AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

Thread

1993.08.20 01:22 "help on TIFFReadRGBAImage", by Yip Chi Lap
1993.08.20 09:40 "Re: help on TIFFReadRGBAImage", by Karsten Spang
1993.08.21 01:08 "Re: help on TIFFReadRGBAImage", by Sam Leffler
1993.08.21 02:03 "Re: help on TIFFReadRGBAImage", by Yip Chi Lap
1993.08.22 18:02 "Re: help on TIFFReadRGBAImage", by Sam Leffler
1993.08.22 20:07 "Re: help on TIFFReadRGBAImage", by Sam Leffler
1993.08.23 08:07 "help on TIFFReadRGBAImage", by Oliver Trepte
1993.08.23 04:08 "Re: help on TIFFReadRGBAImage", by Yip Chi Lap
1993.08.23 10:58 "help on TIFFReadRGBAImage", by Oliver Trepte

1993.08.21 01:08 "Re: help on TIFFReadRGBAImage", by Sam Leffler

I have written a small program to open a TIFF file, read it using TIFFRGBAImage, and then dump the image out byte by byte in hex. I found that the scanline order seems to be reversed.

I scanned archive.May2593-Aug1893 and found only one reference to this function. I use libtiff v3.21 BETA compiled on an multiprocessor sun (`mach`=sparc, `arch`=sun4). The program and the pnm file used to create the tiff file is attached below. Thanks for your help in advance.

I suspect that you wrote the TIFF file with the default Orientation which is TopLeft. You don't indicate how you created the TIFF file. ppm2tiff looks to force all data to have a TopLeft origin.

Sam