Dump the screen to PaintJet printer file

This option creates a file suitable for printing on a PaintJet XL colour ink jet printer. The file is NOT compatible with the original PaintJet printer. Note that the file does not contain a form feed character to eject the page. This is to allow more than one plot to be created on the same page. While it is possible to feed standard paper through the printer more than once, it is not possible to do this with overhead transparencies.

Screen dump of which buffer ?

This entry determines which buffer the screen dump is to be made of. Any DigImage buffer may be dumped. The selected buffer is made the current output buffer. If an extended memory buffer is selected it is first copied to buffer 0.

Screen dump of Window or Screen ?

The screen dump may be made of a window within a buffer (<W>) or the entire screen (<S>).

{If screen dump of window selected} Window Selection: Screen dump region If screen dumping of a window is selected, then the Window Selection submenu will be produced to allow the specification of the window to be dumped. For more help on window selection, refer to the [H Help] option within the submenu.

Name of output file (defaults to .JET extension) ?

This entry specifies the name of the file to contain the screen dump information. If no extension is given, then .JET will be appended to the file name. If you do not wish to have an extension, finish the file name with a full stop. The file must subsequently be printed using the PrintJet utility supplied with DigImage or similar printer driver. Note that the standard MS-DOS PRINT command is not suitable as it alters some character sequences which corrupts the file.

Title for image ?

The string entered here will be printed out as the title for the plot, which is printed above the plot. If a title is specified, the name of the file and some other rendering information is printed below the plot. This additional text will not be printed if no plot title is specified.

Width of printed image (in mm) ?

This entry specifies the width of the image on the printed page. The width should be given in millimetres. The default of 200 is the largest for an A4 page. Sizes up to 280mm may be used in conjunction with an A3 printer. If a width of zero is specified, then the width is calculated automatically from the height specification (next prompt) in such a way as to preserve the aspect ratio.

Height of printed image (in mm) ?

This entry specifies the height of the image on the printed page. The height should be given in millimetres. The default value is that which will preserve the aspect ratio of the image using the width specified at the previous prompt.

Left margin (in mm) ?

This entry specifies the offset into the page for the left most edge of the image. A zero value will place the image as far to the left as is possible on the page.

Number of bit planes ?

This entry specifies the number of colour bit planes to be used in the screen dump. The smaller the number of bit planes, the more rapid the printing process, and the smaller the print file.

Render by Error diffusion, Ordered dithering, Clustered dithering, or Snap to primaries ?

This selection determines the type of rendering algorithm used to transfer the colour images onto paper. Error diffusion (<E>) normally gives the best results. Error diffusion (<E>), ordered (<O>) and clustered (<C>) dithering give true colours while <S> prints the plot using primary colours. Experimentation will determine the best option in any given circumstance. Refer to the printer's manual for further details.

Gamma correction factor ?

Gamma correction is used to compensate for the nonlinear response of most output devices. The intensity used, I, is related to the specified intensity i by P = p**Gamma. On most occassions, a value of around 1.5 is appropriate. Refer to printer manual for more details.

Parent menu

Main Menu

DigImage User Documentation

Stuart Dalziel, last page update: 19 February 1996