workspace/kcontrol/kfontinst/thumbnail/FontThumbnail.cpp

   1 /*
   2  * KFontInst - KDE Font Installer
   3  *
   4  * Copyright 2003-2007 Craig Drummond <craig@kde.org>
   5  *
   6  * ----
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; see the file COPYING.  If not, write to
  20  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21  * Boston, MA 02110-1301, USA.
  22  */
  23
  24 #include "FontThumbnail.h"
  25 #include "KfiConstants.h"
  26 #include "FcEngine.h"
  27 #include <QtGui/QImage>
  28 #include <QtGui/QPixmap>
  29 #include <QtCore/QFile>
  30 #include <KDE/KGlobalSettings>
  31 #include <KDE/KLocale>
  32 #include <KDE/KUrl>
  33 #include <KDE/KZip>
  34 #include <KDE/KTempDir>
  35 #include <KDE/KMimeType>
  36 #include <KDE/KStandardDirs>
  37 #include <KDE/KDebug>
  38
  39 #define KFI_DBUG kDebug(7115)
  40
  41 extern "C"
  42 {
  43     KDE_EXPORT ThumbCreator *new_creator()
  44     {
  45         return new KFI::CFontThumbnail;
  46     }
  47 }
  48
  49 namespace KFI
  50 {
  51
  52 CFontThumbnail::CFontThumbnail()
  53 {
  54     KGlobal::locale()->insertCatalog(KFI_CATALOGUE);
  55 }
  56
  57 bool CFontThumbnail::create(const QString &path, int width, int height, QImage &img)
  58 {
  59     QPixmap  pix;
  60     QString  realPath(path);
  61     KTempDir *tempDir = 0;
  62
  63     CFcEngine::setBgndCol(Qt::white);
  64     CFcEngine::setTextCol(Qt::black);
  65
  66     KFI_DBUG << "Create font thumbnail for:" << path << endl;
  67
  68     // Is this a fonts/package file? If so, extract 1 scalable font...
  69     if(Misc::isPackage(path))
  70     {
  71         KZip zip(path);
  72
  73         if(zip.open(QIODevice::ReadOnly))
  74         {
  75             const KArchiveDirectory *zipDir=zip.directory();
  76
  77             if(zipDir)
  78             {
  79                 QStringList fonts(zipDir->entries());
  80
  81                 if(fonts.count())
  82                 {
  83                     QStringList::ConstIterator it(fonts.begin()),
  84                                                end(fonts.end());
  85
  86                     for(; it!=end; ++it)
  87                     {
  88                         const KArchiveEntry *entry=zipDir->entry(*it);
  89
  90                         if(entry && entry->isFile())
  91                         {
  92                             delete tempDir;
  93                             tempDir=new KTempDir(KStandardDirs::locateLocal("tmp", KFI_TMP_DIR_PREFIX));
  94                             tempDir->setAutoRemove(true);
  95
  96                             ((KArchiveFile *)entry)->copyTo(tempDir->name());
  97
  98                             QString mime(KMimeType::findByPath(tempDir->name()+entry->name())->name());
  99
 100                             if(mime=="application/x-font-ttf" || mime=="application/x-font-otf" ||
 101                                mime=="application/x-font-type1")
 102                             {
 103                                 realPath=tempDir->name()+entry->name();
 104                                 break;
 105                             }
 106                             else
 107                                 ::unlink(QFile::encodeName(tempDir->name()+entry->name()).data());
 108                         }
 109                     }
 110                 }
 111             }
 112         }
 113     }
 114
 115     if(CFcEngine::instance()->draw(KUrl(realPath), width, height, pix, 0, true))
 116     {
 117         img=pix.toImage().convertToFormat(QImage::Format_ARGB32);
 118
 119         int pixelsPerLine=img.bytesPerLine()/4;
 120
 121         for(int l=0; l<img.height(); ++l)
 122         {
 123             QRgb *scanLine=(QRgb *)img.scanLine(l);
 124
 125             for(int pixel=0; pixel<pixelsPerLine; ++pixel)
 126                 scanLine[pixel]=qRgba(qRed(scanLine[pixel]), qGreen(scanLine[pixel]),
 127                                       qBlue(scanLine[pixel]),
 128                                       0xFF-qRed(scanLine[pixel]));
 129         }
 130
 131         delete tempDir;
 132         return true;
 133     }
 134
 135     delete tempDir;
 136     return false;
 137 }
 138
 139 ThumbCreator::Flags CFontThumbnail::flags() const
 140 {
 141     return None;
 142 }
 143
 144 }