* PostScript backend for Halibut
*/
+#include <assert.h>
+#include <stdarg.h>
#include "halibut.h"
+#include "paper.h"
+
+/* Ideal number of characters per line, for use in PostScript code */
+#define PS_WIDTH 79
+/* Absolute maxiumum characters per line, for use in DSC comments */
+#define PS_MAXWIDTH 255
+
+static void ps_comment(FILE *fp, char const *leader, word *words);
+static void ps_string_len(FILE *fp, int *cc, char const *str, int len);
+static void ps_string(FILE *fp, int *cc, char const *str);
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;
+ outline_element *oe;
+ int noe;
+ int cc; /* Character count on current line */
+
+ 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));
+ }
+ }
+ }
+
+ if (!strcmp(filename, "-"))
+ fp = stdout;
+ else
+ 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: Clean7Bit\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. */
+ if (!fe->font->info->fontfile)
+ fprintf(fp, "%%%%+ font %s\n", fe->font->info->name);
+ fprintf(fp, "%%%%DocumentSuppliedResources: procset Halibut 0 3\n");
+ for (fe = doc->fonts->head; fe; fe = fe->next)
+ /* XXX This may request the same font multiple times. */
+ if (fe->font->info->fontfile)
+ fprintf(fp, "%%%%+ font %s\n", fe->font->info->name);
+ fprintf(fp, "%%%%EndComments\n");
+
+ fprintf(fp, "%%%%BeginProlog\n");
+ fprintf(fp, "%%%%BeginResource: procset Halibut 0 3\n");
+ /*
+ * Supply a prologue function which allows a reasonably
+ * compressed representation of the text on the pages.
+ *
+ * "t" 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
+ *
+ * "r" takes four arguments, and behaves like "rectfill".
+ */
+ 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"
+ "/r { 4 2 roll moveto 1 index 0 rlineto 0 exch rlineto\n"
+ " neg 0 rlineto closepath fill } bind def\n");
+ /*
+ * pdfmark wrappers
+ *
+ * "p" generates a named destination referencing this page.
+ * "x" generates a link to a named destination.
+ * "u" generates a link to a URI.
+ * "o" generates an outline entry.
+ * "m" generates a general pdfmark.
+ *
+ * They all do nothing if pdfmark is undefined.
+ */
+ fprintf(fp,
+ "/pdfmark where { pop\n"
+ " /p { [ /Dest 3 -1 roll /View [ /XYZ null null null ]\n"
+ " /DEST pdfmark } bind def\n"
+ " /x { [ /Dest 3 -1 roll /Rect 5 -1 roll /Border [0 0 0]\n"
+ " /Subtype /Link /ANN pdfmark } bind def\n"
+ " /u { 2 dict dup /Subtype /URI put dup /URI 4 -1 roll put\n"
+ " [ /Action 3 -1 roll /Rect 5 -1 roll /Border [0 0 0]\n"
+ " /Subtype /Link /ANN pdfmark } bind def\n"
+ " /o { [ /Count 3 -1 roll /Dest 5 -1 roll /Title 7 -1 roll\n"
+ " /OUT pdfmark } bind def\n"
+ " /m /pdfmark load def\n"
+ "}\n");
+ fprintf(fp, "{\n"
+ " /p { pop } bind def\n"
+ " /x { pop pop } bind def\n"
+ " /u /x load def\n"
+ " /o { pop pop pop } bind def\n"
+ " /m /cleartomark load def\n"
+ "} ifelse\n");
+
+ fprintf(fp, "%%%%EndResource\n");
+ fprintf(fp, "%%%%EndProlog\n");
+
+ fprintf(fp, "%%%%BeginSetup\n");
+
+ /*
+ * Assign a destination name to each page for pdfmark purposes.
