PPMTOPJXL

ppmtopjxl - convert a portable pixmap into an HP PaintJet XL PCL file

ppmtopjxl [-nopack] [-gamma <n> ] [-presentation] [-dark] [-diffuse] [-cluster] [-dither] [-xshift <s> ] [-yshift <s> ] [-xshift <s> ] [-yshift <s> ] [-xsize|-width|-xscale <s> ] [-ysize|-height|-yscale <s> ] [ppmfile]

Reads a portable pixmap as input. Produces a PCL file suitable for printing on an HP PaintJet XL printer as output.

The generated file is not suitable for printing on a normal PrintJet printer. The ?nopack option generates a file which does not use the normal TIFF 4.0 compression method. This file might be printable on a normal PaintJet printer (not an XL).

The ?gamma option sets the gamma correction for the image. The useful range for the PaintJet XL is approximately 0.6 to 1.5.

The rendering algorithm used for images can be altered with the -dither, -cluster, and -diffuse options. These options select ordered dithering, clustered ordered dithering, or error diffusion respectively. The ?dark option can be used to enhance images with a dark background when they are reduced in size. The ?presentation option turns on presentation mode, in which two passes are made over the paper to increase ink density. This should be used only for images where quality is critical.

The image can be resized by setting the ?xsize and ?ysize options. The parameter to either of these options is interpreted as the number of dots to set the width or height to, but an optional dimension of ‘pt’ (points), ‘dp’ (decipoints), ‘in’ (inches), or ‘cm’ (centimetres) may be appended. If only one dimension is specified, the other will be scaled appropriately.

The options ?width and ?height are synonyms of ?xsize and ?ysize.

The ?xscale and ?yscale options can alternatively be used to scale the image by a simple factor.

The image can be shifted on the page by using the ?xshift and ?yshift options. These move the image the specified dimensions right and down.

ppm(5)

Angus Duggan