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Headline changes: Windows RT viewer app for MuPDF. MuPDF now opens JPEG, TIFF and PNG files directly. PWG raster (mono/grey/rgb) and PCL (mono) output devices. Improved source directory structure and header file layout. Android app now supports Google Cloud Print. Android app translated into many languages. Android support for more architectures. Exciting new features (still in beta, use with care!): Library changes to support progressive loading (display PDF files as they download). Windows/Linux/MacOS viewer supports this using curl. Incremental updates to PDF files are now (optionally) preserved on loading/saving. Prototype support for checking PDF Digital Signatures. Initial annotation support (strike-out, underline, highlight and ink) (library and android builds only). Initial (feature incomplete) SVG and PDF output devices. Optimisations: Improvements to store (avoid collisions causing unnecessary evictions). Caching of rendered tiles for speed. PDF image handling improved; images can now be passed to devices without decompression. PDF function handling improved; functions can now be passed to devices without 'sampling'. Indexed images are no longer uncompressed at load time, saving memory. Various performance improvements (including tilings and mesh based shadings). Android redraw optimisations. Bug fixes: Windows apps use Unicode filenames now. Improved text analysis mode, capable of spotting columns/indents, right-to-left text etc. HTML output mode now includes image output. Fix operation on Android API level 8. PDF password encoding handling improved. Bug preventing OpenXPS files from being opened fixed. Various potential SEGV, SoftMask and rendering fixes. Many potential crashes in Jpeg2000 and JBIG2 images fixed.
Highlights in this release include: Background printing (BGPrint)is a new feature allowing an accumulated page clist to be rendered by one or more rendering threads whilst the interpreter (in the "main" thread) continues to accumulate the subsequent page's clist. For certain classes of file this can result in a useful performance increase. See: Banding Parameters GrayDetection allows suitably written devices to detect "color" input in near neutral tones (i.e. near monochrome) and to convert "on-the-fly" to pure grayscale, whilst retaining the ability to print full color on demand. This is primarily aimed at workflows where saving ink (especially color inks) is required. See: Device Parameters LittleCMS2 and libpng have both been updated to the latest versions. Support has been added to build the Ghostscript DLL for WinRT for x86, x64 and ARM (Requires MS Visual Studio 2012 Pro). Processing of Windows command line arguments into UTF8 (as presaged a few releases ago) has been enhanced and enabled by default. The URW Postscript font set has been updated to the latest version, fixing many compatibility problems with the Adobe fonts. Plus the usual round of bug fixes, compatibility changes, and incremental improvements.