/// <summary>
/// Write Multipart Form Data directly to the HttpWebRequest response stream
/// </summary>
/// <param name="boundary">Multipart separator</param>
/// <param name="name">Name of the thing</param>
/// <param name="formDataStream">Stream to write to</param>
public void WriteFormDataToStream(string boundary, string name, Stream formDataStream)
{
// Add just the first part of this param, since we will write the file data directly to the Stream
string header = $"--{boundary}\r\nContent-Disposition: form-data; name=\"{name}\"; filename=\"{Filename ?? name}\";\r\nContent-Type: {ContentType}\r\n\r\n";
formDataStream.Write(Encoding.UTF8.GetBytes(header), 0, Encoding.UTF8.GetByteCount(header));
ImageOutput.SaveToStream(_surface, formDataStream, _outputSettings);
}
/// <summary>
/// Create a Base64String from the Surface by saving it to a memory stream and converting it.
/// Should be avoided if possible, as this uses a lot of memory.
/// </summary>
/// <returns>string</returns>
public string ToBase64String(Base64FormattingOptions formattingOptions)
{
using (var stream = new MemoryStream())
{
ImageOutput.SaveToStream(_surface, stream, _outputSettings);
return(Convert.ToBase64String(stream.GetBuffer(), 0, (int)stream.Length, formattingOptions));
}
}
/// <summary>
/// Create a byte[] from the image by saving it to a memory stream.
/// Should be avoided if possible, as this uses a lot of memory.
/// </summary>
/// <returns>byte[]</returns>
public byte[] ToByteArray()
{
using (var stream = new MemoryStream())
{
ImageOutput.SaveToStream(_surface, stream, _outputSettings);
return(stream.ToArray());
}
}
/// <summary>
/// A plain "write data to stream"
/// </summary>
/// <param name="dataStream"></param>
public void WriteToStream(Stream dataStream)
{
// Write the file data directly to the Stream, rather than serializing it to a string.
ImageOutput.SaveToStream(_surface, dataStream, _outputSettings);
}
/// <summary>
/// Set an Image to the clipboard
/// This method will place images to the clipboard depending on the ClipboardFormats setting.
/// e.g. Bitmap which works with pretty much everything and type Dib for e.g. OpenOffice
/// because OpenOffice has a bug http://qa.openoffice.org/issues/show_bug.cgi?id=85661
/// The Dib (Device Indenpendend Bitmap) in 32bpp actually won't work with Powerpoint 2003!
/// When pasting a Dib in PP 2003 the Bitmap is somehow shifted left!
/// For this problem the user should not use the direct paste (=Dib), but select Bitmap
/// </summary>
public static void SetClipboardData(ISurface surface)
{
var dataObject = new DataObject();
// This will work for Office and most other applications
//ido.SetData(DataFormats.Bitmap, true, image);
MemoryStream dibStream = null;
MemoryStream dibV5Stream = null;
MemoryStream pngStream = null;
Bitmap bitmapToSave = null;
var disposeImage = false;
try
{
var outputSettings = new SurfaceOutputSettings(OutputFormats.png, 100, false);
// Create the image which is going to be saved so we don't create it multiple times
disposeImage = ImageOutput.CreateBitmapFromSurface(surface, outputSettings, out bitmapToSave);
try
{
// Create PNG stream
if (CoreConfig.ClipboardFormats.Contains(ClipboardFormats.PNG))
{
pngStream = new MemoryStream();
// PNG works for e.g. Powerpoint
var pngOutputSettings = new SurfaceOutputSettings(OutputFormats.png, 100, false);
ImageOutput.SaveToStream(bitmapToSave, null, pngStream, pngOutputSettings);
pngStream.Seek(0, SeekOrigin.Begin);
// Set the PNG stream
dataObject.SetData(FORMAT_PNG, false, pngStream);
}
}
catch (Exception pngEx)
{
Log.Error().WriteLine(pngEx, "Error creating PNG for the Clipboard.");
}
try
{
if (CoreConfig.ClipboardFormats.Contains(ClipboardFormats.DIB))
{
using (var tmpBmpStream = new MemoryStream())
{
// Save image as BMP
var bmpOutputSettings = new SurfaceOutputSettings(OutputFormats.bmp, 100, false);
ImageOutput.SaveToStream(bitmapToSave, null, tmpBmpStream, bmpOutputSettings);
dibStream = new MemoryStream();
// Copy the source, but skip the "BITMAPFILEHEADER" which has a size of 14
dibStream.Write(tmpBmpStream.GetBuffer(), BITMAPFILEHEADER_LENGTH, (int)tmpBmpStream.Length - BITMAPFILEHEADER_LENGTH);
}
// Set the DIB to the clipboard DataObject
dataObject.SetData(DataFormats.Dib, true, dibStream);
}
}
catch (Exception dibEx)
{
Log.Error().WriteLine(dibEx, "Error creating DIB for the Clipboard.");
}
// CF_DibV5
try
{
if (CoreConfig.ClipboardFormats.Contains(ClipboardFormats.DIBV5))
{
// Create the stream for the clipboard
dibV5Stream = new MemoryStream();
// Create the BITMAPINFOHEADER
var header = BitmapInfoHeader.Create(bitmapToSave.Width, bitmapToSave.Height, 32);
// Make sure we have BI_BITFIELDS, this seems to be normal for Format17?
