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Changelog

[1.3.8] - 2026-11-10

  • Ghostscript.NativeAssets 10.8.2: Ships Ghostscript / GhostPDL 10.08.0, with an updated Linux libgpdl.so.
  • Office status pipe: An Office job creates an anonymous pipe and passes -sSOPIPE to GhostPDL. A reader thread watches the pipe while gsapi_init_with_args is still running. The first zero ends the JSON record (message, key_ok, flags, product). Each later zero is one Office file. GhostscriptOffice.LastMessage, LastFlags, LastProduct, LastKeyOk, and LastDocumentCount are updated as those bytes arrive. A non-empty message is passed to the stdio stdout callback when the JSON arrives. key_ok is 0 when GhostPDL rejects the key or when no key was passed. Volume reporting uses LastFlags. gsapi_delete_instance runs after GhostPDL returns, and that is when the pipe is closed.
  • Volume-license reporting: Each Ghostscript call has its own reporter. Ghostscript.NET posts a volume key for Ghostscript.NET.Office (or all products) from those flags while GhostPDL is still converting. C# does not decode the key. The first document count is posted as soon as it is counted. Later counts are posted about every 10 seconds, and whatever remains is posted when that call's pipe reaches EOF. A later call starts another reporter. GhostscriptOffice.FlushActivity() waits for reporters that are still sending (10 second cap). The POST URL is Unlock(key, volumeMonitorUrl), else GHOSTSCRIPT_NET_OFFICE_VOLUME_MONITOR_URL, else https://lp2piszqpd.execute-api.us-east-1.amazonaws.com/usage. Set GHOSTSCRIPT_NET_OFFICE_ACTIVITY_VERBOSE=1 for the send log.

[1.3.6] - 2026-09-14

  • Office license key: Call GhostscriptOffice.Unlock(key) once with your Ghostscript.NET.Office key. After that, Word, Excel, and PowerPoint conversions use the full document. Without Unlock, only the first 3 pages are converted.
  • Ghostscript.NativeAssets 10.8.0: Ships Ghostscript / GhostPDL 10.08.0, including gpdldll on Windows and libgpdl on Linux. Referencing NativeAssets is enough for Office conversion; you still call Unlock for the full document. Linux ships a single libgs.so and libgpdl.so; Ghostscript.NET looks for those unversioned names only.
  • Rasterizer / Viewer (Ghostscript 10.01+): Call pdfshowpage_setpage before drawing so pdfi can set PageUsesTransparency and spot colors. The previous 10.01 split only ran empty pdfshowpage_init then pdfshowpage_finish, which could kill the process on a later page with no C# exception. Fixes #131.
  • GhostscriptPipedOutput (.NET 6+): Stop using SetHandleAsInvalid() and Thread.Abort(). Release the local client pipe handle with DisposeLocalCopyOfClientHandle(), read the pipe without disposing it from BinaryReader, and swallow expected close exceptions on the reader so Dispose() cannot crash the process. Fixes #146.

[1.3.5] - 2026-08-28

  • Office files: Word, Excel, and PowerPoint can be converted and rasterized when a licensed GhostPDL library is present. Without it, Office APIs throw GhostscriptPdlLibraryNotFoundException and point users to Artifex for a commercial Ghostscript.NET license.
  • Existing processor code: GhostscriptProcessor detects an Office path in the argument list, loads gpdldll if it is on the search path, and treats -dSAFER as -dNOSAFER for that job. Callers can keep GetLastInstalledVersion().
  • 32-bit GhostPDL: gpdldll32.dll exports stdcall names (_gsapi_revision@8). Ghostscript.NET now resolves those in x86 processes. NativeAssets gsdll32.dll already used undecorated names, so it was unaffected.
  • GhostPDL/SmartOffice is commercial. It is not in Ghostscript.NativeAssets or on nuget.org. Licensed users copy the library from Ghostscript.NET.Office into their project.

