(Biobufhdr *inp, char *buf) {	int	i;	int	indent;	int	length;		/* line length */	int	outline = 0;	/* draw a box around the picture? */	int	page = 1;	/* page number pulled from name[] */	int	poffset;	/* page offset */	int	scaleboth = 0;	/* scale both dimensions? */	int	totrap;		/* distance to next trap */	int	whiteout = 0;	/* white out the box? */	char	flags[20];	/* miscellaneous stuff */	char	hwo[40], *p;	/* height, width and offset strings */	char	name[100];	/* picture file and page string */	char	units;		/* scale indicator for frame dimensions */	double	adjx = 0.5;	/* left-right adjustment */	double	adjy = 0.5;	/* top-bottom adjustment */	double	frame[4];	/* height, width, y, and x offsets from hwo[] */	double	rot = 0;	/* rotation in clockwise degrees */	Biobufhdr *fp_in;	/* for *name */ /* * Called from devcntrl() after an 'x X PI' command is found. The syntax of that * command is: * *	x X PI:args * * with args separated by colons and given by: * *	poffset *	indent *	length *	totrap *	file[(page)] *	height[,width[,yoffset[,xoffset]]] *	[flags] * * poffset, indent, length, and totrap are given in machine units. height, width, * and offset refer to the picture frame in inches, unless they're followed by * the u scale indicator. flags is a string that provides a little bit of control * over the placement of the picture in the frame. Rotation of the picture, in * clockwise degrees, is set by the a flag. If it's not followed by an angle * the current rotation angle is incremented by 90 degrees, otherwise the angle * is set by the number that immediately follows the a. */	USED(inp);	if (!picflag)		/* skip it */		return;	endstring(); 	flags[0] = '\0';			/* just to be safe */ 	nfields = getfields(buf, fields, MAXGETFIELDS, 0, ":\n");	if (nfields < 6) {		error(WARNING, "too few arguments to specify picture");		return;	}	poffset = atoi(fields[1]);	indent = atoi(fields[2]);	length = atoi(fields[3]);	totrap = atoi(fields[4]);	strncpy(name, fields[5], sizeof(name));	strncpy(hwo, fields[6], sizeof(hwo));	if (nfields >= 6)		strncpy(flags, fields[7], sizeof(flags)); 	nfields = getfields(buf, fields, MAXGETFIELDS, 0, "()");	if (nfields == 2) {		strncpy(name, fields[0], sizeof(name));		page = atoi(fields[1]);	} 	if ((fp_in = picopen(name)) == NULL) {		error(WARNING, "can't open picture file %s\n", name);		return;	} 	frame[0] = frame[1] = -1;		/* default frame height, width */	frame[2] = frame[3] = 0;		/* and y and x offsets */ 	for (i = 0, p = hwo-1; i < 4 && p != NULL; i++, p = strchr(p, ','))		if (sscanf(++p, "%lf%c", &frame[i], &units) == 2)	    		if (units == 'i' || units == ',' || units == '\0')				frame[i] *= devres; 	if (frame[0] <= 0)		/* check what we got for height */		frame[0] = totrap;     	if (frame[1] <= 0)		/* and width - check too big?? */		frame[1] = length - indent; 	frame[3] += poffset + indent;	/* real x offset */ 	for (i = 0; flags[i]; i++)		switch (flags[i]) {		case 'c': adjx = adjy = 0.5; break;	/* move to the center */		case 'l': adjx = 0; break;		/* left */		case 'r': adjx = 1; break;		/* right */		case 't': adjy = 1; break;		/* top */		case 'b': adjy = 0; break;		/* or bottom justify */		case 'o': outline = 1; break;	/* outline the picture */		case 'w': whiteout = 1; break;	/* white out the box */		case 's': scaleboth = 1; break;	