Specifications

CHAPTER 3
LaserWriter Pro Software
36 Page Device Parameters
There are additional entries in the PreRenderingEnhanceDetails dictionary that
you should change only with an application program like LaserWriter Utility, which is
supplied with the printer. These parameters compensate for such factors as atmospheric
humidity and toner life. Table 3-7 summarizes these parameters.
FinePrint Parameters 3
The FinePrint feature increases the apparent resolution of the printer by adjusting the
dots placed by the laser. Special hardware acts on the frame buffer, which is produced by
rendering a PostScript language program, to produce smoother edges. The FinePrint
feature is dependent upon resolution, and is only available in the 300 x 300 resolution
mode of the LaserWriter Pro printer.
This feature is considered a post-rendering enhancement. Unlike PhotoGrade, the
anti-aliasing hardware controlled by PostRenderingEnhance does not incur any
memory or computational penalty.
Two pagedevice parameters in the LaserWriter Pro printer contains special
information to support the FinePrint features of the printer. These parameters are
PostRenderingEnhance and PostRenderingEnhanceDetails. See Table 3-8.
Table 3-7 PhotoGrade calibration parameters
Key Type Semantics
S1 String 60-byte string of encoded values
S2 String 96-byte string of encoded values
S3 String 96-byte string of encoded values
S4 String 256-byte string of encoded values
NOTE The value of each of these keys is persistent across power cycles.
Table 3-8 FinePrint device parameters
Device parameter Description
PostRenderingEnhance Indicates whether or not you have requested FinePrint. You
can only do this when the printer is in 300 x 300 resolution
mode. Page descriptions can change this value within
save/restore boundaries.
PostRenderingEnhanceDetails Contains two entries: Type and ActualPostRenderingEnhance.
You should consider this a read-only dictionary, the main
purpose of which is to indicate whether or not a request for
FinePrint succeeded.
NOTE See Chapter 2 of the PostScript Language Reference Manual Supplement.