/// <summary>
/// Implementation of <see cref="System.Windows.Freezable.CloneCore(Freezable)">Freezable.CloneCore</see>.
/// </summary>
protected override void CloneCore(Freezable sourceFreezable)
{
UnmanagedBitmapWrapper sourceBitmap = (UnmanagedBitmapWrapper)sourceFreezable;
base.CloneCore(sourceFreezable);
CopyCommon(sourceBitmap);
}
/// <summary>
/// Implementation of <see cref="System.Windows.Freezable.GetCurrentValueAsFrozenCore(Freezable)">Freezable.GetCurrentValueAsFrozenCore</see>.
/// </summary>
protected override void GetCurrentValueAsFrozenCore(Freezable sourceFreezable)
{
UnmanagedBitmapWrapper sourceBitmap = (UnmanagedBitmapWrapper)sourceFreezable;
base.GetCurrentValueAsFrozenCore(sourceFreezable);
CopyCommon(sourceBitmap);
}
private void EnsureThumbnail()
{
if (_isThumbnailCached || IsDownloading)
{
return;
}
else
{
EnsureSource();
IntPtr /* IWICBitmapSource */ thumbnail = IntPtr.Zero;
lock (_syncObject)
{
// Check if there is embedded thumbnail or not
int hr = UnsafeNativeMethods.WICBitmapFrameDecode.GetThumbnail(
_frameSource,
out thumbnail
);
if (hr != (int)WinCodecErrors.WINCODEC_ERR_CODECNOTHUMBNAIL)
{
HRESULT.Check(hr);
}
}
_isThumbnailCached = true;
if (thumbnail != IntPtr.Zero)
{
BitmapSourceSafeMILHandle thumbHandle = new BitmapSourceSafeMILHandle(thumbnail);
SafeMILHandle unmanagedPalette = BitmapPalette.CreateInternalPalette();
BitmapPalette palette = null;
int hr = UnsafeNativeMethods.WICBitmapSource.CopyPalette(
thumbHandle,
unmanagedPalette
);
if (hr == HRESULT.S_OK)
{
palette = new BitmapPalette(unmanagedPalette);
}
_thumbnail = new UnmanagedBitmapWrapper(
CreateCachedBitmap(
null,
thumbHandle,
BitmapCreateOptions.PreservePixelFormat,
_cacheOption,
palette
));
_thumbnail.Freeze();
}
}
}
private void EnsureThumbnail()
{
if (_isThumbnailCached || IsDownloading)
{
return;
}
else
{
EnsureSource();
IntPtr /* IWICBitmapSource */ thumbnail = IntPtr.Zero;
lock (_syncObject)
{
// Check if there is embedded thumbnail or not
int hr = UnsafeNativeMethods.WICBitmapFrameDecode.GetThumbnail(
_frameSource,
out thumbnail
);
if (hr != (int)WinCodecErrors.WINCODEC_ERR_CODECNOTHUMBNAIL)
{
HRESULT.Check(hr);
}
}
_isThumbnailCached = true;
if (thumbnail != IntPtr.Zero)
{
BitmapSourceSafeMILHandle thumbHandle = new BitmapSourceSafeMILHandle(thumbnail);
SafeMILHandle unmanagedPalette = BitmapPalette.CreateInternalPalette();
BitmapPalette palette = null;
int hr = UnsafeNativeMethods.WICBitmapSource.CopyPalette(
thumbHandle,
unmanagedPalette
);
if (hr == HRESULT.S_OK)
{
palette = new BitmapPalette(unmanagedPalette);
}
_thumbnail = new UnmanagedBitmapWrapper(
CreateCachedBitmap(
null,
thumbHandle,
BitmapCreateOptions.PreservePixelFormat,
_cacheOption,
palette
));
_thumbnail.Freeze();
}
}
}
private void CopyCommon(UnmanagedBitmapWrapper sourceBitmap)
{
_bitmapInit.BeginInit();
_bitmapInit.EndInit();
}
private void CopyCommon(UnmanagedBitmapWrapper sourceBitmap)
{
_bitmapInit.BeginInit();
_bitmapInit.EndInit();
}
