/* $Id: term_ps.c,v 1.26 2010/07/02 10:53:28 kristaps Exp $ */ /* * Copyright (c) 2008, 2009 Kristaps Dzonsons * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include #include #include #include #include #include "out.h" #include "main.h" #include "term.h" /* Convert PostScript point "x" to an AFM unit. */ #define PNT2AFM(p, x) /* LINTED */ \ (size_t)((double)(x) * (1000.0 / (double)(p)->engine.ps.scale)) /* Convert an AFM unit "x" to a PostScript points */ #define AFM2PNT(p, x) /* LINTED */ \ (size_t)((double)(x) / (1000.0 / (double)(p)->engine.ps.scale)) struct glyph { size_t wx; /* WX in AFM */ }; struct font { const char *name; /* FontName in AFM */ #define MAXCHAR 95 /* total characters we can handle */ struct glyph gly[MAXCHAR]; /* glyph metrics */ }; /* * We define, for the time being, three fonts: bold, oblique/italic, and * normal (roman). The following table hard-codes the font metrics for * ASCII, i.e., 32--127. */ static const struct font fonts[TERMFONT__MAX] = { { "Times-Roman", { { 250 }, { 333 }, { 408 }, { 500 }, { 500 }, { 833 }, { 778 }, { 333 }, { 333 }, { 333 }, { 500 }, { 564 }, { 250 }, { 333 }, { 250 }, { 278 }, { 500 }, { 500 }, { 500 }, { 500 }, { 500 }, { 500 }, { 500 }, { 500 }, { 500 }, { 500 }, { 278 }, { 278 }, { 564 }, { 564 }, { 564 }, { 444 }, { 921 }, { 722 }, { 667 }, { 667 }, { 722 }, { 611 }, { 556 }, { 722 }, { 722 }, { 333 }, { 389 }, { 722 }, { 611 }, { 889 }, { 722 }, { 722 }, { 556 }, { 722 }, { 667 }, { 556 }, { 611 }, { 722 }, { 722 }, { 944 }, { 722 }, { 722 }, { 611 }, { 333 }, { 278 }, { 333 }, { 469 }, { 500 }, { 333 }, { 444 }, { 500 }, { 444 }, { 500}, { 444}, { 333}, { 500}, { 500}, { 278}, { 278}, { 500}, { 278}, { 778}, { 500}, { 500}, { 500}, { 500}, { 333}, { 389}, { 278}, { 500}, { 500}, { 722}, { 500}, { 500}, { 444}, { 480}, { 200}, { 480}, { 541}, } }, { "Times-Bold", { { 250 }, { 333 }, { 555 }, { 500 }, { 500 }, { 1000 }, { 833 }, { 333 }, { 333 }, { 333 }, { 500 }, { 570 }, { 250 }, { 333 }, { 250 }, { 278 }, { 500 }, { 500 }, { 500 }, { 500 }, { 500 }, { 500 }, { 500 }, { 500 }, { 500 }, { 500 }, { 333 }, { 333 }, { 570 }, { 570 }, { 570 }, { 500 }, { 930 }, { 722 }, { 667 }, { 722 }, { 722 }, { 667 }, { 611 }, { 778 }, { 778 }, { 389 }, { 500 }, { 778 }, { 667 }, { 944 }, { 722 }, { 778 }, { 611 }, { 778 }, { 722 }, { 556 }, { 667 }, { 722 }, { 722 }, { 1000 }, { 722 }, { 722 }, { 667 }, { 333 }, { 278 }, { 333 }, { 581 }, { 500 }, { 333 }, { 500 }, { 556 }, { 444 }, { 556 }, { 444 }, { 333 }, { 500 }, { 556 }, { 278 }, { 333 }, { 556 }, { 278 }, { 833 }, { 556 }, { 500 }, { 556 }, { 556 }, { 444 }, { 389 }, { 333 }, { 556 }, { 500 }, { 722 }, { 500 }, { 500 }, { 444 }, { 394 }, { 220 }, { 394 }, { 520 }, } }, { "Times-Italic", { { 250 }, { 333 }, { 420 }, { 500 }, { 500 }, { 833 }, { 778 }, { 333 }, { 333 }, { 333 }, { 500 }, { 675 }, { 250 }, { 333 }, { 250 }, { 278 }, { 500 }, { 500 }, { 500 }, { 500 }, { 500 }, { 500 }, { 500 }, { 500 }, { 500 }, { 500 }, { 333 }, { 333 }, { 675 }, { 675 }, { 675 }, { 500 }, { 920 }, { 611 }, { 611 }, { 667 }, { 722 }, { 611 }, { 611 }, { 722 }, { 722 }, { 333 }, { 444 }, { 667 }, { 556 }, { 833 }, { 667 }, { 722 }, { 611 }, { 722 }, { 611 }, { 500 }, { 556 }, { 722 }, { 611 }, { 833 }, { 611 }, { 556 }, { 556 }, { 389 }, { 278 }, { 389 }, { 422 }, { 500 }, { 333 }, { 500 }, { 500 }, { 444 }, { 500 }, { 444 }, { 278 }, { 500 }, { 500 }, { 278 }, { 278 }, { 444 }, { 278 }, { 722 }, { 500 }, { 500 }, { 500 }, { 500 }, { 389 }, { 389 }, { 278 }, { 500 }, { 444 }, { 667 }, { 444 }, { 444 }, { 389 }, { 400 }, { 275 }, { 400 }, { 541 }, } }, }; /* These work the buffer used by the header and footer. */ #define PS_BUFSLOP 128 #define PS_GROWBUF(p, sz) \ do if ((p)->engine.ps.psmargcur + (sz) > \ (p)->engine.ps.psmargsz) { \ (p)->engine.ps.psmargsz += /* CONSTCOND */ \ MAX(PS_BUFSLOP, (sz)); \ (p)->engine.ps.psmarg = realloc \ ((p)->engine.ps.psmarg, \ (p)->engine.ps.psmargsz); \ if (NULL == (p)->engine.ps.psmarg) { \ perror(NULL); \ exit(EXIT_FAILURE); \ } \ } while (/* CONSTCOND */ 0) static double ps_hspan(const struct termp *, const struct roffsu *); static size_t ps_width(const struct termp *, char); static void ps_advance(struct termp *, size_t); static void ps_begin(struct termp *); static void ps_end(struct termp *); static void ps_endline(struct termp *); static void ps_fclose(struct termp *); static void ps_letter(struct termp *, char); static void ps_pclose(struct termp *); static void ps_pletter(struct termp *, int); static void ps_printf(struct termp *, const char *, ...); static void ps_putchar(struct termp *, char); static void ps_setfont(struct termp *, enum termfont); void * ps_alloc(char *outopts) { struct termp *p; size_t pagex, pagey, margin, lineheight; const char *toks[2]; const char *pp; char *v; if (NULL == (p = term_alloc(TERMENC_ASCII))) return(NULL); p->advance = ps_advance; p->begin = ps_begin; p->end = ps_end; p->endline = ps_endline; p->hspan = ps_hspan; p->letter = ps_letter; p->type = TERMTYPE_PS; p->width = ps_width; p->engine.ps.scale = 11; toks[0] = "paper"; toks[1] = NULL; pp = NULL; while (outopts && *outopts) switch (getsubopt(&outopts, UNCONST(toks), &v)) { case (0): pp = v; break; default: break; } margin = PNT2AFM(p, 72); lineheight = PNT2AFM(p, 12); /* Default to US letter (millimetres). */ pagex = 216; pagey = 279; /* * The ISO-269 paper sizes can be calculated automatically, but * it would require bringing in -lm for pow() and I'd rather not * do that. So just do it the easy way for now. Since this * only happens once, I'm not terribly concerned. */ if (pp && strcasecmp(pp, "letter")) { if (0 == strcasecmp(pp, "a3")) { pagex = 297; pagey = 420; } else if (0 == strcasecmp(pp, "a4")) { pagex = 210; pagey = 297; } else if (0 == strcasecmp(pp, "a5")) { pagex = 148; pagey = 210; } else if (0 == strcasecmp(pp, "legal")) { pagex = 216; pagey = 356; } else if (2 != sscanf(pp, "%zux%zu", &pagex, &pagey)) fprintf(stderr, "%s: