pdftexdir: support system poppler 0.86.0

git-svn-id: svn://tug.org/texlive/trunk@53972 c570f23f-e606-0410-a88d-b1316a301751

4 files changed, 1118 insertions, 3 deletions

diff --git a/Build/source/texk/web2c/pdftexdir/ChangeLog b/Build/source/texk/web2c/pdftexdir/ChangeLog
index d1576ef7ed7..4c695dce36c 100644
--- a/Build/source/texk/web2c/pdftexdir/ChangeLog
+++ b/Build/source/texk/web2c/pdftexdir/ChangeLog
@@ -1,3 +1,7 @@
+2020-02-29  Akira Kakuto  <kakuto@w32tex.org>
+
+	Add pdftoepdf-poppler0.86.0.cc to support system poppler 0.86.0.
+
 2019-12-30  Akira Kakuto  <kakuto@w32tex.org>
 
 	* utils.c: Not include poppler-config.h, by assuming that
diff --git a/Build/source/texk/web2c/pdftexdir/NEWS b/Build/source/texk/web2c/pdftexdir/NEWS
index 16ccbefcb6b..0145824e14b 100644
--- a/Build/source/texk/web2c/pdftexdir/NEWS
+++ b/Build/source/texk/web2c/pdftexdir/NEWS
@@ -49,11 +49,12 @@ pdfTeX 3.14159265-2.6-1.40.19 (TeX Live 2018)  (April 14, 2018)
   pdftoepdf-poppler0.72.0.cc for poppler-0.72.0 upto poppler-0.74.0.
   pdftoepdf-poppler0.75.0.cc for poppler-0.75.0.
   pdftoepdf-poppler0.76.0.cc for poppler-0.76.0 upto poppler-0.82.0.
-  pdftoepdf-poppler0.83.0.cc for poppler-0.83.0 and newer.
+  pdftoepdf-poppler0.83.0.cc for poppler-0.83.0 upto poppler-0.85.0.
+  pdftoepdf-poppler0.86.0.cc for poppler-0.86.0 and newer.
   Note that pdftosrc-*.cc and pdftoepdf-*.cc should be
   renamed as pdftosrc.cc, and pdftoepdf.cc, respectively, before
   compilation. Further, POPPLER_VERSION should be defined properly
-  like -DPOPPLER_VERSION='"0.84.0"'.
+  like -DPOPPLER_VERSION='"0.86.0"'.
 
 ---------------------------------------------------------------
 pdfTeX 3.14159265-2.6-1.40.18 (TeX Live 2017)  (April 27, 2017)
diff --git a/Build/source/texk/web2c/pdftexdir/pdftoepdf-poppler0.83.0.cc b/Build/source/texk/web2c/pdftexdir/pdftoepdf-poppler0.83.0.cc
index 6204548e317..20ee8a66c26 100644
--- a/Build/source/texk/web2c/pdftexdir/pdftoepdf-poppler0.83.0.cc
+++ b/Build/source/texk/web2c/pdftexdir/pdftoepdf-poppler0.83.0.cc
@@ -22,7 +22,7 @@ This is based on the patch texlive-poppler-0.59.patch <2017-09-19> at
 https://git.archlinux.org/svntogit/packages.git/plain/texlive-bin/trunk
 by Arch Linux. A little modifications are made to avoid a crash for
 some kind of pdf images, such as figure_missing.pdf in gnuplot.
-The poppler should be 0.83.0 or newer versions.
+The poppler should be 0.83.0 up to 0.85.0.
 POPPLER_VERSION should be defined.
 */
 
diff --git a/Build/source/texk/web2c/pdftexdir/pdftoepdf-poppler0.86.0.cc b/Build/source/texk/web2c/pdftexdir/pdftoepdf-poppler0.86.0.cc
new file mode 100644
index 00000000000..b9cdf38e62d
--- /dev/null
+++ b/Build/source/texk/web2c/pdftexdir/pdftoepdf-poppler0.86.0.cc
@@ -0,0 +1,1110 @@
+/*
+Copyright 1996-2017 Han The Thanh, <thanh@pdftex.org>
+
+This file is part of pdfTeX.
+
+pdfTeX is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+pdfTeX is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along
+with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*
+This is based on the patch texlive-poppler-0.59.patch <2017-09-19> at
+https://git.archlinux.org/svntogit/packages.git/plain/texlive-bin/trunk
+by Arch Linux. A little modifications are made to avoid a crash for
+some kind of pdf images, such as figure_missing.pdf in gnuplot.
+The poppler should be 0.86.0 or newer versions.
+POPPLER_VERSION should be defined.
+*/
+
+/* Do this early in order to avoid a conflict between
+   MINGW32 <rpcndr.h> defining 'boolean' as 'unsigned char' and
+   <kpathsea/types.h> defining Pascal's boolean as 'int'.
+*/
+#include <w2c/config.h>
+#include <kpathsea/lib.h>
+
+#include <stdlib.h>
+#include <math.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+
+#ifdef POPPLER_VERSION
+#include <dirent.h>
+#include <poppler-config.h>
+#include <goo/GooString.h>
+#include <goo/gmem.h>
+#include <goo/gfile.h>
+#define GString GooString
+#else
+#error POPPLER_VERSION should be defined.
+#endif
+#include <assert.h>
+
+#include "Object.h"
+#include "Stream.h"
+#include "Array.h"
+#include "Dict.h"
+#include "XRef.h"
+#include "Catalog.h"
+#include "Link.h"
+#include "Page.h"
+#include "GfxFont.h"
+#include "PDFDoc.h"
+#include "GlobalParams.h"
+#include "Error.h"
+
+// This file is mostly C and not very much C++; it's just used to interface
+// the functions of xpdf, which are written in C++.
