/// <summary>
/// the DIB readed should solve the issue reported here: https://sourceforge.net/projects/greenshot/forums/forum/676083/topic/6354353/index/page/1
/// </summary>
/// <returns>Image</returns>
private static Image GetDIBImage(IDataObject dataObejct)
{
try {
// If the EnableSpecialDIBClipboardReader flag in the config is set, use the code from:
// http://www.thomaslevesque.com/2009/02/05/wpf-paste-an-image-from-the-clipboard/
// to read the DeviceIndependentBitmap from the clipboard, this might fix bug 3576125
if (config.EnableSpecialDIBClipboardReader)
{
MemoryStream dibStream = GetFromDataObject(dataObejct, DataFormats.Dib) as MemoryStream;
if (isValidStream(dibStream))
{
LOG.Info("Found valid DIB stream, trying to process it.");
byte[] dibBuffer = new byte[dibStream.Length];
dibStream.Read(dibBuffer, 0, dibBuffer.Length);
BitmapInfoHeader infoHeader = BinaryStructHelper.FromByteArray <BitmapInfoHeader>(dibBuffer);
LOG.InfoFormat("Using special DIB format reader for biCompression {0}", infoHeader.biCompression);
int fileHeaderSize = Marshal.SizeOf(typeof(BitmapFileHeader));
uint infoHeaderSize = infoHeader.biSize;
int fileSize = (int)(fileHeaderSize + infoHeader.biSize + infoHeader.biSizeImage);
BitmapFileHeader fileHeader = new BitmapFileHeader();
fileHeader.bfType = BitmapFileHeader.BM;
fileHeader.bfSize = fileSize;
fileHeader.bfReserved1 = 0;
fileHeader.bfReserved2 = 0;
fileHeader.bfOffBits = (int)(fileHeaderSize + infoHeaderSize + infoHeader.biClrUsed * 4);
byte[] fileHeaderBytes = BinaryStructHelper.ToByteArray <BitmapFileHeader>(fileHeader);
using (MemoryStream bitmapStream = new MemoryStream()) {
bitmapStream.Write(fileHeaderBytes, 0, fileHeaderSize);
bitmapStream.Write(dibBuffer, 0, dibBuffer.Length);
bitmapStream.Seek(0, SeekOrigin.Begin);
using (Image tmpImage = Image.FromStream(bitmapStream)) {
if (tmpImage != null)
{
return(ImageHelper.Clone(tmpImage));
}
}
}
}
}
else
{
LOG.Info("Skipping special DIB format reader as it's disabled in the configuration.");
}
} catch (Exception dibEx) {
LOG.Error("Problem retrieving DIB from clipboard.", dibEx);
}
return(null);
}
/// <summary>
/// Helper method to try to get an image in the specified format from the dataObject
/// the DIB readed should solve the issue reported here: https://sourceforge.net/projects/greenshot/forums/forum/676083/topic/6354353/index/page/1
/// 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>Image or null</returns>
private static Image GetImageForFormat(string format, IDataObject dataObject)
{
object clipboardObject = GetFromDataObject(dataObject, format);
MemoryStream imageStream = clipboardObject as MemoryStream;
if (!isValidStream(imageStream))
{
// TODO: add "HTML Format" support here...
return(clipboardObject as Image);
}
else
{
if (config.EnableSpecialDIBClipboardReader)
{
if (format == FORMAT_17 || format == DataFormats.Dib)
{
LOG.Info("Found DIB stream, trying to process it.");
try
{
byte[] dibBuffer = new byte[imageStream.Length];
imageStream.Read(dibBuffer, 0, dibBuffer.Length);
BITMAPINFOHEADER infoHeader = BinaryStructHelper.FromByteArray <BITMAPINFOHEADER>(dibBuffer);
if (!infoHeader.IsDibV5)
{
LOG.InfoFormat("Using special DIB <v5 format reader with biCompression {0}", infoHeader.biCompression);
int fileHeaderSize = Marshal.SizeOf(typeof(BITMAPFILEHEADER));
uint infoHeaderSize = infoHeader.biSize;
int fileSize = (int)(fileHeaderSize + infoHeader.biSize + infoHeader.biSizeImage);
BITMAPFILEHEADER fileHeader = new BITMAPFILEHEADER();
fileHeader.bfType = BITMAPFILEHEADER.BM;
fileHeader.bfSize = fileSize;
fileHeader.bfReserved1 = 0;
fileHeader.bfReserved2 = 0;
fileHeader.bfOffBits = (int)(fileHeaderSize + infoHeaderSize + infoHeader.biClrUsed * 4);
byte[] fileHeaderBytes = BinaryStructHelper.ToByteArray <BITMAPFILEHEADER>(fileHeader);
using (MemoryStream bitmapStream = new MemoryStream())
{
bitmapStream.Write(fileHeaderBytes, 0, fileHeaderSize);
bitmapStream.Write(dibBuffer, 0, dibBuffer.Length);
bitmapStream.Seek(0, SeekOrigin.Begin);
using (Image tmpImage = Image.FromStream(bitmapStream))
{
if (tmpImage != null)
{
return(ImageHelper.Clone(tmpImage));
}
}
}
}
else
{
LOG.Info("Using special DIBV5 / Format17 format reader");
// CF_DIBV5
IntPtr gcHandle = IntPtr.Zero;
try
{
GCHandle handle = GCHandle.Alloc(dibBuffer, GCHandleType.Pinned);
gcHandle = GCHandle.ToIntPtr(handle);
return(new Bitmap(infoHeader.biWidth, infoHeader.biHeight, -(int)(infoHeader.biSizeImage / infoHeader.biHeight),
infoHeader.biBitCount == 32 ? PixelFormat.Format32bppArgb : PixelFormat.Format24bppRgb,
new IntPtr(handle.AddrOfPinnedObject().ToInt32() + infoHeader.OffsetToPixels + (infoHeader.biHeight - 1) * (int)(infoHeader.biSizeImage / infoHeader.biHeight))));
}
catch (Exception ex)
{
LOG.Error("Problem retrieving Format17 from clipboard.", ex);
}
finally
{
if (gcHandle == IntPtr.Zero)
{
GCHandle.FromIntPtr(gcHandle).Free();
}
}
}
}
catch (Exception dibEx)
{
LOG.Error("Problem retrieving DIB from clipboard.", dibEx);
}
}
}
else
{
LOG.Info("Skipping special DIB format reader as it's disabled in the configuration.");
}
try
{
imageStream.Seek(0, SeekOrigin.Begin);
using (Image tmpImage = Image.FromStream(imageStream, true, true))
{
if (tmpImage != null)
{
LOG.InfoFormat("Got image with clipboard format {0} from the clipboard.", format);
return(ImageHelper.Clone(tmpImage));
}
}
}
catch (Exception streamImageEx)
{
LOG.Error(string.Format("Problem retrieving {0} from clipboard.", format), streamImageEx);
}
}
return(null);
}