+ */
+ pageno = 0;
+ for (page = doc->pages; page; page = page->next) {
+ char *buf;
+ pageno++;
+ buf = snewn(12, char);
+ sprintf(buf, "/p%d", pageno);
+ page->spare = buf;
+ }
+
+ /*
+ * 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);
+
+ cc = 0;
+ /*
+ * Request the correct page size. We might want to bracket this
+ * with "%%BeginFeature: *PageSize A4" or similar, and "%%EndFeature",
+ * but that would require us to have a way of getting the name of
+ * the page size given its dimensions.
+ */
+ ps_token(fp, &cc, "/setpagedevice where {\n");
+ ps_token(fp, &cc, " pop 2 dict dup /PageSize [%g %g] put setpagedevice\n",
+ doc->paper_width / FUNITS_PER_PT,
+ doc->paper_height / FUNITS_PER_PT);
+ ps_token(fp, &cc, "} if\n");
+
+ ps_token(fp, &cc, "[/PageMode/UseOutlines/DOCVIEW m\n");
+ noe = doc->n_outline_elements;
+ for (oe = doc->outline_elements; noe; oe++, noe--) {
+ char *title;
+ int titlelen, count, i;
+
+ title = pdf_outline_convert(oe->pdata->outline_title, &titlelen);
+ if (oe->level == 0) {
+ ps_token(fp, &cc, "[/Title");
+ ps_string_len(fp, &cc, title, titlelen);
+ ps_token(fp, &cc, "/DOCINFO m\n");
+ }
+
+ count = 0;
+ for (i = 1; i < noe && oe[i].level > oe->level; i++)
+ if (oe[i].level == oe->level + 1)
+ count++;
+ if (oe->level > 0) count = -count;
+
+ ps_string_len(fp, &cc, title, titlelen);
+ sfree(title);
+ ps_token(fp, &cc, "%s %d o\n",
+ (char *)oe->pdata->first->page->spare, count);
+ }
+
+ for (fe = doc->fonts->head; fe; fe = fe->next) {
+ /* XXX This may request the same font multiple times. */
+ if (fe->font->info->fontfile) {
+ fprintf(fp, "%%%%BeginResource: font %s\n", fe->font->info->name);
+ if (fe->font->info->filetype == TYPE1)
+ pf_writeps(fe->font->info, fp);
+ else
+ sfnt_writeps(fe->font->info, fp);
+ fprintf(fp, "%%%%EndResource\n");
+ } else {
+ fprintf(fp, "%%%%IncludeResource: font %s\n",
+ fe->font->info->name);
+ }
+ }
+
/*
- * FIXME
+ * Re-encode the fonts.
*/
- printf("[ps] %p = %s\n", unused, unused);
+ 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);
+
+ ps_token(fp, &cc, "/%s findfont dup length dict begin\n",
+ fe->font->info->name);
+ ps_token(fp, &cc, "{1 index /FID ne {def} {pop pop} ifelse} forall\n");
+ ps_token(fp, &cc, "/Encoding [\n");
+ for (i = 0; i < 256; i++)
+ ps_token(fp, &cc, "/%s", glyph_extern(fe->vector[i]));
+ ps_token(fp, &cc, "] def\n");
+ ps_token(fp, &cc, "currentdict end\n");
+ ps_token(fp, &cc, "/fontname-%s exch definefont /%s exch def\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;
+ xref *xr;
+ font_encoding *fe;
+ int fs;
+
+ pageno++;
+ fprintf(fp, "%%%%Page: %d %d\n", pageno, pageno);
+ cc = 0;
+ ps_token(fp, &cc, "save %s p\n", (char *)page->spare);
+
+ for (xr = page->first_xref; xr; xr = xr->next) {
