VintaSoft Imaging .NET SDK 12.3: Documentation for .NET developer
Vintasoft.Imaging.Codecs.ImageFiles Namespace / IRasterGridEditor Interface
Members Object Syntax Example Hierarchy Requirements SeeAlso
In This Topic
    IRasterGridEditor Interface
    In This Topic
    Defines an interface for raster image editor, which can replace image rectangle without reencoding of whole image.
    Object Model
    IRasterGridEditor
    Syntax
    'Declaration
    
    Public Interface IRasterGridEditor
    
    
    public interface IRasterGridEditor
    
    
    public __gc __interface IRasterGridEditor
    
    
    public interface class IRasterGridEditor
    
    
    Example

    Here is an example that shows how to get the first tile of specified TIFF page from specified file, rotate it 180 degrees, write back to its region, and save changes back to the TIFF file:

    
    ''' <summary>
    ''' Gets an image of first tile of TIFF page,
    ''' rotates the tile image 180 degrees,
    ''' sets changed tile image as new image of first tile,
    ''' saves changes to the source TIFF file.
    ''' </summary>
    Public Shared Sub ChangeTileOfTiffPage(tiffFilename As String, pageIndex As Integer)
        Using stream As System.IO.Stream = New System.IO.FileStream(tiffFilename, System.IO.FileMode.Open, System.IO.FileAccess.ReadWrite)
            Using decoder As New Vintasoft.Imaging.Codecs.Decoders.TiffDecoder(stream)
                ' get raster grid editor
                Dim rasterGridEditor As Vintasoft.Imaging.Codecs.ImageFiles.IRasterGridEditor = decoder.GetRasterGridEditor()
                ' get grid of raster regions
                Dim grid As System.Drawing.Rectangle() = rasterGridEditor.GetRasterEditorGrid(pageIndex)
                If grid Is Nothing OrElse grid.Length = 0 Then
                    Throw New System.Exception("Image tiles cannot be changed.")
                End If
    
                ' index of the region to change
                Dim rectIndex As Integer = 0
                ' get region to change
                Dim region As System.Drawing.Rectangle = grid(rectIndex)
                ' image of changing region
                Dim regionImage As Vintasoft.Imaging.VintasoftImage
                ' create image renderer
                Using renderer As New Vintasoft.Imaging.ImageRendering.ImageRenderer(decoder, pageIndex)
                    ' create region rendering task
                    Dim renderingTask As Vintasoft.Imaging.ImageRendering.ImageRenderingTask = Vintasoft.Imaging.ImageRendering.ImageRenderingTask.CreateImageRegion(region)
                    ' set to convert to the source format
                    renderingTask.ConvertDestImageToSourceFormat = True
                    ' get an image of first tile
                    regionImage = renderer.ExecuteRendering(renderingTask)
                End Using
    
                ' rotate the tile image 180 degrees
                regionImage.Flip(Vintasoft.Imaging.ImageProcessing.Transforms.ImageRotateFlipType.Rotate180FlipNone)
    
                ' set the tile image as new image of first tile
                rasterGridEditor.SetImageRect(pageIndex, rectIndex, regionImage, Nothing)
                regionImage.Dispose()
    
                ' save changes to the source TIFF file
                rasterGridEditor.SaveChanges(Nothing)
            End Using
        End Using
    
    
    
    /// <summary>
    /// Gets an image of first tile of TIFF page,
    /// rotates the tile image 180 degrees,
    /// sets changed tile image as new image of first tile,
    /// saves changes to the source TIFF file.
    /// </summary>
    public static void ChangeTileOfTiffPage(string tiffFilename, int pageIndex)
    {
        using (System.IO.Stream stream = new System.IO.FileStream(
            tiffFilename, System.IO.FileMode.Open, System.IO.FileAccess.ReadWrite))
        {
            using (Vintasoft.Imaging.Codecs.Decoders.TiffDecoder decoder =
                new Vintasoft.Imaging.Codecs.Decoders.TiffDecoder(stream))
            {
                // get raster grid editor
                Vintasoft.Imaging.Codecs.ImageFiles.IRasterGridEditor rasterGridEditor = decoder.GetRasterGridEditor();
                // get grid of raster regions
                System.Drawing.Rectangle[] grid = rasterGridEditor.GetRasterEditorGrid(pageIndex);
                if (grid == null || grid.Length == 0)
                    throw new System.Exception("Image tiles cannot be changed.");
    
                // index of the region to change
                int rectIndex = 0;
                // get region to change
                System.Drawing.Rectangle region = grid[rectIndex];
                // image of changing region
                Vintasoft.Imaging.VintasoftImage regionImage;
                // create image renderer
                using (Vintasoft.Imaging.ImageRendering.ImageRenderer renderer =
                    new Vintasoft.Imaging.ImageRendering.ImageRenderer(decoder, pageIndex))
                {
                    // create region rendering task
                    Vintasoft.Imaging.ImageRendering.ImageRenderingTask renderingTask =
                        Vintasoft.Imaging.ImageRendering.ImageRenderingTask.CreateImageRegion(region);
                    // set to convert to the source format
                    renderingTask.ConvertDestImageToSourceFormat = true;
                    // get an image of first tile
                    regionImage = renderer.ExecuteRendering(renderingTask);
                }
    
                // rotate the tile image 180 degrees
                regionImage.Flip(Vintasoft.Imaging.ImageProcessing.Transforms.ImageRotateFlipType.Rotate180FlipNone);
    
                // set the tile image as new image of first tile
                rasterGridEditor.SetImageRect(pageIndex, rectIndex, regionImage, null);
                regionImage.Dispose();
    
                // save changes to the source TIFF file
                rasterGridEditor.SaveChanges(null);
            }
        }
    
    

    %HIERARCHY%
    Requirements

    Target Platforms: .NET 8; .NET 7; .NET 6; .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5

    See Also