Encoder.Transformation フィールド

.NET Framework クラス ライブラリ リファレンス

Encoder.Transformation フィールド

変換パラメータ カテゴリのグローバル一意識別子を使用して初期化される Encoder オブジェクトを表します。

名前空間: System.Drawing.Imaging
アセンブリ: System.Drawing (system.drawing.dll 内)
構文

Visual Basic (宣言)

Public Shared ReadOnly Transformation
 As Encoder

Visual Basic (使用法)

Dim value As Encoder

value = Encoder.Transformation

C#

public static readonly Encoder Transformation

C++

public:
static initonly Encoder^ Transformation

J#

public static final Encoder Transformation

JScript

public static final var
 Transformation : Encoder

使用例

JPEG ファイルから Bitmap オブジェクトを作成する例を次に示します。このコードは、イメージを 90 度回転させて、別の JPEG ファイルに保存します。

Visual Basic

Imports System
Imports System.Drawing
Imports System.Drawing.Imaging


Class Example_RotateJPEG
    
    Public Shared Sub Main()
 
        Dim myBitmap As Bitmap
        Dim myImageCodecInfo As ImageCodecInfo
        Dim myEncoder As Encoder
        Dim myEncoderParameter As EncoderParameter
        Dim myEncoderParameters As EncoderParameters
        
        ' Create a Bitmap object based on a JPEG file.
        myBitmap = New Bitmap("Shapes.jpg")
        
        ' Get an ImageCodecInfo object that represents the JPEG codec.
        myImageCodecInfo = GetEncoderInfo("image/jpeg")
        
        ' Create an Encoder object based on the GUID
        ' for the Transformation parameter category.
        myEncoder = Encoder.Transformation
        
        ' Create an EncoderParameters object.
        ' An EncoderParameters object has an array of EncoderParameter
        ' objects. In this case, there is only one
        ' EncoderParameter object in the array.
        myEncoderParameters = New EncoderParameters(1)
        
        ' Rotate the image 90 degrees, and save it as a separate JPEG
 file.
        myEncoderParameter = New EncoderParameter(myEncoder, Fix(EncoderValue.TransformRotate90))
        myEncoderParameters.Param(0) = myEncoderParameter
        myBitmap.Save("ShapesR90.jpg", myImageCodecInfo,
 myEncoderParameters)
    
    End Sub 'Main
    
    Private Shared Function
 GetEncoderInfo(ByVal mimeType As String)
 As ImageCodecInfo 
        Dim j As Integer
        Dim encoders() As ImageCodecInfo
        encoders = ImageCodecInfo.GetImageEncoders()
        
        j = 0
        While j < encoders.Length
            If encoders(j).MimeType = mimeType Then
                Return encoders(j)
            End If
            j += 1
        End While
        Return Nothing
    
    End Function 'GetEncoderInfo
End Class 'Example_RotateJPEG

C#

using System;
using System.Drawing;
using System.Drawing.Imaging;
class Example_RotateJPEG
{
    public static void Main()
    {
        Bitmap myBitmap;
        ImageCodecInfo myImageCodecInfo;
        Encoder myEncoder;
        EncoderParameter myEncoderParameter;
        EncoderParameters myEncoderParameters;
                     
        // Create a Bitmap object based on a JPEG file.
        myBitmap = new Bitmap("Shapes.jpg");
                     
        // Get an ImageCodecInfo object that represents the JPEG codec.
        myImageCodecInfo = GetEncoderInfo("image/jpeg");
                     
        // Create an Encoder object based on the GUID
        // for the Transformation parameter category.
        myEncoder = Encoder.Transformation;
                     
        // Create an EncoderParameters object.
        // An EncoderParameters object has an array of EncoderParameter
        // objects. In this case, there is only one
        // EncoderParameter object in the array.
        myEncoderParameters = new EncoderParameters(1);
                     