Unknown paper\n", pp); } /* Remember millimetres -> AFM units. */ pagex = PNT2AFM(p, ((double)pagex * 2.834)); pagey = PNT2AFM(p, ((double)pagey * 2.834)); assert(margin * 2 < pagex); assert(margin * 2 < pagey); p->engine.ps.width = pagex; p->engine.ps.height = pagey; p->engine.ps.header = pagey - (margin / 2); p->engine.ps.top = pagey - margin; p->engine.ps.footer = (margin / 2); p->engine.ps.bottom = margin; p->engine.ps.left = margin; p->engine.ps.lineheight = lineheight; p->defrmargin = pagex - (margin * 2); return(p); } void ps_free(void *arg) { struct termp *p; p = (struct termp *)arg; if (p->engine.ps.psmarg) free(p->engine.ps.psmarg); term_free(p); } static void ps_printf(struct termp *p, const char *fmt, ...) { va_list ap; int pos; va_start(ap, fmt); /* * If we're running in regular mode, then pipe directly into * vprintf(). If we're processing margins, then push the data * into our growable margin buffer. */ if ( ! (PS_MARGINS & p->engine.ps.psstate)) { vprintf(fmt, ap); va_end(ap); return; } /* * XXX: I assume that the in-margin print won't exceed * PS_BUFSLOP (128 bytes), which is reasonable but still an * assumption that will cause pukeage if it's not the case. */ PS_GROWBUF(p, PS_BUFSLOP); pos = (int)p->engine.ps.psmargcur; vsnprintf(&p->engine.ps.psmarg[pos], PS_BUFSLOP, fmt, ap); p->engine.ps.psmargcur = strlen(p->engine.ps.psmarg); va_end(ap); } static void ps_putchar(struct termp *p, char c) { int pos; /* See ps_printf(). */ if ( ! (PS_MARGINS & p->engine.ps.psstate)) { putchar(c); return; } PS_GROWBUF(p, 2); pos = (int)p->engine.ps.psmargcur++; p->engine.ps.psmarg[pos++] = c; p->engine.ps.psmarg[pos] = '\0'; } /* ARGSUSED */ static void ps_end(struct termp *p) { /* * At the end of the file, do one last showpage. This is the * same behaviour as groff(1) and works for multiple pages as * well as just one. */ assert(0 == p->engine.ps.psstate); assert('\0' == p->engine.ps.last); assert(p->engine.ps.psmarg && p->engine.ps.psmarg[0]); printf("%s", p->engine.ps.psmarg); p->engine.ps.pages++; printf("showpage\n"); printf("%%%%Trailer\n"); printf("%%%%Pages: %zu\n", p->engine.ps.pages); printf("%%%%EOF\n"); } static void ps_begin(struct termp *p) { time_t t; int i; /* * Print margins into margin buffer. Nothing gets output to the * screen yet, so we don't need to initialise the primary state. */ if (p->engine.ps.psmarg) { assert(p->engine.ps.psmargsz); p->engine.ps.psmarg[0] = '\0'; } p->engine.ps.psmargcur = 0; p->engine.ps.psstate = PS_MARGINS; p->engine.ps.pscol = p->engine.ps.left; p->engine.ps.psrow = p->engine.ps.header; ps_setfont(p, TERMFONT_NONE); (*p->headf)(p, p->argf); (*p->endline)(p); p->engine.ps.pscol = p->engine.ps.left; p->engine.ps.psrow = p->engine.ps.footer; (*p->footf)(p, p->argf); (*p->endline)(p); p->engine.ps.psstate &= ~PS_MARGINS; assert(0 == p->engine.ps.psstate); assert(p->engine.ps.psmarg); assert('\0' != p->engine.ps.psmarg[0]); /* * Print header and initialise page state. Following this, * stuff