2005.01.29 15:42 "[Tiff] almost finished hacking libtiff into a convivial shape", by Antoine

Hi,

I have managed to disable/change the things I need except for one - the offset to the first IFD. I need it to be 8. I have replaced the lines in tif_dirwrite.c:

    tif->tif_diroff = (TIFFSeekFile(tif, (toff_t) 0, SEEK_END)+1) &~ 1;
    diroff = tif->tif_diroff;

for

    if (tif->tif_header.tiff_diroff == 0)
        tif->tif_diroff = 8;
    else
        tif->tif_diroff = (TIFFSeekFile(tif, (toff_t) 0, SEEK_END)+1) &~ 1;

    diroff = 8; //tif->tif_diroff;

And it seems to be working to a point. The problem is that it borks the first couple of hundred scanlines. When I open with the gimp (2.0) it tells me

...
Tiff: /home/antt/programming/tiff-3.7.1/tools/well.tif: Premature EOL at scanline 199 (got 0, expected 2248) 
Tiff: /home/antt/programming/tiff-3.7.1/tools/well.tif: Premature EOL at scanline 200 (got 2247, expected 2248) 
Tiff: /home/antt/programming/tiff-3.7.1/tools/well.tif: Bad code word at scanline 201 (x 0) 
Tiff: /home/antt/programming/tiff-3.7.1/tools/well.tif: Premature EOL at scanline 201 (got 0, expected 2248) 
Tiff: /home/antt/programming/tiff-3.7.1/tools/well.tif: Line length mismatch at scanline 202 (got 2249, expected 2248)

Anyone got any ideas on this?

Cheers
Antoine