+
+extern "C" {
+#include <pdftexdir/ptexmac.h>
+#include <pdftexdir/pdftex-common.h>
+
+// These functions from pdftex.web gets declared in pdftexcoerce.h in the
+// usual web2c way, but we cannot include that file here because C++
+// does not allow it.
+extern int getpdfsuppresswarningpagegroup(void);
+extern integer getpdfsuppressptexinfo(void);
+extern integer zround(double);
+}
+
+// The prefix "PTEX" for the PDF keys is special to pdfTeX;
+// this has been registered with Adobe by Hans Hagen.
+
+#define pdfkeyprefix "PTEX"
+
+#define MASK_SUPPRESS_PTEX_FULLBANNER 0x01
+#define MASK_SUPPRESS_PTEX_FILENAME   0x02
+#define MASK_SUPPRESS_PTEX_PAGENUMBER 0x04
+#define MASK_SUPPRESS_PTEX_INFODICT   0x08
+
+// When copying the Resources of the selected page, all objects are copied
+// recusively top-down. Indirect objects however are not fetched during
+// copying, but get a new object number from pdfTeX and then will be
+// appended into a linked list. Duplicates are checked and removed from the
+// list of indirect objects during appending.
+
+enum InObjType {
+    objFont,
+    objFontDesc,
+    objOther
+};
+
+struct InObj {
+    Ref ref;                    // ref in original PDF
+    InObjType type;             // object type
+    InObj *next;                // next entry in list of indirect objects
+    int num;                    // new object number in output PDF
+    fd_entry *fd;               // pointer to /FontDescriptor object structure
+    int enc_objnum;             // Encoding for objFont
+    int written;                // has it been written to output PDF?
+};
+
+struct UsedEncoding {
+    int enc_objnum;
+    GfxFont *font;
+    UsedEncoding *next;
+};
+
+static InObj *inObjList;
+static UsedEncoding *encodingList;
+static bool isInit = false;
+
+// --------------------------------------------------------------------
+// Maintain list of open embedded PDF files
+// --------------------------------------------------------------------
+
+struct PdfDocument {
+    char *file_name;
+    PDFDoc *doc;
+    XRef *xref;
+    InObj *inObjList;
+    int occurences;             // number of references to the document; the doc can be
+    // deleted when this is negative
+    PdfDocument *next;
+};
+
+static PdfDocument *pdfDocuments = 0;
+
+static XRef *xref = 0;
+
+// Returns pointer to PdfDocument record for PDF file.
+// Creates a new record if it doesn't exist yet.
+// xref is made current for the document.
+
+static PdfDocument *find_add_document(char *file_name)
+{
+    PdfDocument *p = pdfDocuments;
+    while (p && strcmp(p->file_name, file_name) != 0)
+        p = p->next;
+    if (p) {
+        xref = p->xref;
+        (p->occurences)++;
+        return p;
+    }
+    p = new PdfDocument;
+    p->file_name = xstrdup(file_name);
+    p->xref = xref = 0;
+    p->occurences = 0;
+    GString *docName = new GString(p->file_name);
+    p->doc = new PDFDoc(docName);       // takes ownership of docName
+    if (!p->doc->isOk() || !p->doc->okToPrint()) {
+        pdftex_fail("xpdf: reading PDF image failed");
+    }
+    p->inObjList = 0;
+    p->next = pdfDocuments;
+    pdfDocuments = p;
+    return p;
+}
+
+// Deallocate a PdfDocument with all its resources
+
+static void delete_document(PdfDocument * pdf_doc)
+{
+    PdfDocument **p = &pdfDocuments;
+    while (*p && *p != pdf_doc)
+        p = &((*p)->next);
+    // should not happen:
+    if (!*p)
+        return;
+    // unlink from list
+    *p = pdf_doc->next;
+    // free pdf_doc's resources
+    InObj *r, *n;
+    for (r = pdf_doc->inObjList; r != 0; r = n) {
+        n = r->next;
+        delete r;
+    }
+    xref = pdf_doc->xref;
+    delete pdf_doc->doc;
+    xfree(pdf_doc->file_name);
+    delete pdf_doc;
+}
+
+// --------------------------------------------------------------------
+
+static int addEncoding(GfxFont * gfont)
+{
+    UsedEncoding *n;
+    n = new UsedEncoding;
+    n->next = encodingList;
+    encodingList = n;
+    n->font = gfont;
+    n->enc_objnum = pdfnewobjnum();
+    return n->enc_objnum;
+}
+
+#define addFont(ref, fd, enc_objnum) \
+        addInObj(objFont, ref, fd, enc_objnum)
+
+// addFontDesc is only used to avoid writing the original FontDescriptor
+// from the PDF file.
+
+#define addFontDesc(ref, fd) \
+        addInObj(objFontDesc, ref, fd, 0)
+
+#define addOther(ref) \
+        addInObj(objOther, ref, 0, 0)
+
+static int addInObj(InObjType type, Ref ref, fd_entry * fd, int e)
+{
+    InObj *p, *q, *n = new InObj;
+    if (ref.num == 0)
+        pdftex_fail("PDF inclusion: invalid reference");
+    n->ref = ref;
+    n->type = type;
+    n->next = 0;
+    n->fd = fd;
+    n->enc_objnum = e;
+    n->written = 0;
+    if (inObjList == 0)
+        inObjList = n;
+    else {
+        for (p = inObjList; p != 0; p = p->next) {
+            if (p->ref.num == ref.num && p->ref.gen == ref.gen) {
+                delete n;
+                return p->num;
+            }
+            q = p;
+        }
+        // it is important to add new objects at the end of the list,
+        // because new objects are being added while the list is being
+        // written out.
