private void SetResolution(uint bitmapWidth, uint bitmapHeight)
{
lock (updateLock)
{
if (map != IntPtr.Zero)
{
MemoryInternal.UnmapViewOfFile(map);
map = IntPtr.Zero;
}
if (section != IntPtr.Zero)
{
MemoryInternal.CloseHandle(section);
section = IntPtr.Zero;
}
uint imageSize = (uint)bitmapWidth * (uint)bitmapHeight;
if (imageSize == 0x00)
{
return;
}
// create memory section and map
section = MemoryInternal.CreateFileMapping(new IntPtr(-1), IntPtr.Zero, 0x04, 0, imageSize, null);
map = MemoryInternal.MapViewOfFile(section, 0xF001F, 0, 0, imageSize);
}
Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Render, (SendOrPostCallback) delegate
{
Bitmap = Imaging.CreateBitmapSourceFromMemorySection(section, (int)bitmapWidth, (int)bitmapHeight, PixelFormats.Gray8, (int)bitmapWidth, 0) as InteropBitmap;
Bitmap.Invalidate();
Source = Bitmap;
Stretch = System.Windows.Media.Stretch.Fill;
StretchDirection = StretchDirection.Both;
}, null);
}
private void Destroy()
{
lock (updateLock)
{
if (map != IntPtr.Zero)
{
MemoryInternal.UnmapViewOfFile(map);
map = IntPtr.Zero;
}
if (section != IntPtr.Zero)
{
MemoryInternal.CloseHandle(section);
section = IntPtr.Zero;
}
}
}