/// Fired when the original's decoder's download has completed
private void OnOriginalDownloadCompleted(BitmapFrameDecode original, EventArgs e)
{
CleanUpWeakEventSink();
// Update the underlying decoder to match the original's
// We already have a _decoder from the cloning, but it's referencing the
// LateBoundBitmapDecoder. When download completes, LateBoundBitmapDecoder calls
// EnsureDecoder to make the _realDecoder (something like JpegBitmapDecoder),
// then calls SetupFrames on the _realDecoder, which calls BitmapFrameDecode's
// UpdateDecoder to set _decoder to the JpegBitmapDecoder. So the original's _decoder
// changes after download completes, and the clone should change as well.
UpdateDecoder(original.Decoder);
FireChanged();
_downloadEvent.InvokeEvents(this, e);
}
internal BitmapFrameDecode(
int frameNumber,
BitmapCreateOptions createOptions,
BitmapCacheOption cacheOption,
BitmapFrameDecode frameDecode
) : base(true)
{
_bitmapInit.BeginInit();
_frameNumber = frameNumber;
WicSourceHandle = frameDecode.WicSourceHandle;
IsSourceCached = frameDecode.IsSourceCached;
CreationCompleted = frameDecode.CreationCompleted;
_frameSource = frameDecode._frameSource;
_decoder = frameDecode.Decoder;
_syncObject = _decoder.SyncObject;
_createOptions = createOptions;
_cacheOption = cacheOption;
_thumbnail = frameDecode._thumbnail;
_isThumbnailCached = frameDecode._isThumbnailCached;
_metadata = frameDecode._metadata;
_isMetadataCached = frameDecode._isMetadataCached;
_readOnlycolorContexts = frameDecode._readOnlycolorContexts;
_isColorContextCached = frameDecode._isColorContextCached;
_bitmapInit.EndInit();
if ((createOptions & BitmapCreateOptions.DelayCreation) != 0)
{
DelayCreation = true;
}
else if (!CreationCompleted)
{
FinalizeCreation();
}
else
{
UpdateCachedSettings();
}
}
internal BitmapFrameDecode(
int frameNumber,
BitmapCreateOptions createOptions,
BitmapCacheOption cacheOption,
BitmapFrameDecode frameDecode
) : base(true)
{
_bitmapInit.BeginInit();
_frameNumber = frameNumber;
WicSourceHandle = frameDecode.WicSourceHandle;
IsSourceCached = frameDecode.IsSourceCached;
CreationCompleted = frameDecode.CreationCompleted;
_frameSource = frameDecode._frameSource;
_decoder = frameDecode.Decoder;
_syncObject = _decoder.SyncObject;
_createOptions = createOptions;
_cacheOption = cacheOption;
_thumbnail = frameDecode._thumbnail;
_isThumbnailCached = frameDecode._isThumbnailCached;
_metadata = frameDecode._metadata;
_isMetadataCached = frameDecode._isMetadataCached;
_readOnlycolorContexts = frameDecode._readOnlycolorContexts;
_isColorContextCached = frameDecode._isColorContextCached;
_bitmapInit.EndInit();
if ((createOptions & BitmapCreateOptions.DelayCreation) != 0)
{
DelayCreation = true;
}
else if (!CreationCompleted)
{
FinalizeCreation();
}
else
{
UpdateCachedSettings();
}
}
public WeakBitmapFrameDecodeEventSink(BitmapFrameDecode cloned, BitmapFrameDecode original)
: base(cloned)
{
_original = original;
if (!_original.IsFrozen)
{
_original.DownloadCompleted += OnSourceDownloadCompleted;
_original.DownloadFailed += OnSourceDownloadFailed;
_original.DownloadProgress += OnSourceDownloadProgress;
}
}
/// Fired when the original's decoder's download has completed
private void OnOriginalDownloadCompleted(BitmapFrameDecode original, EventArgs e)
{
CleanUpWeakEventSink();
// Update the underlying decoder to match the original's
// We already have a _decoder from the cloning, but it's referencing the
// LateBoundBitmapDecoder. When download completes, LateBoundBitmapDecoder calls
// EnsureDecoder to make the _realDecoder (something like JpegBitmapDecoder),
// then calls SetupFrames on the _realDecoder, which calls BitmapFrameDecode's
// UpdateDecoder to set _decoder to the JpegBitmapDecoder. So the original's _decoder
// changes after download completes, and the clone should change as well.
UpdateDecoder(original.Decoder);
FireChanged();
_downloadEvent.InvokeEvents(this, e);
}
private void CopyCommon(BitmapFrameDecode sourceBitmapFrameDecode)
{
_bitmapInit.BeginInit();
_frameNumber = sourceBitmapFrameDecode._frameNumber;
_isThumbnailCached = sourceBitmapFrameDecode._isThumbnailCached;
_isMetadataCached = sourceBitmapFrameDecode._isMetadataCached;
_isColorContextCached = sourceBitmapFrameDecode._isColorContextCached;
_frameSource = sourceBitmapFrameDecode._frameSource;
_thumbnail = sourceBitmapFrameDecode._thumbnail;
_metadata = sourceBitmapFrameDecode.InternalMetadata;
_readOnlycolorContexts = sourceBitmapFrameDecode._readOnlycolorContexts;
_decoder = sourceBitmapFrameDecode._decoder;
if (_decoder != null && _decoder.IsDownloading)
{
// UpdateDecoder must be called when download completes and the real decoder
// is created. Normally _decoder will call UpdateDecoder, but in this case the
// decoder will not know about the cloned BitmapFrameDecode and will only call
// UpdateDecoder on the original. The clone will need to listen to the original
// BitmapFrameDecode for DownloadCompleted, then call UpdateDecoder on itself.
// The weak event sink hooks up handlers on DownloadCompleted, DownloadFailed,
// and DownloadProgress
_weakBitmapFrameDecodeEventSink =
new WeakBitmapFrameDecodeEventSink(this, sourceBitmapFrameDecode);
}
_syncObject = _decoder.SyncObject;
_createOptions = sourceBitmapFrameDecode._createOptions;
_cacheOption = sourceBitmapFrameDecode._cacheOption;
_bitmapInit.EndInit();
}
internal void SetupFrames(BitmapDecoder decoder, ReadOnlyCollection<BitmapFrame> frames)
{
uint numFrames = 1;
HRESULT.Check(UnsafeNativeMethods.WICBitmapDecoder.GetFrameCount(_decoderHandle, out numFrames));
_frames = new List<BitmapFrame>((int)numFrames);
// initialize the list of frames to null.
// We'll fill it as it's used (pay for play).
for (int i = 0; i < (int)numFrames; i++)
{
if (i > 0 && _cacheOption != BitmapCacheOption.OnLoad)
{
_createOptions |= BitmapCreateOptions.DelayCreation;
}
BitmapFrameDecode bfd = null;
if ((frames != null) && (frames.Count == (i + 1)))
{
// If we already have a frames collection, get the BitmapFrame from it
bfd = frames[i] as BitmapFrameDecode;
bfd.UpdateDecoder(this);
}
else if (decoder == null)
{
// All frames should be frozen.
bfd = new BitmapFrameDecode(
i,
_createOptions,
_cacheOption,
this
);
bfd.Freeze();
}
else
{
// if we are creating from an existing cache, use the frames
// already stored in that cache
// All frames should be frozen.
bfd = new BitmapFrameDecode(
i,
_createOptions,
_cacheOption,
decoder.Frames[i] as BitmapFrameDecode
);
bfd.Freeze();
}
_frames.Add(bfd);
}
}
