home *** CD-ROM | disk | FTP | other *** search
- Hi,
- I'm trying to append some images to an existing TIFF file that already has
- an image in it. I'm not having much sucess doing this. Here is the sequence
- of calls I'm making:
- tiff = TIFFFOpen(filename, "r+"); //I've also tried "a" without success
- TIFFSetField(tiff, TIFFTAG_IMAGEWIDTH, xsize);
- TIFFSetField(tiff, TIFFTAG_IMAGELENGTH, ysize);
- TIFFSetField(tiff, TIFFTAG_IMAGEDEPTH, 1);
- TIFFSetField(tiff, TIFFTAG_BITSPERSAMPLE, bpp);
- TIFFSetField(tiff, TIFFTAG_SAMPLEFORMAT, ttype);
- TIFFSetField(tiff, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
- TIFFSetField(tiff, TIFFTAG_ORIENTATION,ORIENTATION_TOPLEFT);
- TIFFSetField(tiff, TIFFTAG_SAMPLESPERPIXEL, csize);
- TIFFSetField(tiff, TIFFTAG_TILEWIDTH, xPageSize);
- TIFFSetField(tiff, TIFFTAG_TILELENGTH, yPageSize);
- TIFFSetField(tiff, TIFFTAG_TILEDEPTH, 1);
- TIFFWriteDirectory(tiff);
- TIFFSetDirectory(tiff, 1); //this always fails and I get the message :
- //"Could not index into TIFF directory"
- While(..there are tiles to write..)
- TIFFWriteEncodedTile (tiff, tile, bufdata, bytecount);
-
- Even if I take out the TIFFSetDirectory() call, what happens is that the
- existing file has been corrupted and can't be read at all.
- Anyone successfully appended images ? The README file says that the append
- mode hasn't been tested.
- Any help is welcome.
- -venky
-
- --
- ---
- Venkatesh Narayanan Silicon Graphics, Inc.
- AGD/Image Processing (415) 390-5314 venky@sgi.com
-
-
-