VintaSoft Imaging .NET SDK v8.6
Vintasoft.Imaging Namespace / VintasoftImage Class / OpenPixelManipulator Method
Example



In This Topic
    OpenPixelManipulator Method
    In This Topic
    Creates new PixelManipulator for this image.
    Syntax
    'Declaration
     
    Public Function OpenPixelManipulator() As PixelManipulator
    public PixelManipulator OpenPixelManipulator()
    public: PixelManipulator* OpenPixelManipulator(); 
    public:
    PixelManipulator^ OpenPixelManipulator(); 

    Return Value

    New PixelManipulator for this image.
    Exceptions
    ExceptionDescription
    Throw if IsImageDataLocked is set to true.
    Example
    This example illustrates how to read scan line from an image, change blue color component value, and save changes.
    Class PixelManipulatorExample
        Public Sub RunExample()
            ' load an 24-bpp RGB image from disk
            ' [ do not forget to set your image file path here! ]
            Dim image As New Vintasoft.Imaging.VintasoftImage("c:\original-image.tif")
                
            ' get the PixelManipulator object
            Dim pixelManipulator As Vintasoft.Imaging.PixelManipulator = image.OpenPixelManipulator()
            ' set the lock area to full image size
            Dim lockRectangle As New System.Drawing.Rectangle(0, 0, image.Width, image.Height)
            ' lock pixels for read and write
            pixelManipulator.LockPixels(lockRectangle, Vintasoft.Imaging.BitmapLockMode.ReadWrite)
            ' remebmer the stride for performance purposes
            Dim stride As Integer = pixelManipulator.Stride
                
            ' process image
            For y As Integer = 0 To image.Height - 1
                ' read the next scan line
                Dim row As Byte() = pixelManipulator.ReadRowData(y)
                For i As Integer = 0 To stride - 1 Step 3
                    ' set every blue color component value to zero
                    row(i) = 0
                Next
                ' write the modified scan line
                pixelManipulator.WriteRowData(y, row)
            Next
                
            ' unlock pixels
            pixelManipulator.UnlockPixels()
            ' close PixelManipulator and generate the Vintasoft.Imaging.VintasoftImage.Changed event
            image.ClosePixelManipulator(True)
                
            ' save the processed image to the new file
            image.Save("c:\processed-image.tif")
        End Sub
                
    End Class
    class PixelManipulatorExample
    {
        public void RunExample()
        {
            // load an 24-bpp RGB image from disk
            // [ do not forget to set your image file path here! ]
            Vintasoft.Imaging.VintasoftImage image = 
                new Vintasoft.Imaging.VintasoftImage(@"c:\original-image.tif");
                
            // get the PixelManipulator object
            Vintasoft.Imaging.PixelManipulator pixelManipulator = image.OpenPixelManipulator();
            // set the lock area to full image size
            System.Drawing.Rectangle lockRectangle = 
                new System.Drawing.Rectangle(0, 0, image.Width, image.Height);
            // lock pixels for read and write
            pixelManipulator.LockPixels(lockRectangle, Vintasoft.Imaging.BitmapLockMode.ReadWrite);
            // remebmer the stride for performance purposes
            int stride = pixelManipulator.Stride;
                
            // process image
            for (int y = 0; y < image.Height; y++)
            {
                // read the next scan line
                byte[] row = pixelManipulator.ReadRowData(y);
                for (int i = 0; i < stride; i += 3)
                {
                    // set every blue color component value to zero
                    row[i] = 0;
                }
                // write the modified scan line
                pixelManipulator.WriteRowData(y, row);
            }
                
            // unlock pixels
            pixelManipulator.UnlockPixels();
            // close PixelManipulator and generate the Vintasoft.Imaging.VintasoftImage.Changed event
            image.ClosePixelManipulator(true);
                
            // save the processed image to the new file
            image.Save(@"c:\processed-image.tif");
        }
                
    }
    Requirements

    Target Platforms: Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP, Windows Server 2012, Windows Server 2008, Windows Server 2003

    See Also