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`Ad' is supposed to underline. Found whilst trolling through manuals.
[mandoc.git] / term_ps.c
diff --git a/term_ps.c b/term_ps.c
index 62847ac89d1049f8b1474f507ed169c9bf9c322f..b865f1671ce2b9296b9c22e62dc387167a3dac1d 100644 (file)
--- a/term_ps.c
+++ b/term_ps.c
@@ -1,4 +1,4 @@
-/*     $Id: term_ps.c,v 1.37 2010/07/25 11:44:31 kristaps Exp $ */
+/*     $Id: term_ps.c,v 1.39 2010/07/25 22:15:07 kristaps Exp $ */
 /*
  * Copyright (c) 2010 Kristaps Dzonsons <kristaps@bsd.lv>
  *
@@ -384,6 +384,7 @@ static      void              ps_printf(struct termp *, const char *, ...);
 static void              ps_putchar(struct termp *, char);
 static void              ps_setfont(struct termp *, enum termfont);
 static struct termp     *pspdf_alloc(char *);
+static void              pdf_obj(struct termp *, size_t);
 
 
 void *
@@ -391,10 +392,9 @@ pdf_alloc(char *outopts)
 {
        struct termp    *p;
 
-       if (NULL == (p = pspdf_alloc(outopts)))
-               return(p);
+       if (NULL != (p = pspdf_alloc(outopts)))
+               p->type = TERMTYPE_PDF;
 
-       p->type = TERMTYPE_PDF;
        return(p);
 }
 
@@ -404,10 +404,9 @@ ps_alloc(char *outopts)
 {
        struct termp    *p;
 
-       if (NULL == (p = pspdf_alloc(outopts)))
-               return(p);
+       if (NULL != (p = pspdf_alloc(outopts)))
+               p->type = TERMTYPE_PS;
 
-       p->type = TERMTYPE_PS;
        return(p);
 }
 
@@ -522,6 +521,8 @@ pspdf_free(void *arg)
 
        if (p->engine.ps.psmarg)
                free(p->engine.ps.psmarg);
+       if (p->engine.ps.pdfobjs)
+               free(p->engine.ps.pdfobjs);
 
        term_free(p);
 }
@@ -563,8 +564,6 @@ ps_printf(struct termp *p, const char *fmt, ...)
        va_end(ap);
 
        p->engine.ps.psmargcur = strlen(p->engine.ps.psmarg);
-       p->engine.ps.pdfbytes += /* LINTED */
-               len < 0 ? 0 : (size_t)len;
 }
 
 
@@ -589,52 +588,74 @@ ps_putchar(struct termp *p, char c)
 }
 
 
+static void
+pdf_obj(struct termp *p, size_t obj)
+{
+
+       assert(obj > 0);
+
+       if ((obj - 1) >= p->engine.ps.pdfobjsz) {
+               p->engine.ps.pdfobjsz = obj + 128;
+               p->engine.ps.pdfobjs = realloc
+                       (p->engine.ps.pdfobjs, 
+                        p->engine.ps.pdfobjsz * sizeof(size_t));
+               if (NULL == p->engine.ps.pdfobjs) {
+                       perror(NULL);
+                       exit(EXIT_FAILURE);
+               }
+       }
+
+       p->engine.ps.pdfobjs[(int)obj - 1] = p->engine.ps.pdfbytes;
+       ps_printf(p, "%zu 0 obj\n", obj);
+}
+
+
 static void
 ps_closepage(struct termp *p)
 {
        int              i;
-       size_t           len;
+       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->engine.ps.psmarg && p->engine.ps.psmarg[0]);
        ps_printf(p, "%s", p->engine.ps.psmarg);
 
-       if (TERMTYPE_PS == p->type) {
-               ps_printf(p, "showpage\n");
-       } else {
+       if (TERMTYPE_PS != p->type) {
                ps_printf(p, "ET\n");
+
                len = p->engine.ps.pdfbytes - p->engine.ps.pdflastpg;
-               ps_printf(p, "endstream\n");
-               ps_printf(p, "endobj\n");
-               ps_printf(p, "%zu 0 obj\n", 
-                               p->engine.ps.pdfbody +
-                               (p->engine.ps.pages + 1) * 4 + 1);
-               ps_printf(p, "%zu\n", len);
-               ps_printf(p, "endobj\n");
-               ps_printf(p, "%zu 0 obj\n", 
-                               p->engine.ps.pdfbody +
-                               (p->engine.ps.pages + 1) * 4 + 2);
-               ps_printf(p, "<<\n");
-               ps_printf(p, "/ProcSet [/PDF /Text]\n");
+               base = p->engine.ps.pages * 4 + p->engine.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");
-               ps_printf(p, ">>\n");
-               ps_printf(p, "%zu 0 obj\n", 
-                               p->engine.ps.pdfbody +
-                               (p->engine.ps.pages + 1) * 4 + 3);
+               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",
-                               p->engine.ps.pdfbody +
-                               (p->engine.ps.pages + 1) * 4 + 2);
-               ps_printf(p, "/Contents %zu 0 R\n",
-                               p->engine.ps.pdfbody +
-                               (p->engine.ps.pages + 1) * 4);
-               ps_printf(p, ">>\n");
-               ps_printf(p, "endobj\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->engine.ps.pages++;
        p->engine.ps.psrow = p->engine.ps.top;
@@ -647,7 +668,7 @@ ps_closepage(struct termp *p)
 static void
 ps_end(struct termp *p)
 {
-       size_t           i, xref;
+       size_t           i, xref, base;
 