+        q->next = n;
+    }
+    if (type == objFontDesc)
+        n->num = get_fd_objnum(fd);
+    else
+        n->num = pdfnewobjnum();
+    return n->num;
+}
+
+#if 0 /* unusewd */
+static int getNewObjectNumber(Ref ref)
+{
+    InObj *p;
+    if (inObjList == 0) {
+        pdftex_fail("No objects copied yet");
+    } else {
+        for (p = inObjList; p != 0; p = p->next) {
+            if (p->ref.num == ref.num && p->ref.gen == ref.gen) {
+                return p->num;
+            }
+        }
+        pdftex_fail("Object not yet copied: %i %i", ref.num, ref.gen);
+    }
+#ifdef _MSC_VER
+    /* Never reached, but without __attribute__((noreturn)) for pdftex_fail()
+       MSVC 5.0 requires an int return value.  */
+    return -60000;
+#endif
+}
+#endif
+
+static void copyObject(Object *);
+
+static void copyName(char *s)
+{
+    pdf_puts("/");
+    for (; *s != 0; s++) {
+        if (isdigit(*s) || isupper(*s) || islower(*s) || *s == '_' ||
+            *s == '.' || *s == '-' || *s == '+')
+            pdfout(*s);
+        else
+            pdf_printf("#%.2X", *s & 0xFF);
+    }
+}
+
+static void copyDictEntry(Object * obj, int i)
+{
+    Object obj1;
+    copyName((char *)obj->dictGetKey(i));
+    pdf_puts(" ");
+    obj1 = obj->dictGetValNF(i).copy();
+    copyObject(&obj1);
+    pdf_puts("\n");
+}
+
+static void copyDict(Object * obj)
+{
+    int i, l;
+    if (!obj->isDict())
+        pdftex_fail("PDF inclusion: invalid dict type <%s>",
+                    obj->getTypeName());
+    for (i = 0, l = obj->dictGetLength(); i < l; ++i)
+        copyDictEntry(obj, i);
+}
+
+static void copyFontDict(Object * obj, InObj * r)
+{
+    int i, l;
+    char *key;
+    if (!obj->isDict())
+        pdftex_fail("PDF inclusion: invalid dict type <%s>",
+                    obj->getTypeName());
+    pdf_puts("<<\n");
+    assert(r->type == objFont); // FontDescriptor is in fd_tree
+    for (i = 0, l = obj->dictGetLength(); i < l; ++i) {
+        key = (char *)obj->dictGetKey(i);
+        if (strncmp("FontDescriptor", key, strlen("FontDescriptor")) == 0
+            || strncmp("BaseFont", key, strlen("BaseFont")) == 0
+            || strncmp("Encoding", key, strlen("Encoding")) == 0)
+            continue;           // skip original values
+        copyDictEntry(obj, i);
+    }
+    // write new FontDescriptor, BaseFont, and Encoding
+    pdf_printf("/FontDescriptor %d 0 R\n", get_fd_objnum(r->fd));
+    pdf_printf("/BaseFont %d 0 R\n", get_fn_objnum(r->fd));
+    pdf_printf("/Encoding %d 0 R\n", r->enc_objnum);
+    pdf_puts(">>");
+}
+
+static void copyStream(Stream * str)
+{
+    int c, c2 = 0;
+    str->reset();
+    while ((c = str->getChar()) != EOF) {
+        pdfout(c);
+        c2 = c;
+    }
+    pdflastbyte = c2;
+}
+
+static void copyProcSet(Object * obj)
+{
+    int i, l;
+    Object procset;
+    if (!obj->isArray())
+        pdftex_fail("PDF inclusion: invalid ProcSet array type <%s>",
+                    obj->getTypeName());
+    pdf_puts("/ProcSet [ ");
+    for (i = 0, l = obj->arrayGetLength(); i < l; ++i) {
+        procset = obj->arrayGetNF(i).copy();
+        if (!procset.isName())
+            pdftex_fail("PDF inclusion: invalid ProcSet entry type <%s>",
+                        procset.getTypeName());
+        copyName((char *)procset.getName());
+        pdf_puts(" ");
+    }
+    pdf_puts("]\n");
+}
+
+#define REPLACE_TYPE1C true
+
+static bool embeddableFont(Object * fontdesc)
+{
+    Object fontfile, ffsubtype;
+
+    if (!fontdesc->isDict())
+        return false;
+    fontfile = fontdesc->dictLookup("FontFile");
+    if (fontfile.isStream())
+        return true;
+    if (REPLACE_TYPE1C) {
+        fontfile = fontdesc->dictLookup("FontFile3");
+        if (!fontfile.isStream())
+            return false;
+        ffsubtype = fontfile.streamGetDict()->lookup("Subtype");
+        return ffsubtype.isName() && !strcmp(ffsubtype.getName(), "Type1C");
+    }
+    return false;
+}
+
+static void copyFont(char *tag, Object * fontRef)
+{
+    Object fontdict, subtype, basefont, fontdescRef, fontdesc, charset,
+        stemV;
+    GfxFont *gfont;
+    fd_entry *fd;
+    fm_entry *fontmap;
+    // Check whether the font has already been embedded before analysing it.
