public static void Read(this Stream input, SafeHGlobalHandle buffer, long offset, int length)
{
try
{
using (UnmanagedMemoryStream output = new UnmanagedMemoryStream(buffer, 0, length, FileAccess.Write))
{
byte[] buff = new byte[Math.Min(32 * 1024, length)];
input.CopyTo(output, length, buff);
}
}
catch
{
buffer.Dispose();
throw;
}
}
public static SafeHGlobalHandle GetPixels(this BitmapSource self, out Int32Rect rect)
{
int size = self.PixelWidth * self.PixelHeight * self.Format.BitsPerPixel / 8;
rect = new Int32Rect(0, 0, self.PixelWidth, self.PixelHeight);
SafeHGlobalHandle buffer = new SafeHGlobalHandle(size);
try
{
self.CopyPixels(rect, buffer.DangerousGetHandle(), size, size / self.PixelHeight);
return(buffer);
}
catch
{
buffer.SafeDispose();
throw;
}
}
public static SafeHGlobalHandle ReadBuff(this Stream input, int size)
{
SafeHGlobalHandle handle = new SafeHGlobalHandle(size);
try
{
using (UnmanagedMemoryStream output = new UnmanagedMemoryStream(handle, 0, size, FileAccess.Write))
{
byte[] buff = new byte[Math.Min(32 * 1024, size)];
input.CopyTo(output, size, buff);
}
}
catch
{
handle.Dispose();
throw;
}
return(handle);
}