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HP LaserJet 4100 HP PCL/PJL reference (PCL 5 Printer Language) - Technical Ref - Page 155

Temporary vs. Permanent Fonts, Deleting Fonts

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Temporary vs. Permanent Fonts Once downloaded, a font is automatically designated as temporary. A temporary soft font is deleted from user memory during a printer reset or when a Typeface List, a Font Printout or a self-test is performed from the printer's control panel. A soft font can be designated as permanent to prevent the printer from deleting it during a printer reset. A soft font is designated as temporary or permanent by referencing its ID number and using the Font Control command (refer to "Font Control Command" later in this chapter). Note Both temporary and permanent fonts are deleted from user memory whenever the printer's power is turned off. Switching printer languages ("personalities"), changing resolution, or changing the Page Protection setting also deletes temporary and permanent fonts from user memory in some printers (refer to the appropriate printer User's Manual for specifics). An existing font is deleted when a new font with the same ID number is downloaded. The new font replaces the existing font (whether temporary or permanent). Deleting Fonts There are several mechanisms provided by PCL font management that delete soft fonts from user memory. These include commands to delete all soft fonts, all temporary soft fonts, or an individual soft font by reference to its font ID number (refer to the Font ID and the Font Control commands described on the following pages). EN Temporary vs. Permanent Fonts 9-3