+    InObj *p;
+    Ref ref = fontRef->getRef();
+    for (p = inObjList; p; p = p->next) {
+        if (p->ref.num == ref.num && p->ref.gen == ref.gen) {
+            copyName(tag);
+            pdf_printf(" %d 0 R ", p->num);
+            return;
+        }
+    }
+    // Only handle included Type1 (and Type1C) fonts; anything else will be copied.
+    // Type1C fonts are replaced by Type1 fonts, if REPLACE_TYPE1C is true.
+    fontdict = fontRef->fetch(xref);
+    fontdesc = Object(objNull);
+    if (fontdict.isDict()) {
+        subtype = fontdict.dictLookup("Subtype");
+        basefont = fontdict.dictLookup("BaseFont");
+        fontdescRef = fontdict.dictLookupNF("FontDescriptor").copy();
+        if (fontdescRef.isRef()) {
+            fontdesc = fontdescRef.fetch(xref);
+        }
+    }
+    if (!fixedinclusioncopyfont && fontdict.isDict()
+        && subtype.isName()
+        && !strcmp(subtype.getName(), "Type1")
+        && basefont.isName()
+        && fontdescRef.isRef()
+        && fontdesc.isDict()
+        && embeddableFont(&fontdesc)
+        && (fontmap = lookup_fontmap((char *)basefont.getName())) != NULL) {
+        // round /StemV value, since the PDF input is a float
+        // (see Font Descriptors in PDF reference), but we only store an
+        // integer, since we don't want to change the struct.
+        stemV = fontdesc.dictLookup("StemV");
+        fd = epdf_create_fontdescriptor(fontmap, zround(stemV.getNum()));
+        charset = fontdesc.dictLookup("CharSet");
+        if (!charset.isNull() &&
+            charset.isString() && is_subsetable(fontmap))
+            epdf_mark_glyphs(fd, (char *)charset.getString()->c_str());
+        else
+            embed_whole_font(fd);
+        addFontDesc(fontdescRef.getRef(), fd);
+        copyName(tag);
+        gfont = GfxFont::makeFont(xref, tag, fontRef->getRef(),
+                                  fontdict.getDict());
+        pdf_printf(" %d 0 R ", addFont(fontRef->getRef(), fd,
+                                       addEncoding(gfont)));
+    } else {
+        copyName(tag);
+        pdf_puts(" ");
+        copyObject(fontRef);
+    }
+}
+
+static void copyFontResources(Object * obj)
+{
+    Object fontRef;
+    int i, l;
+    if (!obj->isDict())
+        pdftex_fail("PDF inclusion: invalid font resources dict type <%s>",
+                    obj->getTypeName());
+    pdf_puts("/Font << ");
+    for (i = 0, l = obj->dictGetLength(); i < l; ++i) {
+        fontRef = obj->dictGetValNF(i).copy();
+        if (fontRef.isRef())
+            copyFont((char *)obj->dictGetKey(i), &fontRef);
+        else if (fontRef.isDict()) {   // some programs generate pdf with embedded font object
+            copyName((char *)obj->dictGetKey(i));
+            pdf_puts(" ");
+            copyObject(&fontRef);
+        }
+        else
+            pdftex_fail("PDF inclusion: invalid font in reference type <%s>",
+                        fontRef.getTypeName());
+    }
+    pdf_puts(">>\n");
+}
+
+static void copyOtherResources(Object * obj, char *key)
+{
+    // copies all other resources (write_epdf handles Fonts and ProcSets),
+
+    // if Subtype is present, it must be a name
+    if (strcmp("Subtype", key) == 0) {
+        if (!obj->isName()) {
+            pdftex_warn("PDF inclusion: Subtype in Resources dict is not a name"
+                        " (key '%s', type <%s>); ignored.",
+                        key, obj->getTypeName());
+            return;
+        }
+    } else if (!obj->isDict()) {
+        //FIXME: Write the message only to the log file
+        pdftex_warn("PDF inclusion: invalid other resource which is no dict"
+                    " (key '%s', type <%s>); ignored.",
+                    key, obj->getTypeName());
+        return;
+    }
+    copyName(key);
+    pdf_puts(" ");
+    copyObject(obj);
+}
+
+// Function onverts double to string; very small and very large numbers
+// are NOT converted to scientific notation.
+// n must be a number or real conforming to the implementation limits
+// of PDF as specified in appendix C.1 of the PDF Ref.
