HP 1200 HP PCL/PJL reference - PCL 5 Comparison Guide - Page 62

The print model allows logical operations, such as AND, OR, XOR, NOT, to be performed on source, texture, and destination images. Transparency modes and Logical Operation must be specified before printable data is sent. Operators • Source Transparency (specified before logical operation; default is transparent) • Pattern Transparency (specified before logical operation; default is transparent) • Logical Operators (default is Texture OR Source) Operands • Source objects: character cell, raster image, rule, HP-GL/2 vectors and polygons • Texture: pattern mask • Destination: current page definition Assuming three bits per pixel, the following diagram shows the print model process. Note The Logical Operation command (?*l#O) provides 255 possible logical operations. All of these logic operations map directly to their ROP3 (raster operation) counterparts (see the Microsoft Document, Reference, Volume 2, Chapter 11, Binary and Ternary Raster Operation Codes). The logical operations were defined by Microsoft Windows for an RGB color space (a "1" is white and a "0" is black). 2-14 Printer-Specific Differences ENWW