DrawGdPictureImageTransparency Method (GdPictureImaging)

In This Topic

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

Syntax

Visual Basic
C#
Delphi
JScript
Managed Extensions for C++
C++/CLI

'Declaration
 
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 GdPictureInterpolationMode _
) As GdPictureStatus

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

public function DrawGdPictureImageTransparency( 
    SrcImage: Integer;
    DstImage: Integer;
    Transparency: Integer;
    DstLeft: Integer;
    DstTop: Integer;
    DstWidth: Integer;
    DstHeight: Integer;
    InterpolationMode: GdPictureInterpolationMode
): GdPictureStatus;

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

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

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

Parameters

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

Return Value

A member of the GdPictureStatus enumeration.

Example

Rendering a blue image over a red image using defined transparency and saving the result into a png file.

using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
    System.Drawing.Drawing2D.InterpolationMode iMode = System.Drawing.Drawing2D.InterpolationMode.Default;
 
    int width = 180;
    int height = 180;
    int transparency = 100;
 
    // Create images.
    int backImage = gdpictureImaging.CreateNewGdPictureImage(340, 340, 24, 0);
    int redImage = gdpictureImaging.CreateNewGdPictureImage(width, height, 24, gdpictureImaging.ARGBI(255, 255, 0, 0));
    int blueImage = gdpictureImaging.CreateNewGdPictureImage(width, height, 24, gdpictureImaging.ARGBI(255, 0, 0, 255));
 
    // Render a red image without transparency.
    gdpictureImaging.DrawGdPictureImageTransparency(redImage, backImage, 0, 25, 25, width, height, iMode);
 
    // Render a blue image with defined transparency.
    gdpictureImaging.DrawGdPictureImageTransparency(blueImage, backImage, transparency, 135, 135, width, height, iMode);
 
    gdpictureImaging.SaveAsPNG(backImage, "output.png");
 
    // Release used resources
    gdpictureImaging.ReleaseGdPictureImage(redImage);
    gdpictureImaging.ReleaseGdPictureImage(blueImage);
    gdpictureImaging.ReleaseGdPictureImage(backImage);
}

Reference

GdPictureImaging Class
GdPictureImaging Members