Xerox 4213 manual Graphic Window, Other characteristics, Scan direction for raster graphics

XES COMMAND LANGUAGE MODE

Other characteristics

With the Graphic Window command, you determine:

·Whether or not the window will be magnified to appear larger on the printed output than its actual size; and, if so, by how much. You can select magnification for a window when you want a graphic to cover a larger area on the page but do not want to use the memory required for a large window. Magnifying a window, however, reduces its resolution.

·What type of graphics dataÐraster, vector, or macroÐthe window will contain.

·Whether the graphics will be reversed. When graphic images are reversed, a black image on a white background becomes a white image on a black background and vice versa.

·The location and size of the window, given in two pairs of x- and y-coordinates, as shown in figure 2-19. The first coordinates, X and Y, set the location of the window's origin

on the page. The second coordinates, Sx and Sy, set the size of the window. The unit of measure is the pixel.

Scan direction for raster graphics

The x-axis and y-axis of a graphic window are not related to those of the physical page. The scan direction for a graphic window always runs along its x-axis (from X to Sx). Raster data fills the window in this direction. This differs from the scan direction of the page, which runs along the page's y-axis. Figures 2-19 and 2-20 show how the scan direction of the page differs from that of the graphic window.

In a job using raster data, the Graphic Window command is followed immediately by the sixel encoded bitmap, which is sent to the printer from the host.

When defining a window for raster graphics, ensure that the number of pixels you enter for its size along the x-axis is a multiple of eight. You do not need to made a similar calculation for the window's y-direction; the printer does this automatically.

Graphic Window

Purpose Defines an area on the page for graphics.

XEROX 4213 LASER PRINTER PROGRAMMER REFERENCE 2-81