+// These are:
+// maximum value of ints is +2^32
+// maximum value of reals is +2^15
+// smalles values of reals is 1/(2^16)
+
+static char *convertNumToPDF(double n)
+{
+    static const int precision = 6;
+    static const int fact = (int) 1E6;  // must be 10^precision
+    static const double epsilon = 0.5E-6;       // 2epsilon must be 10^-precision
+    static char buf[64];
+    // handle very small values: return 0
+    if (fabs(n) < epsilon) {
+        buf[0] = '0';
+        buf[1] = '\0';
+    } else {
+        char ints[64];
+        int bindex = 0, sindex = 0;
+        int ival, fval;
+        // handle the sign part if n is negative
+        if (n < 0) {
+            buf[bindex++] = '-';
+            n = -n;
+        }
+        n += epsilon;           // for rounding
+        // handle the integer part, simply with sprintf
+        ival = (int) floor(n);
+        n -= ival;
+        sprintf(ints, "%d", ival);
+        while (ints[sindex] != 0)
+            buf[bindex++] = ints[sindex++];
+        // handle the fractional part up to 'precision' digits
+        fval = (int) floor(n * fact);
+        if (fval) {
+            // set a dot
+            buf[bindex++] = '.';
+            sindex = bindex + precision;
+            buf[sindex--] = '\0';
+            // fill up trailing zeros with the string terminator NULL
+            while (((fval % 10) == 0) && (sindex >= bindex)) {
+                buf[sindex--] = '\0';
+                fval /= 10;
+            }
+            // fill up the fractional part back to front
+            while (sindex >= bindex) {
+                buf[sindex--] = (fval % 10) + '0';
+                fval /= 10;
+            }
+        } else
+            buf[bindex++] = 0;
+    }
+    return (char *) buf;
+}
+
+static void copyObject(Object * obj)
+{
+    Object obj1;
+    int i, l, c;
+    Ref ref;
+    char *p;
+    GString *s;
+    if (obj->isBool()) {
+        pdf_printf("%s", obj->getBool()? "true" : "false");
+    } else if (obj->isInt()) {
+        pdf_printf("%i", obj->getInt());
+    } else if (obj->isReal()) {
+        pdf_printf("%s", convertNumToPDF(obj->getReal()));
+    } else if (obj->isNum()) {
+        pdf_printf("%s", convertNumToPDF(obj->getNum()));
+    } else if (obj->isString()) {
+        s = (GooString *)obj->getString();
+        p = (char *)s->c_str();
+        l = s->getLength();
+        if (strlen(p) == (unsigned int) l) {
+            pdf_puts("(");
+            for (; *p != 0; p++) {
+                c = (unsigned char) *p;
+                if (c == '(' || c == ')' || c == '\\')
+                    pdf_printf("\\%c", c);
+                else if (c < 0x20 || c > 0x7F)
+                    pdf_printf("\\%03o", c);
+                else
+                    pdfout(c);
+            }
+            pdf_puts(")");
+        } else {
+            pdf_puts("<");
+            for (i = 0; i < l; i++) {
+                c = s->getChar(i) & 0xFF;
+                pdf_printf("%.2x", c);
+            }
+            pdf_puts(">");
+        }
+    } else if (obj->isName()) {
+        copyName((char *)obj->getName());
+    } else if (obj->isNull()) {
+        pdf_puts("null");
+    } else if (obj->isArray()) {
+        pdf_puts("[");
+        for (i = 0, l = obj->arrayGetLength(); i < l; ++i) {
+            obj1 = obj->arrayGetNF(i).copy();
+            if (!obj1.isName())
+                pdf_puts(" ");
+            copyObject(&obj1);
+        }
+        pdf_puts("]");
+    } else if (obj->isDict()) {
+        pdf_puts("<<\n");
+        copyDict(obj);
+        pdf_puts(">>");
+    } else if (obj->isStream()) {
+        pdf_puts("<<\n");
+        copyDict(obj->getStream()->getDictObject());
+        pdf_puts(">>\n");
+        pdf_puts("stream\n");
+        copyStream(obj->getStream()->getUndecodedStream());
+        pdf_puts("\nendstream");
+    } else if (obj->isRef()) {
+        ref = obj->getRef();
+        if (ref.num == 0) {
+            pdftex_fail
+                ("PDF inclusion: reference to invalid object"
+                 " (is the included pdf broken?)");
+        } else
+            pdf_printf("%d 0 R", addOther(ref));
+    } else {
+        pdftex_fail("PDF inclusion: type <%s> cannot be copied",
+                    obj->getTypeName());
+    }
+}
+
+static void writeRefs()
+{
+    InObj *r;
+    for (r = inObjList; r != 0; r = r->next) {
+        if (!r->written) {
+            r->written = 1;
+            Object obj1 = xref->fetch(r->ref.num, r->ref.gen);
+            if (r->type == objFont) {
+                assert(!obj1.isStream());
+                pdfbeginobj(r->num, 2);         // \pdfobjcompresslevel = 2 is for this
+                copyFontDict(&obj1, r);
+                pdf_puts("\n");
+                pdfendobj();
+            } else if (r->type != objFontDesc) {        // /FontDescriptor is written via write_fontdescriptor()
+                if (obj1.isStream())
+                    pdfbeginobj(r->num, 0);
+                else
+                    pdfbeginobj(r->num, 2);     // \pdfobjcompresslevel = 2 is for this
+                copyObject(&obj1);
+                pdf_puts("\n");
+                pdfendobj();
+            }
+        }
+    }
+}
+
+static void writeEncodings()
+{
+    UsedEncoding *r, *n;
+    char *glyphNames[256], *s;
+    int i;
+    for (r = encodingList; r != 0; r = r->next) {
+        for (i = 0; i < 256; i++) {
+            if (r->font->isCIDFont()) {
+                pdftex_fail
+                    ("PDF inclusion: CID fonts are not supported"
+                     " (try to disable font replacement to fix this)");
+            }
+            if ((s = (char *)((Gfx8BitFont *) r->font)->getCharName(i)) != 0)
+                glyphNames[i] = s;
+            else
+                glyphNames[i] = notdef;
+        }
+        epdf_write_enc(glyphNames, r->enc_objnum);
+    }
+    for (r = encodingList; r != 0; r = n) {
+        n = r->next;
+#ifdef POPPLER_VERSION
+        r->font->decRefCnt();
+#else
+#error POPPLER_VERSION should be defined.
