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sn#123360 filedate 1974-10-18 generic text, type C, neo UTF8
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C00001 00001
C00002 00002 USER PROGRAM DOCUMENTATION OCTOBER 1973
C00004 00003 INTRODUCTION:
C00008 00004 ESCAPE CHARACTER:
C00011 00005 FONT SELECT DELIMITERS:
C00015 00006 CARRIAGE CONTROL COMMMANDS.
C00017 00007 GRAPHICS FIGURES:
C00020 00008 TEXT JUSTIFICATION:
C00024 ENDMK
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USER PROGRAM DOCUMENTATION OCTOBER 1973
XIP - XEROX IMMEDIATE PRINT.
BRUCE G. BAUMGART
ABSTRACT:
XIP converts files of text, III buffers, graphics and video
into binary image rasters which are then printed on the XGP.
CONTENTS:
1. INTRODUCTION.
2. THE XGP RASTER.
3. THE ESCAPE CHARACTER.
4. FONT DECLARATION AND SELECTION.
5. INDIRECT FILES.
6. VECTORS AND GRAPHICS.
7. TEXT JUSTIFICATION.
This research was supported in part by the Advanced Research
Projects Agency of the Office of the Secretary of Defense under
Contract No. SD-183.
The views and conclusions contained in this document are those of
the author and should not be interpreted as necessarily representing
the official policies, either expressed or implied, of the Advanced
Research Project Agency or the United States Government.
INTRODUCTION:
XIP (pronouced "zip") converts files of text,
graphics and video into binary image rasters which are
then printed on the XGP. The following monitor commands will cause
the easy things to be done:
R XAP;@TEXT Will output a text file.
R XAP;⊗III Will output a III display buffer.
R XAP;⊗VIDEO Will output a TV picture.
XIP can output justified
text, III files, VIDEO files, and graphics. However unlike
PUB and POX; XIP does not make an intermediate DSK file, but rather
outputs immediately to the XGP.
The XIP input scanner has a command mode and a print mode.
The scanner rescans the monitor command line and starts taking
commands following the first semicolon.
When in command mode, the only character for
entering text mode is the right curly braket "}".
When in text mode, characters are usually printed into an XGP bit
raster. When in text mode, the only character for
entering command mode is the
right curly braket.
THE XGP PAGE RASTER:
_____________________________________________________________________
The logical page size is 1900 rows by 1260 columns. The
physical page size is 8.5" by 11". Although (49 words per row)*(2048
rows) = 100352 words; steps have been taken so that a 100K core
image is not required. The XGP is adjusted so that a single row or
column is one two hundreth of an inch wide; which is the same as
saying that there are 200 rows (or columns) to an inch. Now 2048
rows comes to 10.24 inch, and so there is three eighths inchs at the
top and the bottom of a XAP page which are inaccessible; also 1728
columns comes to 8.64 inchs so columns 0 to 15 are off the paper to
the left and columns 1680 to 1727 are off the paper to the right.
ESCAPE CHARACTER:
The XIP text escape character is left curly bracket. The
escape character terminates TEXT-MODE and returns control to the
command scanner which is COMMAND-MODE.
FONT SPECIFICATION:
F<chr> Select font number <chr>.
M<i><font file name>; Make font number <n> out of filename.
If a font select command "F" is done before a make font
command; then the following default font names will be used for the
corresponding font numerals:
Thus if you use the default fonts, you do not have to
declare any font file names; but if you do a "Make a font" command
the default filename is lost. In either event, a font is selected by
the capital-F command followed by a font numeral. Starting in text
mode, the sequence to change a font is "<tilde>F<numeral>" which
will select the desired font and re-enter text mode.
FONT SELECT DELIMITERS:
_____________________________________________________________________
The five pairs of characters: curly brackets, parentheses,
square brackets, horizontal horse shoes and angle-bars; are font
select delimiters. In command mode, the left delimiters are
declaration commands that take a font numeral argument. For example,
to declare subscripts under square brakets; an italics under curly
brakets; and Christmas under the angle-bars the following commands
would be used:
<tilde>[I;{C;≤E;F.
TEST: ≤OLDE ENGLISH CHRISTMAS≥ A[1,2] + B[X+B] = C[π/2]
TEST {TEST} TEST {TEST} TEST {TEST}
FONT CHARACTERISTICS: SIZE, STYLE, THICKNESS.
_____________________________________________________________________
The proliferation of font file names can be comprehended by
understanding the abbreviations for the features that are most
variable: size, style and thickness.