        /*
         * At the end of the file, do one last showpage.  This is the
@@ -668,9 +689,8 @@ ps_end(struct termp *p)
                return;
        } 
 
-       ps_printf(p, "2 0 obj\n");
-       ps_printf(p, "<<\n");
-       ps_printf(p, "/Type /Pages\n");
+       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->engine.ps.width),
                        (size_t)AFM2PNT(p, p->engine.ps.height));
@@ -679,33 +699,31 @@ ps_end(struct termp *p)
        ps_printf(p, "/Kids [");
 
        for (i = 0; i < p->engine.ps.pages; i++)
-               ps_printf(p, " %zu 0 R", 
-                               p->engine.ps.pdfbody +
-                               (i + 1) * 4 + 3);
-       ps_printf(p, "]\n");
-       ps_printf(p, ">>\n");
-       ps_printf(p, "endobj\n");
-       ps_printf(p, "%zu 0 obj\n",
-                       p->engine.ps.pdfbody +
-                       (p->engine.ps.pages * 4) + 4);
+               ps_printf(p, " %zu 0 R", i * 4 +
+                               p->engine.ps.pdfbody + 3);
+
+       base = (p->engine.ps.pages - 1) * 4 + 
+               p->engine.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->engine.ps.pdfbytes;
        ps_printf(p, "xref\n");
-       ps_printf(p, "0 %zu\n",
-                       p->engine.ps.pdfbody +
-                       (p->engine.ps.pages * 4) + 5);
-       ps_printf(p, "0000000000 65535 f\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->engine.ps.pdfobjs[(int)i]);
+
        ps_printf(p, "trailer\n");
        ps_printf(p, "<<\n");
-       ps_printf(p, "/Size %zu\n", 
-                       p->engine.ps.pdfbody +
-                       (p->engine.ps.pages * 4) + 5);
-       ps_printf(p, "/Root %zu 0 R\n", 
-                       p->engine.ps.pdfbody +
-                       (p->engine.ps.pages * 4) + 4);
+       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");
@@ -730,7 +748,7 @@ ps_begin(struct termp *p)
                p->engine.ps.psmarg[0] = '\0';
        }
 
-       p->engine.ps.pdfbytes = 0;
+       /*p->engine.ps.pdfbytes = 0;*/
        p->engine.ps.psmargcur = 0;
        p->engine.ps.flags = PS_MARGINS;
        p->engine.ps.pscol = p->engine.ps.left;
@@ -780,14 +798,14 @@ ps_begin(struct termp *p)
                ps_printf(p, "\n%%%%EndComments\n");
        } else {
                ps_printf(p, "%%PDF-1.1\n");
-               ps_printf(p, "1 0 obj\n");
+               pdf_obj(p, 1);
                ps_printf(p, "<<\n");
                ps_printf(p, "/Creator mandoc-%s\n", VERSION);
                ps_printf(p, ">>\n");
                ps_printf(p, "endobj\n");
 
                for (i = 0; i < (int)TERMFONT__MAX; i++) {
-                       ps_printf(p, "%d 0 obj\n", i + 3);
+                       pdf_obj(p, (size_t)i + 3);
                        ps_printf(p, "<<\n");
                        ps_printf(p, "/Type /Font\n");
                        ps_printf(p, "/Subtype /Type1\n");
@@ -824,13 +842,12 @@ ps_pletter(struct termp *p, int c)
                                        fonts[(int)p->engine.ps.lastf].name, 
                                        p->engine.ps.scale);
                } else {
-                       ps_printf(p, "%zu 0 obj\n", 
-                                       p->engine.ps.pdfbody +
-                                       (p->engine.ps.pages + 1) * 4);
+                       pdf_obj(p, p->engine.ps.pdfbody + 
+                                       p->engine.ps.pages * 4);
                        ps_printf(p, "<<\n");
                        ps_printf(p, "/Length %zu 0 R\n", 
-                                       p->engine.ps.pdfbody +
-                                       (p->engine.ps.pages + 1) * 4 + 1);
+                                       p->engine.ps.pdfbody + 1 +
+                                       p->engine.ps.pages * 4);
                        ps_printf(p, ">>\nstream\n");
                }
                p->engine.ps.pdflastpg = p->engine.ps.pdfbytes;
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