(v13) HqnImpose2 FixedSizeSheet suffix
This page applies to Harlequin v13.1r0 and later; both Harlequin Core and Harlequin MultiRIP.
This suffix procedure makes it easy for OEMs to code page geometry handling for devices with fixed sizes. The suffix has three functions:
- Disables the
Orientation
,ExtraOrientation
,FilmSaving
, andTimeSaving
keys in the page device. These are passed through by theOneUp
andNxN
objectives but are inappropriate for fixed size sheets.Orientation
andExtraOrientation
have already been acted on if using theOneUp
objective with theOneUpWithAspect
strategy. - Adjusts a layout if it is too large to fit on the device (typically because a single page is too large for the device).
- Increases the size of the raster created up to specified minimum values.
You must set the MaxWidth
and MaxHeight
keys to match the maximum imaging size of the output device. MinWidth
and MinHeight
may also be defined; they default to zero if they are not explicitly set. If an output device supports several different paper sizes, a Prefix may be used to select the appropriate paper and to set MaxWidth
, MaxHeight
, and so on to fit that sheet.
When calculating the number of pages that fits on a sheet using the FillSpace
objective, and BestFit
handling for NxN
objectives, the MaxWidth
and MaxHeight
values are increased by the value of SheetSlop
.
This value is defined in device pixels, rather than the points that are used for most other dimensions. Default value = 35 pixels.
If a flat design as generated by the selected Objective
and Tactic
is larger than the maximum size, OversizeStrategy
is acted on. The following values are currently supported:
| The bottom left corner of the page is drawn, and the top and/or right side of the page is clipped off. This is the default setting if |
| The top left corner of the page is drawn, and the bottom and/or right side of the page is clipped off. The |
| The center of the page is positioned at the center of the imaging area for each page. The top and bottom are clipped equally if the page is too tall for the imageable area; the left and right sides are clipped equally if the page is too wide. The |
| The |
| The page grid is scaled down in proportion until it fits inside the imaging area set aside for it. It is not adjusted to reset margins. This is designed to allow a layout prepared for plate making to be proofed unchanged except for scaling. |
| The page grid is scaled down in proportion until it fits inside the imaging area set aside for it. The flat design is then re-passed through the |
| The page is scaled down in proportion until it fits inside the imaging area set aside for it. This equates to For all three scaling options, the |
| The job is aborted at the time of the |
| GGS recommends this option is over |
The scale factor used when OversizeStrategy
is ScaleToFit
may be constrained by defining ScaleSnap
. The value should be an array of acceptable scale factors as real numbers less than 1
and in increasing order. For example:
/ScaleSnap [ 0.05 0.10 0.20 0.25 0.40 0.50 ]
The largest scale factor from this list that allows the page to fit is used. If the first entry in the array is too large to allow the page to fit using that value, it is still used.
If more than one page was placed on the flat, all such pages are clipped or scaled in the same way; you can print reduced pages four-up on a device with code such as the following:
<<
/Objective /NxN
/PagesAcross 2
/PagesUp 2
/Suffix /FixedSizeSheet
/OversizeStrategy /ScaleToFit
/MaxWidth 1200
/MaxHeight 1800
>> /HqnImpose2 /ProcSet findresource /HqnInitImpose get exec
OversizeStrategy
Procedures are held in a dictionary named OversizeStrategies
. The procedures do not receive or return data by the stack. The PanelWidth
and PanelHeight
keys are set to the maximum area available for each page before the procedures are called.
A number of objectives and the main HqnImpose2
control loop include simple backstops for handling single pages larger than the maximum flat size. Set StandardBackstop
to false
to disable all of these. (It defaults to true
.) Selecting the FixedSizeSheet
Suffix automatically sets StandardBackstop
to false
.
If the flat size is increased to match MinWidth
and MinHeight
, the HorCenter
and VertCenter
procedures are run.
These must leave a Boolean value on the operand stack; if true
, all page images on the flat are moved to center the flat design on the flat. This does not move any control marks, or marks drawn using a FilmOverlay
procedure. The default procedures examine the CenterOnMediaLength
and CenterOnMediaWidth
keys in the page device.