kimgio/g3r.cpp

   1 /**
   2 * QImageIO Routines to read/write g3 (fax) images.
   3 * copyright (c) 2000, Matthias Hölzer-Klüpfel <hoelzer@kde.org>
   4 *
   5 * This library is distributed under the conditions of the GNU LGPL.
   6 */
   7
   8 #include "g3r.h"
   9
  10 #include <config.h>
  11
  12 #include <tiffio.h>
  13
  14 #include <qimage.h>
  15 #include <qfile.h>
  16
  17 KDE_EXPORT void kimgio_g3_read( QImageIO *io )
  18 {
  19     // This won't work if io is not a QFile !
  20   TIFF *tiff = TIFFOpen(QFile::encodeName(io->fileName()), "r");
  21   if (!tiff)
  22     return;
  23
  24   uint32 width, height;
  25   tsize_t scanlength;
  26
  27   if( TIFFGetField( tiff, TIFFTAG_IMAGEWIDTH, &width ) != 1
  28       || TIFFGetField( tiff, TIFFTAG_IMAGELENGTH, &height ) != 1 )
  29       return;
  30   scanlength = TIFFScanlineSize(tiff);
  31
  32   QImage image(width, height, 1, 0, QImage::BigEndian);
  33
  34   if (image.isNull() || scanlength != image.bytesPerLine())
  35     {
  36       TIFFClose(tiff);
  37       return;
  38     }
  39
  40   for (uint32 y=0; y < height; y++)
  41     TIFFReadScanline(tiff, image.scanLine(y), y);
  42
  43   TIFFClose(tiff);
  44
  45   io->setImage(image);
  46   io->setStatus(0);
  47 }
  48
  49
  50 KDE_EXPORT void kimgio_g3_write(QImageIO *)
  51 {
  52         // TODO: stub
  53 }
  54