NP Number of Pens | HP L 5 instruction

NP (Number of Pens)

The NP command resizes the palette after the IN or ?*v#W commands.

NP [n;] or NP[;]

Parameter	Format	Functional	Parameter
		Range	Default

n	clamped	2 to 32768	device-dependent*
	integer

*The default palette size for the HP color printers is 8.

•n — the parameter n denotes the size of the HP-GL/2 palette, where n is a power of two. If n is not a power of two, the next larger power of two is used. The palette is an array of virtual pens, each having an associated color value and an associated width. Pen colors are defined in terms of RGB components using the PC command. Widths are established using the PW and WU commands. A pen is selected with the SP command.

The maximum value for n is device-dependent, but is greater than or equal to the number of distinct colors the printer is able to produce. If n is larger than that maximum, the maximum-sized palette is allocated. If n < 2, error 3 is set and the command is ignored.

The “NP;” command defaults the palette size. Receipt of this command does not default pen colors and/or widths for existing pen values. For example, if the palette size is initially 8 and is decreased to 4, pen colors and widths for the new palette are retained from the colors and widths of the first 4 pens of the old palette. If the palette size is increased from 8 to 16, the colors and widths for the first 8 pens remain the same, and the colors and widths of the remaining pens are defaulted. The pens are defaulted in accordance to how the palette was created (either CID or Simple Color palettes).

