HP 2300 HP PCL/PJL reference - PCL 5 Comparison Guide - Page 63
Logical Operations and Transparency Interactions, Image_A = Temporary_ROP3 & Src & Pattern.
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Logical Operations and Transparency Interactions As described above, transparency modes operate in addition to logical operations. The logical operations in Table 2-5, Logical Operations (ROP3), on the following pages, are true only if source and pattern transparency (for white pixels) are explicitly set to opaque (?*v1N and ?*v1O). If source and/or pattern transparency modes are transparent (defaulted), the additional operations shown on the following page must be performed to achieve the final result. The four basic interactions are: • Case 1: Source and Pattern are opaque. Return ROP3 (Dest, Src, Texture). • Case 2: Source is opaque, Pattern is transparent. Temporary_ROP3 = ROP3 (Dest, Src, Texture). Image_A = Temporary_ROP3, & Not Src. Image_B = Temporary_ROP3 & Pattern. Image_C = Not Pattern & Src & Dest. Return Image_A | Image_B | Image_C • Case 3: Source is transparent, Pattern is opaque. Temporary_ROP3 = ROP3 (Dest, Src, Texture). Image_A = Temporary_ROP3 & Src. Image_B = Dest & Not Src. Return Image_A | Image_B • Case 4: Source and Pattern are transparent Temporary_ROP3 = ROP3 (Dest, Src, Texture). Image_A = Temporary_ROP3 & Src & Pattern. Image_B = Dest & Not Src. Image_C = Dest & Not Pattern. Return Image_A | Image_B | Image_C. ENWW Printer-Specific Differences 2-15