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texlive/source-poppler0.59.0.patch

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Older poppler support OBS-URL: https://build.opensuse.org/package/show/Publishing:TeXLive/texlive?expand=0&rev=316
2019-05-14 13:18:44 +02:00
---
texk/web2c/pdftexdir/pdftoepdf-poppler0.59.0.cc | 1113 ++++++++++++++++++++++++
1 file changed, 1113 insertions(+)
--- texk/web2c/pdftexdir/pdftoepdf-poppler0.59.0.cc
+++ texk/web2c/pdftexdir/pdftoepdf-poppler0.59.0.cc 2019-05-14 09:08:36.877504732 +0000
@@ -0,0 +1,1113 @@
+/*
+Copyright 1996-2016 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 0.59.0 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(const 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(const Object * obj, int i)
+{
+ Object obj1;
+ copyName(obj->dictGetKey(i));
+ pdf_puts(" ");
+ obj1 = obj->dictGetValNF(i);
+ copyObject(&obj1);
+ pdf_puts("\n");
+}
+
+static void copyDict(const 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(const Object * obj, InObj * r)
+{
+ int i, l;
+ const 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 = 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);
+ if (!procset.isName())
+ pdftex_fail("PDF inclusion: invalid ProcSet entry type <%s>",
+ procset.getTypeName());
+ copyName(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(const 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");
+ 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(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, charset.getString()->getCString());
+ 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);
+ if (fontRef.isRef())
+ copyFont(obj->dictGetKey(i), &fontRef);
+ else if (fontRef.isDict()) { // some programs generate pdf with embedded font object
+ copyName(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, const 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;
+ const char *p;
+ const 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 = obj->getString();
+ p = s->getCString();
+ 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(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);
+ 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;
+ const 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 = ((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 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 = new 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 > 1)
+ || (pdf_minor_version_found > minor_pdf_version_wanted)) {
+ const char *msg =
+ "PDF inclusion: found PDF version <%d.%d>, but at most version <1.%d> allowed";
+ if (pdf_inclusion_errorlevel > 0) {
+ pdftex_fail(msg, pdf_major_version_found, pdf_minor_version_found, 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, 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);
+ 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.num, ref.gen);
+ if (page_num == 0)
+ pdftex_fail("PDF inclusion: destination is not a page <%s>",
+ page_name);
+ delete link;
+ } 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;
+ const 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();
+ 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");
+ 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]);
+ if (!dictObj.isNull()) {
+ pdf_newline();
+ pdf_printf("/%s ", pageDictKeys[i]);
+ copyObject(&dictObj); // preserves indirection
+ }
+ }
+
+ // handle page group
+ dictObj = pageDict->lookupNF("Group");
+ 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(copyString(dic1.getKey(i)),
+ dic1.getValNF(i));
+ }
+// 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 = obj1->dictGetKey(i);
+ if (strcmp("Font", key) == 0)
+ copyFontResources(&obj2);
+ else if (strcmp("ProcSet", key) == 0)
+ copyProcSet(&obj2);
+ else
+ copyOtherResources(&obj2, 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);
+ }
+ // see above for globalParams
+ delete globalParams;
+ }
+}
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