PaletteSetTransparentColor Method (GdPictureImaging)

In This Topic

Sets a color of a palette as transparent. If the specified color is not present into the palette this will be added if the number of entries is lower than 256.

Syntax

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

'Declaration
 
Public Function PaletteSetTransparentColor( _
   ByVal ImageID As Integer, _
   ByVal TransparentColor As Color _
) As GdPictureStatus

public GdPictureStatus PaletteSetTransparentColor( 
   int ImageID,
   Color TransparentColor
)

public function PaletteSetTransparentColor( 
    ImageID: Integer;
    TransparentColor: Color
): GdPictureStatus;

public function PaletteSetTransparentColor( 
   ImageID : int,
   TransparentColor : Color
) : GdPictureStatus;

public: GdPictureStatus PaletteSetTransparentColor( 
   int ImageID,
   Color TransparentColor
)

public:
GdPictureStatus PaletteSetTransparentColor( 
   int ImageID,
   Color TransparentColor
)

Parameters

ImageID: GdPicture image identifier.
TransparentColor: Color to set as transparent. A suitable color value can be obtained by using the ARGB() method.

Return Value

A member of the GdPictureStatus enumeration.

Example

Converting a bmp to a png and setting white as transparent color.

using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
    int imageID = gdpictureImaging.CreateGdPictureImageFromFile("image.bmp", false);
 
    // Convert to an 8-bit indexed color image using a standard color palette, set white as transparent and save to png.
    gdpictureImaging.ConvertTo8Bpp216(imageID);
    gdpictureImaging.PaletteSetTransparentColor(imageID, Color.White);
    gdpictureImaging.SaveAsPNG(imageID, "image.png", 6, false);
    gdpictureImaging.ReleaseGdPictureImage(imageID);
}

Reference

GdPictureImaging Class
GdPictureImaging Members
ARGB(Byte,Byte,Byte,Byte) Method