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documentation:development:opera:pf25:ppgfldr:smmfldr:gspfldr:07pgs002

ppmto3DO


ppmto3DO

Converts a PPM file to 3DO format.

Synopsis

ppmto3DO [flags] <ppmimagefile> < 3DOimagefile>

Description

Converts a file in portable pixmap (PPM) format to 3DO image format.

Options

  • -b pixels of the output image are in 5541 format, with the low bit of the blue component used as a corner weight
  • -c output a 16-bit-per-pixel, non-LR-form image suitable for processing by makecel
  • -d write to the output file a dynamic VDL containing a CLUT for each display line; default is no CLUT written
  • -f write to the output file a fixed VDL containing a single CLUT for the image; default is no CLUT written
  • -t N specify a color in the input image to be translated to transparent (zero) in the output image; N is a hexadecimal number representing a 16-bit, 555-RGB color value
  • -v print total number of colors in output image
  • -e N place entries in the generated CLUT beginning at index N; default is 0; the values supplied to -ce and -me must add to be 32 or less.
  • -m N use at most N entries in the generated CLUT; default is 32

The following options specify how the colors entered in the generated CLUT are selected from the colors found in the input image (or a line of the input image, when -d is in effect):

  • -s0 entries evenly distributed across the color space; default when -d is not in effect
  • -s1 entries that are the most popular color values
  • -s2 entries that represent approximately equal regions of the color space by population
  • -s3 entries that represent subdivisions of longest intervals between color values
  • -s4 entries that represent subdivisions of intervals containing the largest numbers of colors (population)
  • -s5 entries that represent subdivisions of longest intervals based on color value weighted by population; default when -d is ineffect

Implementation

MPW tool

Caveats

None.

See Also

documentation/development/opera/pf25/ppgfldr/smmfldr/gspfldr/07pgs002.txt · Last modified: 2022/10/10 16:53 by 127.0.0.1