EN	Color Vector Graphics (HP-GL/2) 7-17

Image 181

HP L 5 manual NP Number of Pens

Contents

Page Page PCL 5 Color Technical Reference Manual Trademarks Copyright License What You Can Learn From This Manual Inside This Manual Manual Organization Color Vector Graphics HP-GL/2 Appendix C. Using Palettes Color LaserJet, 5, 5M, DeskJetIndex PCL 5 Printer Language Technical Reference Manual Related DocumentsPCL 5 Comparison Guide Printer Job Language Technical Reference Manual Contents Modifying Output Color Raster Graphics Appendix B Using Color Modes Color LaserJet, 5, 5M, DeskJet Index Contents Introduction Color Printing Overview Working with color documents PCL 5 Color Concepts Color Specifications and Color SpacesColor Page HP’s ICC profiles are available through normal HP software Palettes and Color Selection PCL 5 Color ModePCL 5 Color Graphics Context Pixels and Pixel Encoding PCL 5 Raster Images Row Plane Red Well-Behaved Raster Color Printing Overview Simple Color Mode Black-and-White Mode Default HP-GL/2 Imaging Mode PCL Imaging Mode Simple Color Command Simple Color ModeDefault Range ? *r#U Plane RGB value = Single Plane value =Plane CMY value = Index Color Configure Image Data CID Command PCL Imaging Mode?*v6W b0 b1 b2 b3 b4 b5 Byte Value Color Space Byte 0 Color Space Value Pixel Encoding Restrictions Mode Byte 1 Pixel Encoding Mode PEM 0 Indexed by Plane Example PEM 1 Indexed by Pixel Mode 2 Direct by Plane R7-r0 G7-g0 Byte 2 Number of Bits per Index Bits/Index Indices/Byte Bytes 3, 4, and 5 No. of Bits for Components 1, 2, HP-GL/2 Imaging Mode Using Color Modes Using Palettes Page Saving the Palette Push/Pop Palette Command? *p#P Page Palette Management by ID ?&p#S Select Palette CommandPage ?&p#I Palette Control ID ?&p#C Palette ControlPage Simple Color Palettes Plane CMY value = Device RGB and sRGB Palettes CID Color PalettesBits/Index = Bits/Index = 3 through Bits/Index = Color Device CMY PalettesBits/Index = Bits/Index = 3 through Two Pens HP-GL/2 PalettesFour Pens Pen Number Color Eight Pens Foreground Color Foreground Color Command? *v#S Color raster images Color Component One Programming Color PalettesColor Component Two ? *v#A Assign Color Index Color Component Three?*v#C ?*v#I Modifying Output Color Halftone Render Algorithms Render Algorithm CommandDevice Best Dither ? *t#J Monochrome Printing Monochrome Print Mode Command?&b#M Deviceid Driver Configuration CommandFunctionindex Select Treatment Screen Match Treatment Command Other Color LaserJet Default = Finish Mode Command?&b#F PCL Print Model PCL Print Model Opaque and Transparency Modes Page Effect of Transparency Modes on Images Operation Comments Command Sequence Default Source Transparency Mode Command? * v # N ? * v # O Pattern Transparency Mode Command Definitions Logical Operations Operands OperatorsOperation Logical Operations and the Print Model Logical Operations and Transparency Interactions ?*l # O Logical Operation CommandRoprgb 252 Texture Source Destination ROPs in the RGB Color Space ROPs in the CMY Color Space CMY ROP Truth Tables Using a ROP Example Table of Logical Operations Logical Operations ROP3 Boolean Input Value Function Function Input Value Logical Operations ROP3 Boolean Logical Operations ROP3 Boolean Logical Operations ROP3 Boolean Logical Operations ROP3 Boolean Pixel Placement Pixel Placement Pixel Placement Variations ?*l # R Pixel Placement Command Patterns for Text and Raster Images Filling with PatternsPatterns for Rectangles HP-GL/2 Patterns Selecting User-Defined patterns1 Pattern ID Area Fill ID Command Shading Patterns Cross-Hatch Patterns ? * v # T Select Current Pattern Command User-Defined Pattern Graphics Using User-Defined Patterns How the Printer Tiles a Pattern 10 Pattern Layout Across the Printable Area Pattern Reference Point 11 Moving Pattern Reference Point for Pattern Filling Format Byte Download Pattern Command Pixel Encoding Byte Continuation ByteReserved Byte Height in Pixels Bytes 4 User-defined Pattern Example Page Previous example, the raster data code is presented ? * p # R Set Pattern Reference Point Command ? * c # Q Pattern Control Command Rectangular Area Fills Rules Horizontal Rectangle Size Decipoints Horizontal Rectangle Size PCL Units? * c # a ? * c # H Vertical Rectangle Size Decipoints Vertical Rectangle Size PCL Units? * c # B ? * c # ? * c # P Fill Rectangular Area Printer Language Technical Reference Manual for logical Pattern Transparency for Rectangular Area Fill 12 Effect of Transparency Modes on Rectangular Areas Solid Fill Black/White Rectangular Fill Examples 13 Solid Fill Example Shaded Fill Page PCL Print Model Raster Graphics Page Image Type Number Bits per Components Raster Area PCL 5 Color Raster GraphicsPage Well-Behaved Raster Command Sequence Raster Graphics Command Sequence Emphasis in the previous command sequence is that the Raster ? * t # R Raster Graphics Resolution Command Raster Graphics Expansion at 300 dpi Default = Range = 0 Raster Graphics Presentation Mode Command? * r # F Raster Graphics Presentation Mode for Portrait Orientation Raster Graphics Presentation Mode for Landscape Orientation ? * r # T Source Raster Height Command Maximum Raster Height ? * r # S Source Raster Width Command Maximum Raster Width ? * r # a Start Raster Graphics CommandPage ? * b # Y Raster Y Offset Command Set Compression Method Command Run-length Encoding Method Unencoded MethodTagged Image File Format Encoding Method ? * b # M # of Bytes Binary value Decimal value 0000 127 0111 Unencoded Examples Run-length and Tiff Compression Delta Row Compression Method Command byte1 to 8 Replacement bytesRun-length Encoding Tiff EncodingPage Seed Row Repeating a Row Printing a Zeroed Row Setting the Seed Row to ZeroExample Delta Row Compression 11111111 Row 00001111 11111111 10101010 Adaptive Compression Method Value Compression Operation Duplicate Row Empty Row Comparison Guide for specifics Adaptive Compression Operation Hints Transfer Raster Data Commands Transfer Raster Data by Plane Transfer Raster Data By Row/Block Command ?