19.0

New Features

• Greatly expanded support for the RESTful Dynamic Web TWAIN Service.
• PDF Handling:
  • Added new PDF Rasterizer Add-On API preserveUnmodifiedOnSave to preserve the size of unmodified PDF pages when saving.
  • Added new PDF Rasterizer Add-On API IsRasterizationRequired(). This API returns true if the PDF file contains content other than one image per page. Please note that while invoking this API does not require a license for the PDF Rasterizer Add-On, a license is required to perform actual rasterization of the PDF for viewing purposes.
• Cross-platform support: Added macOS and Linux platform support for DWT Barcode Reader Add-On.
• Error messages: Added more informative error messages with the new ErrorCause API.
• Keyboard accessibility: Added Tab key keyboard navigation in the DWT Viewer. The browser now shows a focus outline on the Viewer upon tabbing into the Viewer, which can be disabled with the new {WebTwainObject}.Viewer.disableFocusOutline API. (this property is true by default, i.e. disables the outline)

Improvements

• Security enhancements: updated third-party libraries to enhance security.
• Image rasterization logic: The logic is optimized when two or all of the following properties are specified in ReaderOptions.RenderOptions: maxWidth, maxHeight, and resolution.
• Renamed the Dynamsoft Service to Dynamic Web TWAIN Service.
• New Dynamic Web TWAIN Service installation path for Windows: moved installation out of SysWOW64 and System32 on Windows to prevent rare false positive antivirus scans.
  • New 64-bit system-wide installation location: C:\Program Files (x86)\Dynamsoft\Dynamic Web TWAIN Service 19
  • New 32-bit system-wide installation location: C:\Program Files\Dynamsoft\Dynamic Web TWAIN Service 19
• Changed ErrorString messages associated with ErrorCode -2003 for HTTPUpload-related APIs to include HTTP codes in the form of HTTP process: {message}({HTTP status code}), e.g. HTTP process: OK(200). This change applies to ErrorString for the following APIs:
  • {WebTwainObject}.HTTPUpload()
  • {WebTwainObject}.HTTPUploadThroughPost()
  • {WebTwainObject}.HTTPUploadThroughPostEx()
  • {WebTwainObject}.HTTPUploadAllThroughPostAsMultiPageTIFF()
  • {WebTwainObject}.HTTPUploadAllThroughPostAsPDF()
  • {WebTwainObject}.HTTPUploadThroughPostAsMultiPagePDF()
  • {WebTwainObject}.HTTPUploadThroughPostAsMultiPageTIFF()
• Thumbnail Viewer customization: added a position property to the ThumbnailViewerEvent to facilitate further customizations, for example, displaying a delete icon when the mouse is hovering over a thumbnail.

Removed Features

• Discontinued support for the PDF Compressor Add-On.
• Discontinued out-of-the-box support for ActiveX.
• Discontinued support for 32-bit macOS: now only supporting macOS versions 10.15 and higher.
• Discontinued Android support.

Bug Fixes

• Fixed a CORS request blocked error which also triggers a prompt to install the Dynamic Web TWAIN Service.
• Fixed Vite runtime errors caused by polyfills and resource path misconfiguration.