[1.3.4] - 2026-07-20

  • Bundled native library discovery: GhostscriptVersionInfo can locate app-local Ghostscript binaries (for example from Ghostscript.NativeAssets) via TryGetBundledVersion, GetBundledVersion, and GetPreferredVersion. GetLastInstalledVersion now prefers bundled assets before falling back to a system installation.

  • Ghostscript.NativeAssets: New optional companion NuGet package ships Ghostscript 10.07.1 native libraries for win-x64, win-x86, and linux-x64, with MSBuild targets to copy binaries into the application output.

  • Linux/macOS fromMemory fallback: Passing fromMemory: true to GhostscriptLibrary / GhostscriptProcessor no longer throws on non-Windows platforms; the native library is loaded from disk instead.

  • Centralizes package versions in Versions.props / Directory.Build.props.

  • Adds GhostscriptDiscoverySource (Bundled / System / Custom) on GhostscriptVersionInfo.

[1.3.3] - 2026-04-06

  • Unicode in arguments and file paths: Ghostscript is invoked with native-encoded argv (UTF-16LE on Windows, UTF-8 elsewhere) via pointer-based gsapi_init_with_args when available, and gsapi_run_file uses the same encoding model where supported. Non-ASCII characters in paths and switches are preserved instead of being mangled by the legacy string-based API. New bindings: gsapi_init_with_args_ptr, gsapi_run_file_ptr; GhostscriptProcessor, GhostscriptInterpreter, and related helpers route through these when the loaded Ghostscript library reports support.

  • Samples (Ghostscript.NET.Samples): RunMultipleInstancesSample now waits for both thread-pool jobs, passes -f and the input file as separate argv entries, uses load-from-memory on Windows for parallel processors, and points at a shared test PDF under TestFiles. ViewerSample writes the first page to Output/ViewerSample.png, synchronizes on raster completion, and uses Console.ReadLine() before teardown so work is not cut off; default input is the repo’s PipedOutputSample.ps instead of a missing PDF.

  • Sample inputs in TestFiles: All PDFs and other inputs referenced by the samples (for example ProcessorSample1.pdf, ProcessorSample2.pdf, RasterizerSample1.pdf, RasterizerSample2.pdf, GetInkCoverageSample.pdf, DeviceUsageSample.pdf, AddWatermarkSample.pdf, SendToPrinterSample.pdf, and the Unicode test PDFs) are collected under Ghostscript.NET.Samples/TestFiles/, together with PostScript such as PipedOutputSample.ps, so every demo reads from one shared folder.

[1.3.2] - 2025-12-10

  • Upgraded SkiaSharp version (2.88.8 -> 3.119.1)

  • Included SkiaSharp.NativeAssets.Linux

[1.3.2-rc.3] - 2025-12-05

  • Converted from System.Drawing.Bitmap to SkiaSharp.SKBitmap for cross-platform support

  • Replaced System.Drawing.Common package with SkiaSharp (2.88.8)

  • Updated memory operations to work on both Windows and Linux

  • Fixed color accuracy by correctly handling BGR format from Ghostscript

  • Updated platform-specific structures for Linux compatibility

[1.3.1] - 2025-10-28

  • Adds support for Linux by loading libgs.so.

[1.3.0] - 2025-03-18

  • Adds support for PDF/A conversion and ZUGFeRD samples with the PDFA3Converter module.

[1.2.3] - 2021-03-09

  • Fixed GhostscriptRasterizer/GhostscriptViewer and Ghostscript v.9.50+ compatibility issues.

[1.2.2] - 2021-02-04

  • Fixed Ghostscript 9.26+ compatibility.
  • Fixed problem when opening path/file that contains non-ASCII characters.
  • Fixed "Arithmetic operation resulted in an overflow" when using multithread instance.
  • Changed Y and Y DPI settings to match GhostscriptViewer.
  • Fixed CurrentPage -> TotalPages logging.
  • Fixed watermark transparency bug for PDF.

