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- A few things that are not mentioned in the manual pages:
-
- ppmhist has a new option "-map", this causes the histogram
- to be printed in PPM P3 format, suitable to be used as a
- colormap for ppmquant.
-
- pnmcomp accepts a PBM mask file instead of PGM alpha map with
- the -mask option. A value of PBM_WHITE in the mask means
- a tranparent pixel, PBM_BLACK an opaque pixel. This can
- be reversed with the -inverse option. The outfile has been
- remove from the args list, it now writes always to stdout.
-
- pnmscale accepts a few more options:
- -maxxsize or -maxwidth
- -maxysize or -maxheight
- Scale width (height) to fit into the given size, but to not scale
- if the width (height) is already smaller than this.
- -minxsize or -minwidth
- -minysize or -minheight
- Same as above, but scales if the width (height) is smaller and does
- not scale if it is already larger.
- -maxxysize or -maxsize
- -minxysize or -minsize
- Same as above for both width and height, keeping aspect ratio.
- Example:
- pnmscale -maxsize 800 600 infile.ppm > outfile.ppm
- Scales the infile to fit into 800x600 pixels, but does not scale if the
- size of the image is already smaller than 800x600.
-
- ppmchange now accepts any number of changes on the command line, and you can
- also use a file containing the changes with the -file option. The -other
- option can be used to change any color that is _not_ in the changes list.
-
-
- The rexx directory contains AReXX-versions of the Unix shell-scripts anytopnm,
- pnmindex, pnmmargin and pnmsmooth. Some of the scripts produce temporary
- files that can become quite large. These files are generated in PBMTMP:, if
- this assignment does not exists it is assigned to T:.
- pnmindex has a few more options:
- -qfast use ppmqvga instead of ppmquant for quantization
- -qonce only quantize the final image, not every intermediate file
- -font <font> passed to pbmtext
- -filter <f> run the files through this filter first
- -printsizes print image sizes under the file names
- -nopath do not print the path in the file names
-
-