        // Rotate the image 90 degrees, and save it as a separate JPEG
 file.
        myEncoderParameter = new EncoderParameter(
            myEncoder,
            (long)EncoderValue.TransformRotate90);
        myEncoderParameters.Param[0] = myEncoderParameter;
        myBitmap.Save("ShapesR90.jpg", myImageCodecInfo, myEncoderParameters);
    }
    private static ImageCodecInfo GetEncoderInfo(String
 mimeType)
    {
        int j;
        ImageCodecInfo[] encoders;
        encoders = ImageCodecInfo.GetImageEncoders();
        for(j = 0; j < encoders.Length; ++j)
        {
            if(encoders[j].MimeType == mimeType)
                return encoders[j];
        }
        return null;
    }
}

C++

#using <System.Drawing.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::Drawing::Imaging;
static ImageCodecInfo^ GetEncoderInfo( String^ mimeType );
int main()
{
   Bitmap^ myBitmap;
   ImageCodecInfo^ myImageCodecInfo;
   Encoder^ myEncoder;
   EncoderParameter^ myEncoderParameter;
   EncoderParameters^ myEncoderParameters;
   
   // Create a Bitmap object based on a JPEG file.
   myBitmap = gcnew Bitmap( "Shapes.jpg" );
   
   // Get an ImageCodecInfo object that represents the JPEG codec.
   myImageCodecInfo = GetEncoderInfo( "image/jpeg" );
   
   // Create an Encoder object based on the GUID
   // for the Transformation parameter category.
   myEncoder = Encoder::Transformation;
   
   // Create an EncoderParameters object.
   // An EncoderParameters object has an array of EncoderParameter
   // objects. In this case, there is only one
   // EncoderParameter object in the array.
   myEncoderParameters = gcnew EncoderParameters( 1 );
   
   // Rotate the image 90 degrees, and save it as a separate JPEG file.
   myEncoderParameter = gcnew EncoderParameter( myEncoder,(__int64)EncoderValue::TransformRotate90
 );
   myEncoderParameters->Param[ 0 ] = myEncoderParameter;
   myBitmap->Save( "ShapesR90.jpg", myImageCodecInfo, myEncoderParameters
 );
}

static ImageCodecInfo^ GetEncoderInfo( String^ mimeType )
{
   int j;
   array<ImageCodecInfo^>^encoders;
   encoders = ImageCodecInfo::GetImageEncoders();
   for ( j = 0; j < encoders->Length; ++j )
   {
      if ( encoders[ j ]->MimeType == mimeType )
            return encoders[ j ];

   }
   return nullptr;
}

J#

import System.* ;
import System.Drawing.* ;
import System.Drawing.Imaging.* ;

class Example_RotateJPEG
{
    public static void main(String[]
 args)
    {
        Bitmap myBitmap;
        ImageCodecInfo myImageCodecInfo;
        Encoder myEncoder;
        EncoderParameter myEncoderParameter;
        EncoderParameters myEncoderParameters;
        
        // Create a Bitmap object based on a JPEG file.
        myBitmap = new Bitmap("Shapes.jpg");
        
        // Get an ImageCodecInfo object that represents the JPEG codec.
        myImageCodecInfo = GetEncoderInfo("image/jpeg");
        
        // Create an Encoder object based on the GUID
        // for the Transformation parameter category.
        myEncoder = Encoder.Transformation;
        
        // Create an EncoderParameters object.
        // An EncoderParameters object has an array of EncoderParameter
        // objects. In this case, there is only one
        // EncoderParameter object in the array.
        myEncoderParameters = new EncoderParameters(1);
        
        // Rotate the image 90 degrees, and save it as a separate JPEG
 file.
        myEncoderParameter = new EncoderParameter(myEncoder,
                            (long)(EncoderValue.TransformRotate90));
        myEncoderParameters.get_Param().set_Item( 0 , myEncoderParameter );
        myBitmap.Save("ShapesR90.jpg", myImageCodecInfo, myEncoderParameters);
    } //main

    private static ImageCodecInfo GetEncoderInfo(String
 mimeType) 
    {
        int j;
        ImageCodecInfo encoders[];
        encoders = ImageCodecInfo.GetImageEncoders();
        for(j = 0; j < encoders.length; j++) {
            if ( encoders[j].get_MimeType().Equals(mimeType))
 {
                return encoders[j] ;
            }
        } 
        return null ;
    } //GetEncoderInfo
} //Example_RotateJPEG

プラットフォーム

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0

参照

関連項目
Encoder クラス
Encoder メンバ
System.Drawing.Imaging 名前空間