+#endif
+        delete r;
+    }
+}
+
+// get the pagebox according to the pagebox_spec
+static const PDFRectangle *get_pagebox(Page * page, int pagebox_spec)
+{
+    if (pagebox_spec == pdfboxspecmedia)
+        return page->getMediaBox();
+    else if (pagebox_spec == pdfboxspeccrop)
+        return page->getCropBox();
+    else if (pagebox_spec == pdfboxspecbleed)
+        return page->getBleedBox();
+    else if (pagebox_spec == pdfboxspectrim)
+        return page->getTrimBox();
+    else if (pagebox_spec == pdfboxspecart)
+        return page->getArtBox();
+    else
+        pdftex_fail("PDF inclusion: unknown value of pagebox spec (%i)",
+                    (int) pagebox_spec);
+    return page->getMediaBox(); // to make the compiler happy
+}
+
+
+// Reads various information about the PDF and sets it up for later inclusion.
+// This will fail if the PDF version of the PDF is higher than
+// minor_pdf_version_wanted or page_name is given and can not be found.
+// It makes no sense to give page_name _and_ page_num.
+// Returns the page number.
+
+int
+read_pdf_info(char *image_name, char *page_name, int page_num,
+              int pagebox_spec, int major_pdf_version_wanted, int minor_pdf_version_wanted,
+              int pdf_inclusion_errorlevel)
+{
+    PdfDocument *pdf_doc;
+    Page *page;
+    const PDFRectangle *pagebox;
+#ifdef POPPLER_VERSION
+    int pdf_major_version_found, pdf_minor_version_found;
+#else
+#error POPPLER_VERSION should be defined.
+#endif
+    // initialize
+    if (!isInit) {
+        globalParams = std::make_unique<GlobalParams>();
+        globalParams->setErrQuiet(false);
+        isInit = true;
+    }
+    // open PDF file
+    pdf_doc = find_add_document(image_name);
+    epdf_doc = (void *) pdf_doc;
+
+    // check PDF version
+    // this works only for PDF 1.x -- but since any versions of PDF newer
+    // than 1.x will not be backwards compatible to PDF 1.x, pdfTeX will
+    // then have to changed drastically anyway.
+#ifdef POPPLER_VERSION
+    pdf_major_version_found = pdf_doc->doc->getPDFMajorVersion();
+    pdf_minor_version_found = pdf_doc->doc->getPDFMinorVersion();
+    if ((pdf_major_version_found > major_pdf_version_wanted)
+     || (pdf_minor_version_found > minor_pdf_version_wanted)) {
+        const char *msg =
+            "PDF inclusion: found PDF version <%d.%d>, but at most version <%d.%d> allowed";
+        if (pdf_inclusion_errorlevel > 0) {
+            pdftex_fail(msg, pdf_major_version_found, pdf_minor_version_found, major_pdf_version_wanted, minor_pdf_version_wanted);
+        } else if (pdf_inclusion_errorlevel < 0) {
+            ; /* do nothing */
+        } else { /* = 0, give warning */
+            pdftex_warn(msg, pdf_major_version_found, pdf_minor_version_found, major_pdf_version_wanted, minor_pdf_version_wanted);
+        }
+    }
+#else
+#error POPPLER_VERSION should be defined.
+#endif
+    epdf_num_pages = pdf_doc->doc->getCatalog()->getNumPages();
+    if (page_name) {
+        // get page by name
+        GString name(page_name);
+        std::unique_ptr<LinkDest> link = pdf_doc->doc->findDest(&name);
+        if (link == 0 || !link->isOk())
+            pdftex_fail("PDF inclusion: invalid destination <%s>", page_name);
+        Ref ref = link->getPageRef();
+        page_num = pdf_doc->doc->getCatalog()->findPage(ref);
+        if (page_num == 0)
+            pdftex_fail("PDF inclusion: destination is not a page <%s>",
+                        page_name);
+    } else {
+        // get page by number
+        if (page_num <= 0 || page_num > epdf_num_pages)
+            pdftex_fail("PDF inclusion: required page does not exist <%i>",
+                        epdf_num_pages);
+    }
+    // get the required page
+    page = pdf_doc->doc->getCatalog()->getPage(page_num);
+
+    // get the pagebox (media, crop...) to use.
+    pagebox = get_pagebox(page, pagebox_spec);
+    if (pagebox->x2 > pagebox->x1) {
+        epdf_orig_x = pagebox->x1;
+        epdf_width = pagebox->x2 - pagebox->x1;
+    } else {
+        epdf_orig_x = pagebox->x2;
+        epdf_width = pagebox->x1 - pagebox->x2;
+    }
+    if (pagebox->y2 > pagebox->y1) {
+        epdf_orig_y = pagebox->y1;
+        epdf_height = pagebox->y2 - pagebox->y1;
+    } else {
+        epdf_orig_y = pagebox->y2;
+        epdf_height = pagebox->y1 - pagebox->y2;
+    }
+
+    // get page rotation
+    epdf_rotate = page->getRotate() % 360;
+    if (epdf_rotate < 0)
+        epdf_rotate += 360;
+
+    // page group
+    if (page->getGroup() != NULL)
+        epdf_has_page_group = 1;    // only flag that page group is present;
+                                    // the actual object number will be
+                                    // generated in pdftex.web
+    else
+        epdf_has_page_group = 0;    // no page group present
+
+    pdf_doc->xref = pdf_doc->doc->getXRef();
+    return page_num;
+}
+
+// writes the current epf_doc.
+// Here the included PDF is copied, so most errors that can happen during PDF
+// inclusion will arise here.
