X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/halibut/blobdiff_plain/6e969fcfe897ed651145d5cadfc6764c2a6bce6d..dc69abf1a840990e2e0885777d697e0d98541d86:/bk_ps.c diff --git a/bk_ps.c b/bk_ps.c index 37bc07e..5409290 100644 --- a/bk_ps.c +++ b/bk_ps.c @@ -2,17 +2,251 @@ * PostScript backend for Halibut */ +#include #include "halibut.h" +#include "paper.h" + +static void ps_comment(FILE *fp, char const *leader, word *words); paragraph *ps_config_filename(char *filename) { - return NULL; + return cmdline_cfg_simple("ps-filename", filename, NULL); } void ps_backend(paragraph *sourceform, keywordlist *keywords, - indexdata *idx, void *unused) { + indexdata *idx, void *vdoc) { + document *doc = (document *)vdoc; + int font_index; + font_encoding *fe; + page_data *page; + int pageno; + FILE *fp; + char *filename; + paragraph *p; + + IGNORE(keywords); + IGNORE(idx); + + filename = dupstr("output.ps"); + for (p = sourceform; p; p = p->next) { + if (p->type == para_Config) { + if (!ustricmp(p->keyword, L"ps-filename")) { + sfree(filename); + filename = dupstr(adv(p->origkeyword)); + } + } + } + + fp = fopen(filename, "w"); + if (!fp) { + error(err_cantopenw, filename); + return; + } + + fprintf(fp, "%%!PS-Adobe-3.0\n"); + fprintf(fp, "%%%%Creator: Halibut, %s\n", version); + fprintf(fp, "%%%%DocumentData: Clean8Bit\n"); + fprintf(fp, "%%%%LanguageLevel: 1\n"); + for (pageno = 0, page = doc->pages; page; page = page->next) + pageno++; + fprintf(fp, "%%%%Pages: %d\n", pageno); + for (p = sourceform; p; p = p->next) + if (p->type == para_Title) + ps_comment(fp, "%%Title: ", p->words); + fprintf(fp, "%%%%DocumentNeededResources:\n"); + for (fe = doc->fonts->head; fe; fe = fe->next) + /* XXX This may request the same font multiple times. */ + fprintf(fp, "%%%%+ font %s\n", fe->font->name); + fprintf(fp, "%%%%DocumentSuppliedResources: procset Halibut 0 0\n"); + fprintf(fp, "%%%%EndComments\n"); + + fprintf(fp, "%%%%BeginProlog\n"); + fprintf(fp, "%%%%BeginResource: procset Halibut 0 0\n"); /* - * FIXME + * Supply a prologue function which allows a reasonably + * compressed representation of the text on the pages. + * + * Expects two arguments: a y-coordinate, and then an array. + * Elements of the array are processed sequentially as follows: + * + * - a number is treated as an x-coordinate + * - an array is treated as a (font, size) pair + * - a string is shown */ - printf("[ps] %p = %s\n", unused, unused); + fprintf(fp, + "/tdict 4 dict dup begin\n" + " /arraytype {aload pop scalefont setfont} bind def\n" + " /realtype {1 index moveto} bind def\n" + " /integertype /realtype load def\n" + " /stringtype {show} bind def\n" + "end def\n" + "/t { tdict begin {dup type exec} forall end pop } bind def\n"); + + fprintf(fp, "%%%%EndResource\n"); + fprintf(fp, "%%%%EndProlog\n"); + + fprintf(fp, "%%%%BeginSetup\n"); + + /* + * This is as good a place as any to put version IDs. + */ + for (p = sourceform; p; p = p->next) + if (p->type == para_VersionID) + ps_comment(fp, "% ", p->words); + + for (fe = doc->fonts->head; fe; fe = fe->next) + /* XXX This may request the same font multiple times. */ + fprintf(fp, "%%%%IncludeResource: font %s\n", fe->font->name); + + /* + * Re-encode the fonts. + */ + font_index = 0; + for (fe = doc->fonts->head; fe; fe = fe->next) { + char fname[40]; + int i; + + sprintf(fname, "f%d", font_index++); + fe->name = dupstr(fname); + + fprintf(fp, "/%s findfont dup length dict begin\n", fe->font->name); + fprintf(fp, "{1 index /FID ne {def} {pop pop} ifelse} forall\n"); + fprintf(fp, "/Encoding [\n"); + for (i = 0; i < 256; i++) + fprintf(fp, "/%s%c", fe->vector[i] ? fe->vector[i] : ".notdef", + i % 4 == 3 ? '\n' : ' '); + fprintf(fp, "] def\n"); + fprintf(fp, "currentdict end\n"); + fprintf(fp, "/fontname-%s exch definefont /%s exch def\n\n", + fe->name, fe->name); + } + fprintf(fp, "%%%%EndSetup\n"); + + /* + * Output the text and graphics. + */ + pageno = 0; + for (page = doc->pages; page; page = page->next) { + text_fragment *frag, *frag_end; + rect *r; + + pageno++; + fprintf(fp, "%%%%Page: %d %d\n", pageno, pageno); + fprintf(fp, "save\n"); + +#if 0 + { + xref *xr; + /* + * I used this diagnostic briefly to ensure that + * cross-reference rectangles were being put where they + * should be. + */ + for (xr = page->first_xref; xr; xr = xr->next) { + fprintf(fp, "gsave 0.7 setgray %g %g moveto", + xr->lx/FUNITS_PER_PT, xr->ty/FUNITS_PER_PT); + fprintf(fp, " %g %g lineto %g %g lineto", + xr->lx/FUNITS_PER_PT, xr->by/FUNITS_PER_PT, + xr->rx/FUNITS_PER_PT, xr->by/FUNITS_PER_PT); + fprintf(fp, " %g %g lineto closepath fill grestore\n", + xr->rx/FUNITS_PER_PT, xr->ty/FUNITS_PER_PT); + } + } +#endif + + for (r = page->first_rect; r; r = r->next) { + fprintf(fp, "%g %g moveto %g 0 rlineto 0 %g rlineto " + "-%g 0 rlineto closepath fill\n", + r->x / FUNITS_PER_PT, r->y / FUNITS_PER_PT, + r->w / FUNITS_PER_PT, r->h / FUNITS_PER_PT, + r->w / FUNITS_PER_PT); + } + + frag = page->first_text; + while (frag) { + font_encoding *fe; + int fs; + char *c; + + /* + * Collect all the adjacent text fragments with the + * same y-coordinate. + */ + for (frag_end = frag; + frag_end && frag_end->y == frag->y; + frag_end = frag_end->next); + + fprintf(fp, "%g[", frag->y / FUNITS_PER_PT); + + fe = NULL; + fs = -1; + + while (frag && frag != frag_end) { + + if (frag->fe != fe || frag->fontsize != fs) + fprintf(fp, "[%s %d]", frag->fe->name, frag->fontsize); + fe = frag->fe; + fs = frag->fontsize; + + fprintf(fp, "%g(", frag->x/FUNITS_PER_PT); + for (c = frag->text; *c; c++) { + if (*c == '(' || *c == ')' || *c == '\\') + fputc('\\', fp); + fputc(*c, fp); + } + fprintf(fp, ")"); + + frag = frag->next; + } + + fprintf(fp, "]t\n"); + } + + fprintf(fp, "restore showpage\n"); + } + + fprintf(fp, "%%%%EOF\n"); + + fclose(fp); + + sfree(filename); +} + +static void ps_comment(FILE *fp, char const *leader, word *words) +{ + fprintf(fp, "%s", leader); + + for (; words; words = words->next) { + char *text; + int type; + + switch (words->type) { + case word_HyperLink: + case word_HyperEnd: + case word_UpperXref: + case word_LowerXref: + case word_XrefEnd: + case word_IndexRef: + continue; + } + + type = removeattr(words->type); + + switch (type) { + case word_Normal: + text = utoa_dup(words->text, CS_ASCII); + break; + case word_WhiteSpace: + text = dupstr(" "); + break; + case word_Quote: + text = dupstr("'"); + break; + } + + fputs(text, fp); + sfree(text); + } + + fprintf(fp, "\n"); }