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-
- V1.3 Preferences
-
- by Eric Cotton and David Berezowski
-
-
- The Preferences program for the V1.3 Workbench has a number of additions to
- support new features of this release, including extended printer support.
-
-
- General
-
- There is now a Preferences drawer. Within the drawer are icons for
- Preferences, Pointer, Printer, and Serial. The Preferences icon is for the
- Preferences program itself. Double-clicking runs Preferences much as before.
- Pointer, Printer, and Serial are project icons; the DEFAULT TOOL of each is
- Preferences. The TOOL TYPES specify the preference screen with which
- Preferences is to begin. The format is "PREFS=" immediately followed by
- "pointer", "printer", or "serial". For instance the
- TOOL TYPES of the Serial icon is "PREFS=serial". Double-clicking on the icon
- opens Preferences with the serial preference screen.
-
- Preferences now accepts command line arguments. The format is as follows:
-
- Preferences [POINTER | PRINTER | SERIAL]
-
- The argument specifies the screen to display.
-
-
- Selecting Save automatically updates the battery backed-up clock, if present,
- with the new date and time.
-
- The CLI On/Off option has been eliminated. Henceforth, the icon for the
- Command Line Interface (CLI) will always appear in the System drawer (unless
- deleted by the user).
-
-
- Change Printer
-
- The Graphic Select gadget has been replaced by two new gadgets: Graphic 1
- and Graphic 2.
-
- The new Graphic 1 gadget is equivalent to the V1.2 Graphic Select gadget and
- is used to request the first of two printer graphic Preferences screens.
-
-
- Graphic 1
-
- The Graphic 1 screen is selected by clicking on the corresponding gadget in
- the Change Printer screen.
-
- There is a new Print Shade selection: Gray Scale2. This shade is for printing
- pictures designed using the A2024 Monitor (which supports a maximum of seven
- shades of gray).
-
-
- Graphic 2
-
- Selected by clicking the Graphic 2 gadget in the Change Printer screen, this
- new Preferences screen supports extended printer graphics features. The
- various gadgets are as follows:
-
- Smoothing [ON/OFF] - attempts to smooth diagonal lines.
- This option is best suited for use with programs that do graphic dumps
- of text (like ProWrite, PageSetter, CityDesk, Publisher 1000, NotePad,
- etc.). This technique incurs an approximate 2:1 speed penalty on
- printing. Note: Floyd-Steinberg dithering cannot be used in conjunction
- with Smoothing. If F-S is enabled when turning on Smoothing the dithering
- mode will change to Ordered. Default is OFF.
-
- Left Offset - horizontally offsets the printed picture.
- This option effectively sets up a left margin. The offset can be entered
- in increments of tenths of an inch. The Center option (below) disables
- Left Offset. Default is 0.0 inches.
-
- Center [ON/OFF] - horizontally centers the printed picture.
- This option overrides the Left Offset value. Default is OFF.
-
- Density [1 through 7] - selects graphics print density.
- The lower the density the faster the print time (on those printers with
- multiple densities). Refer to specifications of the V1.3 Printer Drivers
- for a description of densities supported by each individual printer.
- Default is 1.
-
- Color Correct R/G/B - tries to better match screen colors to printer colors.
- This option selectively tries to match all shades of either red (R),
- green (G), or blue (B) from the screen to the printer. Without color
- correction, 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 (308 per RGB). To
- see the effect of this option, printout a picture with solid red, green,
- and blue shades twice; first with this option on, and then with it off.
- Now compare the two pictures with the screen display. The shades of the
- color corrected picture should more closely represent those displayed on
- your monitor. Default is no color correction (R, G, and B not selected).
-
- Dithering [Ordered/Halftone/F-S] - sets dithering mode.
- Note: when a Shade of 'Black and White' is selected (from the Graphic 1
- screen), changing the dither method has no effect on the printout as
- B&W shading does no dithering. Default is ORDERED.
-
- Ordered - Color intensities on the printer are formed using an ordered
- dither method. Ordered dithering produces shades on the printer using
- an ordered pattern of dots.
-
- 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. It works best on high density printers (greater than
- 150 dots per inch).
