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//========================================================================
//
// FontInfo.cc
//
// Copyright (C) 2005, 2006 Kristian Høgsberg <krh@redhat.com>
// Copyright (C) 2005-2008, 2010 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 Adrian Johnson <ajohnson@redneon.com>
// Copyright (C) 2010 Thomas Freitag <Thomas.Freitag@alfa.de>
// Copyright (C) 2011 Carlos Garcia Campos <carlosgc@gnome.org>
//
// 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() {
}
GooList *FontInfoScanner::scan(int nPages) {
GooList *result;
Page *page;
Dict *resDict;
Annots *annots;
Object obj1, obj2;
int lastPage;
if (currentPage > doc->getNumPages()) {
return NULL;
}
result = new GooList();
lastPage = currentPage + nPages;
if (lastPage > doc->getNumPages() + 1) {
lastPage = doc->getNumPages() + 1;
}
for (int pg = currentPage; pg < lastPage; ++pg) {
page = doc->getPage(pg);
if (!page) continue;
if ((resDict = page->getResourceDict())) {
scanFonts(resDict, result);
}
annots = page->getAnnots(doc->getCatalog());
for (int i = 0; i < annots->getNumAnnots(); ++i) {
if (annots->getAnnot(i)->getAppearance(&obj1)->isStream()) {
obj1.streamGetDict()->lookup("Resources", &obj2);
if (obj2.isDict()) {
scanFonts(obj2.getDict(), result);
}
obj2.free();
}
obj1.free();
}
}
currentPage = lastPage;
return result;
}
void FontInfoScanner::scanFonts(Dict *resDict, GooList *fontsList) {
Object obj1, obj2, objDict, resObj;
Ref r;
GfxFontDict *gfxFontDict;
GfxFont *font;
int i;
// scan the fonts in this resource dictionary
gfxFontDict = NULL;
resDict->lookupNF("Font", &obj1);
if (obj1.isRef()) {
obj1.fetch(doc->getXRef(), &obj2);
if (obj2.isDict()) {
r = obj1.getRef();
gfxFontDict = new GfxFontDict(doc->getXRef(), &r, obj2.getDict());
}
obj2.free();
} else if (obj1.isDict()) {
gfxFontDict = new GfxFontDict(doc->getXRef(), NULL, obj1.getDict());
}
if (gfxFontDict) {
for (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.find(fontRef.num) == fonts.end()) {
fontsList->append(new FontInfo(font, doc));
fonts.insert(fontRef.num);
}
}
}
delete gfxFontDict;
}
obj1.free();
// recursively scan any resource dictionaries in objects in this
// resource dictionary
char *resTypes[] = { "XObject", "Pattern" };
for (Guint resType = 0; resType < sizeof(resTypes) / sizeof(resTypes[0]); ++resType) {
resDict->lookup(resTypes[resType], &objDict);
if (objDict.isDict()) {
for (i = 0; i < objDict.dictGetLength(); ++i) {
objDict.dictGetValNF(i, &obj1);
if (obj1.isRef()) {
// check for an already-seen object
const Ref r = obj1.getRef();
if (visitedObjects.find(r.num) != visitedObjects.end()) {
obj1.free();
continue;
}
visitedObjects.insert(r.num);
}
obj1.fetch(doc->getXRef(), &obj2);
if (obj2.isStream()) {
obj2.streamGetDict()->lookup("Resources", &resObj);
if (resObj.isDict() && resObj.getDict() != resDict) {
scanFonts(resObj.getDict(), fontsList);
}
resObj.free();
}
obj1.free();
obj2.free();
}
}
objDict.free();
}
}
FontInfo::FontInfo(GfxFont *font, PDFDoc *doc) {
GooString *origName;
Object fontObj, toUnicodeObj;
int i;
fontRef = *font->getID();
// font name
origName = font->getOrigName();
if (origName != NULL) {
name = font->getOrigName()->copy();
} else {
name = NULL;
}
// font type
type = (FontInfo::Type)font->getType();
// check for an embedded font
if (font->getType() == fontType3) {
emb = gTrue;
} else {
emb = font->getEmbeddedFontID(&embRef);
}
if (!emb)
{
DisplayFontParam *dfp = globalParams->getDisplayFont(font);
if (dfp)
{
if (dfp->kind == displayFontT1) file = dfp->t1.fileName->copy();
else file = dfp->tt.fileName->copy();
}
else file = NULL;
}
else file = NULL;
// look for a ToUnicode map
hasToUnicode = gFalse;
if (doc->getXRef()->fetch(fontRef.num, fontRef.gen, &fontObj)->isDict()) {
hasToUnicode = fontObj.dictLookup("ToUnicode", &toUnicodeObj)->isStream();
toUnicodeObj.free();
}
fontObj.free();
// check for a font subset name: capital letters followed by a '+'
// sign
subset = gFalse;
if (name) {
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() : NULL;
file = f.file ? f.file->copy() : NULL;
type = f.type;
emb = f.emb;
subset = f.subset;
hasToUnicode = f.hasToUnicode;
fontRef = f.fontRef;
embRef = f.embRef;
}
FontInfo::~FontInfo() {
delete name;
delete file;
}
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