*b2m3W binary data Byte Counts and the Tiff v4.0 Compression Mode ? * r C End Raster Graphics Command Raster Scaling Resolution ScalingArbitrary Scaling Destination Raster Height Destination Raster Width? * t # H ? * t # Raster Graphics Example Page Page Example of Raster Graphic Image Data Color Raster Graphics Example PCL Command Description Command Arguments Raster Graphics Raster Graphics Color Vector Graphics HP-GL/2 ?%#B Enter HP-GL/2 ModePage Default Settings when Entering HP-GL/2 Page MC Merge Control Default Pixel Combinations Desired Destination Values Page Logical Operations ROP3 Boolean Input Value Function Logical Operations ROP3 Boolean Logical Operations ROP3 Boolean Logical Operations ROP3 Boolean Logical Operations ROP3 Boolean PC Pen Color Parameter Format Functional Range Default Yellow Shading Fill Type command FT10, the shading levels are NP Number of Pens Page CR Color Range PP Pixel Placement Pixel Placement Mode Clamped integer Grid Intersection PP, Pixel Placement CommandParameter Format Functional Color Printing Overview Color LaserJet, 5, 5M DeskJet Page Color Concepts Raster ModePalettes Raster Color vs. Non-Raster Color Black and White References Device-Dependent vs. Device-Independent Color Scenario White Reference Black Reference Color Selection Encoding by Plane Pixel Encoding Encoding by Pixel Color ModesC4 c3 c2 c1 Planar Encoding Pixel Encoding Device-Independent Color Spaces Device-Dependent Color SpacesPage Device-Dependent Color Device-Independent ColorDevice-Independent Color Color Matching Color Lookup Tables Color Appearance Matching Illumination Models Non-Raster Color vs. Raster Color Processing Color DocumentsColor Raster Data Marking Primitives Color Processing Functions Color Printing Overview Color LaserJet, 5, 5M, DeskJet Using Color Modes Color LaserJet, 5, 5M DeskJet Introduction HP-GL/2 Imaging Mode Simple Color Mode Simple Color palettes are shown below ?*v#Wbinary data Common 6-Byte Header Byte 15 MSB LSB Color space Ubyte Pixel encoding modeBits/index Bits/primary #1 Bits/primary #2 Bits/primary #3 Byte Value Pixel Encoding Mode Restrictions Mode 0 Indexed by Plane Mode 1 Indexed by Pixel Mode 2 Direct by Plane Bytes are always 1 for this Byte 3 Number of Bits for Primary #1 Byte 5 Number of Bits for Primary #3 Byte 4 Number of Bits for Primary #2 Short Form of CID Command Configure Image Data Data Range Scaling Device RGB Long Form Long Form of CID Command Configure Image DataByte 15 msb Lsb CIE L*a*b* Long Form Device CMY Long Form Byte 15 msb Lsb Sign Exponent Fractional Portion Colorimetric RGB Long Form Byte 15 msb Lsb Luminance-Chrominance Long Form Byte 15 msb Lsb Byte 15 msb Lsb Device RGB or Device CMY Examples Using the CID Command Non-Linear Smpte RGB, 2.2 Gamma, 1.0 Gain CIE L*a*bNon-Linear Sony Trinitron YUV Chrominance-Luminance with Sony Trinitron YUV Chrominance-Luminance Color Space HP-GL/2 Imaging Mode Using Palettes Color LaserJet, 5, 5M DeskJet Page Saving the Palette Page Palette Management by ID Select Palette Command Page Palette Control ID Palette Control Page Using Palettes Color LaserJet, 5, 5M, DeskJet C-11 Plane CMY value = Device RGB Palettes Bits/Index = 3 through Device CMY and Device-Independent Palettes HP-GL/2 Palettes Using Palettes Color LaserJet, 5, 5M, DeskJet C-17 ?*v#S Foreground Color Command Color raster images Color Component Two Color Component One?*v#A ?*v#B Assign Color Index Color Component Three Using Palettes Color LaserJet, 5, 5M, DeskJet Modifying Output Color Color LaserJet, 5, 5M DeskJet Page ?*t#J Snap to Primaries Error DiffusionSnap Black to White, Colors to Black Monochrome Rendering Ordered Dither and Clustered Ordered DitherUser-Defined Dithering Non-Continuous Tone Algorithms User-Defined Dithers Download Dither Matrix Command Byte 15 msb Lsb Number of Planes FormatHeight and Width Data Bytes Multiple Dither Matrices Example Byte 15 msb Lsb Color Lookup Tables Color Lookup Tables Command Figure D-1 Color Lookup Tables Byte 15 msb Lsb Value Color Space Gamma Correction Gamma Correction Command?*t#I Viewing Illuminant Viewing Illuminant Command Illuminant Chromaticity Monochrome Print Mode Command Function Description Argument Range Index Value Printer Color LaserJet printer Saturation LightnessScaling Process Blue No AdjustmentTransparency Out of Gamut Download Color Map Setting Description MapID Device Dependent Setting Description MapID Setting Description MapID Device-Independent Index Index-2 Index-3 Index-4 Index-5 Index-6