Saving a copy of the current GIF picture
Select "Write GIF as" from the File menu, or press Command-G to write
a copy of the GIF, MacPaint or PCX picture being currently displayed. You can
use this to make copies onto your hard disk (or a floppy disk) of favourite pictures
that you see whilst scanning a CDROM. In effect, this is the same as making a
note of the file name, and using the Finder to copy the file from the CDROM to
your disk. Please note that you should not infringe any copyright that might
pertain to the image being copied.
File formats-GIF or TIFF
When writing a copy of a GIF picture you are given two or three choices of file
- GIF (Graphics Interchange Format) - this is the fastest and probably the smallest
option, fastest because it is just a copy of the original GIF picture, which
is already compressed. Smallest because GIF pictures are always stored internally
with LZW compression. This option is greyed out and unavailable if the picture
you are viewing is a MacPaint, BMP,TGA, PCC or PCX picture - these can only
be saved as TIFF pictures.
- TIFF - use the TIFF (Tagged Image File Format) if you want to import a copy
of the picture into a word processor, desktop publishing program, or graphics
program that does not support GIF pictures. TIFF pictures are more widely supported
than GIF pictures, particularly by Macintosh programs. Once you have decided
to use the TIFF format, you have a choice of compressed or uncompressed files.
- TIFF compressed files are saved using LZW compression (similar to GIF pictures).
A TIFF compressed picture will be a similar size to a GIF picture. The compression
(and decompression later on when loading the picture into another program)
makes this format slightly slower to use than uncompressed TIFF images).
- TIFF uncompressed files tend to take two to three times as much disk as TIFF
compressed. However they are faster to save, and load later on. Also, some
other programs may not support TIFF compressed pictures. If you cannot load
a TIFF compressed picture into another program, try the TIFF uncompressed
Only GIF, MacPaint, BMP, TGA, PCC and PCX pictures can be saved
At present, you can only save copies of GIF, MacPaint, BMP, TGA, PCC and PCX
pictures as described above. Although this version of QuickSlideshow can read
TIFF and PICT files as well, it is not designed to save copies of those formats.
The reasons for this are:
- Most word processors on the Mac already support the other file formats, as
they are mostly "native" formats (especially PICT), so it is already
possible to load such files into word processors and desktop publishing programs.
- There are already other excellent "conversion" programs around, including
ShareWare ones, so to add general file conversion into QuickSlideshow is somewhat
of a duplication of effort.
- To successfully cross-convert from every format to every other one (e.g. TIFF
to MacPaint) would require considerable additional code in QuickSlideshow,
thus making it larger and more prone to bugs.
- Converting from colour formats (e.g. GIF) to monochrome formats (e.g. MacPaint)
also requires some method of "dithering" or otherwise converting
the colour information to black-and-white. This also adds complexity.
- QuickSlideshow is intended to be a fast, easy-to-use viewing program. The author's
future efforts will be directed to improving it in that direction.
Comments to Gammon Software support
Page updated on Wednesday, 15 December 2004