/* Copyright 1996-2016 Han The Thanh, 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 . */ /* Do this early in order to avoid a conflict between MINGW32 defining 'boolean' as 'unsigned char' and defining Pascal's boolean as 'int'. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #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 #include // 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 // PdfObject encapsulates the xpdf Object type, // and properly frees its resources on destruction. // Use obj-> to access members of the Object, // and &obj to get a pointer to the object. // It is no longer necessary to call Object::free explicitely. class PdfObject { public: PdfObject() { // nothing } ~PdfObject() { iObject.free(); } Object *operator->() { return &iObject; } Object *operator&() { return &iObject; } private: // no copying or assigning PdfObject(const PdfObject &); void operator=(const PdfObject &); public: Object iObject; }; // 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 GBool isInit = gFalse; // -------------------------------------------------------------------- // 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; } // Replacement for // Object *initDict(Dict *dict1){ initObj(objDict); dict = dict1; return this; } static void initDictFromDict(PdfObject & obj, Dict * dict) { obj->initDict(xref); for (int i = 0, l = dict->getLength(); i < l; i++) { Object obj1; obj->dictAdd(copyString(dict->getKey(i)), dict->getValNF(i, &obj1)); } } // -------------------------------------------------------------------- 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) { PdfObject obj1; copyName(obj->dictGetKey(i)); pdf_puts(" "); obj->dictGetValNF(i, &obj1); 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 = 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; PdfObject 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) { obj->arrayGetNF(i, &procset); 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 void copyFont(char *tag, Object * fontRef) { PdfObject fontdict, subtype, basefont, fontdescRef, fontdesc, charset, fontfile, ffsubtype, 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. if (!fixedinclusioncopyfont && fontRef->fetch(xref, &fontdict)->isDict() && fontdict->dictLookup("Subtype", &subtype)->isName() && !strcmp(subtype->getName(), "Type1") && fontdict->dictLookup("BaseFont", &basefont)->isName() && fontdict->dictLookupNF("FontDescriptor", &fontdescRef)->isRef() && fontdescRef->fetch(xref, &fontdesc)->isDict() && (fontdesc->dictLookup("FontFile", &fontfile)->isStream() || (REPLACE_TYPE1C && fontdesc->dictLookup("FontFile3", &fontfile)->isStream() && fontfile->streamGetDict()->lookup("Subtype", &ffsubtype)->isName() && !strcmp(ffsubtype->getName(), "Type1C"))) && (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. fontdesc->dictLookup("StemV", &stemV); fd = epdf_create_fontdescriptor(fontmap, zround(stemV->getNum())); if (fontdesc->dictLookup("CharSet", &charset) && 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) { PdfObject 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) { obj->dictGetValNF(i, &fontRef); 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, 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) { PdfObject 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 = 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) { obj->arrayGetNF(i, &obj1); if (!obj1->isName()) pdf_puts(" "); copyObject(&obj1); } pdf_puts("]"); } else if (obj->isDict()) { pdf_puts("<<\n"); copyDict(obj); pdf_puts(">>"); } else if (obj->isStream()) { initDictFromDict(obj1, obj->streamGetDict()); pdf_puts("<<\n"); copyDict(&obj1); 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) { Object obj1; r->written = 1; xref->fetch(r->ref.num, r->ref.gen, &obj1); 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(); } obj1.free(); } } } 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 = ((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; delete r->font; delete r; } } // get the pagebox according to the pagebox_spec static 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; PDFRectangle *pagebox; float pdf_version_found, pdf_version_wanted; // initialize if (!isInit) { globalParams = new GlobalParams(); globalParams->setErrQuiet(gFalse); isInit = gTrue; } // 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. pdf_version_found = pdf_doc->doc->getPDFVersion(); pdf_version_wanted = major_pdf_version_wanted + (minor_pdf_version_wanted * 0.1); if (pdf_version_found > pdf_version_wanted + 0.01) { char msg[] = "PDF inclusion: found PDF version <%.1f>, but at most version <%.1f> allowed"; if (pdf_inclusion_errorlevel > 0) { pdftex_fail(msg, pdf_version_found, pdf_version_wanted); } else if (pdf_inclusion_errorlevel < 0) { ; /* do nothing */ } else { /* = 0, give warning */ pdftex_warn(msg, pdf_version_found, pdf_version_wanted); } } 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; PdfObject contents, obj1, obj2, pageObj, dictObj; PdfObject 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); xref->fetch(pageRef->num, pageRef->gen, &pageObj); pageDict = pageObj->getDict(); rotate = page->getRotate(); 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) { pdf_doc->doc->getDocInfoNF(&info); 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) pageDict->lookupNF("Metadata", &dictObj); 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++) { pageDict->lookupNF(pageDictKeys[i], &dictObj); if (!dictObj->isNull()) { pdf_newline(); pdf_printf("/%s ", pageDictKeys[i]); copyObject(&dictObj); // preserves indirection } } // handle page group pageDict->lookupNF("Group", &dictObj); 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 pageDict->lookup("Group", &dictObj); if (!dictObj->isDict()) pdftex_fail("PDF inclusion: /Group dict missing"); writeSepGroup = true; initDictFromDict(groupDict, page->getGroup()); 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 { initDictFromDict(obj1, page->getResourceDict()); 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) { obj1->dictGetVal(i, &obj2); 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 page->getContents(&contents); if (contents->isStream()) { // Variant A: get stream and recompress under control // of \pdfcompresslevel // // pdfbeginstream(); // copyStream(contents->getStream()); // pdfendstream(); // Variant B: copy stream without recompressing // contents->streamGetDict()->lookup("F", &obj1); if (!obj1->isNull()) { pdftex_fail("PDF inclusion: Unsupported external stream"); } contents->streamGetDict()->lookup("Length", &obj1); assert(!obj1->isNull()); pdf_puts("/Length "); copyObject(&obj1); pdf_puts("\n"); contents->streamGetDict()->lookup("Filter", &obj1); if (!obj1->isNull()) { pdf_puts("/Filter "); copyObject(&obj1); pdf_puts("\n"); contents->streamGetDict()->lookup("DecodeParms", &obj1); 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; copyStream((contents->arrayGet(i, &contentsobj))->getStream()); contentsobj.free(); 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; } }