header.Compression = BitmapCompressionMethods.BI_BITFIELDS;
var headerBytes = BinaryStructHelper.ToByteArray(header);
// Write the BITMAPINFOHEADER to the stream
dibV5Stream.Write(headerBytes, 0, headerBytes.Length);
// As we have specified BI_COMPRESSION.BI_BITFIELDS, the BitfieldColorMask needs to be added
var colorMask = BitfieldColorMask.Create();
// Create the byte[] from the struct
var colorMaskBytes = BinaryStructHelper.ToByteArray(colorMask);
Array.Reverse(colorMaskBytes);
// Write to the stream
dibV5Stream.Write(colorMaskBytes, 0, colorMaskBytes.Length);
// Create the raw bytes for the pixels only
var bitmapBytes = BitmapToByteArray(bitmapToSave);
// Write to the stream
dibV5Stream.Write(bitmapBytes, 0, bitmapBytes.Length);
// Set the DIBv5 to the clipboard DataObject
dataObject.SetData(FORMAT_17, true, dibV5Stream);
}
}
catch (Exception dibEx)
{
Log.Error().WriteLine(dibEx, "Error creating DIB for the Clipboard.");
}
// Set the HTML
if (CoreConfig.ClipboardFormats.Contains(ClipboardFormats.HTML))
{
var tmpFile = ImageOutput.SaveToTmpFile(surface, new SurfaceOutputSettings(OutputFormats.png, 100, false), null);
var html = GetHtmlString(surface, tmpFile);
dataObject.SetText(html, TextDataFormat.Html);
}
else if (CoreConfig.ClipboardFormats.Contains(ClipboardFormats.HTMLDATAURL))
{
string html;
using (var tmpPngStream = new MemoryStream())
{
var pngOutputSettings = new SurfaceOutputSettings(OutputFormats.png, 100, false)
{
// Do not allow to reduce the colors, some applications dislike 256 color images
// reported with bug #3594681
DisableReduceColors = true
};
// Check if we can use the previously used image
if (bitmapToSave.PixelFormat != PixelFormat.Format8bppIndexed)
{
ImageOutput.SaveToStream(bitmapToSave, surface, tmpPngStream, pngOutputSettings);
}
else
{
ImageOutput.SaveToStream(surface, tmpPngStream, pngOutputSettings);
}
html = GetHtmlDataUrlString(surface, tmpPngStream);
}
dataObject.SetText(html, TextDataFormat.Html);
}
}
finally
{
// we need to use the SetDataOject before the streams are closed otherwise the buffer will be gone!
// Check if Bitmap is wanted
if (CoreConfig.ClipboardFormats.Contains(ClipboardFormats.BITMAP))
{
dataObject.SetImage(bitmapToSave);
// Place the DataObject to the clipboard
SetDataObject(dataObject, true);
}
else
{
// Place the DataObject to the clipboard
SetDataObject(dataObject, true);
}
pngStream?.Dispose();
dibStream?.Dispose();
dibV5Stream?.Dispose();
// cleanup if needed
if (disposeImage)
{
bitmapToSave?.Dispose();
}
}
}
