blob: c36a2d28cfc199c78ff1149ee92efa93fcc22b90 [file] [log] [blame]
//========================================================================
//
// FontInfo.cc
//
// Copyright (C) 2005, 2006 Kristian Høgsberg <krh@redhat.com>
// Copyright (C) 2005-2008, 2010, 2017-2019 Albert Astals Cid <aacid@kde.org>
// Copyright (C) 2005 Brad Hards <bradh@frogmouth.net>
// Copyright (C) 2006 Kouhei Sutou <kou@cozmixng.org>
// Copyright (C) 2009 Pino Toscano <pino@kde.org>
// Copyright (C) 2010 Hib Eris <hib@hiberis.nl>
// Copyright (C) 2010, 2012 Adrian Johnson <ajohnson@redneon.com>
// Copyright (C) 2010, 2013 Thomas Freitag <Thomas.Freitag@alfa.de>
// Copyright (C) 2011 Carlos Garcia Campos <carlosgc@gnome.org>
// Copyright (C) 2012 Fabio D'Urso <fabiodurso@hotmail.it>
// Copyright (C) 2018 Klarälvdalens Datakonsult AB, a KDAB Group company, <info@kdab.com>. Work sponsored by the LiMux project of the city of Munich
// Copyright (C) 2018, 2019 Adam Reichold <adam.reichold@t-online.de>
// Copyright (C) 2019 Oliver Sander <oliver.sander@tu-dresden.de>
//
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
//
//========================================================================
//========================================================================
//
// Based on code from pdffonts.cc
//
// Copyright 2001-2007 Glyph & Cog, LLC
//
//========================================================================
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <math.h>
#include "GlobalParams.h"
#include "Error.h"
#include "Object.h"
#include "Dict.h"
#include "GfxFont.h"
#include "Annot.h"
#include "PDFDoc.h"
#include "FontInfo.h"
FontInfoScanner::FontInfoScanner(PDFDoc *docA, int firstPage) {
doc = docA;
currentPage = firstPage + 1;
}
FontInfoScanner::~FontInfoScanner() {
}
std::vector<FontInfo*> *FontInfoScanner::scan(int nPages) {
Page *page;
Dict *resDict;
Annots *annots;
int lastPage;
if (currentPage > doc->getNumPages()) {
return nullptr;
}
auto result = new std::vector<FontInfo*>();
lastPage = currentPage + nPages;
if (lastPage > doc->getNumPages() + 1) {
lastPage = doc->getNumPages() + 1;
}
XRef *xrefA = doc->getXRef()->copy();
for (int pg = currentPage; pg < lastPage; ++pg) {
page = doc->getPage(pg);
if (!page) continue;
if ((resDict = page->getResourceDictCopy(xrefA))) {
scanFonts(xrefA, resDict, result);
delete resDict;
}
annots = page->getAnnots();
for (int i = 0; i < annots->getNumAnnots(); ++i) {
Object obj1 = annots->getAnnot(i)->getAppearanceResDict();
if (obj1.isDict()) {
scanFonts(xrefA, obj1.getDict(), result);
}
}
}
currentPage = lastPage;
delete xrefA;
return result;
}
void FontInfoScanner::scanFonts(XRef *xrefA, Dict *resDict, std::vector<FontInfo*> *fontsList) {
GfxFontDict *gfxFontDict;
GfxFont *font;
// scan the fonts in this resource dictionary
gfxFontDict = nullptr;
const Object &fontObj = resDict->lookupNF("Font");
if (fontObj.isRef()) {
Object obj2 = fontObj.fetch(xrefA);
if (obj2.isDict()) {
Ref r = fontObj.getRef();
gfxFontDict = new GfxFontDict(xrefA, &r, obj2.getDict());
}
} else if (fontObj.isDict()) {
gfxFontDict = new GfxFontDict(xrefA, nullptr, fontObj.getDict());
}
if (gfxFontDict) {
for (int i = 0; i < gfxFontDict->getNumFonts(); ++i) {
if ((font = gfxFontDict->getFont(i))) {
Ref fontRef = *font->getID();
// add this font to the list if not already found
if (fonts.insert(fontRef.num).second) {
fontsList->push_back(new FontInfo(font, xrefA));
}
}
}
delete gfxFontDict;
}
// recursively scan any resource dictionaries in objects in this
// resource dictionary
const char *resTypes[] = { "XObject", "Pattern" };
for (unsigned int resType = 0; resType < sizeof(resTypes) / sizeof(resTypes[0]); ++resType) {
Object objDict = resDict->lookup(resTypes[resType]);
if (objDict.isDict()) {
for (int i = 0; i < objDict.dictGetLength(); ++i) {
Ref obj2Ref;
const Object obj2 = objDict.getDict()->getVal(i, &obj2Ref);
if (obj2Ref != Ref::INVALID()) {
// check for an already-seen object
if (!visitedObjects.insert(obj2Ref.num).second) {
continue;
}
}
if (obj2.isStream()) {
Ref resourcesRef;
const Object resObj = obj2.streamGetDict()->lookup("Resources", &resourcesRef);
if (resourcesRef != Ref::INVALID()) {
if (!visitedObjects.insert(resourcesRef.num).second) {
continue;
}
}
if (resObj.isDict() && resObj.getDict() != resDict) {
scanFonts(xrefA, resObj.getDict(), fontsList);
}
}
}
}
}
}
FontInfo::FontInfo(GfxFont *font, XRef *xref) {
const GooString *origName;
fontRef = *font->getID();
// font name
origName = font->getName();
if (origName != nullptr) {
name = font->getName()->copy();
} else {
name = nullptr;
}
// font type
type = (FontInfo::Type)font->getType();
// check for an embedded font
if (font->getType() == fontType3) {
emb = true;
} else {
emb = font->getEmbeddedFontID(&embRef);
}
file = nullptr;
substituteName = nullptr;
if (!emb)
{
SysFontType dummy;
int dummy2;
GooString substituteNameAux;
file = globalParams->findSystemFontFile(font, &dummy, &dummy2, &substituteNameAux);
if (substituteNameAux.getLength() > 0)
substituteName = substituteNameAux.copy();
}
encoding = font->getEncodingName()->copy();
// look for a ToUnicode map
hasToUnicode = false;
Object fontObj = xref->fetch(fontRef);
if (fontObj.isDict()) {
hasToUnicode = fontObj.dictLookup("ToUnicode").isStream();
}
// check for a font subset name: capital letters followed by a '+'
// sign
subset = false;
if (name) {
int i;
for (i = 0; i < name->getLength(); ++i) {
if (name->getChar(i) < 'A' || name->getChar(i) > 'Z') {
break;
}
}
subset = i > 0 && i < name->getLength() && name->getChar(i) == '+';
}
}
FontInfo::FontInfo(FontInfo& f) {
name = f.name ? f.name->copy() : nullptr;
file = f.file ? f.file->copy() : nullptr;
encoding = f.encoding ? f.encoding->copy() : nullptr;
substituteName = f.substituteName ? f.substituteName->copy() : nullptr;
type = f.type;
emb = f.emb;
subset = f.subset;
hasToUnicode = f.hasToUnicode;
fontRef = f.fontRef;
embRef = f.embRef;
}
FontInfo::~FontInfo() {
delete name;
delete file;
delete encoding;
if (substituteName)
delete substituteName;
}