GdPicture.NET.14.API~GdPicture14.GdPictureImaging~ResizeWidthRatio - ResizeWidthRatio Method (GdPictureImaging) -

public GdPictureStatus ResizeWidthRatio( 
   int ImageID,
   int NewImageWidth,
   GdPictureInterpolationMode InterpolationMode
)

public function ResizeWidthRatio( 
    ImageID: Integer;
    NewImageWidth: Integer;
    InterpolationMode: GdPictureInterpolationMode
): GdPictureStatus;

public function ResizeWidthRatio( 
   ImageID : int,
   NewImageWidth : int,
   InterpolationMode : GdPictureInterpolationMode
) : GdPictureStatus;

public: GdPictureStatus ResizeWidthRatio( 
   int ImageID,
   int NewImageWidth,
   GdPictureInterpolationMode InterpolationMode
)

public:
GdPictureStatus ResizeWidthRatio( 
   int ImageID,
   int NewImageWidth,
   GdPictureInterpolationMode InterpolationMode
)

'Declaration
 
Public Function ResizeWidthRatio( _
   ByVal ImageID As Integer, _
   ByVal NewImageWidth As Integer, _
   ByVal InterpolationMode As GdPictureInterpolationMode _
) As GdPictureStatus

Parameters

ImageID: GdPicture image identifier.
NewImageWidth: The new image width in pixel.
InterpolationMode: A member of the Drawing2D.InterPolationMode enumeration.

Return Value

A member of the GdPictureStatus enumeration.

This method automatically adjusts the vertical and horizontal image resolution in order to maintain the aspect ratio. If the intention is to change the aspect ratio, the SetVerticalResolution() and/or SetHorizontalResolution() methods should be used instead.

Resizing the image making it twice the original size.

C#

using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
    int imageID = gdpictureImaging.CreateGdPictureImageFromFile("input.png");
 
    // Resize the image making its width twice larger. The height of the image will be changed in order to maintain the aspect ratio.
    int width = gdpictureImaging.GetWidth(imageID);
    gdpictureImaging.ResizeWidthRatio(imageID, width * 2, System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic);
 
    gdpictureImaging.SaveAsPNG(imageID, "output.png");
 
    gdpictureImaging.ReleaseGdPictureImage(imageID);
}

Reference

GdPictureImaging Class
GdPictureImaging Members