+
+void write_epdf(void)
+{
+    Page *page;
+    Ref *pageRef;
+    Dict *pageDict;
+    Object contents, obj1, obj2, pageObj, dictObj;
+    Object groupDict;
+    bool writeSepGroup = false;
+    Object info;
+    char *key;
+    char s[256];
+    int i, l;
+    int rotate;
+    double scale[6] = { 0, 0, 0, 0, 0, 0 };
+    bool writematrix = false;
+    int suppress_ptex_info = getpdfsuppressptexinfo();
+    static const char *pageDictKeys[] = {
+        "LastModified",
+        "Metadata",
+        "PieceInfo",
+        "SeparationInfo",
+//         "Group",
+//         "Resources",
+        NULL
+    };
+
+    PdfDocument *pdf_doc = (PdfDocument *) epdf_doc;
+    (pdf_doc->occurences)--;
+    xref = pdf_doc->xref;
+    inObjList = pdf_doc->inObjList;
+    encodingList = 0;
+    page = pdf_doc->doc->getCatalog()->getPage(epdf_selected_page);
+    pageRef = pdf_doc->doc->getCatalog()->getPageRef(epdf_selected_page);
+    pageObj = xref->fetch(pageRef->num, pageRef->gen);
+    pageDict = pageObj.getDict();
+    rotate = page->getRotate();
+    const PDFRectangle *pagebox;
+    // write the Page header
+    pdf_puts("/Type /XObject\n");
+    pdf_puts("/Subtype /Form\n");
+    pdf_puts("/FormType 1\n");
+
+    // write additional information
+    if ((suppress_ptex_info & MASK_SUPPRESS_PTEX_FILENAME) == 0) {
+        pdf_printf("/%s.FileName (%s)\n", pdfkeyprefix,
+                   convertStringToPDFString(pdf_doc->file_name,
+                                            strlen(pdf_doc->file_name)));
+    }
+    if ((suppress_ptex_info & MASK_SUPPRESS_PTEX_PAGENUMBER) == 0) {
+        pdf_printf("/%s.PageNumber %i\n", pdfkeyprefix, (int) epdf_selected_page);
+    }
+    if ((suppress_ptex_info & MASK_SUPPRESS_PTEX_INFODICT) == 0) {
+        info = pdf_doc->doc->getDocInfoNF().copy();
+        if (info.isRef()) {
+            // the info dict must be indirect (PDF Ref p. 61)
+            pdf_printf("/%s.InfoDict ", pdfkeyprefix);
+            pdf_printf("%d 0 R\n", addOther(info.getRef()));
+        }
+    }
+    // get the pagebox (media, crop...) to use.
+    pagebox = get_pagebox(page, epdf_page_box);
+
+    // handle page rotation
+    if (rotate != 0) {
+        if (rotate % 90 == 0) {
+            // this handles only the simple case: multiple of 90s but these
+            // are the only values allowed according to the reference
+            // (v1.3, p. 78).
+            // the image is rotated around its center.
+            // the /Rotate key is clockwise while the matrix is
+            // counterclockwise :-%
+            tex_printf(", page is rotated %d degrees", rotate);
+            switch (rotate) {
+            case 90:
+                scale[1] = -1;
+                scale[2] = 1;
+                scale[4] = pagebox->x1 - pagebox->y1;
+                scale[5] = pagebox->y1 + pagebox->x2;
+                writematrix = true;
+                break;
+            case 180:
+                scale[0] = scale[3] = -1;
+                scale[4] = pagebox->x1 + pagebox->x2;
+                scale[5] = pagebox->y1 + pagebox->y2;
+                writematrix = true;
+                break;          // width and height are exchanged
+            case 270:
+                scale[1] = 1;
+                scale[2] = -1;
+                scale[4] = pagebox->x1 + pagebox->y2;
+                scale[5] = pagebox->y1 - pagebox->x1;
+                writematrix = true;
+                break;
+            }
+            if (writematrix) {  // The matrix is only written if the image is rotated.
+                sprintf(s, "/Matrix [%.8f %.8f %.8f %.8f %.8f %.8f]\n",
+                        scale[0],
+                        scale[1], scale[2], scale[3], scale[4], scale[5]);
+                pdf_puts(stripzeros(s));
+            }
+        }
+    }
+
+    sprintf(s, "/BBox [%.8f %.8f %.8f %.8f]\n",
+            pagebox->x1, pagebox->y1, pagebox->x2, pagebox->y2);
+    pdf_puts(stripzeros(s));
+
+    // Metadata validity check (as a stream it must be indirect)
+    dictObj = pageDict->lookupNF("Metadata").copy();
+    if (!dictObj.isNull() && !dictObj.isRef())
+        pdftex_warn("PDF inclusion: /Metadata must be indirect object");
+
+    // copy selected items in Page dictionary except Resources & Group
+    for (i = 0; pageDictKeys[i] != NULL; i++) {
+        dictObj = pageDict->lookupNF(pageDictKeys[i]).copy();
+        if (!dictObj.isNull()) {
+            pdf_newline();
+            pdf_printf("/%s ", pageDictKeys[i]);
+            copyObject(&dictObj); // preserves indirection
+        }
+    } 
+
+    // handle page group
+    dictObj = pageDict->lookupNF("Group").copy();
+    if (!dictObj.isNull()) {
+        if (pdfpagegroupval == 0) { 
+            // another pdf with page group was included earlier on the
+            // same page; copy the Group entry as is.  See manual for
+            // info on why this is a warning.
+            if (getpdfsuppresswarningpagegroup() == 0) {
+                pdftex_warn
+    ("PDF inclusion: multiple pdfs with page group included in a single page");
+            }
+            pdf_newline();
+            pdf_puts("/Group ");
+            copyObject(&dictObj);
+        } else {
+            // write Group dict as a separate object, since the Page dict also refers to it
+            dictObj = pageDict->lookup("Group");
+            if (!dictObj.isDict())
+                pdftex_fail("PDF inclusion: /Group dict missing");
+            writeSepGroup = true;
+/*
+This part is only a single line
+            groupDict = Object(page->getGroup());
+in the original patch. In this case, however, pdftex crashes at
+"delete pdf_doc->doc" in "delete_document()" for inclusion of some
+kind of pdf images, for example, figure_missing.pdf in gnuplot.
