1111 lines
36 KiB
C++
1111 lines
36 KiB
C++
/*
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Copyright 1996-2017 Han The Thanh, <thanh@pdftex.org>
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This file is part of pdfTeX.
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pdfTeX is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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pdfTeX is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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This is based on the patch texlive-poppler-0.59.patch <2017-09-19> at
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https://git.archlinux.org/svntogit/packages.git/plain/texlive-bin/trunk
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by Arch Linux. A little modifications are made to avoid a crash for
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some kind of pdf images, such as figure_missing.pdf in gnuplot.
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The poppler should be 0.86.0 or newer versions.
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POPPLER_VERSION should be defined.
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*/
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/* Do this early in order to avoid a conflict between
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MINGW32 <rpcndr.h> defining 'boolean' as 'unsigned char' and
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<kpathsea/types.h> defining Pascal's boolean as 'int'.
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*/
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#include <w2c/config.h>
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#include <kpathsea/lib.h>
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#include <stdlib.h>
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#include <math.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#ifdef POPPLER_VERSION
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#include <dirent.h>
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#include <poppler-config.h>
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#include <goo/GooString.h>
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#include <goo/gmem.h>
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#include <goo/gfile.h>
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#define GString GooString
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#else
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#error POPPLER_VERSION should be defined.
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#endif
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#include <assert.h>
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#include "Object.h"
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#include "Stream.h"
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#include "Array.h"
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#include "Dict.h"
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#include "XRef.h"
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#include "Catalog.h"
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#include "Link.h"
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#include "Page.h"
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#include "GfxFont.h"
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#include "PDFDoc.h"
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#include "GlobalParams.h"
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#include "Error.h"
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// This file is mostly C and not very much C++; it's just used to interface
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// the functions of xpdf, which are written in C++.
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extern "C" {
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#include <pdftexdir/ptexmac.h>
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#include <pdftexdir/pdftex-common.h>
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// These functions from pdftex.web gets declared in pdftexcoerce.h in the
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// usual web2c way, but we cannot include that file here because C++
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// does not allow it.
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extern int getpdfsuppresswarningpagegroup(void);
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extern integer getpdfsuppressptexinfo(void);
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extern integer zround(double);
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}
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// The prefix "PTEX" for the PDF keys is special to pdfTeX;
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// this has been registered with Adobe by Hans Hagen.
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#define pdfkeyprefix "PTEX"
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#define MASK_SUPPRESS_PTEX_FULLBANNER 0x01
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#define MASK_SUPPRESS_PTEX_FILENAME 0x02
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#define MASK_SUPPRESS_PTEX_PAGENUMBER 0x04
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#define MASK_SUPPRESS_PTEX_INFODICT 0x08
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// When copying the Resources of the selected page, all objects are copied
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// recusively top-down. Indirect objects however are not fetched during
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// copying, but get a new object number from pdfTeX and then will be
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// appended into a linked list. Duplicates are checked and removed from the
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// list of indirect objects during appending.
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enum InObjType {
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objFont,
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objFontDesc,
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objOther
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};
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struct InObj {
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Ref ref; // ref in original PDF
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InObjType type; // object type
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InObj *next; // next entry in list of indirect objects
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int num; // new object number in output PDF
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fd_entry *fd; // pointer to /FontDescriptor object structure
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int enc_objnum; // Encoding for objFont
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int written; // has it been written to output PDF?
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};
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struct UsedEncoding {
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int enc_objnum;
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GfxFont *font;
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UsedEncoding *next;
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};
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static InObj *inObjList;
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static UsedEncoding *encodingList;
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static bool isInit = false;
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// --------------------------------------------------------------------
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// Maintain list of open embedded PDF files
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// --------------------------------------------------------------------
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struct PdfDocument {
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char *file_name;
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PDFDoc *doc;
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XRef *xref;
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InObj *inObjList;
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int occurences; // number of references to the document; the doc can be
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// deleted when this is negative
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PdfDocument *next;
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};
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static PdfDocument *pdfDocuments = 0;
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static XRef *xref = 0;
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// Returns pointer to PdfDocument record for PDF file.
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// Creates a new record if it doesn't exist yet.
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// xref is made current for the document.