gets printed to the screen, so make sure we're sane. */ t = time(NULL); printf("%%!PS-Adobe-3.0\n"); printf("%%%%Creator: mandoc-%s\n", VERSION); printf("%%%%CreationDate: %s", ctime(&t)); printf("%%%%DocumentData: Clean7Bit\n"); printf("%%%%Orientation: Portrait\n"); printf("%%%%Pages: (atend)\n"); printf("%%%%PageOrder: Ascend\n"); printf("%%%%DocumentMedia: Default %zu %zu 0 () ()\n", AFM2PNT(p, p->engine.ps.width), AFM2PNT(p, p->engine.ps.height)); printf("%%%%DocumentNeededResources: font"); for (i = 0; i < (int)TERMFONT__MAX; i++) printf(" %s", fonts[i].name); printf("\n%%%%EndComments\n"); printf("%%%%Page: %zu %zu\n", p->engine.ps.pages + 1, p->engine.ps.pages + 1); ps_setfont(p, TERMFONT_NONE); p->engine.ps.pscol = p->engine.ps.left; p->engine.ps.psrow = p->engine.ps.top; } static void ps_pletter(struct termp *p, int c) { int f; /* * If we're not in a PostScript "word" context, then open one * now at the current cursor. */ if ( ! (PS_INLINE & p->engine.ps.psstate)) { ps_printf(p, "%zu %zu moveto\n(", AFM2PNT(p, p->engine.ps.pscol), AFM2PNT(p, p->engine.ps.psrow)); p->engine.ps.psstate |= PS_INLINE; } /* * We need to escape these characters as per the PostScript * specification. We would also escape non-graphable characters * (like tabs), but none of them would get to this point and * it's superfluous to abort() on them. */ switch (c) { case ('('): /* FALLTHROUGH */ case (')'): /* FALLTHROUGH */ case ('\\'): ps_putchar(p, '\\'); break; default: break; } /* Write the character and adjust where we are on the page. */ f = (int)p->engine.ps.lastf; if (c <= 32 || (c - 32 > MAXCHAR)) { ps_putchar(p, ' '); p->engine.ps.pscol += fonts[f].gly[0].wx; return; } ps_putchar(p, (char)c); c -= 32; p->engine.ps.pscol += fonts[f].gly[c].wx; } static void ps_pclose(struct termp *p) { /* * Spit out that we're exiting a word context (this is a * "partial close" because we don't check the last-char buffer * or anything). */ if ( ! (PS_INLINE & p->engine.ps.psstate)) return; ps_printf(p, ") show\n"); p->engine.ps.psstate &= ~PS_INLINE; } static void ps_fclose(struct termp *p) { /* * Strong closure: if we have a last-char, spit it out after * checking that we're in the right font mode. This will of * course open a new scope, if applicable. * * Following this, close out any scope that's open. */ if ('\0' != p->engine.ps.last) { if (p->engine.ps.lastf != TERMFONT_NONE) { ps_pclose(p); ps_setfont(p, TERMFONT_NONE); } ps_pletter(p, p->engine.ps.last); p->engine.ps.last = '\0'; } if ( ! (PS_INLINE & p->engine.ps.psstate)) return; ps_pclose(p); } static void ps_letter(struct termp *p, char c) { char cc; /* * State machine dictates whether to buffer the last character * or not. Basically, encoded words are detected by checking if * we're an "8" and switching on the buffer. Then we put "8" in * our buffer, and on the next charater, flush both character * and buffer. Thus, "regular" words are detected by having a * regular character and a regular buffer