/// <summary>
/// Is there a Bitmap on the clipboard?
/// </summary>
/// <param name="clipboardAccessToken">IClipboardAccessToken</param>
/// <returns>bool</returns>
public static bool HasImage(this IClipboardAccessToken clipboardAccessToken)
{
var formats = clipboardAccessToken.AvailableFormats();
if (formats.Intersect(SupportedBitmapFormats).Any())
{
return(true);
}
return(clipboardAccessToken.GetFilenames()
.Select(filename => Path.GetExtension(filename).ToLowerInvariant())
.Intersect(SupportedExtensions)
.Any());
}
/// <summary>
/// A special format 17 bitmap reader
/// </summary>
/// <param name="clipboardAccessToken">IClipboardAccessToken</param>
/// <returns>Bitmap or null</returns>
public static Bitmap GetAsFormat17(this IClipboardAccessToken clipboardAccessToken)
{
var formats = clipboardAccessToken.AvailableFormats().ToList();
if (!formats.Contains("Format17"))
{
return(null);
}
var format17Bytes = clipboardAccessToken.GetAsBytes("Format17");
var infoHeader = BinaryStructHelper.FromByteArray <BitmapInfoHeader>(format17Bytes);
if (!infoHeader.IsDibV5)
{
return(null);
}
// Using special DIBV5 / Format17 format reader
// CF_DIBV5
var gcHandle = IntPtr.Zero;
try
{
var handle = GCHandle.Alloc(format17Bytes, 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();
}
}
return(null);
}
/// <summary>
/// Get a DIB from the Clipboard
/// </summary>
/// <param name="clipboardAccessToken"></param>
/// <returns>Bitmap or null</returns>
public static Bitmap GetAsDeviceIndependendBitmap(this IClipboardAccessToken clipboardAccessToken)
{
var formats = clipboardAccessToken.AvailableFormats().ToList();
if (!formats.Contains(StandardClipboardFormats.Bitmap.AsString()))
{
return(null);
}
var format17Bytes = clipboardAccessToken.GetAsBytes(StandardClipboardFormats.Bitmap.AsString());
var infoHeader = BinaryStructHelper.FromByteArray <BitmapInfoHeader>(format17Bytes);
if (infoHeader.IsDibV5)
{
Log.Warn().WriteLine("Getting DIBV5 (format 17) when requesting DIB");
return(null);
}
// Bitmap version older than 5
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(format17Bytes, 0, format17Bytes.Length);
bitmapStream.Seek(0, SeekOrigin.Begin);
var image = BitmapHelper.FromStream(bitmapStream);
if (image != null)
{
return(image);
}
}
return(null);
}
