protected ImageSourceState GetLoadedSource(bool invalidateLayout)
{
if (_loadImageSource)
{
DisposeImageSources();
_fallbackSourceInUse = false;
_loadImageSource = false;
}
ImageSourceState allocatedSource = null;
ImageSource imageSource = _sourceState.ImageSource;
// Find a new image source
if (imageSource == null)
{
imageSource = _sourceState.ImageSource = LoadImageSource(Source, true);
_sourceState.Setup = false;
}
if (imageSource != null && !imageSource.IsAllocated)
{
_sourceState.Setup = false;
imageSource.Allocate();
}
if (imageSource != null && imageSource.IsAllocated)
{
allocatedSource = _sourceState;
}
else
{
ImageSource fallbackSource = _fallbackSourceState.ImageSource;
// If the source image could not load yet, try fallback image
if (fallbackSource == null)
{
fallbackSource = _fallbackSourceState.ImageSource = LoadImageSource(FallbackSource, false);
_fallbackSourceState.Setup = false;
}
if (fallbackSource != null && !fallbackSource.IsAllocated)
{
_fallbackSourceState.Setup = false;
fallbackSource.Allocate();
}
if (fallbackSource != null && fallbackSource.IsAllocated)
{
_fallbackSourceInUse = true;
allocatedSource = _fallbackSourceState;
}
}
if (invalidateLayout && allocatedSource != null && allocatedSource.ImageSource.SourceSize != _lastImageSourceSize)
{
InvalidateLayout(true, true);
}
HasImage = allocatedSource != null;
return(allocatedSource);
}
