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Thumbnail generator

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svn path=/trunk/playground/graphics/okular/mobipocket/; revision=882597
remotes/origin/mobipocket
Jakub Stachowski 18 years ago
parent 9260931bbd
commit 4361d56b2b
9 changed files with 117 additions and 14 deletions
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  1. 12
      CMakeLists.txt
  2. 2
      TODO
  3. 8
      converter.cpp
  4. 2
      mobidocument.cpp
  5. 34
      mobipocket.cpp
  6. 5
      mobipocket.h
  7. 37
      mobithumbnail.cpp
  8. 8
      mobithumbnail.desktop
  9. 23
      mobithumbnail.h

12
CMakeLists.txt
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@ -23,15 +23,23 @@ set(okularGenerator_mobi_PART_SRCS
generator_mobi.cpp
)
set(mobithumbnail_SRCS
mobipocket.cpp
decompressor.cpp
mobithumbnail.cpp
)
kde4_add_plugin(okularGenerator_mobi ${okularGenerator_mobi_PART_SRCS})
kde4_add_plugin(mobithumbnail ${mobithumbnail_SRCS})
target_link_libraries(okularGenerator_mobi okularcore ${mobi_LIBRARIES} ${KDE4_KDECORE_LIBS} ${QT_QTGUI_LIBRARY})
target_link_libraries(mobithumbnail ${KDE4_KDECORE_LIBS} ${KDE4_KIO_LIBS} ${QT_QTGUI_LIBRARY} )
install(TARGETS okularGenerator_mobi DESTINATION ${PLUGIN_INSTALL_DIR})
install(TARGETS mobithumbnail okularGenerator_mobi DESTINATION ${PLUGIN_INSTALL_DIR})
########### install files ###############
install( FILES libokularGenerator_mobi.desktop okularMobi.desktop DESTINATION ${SERVICES_INSTALL_DIR} )
install( FILES mobithumbnail.desktop libokularGenerator_mobi.desktop okularMobi.desktop DESTINATION ${SERVICES_INSTALL_DIR} )
install( FILES okularApplication_mobi.desktop DESTINATION ${XDG_APPS_INSTALL_DIR} )
install(

2
TODO
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@ -2,3 +2,5 @@
- tests for Mobipocket classes
- anchors (a filepos=)
- decryption for DRMed files (may be impossible and/or illegal)
- strigi analyzer
- thumbnail generator does not for some files (DRMed i think)

8
converter.cpp
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@ -50,8 +50,12 @@ QTextDocument* Converter::convert( const QString &fileName )
{
MobiDocument* newDocument=new MobiDocument(fileName);
if (!newDocument->mobi()->isValid()) {
if (newDocument->mobi()->hasDRM()) emit error(i18n("This book is protected by DRM and can be displayed only on designated device"), -1);
else emit error(i18n("Error while opening the Mobipocket document."), -1);
emit error(i18n("Error while opening the Mobipocket document."), -1);
delete newDocument;
return NULL;
}
if (newDocument->mobi()->hasDRM()) {
emit error(i18n("This book is protected by DRM and can be displayed only on designated device"), -1);
delete newDocument;
return NULL;
}

2
mobidocument.cpp
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@ -40,7 +40,7 @@ QVariant MobiDocument::loadResource(int type, const QUrl &name)
if (!ok || recnum>=doc->imageCount()) return QVariant();
QVariant resource;
resource.setValue(doc->getImage(recnum));
resource.setValue(doc->getImage(recnum-1));
addResource(type, name, resource);
return resource;

