Encoder.Transformation Field

定義

変換パラメーター 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。 Represents an Encoder object that is initialized with the globally unique identifier for the transformation parameter category.

public static readonly System.Drawing.Imaging.Encoder Transformation;
フィールド値

次の例では、作成、 Bitmap JPEG ファイルからのオブジェクト。The following example creates a Bitmap object from a JPEG file. コードは、イメージを 90 度回転させます、別の JPEG ファイルに保存します。The code rotates the image 90 degrees and saves it in a separate JPEG file.

#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;
}

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;
    }
}
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

注釈

パラメーターがカプセル化されたイメージ エンコーダー パラメーターを渡すと、ときに、EncoderParameterオブジェクト。When you pass a parameter to an image encoder, the parameter is encapsulated in an EncoderParameter object. フィールドの 1 つ、EncoderParameterオブジェクトは、パラメーターのカテゴリを指定する GUID です。One of the fields of the EncoderParameter object is a GUID that specifies the category of the parameter. 静的フィールドを使用して、Encoderを取得するクラス、Encoder適切なカテゴリのパラメーターを格納しています。Use the static fields of the Encoder class to retrieve an Encoder that contains parameters of the desired category.

組み込まれているイメージ エンコーダーGDI+GDI+パラメーターを受け取る複数のカテゴリに属していること。The image encoders that are built into GDI+GDI+ receive parameters that belong to several categories. 次の表に、すべてのカテゴリと各カテゴリに関連付けられている GUID。The following table lists all the categories and the GUID associated with each category.

ChrominanceTable
f2e455dc-09b3-4316-8260-676ada32481cf2e455dc-09b3-4316-8260-676ada32481c

ColorDepth
66087055-ad66-4c7c-9a18-38a2310b833766087055-ad66-4c7c-9a18-38a2310b8337

Compression
e09d739d-ccd4-44ee-8eba-3fbf8be4fc58e09d739d-ccd4-44ee-8eba-3fbf8be4fc58

LuminanceTable
edb33bce-0266-4a77-b904-27216099e717edb33bce-0266-4a77-b904-27216099e717

Quality
1d5be4b5-fa4a-452d-9cdd-5db35105e7eb1d5be4b5-fa4a-452d-9cdd-5db35105e7eb

RenderMethod
6d42c53a-229a-4825-8bb7-5c99e2b9a8b86d42c53a-229a-4825-8bb7-5c99e2b9a8b8

SaveFlag
292266fc-ac40-47bf-8cfc-a85b89a655de292266fc-ac40-47bf-8cfc-a85b89a655de

ScanMethod
3a4e2661-3109-4e56-8536-42c156e7dcfa3a4e2661-3109-4e56-8536-42c156e7dcfa

Transformation
8d0eb2d1-a58e-4ea8-aa14-108074b7b6f98d0eb2d1-a58e-4ea8-aa14-108074b7b6f9

Version
24d18c76-814a-41a4-bf53-1c219cccf79724d18c76-814a-41a4-bf53-1c219cccf797

適用対象