/* scale both dimensions */		case 'a': if ( sscanf(&flags[i+1], "%lf", &rot) != 1 )			  rot += 90;	} 	/* restore(); */	endstring();	Bprint(Bstdout, "cleartomark\n");	Bprint(Bstdout, "saveobj restore\n"); 	ps_include(fp_in, Bstdout, page, whiteout, outline, scaleboth,		frame[3]+frame[1]/2, -vpos-frame[2]-frame[0]/2, frame[1], frame[0], adjx, adjy, -rot);	/* save(); */	Bprint(Bstdout, "/saveobj save def\n");	Bprint(Bstdout, "mark\n");	Bterm(fp_in);} /* * Responsible for finding and opening the next picture file. If we've accumulated * any in-line pictures fp_pic won't be NULL and we'll look there first. If *path * is found in *fp_pic we create another temp file, open it for update, unlink it, * copy in the picture, seek back to the start of the new temp file, and return * the file pointer to the caller. If fp_pic is NULL or the lookup fails we just * open file *path and return the resulting file pointer to the caller. */Biobufhdr *picopen(char *path) {/*	char	name[100];	/* pathnames *//*	long	pos;			/* current position *//*	long	total;			/* and sizes - from *fp_pic */	Biobuf *bfp; 	if ((bfp = Bopen(path, OREAD)) == 0)		error(FATAL, "can't open %s\n", path);	return bfp; #ifdef UNDEF	if (Bfp_pic != NULL) {		Bseek(Bfp_pic, 0L, 0);		while (Bgetfield(Bfp_pic, 's', name, 99)>0			&& Bgetfield(Bfp_pic, 'd', &total, 0)>0) {			pos = Bseek(Bfp_pic, 0L, 1);			if (strcmp(path, name) == 0) {				if (tmpnam(pictmpname) == NULL)					error(FATAL, "can't generate temp file name");				if ( (bfp = Bopen(pictmpname, ORDWR)) == NULL )					error(FATAL, "can't open %s", pictmpname);				Bfp = &(bfp->Biobufhdr);				piccopy(Bfp_pic, Bfp, total);				Bseek(Bfp, 0L, 0);				return(Bfp);	    		}			Bseek(Bfp_pic, total+pos, 0);		}	}	return Bopen(path, OREAD);#endif} /* * Adds an in-line picture file to the end of temporary file *Bfp_pic. All pictures * grabbed from the input file are saved in the same temp file. Each is preceeded * by a one line header that includes the original picture file pathname and the * size of the picture in bytes. The in-line picture file is opened for update, * left open, and unlinked so it disappears when we do. *//*	*fp;			/* current input file *//*	*buf;			/* whatever followed "x X InlinePicture" */ #ifdef UNDEFvoidinlinepic(Biobufhdr *Bfp, char *buf) {	char	name[100];		/* picture file pathname */	long	total;			/* and size - both from *buf */ 	if (Bfp_pic == NULL ) {		tmpnam(pictmpname);		if ((bfp_pic = Bopen(pictmpname, ORDWR)) == 0)	    		error(FATAL, "can't open in-line picture file %s", ipictmpname);		unlink(pictmpname);	}	if ( sscanf(buf, "%s %ld", name, &total) != 2 )		error(FATAL, "in-line picture error");	fseek(Bfp_pic, 0L, 2);	fprintf(Bfp_pic, "%s %ld\n", name, total);	getc(fp);	fflush(fp_pic);	piccopy(fp, fp_pic, total);	ungetc('\n', fp);}#endif /* * Copies total bytes from file fp_in to fp_out. Used to append picture files to * *fp_pic and then copy them to yet another temporary file immediately before * they're used (in picture()). *//*	*fp_in;	input *//*	*fp_out;	and output file pointers *//*	total;		number of bytes to be copied */voidpiccopy(Biobufhdr *Bfp_in, Biobufhdr *Bfp_out, long total) {	long i; 	for (i = 0; i < total; i++)		if (Bputc(Bfp_out, Bgetc(Bfp_in)) < 0)			error(FATAL, "error copying in-line picture file");	Bflush(Bfp_out);}