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static PdfDocument *find_add_document(char *file_name)
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{
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PdfDocument *p = pdfDocuments;
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while (p && strcmp(p->file_name, file_name) != 0)
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p = p->next;
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if (p) {
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xref = p->xref;
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(p->occurences)++;
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return p;
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}
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p = new PdfDocument;
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p->file_name = xstrdup(file_name);
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p->xref = xref = 0;
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p->occurences = 0;
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GString *docName = new GString(p->file_name);
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p->doc = new PDFDoc(docName); // takes ownership of docName
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if (!p->doc->isOk() || !p->doc->okToPrint()) {
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pdftex_fail("xpdf: reading PDF image failed");
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}
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p->inObjList = 0;
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p->next = pdfDocuments;
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pdfDocuments = p;
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return p;
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}
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// Deallocate a PdfDocument with all its resources
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static void delete_document(PdfDocument * pdf_doc)
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{
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PdfDocument **p = &pdfDocuments;
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while (*p && *p != pdf_doc)
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p = &((*p)->next);
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// should not happen:
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if (!*p)
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return;
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// unlink from list
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*p = pdf_doc->next;
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// free pdf_doc's resources
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InObj *r, *n;
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for (r = pdf_doc->inObjList; r != 0; r = n) {
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n = r->next;
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delete r;
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}
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xref = pdf_doc->xref;
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delete pdf_doc->doc;
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xfree(pdf_doc->file_name);
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delete pdf_doc;
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}
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// --------------------------------------------------------------------
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static int addEncoding(GfxFont * gfont)
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{
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UsedEncoding *n;
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n = new UsedEncoding;
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n->next = encodingList;
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encodingList = n;
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n->font = gfont;
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n->enc_objnum = pdfnewobjnum();
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return n->enc_objnum;
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}
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#define addFont(ref, fd, enc_objnum) \
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addInObj(objFont, ref, fd, enc_objnum)
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// addFontDesc is only used to avoid writing the original FontDescriptor
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// from the PDF file.
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#define addFontDesc(ref, fd) \
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addInObj(objFontDesc, ref, fd, 0)
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#define addOther(ref) \
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addInObj(objOther, ref, 0, 0)
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static int addInObj(InObjType type, Ref ref, fd_entry * fd, int e)
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{
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InObj *p, *q, *n = new InObj;
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if (ref.num == 0)
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pdftex_fail("PDF inclusion: invalid reference");
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n->ref = ref;
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n->type = type;
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n->next = 0;
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n->fd = fd;
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n->enc_objnum = e;
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n->written = 0;
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if (inObjList == 0)
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inObjList = n;
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else {
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for (p = inObjList; p != 0; p = p->next) {
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if (p->ref.num == ref.num && p->ref.gen == ref.gen) {
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delete n;
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return p->num;
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}
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q = p;
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}
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// it is important to add new objects at the end of the list,
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// because new objects are being added while the list is being
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// written out.
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q->next = n;
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}
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if (type == objFontDesc)
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n->num = get_fd_objnum(fd);
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else
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n->num = pdfnewobjnum();
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return n->num;
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}
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#if 0 /* unusewd */
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static int getNewObjectNumber(Ref ref)
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{
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InObj *p;
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if (inObjList == 0) {
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pdftex_fail("No objects copied yet");
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} else {
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for (p = inObjList; p != 0; p = p->next) {
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if (p->ref.num == ref.num && p->ref.gen == ref.gen) {
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return p->num;
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}
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}
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pdftex_fail("Object not yet copied: %i %i", ref.num, ref.gen);
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}
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#ifdef _MSC_VER
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/* Never reached, but without __attribute__((noreturn)) for pdftex_fail()
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MSVC 5.0 requires an int return value. */
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return -60000;
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#endif
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}
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#endif
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static void copyObject(Object *);
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static void copyName(char *s)