[1.2.1] - 2016-12-30

  • Fixed offset error in StdIn buffering.
  • Fixed problem with keeping whitespace return from the StdIn callbacks.
  • Fixed problem with GhostscriptProcessor and current page handling event.
  • Fixed problem with PDF signature/marker not being within first 32 bytes.
  • Fixed problem with System.ArgumentOutOfRangeException when StdOut message does not occur at beginning of the line.
  • Fixed problem with Amazon.Runtime.Internal.Util.HashStream.Position throwing NotSupportedException.
  • Added ability to keep native Ghostscript instance within GhostscriptProcessor and reuse it, avoiding multiple library load/free especially when loaded from memory.
  • GhostscriptRasterizer — added a constructor to allow capture of IO using GhostscriptStdIO (Rasterizer samples updated).
  • GhostscriptViewer — added GridFitTT=0 to improve text quality.
  • GhostscriptViewer — added public setter for DPI settings.
  • GhostscriptViewer — made Zoom method public; set test to false by default in Zoom.
  • GhostscriptViewer — changed ShowAfterOpen to public to set parameters without generating a PDF.

[1.2.0] - 2015-02-05

  • Fixed problem with checking for PDF file header signature in files that have extra bytes before the actual signature.
  • Fixed problem with the page rasterized to Image object in memory being disposed after GhostscriptRasterizer is closed.
  • Added ability to set custom switches for GhostscriptRasterizer and GhostscriptViewer.
  • Added more usage examples.

[1.1.9] - 2014-07-30

  • Fixed problem with PDF invisible layers (optional content groups left unmarked if process_trailer_attrs is not executed).
  • Fixed text rasterization problem for some PDFs by replacing pdfopen begin with runpdfopen.
  • Changed GhostscriptRasterizer methods to support Stream instead of MemoryStream.
  • Fixed handling files without extension in GhostscriptViewer and Rasterizer.

[1.1.8] - 2014-05-08

  • Fixed incompatibility with gsapi_set_arg_encoding in Ghostscript releases prior to 9.10.
  • Fixed older-version incompatibility with -dMaxBitmap=1g switch which in some cases turned on text antialiasing for Ghostscript 9.14.
  • Added better initialization checking.

[1.1.7] - 2014-04-29

  • Implemented Ghostscript native library verification with a friendly error message when the library is not compatible with the running process.
  • Fixed pipe client handle disposal bug when GhostscriptPipedOutput is used.
  • Fixed applying PDF page orientation for GhostscriptViewer and GhostscriptRasterizer.

[1.1.6] - 2014-04-23

  • Simplified GetInstalledVersions and GetLastInstalledVersion functions.
  • Fixed CropBox problem in GhostscriptViewer and GhostscriptRasterizer.
  • License changed to AGPL.

[1.1.5] - 2014-03-20

  • Fixed default cropping to BoundingBox for EPS in GhostscriptViewer and GhostscriptRasterizer.
  • Exposed GhostscriptViewer.EPSClip and GhostscriptRasterizer.EPSClip (default true; EPS only).
  • Fixed paths containing diacritics.
  • Added GhostscriptProcessor.Started and GhostscriptProcessor.Completed events.
  • Methods that worked with MemoryStream changed to use generic Stream.

[1.1.4] - 2014-02-14

  • Fixed applying GraphicsAlphaBits and TextAlphaBits (improved antialiasing in Viewer/Rasterizer).
  • Fixed output through main stderr callback handler.
  • Added MemoryStream support in GhostscriptPdfInfo.GetInkCoverage.
  • Added GraphicsAlphaBits and TextAlphaBits properties on Viewer and Rasterizer.

[1.1.3] - 2014-02-05

  • Added GhostscriptPdfInfo.GetInkCoverage for CMYK ink coverage per page (RGB converted internally).
  • Fixed opening MemoryStream EPS files with EPS Preview Header.
  • Fixed empty %%BoundingBox when handling PostScript files.
  • Fixed rasterizing EPS files created with Adobe Illustrator.
  • Fixed retrieving exported function handle in DynamicNativeLibrary on Server 2012 R2 with large memory.
  • Assembly now signed with a strong name key.

