HP LaserJet 4100 HP PCL/PJL reference (PCL 5 Printer Language) - Technical Ref - Page 187

Figure 21-24Fill Rectangle Relative The only difference between the RR command and the ER (Edge Relative Rectangle) command is that the RR command produces a filled rectangle, and ER, an outlined one. The RR command clears the polygon buffer and then uses it to define the rectangle before drawing. A rectangle requires enough buffer space to hold five points. The following example uses RR with three different fill types (refer to the FT command description) to create rectangles such as those you might use in a bar chart. The rectangles in the right bar are edged using the ER command. Table 21-24 Example: Using the RR Command with Different Fill Types ?E Reset the printer. ?%0B Enter HP-GL/2 mode. IN; Initialize HP-GL/2 mode. SP1; Select pen number 1. Even though there is no physical pen, the SP command must be used to enable printing. PA400,400; RR400,800; Specify absolute plotting and move to location (400,400). Fill a rectangle with the default fill (black), with (400,400) as the lower left corner and the upper right corner 400 plu to the right and 800 plu up from there. EN RR, Fill Rectangle Relative 21-43