private static BitmapSource RenderTxt(Stream input, IImageLoadingV1 parameters)
{
var len = input.Length;
if (input.Length > MaxLength)
{
len = MaxLength;
}
byte[] buf = new byte[len];
input.Read(buf, 0, buf.Length);
string allText = Encoding.UTF8.GetString(buf);
foreach (var v in InvalidStrings)
{
if (allText.Contains(v))
{
// Binary data - skip.
return(null);
}
}
allText = allText.Replace(EndLineChars, " ");
// `! +REPLACEME=[\d.]+?|Black
var txt = new FormattedText(allText, CultureInfo.CurrentCulture, FlowDirection.LeftToRight, new Typeface(RenderFontName), 10.0, Brushes.Black);
return(WriteTextToImage(txt, new Point(0, 0), parameters));
}
public static BitmapSource WriteTextToImage(FormattedText text, Point position, IImageLoadingV1 parameters)
{
var wid = parameters.Width;
if (wid == 0 || double.IsNaN(wid))
{
wid = DefaultSize;
}
var hei = parameters.Height;
if (hei == 0 || double.IsNaN(hei))
{
hei = DefaultSize;
}
var visual = new DrawingVisual();
var prop = hei / wid;
hei = (int)(wid * prop);
text.MaxTextWidth = wid;
using (var dc = visual.RenderOpen())
{
dc.DrawRectangle(Brushes.White, null, new Rect(new Size(wid, hei)));
dc.DrawText(text, position);
}
var target = new RenderTargetBitmap((int)wid, (int)hei, 96.0, 96.0, PixelFormats.Default);
target.Render(visual);
parameters.Format = TxtFormatName;
return(target);
}