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{
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pdf_puts("/");
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for (; *s != 0; s++) {
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if (isdigit(*s) || isupper(*s) || islower(*s) || *s == '_' ||
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*s == '.' || *s == '-' || *s == '+')
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pdfout(*s);
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else
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pdf_printf("#%.2X", *s & 0xFF);
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}
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}
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static void copyDictEntry(Object * obj, int i)
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{
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Object obj1;
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copyName((char *)obj->dictGetKey(i));
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pdf_puts(" ");
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obj1 = obj->dictGetValNF(i).copy();
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copyObject(&obj1);
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pdf_puts("\n");
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}
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static void copyDict(Object * obj)
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{
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int i, l;
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if (!obj->isDict())
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pdftex_fail("PDF inclusion: invalid dict type <%s>",
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obj->getTypeName());
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for (i = 0, l = obj->dictGetLength(); i < l; ++i)
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copyDictEntry(obj, i);
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}
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static void copyFontDict(Object * obj, InObj * r)
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{
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int i, l;
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char *key;
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if (!obj->isDict())
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pdftex_fail("PDF inclusion: invalid dict type <%s>",
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obj->getTypeName());
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pdf_puts("<<\n");
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assert(r->type == objFont); // FontDescriptor is in fd_tree
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for (i = 0, l = obj->dictGetLength(); i < l; ++i) {
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key = (char *)obj->dictGetKey(i);
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if (strncmp("FontDescriptor", key, strlen("FontDescriptor")) == 0
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|| strncmp("BaseFont", key, strlen("BaseFont")) == 0
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|| strncmp("Encoding", key, strlen("Encoding")) == 0)
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continue; // skip original values
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copyDictEntry(obj, i);
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}
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// write new FontDescriptor, BaseFont, and Encoding
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pdf_printf("/FontDescriptor %d 0 R\n", get_fd_objnum(r->fd));
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pdf_printf("/BaseFont %d 0 R\n", get_fn_objnum(r->fd));
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pdf_printf("/Encoding %d 0 R\n", r->enc_objnum);
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pdf_puts(">>");
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}
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static void copyStream(Stream * str)
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{
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int c, c2 = 0;
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str->reset();
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while ((c = str->getChar()) != EOF) {
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pdfout(c);
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c2 = c;
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}
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pdflastbyte = c2;
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}
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static void copyProcSet(Object * obj)
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{
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int i, l;
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Object procset;
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if (!obj->isArray())
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pdftex_fail("PDF inclusion: invalid ProcSet array type <%s>",
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obj->getTypeName());
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pdf_puts("/ProcSet [ ");
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for (i = 0, l = obj->arrayGetLength(); i < l; ++i) {
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procset = obj->arrayGetNF(i).copy();
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if (!procset.isName())
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pdftex_fail("PDF inclusion: invalid ProcSet entry type <%s>",
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procset.getTypeName());
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copyName((char *)procset.getName());
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pdf_puts(" ");
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}
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pdf_puts("]\n");
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}
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#define REPLACE_TYPE1C true
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static bool embeddableFont(Object * fontdesc)
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{
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Object fontfile, ffsubtype;
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if (!fontdesc->isDict())
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return false;
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fontfile = fontdesc->dictLookup("FontFile");
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if (fontfile.isStream())
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return true;
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if (REPLACE_TYPE1C) {
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fontfile = fontdesc->dictLookup("FontFile3");
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if (!fontfile.isStream())
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return false;
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ffsubtype = fontfile.streamGetDict()->lookup("Subtype");
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return ffsubtype.isName() && !strcmp(ffsubtype.getName(), "Type1C");
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}
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return false;
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}
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static void copyFont(char *tag, Object * fontRef)
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{
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Object fontdict, subtype, basefont, fontdescRef, fontdesc, charset,
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stemV;
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GfxFont *gfont;
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fd_entry *fd;
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fm_entry *fontmap;
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// Check whether the font has already been embedded before analysing it.
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InObj *p;
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Ref ref = fontRef->getRef();
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for (p = inObjList; p; p = p->next) {
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if (p->ref.num == ref.num && p->ref.gen == ref.gen) {
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copyName(tag);
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pdf_printf(" %d 0 R ", p->num);
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return;
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}
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}
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// Only handle included Type1 (and Type1C) fonts; anything else will be copied.
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// Type1C fonts are replaced by Type1 fonts, if REPLACE_TYPE1C is true.
