GdPictureImaging.DrawGdPictureImageTransparency Method

Draws a GdPicture image into another GdPicture image applying a transparency effect.

public GdPictureStatus DrawGdPictureImageTransparency(
    int SrcImage, 
    int DstImage, 
    int Transparency, 
    int DstLeft, 
    int DstTop, 
    int DstWidth, 
    int DstHeight, 
    InterpolationMode InterpolationMode
);

Visual Basic

Public Function DrawGdPictureImageTransparency(
    ByVal SrcImage As Integer, 
    ByVal DstImage As Integer, 
    ByVal Transparency As Integer, 
    ByVal DstLeft As Integer, 
    ByVal DstTop As Integer, 
    ByVal DstWidth As Integer, 
    ByVal DstHeight As Integer, 
    ByVal InterpolationMode As InterpolationMode
) As GdPictureStatus

Parameters

Parameters	Description
SrcImage	GdPicture Image Identifier. Specifies the image to be drawn.
DstImage	GdPicture Image Identifier. specifies the image to draw.
Transparency	Transparency to apply to the drawn image [0 ; 255]. 0 means full opacity and 255 full transparency.
DstLeft	Specifies the x-coordinate in pixel of the upper-left corner of the destination rectangle at which to draw the image.
DstTop	Specifies the y-coordinate in pixel of the upper-left corner of the destination rectangle at which to draw the image.
DstWidth	Specifies the width in pixel of the destination rectangle at which to draw the image.
DstHeight	Specifies the height in pixel of the destination rectangle at which to draw the image.
InterpolationMode	A member of the Drawing2D.InterPolationMode enumeration.

Returns

A member of the GdPictureStatus enumeration.

Example

Watermark an image to another image

Copy Code

   Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
       Dim oGdPictureImaging As New GdPicture.GdPictureImaging
       Imaging1.SetLicenseNumber("XXXX") 'Please, replace XXXX by a valid demo or commercial license key.
       'Go to http://evaluation-gdpicture.com to get a 1 month trial key unlocking all features of the toolkit.
 
       Dim ImageBackID As Integer = oGdPictureImaging.CreateGdPictureImageFromFile("c:image1.jpg")
       Dim ImageWatermarkID As Integer = oGdPictureImaging.CreateGdPictureImageFromFile("c:image2.jpg")
 
       'Drawing ImageBackID to the top left corner of ImageBackID.
       oGdPictureImaging.DrawGdPictureImageTransparency(ImageWatermarkID, ImageBackID, 150, 0, 0, 200, 200, Drawing2D.InterpolationMode.HighQualityBicubic)
 
       oGdPictureImaging.SaveAsJPEG(ImageBackID, "c:image3.jpg", 75)
 
       oGdPictureImaging.ReleaseGdPictureImage(ImageBackID)
       oGdPictureImaging.ReleaseGdPictureImage(ImageWatermarkID)
   End Sub