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Excellence v1.10 disk 2.adf
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Preferences.Readme
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1988-03-25
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V1.3 Preferences
----------------
The new Preferences program has a 2nd printer graphic screen.
The gadgets and their descriptions are as follows:
Gadget Description
------ -----------
Density 1-7 - the user density is SPECIAL_DENSITY1 thru SPECIAL_DENSITY7
and it OVERRIDES whatever density the application program
has selected. You can use this to assure a certain
density. The lower the density the faster the print times
(on those printers with multiple densities).
Center Image turns on/off horizontal centering of the picture on the
paper. This options overrides the Left Offset value.
Scaling Fraction - normal scaling (default).
Integer - every dot on the screen is guarenteed to appear as an
even number of dots on the printer both in the x and
y dimension. ie. if your source picture is 320x200,
the printed picture width will be either 320, 640,
960, etc. dots wide and 200, 400, 600, etc. dots
high. THIS IS THE OPTION TO USE WHEN YOU ARE TRYING
TO PRINT A PICTURE THAT CONTAINS THIN VERTICAL AND
HORIZONTAL LINES (LIKE A GRID). The actual size of
the printed picture will be the size you asked for
scaled up/down to the nearest multipe of the width
and height of the picture. When you do this you
completely override the aspecting feature of the
printer device. ie. it is possible to get a
(slightly) distorted (non aspect ratio correct)
picture. THIS OPTION IS ALSO USEFULL IF YOU ARE
PRINTING OUT BIT-IMAGE TEXT (LIKE IN NOTEPAD) AS
THE FONTS WONT BE DISTORTED DUE TO FRACTIONAL SCALING.
Color Correction - this option selectively tries to match all shades of
either red (R), green (G), or blue (B) from the screen
to the printer. Initially the printer device can
print all the 4096 colors of the Amiga on a printer.
However, as color correction is applied the total
number of printed colors is reduced to a low of 3172.
To see the effect of this option, print out a picture
with solid red, green, and blue shades twice, once
with this option on, and once with it off. Now compare
the two pictures with the screen display; the results
should be obvious.
LeftOffset - offsets the printed picture horizontally in increments
of tenths of an inch. The 'Center Image' option (above)
disables this option.
Dithering Ordered - color intensities on the printer are formed using
an 'ordered' dither method. This is the default.
HalfTone - color intensities on the printer are formed
using a 'halftone' dither method. This
technique is similar to the one used in
newspapers and comic books and works best on
high density printers (> 150 dots/inch).
F/S - color intensities on the printer are formed using the
'Floyd-Steinberg' error distribution method. This
option (currently) slows down the printing by a factor
of two as it has to analyse each pixel before printing.
Note that this option automatically turns off
anti-aliasing as they can not be used in conjunction
with each other.
MaxWidth - limits the width of the printed picture in tenths / inch.
MaxHeight - limits the height of the printed picture in tenths / inch.
<-Limits-> - this gadget determines how the above 'limits' are to be
interpreted as follow:
IGNORE - the limits are to be IGNORED. The printed picture's
size is bounded by the old standbye of:
width =
(right margin - left margin + 1) / chars per inch.
height =
lines per page / lines per inch.
This option is here to remain compatible with
pre V1.3 software and is the default.
BOUNDED - the printed picture's size is BOUNDED by
MaxWidth and MaxHeight. ie. if you want the
printed picture to be no bigger than 4 x 5
(but it could be smaller), set MaxWidth to 40,
MaxHeight to 50, and select BOUNDED. This option
is here so that you don't have to change the
text settings (margins, lines per page, etc.)
everytime you do a graphic print.
ABSOLUTE - MaxWidth and MaxHeight are taken to be ABSOLUTE
values. The printed picture's size is no
longer bounded rather it will absolutely be
the size specified here. ie. If you want the
printed picture to be exactly 4.0 x 5.0 inches;
set MaxWidth to 40, MaxWidth to 50, and select
ABSOLUTE. When you do this you completely
override the aspecting feature of the printer
device. ie. it is possible to get a (very)
distorted (non aspect ratio correct) picture.
Setting one (but not both) of the dimensions to
zero aspect ratio corrects that dimension. ie.
If you set MaxWidth to 40 and MaxHeight to 0,
then the printed picture will be 4.0 inches wide
and as tall as it needs to be in order to be
aspect ratio correct. If both of the dimensions
are zero then the printed picture will be the
printer's maximum dots wide and as tall as it
needs to be in order to be aspect ratio correct.
PIXELS - MaxWidth and MaxHeight are taken to be absolute
values in printer PIXELS and not tenths of an inch!
The same rules for 'ABSOLUTE' (MaxWidth = 0 and
MaxHeight = 0) apply here.
MULTIPLY - MaxWidth and MaxHeight are used to MULTIPLY the
source picture's width and height. ie. If you
specified a MaxWidth of 2 and a MaxHeight of 4,
the printed picture would be 2x the source picture's
width pixels wide and 4x the source picture's
height pixels high. Thus if the source picture
were 320 x 200, the printed picture would be
640 (320 x 2) pixels wide and 800 (200 x 4) pixels
high. The same rules for 'ABSOLUTE' (MaxWidth = 0
and MaxHeight = 0) apply here. Ths same benefits
that apply to INTEGER scaling are valid here.
Anti-alias - attempts to smooth diagonal lines. This option (currently)
slows down the printing by a factor of two as it has to
analyze each pixel (and its closest neighbours) before
printing. This option is best suited for use with programs
that do graphic dumps of text (like ProWrite, PageSetter,
CityDesk, Publisher 1000, NotePad, etc.).
Note that this option automatically turns off
Floyd-Steinberg dithering (and selects Ordered dithering)
as they can not be used in conjunction with each other.