-
- F-S - Color intensities on the printer are formed using the Floyd-Steinberg
- error distribution method. This option incurs an approximate 2:1 speed
- penalty on printing. Note: Selecting this option automatically turns
- off Smoothing as they can not be used in conjunction with each other.
- It works best on high density printers (greater than 150 dots per inch).
-
- Scaling [Fraction/Integer] - selects scaling method. Default is FRACTION.
-
- Fraction - Normal scaling is performed.
-
- Integer - Every dot on the screen is guaranteed to appear as an even
- number of dots on the printer in both the x and y dimensions. For
- example, if the source picture is 320 x 200, the printed picture width
- will be either 320, 640, 960, etc. dots wide and 200, 400, 600, etc.
- dots high. This option should be selected when 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 requested size scaled
- up or down to the nearest multiple of the width and height of the
- picture. Integer scaling completely overrides the aspecting feature of
- the printer device. Thus it is possible to get a slightly distorted
- (non-aspect ratio correct) picture. This option is also useful for
- printing out bit-image text (as in Notepad) since the fonts will not be
- distorted due to fractional scaling.
-
- Width Limit - limit the width of the printed picture. Default is 0.
- The width can be limited in tenths / inch, pixels or a multiplication
- factor. See Limits below.
-
- Height Limit - limits the height of the printed picture. Default is 0.
- The height can be limited in tenths / inch, pixels or a multiplication
- factor. See Limits below.
-
- <- Limits - determines how the Width and Height limits are interpreted.
- Default is IGNORE.
-
- Ignore - The limits are to be ignored. The printed picture's size is
- bounded by:
-
- width = (right margin - left margin + 1) / characters per inch.
- height = lines per page / lines per inch.
-
- This option is the default and is included to remain compatible with
- pre V1.3 software.
-
- Bounded - The printed picture's size is bounded by Width Limit and Height
- Limit. For example, if the printed picture should be no bigger than
- 4.0 x 5.0 inches (but it could be smaller), set MaxWidth to 40, MaxHeight
- to 50, and select Bounded. This option is provided so that the text
- settings (margins, lines per page, etc.) need not be changed every time
- a graphic print is made.
-
- Absolute - Width Limit and Height Limit are interpreted as absolute
- values. The printed picture's size is no longer bounded. Rather, it is
- the absolute size specified. For example, if the printed picture should
- be exactly 4.0 x 5.0 inches, set MaxWidth to 40, Width Limit to 50, and
- select Absolute. This completely overrides the aspecting feature of the
- printer device. Thus 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 only that dimension. Hence if Width Limit is
- set to 40 and Height Limit to 0, then the printed picture will be 4.0
- inches wide and as tall as necessary 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 necessary in order to be
- aspect ratio correct.
-
- Pixels - Width Limit and Height Limit are interpreted as absolute values
- in printer pixels rather than tenths of an inch. Otherwise, the same
- rules for the Absolute selection (Width Limit = 0 and Height Limit = 0)
- apply.
-
- Multiply - Width Limit and Height Limit are used to multiply the source
- picture's width and height. For instance, if you specified a WidthLimit
- of 2 and a Height Limit of 4, the printed picture would be two times the
- source picture's width pixels wide and 4 times 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 scaling (Width Limit = 0 and
- Height Limit = 0) apply. In addition, the benefits inherent to Integer
- scaling are valid here.
-
-
-
- Tips for Generating Better/Faster Graphic Dumps
- -----------------------------------------------
-
- Faster
- ------
-
- 1. If you are dumping a 1 bitplane image select the B&W mode in preferences.
- This is much faster than a grey-scale or color dump.
-
- 2. Horizontal dumps are much faster than vertical dumps as they use the
- blitter to read the pixel data.
-
- 3. Smoothing doubles the print time. Use it for final copy only.
-
- 4. F-S dithering doubles the print time. Ordered and halftone dithering
- incur no extra overhead.
-
- 5. The lower the density the faster the printout.
-
-
- Better
- ------
-
- 1. Friction fed paper tends to be much more accurate than tractor fed
- paper in terms of vertical dot placement (ie. less horizontal strips or
- white lines).
-
- 2. Densities which use more than one pass tend to produce 'muddy' grey-scale
- or color printouts. It is recommended that you not chose these densities
- when doing a grey-scale or color dump.
-
-