X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/halibut/blobdiff_plain/4334192268c4b1c0c27a91d043792a21bd8d1292..5b1d0032b0eb6f4a347c0c2cfdbe6e4bb4f959ab:/bk_ps.c

diff --git a/bk_ps.c b/bk_ps.c
index 8fe61c4..358571e 100644
--- a/bk_ps.c
+++ b/bk_ps.c
@@ -6,32 +6,11 @@
 #include "halibut.h"
 #include "paper.h"
 
+static void ps_versionid(FILE *fp, word *words);
+
 paragraph *ps_config_filename(char *filename)
 {
-    paragraph *p;
-    wchar_t *ufilename, *up;
-    int len;
-
-    p = mknew(paragraph);
-    memset(p, 0, sizeof(*p));
-    p->type = para_Config;
-    p->next = NULL;
-    p->fpos.filename = "<command line>";
-    p->fpos.line = p->fpos.col = -1;
-
-    ufilename = ufroma_dup(filename);
-    len = ustrlen(ufilename) + 2 + lenof(L"ps-filename");
-    p->keyword = mknewa(wchar_t, len);
-    up = p->keyword;
-    ustrcpy(up, L"ps-filename");
-    up = uadv(up);
-    ustrcpy(up, ufilename);
-    up = uadv(up);
-    *up = L'\0';
-    assert(up - p->keyword < len);
-    sfree(ufilename);
-
-    return p;
+    return cmdline_cfg_simple("ps-filename", filename, NULL);
 }
 
 void ps_backend(paragraph *sourceform, keywordlist *keywords,
@@ -50,11 +29,10 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
 
     filename = dupstr("output.ps");
     for (p = sourceform; p; p = p->next) {
-	p->private_data = NULL;
 	if (p->type == para_Config && p->parent) {
 	    if (!ustricmp(p->keyword, L"ps-filename")) {
 		sfree(filename);
-		filename = utoa_dup(uadv(p->keyword));
+		filename = dupstr(adv(p->origkeyword));
 	    }
 	}
     }
@@ -72,9 +50,38 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
     fprintf(fp, "%%%%EndComments\n");
 
     fprintf(fp, "%%%%BeginProlog\n");
+    /*
+     * 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
+     */
+    fprintf(fp,
+	    "/t {\n"
+	    "  exch /y exch def {\n"
+	    "    /x exch def\n"
+	    "    x type [] type eq {x aload pop scalefont setfont} if\n"
+	    "    x type dup 1 type eq exch 1.0 type eq or {x y moveto} if\n"
+	    "    x type () type eq {x show} if\n"
+	    "  } forall\n"
+	    "} def\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_versionid(fp, p->words);
+
     /*
      * Re-encode and re-metric the fonts.
      */
@@ -106,31 +113,83 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
     fprintf(fp, "%%%%EndSetup\n");
 
     /*
-     * Output the text.
+     * Output the text and graphics.
      */
     pageno = 0;
     for (page = doc->pages; page; page = page->next) {
-	text_fragment *frag;
+	text_fragment *frag, *frag_end;
+	rect *r;
 
 	pageno++;
 	fprintf(fp, "%%%%Page: %d %d\n", pageno, pageno);
 	fprintf(fp, "%%%%BeginPageSetup\n");
 	fprintf(fp, "%%%%EndPageSetup\n");
 
-	for (frag = page->first_text; frag; frag = frag->next) {
+#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/4096.0, xr->ty/4096.0);
+		fprintf(fp, " %g %g lineto %g %g lineto",
+			xr->lx/4096.0, xr->by/4096.0,
+			xr->rx/4096.0, xr->by/4096.0);
+		fprintf(fp, " %g %g lineto closepath fill grestore\n",
+			xr->rx/4096.0, xr->ty/4096.0);
+	    }
+	}
+#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 / 4096.0, r->y / 4096.0, r->w / 4096.0,
+		    r->h / 4096.0, r->w / 4096.0);
+	}
+
+	frag = page->first_text;
+	while (frag) {
+	    font_encoding *fe;
+	    int fs;
 	    char *c;
 
-	    fprintf(fp, "%s %d scalefont setfont %g %g moveto (",
-		   frag->fe->name, frag->fontsize,
-		   frag->x/4096.0, frag->y/4096.0);
+	    /*
+	     * 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);
 
-	    for (c = frag->text; *c; c++) {
-		if (*c == '(' || *c == ')' || *c == '\\')
-		    fputc('\\', fp);
-		fputc(*c, fp);
+	    fprintf(fp, "%g[", frag->y / 4096.0);
+
+	    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/4096.0);
+		for (c = frag->text; *c; c++) {
+		    if (*c == '(' || *c == ')' || *c == '\\')
+			fputc('\\', fp);
+		    fputc(*c, fp);
+		}
+		fprintf(fp, ")");
+
+		frag = frag->next;
 	    }
 
-	    fprintf(fp, ") show\n");
+	    fprintf(fp, "]t\n");
 	}
 
 	fprintf(fp, "showpage\n");
@@ -142,3 +201,42 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
 
     sfree(filename);
 }
+
+static void ps_versionid(FILE *fp, word *words)
+{
+    fprintf(fp, "%% ");
+
+    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");
+}