OcrRuntimeFileMode Enumeration (original) (raw)

Summary

Operation to be performed on an OCR runtime file.

Syntax

public enum OcrRuntimeFileMode 

public: enum class OcrRuntimeFileMode sealed

class OcrRuntimeFileMode(Enum): Exists = 0 Open = 1 Close = 2

Members

Example

using Leadtools; using Leadtools.Codecs; using Leadtools.Ocr; using Leadtools.Document.Writer; public static void OcrRuntimeFileCallbackExample() { // This example assumes that some or all of the OCR runtime files are copied into "C:\MyDir" folder and simulates // an environment where the runtime files can be obtained through helper methods HasResource and GetResourceStream. // Create an OCR engine instance IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.LEAD); // Install a OCR file runtime handler ocrEngine.RuntimeFileCallback = MyRuntimeFileCallback; // Startup the engine ocrEngine.Startup(null, null, null, null /* startupParameters is null*/); // Perform OCR operation ocrEngine.AutoRecognizeManager.Run( @"C:\LEADTOOLS22\Resources\Images\ocr1.tif", @"C:\LEADTOOLS22\Resources\Images\out.pdf", DocumentFormat.Pdf, null, null); // Shutdown ocrEngine.Shutdown(); // Remove the handler ocrEngine.RuntimeFileCallback = null; // Dispose the engine ocrEngine.Dispose(); } private static RasterExceptionCode MyRuntimeFileCallback(IOcrEngine engine, OcrRuntimeFile runtimeFile) { // Called by the OCR engine for each runtime file operation RasterExceptionCode result = RasterExceptionCode.Success; // Check the operation: switch (runtimeFile.Mode) { case OcrRuntimeFileMode.Exists: Debug.WriteLine($"MyRuntimeFileCallback does '{runtimeFile.FileName}' exist"); // The engine is checking if a certain file exists, call our HasResource helper if (!HasResource(runtimeFile.FileName)) result = RasterExceptionCode.FileNotFound; break; case OcrRuntimeFileMode.Open: Debug.WriteLine($"MyRuntimeFileCallback open '{runtimeFile.FileName}'"); // The engine requested to open the file for reading, call our GetResourceStream helper // and set the Stream property accordingly runtimeFile.Stream = GetResourceStream(runtimeFile.FileName); break; case OcrRuntimeFileMode.Close: Debug.WriteLine($"MyRuntimeFileCallback close '{runtimeFile.FileName}'"); // The engine requested to close the file after reading. // Dispose our stream runtimeFile.Stream.Dispose(); break; } return result; } private static bool HasResource(string resourceName) { // Do we have this resource? // In our simulation, we will simply check if the file exist on disk // In an Android application, this can check if a resource with this name was embedded return System.IO.File.Exists(Path.Combine(@"C:\MyDir", resourceName)); } private static Stream GetResourceStream(string resourceName) { // Get a stream that can read from resource // In our simulation, we will simply check if the file exist on disk // In an Android application, this can call the appropriate platform API to obtain // a stream to the resource return System.IO.File.OpenRead(Path.Combine(@"C:\MyDir", resourceName)); }