Most font file names include the numerals 13, 25, 30, or
40; which is the maximum height of the font in XGP units. An XGP
unit is 1/200 of an inch; the usual printer's measure is the "point"
which is a 1/72 of an inch; traditional type font sizes also are
refered to by the names given in the following table:
SIZE NAME POINTS XGP-UNITS CLOSEST XGP-SIZE
Diamond 4.5 12.50 13
Bourgeois 9 25 25
Small Pica 11 30.56 30
Pica 12 33.33
English 14 38.89 40
Columbian 16 44.45
Great Primer 18 50
The thickness of the font may be denoted by X-extra thick;
L-light; and I-italics.
INDIRECT FILE COMMANDS:
_____________________________________________________________________
@<filename>; Print text starting at XGP pen postion.
⊗<filename>; Place upper left of image at XGP pen position.
*<filename>; Place center of image at XGP pen position.
The "@" indirect command causes XAP
to start printing the contents of the specified text file.
The "⊗" and "*" indicate a binary picture file; video files are
distinguished from III display files because the first word of a
video file is [-1] and the first word of a III display file is
a positive word count. The "⊗" circle cross indirection places the
upper left most corner of the picture at the current XGP beam position;
while the "*" asterisk indirection places the center of the picture
at the current XGP beam position.
CARRIAGE CONTROL COMMMANDS.
---------------------------------------------------------------------
λ<integer> Set inter line spaceing to <integer> XGP lines.
VECTORS:
_____________________________________________________________________
V<row>,<column>; Absolute visible vector.
I<row>,<column>; Absolute invisible vector.
The row and column arguments are ASCII decimal numerals.
C<radius>,<arc-displacement>,<arc-length>; Circular arc.
R<radius1>,<arc-displacement>,<radius2>; Radial vector.
A<xlo>,<xhi>,<coef0>,<coef1>,...,<coefN>; Arc polynomial.
All arcs, that is <arc-displacement> and <arc-length> may be given in
radians, pi fraction expressions or degrees. If the absolute value is
greater than 2*π the quantity is assumed to be degrees.
GRAPHICS FIGURES:
_____________________________________________________________________
B<dx>; Square Box.
B<dx>,<dy>; Rectangular Box.
D<dx>; Square Diamond.
D<dx>,<dy>; Diamond.
C<radius>; Circle.
E<radius1>,<radius2>; Ellipse.
H<radius1>,<radius2>; Hyperbola.
C<radius>,<arc-length>; Circular arc.
E<radius1>,<radius2>,<x1>,<x2>; Elliptical arc
from X1 to X2 and Y ≥ 0.
H<radius1>,<radius2>,<x1>,<x2>; Hyperbolic arc
from X1 to X2 and Y ≥ 0.
O<arc>; Orientation about origin.
L<x>,<y>; Locate locus of orgin.
X<scalex>; XGP units per delta X unit.
Y<scaley>; XGP units per delta Y unit.
The "B" command with one real argument prints a square box
centered at the XGP beam position whoes half width (radius) is the
given number of XGP pixels. The "B" command with two arguments
prints a rectangle centered at the current XGP beam position. The
"Box" command as well as the "Diamond", "Circle", "Ellipse" and
"Hyperbola" commands do not change the pseudo XGP beam position. The
"D" diamond command works like "B" box taking one or two arguments;
if the second argument is missing it is assumed to be identical to
the first argument.
The "C" circle, "E" ellipse and "H" hyperbola are very much
alike because they are executed by the same mechanism. The circle
command with one argument draws a circle centered at the current XGP
raster position. The "E" and "H" commands with two arguments
automatically plot both the upper (greater than zero) and the lower
(less than zero) part of the appropriate conic centered at the
current beam position with the X-axis radius given by the first
argument and the Y-axis radius given by the second argument.
TEXT JUSTIFICATION:
_____________________________________________________________________
There are three text justification modes: justify automatic
carriage return linefeed mode; justify video mode; and justify
usual to fill to the left and right margins.
JA; Justify Automatic CRLF Mode.
Extra carriage returns are provided when the right margin
is exceeded; and extra form feeds are provided when the
bottom margin is exceeded.
JV; Justify Video Mode.
Characters "appearing" beyond the margins are lost.
JU; Justify Usual Mode.
Full normal left and right justification. A paragraph
is started with a TAB and terminated by one of five conditions:
1. CRLF CRLF; 2. CRLF TAB; 3. ESCAPE CHARACTER; 4. FORM FEED;
or 5. END OF FILE.