I am using the following to convert a BitmapSource to a Bitmap:
internal static Bitmap ConvertBitmapSourceToBitmap(BitmapSource bitmapSrc)
{
int width = bitmapSrc.PixelWidth;
int height = bitmapSrc.PixelHeight;
int stride = width * ((bitmapSrc.Format.BitsPerPixel + 7) / 8);
byte[] bits = new byte[height * stride];
bitmapSrc.CopyPixels(bits, stride, 0);
unsafe
{
fixed (byte* pBits = bits)
{
IntPtr ptr = new IntPtr(pBits);
return new System.Drawing.Bitmap(
width,
height,
stride,
System.Drawing.Imaging.PixelFormat.Format32bppPArgb, //The problem
ptr);
}
}
}
But I don't know how to get the PixelFormat of the BitmapSource, so my images are mangled.
For context, I am using this technique because I want to load a tiff, which might be 8 or 16 grey or 24 or 32 bit color, and I need the PixelFormat to be preserved. I would prefer to fix my ConvertBitmapSourceToBitmap as it's rather handy, but would also be happy to replace the following code with a better technique for creating a Bitmap from a BitmapSource:
Byte[] buffer = File.ReadAllBytes(filename.FullName);
using (MemoryStream stream = new MemoryStream(buffer))
{
TiffBitmapDecoder tbd = new TiffBitmapDecoder(stream, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.OnLoad);
return BitmapBitmapSourceInterop.ConvertBitmapSourceToBitmap(tbd.Frames[0]);
}