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Readme.First.ppmtogif
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1991-11-15
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Note: This is a very primitive port of ╥ppmtogif╙ from the ╥pbm╙
package that was developed by Jef Poskanzer. These
programs are still in the testing phase. This program is intended to
be used as a bridge until the final versions become available.
This program converts file from ╥ppm256╙ format to gif format.
Usage:
Place the application in the same folder where the .ppm256 file
resides.
Launch the application. When the console dialog appears, at the
point where the cursor is positioned, enter:
<file>.ppm256 <file>.gif
For example, if I have a file named ╥test.ppm256╙, I would be
presented
with a line like:
ppmtogif
to which I would add to make the complete line:
ppmtogif test.ppm256 test.gif
Press return or click ╥OK╙.
I╒ve included the ╥README╙ file from the original distribution.
The only differences between this program and the distribution the
display of the opening copyright messages and changes necessary to
make things run properly on the Mac. This version was compiled
from a version that was posted on ╥alt.graphics.pixutils╙
There are two versions of this program being posted. ╥ppmtogif╙ was
compiled with vanilla 60000 code and no 68881 math co-processor
support. It should run on any Mac. The time required to
convert a 297K ppm256 file into a 110K gif file was about forty
seconds (not counting the time required for the final write to flush
the output file. The timing was done on a Mac IIci.
The ╥ppmtogif.020.68881╙ version has been compiled with both
68020
and 68881 code generation enabled. It will only work on Macs that
have both of these chips. The timing for the above decompression
was about 25 seconds.
You will also need to obtain the ╥djpeg╙ and ╥ppmquant╙
programs to make proper use of this program. They were posted
earlier this week.