/// <see cref="IDiagramRenderer.Render(Diagram)"/>
public ImageSource Render(Diagram diagram)
{
Uri imageUri;
if (diagram.ImageFile == null || !diagram.ImageFile.Exists ||
!Uri.TryCreate(diagram.ImageFile.FullName, UriKind.RelativeOrAbsolute, out imageUri))
{
return(null);
}
var bitmap = new BitmapImage();
using (bitmap.BeginInitialize())
{
bitmap.UriSource = imageUri;
// OMAR: Trick #6
// Unless we use this option, the image file is locked and cannot be modified.
// Looks like WPF holds read lock on the images. Very bad.
bitmap.CacheOption = BitmapCacheOption.OnLoad;
// Unless we use this option, an image cannot be refreshed. It loads from
// cache. Looks like WPF caches every image it loads in memory. Very bad.
bitmap.CreateOptions = BitmapCreateOptions.IgnoreImageCache;
}
return(bitmap);
}
/// <see cref="IDiagramRenderer.Render(Stream)"/>
public ImageSource Render(Stream imageData)
{
var bitmap = new BitmapImage();
using (bitmap.BeginInitialize())
bitmap.StreamSource = imageData;
bitmap.Freeze();
return(bitmap);
}