Section	Page
Notice	4
Printing History	5
Trademark Credits	6
Inside This Manual	7
What You Can Learn From This Manual	7
Related Documentation	12
PCL 5 Comparison Guide	12
Intellifont Scalable Typeface Format	12
TrueType Font Files	12
Contents	13
Introduction to HPPCL	27
PCL Printer Language Architecture	28
What are Printer Commands?	29
Control Codes	29
PCL Commands	29
HP-GL/2 Commands	30
PJL Commands	30
Syntax of Escape Sequences	31
Two-Character Escape Sequences	31
Parameterized Escape Sequences	32
The Page	35
Logical Page	36
Printed Dots	37
PCL Coordinate System	38
Units of the PCL Coordinate System	39
PCL Units	39
Decipoints	39
Columns & Rows	39
Printer Internal Units	39
HP-GL/2 Picture Frame	40
Printable Area	41
The Print Environment	45
Factory Default Environment	46
User Default Environment	50
Modified Print Environment	51
Resetting the Print Environment	52
Printer Reset	52
Cold Reset	53
PCL Job Control Commands	55
Printer Reset Command	56
Universal Exit Language Command	57
Number of Copies Command	58
Simplex/Duplex Print Command	59
Left Offset Registration Command	61
Top Offset Registration Command	62
Duplex Page Side Selection Command	64
Job Separation Command	65
Output Bin Selection Command	66
Unit of Measure Command	67
Page Control Commands	71
Page Size Command	72
PAPER SOURCE COMMAND	74
Logical Page Orientation Command	75
Print Direction Command	79
Text Area	81
Left Margin Command	83
Right Margin Command	84
Clear Horizontal Margins Command	85
Top Margin Command	86
Text Length Command	88
Perforation Skip Command	89
Horizontal Motion Index (HMI) Command	90
Vertical Motion Index (VMI) Command	92
Common VMI Settings	93
Line Spacing Command	94
Cursor Positioning	95
Absolute vs. Relative Cursor Positioning	96
Cursor Positioning Units	97
PCL Units	97
Decipoints	98
Columns & Rows	98
Horizontal Cursor Positioning (Columns) Command	99
Horizontal Cursor Positioning (Decipoints) Command	100
Horizontal Cursor Positioning (PCL Units) Command	101
Horizontal Cursor Positioning Control Codes	102
CR - Carriage Return	102
SP - Space	102
BS - Backspace	103
HT - Horizontal Tab	103
Vertical Cursor Positioning (Rows) Command	104
Vertical Cursor Positioning (Decipoints) Command	105
Vertical Cursor Positioning (PCL Units) Command	106
Half-Line Feed Command	107
Vertical Cursor Positioning Control Codes	107
LF - Line Feed	107
FF - Form Feed	107
Line Termination Command	108
Push/Pop Cursor Position Command	109
Fonts	111
Font Sources	112
Symbol Set	113
Spacing	114
Pitch	115
Height	115
Style	116
Stroke Weight	116
Typeface Family	117
Orientation	118
Bitmap Fonts and Scalable Typefaces	119
Internal Fonts	121
Special Effects	121
PCL Font Selection	123
Primary and Secondary Fonts	127
Font Resolution	127
Symbol Set Command	128
Example	129
7-bit ISO Symbol Sets	130
Spacing Command	131
Example	131
Pitch Command	132
Example	133
Height Command	134
Example	135
Style Command	136
Example	137
Stroke Weight Command	138
Example	139
Typeface Family Command	140
Example	141
Orientation	142
Font Selection Examples	143
Bitmap, Fixed-Spaced Font	143
Scalable, Proportional-Spaced Font	144
Summary of Font Selection by Characteristic	145
Font Selectionby ID Command	148
Examples	149
Select Default Font Command	149
HP-GL/2 Font Selection	149
Transparent Print Data Command	150
Example	150
Underline Command	151
Font Management	153
Downloading Soft Fonts	154
Temporary vs. Permanent Fonts	155
Deleting Fonts	155
Font ID Command	156
Example	156
Font Control Command	157
Examples	157
Font Management Example	159
Unbound Scalable Fonts	160
Bound and Unbound Fonts	160
Font Selection and Unbound Fonts	160
User-Defined Symbol Sets	167
Symbol Set ID Code Command	168
Define Symbol Set	170
Header Size (UI)	171
Encoded Symbol Set Designator (UI)	172
Format (UB)	172
Symbol Set Type (UB)	172
First Code (UI)	173
Last Code (UI)	173
Character Requirements (Array of UB) and character requirement	173
Symbol Map (Array of UI)	177
Symbol Set Control Command	178
User-Defined Symbol Set Examples	179
Unicode Symbol Index Example	179
MSL Symbol Index Example	180
Soft Font Creation	183
Font Classifications	184
Coordinate System	186
Bitmap Fonts	186
Intellifont Scalable Fonts	186
TrueType Scalable Fonts	187
Font Header Command	188
Font Header Format	188
Data Types	196
Font Descriptor Size (UI)	197
Header Format (UB)	197
Font Type (UB)	197
Style MSB (UI)	198
Baseline Position (UI)	200
Cell Width (UI)	200
Cell Height (UI)	200
Orientation (UB)	201
Spacing (B)	202
Symbol Set (UI)	202
Pitch (UI)	203
Height (UI)	204
xHeight (UI)	204
Width Type (SB)	205
Style LSB (UB)	205
Stroke Weight (SB)	205
Typeface (UB)	206
Serif Style (UB)	209
Quality (UB)	210
Placement (SB)	210
Underline Position (Distance) (SB)	211
Underline Thickness (UB)	211
Text Height (UI)	211
Text Width (UI)	211
First Code (UI)	212
Last Code / Number of Characters (UI)	212
Pitch Extended (UB)	212
Height Extended (UB)	213
Cap Height (UI)	213
Font Number (ULI)	214
Font Name (ASC16)	215
X Resolution (UI)	215
Y Resolution (UI)	216
Scale Factor (UI)	216
Master Underline Position (SI)	216
Master Underline Thickness (Height) (UI)	216
Font Scaling Technology (UB)	216
Variety (UB)	217
OR Threshold (UI)	217
Global Italic Angle (SI)	217
Global Intellifont Data Size (UI)	217
Global Intellifont Data	217
Character Complement (Array of UB)	217
Checksum	221
Copyright	221
Segmented Font Data (Format 15)	221
Font Header Examples	225
Character Definitions	230
Character Code Command	231
Character Definition Command	232
Character Descriptor Formats	233
Character Descriptor and Data Format for PCL Bitmap Fonts	233
Character Descriptor and Data Format for Intellifont Scalable Fonts	242
Character Descriptor and Data Format for TrueType Fonts	247
Character Definition Examples	252
Macros	257
Macro Creation	259
Macro Invocation	260
Temporary / Permanent Macros	261
Deleting Macros	262
Macro ID	262
Example	262
Macro Control	263
Example	264
Macro Control Example	265
The PCL Print Model	267
Command Sequence	271
Source Transparency Mode Command	272
Pattern Transparency Mode Command	273
Pattern ID (Area Fill ID) Command	274
Select Current Pattern Command	278
User-Defined Pattern Graphics	279
User-Defined Pattern Implementation	279
User-Defined Pattern Command	282
Format (Byte 0)	283
Continuation (Byte 1)	283
Pixel Encoding (Byte 2)	283
Reserved (Byte 3)	284
Height in Pixels (Bytes 4 and 5)	284
Width in Pixels (Bytes 6 and 7)	284
Pattern Image	284
Master X Resolution (UI)	284
Master Y Resolution (UI)	284
User-defined Pattern Example	285
Set Pattern Reference Point Command	288
Pattern Control Command	289
PCL Rectangular Area Fill Graphics	291
Rectangular Area Fill Procedure	291
Horizontal Rectangle Size (Decipoints) Command	293
Horizontal Rectangle Size (PCL Units) Command	293
Vertical Rectangle Size (Decipoints) Command	294
Vertical Rectangle Size (PCL Units) Command	294
Pattern ID (Area Fill ID) Command	295
Fill Rectangular Area Command	299
Pattern Transparency for Rectangular Area Fill	301
Rectangular Area Fill Examples	303
Pre-defined Pattern Examples	303
User-defined Pattern Example	307
Raster Graphics	309
Raster Graphics Command Sequence	312
Raster Graphics Resolution Command	314
Raster Graphics Presentation Mode Command	316
Raster Height Command	319
Raster Width Command	321
Start Raster Graphics Command	322
Raster Y Offset Command	323
Set Compression Method Command	324
Unencoded (Method 0)	324
Run-length Encoding (Method 1)	324
Tagged Image File Format Encoding (Method 2)	325
Delta Row Compression (Method 3)	328
Example: Delta Row Compression	332
Adaptive Compression (Method 5)	333
Transfer Raster Data Command	337
End Raster Graphics Command	338
Raster Graphics Example	339
Status Readback	343
Memory Status Request	344
Entity Status	345
Status Response	347
Status Response Syntax	348
Set Status Readback Location Type Command	350
Set Status Readback Location Unit Command	351
Inquire Status Readback Entity Command	352
Entity Status Responses	353
Font Response	353
Font Extended Response	357
Macro Response	358
User-Defined Pattern Response	359
Symbol Set Response	360
Entity Error Codes	361
Free Space Command	363
Memory Status Response	364
Memory Error Response	365
Flush All Pages Command	366
Echo Command	367
Echo Response	368
Status Readback Programming Hints	369