Newtone.ImageKit.WPF.ImageKit.Effect.SetBitmapPixel Method

This method sets the RGB value and the palette number of a specified pixel in the Device Independent Bitmap (DIB)

Parameters

x,y
   The x,y coordinates of the specified pixel

palette
   The palette number of the specified pixel

red
   The red component of the RGB value of the specified pixel

green
   The green component of the RGB value of the specified pixel

blue
   The blue component of the RGB value of the specified pixel

Return Value

Returns True if successful. Returns False if unsuccessful.

Explanation

The SetBitmapPixel method sets the RGB values and palette number of the specified pixel in the Device Independent Bitmap (DIB). For 1, 4, and 8 bit images, the applicable values are set in the Palette parameter. For 16, 24, and 32 bit images, the applicable values are set in the Red, Green, and Blue parameters.

The image to be processed is determined by the values set in the LayerNumber property.

To access the DIB and manipulate pixel data, you must use the following methods as a group:

StartBitmapAccess
    |
GetBitmapPixel, SetBitmapPixel
    |
EndBitmapAccess

Example

The following code starts access to the DIB, then loops through each pixel in the image, using the GetBitmapPixel method to retrieve the pixels' rgb values. Then those values are reversed and set using the SetBitmapPixel method (For 1, 16, 24, or 32 bit images).

 

[Visual Basic]
            Dim Ret As Boolean
            Dim i As Long, j As Long
            Dim PalNo As Integer, Red As Integer, Green As Integer, Blue As Integer

            Ret = ImageKit1.GetImageType()
            If Ret = False Then Exit Sub
            Ret = ImageKit1.Effect.StartBitmapAccess()
            If Ret = False Then Exit Sub                                

            For i = 0 To ImageKit1.Image.Height - 1
              For j = 0 To ImageKit1.Image.Width - 1
                Ret = ImageKit1.Effect.GetBitmapPixel(j, i, PalNo, Red, Green, Blue)
                If ImageKit1.BitCount = 1 Then
                  If PalNo <> 0 Then
                    PalNo = 0
                  Else
                    PalNo = 1
                  End If
                Else If ImageKit1.BitCount > 8 Then
                  Blue = 255 - Blue
                  Green = 255 - Green
                  Red = 255 - Red
                End If
                Ret = ImageKit1.Effect.SetBitmapPixel(j, i, PalNo, Red, Green, Blue)
              Next j
            Next i

            Ret = ImageKit1.Effect.EndBitmapAccess()
            ImageKit1.Refresh()
            

 

See Also

ImageKit.Effect Members | Newtone.ImageKit.Wpf.ImageKit