[1.1.2] - 2013-12-13

  • Fixed GhostscriptPipedOutput.Data getter race condition.
  • Added GhostscriptPipedOutput to the library.
  • Fixed GhostscriptException error code text message resolving.
  • Improved parameter checking and exception handling.
  • Changed ImageMemoryHelper from public to internal.
  • Implemented opening MemoryStream files from GhostscriptRasterizer and GhostscriptViewer.

[1.1.1] - 2013-10-09

  • Fixed MediaBox handling with negative llx/lly in Rasterizer and Viewer.
  • Added GhostscriptPngDevice (png16m, pngalpha, pnggray, png256, png16, pngmono, pngmonod).
  • Added GhostscriptJpegDevice (jpeg, jpeggray).
  • Extended GhostscriptProcessor.StartProcessing to support GhostscriptDevice.
  • Added constructors/methods that auto-use the last installed Ghostscript version.
  • Added samples: AddWatermarkSample, ProcessorSample, DeviceUsageSample.

[1.1.0] - 2013-10-07

  • Added GhostscriptViewer state handling (SaveState, RestoreState).
  • Extended GhostscriptRasterizer constructor to support an existing GhostscriptViewer instance.
  • Fixed 32-bit assembly with 32-bit Ghostscript on 64-bit Windows registry lookup.

[1.0.9] - 2013-09-27

  • Implemented EPS support for GhostscriptViewer.
  • Added GhostscriptRasterizer for exporting PDF/PS/EPS pages to System.Drawing.Image in memory with per-page DPI.
  • Fixed gsapi_stdin callback value passing.
  • Added ProgressiveUpdate property on GhostscriptViewer.

[1.0.8] - 2013-09-20

  • Renamed GhostscriptProcessor.Process to StartProcessing.
  • Implemented StopProcessing for multithread abort of gsapi_init_with_args.
  • Fixed ZoomIn/ZoomOut when decimal separator is comma.
  • Added page navigation and zoom checker properties on GhostscriptViewer.
  • Fixed viewing PostScript files without DSC header.

[1.0.7] - 2013-09-17

  • Implemented multi-page PostScript support for GhostscriptViewer.
  • Included Microsoft.WinAny.Helper sources for single-DLL deployment.
  • Added Processing event (TotalPages / CurrentPage) and Error event on GhostscriptProcessor.
  • Added DisplayPdfSample.

[1.0.6] - 2013-09-03

  • Added zoom-in and zoom-out functionality.
  • Fixed ImageMemoryHelper.Set24bppRgbImageColor when stride is not a multiple of 3.
  • Fixed displayed page size.

[1.0.5] - 2013-09-02

  • Implemented progressive display update while Ghostscript is drawing/rasterizing.
  • Fixed 64-bit vs 32-bit raster (stride) line size mismatch.
  • Changed GhostscriptViewer event logic; updated Viewer and DisplayTest samples.

[1.0.4] - 2013-08-30

  • Fixed display_device callback for 64-bit systems (32-bit and 64-bit Ghostscript compatibility).
  • Added GhostscriptViewer PostScript file handler.

[1.0.3] - 2013-08-28

  • Fixed GhostscriptInterpreter.Run string limit (strings larger than 64 KB supported).
  • Added GhostscriptViewer* classes for PDF on-screen rendering and navigation.
  • Added Ghostscript.NET.Viewer project.

[1.0.2] - 2013-08-26

  • Added GhostscriptInterpreter with StdIO and Display callbacks (PostScript from memory).
  • Added Ghostscript.NET.DisplayTest sample.
  • Changed samples logic for easier runs.
  • Fixed GetInstalledVersion to search GPL and AFPL and match process architecture.

[1.0.1] - 2013-08-26

  • Changed implementation logic.
  • Added GhostscriptProcessor with StdIO for processing via init arguments and output handling.

[1.0.0] - 2013-08-22

  • Initial release: Ghostscript functions implemented and base wrapper created.
  • Ability to run multiple Ghostscript instances within a single process.