Log Message:
Changes 9.14:
pdfwrite now uses the same color management engine as Ghostscript rendering \ 
devices (by default LCMS2). This provides much better control over color \ 
conversion and color management generally, but will result in some small color \ 
differences when compared to the old system.

It is no longer necessary to specify UseCIEColor (and we very much encourage you \ 
not to do this) or the ProcessColorModel if you want to convert a PDF file to a \ 
specific color space, simply set the ColorConversionStrategy appropriately.

We do not expect any major problems to arise with this new code, but for the \ 
duration of this release a new switch -dPDFUseOldCMS is available which will \ 
restore the old color management. See: Color Conversion and Management

Please note that due to constraints of the PDF/A-1 specification, the new color \ 
management does not yet apply when producing PDF/A files.

A new device 'eps2write' has been added which allows for the creation of EPS \ 
files using the ps2write device instead of the old (deprecated and removed) \ 
pswrite device. This produces considerably better quality EPS files than the old \ 
epswrite device which is now also deprecated and will be removed in a future \ 
release.

ps2write now has a feature to allow customisation of the output for specific \ 
devices. Please see PSDocOptions and PSPageOptions described in ps2ps2.htm \ 
Additional Distiller Params

Ghostscript now reduces memory usage when processing PDF files that use \ 
transparency and output is to display devices such as Windows display or x11 \ 
(i.e. devices that are strictly full framebuffer devices), and to high level \ 
vector devices that cannot reproduce the PDF transparency model, such as the \ 
ps2write device or pdfwrite when 'flattening' to PDF 1.3 or earlier \ 
(-dCompatibilityLevel=1.3). This uses banding (clist) files to render the \ 
transparent areas in bands to reduce memory use, and unlike the existing page \ 
level banding, this is hidden from the target device.

Ghostscript can now collect information for pages in temp files (in \ 
Ghostscript's clist format), then render and output pages for the job in \ 
arbitrary order, including normal, reverse, odd, even, or any order or subset of \ 
the pages. This is controlled with the --saved-page=___ option. (Note that this \ 
only applies to rendering devices, and not high level devices such as pdfwrite \ 
and ps2write.) See: Deferred Page Rendering

The Ghostscript device architecture has been extended so that, when rendering \ 
bands into multiple threads, it is now possible to perform post-processing in \ 
multiple threads, such as downscale, post-render halftoning, or compression. \ 
Previously, post processing was only possible in the single main thread. This \ 
can improve performance significantly.

Ghostscript has a new "pwgraster" output device for PWG Raster output

The CUPS device now has improved support for PPD-less printing

Plus the usual round of bug fixes, compatibility changes, and incremental \ 
improvements.