BitmapSource TryGetImage(string uriString, InternalImageOptions options)
{
if (uriString == null)
{
return(null);
}
var key = new ImageKey(uriString, options);
WeakReference weakImage;
BitmapSource image;
if (imageCache.TryGetValue(key, out weakImage))
{
image = weakImage.Target as BitmapSource;
if (image != null)
{
return(image);
}
}
image = TryLoadImage(uriString, options.PhysicalSize);
if (image == null)
{
return(null);
}
if (options.BackgroundColor != null)
{
image = ThemedImageCreator.CreateThemedBitmapSource(image, options.BackgroundColor.Value, isHighContrast);
}
imageCache[key] = new WeakReference(image);
return(image);
}
public ImageKey(string uri, InternalImageOptions options)
{
this.uri = uri;
this.options = options;
}
public BitmapSource GetImage(ImageReference imageReference, ImageOptions options)
{
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
if (imageReference.Name == null)
{
return(null);
}
var internalOptions = new InternalImageOptions();
internalOptions.BackgroundColor = options.BackgroundColor ?? GetColor(options.BackgroundBrush);
var logicalSize = options.LogicalSize;
if (logicalSize == new Size(0, 0))
{
logicalSize = new Size(16, 16);
}
internalOptions.Dpi = GetDpi(options.DpiObject, options.Dpi);
if (options.Zoom != new Size(0, 0))
{
internalOptions.Dpi = new Size(internalOptions.Dpi.Width * options.Zoom.Width, internalOptions.Dpi.Height * options.Zoom.Height);
}
internalOptions.Dpi = Round(internalOptions.Dpi);
if (internalOptions.Dpi.Width == 0 || internalOptions.Dpi.Height == 0)
{
return(null);
}
internalOptions.PhysicalSize = Round(new Size(logicalSize.Width * internalOptions.Dpi.Width / 96, logicalSize.Height * internalOptions.Dpi.Height / 96));
if (internalOptions.PhysicalSize.Width == 0 || internalOptions.PhysicalSize.Height == 0)
{
return(null);
}
if (imageReference.Assembly != null)
{
var name = imageReference.Name;
foreach (var provider in GetProviders(imageReference.Assembly))
{
var infos = provider.Value.GetImageSourceInfos(name);
if (infos == null)
{
continue;
}
var infoList = new List <ImageSourceInfo>(infos);
infoList.Sort((a, b) => {
if (a.Size == b.Size)
{
return(0);
}
// Try exact size first
if ((a.Size == internalOptions.PhysicalSize) != (b.Size == internalOptions.PhysicalSize))
{
return(a.Size == internalOptions.PhysicalSize ? -1 : 1);
}
// Try any-size (xaml images)
if ((a.Size == ImageSourceInfo.AnySize) != (b.Size == ImageSourceInfo.AnySize))
{
return(a.Size == ImageSourceInfo.AnySize ? -1 : 1);
}
// Closest size (using height)
if (a.Size.Height >= internalOptions.PhysicalSize.Height)
{
if (b.Size.Height < internalOptions.PhysicalSize.Height)
{
return(-1);
}
return(a.Size.Height.CompareTo(b.Size.Height));
}
else
{
if (b.Size.Height >= internalOptions.PhysicalSize.Height)
{
return(1);
}
return(b.Size.Height.CompareTo(a.Size.Height));
}
});
foreach (var info in infoList)
{
var bitmapSource = TryGetImage(info.Uri, internalOptions);
if (bitmapSource != null)
{
return(bitmapSource);
}
}
return(null);
}
return(null);
}
else
{
return(TryGetImage(imageReference.Name, internalOptions));
}
}
