/* $OpenBSD: term_ps.c,v 1.46 2016/08/10 11:02:30 schwarze Exp $ */ /* * Copyright (c) 2010, 2011 Kristaps Dzonsons * Copyright (c) 2014, 2015, 2016 Ingo Schwarze * * 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 AUTHORS DISCLAIM ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS 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. */ #include #include #include #include #include #include #include #include #include #include "mandoc_aux.h" #include "out.h" #include "term.h" #include "manconf.h" #include "main.h" /* These work the buffer used by the header and footer. */ #define PS_BUFSLOP 128 /* Convert PostScript point "x" to an AFM unit. */ #define PNT2AFM(p, x) \ (size_t)((double)(x) * (1000.0 / (double)(p)->ps->scale)) /* Convert an AFM unit "x" to a PostScript points */ #define AFM2PNT(p, x) \ ((double)(x) / (1000.0 / (double)(p)->ps->scale)) struct glyph { unsigned short 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 */ }; struct termp_ps { int flags; #define PS_INLINE (1 << 0) /* we're in a word */ #define PS_MARGINS (1 << 1) /* we're in the margins */ #define PS_NEWPAGE (1 << 2) /* new page, no words yet */ #define PS_BACKSP (1 << 3) /* last character was backspace */ size_t pscol; /* visible column (AFM units) */ size_t pscolnext; /* used for overstrike */ size_t psrow; /* visible row (AFM units) */ char *psmarg; /* margin buf */ size_t psmargsz; /* margin buf size */ size_t psmargcur; /* cur index in margin buf */ char last; /* last non-backspace seen */ enum termfont lastf; /* last set font */ enum termfont nextf; /* building next font here */ size_t scale; /* font scaling factor */ size_t pages; /* number of pages shown */ size_t lineheight; /* line height (AFM units) */ size_t top; /* body top (AFM units) */ size_t bottom; /* body bottom (AFM units) */ size_t height; /* page height (AFM units */ size_t width; /* page width (AFM units) */ size_t lastwidth; /* page width before last ll */ size_t left; /* body left (AFM units) */ size_t header; /* header pos (AFM units) */ size_t footer; /* footer pos (AFM units) */ size_t pdfbytes; /* current output byte */ size_t pdflastpg; /* byte of last page mark */ size_t pdfbody; /* start of body object */ size_t *pdfobjs; /* table of object offsets */ size_t pdfobjsz; /* size of pdfobjs */ }; static int ps_hspan(const struct termp *, const struct roffsu *); static size_t ps_width(const struct termp *, int); static void ps_advance(struct termp *, size_t); static void ps_begin(struct termp *); static void ps_closepage(struct termp *); static void ps_end(struct termp *); static void ps_endline(struct termp *); static void ps_growbuf(struct termp *, size_t); static void ps_letter(struct termp *, int); static void ps_pclose(struct termp *); static void ps_plast(struct termp *); static void ps_pletter(struct termp *, int); static void ps_printf(struct termp *, const char *, ...) __attribute__((__format__ (printf, 2, 3))); static void ps_putchar(struct termp *, char); static void ps_setfont(struct termp *, enum termfont); static void ps_setwidth(struct termp *, int, int); static struct termp *pspdf_alloc(const struct manoutput *); static void pdf_obj(struct termp *, size_t); /* * 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 }, } }, { "Times-BoldItalic", { { 250 }, { 389 }, { 555 }, { 500 }, { 500 }, { 833 }, { 778 }, { 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 }, { 832 }, { 667 }, { 667 }, { 667 }, { 722 }, { 667 }, { 667 }, { 722 }, { 778 }, { 389 }, { 500 }, { 667 }, { 611 }, { 889 }, { 722 }, { 722 }, { 611 }, { 722 }, { 667 }, { 556 }, { 611 }, { 722 }, { 667 }, { 889 }, { 667 }, { 611 }, { 611 }, { 333 }, { 278 }, { 333 }, { 570 }, { 500 }, { 333 }, { 500 }, { 500 }, { 444 }, { 500 }, { 444 }, { 333 }, { 500 }, { 556 }, { 278 }, { 278 }, { 500 }, { 278 }, { 778 }, { 556 }, { 500 }, { 500 }, { 500 }, { 389 }, { 389 }, { 278 }, { 556 }, { 444 }, { 667 }, { 500 }, { 444 }, { 389 }, { 348 }, { 220 }, { 348 }, { 570 }, } }, }; void * pdf_alloc(const struct manoutput *outopts) { struct termp *p; if (NULL != (p = pspdf_alloc(outopts))) p->type = TERMTYPE_PDF; return p; } void * ps_alloc(const struct manoutput *outopts) { struct termp *p; if (NULL != (p = pspdf_alloc(outopts))) p->type = TERMTYPE_PS; return p; } static struct termp * pspdf_alloc(const struct manoutput *outopts) { struct termp *p; unsigned int pagex, pagey; size_t marginx, marginy, lineheight; const char *pp; p = mandoc_calloc(1, sizeof(struct termp)); p->enc = TERMENC_ASCII; p->fontq = mandoc_reallocarray(NULL, (p->fontsz = 8), sizeof(enum termfont)); p->fontq[0] = p->fontl = TERMFONT_NONE; p->ps = mandoc_calloc(1, sizeof(struct termp_ps)); 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->setwidth = ps_setwidth; p->width = ps_width; /* 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. */ pp = outopts->paper; 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, "%ux%u", &pagex, &pagey)) warnx("%s: Unknown paper", pp); } /* * This MUST be defined before any PNT2AFM or AFM2PNT * calculations occur. */ p->ps->scale = 11; /* Remember millimetres -> AFM units. */ pagex = PNT2AFM(p, ((double)pagex * 2.834)); pagey = PNT2AFM(p, ((double)pagey * 2.834)); /* Margins are 1/9 the page x and y. */ marginx = (size_t)((double)pagex / 9.0); marginy = (size_t)((double)pagey / 9.0); /* Line-height is 1.4em. */ lineheight = PNT2AFM(p, ((double)p->ps->scale * 1.4)); p->ps->width = p->ps->lastwidth = (size_t)pagex; p->ps->height = (size_t)pagey; p->ps->header = pagey - (marginy / 2) - (lineheight / 2); p->ps->top = pagey - marginy; p->ps->footer = (marginy / 2) - (lineheight / 2); p->ps->bottom = marginy; p->ps->left = marginx; p->ps->lineheight = lineheight; p->defrmargin = pagex - (marginx * 2); return p; } static void ps_setwidth(struct termp *p, int iop, int width) { size_t lastwidth; lastwidth = p->ps->width; if (iop > 0) p->ps->width += width; else if (iop == 0) p->ps->width = width ? (size_t)width : p->ps->lastwidth; else if (p->ps->width > (size_t)width) p->ps->width -= width; else p->ps->width = 0; p->ps->lastwidth = lastwidth; } void pspdf_free(void *arg) { struct termp *p; p = (struct termp *)arg; free(p->ps->psmarg); free(p->ps->pdfobjs); free(p->ps); term_free(p); } static void ps_printf(struct termp *p, const char *fmt, ...) { va_list ap; int pos, len; 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->ps->flags)) { len = vprintf(fmt, ap); va_end(ap); p->ps->pdfbytes += len < 0 ? 0 : (size_t)len; 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->ps->psmargcur; vsnprintf(&p->ps->psmarg[pos], PS_BUFSLOP, fmt, ap); va_end(ap); p->ps->psmargcur = strlen(p->ps->psmarg); } static void ps_putchar(struct termp *p, char c) { int pos; /* See ps_printf(). */ if ( ! (PS_MARGINS & p->ps->flags)) { putchar(c); p->ps->pdfbytes++; return; } ps_growbuf(p, 2); pos = (int)p->ps->psmargcur++; p->ps->psmarg[pos++] = c; p->ps->psmarg[pos] = '\0'; } static void pdf_obj(struct termp *p, size_t obj) { assert(obj > 0); if ((obj - 1) >= p->ps->pdfobjsz) { p->ps->pdfobjsz = obj + 128; p->ps->pdfobjs = mandoc_reallocarray(p->ps->pdfobjs, p->ps->pdfobjsz, sizeof(size_t)); } p->ps->pdfobjs[(int)obj - 1] = p->ps->pdfbytes; ps_printf(p, "%zu 0 obj\n", obj); } static void ps_closepage(struct termp *p) { int i; size_t len, base; /* * Close out a page that we've already