+A change
+            groupDict = Object(page->getGroup()).copy();
+does not improve the situation.
+The changes below seem to work fine. 
+*/
+// begin modification
+            groupDict = pageDict->lookup("Group");
+            const Dict& dic1 = page->getGroup();
+            const Dict& dic2 = groupDict.getDict();
+            // replace dic2 in groupDict with dic1
+            l = dic2.getLength();
+            for (i = 0; i < l; i++) {
+                groupDict.dictRemove(dic2.getKey(i));
+            }
+            l = dic1.getLength();
+            for (i = 0; i < l; i++) {
+                groupDict.dictAdd((const char *)copyString(dic1.getKey(i)),
+                                  dic1.getValNF(i).copy());
+            }
+// end modification
+            pdf_printf("/Group %ld 0 R\n", (long)pdfpagegroupval);
+        }
+    }
+
+    // write the Resources dictionary
+    if (page->getResourceDict() == NULL) {
+        // Resources can be missing (files without them have been spotted
+        // in the wild); in which case the /Resouces of the /Page will be used.
+        // "This practice is not recommended".
+        pdftex_warn
+            ("PDF inclusion: /Resources missing. 'This practice is not recommended' (PDF Ref)");
+    } else {
+        Object *obj1 = page->getResourceDictObject();
+        if (!obj1->isDict())
+            pdftex_fail("PDF inclusion: invalid resources dict type <%s>",
+                        obj1->getTypeName());
+        pdf_newline();
+        pdf_puts("/Resources <<\n");
+        for (i = 0, l = obj1->dictGetLength(); i < l; ++i) {
+            obj2 = obj1->dictGetVal(i);
+            key = (char *)obj1->dictGetKey(i);
+            if (strcmp("Font", key) == 0)
+                copyFontResources(&obj2);
+            else if (strcmp("ProcSet", key) == 0)
+                copyProcSet(&obj2);
+            else
+                copyOtherResources(&obj2, (char *)key);
+        }
+        pdf_puts(">>\n");
+    }
+
+    // write the page contents
+    contents = page->getContents();
+    if (contents.isStream()) {
+
+        // Variant A: get stream and recompress under control
+        // of \pdfcompresslevel
+        //
+        // pdfbeginstream();
+        // copyStream(contents->getStream());
+        // pdfendstream();
+
+        // Variant B: copy stream without recompressing
+        //
+        obj1 = contents.streamGetDict()->lookup("F");
+        if (!obj1.isNull()) {
+            pdftex_fail("PDF inclusion: Unsupported external stream");
+        }
+        obj1 = contents.streamGetDict()->lookup("Length");
+        assert(!obj1.isNull());
+        pdf_puts("/Length ");
+        copyObject(&obj1);
+        pdf_puts("\n");
+        obj1 = contents.streamGetDict()->lookup("Filter");
+        if (!obj1.isNull()) {
+            pdf_puts("/Filter ");
+            copyObject(&obj1);
+            pdf_puts("\n");
+            obj1 = contents.streamGetDict()->lookup("DecodeParms");
+            if (!obj1.isNull()) {
+                pdf_puts("/DecodeParms ");
+                copyObject(&obj1);
+                pdf_puts("\n");
+            }
+        }
+        pdf_puts(">>\nstream\n");
+        copyStream(contents.getStream()->getUndecodedStream());
+        pdfendstream();
+    } else if (contents.isArray()) {
+        pdfbeginstream();
+        for (i = 0, l = contents.arrayGetLength(); i < l; ++i) {
+            Object contentsobj = contents.arrayGet(i);
+            copyStream(contentsobj.getStream());
+            if (i < l - 1)
+                pdf_newline();  // add a newline after each stream except the last
+        }
+        pdfendstream();
+    } else {                    // the contents are optional, but we need to include an empty stream
+        pdfbeginstream();
+        pdfendstream();
+    }
+
+    // write out all indirect objects
+    writeRefs();
+
+    // write out all used encodings (and delete list)
+    writeEncodings();
+
+    // write the Group dict if needed
+    if (writeSepGroup) {
+        pdfbeginobj(pdfpagegroupval, 2);
+        copyObject(&groupDict);
+        pdf_puts("\n");
+        pdfendobj();
+        pdfpagegroupval = 0;    // only the 1st included pdf on a page gets its
+                                // Group included in the Page dict
+    }
+
+    // save object list, xref
+    pdf_doc->inObjList = inObjList;
+    pdf_doc->xref = xref;
+}
+
+// Called when an image has been written and it's resources in image_tab are
+// freed and it's not referenced anymore.
+
+void epdf_delete()
+{
+    PdfDocument *pdf_doc = (PdfDocument *) epdf_doc;
+    xref = pdf_doc->xref;
+    if (pdf_doc->occurences < 0) {
+        delete_document(pdf_doc);
+    }
+}
+
+// Called when PDF embedding system is finalized.
+// Now deallocate all remaining PdfDocuments.
+
+void epdf_check_mem()
+{
+    if (isInit) {
+        PdfDocument *p, *n;
+        for (p = pdfDocuments; p; p = n) {
+            n = p->next;
+            delete_document(p);
+        }
+    }
+}