private void InitFromBitmapSource(
BitmapSource source
)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (source.PixelWidth < 0)
{
// Backwards Compat
HRESULT.Check((int)WinCodecErrors.WINCODEC_ERR_VALUEOVERFLOW);
}
if (source.PixelHeight < 0)
{
// Backwards Compat
HRESULT.Check((int)WinCodecErrors.WINCODEC_ERR_VALUEOVERFLOW);
}
BeginInit();
_syncObject = source.SyncObject;
lock (_syncObject)
{
Guid formatGuid = source.Format.Guid;
SafeMILHandle internalPalette = new SafeMILHandle();
if (source.Format.Palettized)
{
internalPalette = source.Palette.InternalPalette;
}
HRESULT.Check(MILSwDoubleBufferedBitmap.Create(
(uint)source.PixelWidth, // safe cast
(uint)source.PixelHeight, // safe cast
source.DpiX,
source.DpiY,
ref formatGuid,
internalPalette,
out _pDoubleBufferedBitmap
));
_pDoubleBufferedBitmap.UpdateEstimatedSize(
GetEstimatedSize(source.PixelWidth, source.PixelHeight, source.Format));
Lock();
Int32Rect rcFull = new Int32Rect(0, 0, _pixelWidth, _pixelHeight);
int bufferSize = checked(_backBufferStride.Value * source.PixelHeight);
source.CriticalCopyPixels(rcFull, _backBuffer, bufferSize, _backBufferStride.Value);
AddDirtyRect(rcFull);
Unlock();
}
EndInit();
}
