private InlineUIContainer RenderImage(HTML.Element e, ParagraphSizeTracker pst)
{
Uri ImageURI;
if (e.Attributes.ContainsKey("src") &&
Uri.TryCreate(e.Attributes["src"], UriKind.RelativeOrAbsolute, out ImageURI))
{
Image image = new Image()
{
Stretch = Stretch.Fill
};
BitmapImage bitmapImage = new BitmapImage();
bitmapImage.BeginInit();
bitmapImage.UriSource = ImageURI;
bitmapImage.EndInit();
image.Source = bitmapImage;
if (ImageSizeCache.ContainsKey(ImageURI))
{
Tuple <int, int> size = ImageSizeCache[ImageURI];
image.Width = size.Item1;
image.Height = size.Item2;
}
// This hack forces image size to match pixel size,
// which undermines WPF's preference for honoring the
// embedded DPI value which leads to upscaled and
// mildly blurry images where that doesn't match
// the local display. Very high resolution displays
// might need another approach.
bitmapImage.DownloadCompleted += (s, ee) =>
{
ImageSizeCache[ImageURI] = new Tuple <int, int>(bitmapImage.PixelWidth, bitmapImage.PixelHeight);
image.Width = bitmapImage.PixelWidth;
image.Height = bitmapImage.PixelHeight;
};
// Communicate image size info back up to the container
if (pst != null)
{
pst.Add(image);
}
if (e.Attributes.ContainsKey("title"))
{
image.ToolTip = e.Attributes["title"];
}
else if (e.Attributes.ContainsKey("alt"))
{
image.ToolTip = e.Attributes["alt"];
}
// TODO arrange to display alt value if image can't be loaded
// (or before it has loaded)
return(new InlineUIContainer()
{
Child = image
});
}
else
{
return(null);
}
}