+ ps_token(fp, &cc, "[%g %g %g %g]",
+ xr->lx/FUNITS_PER_PT, xr->by/FUNITS_PER_PT,
+ xr->rx/FUNITS_PER_PT, xr->ty/FUNITS_PER_PT);
+ if (xr->dest.type == PAGE) {
+ ps_token(fp, &cc, "%s x\n", (char *)xr->dest.page->spare);
+ } else {
+ ps_string(fp, &cc, xr->dest.url);
+ ps_token(fp, &cc, "u\n");
+ }
+ }
+
+ for (r = page->first_rect; r; r = r->next) {
+ ps_token(fp, &cc, "%g %g %g %g r\n",
+ r->x / FUNITS_PER_PT, r->y / FUNITS_PER_PT,
+ r->w / FUNITS_PER_PT, r->h / FUNITS_PER_PT);
+ }
+
+ frag = page->first_text;
+ fe = NULL;
+ fs = -1;
+ while (frag) {
+ /*
+ * 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);
+
+ ps_token(fp, &cc, "%g[", frag->y / FUNITS_PER_PT);
+
+ while (frag && frag != frag_end) {
+
+ if (frag->fe != fe || frag->fontsize != fs)
+ ps_token(fp, &cc, "[%s %d]",
+ frag->fe->name, frag->fontsize);
+ fe = frag->fe;
+ fs = frag->fontsize;
+
+ ps_token(fp, &cc, "%g", frag->x/FUNITS_PER_PT);
+ ps_string(fp, &cc, frag->text);
+
+ frag = frag->next;
+ }
+
+ ps_token(fp, &cc, "]t\n");
+ }
+
+ ps_token(fp, &cc, "restore showpage\n");
+ }
+
+ fprintf(fp, "%%%%EOF\n");
+
+ if (fp != stdout)
+ fclose(fp);
+
+ sfree(filename);
+}
+
+static void ps_comment(FILE *fp, char const *leader, word *words) {
+ int cc = 0;
+
+ cc += 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;
+ }
+
+ if (cc + strlen(text) > PS_MAXWIDTH)
+ text[PS_MAXWIDTH - cc] = 0;
+ cc += fprintf(fp, "%s", text);
+ sfree(text);
+ }
+
+ fprintf(fp, "\n");
+}
+
+void ps_token(FILE *fp, int *cc, char const *fmt, ...) {
+ va_list ap;
+
+ va_start(ap, fmt);
+ if (*cc >= PS_WIDTH - 10) {
+ fprintf(fp, "\n");
+ *cc = 0;
+ }
+ *cc += vfprintf(fp, fmt, ap);
+ /* Assume that \n only occurs at the end of a string */
+ if (fmt[strlen(fmt) - 1] == '\n')
+ *cc = 0;
+}
+
+static void ps_string_len(FILE *fp, int *cc, char const *str, int len) {
+ char const *c;
+ int score = 0;
+
+ for (c = str; c < str+len; c++) {
+ if (*c < ' ' || *c > '~')
+ score += 2;
+ else if (*c == '(' || *c == ')' || *c == '\\')
+ score += 0;
+ else
+ score -= 1;
+ }
+ if (score > 0) {
+ ps_token(fp, cc, "<");
+ for (c = str; c < str+len; c++) {
+ ps_token(fp, cc, "%02X", 0xFF & (int)*c);
+ }
+ ps_token(fp, cc, ">");
+ } else {
+ *cc += fprintf(fp, "(");
+ for (c = str; c < str+len; c++) {
+ if (*cc >= PS_WIDTH - 4) {
+ fprintf(fp, "\\\n");
+ *cc = 0;
+ }
+ if (*c < ' ' || *c > '~') {
+ *cc += fprintf(fp, "\\%03o", 0xFF & (int)*c);
+ } else {
+ if (*c == '(' || *c == ')' || *c == '\\') {
+ fputc('\\', fp);
+ (*cc)++;
+ }
+ fputc(*c, fp);
+ (*cc)++;
+ }
+ }
+ *cc += fprintf(fp, ")");
+ }
+}
+
+static void ps_string(FILE *fp, int *cc, char const *str) {
+ ps_string_len(fp, cc, str, strlen(str));
}
~mdw / sgt / halibut / blobdiff