ABBYY FRE for Windows vs. macOS

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Differences

• While the ABBYY FineReader Engine for Windows API conforms to the COM standard and can be used in any development tool supporting COM, the macOS version provides only C/C++ native API and a Java wrapper, so your application needs to be written in C/C++ or Java.
• You need to work with string properties using FREngineAllocString and FREngineFreeString functions instead of SysAllocString or SysFreeString.
• When loading ABBYY FineReader Engine as an out-of-process server, you must pass NULL for parameters derived from IUnknown. These parameters are commonly used in export methods. To pass the export parameters in an alternative way, create a user profile with the desired settings.
• Distribution packages for Windows and macOS platforms are different. See details in ABBYY FineReader Engine Distribution Kit.
• Default fonts used for synthesis are different. They are selected from macOS system font set.
• IMultiProcessingParams::UseOnlyPhysicalCPUCores property value is ignored.
• The IEngine::OpenImageFileFromMemory, IFRDocument::AddImageFileFromMemory methods receive two parameters instead of one HGLOBAL handle — a pointer to the memory block and an __int64 variable equal to image size.
• The methods working with memory image formats (Raw, Bitmap, DIB) are not implemented: IImage::EstimateBitmapSize, IImage::GetBitmap, IEngine::OpenBitmap, IEngine::OpenBitmapBits, IEngine::OpenDib IEngine::PrepareBitmap, IEngine::PrepareBitmapBits, IEngine::PrepareDib, ITrainingImage::SetBitmapBits.

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Unsupported functionality

• IEngine::ParentWindow, IEngine::ApplicationTitle
• IEngineLoader, InprocLoader, OutprocLoader, IHostProcessControl
• WDP, WIC, DjVu input image formats (IFF_WdpBw, IFF_WdpGray, IFF_WdpColor, IFF_Wic, IFF_DjVuBw, IFF_DjVuGray, IFF_DjVuColor in the ImageFileFormatEnum enumeration)
• Methods for saving into memory and loading from memory which use HGLOBAL in Windows version:
  • SaveToMemory, LoadFromMemory methods of so-called persistent objects
  • IImageDocument::SaveToMemory, IEngine::LoadImageDocFromMemory methods
  • IPDFAttachments::AddFromMemory, IPDFAttachment::SaveToMemory
• Scanning:
  • IEngine::CreateScanManager, ScanManager
  • IScanCallback
  • ScanSources, ScanSource, ScanSourceSettings, ScanSourceCapabilities
  • ScanSourceApiTypeEnum, ScanRotationAngleEnum, ScanPaperSizeEnum, ScanColorModeEnum, ScanCompressionTypeEnum, ScanBrightnessControlEnum, ScanPaperFeedModeEnum, ScanPauseModeEnum, ScanSourceStatusEnum
  • Scanning license module
• IDictionary::Edit
• Pattern training GUI:
  • IEngine::EditUserPattern
  • IRecognizerParams::TrainUserPatterns
  • UserPatternsTraining license module
• Visual Components and related FineReader Engine API:
  • autoanalysis blocks (IAutoAnalysisBlock, BlockTypeEnum::BT_AutoAnalysis)
  • ILayout::VisualBlocks
  • AvailableVisualComponentsFlags and ILicense::AvailableVisualComponents
• Special predefined languages are not currently available

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See also