John Tytgat & Martin Würthner - PostScript 3 driver
PS3 is a new PostScript 3 printer driver implemented from scratch as a replacement
for the old Acorn PostScript level 2 printer driver. This new driver offers many
improvements over the standard Acorn driver leading to higher quality both when
printing to PostScript 3 printers and when creating PDF files using the PostScript
printer driver and Ghostscript (e.g., via PrintPDF or ps2pdf).
The PostScript 3 driver is 32-bit compatible for Iyonix and A9home compatibility and also fully ARMv7 compatible,
so it runs on the Cortex-A8 processor used in the BeagleBoard.
The PostScript 3 driver has won the Icon Bar award for the best commercial product 2009. See the official announcement on The Icon Bar.
The following example print of an ArtWorks file with four 256 colour sprites embedded in an OvationPro document demonstrates two of the improvements offered by the new driver. The output from the old PostScript level 2 printer driver (shown on the left hand side) suffers from badly degraded colours. The first printed sprite is not too bad but with each additional sprite that is printed colour quality gets worse. The output also suffers from pixel dropouts (as can be seen in the enlarged image) caused by the fact that there are not 4 images in the PostScript file as one might expect but almost 7000 tiny fragments. This kind of output can cause printers to render the file very slowly.
The output from the new PostScript 3 driver (shown on the right hand side) renders all sprites with perfect colour accuracy and represents them as 4 images in the PostScript file as expected.
 So far, all applications use their own non-mask-aware code because the standard PostScript driver cannot print CMYK sprites at all.
 Applies to ArtWorks files without transparency. ArtWorks files with transparency are printed as bitmaps to PostScript drivers and hence are not affected by the limited quality of graduated fills printed by ArtWorks to the standard PostScript drivers.
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|Last modified: 01-Jun-12|