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August 2007

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2007.08.17 19:00 "How to write a planar tiff file", by Christian Henning

2007.08.17 19:03 "Re: How to write a planar tiff file", by Toby Thain

2007.08.17 19:10 "How to write a planar tiff file", by Christian Henning

2007.08.17 19:57 "Re: How to write a planar tiff file", by Kai-uwe Behrmann

2007.08.17 19:00 "How to write a planar tiff file", by Christian Henning

Hi there, I'm having problems writing a planar image file. Can
somebody spot the problem in the following code. It's the most basic
writer I can think of.

int main()
{
   TIFF* file = TIFFOpen( "write_test.tif", "w" );

   TIFFSetField( file, TIFFTAG_IMAGEWIDTH  , 100 );
   TIFFSetField( file, TIFFTAG_IMAGELENGTH , 100 );
   TIFFSetField( file, TIFFTAG_COMPRESSION, COMPRESSION_LZW );
   TIFFSetField( file, TIFFTAG_PLANARCONFIG, PLANARCONFIG_SEPARATE );
   TIFFSetField( file, TIFFTAG_BITSPERSAMPLE  , 8 );
   TIFFSetField( file, TIFFTAG_SAMPLESPERPIXEL, 3 );


   std::vector< unsigned char > row( 100 );

   for( int c = 0; c < 3; ++c )
   {
      for( int y = 0; y < 100; ++y )
      {
         int size = TIFFWriteScanline( file
                                     , &row.front()
                                     , y
                                     , c           );

         io_error_if( size == -1, "Write error." );
      }
   }

   TIFFClose( file );
}


Thanks ahead,
Christian