Macintosh file formats
This uses Apple's extended version of ASCII. When exported to non-mac
machines, note that
- Some special characters (like the pounds sign, dash, angled double
quotes, etc) may cause trouble
- DOS expects 2 control characters at the end of each text line.
Unix and MocOS expect a single new-line character.
Rich Text Format (Microsoft) files are text-only files
containing formating information. Programs like Word can read and write
files in this format. Convertors exist to convert RTF files to
LaTeX or HTML.
An old format, used for Mac screen captures, etc. Files can
be pasted into the Scrapbook.
It's a combination of bitmaps and vectors. The format has evolved to
keep pace with the hardware.
One can save a custom color palette as part of a PICT2 file, but it isn't
always exported or imported.
- PICT1 (72dpi mono).
- PICT2 (256 colors)
- PICT2 enhanced (24bit - 16.7 million colors)
The PICS format can cope with sequences of PICT files - useful for
Tagged Image File Format (Aldus/Microsoft). This format is
widely supported on Macs and PCs. It's especially popular when scanning
images in. It's a bitmap format so images don't scale up well. It's a
flexible and extensible format, which leads to compatibility problems.
There are 4 main groups of TIFF file types
Sometimes a program will just have a 'color TIFF' option, not saying
whether it's type P or type R TIFF. Also there
are various types of compression that the TIFF format can accomodate,
causing further confusion.
Though the pictures aren't easily edited, the palette can be quite
- B- 1 bit
- G - 256 grey scale
- P - palette color (a stored palette of colors used)
- R - full color
Encapsulated Postscript (Adobe).
A low-res screen preview (in PICT1 or PICT2 on the Mac, TIFF on PCs) and
a vector or bitmap body. EPS files can be scaled without pixelating, but
they can't be edited. For storing bitmap information they're bulky, though
the binary option helps and Postscript level 2 includes compression
techniques. Postscript files are easily imported into documents on most
EPS5 files have 4 CMYK separations and a PICT1 preview.
Once you have binhex you can get Stuffit Expander
HENSA archive. This extracts files from the three most popular
archive-based compression formats found on the Macintosh: StuffIt archives,
Compact Pro archives and AppleLink packages.
- .hqx - Binhex files.
- .sit - Stuffit files.
- .cpt - Compact Pro file.
Many programs have their own formats (Word, Pagemaker, etc). Some
programs accept files in other program's formats, but the results
aren't always perfect. Amonget the many other file formats used are
- RIFF - for compressed bitmaps (Letraset)
- RIB - CAD and 3D (Pixar's Renderman)
On the Mac, programs like Adobe photoshop can be used to do
converting. On the CUED teaching system (Unix) the netpbm suite of conversion programs can
deal with TIFF and PICT files.