GdPicture image identifier.
Example





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FxNegative Method (GdPictureImaging)

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Performs a negative effect (color inversion) on a GdPicture image or on an area of a GdPicture image defined by SetROI() method.
Syntax
'Declaration
 

Public Function FxNegative( _
   ByVal ImageID As Integer _
) As GdPictureStatus
public GdPictureStatus FxNegative( 
   int ImageID
)
public function FxNegative( 
    ImageID: Integer
): GdPictureStatus; 
public function FxNegative( 
   ImageID : int
) : GdPictureStatus;
public: GdPictureStatus FxNegative( 
   int ImageID
) 
public:
GdPictureStatus FxNegative( 
   int ImageID
)

Parameters

ImageID
GdPicture image identifier.

Return Value

A member of the GdPictureStatus enumeration.
Remarks
This method is used in the "Image Processing" Demo.
Example
Performing a negative effect on a GdPicture image.
Applying a negative effect on a single jpeg image.
using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
    // LoadInMemory parameter is set to true in order to be able to update the input file.
    int imageID = gdpictureImaging.CreateGdPictureImageFromFile("image.jpg", true);
    gdpictureImaging.FxNegative(imageID);
    gdpictureImaging.SaveAsJPEG(imageID, "image.jpg", 75);
    gdpictureImaging.ReleaseGdPictureImage(imageID);
}
Applying the fire effect and negative effect to two duplicates of the same image.
using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
    // Create two duplicate gdpicture images from the input file.
    int imageID1 = gdpictureImaging.CreateGdPictureImageFromFile("image.jpg", false);
    int imageID2 = gdpictureImaging.CreateClonedGdPictureImage(imageID1);
 
    // Process both of your images (differently).
    gdpictureImaging.FxFire(imageID1);
    gdpictureImaging.FxNegative(imageID2);
 
    // Save your images in the same multipage tif file.
    gdpictureImaging.TiffSaveAsMultiPageFile(imageID1, "images.tif", TiffCompression.TiffCompressionAUTO);
    gdpictureImaging.TiffAddToMultiPageFile(imageID1, imageID2);
    gdpictureImaging.TiffCloseMultiPageFile(imageID1);
    gdpictureImaging.ReleaseGdPictureImage(imageID1);
    gdpictureImaging.ReleaseGdPictureImage(imageID2);
}
See Also

Reference

GdPictureImaging Class
GdPictureImaging Members
CreateGdPictureImageFromFile(String) Method
ReleaseGdPictureImage Method