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- TIFF_Files.txt
- ==============
-
- LIBTIFF is the C library for handling TIFF files, by Sam Leffler of Silicon
- Graphics. I have completed the Acorn port of this library, and have uploaded
- it here. I am:
-
- Peter Greenham
- peter@enlarion.demon.co.uk
-
-
- Files:
-
- tiff-v3.4beta024.tar.gz
- =======================
- This is the full LIBTIFF distribution source archive. It is not
- Acorn-specific, but the Acorn port files are included, as well as those for
- various other platforms. Also included here is full documentation in html
- format. ArcWeb is quite happy reading these locally, but you will want to set
- the filetype first I expect.
-
- There are lots of long filenames in here. Have fun!
-
- You might prefer to download this one than the one on sgi's ftp server, as
- the latter tends to grind to a halt when accessed from here. If you *must*
- get it from ftp.sgi.com, use BatchFTP.
-
- Also, the current archive on ftp.sgi.com is missing some of the Acorn port
- files included here. Simple omission which will be rectified shortly anyway.
-
- LIBTIFF-v3.4beta024.spk
- =======================
- This is the extracted Acorn version of LIBTIFF. This is what is produced by
- running the contrib.acorn.install script supplied in the first file. However,
- as that procedure is a little fraught (mostly because Acorn haven't figured
- out that long filenames are a Good Thing), I have included this archive. This
- contains the source files sorted into an Acorn C style directory structure,
- with the makefile. You should just need to extract the LIBTIFF directory, run
- SetVars, and run Makefile.
-
- tiffin_200.spk
- ==============
- This is version 2.00 of Tiffin, an application written using LIBTIFF, which
- translates images between sprites and TIFFs. Drop a tiff on it, you can save
- a sprite, drop a sprite, save a tiff. It's that simple. It also allows batch
- operation, for processing entire directories of images. This application, and
- my port effort on LIBTIFF itself, was started because no available Acorn
- software could cope with some fairly common TIFFs. ie: those exported by
- PhotoShop 3.0. In addition, TIFF creation under RISC OS was being fraught,
- with Creator giving problems and PhotoDesk not allowing compression.
-
- This application is much enhanced over the previous version uploaded here. It
- now loads the image into a window (handling multiple images as far as memory
- allows).
-
- In TIFF to Sprite conversion, Tiffin always creates a 32-bit sprite,
- faithfully reproducing the quality of the original TIFF image. This is the
- primary reason why it is only compatible with RISC OS 3.50 or later (though
- another reason is the use of Dynamic Areas). You can, of course, use
- ChangeFSI to take the resulting images down to other scales/depths.
-
- In Sprite to TIFF conversion, it allows LZW compression (optionally), and a
- choice between 24-bit and 32-bit RGB format. 24-bit is readable by ChangeFSI,
- whereas 32-bit isn't. 32-bit is valid, however and Tiffin, and other
- applications (such as PhotoShop) are quite happy with them.
-
- NB: 32-bit sprite to 32-bit TIFF is the fastest conversion in this direction,
- as it can just dump the data from the sprite's pixel raster rather than
- having to process it to get RGB data.
-
- NB: Tiffin is programmed using Acorn's Toolbox. When first run, Tiffin will
- automatically update your !System if necessary (unless you've been playing
- silly games with datestamps - it only copies its versions if they're newer
- than the ones already in !System). This is done in the !Run file so it's easy
- to comment out if you really object. I wouldn't bother though, it's quite
- safe.
-
- To do:
- Allow creation of 32-bit CMYK TIFFs (useful for DTP work), and Index-Coloured
- TIFFs direct from 1,2,4,8-bit sprites (which will make processing them
- considerably faster). Also allow proper setting of picture resolution.
- Possibly allow interactive access to all TIFF tags used in an image.
-
- Misty.tif
- =========
- This file and others like it were the source of all the problems! Created
- under KPT Bryce on a Power Macintosh and converted to TIFF by PhotoShop 3.0
- (with no extra image-processing); ChangeFSI, PhotoDesk and
- Impression/ArtWorks could make no sense of it. It's all down to Alpha
- Channels, apparently.
-
- Tiffin reads this fine, as well as just about every other TIFF thrown at it
- (a couple of the very esoteric LIBTIFF test files fail).
-
-