The Graphics command set contains the Graphics Object Content Architecture (GOCA) drawing orders used to present graphics. The graphics can be used in a page, a page segment or an overlay.
The Océ VarioPrint 6000 Series support the subset DR/2V0. Some additional GOCA functions are also supported.
The GOCA line width is an integer (Set Line Width drawing order) or decimal (Set Fractional Line Width drawing order) multiplier of the normal line width. The normal line width (NLW) is approximately 0.01” or 10 mils (1 mils = 1/1000”).
With a 240 dpi print head resolution, the normal line width would be 2.4 pixels. After dropping the decimal, a one NLW wide line will be printed with 2 pixels or 8 mils instead of the ideal 10 mils. With a 300 dpi print head resolution, the normal line width is 3 pixels and with 600 dpi the normal line width is 6 pixels.
The appearance of the GOCA fill patterns is printer specific and may vary between different printer models. Applications printed on IBM printers may therefore look slightly different when they are printed on an other printer. The GOCA patterns are rather coarse structures, not as fine as a colour screen. If you combine a GOCA pattern with a GOCA colour, the result will look different on different printers.
GOCA is a fully resolution-independent architecture; except for the GOCA raster image. A GOCA image is similar to an old IM-Image, i.e. an uncompressed bitmap. Old GOCA images, created for either 240 or 300 dpi, can therefore only be printed with that resolution.