LeadTempFileMode Enumeration

Summary

Enumeration that indicates whether the temp files are on disk, in memory or a combination of disk and memory.

Syntax

Objective-C

C++/CLI

Java

Python

public enum LeadTempFileMode

typedef NS_ENUM(NSInteger, LTLEADTempFileMode) { 
 LTLEADTempFileModeAuto,  
 LTLEADTempFileModeDisk,  
 LTLEADTempFileModeDiskAndMemory,  
 LTLEADTempFileModeMemory 
};

public final class LeadTempFileMode 
    extends java.lang.Enum<LeadTempFileMode>

public: 
   enum class LeadTempFileMode sealed

class LeadTempFileMode(Enum): 
   Auto = 0 
   Disk = 1 
   DiskAndMemory = 2 
   Memory = 3

Members

Value	Member	Description
0	Auto	Lets LEADTOOLS pick the default mode (behavior might change from one version to another). Currently, it is the same as `DiskAndMemory`
1	Disk	Disk only, does not use memory to back up temp files.
2	DiskAndMemory	Uses Memory for small temp files, but disk for large temp files.
3	Memory	Disables disk, all temp files should be created in memory. Some features might fail with if they require temporary files on disk. The failure might be an out of memory errors or a RasterException with code set to RasterExceptionCode.TempFileDiskDisabled.

Remarks

Refer to RasterDefaults.TempFileMode for more information.

Example

using Leadtools; 
using Leadtools.Codecs; 
 
 
public static void RasterDefaults_TempFileMode_Example() 
{ 
	// Store the default value 
	LeadTempFileMode defaultTempFileMode = RasterDefaults.TempFileMode; 
	GlobalMemoryThresholds defaultGlobalMemoryThreshold = RasterDefaults.GetGlobalMemoryThresholds(); 
 
	// Set to auto 
	Console.WriteLine("RasterDefaults.TempFileMode is Auto"); 
	RasterDefaults.TempFileMode = LeadTempFileMode.Auto; 
 
	// Allocating an image should work, normal conventional 
	using (var image = RasterImage.Create(1024, 1024, 32, 300, RasterColor.FromKnownColor(RasterKnownColor.White))) 
	{ 
		Console.WriteLine("default options:"); 
		Console.WriteLine("  image.IsConventionalMemory:" + image.IsConventionalMemory); 
		Console.WriteLine("  image.IsDiskMemory:" + image.IsDiskMemory); 
		Console.WriteLine("  image.IsTiled:" + image.IsTiled); 
		Debug.Assert(image.IsConventionalMemory); 
		Debug.Assert(!image.IsDiskMemory); 
		Debug.Assert(!image.IsTiled); 
	} 
 
	Console.WriteLine("MaximumConventionalMemory is set to low"); 
	// Change the default maximum memory threshold to something small (1MB) 
	GlobalMemoryThresholds globalMemoryThreshold = RasterDefaults.GetGlobalMemoryThresholds(); 
	globalMemoryThreshold.MaximumConventionalMemory = 1 * 1024 * 1024; 
	RasterDefaults.SetGlobalMemoryThresholds(globalMemoryThreshold); 
 
	// Now, the image should be of type disk or tiled 
	using (var image = RasterImage.Create(1024, 1024, 32, 300, RasterColor.FromKnownColor(RasterKnownColor.White))) 
	{ 
		Console.WriteLine("low global memory threshold:"); 
		Console.WriteLine("  image.IsConventionalMemory:" + image.IsConventionalMemory); 
		Console.WriteLine("  image.IsDiskMemory:" + image.IsDiskMemory); 
		Console.WriteLine("  image.IsTiled:" + image.IsTiled); 
		Debug.Assert(!image.IsConventionalMemory); 
		Debug.Assert(image.IsDiskMemory || image.IsTiled); 
	} 
 
	// Disable disk for temp files 
	Console.WriteLine("RasterDefaults.TempFileMode is Memory"); 
	RasterDefaults.TempFileMode = LeadTempFileMode.Memory; 
 
	// Now it should go back to conventional 
	using (var image = RasterImage.Create(1024, 1024, 32, 300, RasterColor.FromKnownColor(RasterKnownColor.White))) 
	{ 
		Console.WriteLine("low global memory threshold:"); 
		Console.WriteLine("  image.IsConventionalMemory:" + image.IsConventionalMemory); 
		Console.WriteLine("  image.IsDiskMemory:" + image.IsDiskMemory); 
		Console.WriteLine("  image.IsTiled:" + image.IsTiled); 
		Debug.Assert(image.IsConventionalMemory); 
		Debug.Assert(!image.IsDiskMemory); 
		Debug.Assert(!image.IsTiled); 
	} 
 
	// Reset 
	RasterDefaults.SetGlobalMemoryThresholds(defaultGlobalMemoryThreshold); 
	RasterDefaults.TempFileMode = defaultTempFileMode; 
}

Requirements

Target Platforms

Reference

Leadtools Namespace

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Help Version 22.0.2023.5.16

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