character. */ if ('\0' == p->engine.ps.last) { assert(8 != c); p->engine.ps.last = c; return; } else if (8 == p->engine.ps.last) { assert(8 != c); p->engine.ps.last = '\0'; } else if (8 == c) { assert(8 != p->engine.ps.last); if ('_' == p->engine.ps.last) { if (p->engine.ps.lastf != TERMFONT_UNDER) { ps_pclose(p); ps_setfont(p, TERMFONT_UNDER); } } else if (p->engine.ps.lastf != TERMFONT_BOLD) { ps_pclose(p); ps_setfont(p, TERMFONT_BOLD); } p->engine.ps.last = c; return; } else { if (p->engine.ps.lastf != TERMFONT_NONE) { ps_pclose(p); ps_setfont(p, TERMFONT_NONE); } cc = p->engine.ps.last; p->engine.ps.last = c; c = cc; } ps_pletter(p, c); } static void ps_advance(struct termp *p, size_t len) { /* * Advance some spaces. This can probably be made smarter, * i.e., to have multiple space-separated words in the same * scope, but this is easier: just close out the current scope * and readjust our column settings. */ ps_fclose(p); p->engine.ps.pscol += len; } static void ps_endline(struct termp *p) { /* Close out any scopes we have open: we're at eoln. */ ps_fclose(p); /* * If we're in the margin, don't try to recalculate our current * row. XXX: if the column tries to be fancy with multiple * lines, we'll do nasty stuff. */ if (PS_MARGINS & p->engine.ps.psstate) return; /* * Put us down a line. If we're at the page bottom, spit out a * showpage and restart our row. */ p->engine.ps.pscol = p->engine.ps.left; if (p->engine.ps.psrow >= p->engine.ps.lineheight + p->engine.ps.bottom) { p->engine.ps.psrow -= p->engine.ps.lineheight; return; } assert(p->engine.ps.psmarg && p->engine.ps.psmarg[0]); printf("%s", p->engine.ps.psmarg); printf("showpage\n"); p->engine.ps.pages++; printf("%%%%Page: %zu %zu\n", p->engine.ps.pages + 1, p->engine.ps.pages + 1); p->engine.ps.psrow = p->engine.ps.top; } static void ps_setfont(struct termp *p, enum termfont f) { assert(f < TERMFONT__MAX); ps_printf(p, "/%s %zu selectfont\n", fonts[(int)f].name, p->engine.ps.scale); p->engine.ps.lastf = f; } /* ARGSUSED */ static size_t ps_width(const struct termp *p, char c) { if (c <= 32 || c - 32 >= MAXCHAR) return(fonts[(int)TERMFONT_NONE].gly[0].wx); c -= 32; return(fonts[(int)TERMFONT_NONE].gly[(int)c].wx); } static double ps_hspan(const struct termp *p, const struct roffsu *su) { double r; /* * All of these measurements are derived by converting from the * native measurement to AFM units. */ switch (su->unit) { case (SCALE_CM): r = PNT2AFM(p, su->scale * 28.34); break; case (SCALE_IN): r = PNT2AFM(p, su->scale * 72); break; case (SCALE_PC): r = PNT2AFM(p, su->scale * 12); break; case (SCALE_PT): r = PNT2AFM(p, su->scale * 100); break; case (SCALE_EM): r = su->scale * fonts[(int)TERMFONT_NONE].gly[109 - 32].wx; break; case (SCALE_MM): r = PNT2AFM(p, su->scale * 2.834); break; case (SCALE_EN): r = su->scale * fonts[(int)TERMFONT_NONE].gly[110 - 32].wx; break; case (SCALE_VS): r = su->scale * p->engine.ps.lineheight; break; default: r = su->scale; break; } return(r); }