Encoder.Transformation 필드

정의

네임스페이스:

System.Drawing.Imaging

어셈블리:

System.Drawing.Common.dll

패키지:

System.Drawing.Common v8.0.0

Source:

Encoder.cs

Transformation 매개 변수 범주의 GUID를 사용하여 초기화된 Encoder 개체를 나타냅니다.

public: static initonly System::Drawing::Imaging::Encoder ^ Transformation;

public static readonly System.Drawing.Imaging.Encoder Transformation;

 staticval mutable Transformation : System.Drawing.Imaging.Encoder

Public Shared ReadOnly Transformation As Encoder 

필드 값

Encoder

예제

다음 예제에서는 JPEG 파일에서 개체를 만듭니다 Bitmap . 코드는 이미지를 90도 회전하고 별도의 JPEG 파일에 저장합니다.

#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.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
    
    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

설명

이미지 인코더에 매개 변수를 전달하면 매개 변수가 개체에 EncoderParameter 캡슐화됩니다. 개체의 EncoderParameter 필드 중 하나는 매개 변수의 범주를 지정하는 GUID입니다. 클래스의 Encoder 정적 필드를 사용하여 원하는 범주의 매개 변수가 포함된 를 검색 Encoder 합니다.

GDI+에 기본 제공되는 이미지 인코더는 여러 범주에 속하는 매개 변수를 받습니다. 다음 표에는 각 범주와 연결된 모든 범주 및 GUID가 나열되어 있습니다.

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