flushed to output. In * PostScript, we simply note that the page must be showed. In * PDF, we must now create the Length, Resource, and Page node * for the page contents. */ assert(p->ps->psmarg && p->ps->psmarg[0]); ps_printf(p, "%s", p->ps->psmarg); if (TERMTYPE_PS != p->type) { ps_printf(p, "ET\n"); len = p->ps->pdfbytes - p->ps->pdflastpg; base = p->ps->pages * 4 + p->ps->pdfbody; ps_printf(p, "endstream\nendobj\n"); /* Length of content. */ pdf_obj(p, base + 1); ps_printf(p, "%zu\nendobj\n", len); /* Resource for content. */ pdf_obj(p, base + 2); ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n"); ps_printf(p, "/Font <<\n"); for (i = 0; i < (int)TERMFONT__MAX; i++) ps_printf(p, "/F%d %d 0 R\n", i, 3 + i); ps_printf(p, ">>\n>>\n"); /* Page node. */ pdf_obj(p, base + 3); ps_printf(p, "<<\n"); ps_printf(p, "/Type /Page\n"); ps_printf(p, "/Parent 2 0 R\n"); ps_printf(p, "/Resources %zu 0 R\n", base + 2); ps_printf(p, "/Contents %zu 0 R\n", base); ps_printf(p, ">>\nendobj\n"); } else ps_printf(p, "showpage\n"); p->ps->pages++; p->ps->psrow = p->ps->top; assert( ! (PS_NEWPAGE & p->ps->flags)); p->ps->flags |= PS_NEWPAGE; } static void ps_end(struct termp *p) { size_t i, xref, base; ps_plast(p); ps_pclose(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. */ if ( ! (PS_NEWPAGE & p->ps->flags)) { assert(0 == p->ps->flags); assert('\0' == p->ps->last); ps_closepage(p); } if (TERMTYPE_PS == p->type) { ps_printf(p, "%%%%Trailer\n"); ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages); ps_printf(p, "%%%%EOF\n"); return; } pdf_obj(p, 2); ps_printf(p, "<<\n/Type /Pages\n"); ps_printf(p, "/MediaBox [0 0 %zu %zu]\n", (size_t)AFM2PNT(p, p->ps->width), (size_t)AFM2PNT(p, p->ps->height)); ps_printf(p, "/Count %zu\n", p->ps->pages); ps_printf(p, "/Kids ["); for (i = 0; i < p->ps->pages; i++) ps_printf(p, " %zu 0 R", i * 4 + p->ps->pdfbody + 3); base = (p->ps->pages - 1) * 4 + p->ps->pdfbody + 4; ps_printf(p, "]\n>>\nendobj\n"); pdf_obj(p, base); ps_printf(p, "<<\n"); ps_printf(p, "/Type /Catalog\n"); ps_printf(p, "/Pages 2 0 R\n"); ps_printf(p, ">>\n"); xref = p->ps->pdfbytes; ps_printf(p, "xref\n"); ps_printf(p, "0 %zu\n", base + 1); ps_printf(p, "0000000000 65535 f \n"); for (i = 0; i < base; i++) ps_printf(p, "%.10zu 00000 n \n", p->ps->pdfobjs[(int)i]); ps_printf(p, "trailer\n"); ps_printf(p, "<<\n"); ps_printf(p, "/Size %zu\n", base + 1); ps_printf(p, "/Root %zu 0 R\n", base); ps_printf(p, "/Info 1 0 R\n"); ps_printf(p, ">>\n"); ps_printf(p, "startxref\n"); ps_printf(p, "%zu\n", xref); ps_printf(p, "%%%%EOF\n"); } static void ps_begin(struct termp *p) { 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->ps->psmarg) { assert(p->ps->psmargsz); p->ps->psmarg[0] = '\0'; } /*p->ps->pdfbytes = 0;*/ p->ps->psmargcur = 0; p->ps->flags = PS_MARGINS; p->ps->pscol = p->ps->left; p->ps->psrow = p->ps->header; ps_setfont(p, TERMFONT_NONE); (*p->headf)(p, p->argf); (*p->endline)(p); p->ps->pscol = p->ps->left; p->ps->psrow = p->ps->footer; (*p->footf)(p, p->argf); (*p->endline)(p); p->ps->flags &= ~PS_MARGINS; assert(0 == p->ps->flags); assert(p->ps->psmarg); assert('\0' != p->ps->psmarg[0]); /* * Print header and initialise page state. Following this, * stuff gets printed to the screen, so make sure we're sane. */ if (TERMTYPE_PS == p->type) { ps_printf(p, "%%!PS-Adobe-3.0\n"); ps_printf(p, "%%%%DocumentData: Clean7Bit\n"); ps_printf(p, "%%%%Orientation: Portrait\n"); ps_printf(p, "%%%%Pages: (atend)\n"); ps_printf(p, "%%%%PageOrder: Ascend\n"); ps_printf(p, "%%%%DocumentMedia: " "Default %zu %zu 0 () ()\n", (size_t)AFM2PNT(p, p->ps->width), (size_t)AFM2PNT(p, p->ps->height)); ps_printf(p, "%%%%DocumentNeededResources: font"); for (i = 0; i < (int)TERMFONT__MAX; i++) ps_printf(p, " %s", fonts[i].name); ps_printf(p, "\n%%%%EndComments\n"); } else { ps_printf(p, "%%PDF-1.1\n"); pdf_obj(p, 1); ps_printf(p, "<<\n"); ps_printf(p, ">>\n"); ps_printf(p, "endobj\n"); for (i = 0; i < (int)TERMFONT__MAX; i++) { pdf_obj(p, (size_t)i + 3); ps_printf(p, "<<\n"); ps_printf(p, "/Type /Font\n"); ps_printf(p, "/Subtype /Type1\n"); ps_printf(p, "/Name /F%d\n", i); ps_printf(p, "/BaseFont /%s\n", fonts[i].name); ps_printf(p, ">>\n"); } } p->ps->pdfbody = (size_t)TERMFONT__MAX + 3; p->ps->pscol = p->ps->left; p->ps->psrow = p->ps->top; p->ps->flags |= PS_NEWPAGE; ps_setfont(p, TERMFONT_NONE); } static void ps_pletter(struct termp *p, int c) { int f; /* * If we haven't opened a page context, then output that we're * in a new page and make sure the font is correctly set. */ if (PS_NEWPAGE & p->ps->flags) { if (TERMTYPE_PS == p->type) { ps_printf(p, "%%%%Page: %zu %zu\n", p->ps->pages + 1, p->ps->pages + 1); ps_printf(p, "/%s %zu selectfont\n", fonts[(int)p->ps->lastf].name, p->ps->scale); } else { pdf_obj(p, p->ps->pdfbody + p->ps->pages * 4); ps_printf(p, "<<\n"); ps_printf(p, "/Length %zu 0 R\n", p->ps->pdfbody + 1 + p->ps->pages * 4); ps_printf(p, ">>\nstream\n"); } p->ps->pdflastpg = p->ps->pdfbytes; p->ps->flags &= ~PS_NEWPAGE; } /* * If we're not in a PostScript "word" context, then open one * now at the current cursor. */ if ( ! (PS_INLINE & p->ps->flags)) { if (TERMTYPE_PS != p->type) { ps_printf(p, "BT\n/F%d %zu Tf\n", (int)p->ps->lastf, p->ps->scale); ps_printf(p, "%.3f %.3f Td\n(", AFM2PNT(p, p->ps->pscol), AFM2PNT(p, p->ps->psrow)); } else ps_printf(p, "%.3f %.3f moveto\n(", AFM2PNT(p, p->ps->pscol), AFM2PNT(p, p->ps->psrow)); p->ps->flags |= PS_INLINE; } assert( ! (PS_NEWPAGE & p->ps->flags)); /* * 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 '(': case ')': case '\\': ps_putchar(p, '\\'); break; default: break; } /* Write the character and adjust where we are on the page. */ f = (int)p->ps->lastf; if (c <= 32 || c - 32 >= MAXCHAR) c = 32; ps_putchar(p, (char)c); c -= 32; p->ps->pscol += (size_t)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->ps->flags)) return; if (TERMTYPE_PS != p->type) { ps_printf(p, ") Tj\nET\n"); } else ps_printf(p, ") show\n"); p->ps->flags &= ~PS_INLINE; } /* If we have a `last' char that wasn't printed yet, print it now. */ static void ps_plast(struct termp *p) { size_t wx; if (p->ps->last == '\0') return; /* Check the font mode; open a new scope if it doesn't match. */ if (p->ps->nextf != p->ps->lastf) { ps_pclose(p); ps_setfont(p, p->ps->nextf); } p->ps->nextf = TERMFONT_NONE; /* * For an overstrike, if a previous character * was wider, advance to center the new one. */ if (p->ps->pscolnext) { wx = fonts[p->ps->lastf].gly[(int)p->ps->last-32].wx; if (p->ps->pscol + wx < p->ps->pscolnext) p->ps->pscol = (p->ps->pscol + p->ps->pscolnext - wx) / 2; } ps_pletter(p, p->ps->last); p->ps->last = '\0'; /* * For an overstrike, if a previous character * was wider, advance to the end of the old one. */ if (p->ps->pscol < p->ps->pscolnext) { ps_pclose(p); p->ps->pscol = p->ps->pscolnext; } } static void ps_letter(struct termp *p, int arg) { size_t savecol; char c; c = arg >= 128 || arg <= 0 ? '?' : arg; /* * When receiving a backspace, merely flag it. * We don't know yet whether it is * a font instruction or an overstrike. */ if (c == '\b') { assert(p->ps->last != '\0'); assert( ! (p->ps->flags & PS_BACKSP)); p->ps->flags |= PS_BACKSP; return; } /* * Decode font instructions. */ if (p->ps->flags & PS_BACKSP) { if (p->ps->last == '_') { switch (p->ps->nextf) { case TERMFONT_BI: break; case TERMFONT_BOLD: p->ps->nextf = TERMFONT_BI; break; default: p->ps->nextf = TERMFONT_UNDER; } p->ps->last = c; p->ps->flags &= ~PS_BACKSP; return; } if (p->ps->last == c) { switch (p->ps->nextf) { case TERMFONT_BI: break; case TERMFONT_UNDER: p->ps->nextf = TERMFONT_BI; break; default: p->ps->nextf = TERMFONT_BOLD; } p->ps->flags &= ~PS_BACKSP; return; } /* * This is not a font instruction, but rather * the next character. Prepare for overstrike. */ savecol = p->ps->pscol; } else savecol = SIZE_MAX; /* * We found the next character, so the font instructions * for the previous one are complete. * Use them and print it. */ ps_plast(p); /* * Do not print the current character yet because font * instructions might follow; only remember the character. * It will get printed later from ps_plast(). */ p->ps->last = c; /* * For an overstrike, back up to the previous position. * If the previous character is wider than any it overstrikes, * remember the current position, because it might also be * wider than all that will overstrike it. */ if (savecol != SIZE_MAX) { if (p->ps->pscolnext < p->ps->pscol) p->ps->pscolnext = p->ps->pscol; ps_pclose(p); p->ps->pscol = savecol; p->ps->flags &= ~PS_BACKSP; } else p->ps->pscolnext = 0; } 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_plast(p); ps_pclose(p); p->ps->pscol += len; } static void ps_endline(struct termp *p) { /* Close out any scopes we have open: we're at eoln. */ ps_plast(p); ps_pclose(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->ps->flags) return; /* Left-justify. */ p->ps->pscol = p->ps->left; /* If we haven't printed anything, return. */ if (PS_NEWPAGE & p->ps->flags) return; /* * Put us down a line. If we're at the page bottom, spit out a * showpage and restart our row. */ if (p->ps->psrow >= p->ps->lineheight + p->ps->bottom) { p->ps->psrow -= p->ps->lineheight; return; } ps_closepage(p); } static void ps_setfont(struct termp *p, enum termfont f) { assert(f < TERMFONT__MAX); p->ps->lastf = f; /* * If we're still at the top of the page, let the font-setting * be delayed until we actually have stuff to print. */ if (PS_NEWPAGE & p->ps->flags) return; if (TERMTYPE_PS == p->type) ps_printf(p, "/%s %zu selectfont\n", fonts[(int)f].name, p->ps->scale); else ps_printf(p, "/F%d %zu Tf\n", (int)f, p->ps->scale); } static size_t ps_width(const struct termp *p, int c) { if (c <= 32 || c - 32 >= MAXCHAR) c = 0; else c -= 32; return (size_t)fonts[(int)TERMFONT_NONE].gly[c].wx; } static int 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_BU: /* * Traditionally, the default unit is fixed to the * output media. So this would refer to the point. In * mandoc(1), however, we stick to the default terminal * scaling unit so that output is the same regardless * the media. */ r = PNT2AFM(p, su->scale * 72.0 / 240.0); break; case SCALE_CM: r = PNT2AFM(p, su->scale * 72.0 / 2.54); break; case SCALE_EM: r = su->scale * fonts[(int)TERMFONT_NONE].gly[109 - 32].wx; break; case SCALE_EN: r = su->scale * fonts[(int)TERMFONT_NONE].gly[110 - 32].wx; break; case SCALE_IN: r = PNT2AFM(p, su->scale * 72.0); break; case SCALE_MM: r = su->scale * fonts[(int)TERMFONT_NONE].gly[109 - 32].wx / 100.0; break; case SCALE_PC: r = PNT2AFM(p, su->scale * 12.0); break; case SCALE_PT: r = PNT2AFM(p, su->scale * 1.0); break; case SCALE_VS: r = su->scale * p->ps->lineheight; break; default: r = su->scale; break; } return r * 24.0; } static void ps_growbuf(struct termp *p, size_t sz) { if (p->ps->psmargcur + sz <= p->ps->psmargsz) return; if (sz < PS_BUFSLOP) sz = PS_BUFSLOP; p->ps->psmargsz += sz; p->ps->psmarg = mandoc_realloc(p->ps->psmarg, p->ps->psmargsz); }