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fontdict = fontRef->fetch(xref);
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fontdesc = Object(objNull);
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if (fontdict.isDict()) {
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subtype = fontdict.dictLookup("Subtype");
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basefont = fontdict.dictLookup("BaseFont");
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fontdescRef = fontdict.dictLookupNF("FontDescriptor").copy();
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if (fontdescRef.isRef()) {
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fontdesc = fontdescRef.fetch(xref);
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}
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}
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if (!fixedinclusioncopyfont && fontdict.isDict()
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&& subtype.isName()
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&& !strcmp(subtype.getName(), "Type1")
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&& basefont.isName()
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&& fontdescRef.isRef()
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&& fontdesc.isDict()
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&& embeddableFont(&fontdesc)
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&& (fontmap = lookup_fontmap((char *)basefont.getName())) != NULL) {
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// round /StemV value, since the PDF input is a float
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// (see Font Descriptors in PDF reference), but we only store an
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// integer, since we don't want to change the struct.
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stemV = fontdesc.dictLookup("StemV");
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fd = epdf_create_fontdescriptor(fontmap, zround(stemV.getNum()));
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charset = fontdesc.dictLookup("CharSet");
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if (!charset.isNull() &&
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charset.isString() && is_subsetable(fontmap))
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epdf_mark_glyphs(fd, (char *)charset.getString()->c_str());
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else
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embed_whole_font(fd);
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addFontDesc(fontdescRef.getRef(), fd);
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copyName(tag);
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gfont = GfxFont::makeFont(xref, tag, fontRef->getRef(),
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fontdict.getDict());
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pdf_printf(" %d 0 R ", addFont(fontRef->getRef(), fd,
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addEncoding(gfont)));
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} else {
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copyName(tag);
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pdf_puts(" ");
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copyObject(fontRef);
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}
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}
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static void copyFontResources(Object * obj)
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{
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Object fontRef;
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int i, l;
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if (!obj->isDict())
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pdftex_fail("PDF inclusion: invalid font resources dict type <%s>",
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obj->getTypeName());
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pdf_puts("/Font << ");
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for (i = 0, l = obj->dictGetLength(); i < l; ++i) {
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fontRef = obj->dictGetValNF(i).copy();
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if (fontRef.isRef())
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copyFont((char *)obj->dictGetKey(i), &fontRef);
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else if (fontRef.isDict()) { // some programs generate pdf with embedded font object
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copyName((char *)obj->dictGetKey(i));
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pdf_puts(" ");
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copyObject(&fontRef);
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}
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else
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pdftex_fail("PDF inclusion: invalid font in reference type <%s>",
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fontRef.getTypeName());
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}
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pdf_puts(">>\n");
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}
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static void copyOtherResources(Object * obj, char *key)
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{
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// copies all other resources (write_epdf handles Fonts and ProcSets),
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// if Subtype is present, it must be a name
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if (strcmp("Subtype", key) == 0) {
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if (!obj->isName()) {
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pdftex_warn("PDF inclusion: Subtype in Resources dict is not a name"
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" (key '%s', type <%s>); ignored.",
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key, obj->getTypeName());
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return;
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}
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} else if (!obj->isDict()) {
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//FIXME: Write the message only to the log file
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pdftex_warn("PDF inclusion: invalid other resource which is no dict"
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" (key '%s', type <%s>); ignored.",
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key, obj->getTypeName());
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return;
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}
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copyName(key);
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pdf_puts(" ");
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copyObject(obj);
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}
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// Function onverts double to string; very small and very large numbers
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// are NOT converted to scientific notation.
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// n must be a number or real conforming to the implementation limits
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// of PDF as specified in appendix C.1 of the PDF Ref.
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// These are:
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// maximum value of ints is +2^32
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// maximum value of reals is +2^15
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// smalles values of reals is 1/(2^16)
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static char *convertNumToPDF(double n)
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{
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static const int precision = 6;
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static const int fact = (int) 1E6; // must be 10^precision
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static const double epsilon = 0.5E-6; // 2epsilon must be 10^-precision
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static char buf[64];
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// handle very small values: return 0
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if (fabs(n) < epsilon) {
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buf[0] = '0';
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buf[1] = '\0';
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} else {
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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::unique_ptr<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 > 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);
|
|
}
|
|
}
|
|
}
|