GetImageRect(Int32,Int32,Int32,DecodingSettings,EventHandler<ProgressEventArgs>,EventHandler<IntermediateImageRequestEventArgs>) Method (JpegPage)

Returns an image of scaled rectangle of this page.

Syntax

public Vintasoft.Imaging.VintasoftImage GetImageRect(
   System.Int32 decodingSettings, 
   System.Int32 firstRowIndex, 
   System.Int32 rowCount, 
   Vintasoft.Imaging.Codecs.Decoders.DecodingSettings scale, 
   System.EventHandler<ProgressEventArgs> imageLoadingProgress, 
   System.EventHandler<IntermediateImageRequestEventArgs> intermediateImageRequest
)

public: Vintasoft.Imaging.VintasoftImage* GetImageRect(
   System.Int32 decodingSettings, 
   System.Int32 firstRowIndex, 
   System.Int32 rowCount, 
   Vintasoft.Imaging.Codecs.Decoders.DecodingSettings* scale, 
   System.EventHandler<ProgressEventArgs*>* imageLoadingProgress, 
   System.EventHandler<IntermediateImageRequestEventArgs*>* intermediateImageRequest
)

public:
Vintasoft.Imaging.VintasoftImage^ GetImageRect(
   System.Int32 decodingSettings, 
   System.Int32 firstRowIndex, 
   System.Int32 rowCount, 
   Vintasoft.Imaging.Codecs.Decoders.DecodingSettings^ scale, 
   System.EventHandler<ProgressEventArgs^>^ imageLoadingProgress, 
   System.EventHandler<IntermediateImageRequestEventArgs^>^ intermediateImageRequest
)

'Declaration

Public Overloads Function GetImageRect( _
   ByVal decodingSettingsThe decoding settings that should be used for decoding of page image.
 As System.Int32, _
   ByVal firstRowIndexThe zero based index of first row to decode. Value of this parameter must be multiple McuHeight in sequential mode, and 0 in progressive mode.
 As System.Int32, _
   ByVal rowCountCount of rows to decode. Value of this parameter must be multiple McuHeight in sequential mode, and equal to Height in progressive mode.
 As System.Int32, _
   ByVal scaleScale factor. Value of this parameter must be either 1 or multiple 8 in sequential mode, and either 1 or 8 in progressive mode.
 As Vintasoft.Imaging.Codecs.Decoders.DecodingSettings, _
   ByVal imageLoadingProgressDelegate of the image loading progress. Can be set to null (Nothing in Visual Basic).
 As System.EventHandler(Of ProgressEventArgs), _
   ByVal intermediateImageRequestDelegate for requesting intermediate image. Can be set to null (Nothing in Visual Basic)
 As System.EventHandler(Of IntermediateImageRequestEventArgs) _
) As Vintasoft.Imaging.VintasoftImage

Parameters

decodingSettings: The decoding settings that should be used for decoding of page image.
firstRowIndex: The zero based index of first row to decode. Value of this parameter must be multiple McuHeight in sequential mode, and 0 in progressive mode.
rowCount: Count of rows to decode. Value of this parameter must be multiple McuHeight in sequential mode, and equal to Height in progressive mode.
scale: Scale factor. Value of this parameter must be either 1 or multiple 8 in sequential mode, and either 1 or 8 in progressive mode.
imageLoadingProgress: Delegate of the image loading progress. Can be set to null (Nothing in Visual Basic).
intermediateImageRequest: Delegate for requesting intermediate image. Can be set to null (Nothing in Visual Basic)

Return Value

Image of scaled rectangle of this page.

Exceptions

Exception	Description
System.ArgumentOutOfRangeException	Thrown if OperationMode == JpegOperationMode.SequentialBaseline and firstRowIndex is less than zero or greater than image height -or- firstRowIndex is not a multiple McuHeight -or- rowCount is less than zero or greater than available rows count -or- rowCount is not a multiple McuHeight -or- scale is less than zero or greater than rowCount -or- scale is neither 1 nor a multiple 8. Also thrown if OperationMode == JpegOperationMode.Progressive and firstRowIndex is not equal to 0 -or- rowCount is not equal to image height -or- scale is neither 1 nor 8.

Exception

Description

System.ArgumentOutOfRangeException

Thrown if OperationMode == JpegOperationMode.SequentialBaseline and firstRowIndex is less than zero or greater than image height -or- firstRowIndex is not a multiple McuHeight -or- rowCount is less than zero or greater than available rows count -or- rowCount is not a multiple McuHeight -or- scale is less than zero or greater than rowCount -or- scale is neither 1 nor a multiple 8. Also thrown if OperationMode == JpegOperationMode.Progressive and firstRowIndex is not equal to 0 -or- rowCount is not equal to image height -or- scale is neither 1 nor 8.

Requirements

Target Platforms: .NET9; .NET 8; .NET 7; .NET 6; .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5

Reference

JpegPage Class
JpegPage Members

Overload List

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