/// <summary>
/// Helper method to try to get an image in the specified format from the dataObject
/// the DIB reader should solve some issues
/// It also supports Format17/DibV5, by using the following information: http://stackoverflow.com/a/14335591
/// </summary>
/// <param name="format">string with the format</param>
/// <param name="dataObject">IDataObject</param>
/// <returns>Bitmap or null</returns>
private static Bitmap GetBitmapForFormat(string format, IDataObject dataObject)
{
var clipboardObject = GetFromDataObject(dataObject, format);
var imageStream = clipboardObject as MemoryStream;
if (!IsValidStream(imageStream))
{
// TODO: add "HTML Format" support here...
return(clipboardObject as Bitmap);
}
if (CoreConfig.EnableSpecialDIBClipboardReader)
{
if (format == FORMAT_17 || format == DataFormats.Dib)
{
Log.Info().WriteLine("Found DIB stream, trying to process it.");
try
{
if (imageStream != null)
{
var dibBuffer = new byte[imageStream.Length];
imageStream.Read(dibBuffer, 0, dibBuffer.Length);
var infoHeader = BinaryStructHelper.FromByteArray <BitmapInfoHeader>(dibBuffer);
if (!infoHeader.IsDibV5)
{
Log.Info().WriteLine("Using special DIB <v5 format reader with biCompression {0}", infoHeader.Compression);
var fileHeaderSize = Marshal.SizeOf(typeof(BitmapFileHeader));
var fileHeader = BitmapFileHeader.Create(infoHeader);
var fileHeaderBytes = BinaryStructHelper.ToByteArray(fileHeader);
using (var bitmapStream = new MemoryStream())
{
bitmapStream.Write(fileHeaderBytes, 0, fileHeaderSize);
bitmapStream.Write(dibBuffer, 0, dibBuffer.Length);
bitmapStream.Seek(0, SeekOrigin.Begin);
var image = BitmapHelper.FromStream(bitmapStream);
if (image != null)
{
return(image);
}
}
}
else
{
Log.Info().WriteLine("Using special DIBV5 / Format17 format reader");
// CF_DIBV5
var gcHandle = IntPtr.Zero;
try
{
var handle = GCHandle.Alloc(dibBuffer, GCHandleType.Pinned);
gcHandle = GCHandle.ToIntPtr(handle);
return
(new Bitmap(infoHeader.Width, infoHeader.Height,
-(int)(infoHeader.SizeImage / infoHeader.Height),
infoHeader.BitCount == 32 ? PixelFormat.Format32bppArgb : PixelFormat.Format24bppRgb,
new IntPtr(handle.AddrOfPinnedObject().ToInt32() + infoHeader.OffsetToPixels + (infoHeader.Height - 1) * (int)(infoHeader.SizeImage / infoHeader.Height))
));
}
catch (Exception ex)
{
Log.Error().WriteLine(ex, "Problem retrieving Format17 from clipboard.");
}
finally
{
if (gcHandle == IntPtr.Zero)
{
GCHandle.FromIntPtr(gcHandle).Free();
}
}
}
}
}
catch (Exception dibEx)
{
Log.Error().WriteLine(dibEx, "Problem retrieving DIB from clipboard.");
}
}
}
else
{
Log.Info().WriteLine("Skipping special DIB format reader as it's disabled in the configuration.");
}
try
{
if (imageStream != null)
{
imageStream.Seek(0, SeekOrigin.Begin);
var tmpImage = BitmapHelper.FromStream(imageStream);
if (tmpImage != null)
{
Log.Info().WriteLine("Got image with clipboard format {0} from the clipboard.", format);
return(tmpImage);
}
}
}
catch (Exception streamImageEx)
{
Log.Error().WriteLine(streamImageEx, $"Problem retrieving {format} from clipboard.");
}
return(null);
}
