* PostScript backend for Halibut
*/
+#include <assert.h>
#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");
}
~mdw / sgt / halibut / blobdiff