34
mobipocket.cpp
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@ -86,23 +86,30 @@ int PDB::recordCount() const
////////////////////////////////////////////
struct DocumentPrivate
{
DocumentPrivate(QIODevice* d) : pdb(d), valid(true), firstImageRecord(0), isUtf(false), drm(false) {}
DocumentPrivate(QIODevice* d) : pdb(d), valid(true), firstImageRecord(0), isUtf(false),
drm(false), thumbnailIndex(0) {}
PDB pdb;
Decompressor* dec;
quint16 ntextrecords;
bool valid;
// number of first record holding image. Usually it is directly after end of text, but not always
quint16 firstImageRecord;
QMap<Document::MetaKey, QString> metadata;
bool isUtf;
bool drm;
// index of thumbnail in image list. May be specified in EXTH.
// If not then just use first image and hope for the best
int thumbnailIndex;
void init();
void findFirstImage();
void parseEXTH(const QByteArray& data);
void parseHtmlHead(const QString& data);
QString readEXTHRecord(const QByteArray& data, quint32& offset);
QString decodeString(const QByteArray& data) const;
QImage getImageFromRecord(int recnum);
};
QString DocumentPrivate::decodeString(const QByteArray& data) const
@ -139,7 +146,7 @@ void DocumentPrivate::init()
QByteArray mhead=pdb.getRecord(0);
dec = Decompressor::create(mhead[1], pdb);
if ((int)mhead[12]!=0 || (int)mhead[13]!=0) drm=true;
if (!dec || drm) {
if (!dec) {
valid=false;
return;
}
@ -151,7 +158,7 @@ void DocumentPrivate::init()
if (mhead.size()>176) parseEXTH(mhead);
// try getting metadata from HTML if nothing or only title was recovered from MOBI and EXTH records
if (metadata.size()<2) parseHtmlHead(decodeString(dec->decompress(pdb.getRecord(1))));
if (metadata.size()<2 && !drm) parseHtmlHead(decodeString(dec->decompress(pdb.getRecord(1))));
}
void DocumentPrivate::findFirstImage() {
@ -177,6 +184,14 @@ QString DocumentPrivate::readEXTHRecord(const QByteArray& data, quint32& offset)
return ret;
}
QImage DocumentPrivate::getImageFromRecord(int i)
{
QByteArray rec=pdb.getRecord(i);
QByteArray rec2=pdb.getRecord(i-2);
return QImage::fromData(rec);
}
void DocumentPrivate::parseEXTH(const QByteArray& data)
{
// try to get name
@ -201,6 +216,7 @@ void DocumentPrivate::parseEXTH(const QByteArray& data)
case 103: metadata[Document::Description]=readEXTHRecord(data,offset); break;
case 105: metadata[Document::Subject]=readEXTHRecord(data,offset); break;
case 109: metadata[Document::Copyright]=readEXTHRecord(data,offset); break;
case 202: thumbnailIndex = readBELong(data,offset); offset+=4; break;
default: readEXTHRecord(data,offset);
}
}
@ -240,9 +256,7 @@ bool Document::isValid() const
QImage Document::getImage(int i) const
{
if (!d->firstImageRecord) d->findFirstImage();
QByteArray rec=d->pdb.getRecord(d->firstImageRecord+i-1);
//FIXME: check if i is in range
return QImage::fromData(rec);
return d->getImageFromRecord(d->firstImageRecord+i);
}
QMap<Document::MetaKey,QString> Document::metadata() const
@ -255,4 +269,10 @@ bool Document::hasDRM() const
return d->drm;
}
QImage Document::thumbnail() const
{
if (!d->firstImageRecord) d->findFirstImage();
return d->getImageFromRecord(d->thumbnailIndex+d->firstImageRecord);
}
}

5
mobipocket.h
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@ -42,9 +42,10 @@ public:
QString text() const;
int imageCount() const;
QImage getImage(int i) const;
QImage thumbnail() const;
bool isValid() const;
// if true then isValid() will return false
// if true then it is impossible to get text of book. Images should still be readable
bool hasDRM() const;
private:
DocumentPrivate* const d;

37
mobithumbnail.cpp
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@ -0,0 +1,37 @@
/***************************************************************************
* Copyright (C) 2008 by Jakub Stachowski <qbast@go2.pl> *
* *
* This program 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. *
***************************************************************************/
#include "mobithumbnail.h"
#include "mobipocket.h"
#include <QtCore/QFile>
extern "C"
{
KDE_EXPORT ThumbCreator *new_creator()
{
return new MobiThumbnail;
}
}
bool MobiThumbnail::create(const QString &path, int width, int height, QImage &img)
{
QFile f(path);
f.open(QIODevice::ReadOnly);
Mobipocket::Document doc(&f);
if (!doc.isValid()) return false;
img=doc.thumbnail();
return !img.isNull();
}
ThumbCreator::Flags MobiThumbnail::flags() const
{
return static_cast<Flags>(None);
}

8
mobithumbnail.desktop
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@ -0,0 +1,8 @@
[Desktop Entry]
Type=Service
Name=Mobipocket thumbnailer
X-KDE-ServiceTypes=ThumbCreator
MimeType=application/x-mobipocket;
X-KDE-Library=mobithumbnail
CacheThumbnail=true

23
mobithumbnail.h
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@ -0,0 +1,23 @@
/***************************************************************************
* Copyright (C) 2008 by Jakub Stachowski <qbast@go2.pl> *
* *
* This program 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. *
***************************************************************************/
#ifndef MOBITHUMBNAIL_H
#define MOBITHUMBNAIL_H
#include <kio/thumbcreator.h>
class MobiThumbnail : public ThumbCreator
{
public:
MobiThumbnail() {}
virtual bool create(const QString &path, int, int, QImage &img);
virtual Flags flags() const;
};
#endif
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